10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______ to ______

Commission file number: 1-12616

SUN COMMUNITIES, INC

(Exact Name of Registrant as Specified in its Charter)

Maryland	38-2730780
(State of Incorporation)	(I.R.S. Employer Identification No.)

27777 Franklin Rd,	Suite 300,	Southfield,	Michigan	48034
(Address of Principal Executive Offices)				(Zip Code)

(248) 208-2500

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.01 par value	SUI	New York Stock Exchange

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒  No ☐

Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).  Yes ☒  No ☐

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	Accelerated filer	Non-accelerated filer	Smaller reporting company	Emerging growth company
☒	☐	☐	☐	☐

If an emerging growth company, indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐  No ☒

Number of shares of Common Stock, $0.01 par value per share, outstanding as of April 25, 2024: 124,634,174

INDEX

PART I – FINANCIAL INFORMATION
Item 1.	Consolidated Financial Statements
	Consolidated Balance Sheets as of March 31, 2024 (Unaudited) and December 31, 2023	1
	Consolidated Statements of Operations for the Three Months Ended March 31, 2024 and 2023 (Unaudited)	2
	Consolidated Statements of Comprehensive Loss for the Three Months Ended March 31, 2024 and 2023 (Unaudited)	3
	Consolidated Statements of Equity for the Three Months Ended March 31, 2024 and 2023 (Unaudited)	4
	Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2024 and 2023 (Unaudited)	5
	Notes to Consolidated Financial Statements (Unaudited)	6
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations	40
Item 3.	Quantitative and Qualitative Disclosures about Market Risk	61
Item 4.	Controls and Procedures	62
PART II – OTHER INFORMATION
Item 1.	Legal Proceedings	63
Item 1A.	Risk Factors	63
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	64
Item 6.	Exhibits	65
	Signatures	67

SUN COMMUNITIES, INC.

PART I - FINANCIAL INFORMATION

ITEM 1.  CONSOLIDATED FINANCIAL STATEMENTS

CONSOLIDATED BALANCE SHEETS

(In millions, except for per share amounts)

	(Unaudited)
	March 31, 2024		December 31, 2023
Assets
Land	$	4,551.7	$	4,278.2
Land improvements and buildings	11,529.5		11,682.2
Rental homes and improvements	755.9		744.4
Furniture, fixtures and equipment	1,031.3		1,011.7
Investment property	17,868.4		17,716.5
Accumulated depreciation	(3,410.5)		(3,272.9)
Investment property, net (see Note 8 at VIEs)	14,457.9		14,443.6
Cash, cash equivalents and restricted cash (see Note 8 at VIEs)	132.5		42.7
Inventory of manufactured homes	191.0		205.6
Notes and other receivables, net	469.1		421.6
Collateralized receivables, net	56.5		56.2
Goodwill	731.4		733.0
Other intangible assets, net (see Note 8 at VIEs)	361.7		369.5
Other assets, net (see Note 8 at VIEs)	713.2		668.5
Total Assets	$	17,113.3	$	16,940.7
Liabilities
Mortgage loans payable (see Note 9; Note 8 at VIEs)	$	3,465.5	$	3,478.9
Secured borrowings on collateralized receivables (See Note 5)	56.1		55.8
Unsecured debt (see Note 9; Note 8 at VIEs)	4,350.4		4,242.6
Distributions payable	119.7		118.2
Advanced reservation deposits and rent (see Note 8 at VIEs)	480.4		344.5
Accrued expenses and accounts payable (see Note 8 at VIEs)	370.4		313.7
Other liabilities (see Note 8 at VIEs)	987.5		953.1
Total Liabilities	9,830.0		9,506.8
Commitments and contingencies (see Note 17)
Temporary equity (see Note 10; Note 8 at VIEs)	259.7		260.9
Shareholders' Equity
Common stock, $0.01 par value. Authorized: 360.0 shares; Issued and outstanding: 124.6 at March 31, 2024 and 124.4 at December 31, 2023	1.2		1.2
Additional paid-in capital	9,471.4		9,466.9
Accumulated other comprehensive income	6.7		12.2
Distributions in excess of accumulated earnings	(2,540.6)		(2,397.5)
Total SUI shareholders' equity	6,938.7		7,082.8
Noncontrolling interests
Common and preferred OP units	84.9		90.2
Total noncontrolling interests	84.9		90.2
Total Shareholders' Equity	7,023.6		7,173.0
Total Liabilities, Temporary Equity and Shareholders' Equity	$	17,113.3	$	16,940.7

See accompanying Notes to Consolidated Financial Statements.

1

SUN COMMUNITIES, INC.

CONSOLIDATED STATEMENTS OF OPERATIONS

(In millions, except for per share amounts) (Unaudited)

	Three Months Ended
	March 31, 2024		March 31, 2023
Revenues			As Restated
Real property	$	476.9	$	441.6
Home sales	68.9		86.3
Service, retail, dining and entertainment	117.9		102.4
Interest	4.6		11.4
Brokerage commissions and other, net	3.0		9.5
Total Revenues	671.3		651.2
Expenses
Property operating and maintenance	159.7		157.2
Real estate tax	31.3		30.1
Home costs and selling	51.9		62.6
Service, retail, dining and entertainment	115.9		99.8
General and administrative	78.5		64.1
Catastrophic event-related charges, net (see Note 17)	7.2		1.0
Business combinations	—		2.8
Depreciation and amortization	165.3		155.6
Asset impairments	20.7		2.4
Goodwill impairment (see Note 6)	—		15.4
Loss on extinguishment of debt (see Note 9)	0.6		—
Interest	89.7		76.6
Interest on mandatorily redeemable preferred OP units / equity	—		1.0
Total Expenses	720.8		668.6
Loss Before Other Items	(49.5)		(17.4)
Loss on remeasurement of marketable securities (see Note 16)	—		(19.9)
Gain / (loss) on foreign currency exchanges	1.1		(2.7)
Gain / (loss) on dispositions of properties (see Note 3)	5.4		(1.6)
Other income / (expense), net	8.0		(1.0)
Loss on remeasurement of notes receivable (see Note 4)	(0.7)		(1.7)
Income / (loss) from nonconsolidated affiliates (see Note 7)	1.4		(0.2)
Gain / (loss) on remeasurement of investment in nonconsolidated affiliates (see Note 7)	5.2		(4.5)
Current tax expense (see Note 13)	(2.1)		(3.9)
Deferred tax benefit (see Note 13)	5.7		4.6
Net Loss	(25.5)		(48.3)
Less: Preferred return to preferred OP units / equity interests	3.2		2.4
Less: Loss attributable to noncontrolling interests	(1.3)		(5.8)
Net Loss Attributable to SUI Common Shareholders	$	(27.4)	$	(44.9)
Weighted average common shares outstanding - basic	123.6		123.3
Weighted average common shares outstanding - diluted	126.6		126.2
Basic loss per share (see Note 14)	$	(0.22)	$	(0.36)
Diluted loss per share (see Note 14)	$	(0.22)	$	(0.36)

See accompanying Notes to Consolidated Financial Statements.

2

SUN COMMUNITIES, INC.

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS

(In millions) (Unaudited)

	Three Months Ended
	March 31, 2024		March 31, 2023
			As Restated
Net Loss	$	(25.5)	$	(48.3)
Foreign Currency Translation
Foreign currency translation gain / (loss) arising during period	(9.2)		16.9
Adjustment for accumulated foreign currency translation loss reclassified into earnings	—		11.9
Net foreign currency translation gain / (loss)	(9.2)		28.8
Cash Flow Hedges
Change in unrealized gain / (loss) on interest rate derivatives	8.8		(8.6)
Less: Interest rate derivative gain reclassified to earnings	(4.9)		(2.3)
Net unrealized gain / (loss) on interest rate derivatives	3.9		(10.9)
Total Comprehensive Loss	(30.8)		(30.4)
Less: Comprehensive loss attributable to noncontrolling interests	1.1		5.2
Comprehensive Loss attributable to SUI	$	(29.7)	$	(25.2)

See accompanying Notes to Consolidated Financial Statements.

3

SUN COMMUNITIES, INC.

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY

(In millions) (Unaudited)

				Shareholders' Equity
	Temporary Equity		Common Stock (Shares)	Common Stock ($Value)		Additional Paid-in Capital		Distributions in Excess of Accumulated Earnings		Accumulated Other Comprehensive Income / (Loss)		Noncontrolling Interests		Total Shareholders' Equity		Total Equity
Balance at December 31, 2023	$	260.9	124.4	$	1.2	$	9,466.9	$	(2,397.5)	$	12.2	$	90.2	$	7,173.0	$	7,433.9
Issuance of common stock and common OP units, net	—		0.3	—		(0.3)		—		—		0.6		0.3		0.3
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards	—		(0.2)	—		(7.6)		—		—		—		(7.6)		(7.6)
Conversion of OP units	(0.5)		0.1	—		2.1		—		—		(1.6)		0.5		—
Share-based compensation - amortization and forfeitures	—		—	—		10.3		0.1		—		—		10.4		10.4
Other comprehensive income / (loss)	—		—	—		—		—		(5.5)		0.2		(5.3)		(5.3)
Net loss	(0.3)		—	—		—		(24.2)		—		(1.0)		(25.2)		(25.5)
Distributions	(2.3)		—	—		—		(117.1)		—		(3.5)		(120.6)		(122.9)
OP Units accretion	1.9		—	—		—		(1.9)		—		—		(1.9)		—
Balance at March 31, 2024	$	259.7	124.6	$	1.2	$	9,471.4	$	(2,540.6)	$	6.7	$	84.9	$	7,023.6	$	7,283.3

				Shareholders' Equity
	Temporary Equity		Common Stock (Shares)	Common Stock ($Value)		Additional Paid-in Capital		Distributions in Excess of Accumulated Earnings		Accumulated Other Comprehensive Income / (loss)		Noncontrolling Interests		Total Shareholders' Equity		Total Equity
Balance at December 31, 2022	$	202.9	124.0	$	1.2	$	9,549.7	$	(1,731.2)	$	(9.9)	$	78.7	$	7,888.5	$	8,091.4
Issuance of common stock and common OP units, net	—		0.4	—		—		—		—		4.4		4.4		4.4
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards	—		(0.1)	—		(11.0)		—		—		—		(11.0)		(11.0)
Conversion of OP units	—		0.1	—		7.3		—		—		—		7.3		7.3
Issuance of third party equity interests in consolidated entities	1.7		—	—		—		—		—		—		—		1.7
Share-based compensation - amortization and forfeitures	—		—	—		10.4		—		—		—		10.4		10.4
Issuance of Series K preferred OP units	100.0		—	—		—		—		—		—		—		100.0
Other comprehensive income	—		—	—		—		—		17.3		0.6		17.9		17.9
Net loss	(4.6)		—	—		—		(42.5)		—		(1.2)		(43.7)		(48.3)
Distributions	(1.5)		—	—		—		(115.8)		—		(3.1)		(118.9)		(120.4)
OP Units accretion	0.3		—	—		—		(0.3)		—		—		(0.3)		—
Balance at March 31, 2023, As Restated	$	298.8	124.4	$	1.2	$	9,556.4	$	(1,889.8)	$	7.4	$	79.4	$	7,754.6	$	8,053.4

See accompanying Notes to Consolidated Financial Statements.

4

SUN COMMUNITIES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(In millions) (Unaudited)

	Three Months Ended
	March 31, 2024		March 31, 2023
Operating Activities
Net Cash Provided By Operating Activities	$	242.5	$	194.5
Investing Activities
Investment in properties	(160.6)		(301.8)
Acquisitions, net of cash acquired	(29.9)		(47.9)
Proceeds from deposit on acquisition	0.9		1.4
Proceeds from insurance	2.3		4.9
Proceeds from disposition of assets and depreciated homes, net	2.0		15.5
Proceeds related to disposition of properties	51.7		0.2
Issuance of notes and other receivables	(2.0)		(6.2)
Repayments of notes and other receivables	7.2		3.3
Investments in nonconsolidated affiliates	(4.3)		(2.7)
Distributions of capital from nonconsolidated affiliates	5.6		11.4
Net Cash Used For Investing Activities	(127.1)		(321.9)
Financing Activities
Issuance and costs of common stock, OP units and preferred OP units, net	(0.3)		—
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards	(7.6)		(11.0)
Borrowings on lines of credit	1,260.5		626.0
Payments on lines of credit	(1,637.8)		(951.1)
Proceeds from issuance of other debt	499.4		583.0
Contributions from noncontrolling interest	—		1.7
Payments on other debt	(14.2)		(19.8)
Distributions	(121.4)		(113.6)
Payments for deferred financing costs, net of prepaid return	(4.0)		(3.6)
Net Cash Provided By / (Used For) Financing Activities	(25.4)		111.6
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(0.2)		0.2
Net change in cash, cash equivalents and restricted cash	89.8		(15.6)
Cash, cash equivalents and restricted cash, beginning of period	42.7		90.4
Cash, Cash Equivalents and Restricted Cash, End of Period	$	132.5	$	74.8

	Three Months Ended
	March 31, 2024		March 31, 2023
Supplemental Information
Cash paid for interest (net of capitalized interest of $2.7 and $2.5, respectively)	$	87.4	$	72.2
Cash paid for interest on mandatorily redeemable debt	$	—	$	1.0
Cash paid for income taxes	$	0.6	$	10.0
Noncash investing and financing activities
Reduction in secured borrowing balance	$	1.2	$	—
Change in distributions declared and outstanding	$	1.5	$	6.9
Conversion of common and preferred OP units	$	2.1	$	7.3
Assets held for sale, net (included within Other Assets, net and Other Liabilities)	$	—	$	262.1
ROU asset obtained from new operating lease liabilities	$	3.2	$	0.2
Issuance of notes and other receivables in relation to disposition of properties	$	—	$	111.2
Noncash investing and financing activities at the date of acquisition
Acquisitions - Common stock and OP units issued	$	0.6	$	4.5
Acquisitions - Series K preferred interest	$	—	$	100.0

See accompanying Notes to Consolidated Financial Statements.

5

SUN COMMUNITIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Basis of Presentation

Sun Communities, Inc., and all wholly-owned or majority-owned and controlled subsidiaries, including Sun Communities Operating Limited Partnership (the "Operating Partnership"), Sun Home Services, Inc. ("SHS"), Safe Harbor Marinas, LLC ("Safe Harbor") and the entities through which we operate our business in the United Kingdom (collectively, "Park Holidays") are referred to herein as the "Company," "SUI," "us," "we," or "our."

We follow accounting standards set by the Financial Accounting Standards Board ("FASB"). FASB establishes accounting principles generally accepted in the United States of America ("GAAP"), which we follow to ensure that we consistently report our financial condition, results of operations and cash flows. References to GAAP issued by the FASB in these footnotes are to the FASB Accounting Standards Codification ("ASC"). These unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial information and in accordance with GAAP. We present interim disclosures and certain information and footnote disclosures as required by SEC rules and regulations. Accordingly, the unaudited Consolidated Financial Statements do not include all of the information and footnotes required by GAAP for complete financial statements. The accompanying unaudited Consolidated Financial Statements reflect, in the opinion of management, all adjustments, including adjustments of a normal and recurring nature, necessary for a fair presentation of the interim financial statements. All significant intercompany transactions have been eliminated in consolidation. Certain reclassifications have been made to prior period financial statements in order to conform to current period presentation. There was no impact to prior period net income for any of the reclassifications.

The results of operations for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2023 as filed with the SEC on February 28, 2024 (our "2023 Annual Report"). These statements have been prepared on a basis that is substantially consistent with the accounting principles applied in our 2023 Annual Report.

Significant Accounting Policies: Investment Property

Investment property is recorded at cost, less accumulated depreciation.

Impairment of long-lived assets - we review the carrying value of long-lived assets to be held for use for impairment quarterly or whenever events or changes in circumstances indicate a possible impairment. Future events could occur which would cause us to conclude that impairment indicators exist, and significant adverse changes in national, regional, or local market conditions or trends may cause us to change the estimates and assumptions used in our impairment analysis. The results of an impairment analysis could be material to our financial statements. Our primary indicator for potential impairment is based on NOI trends period over period. Circumstances that may prompt a test of recoverability may include a significant decrease in the anticipated market price, an adverse change to the extent or manner in which an asset may be used or in its physical condition or other events that may significantly change the value of the long-lived asset. An impairment loss is recognized when a long-lived asset's carrying value is not recoverable and exceeds estimated fair value.

We estimate the fair value of our long-lived assets based on discounted future cash flows and any potential disposition proceeds for a given asset. Forecasting cash flows requires management to make estimates and assumptions about such variables as the estimated holding period, rental rates, occupancy, development and operating expenses during the holding period, as well as capitalization rates. Management uses its best judgment when developing these estimates and assumptions.

Reportable Segments

During the three months ended March 31, 2024, we expanded our organizational structure from three segments, which consisted of (i) manufactured home ("MH") communities, (ii) recreational vehicle ("RV") communities, and (iii) Marinas, to a four-segment structure that now includes (iv) communities in the United Kingdom ("UK"). The new structure reflects how the chief operating decision maker manages the business, makes operating decisions, allocates resources and evaluates operating performance. Beginning with the three months ended March 31, 2024, we are reporting our financial results consistent with our newly realigned operating segments and have recast prior period amounts to conform to the way we internally manage our business and monitor segment performance. Certain reclassifications have been made to the prior period financial statements and related notes in order to conform to the current period presentation. There was no impact to prior period net income, stockholders' equity or cash flows for any of the reclassifications.

6

SUN COMMUNITIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

Restatement of Previously Issued Financial Statements

As disclosed in our 2023 Annual Report, we restated the unaudited financial information as of and for the three months ended March 31, 2023, the three and six months ended June 30, 2023, and the three and nine months ended September 30, 2023 (collectively, the "2023 Interim Financial Statements"). Accordingly, certain prior period balances within our consolidated financial statements and the accompanying footnotes have been restated, where applicable.

In 2022, we acquired a portfolio of holiday park properties located in the United Kingdom, which we refer to as our Park Holidays business, classified within our UK reporting segment. As disclosed in our Current Report on Form 8-K filed with the SEC on February 20, 2024, during the course of management's 2023 year-end procedures, we reviewed the controls relating to the valuation of the Park Holidays business and the associated goodwill at March 31, 2023, June 30, 2023 and September 30, 2023. In connection with that review, we concluded that there were triggering events relevant to the valuation of the Park Holidays business, including reduced financial projections and increases in interest rates, that should have been taken into account when preparing the 2023 Interim Financial Statements. Management undertook a full review of the valuations and determined that at each of March 31, 2023, June 30, 2023 and September 30, 2023, we should have recognized non-cash impairments to goodwill for the Park Holidays business.

For the three months ended March 31, 2023, non-cash goodwill impairment increased Net loss on our Consolidated Statements of Operations by $15.4 million.

2. Revenue

Our revenue consists of real property revenue at our MH, RV, Marina and UK properties, revenue from home sales, revenue from service, retail, dining and entertainment, interest income, and brokerage commissions and other revenue.

The following table disaggregates our revenue by major source and segment (in millions):

	Three Months Ended
	March 31, 2024										March 31, 2023(1)
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Revenues
Real property	$	238.0	$	104.5	$	96.4	$	38.0	$	476.9	$	224.0	$	99.6	$	89.1	$	28.9	$	441.6
Home sales	27.3		5.5		—		36.1		68.9		40.8		6.4		—		39.1		86.3
Service, retail, dining and entertainment	2.6		6.5		104.5		4.3		117.9		2.6		5.8		91.1		2.9		102.4
Interest	3.1		1.4		0.1		—		4.6		10.3		0.9		0.2		—		11.4
Brokerage commissions and other, net	1.0		0.7		1.0		0.3		3.0		3.8		4.7		0.9		0.1		9.5
Total Revenues	$	272.0	$	118.6	$	202.0	$	78.7	$	671.3	$	281.5	$	117.4	$	181.3	$	71.0	$	651.2

(1) Recast to reflect segment changes.

The majority of our revenue is derived from site and home leases, and wet slip and dry storage space leases that are accounted for pursuant to ASC 842, "Leases." We account for all revenue from contracts with customers following ASC 606, "Revenue from Contracts with Customers," except for those that are within the scope of other topics in the FASB ASC. For additional information, refer to Note 1, "Significant Accounting Policies" in our 2023 Annual Report.

7

SUN COMMUNITIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

3. Real Estate Acquisitions and Dispositions

2024 Acquisitions

We did not acquire any operating properties during the three months ended March 31, 2024. During the same period, we entered into a ground lease to support one marina with eight wet slips and dry storage spaces.

2024 Development and Expansion Activities

During the three months ended March 31, 2024, we acquired two land parcels located in the United States ("U.S.") for an aggregate purchase price of $12.9 million. In conjunction with one of the land parcel acquisitions, we issued 4,452 common OP units valued at $0.6 million.

During the three months ended March 31, 2024, we acquired two buildings related to our marinas located in the U.S. for an aggregate purchase price of $13.7 million.

2024 Dispositions

In February 2024, we sold two MH communities located in Arizona and Florida with 533 developed sites for total cash consideration of $51.7 million. The gain from the sale of the properties was $6.2 million and was recorded in Gain / (loss) on dispositions of properties on our Consolidated Statements of Operations.

2023 Acquisitions

For the year ended December 31, 2023, we acquired the following properties:

Property Name(1)	Type	Sites, Wet Slips and Dry Storage Spaces	Development Sites	State, Province or Country	Month Acquired
Fox Run	MH: asset acquisition	68	72	MI	January
Savannah Yacht Center	Marina: asset acquisition	24	—	GA	March
	Total	92	72

(1) Property names are subject to changes subsequent to acquisition.

The following table summarizes the amounts of assets acquired, net of liabilities assumed at the acquisition date and the consideration paid for the acquisitions completed in 2023 (in millions):

	At Acquisition Date										Consideration
	Investment in property		Inventory of manufactured homes, boat parts and retail related items		In-place leases, goodwill and other intangible assets		Other assets / (liabilities), net		Total identifiable assets acquired net of liabilities assumed		Cash and escrow		Temporary and permanent equity(1)		Total consideration
Asset Acquisition(2)
Fox Run(3)	$	7.2	$	—	$	—	$	—	$	7.2	$	2.8	$	4.4	$	7.2
Savannah Yacht Center(4)	100.2		0.1		0.4		4.2		104.9		4.3		100.6		104.9
Total	$	107.4	$	0.1	$	0.4	$	4.2	$	112.1	$	7.1	$	105.0	$	112.1

(1) Refer to Note 10, "Equity and Temporary Equity," for additional detail.

(2) Property names are subject to changes subsequent to acquisition.

(3) In conjunction with the acquisition, the Operating Partnership issued 31,289 common OP units valued at $4.4 million.

(4) In conjunction with the acquisition, the Operating Partnership issued one million Series K preferred OP units valued at $100.6 million.

During the year ended December 31, 2023, we incurred and capitalized $3.1 million of transaction costs, which have been allocated among the various fixed asset categories for purchases that meet the asset acquisition criteria. During the year ended December 31, 2023, we recognized $3.0 million of business combination expenses in connection with transactions completed during 2022.

8

SUN COMMUNITIES, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

2023 Development and Expansion Activities

During the year ended December 31, 2023, we acquired four land parcels located in the U.S. and one land parcel in the United Kingdom for an aggregate purchase price of $35.8 million.

2023 Dispositions

In December 2023, as part of a transaction with our joint venture partners in Sun NG RV Resorts, Sun NG Whitewater RV Resorts LLC, Sun NG Beaver Brook LLC and four standalone affiliates (collectively, "Sun NG"), we disposed of our majority equity interest owned in three consolidated joint venture RV properties with 955 developed sites.

In August 2023, we sold one MH community located in Maine with 155 developed sites at its net carrying value for cash consideration of $6.8 million. The property was previously classified as held for sale during the three months ended June 30, 2023, with its net carrying value of $13.1 million written down by $6.3 million within Asset impairments on our Consolidated Statements of Operations, to a fair value less cost to sell of $6.8 million.

In February 2023, we sold two parcels of land in the United Kingdom for total consideration of $111.5 million. The consideration consisted of $108.8 million in the form of an operator note receivable that was added to an existing facility with a weighted average interest rate of 11.9% per annum, due May 31, 2023 and subsequently extended to July 31, 2023 as part of the operator's total facility. On the date of sale, the carrying value of the note receivable approximated its fair value due to its short term nature. The dispositions resulted in a loss on sale totaling $2.2 million during the year ended December 31, 2023, net of the release of foreign currency translation losses from Accumulated other comprehensive income ("AOCI") of $11.9 million. The total loss on sale was recorded in Gain / (loss) on dispositions of properties on the Consolidated Statements of Operations. As of December 31, 2023, we have reacquired these two parcels of land at fair value as part of the settlement of the related note receivable, with no remeasurement gain or loss recognized. Refer to Note 4, "Notes and Other Receivables," for additional information on the settlement of the notes receivable.

Real Estate Held For Sale - Changes to a Plan of Sale

We periodically classify real estate as "held for sale" after an active program to sell an asset has commenced and when the sale is probable. Subsequent to the classification of assets as held for sale, no further depreciation expense is recorded.

In February 2023, the criteria was met to classify Sandy Bay, an operating MH community in the United Kingdom, with 730 developed sites, as held for sale. Previously, this property had been under contract. At December 31, 2023, the sale contract was no longer in effect, and due to an unexpected change in circumstance related to the counterparty, we reclassified the property as held for use. In accordance with ASC Topic 360, "Property, Plant, and Equipment," we recorded the property at the lower of the carrying amount before the asset was held for sale, adjusted for depreciation and amortization expense that would have been recognized had the asset been continually classified as held for use, and the fair value at the time of the reclassification. During the three months ended December 31, 2023, we recorded depreciation and amortization expense of $1.3 million in conjunction with the reclassification of the property. The following assets and liabilities, which were previously classified as held for sale within Other assets and Other liabilities, respectively, were reclassified as of December 31, 2023: Investment in property, net of $259.0 million, Inventory of manufactured homes of $4.6 million, Other intangible assets of $1.3 million and Other liabilities, net of $55.8 million.

Refer to Note 20, "Subsequent Events," for information regarding acquisitions completed after March 31, 2024.

4. Notes and Other Receivables

The following table sets forth certain information regarding notes and other receivables (in millions):

	March 31, 2024		December 31, 2023
Installment notes receivable on manufactured homes, net	$	38.3	$	19.6
Notes receivable from real estate developers and operators	127.7		134.5
Other receivables, net	303.1		267.5
Total Notes and Other Receivables, net	$	469.1	$	421.6

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Installment Notes Receivable on Manufactured Homes

Installment notes receivable are measured at fair value, using indicative pricing models from third party valuation specialists, in accordance with ASC Topic 820, "Fair Value Measurements and Disclosures." During the three months ended December 31, 2023, we transferred a group of installment notes receivable to an unrelated party. Refer to Note 5, "Collateralized Receivables and Transfers of Financial Assets," for additional details. The balances of installment notes receivable of $38.3 million (gross installment notes receivable of $39.1 million less fair value adjustment of $0.8 million) and $19.6 million (gross installment notes receivable of $20.4 million less fair value adjustment of $0.8 million) as of March 31, 2024 and December 31, 2023, respectively, are secured by manufactured homes. The notes represent financing to purchasers of manufactured homes located in our communities and require monthly principal and interest payments. The notes had a net weighted average interest rate (net of servicing costs) and maturity of 6.6% and 18.2 years as of March 31, 2024, and 6.9% and 17.2 years as of December 31, 2023, respectively. Refer to Note 16, "Fair Value Measurements," for additional details.

Notes Receivable from Real Estate Developers and Operators

Notes receivable from real estate developers and operators are measured at fair value, using indicative pricing models from third party valuation specialists, in accordance with ASC Topic 820, "Fair Value Measurements and Disclosures." Refer to Note 16, "Fair Value Measurements," for additional information.

Note Receivable from a Real Estate Operator

The note receivable from a real estate operator was comprised of a fully drawn loan provided to Royale Holdings Group HoldCo Limited, a real estate development owner and operator in the United Kingdom, and certain other parties, to fund investing and financing activities (the "Note"). The Note was collateralized by a first-priority security interest in three real estate assets and three MH manufacturers in the United Kingdom. As of March 31, 2024, there was no remaining balance due on the note receivable.

After the maturity date of July 31, 2023, the Note became past due. On September 29, 2023, we appointed receivers over the real estate assets. The receivers marketed the real estate assets for sale during the fourth quarter of 2023. Upon completion of the marketing process, on December 28, 2023, we appointed administrators over the real estate assets and acquired such assets through a credit bid. During the fourth quarter, we engaged third party valuation specialists to appraise the real estate assets in accordance with ASC 820. The appraisals were completed using the discounted cash flow method (income approach), with the significant assumptions being development density, estimated absorption rate, home sale price and discount rate. The real estate assets appraised at fair value totaling $263.8 million. The Note balance was reduced by this amount, with an offsetting adjustment to Investment property, net on our Consolidated Balance Sheets as of December 31, 2023.

As of December 31, 2023, the balance remaining on the Note, which was in nonaccrual status, collateralized by a first-priority security interest in three MH manufacturers in the United Kingdom, was adjusted to fair value totaling $10.8 million (gross notes receivable of $114.3 million, inclusive of accrued interest of $10.4 million, less a fair value adjustment of $103.5 million). The note had a weighted average interest rate of 12.5% as of December 31, 2023.

During the three months ended March 31, 2024, we completed a receivership process related to the three MH manufacturers in the United Kingdom. The receivers sold such assets for a total consideration of $10.7 million, resulting in cash proceeds to the Company of $7.0 million, net of non-cash consideration and fees. The sale of these assets resulted in an incremental fair value remeasurement adjustment of $0.8 million that was recorded in Loss on remeasurement of notes receivable on the Consolidated Statements of Operations.

Notes Receivable from Real Estate Developers

Other acquisition and construction loans provided to real estate developers total $127.7 million with a net weighted average interest rate and maturity of 9.3% and 2.6 years as of March 31, 2024, and total $123.7 million with a net weighted average interest rate and maturity of 9.2% and 2.6 years as of December 31, 2023. As of March 31, 2024, the additional acquisition and construction loans provided to real estate developers have $38.3 million of undrawn funds. There were no adjustments to the fair value of notes receivable from real estate developers during the three months ended March 31, 2024 and the year ended December 31, 2023.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Other Receivables, net

Other receivables, net were comprised of amounts due from the following categories (in millions):

	March 31, 2024		December 31, 2023
MH and annual RV residents for rent, utility charges, fees and other pass-through charges, net(1)	$	83.2	$	65.9
Insurance receivables	65.2		77.8
Home sale proceeds	54.8		28.2
Marina customers for storage, service and lease payments, net(2)	52.8		46.8
Other receivables	47.1		48.8
Total Other Receivables, net	$	303.1	$	267.5

(1)Net of allowance of $5.0 million and $4.8 million as of March 31, 2024 and December 31, 2023, respectively.

(2)Net of allowance of $3.1 million and $2.9 million as of March 31, 2024 and December 31, 2023, respectively.

5. Collateralized Receivables and Transfers of Financial Assets

During the three months ended December 31, 2023, we completed a transfer of our installment notes receivable to an unrelated entity and received net cash proceeds of $53.4 million, along with an agreed upon future cash payment of $1.1 million from the third-party servicer, in exchange for relinquishing our right, title and interest in the receivables. We used the proceeds to pay down borrowings outstanding under our senior credit facility. We have no further obligations or rights with respect to the control, management, administration, servicing or collection of the installment notes receivables. However, we are subject to certain recourse provisions requiring us to purchase the underlying manufactured homes collateralizing such notes at a price calculated based on the agreed upon terms, in the event of a note default and subsequent repossession of the home by the unrelated entity. The recourse provisions are considered to be a form of continuing involvement which precluded establishing legal isolation, and therefore these transferred loans do not meet the requirements for sale accounting under ASC 860, "Transfers and Servicing."

The transaction has been accounted for in accordance with ASC 860-30, with the transferred assets classified as Collateralized receivables, net and the cash proceeds received from this transaction classified as Secured borrowings on collateralized receivables within the Consolidated Balance Sheets. We have elected to apply the fair value option to the collateralized receivables and related secured borrowings under ASC 820, "Fair Value Measurements and Disclosures." The balance of collateralized receivables was $56.5 million (gross collateralized receivable of $57.8 million less fair value adjustments of $1.3 million) and $56.2 million (gross collateralized receivable of $59.1 million less fair value adjustments of $2.9 million) as of March 31, 2024 and December 31, 2023, respectively. The balance of secured borrowings on collateralized receivables was $56.1 million (gross secured borrowings of $52.6 million plus fair value adjustments of $3.5 million) and $55.8 million (gross secured borrowings of $53.9 million plus fair value adjustments of $1.9 million) as of March 31, 2024, and December 31, 2023, respectively. The notes represent financing to purchasers of manufactured homes located in our communities and require monthly principal and interest payments. The notes had a net weighted average interest rate and maturity of 8.6% and 13.9 years as of March 31, 2024 and 8.6% and 14.2 years as of December 31, 2023. Refer to Note 16, "Fair Value Measurements," for additional details.

The collateralized receivables earn interest income and the secured borrowings accrue interest expense at the same amount. The amount of interest income and interest expense recognized during the three months ended March 31, 2024 was $1.2 million.

6. Goodwill and Other Intangible Assets

Our intangible assets include goodwill, in-place leases, non-competition agreements, trademarks and trade names, customer relationships, franchise agreements and other intangible assets. These intangible assets are recorded in Goodwill and Other intangible assets, net on the Consolidated Balance Sheets.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Goodwill

The measurement periods for the valuation of assets acquired and liabilities assumed in a business combination end as soon as information on the facts and circumstances that existed as of the acquisition dates becomes available on the earlier of (i) the dates of acquisition, or (ii) 12 months after the acquisition dates. Adjustments in purchase price allocations may require a change in the amounts allocated to goodwill during the periods in which the adjustments are determined. Changes in the carrying amount of goodwill during the three months ended March 31, 2024 by reportable segment were as follows (in millions):

	MH		RV		Marina		UK		Total
Balance as of December 31, 2023(1)	$	—	$	9.5	$	541.5	$	182.0	$	733.0
Currency Translation Adjustment	—		—		—		(1.6)		(1.6)
Balance as of March 31, 2024	$	—	$	9.5	$	541.5	$	180.4	$	731.4
Accumulated impairment losses as of March 31, 2024(2)	$	—	$	—	$	—	$	369.9	$	369.9

(1) Recast to reflect segment changes.

(2) During the three months ended March 31, 2024, we performed a qualitative assessment of our goodwill balance in accordance with ASC 350-20, "Goodwill and Other." We concluded that the fair value of each respective reporting segment was more-likely-than-not greater than its carrying value. Accordingly, there were no goodwill impairment charges recorded during the three months ended March 31, 2024. For the year ended December 31, 2023, we recorded aggregate non-cash impairment charges of $369.9 million within Goodwill impairment on the Consolidated Statements of Operations. The decline in fair value of the UK reporting segment was primarily driven by a higher weighted average cost of capital due to changes in the macroeconomic environment, as well as inflationary pressures in the UK causing a decline in financial projections.

We evaluate goodwill for impairment on an annual basis and at an interim date, if indicators of potential impairment exist. During the three months ended March 31, 2024, we voluntarily changed our annual impairment assessment date from April 1 to October 31 for the UK reporting segment. As the last quantitative impairment test was performed as of December 31, 2023, there will not be more than 12 months that have elapsed between goodwill impairment tests of the UK reporting segment.

The change in measurement date represents a change in method of applying an accounting principle. This change is preferable because it better aligns our goodwill impairment testing procedures with our annual planning process, our fiscal year-end, and with the annual testing for our Marina segment. We continue to monitor each reporting segment for triggering events for purposes of goodwill impairment testing.

The change in accounting principle did not result in any, nor do we expect the change in accounting principle to result in any delay, acceleration or avoidance of an impairment charge.

Other Intangible Assets, net

The gross carrying amounts and accumulated amortization of our intangible assets were as follows (in millions):

		March 31, 2024				December 31, 2023
Other Intangible Asset	Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
In-place leases	2 months - 13 years	$	166.1	$	(147.5)	$	166.0	$	(146.2)
Non-competition agreements	5 years	10.5		(6.7)		10.5		(6.2)
Trademarks and trade names	3 - 15 years	84.6		(13.7)		85.3		(12.3)
Customer relationships	4 - 17 years	131.6		(40.5)		131.6		(37.3)
Franchise agreements and other intangible assets	1 - 27 years	48.4		(15.1)		48.4		(14.3)
Total finite-lived assets		$	441.2	$	(223.5)	$	441.8	$	(216.3)
Indefinite-lived assets - Trademarks and trade names	N/A	141.0		—		141.0		—
Indefinite-lived assets - Other	N/A	3.0		—		3.0		—
Total indefinite-lived assets		$	144.0	$	—	$	144.0	$	—
Total		$	585.2	$	(223.5)	$	585.8	$	(216.3)

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Amortization expenses related to our Other intangible assets were as follows (in millions):

	Three Months Ended
Other Intangible Asset Amortization Expense	March 31, 2024		March 31, 2023
In-place leases	$	1.9	$	3.6
Non-competition agreements	0.5		0.5
Trademarks and trade names	1.4		1.5
Customer relationships	3.2		3.2
Franchise fees and other intangible assets	0.7		0.9
Total	$	7.7	$	9.7

We anticipate amortization expense for Other intangible assets to be as follows for the next five years (in millions):

Other Intangible Asset Future Amortization Expense	Remainder 2024		2025		2026		2027		2028
In-place leases	$	5.1	$	6.1	$	3.9	$	2.3	$	0.9
Non-competition agreements	1.6		2.1		0.1		—		—
Trademarks and trade names	4.3		5.7		5.7		5.4		5.3
Customer relationships	9.5		12.7		12.3		12.2		12.1
Franchise agreements and other intangible assets	2.3		3.0		2.7		2.5		2.5
Total	$	22.8	$	29.6	$	24.7	$	22.4	$	20.8

7. Investments in Nonconsolidated Affiliates

Investments in joint ventures that are not consolidated, nor recorded at cost, are accounted for using the equity method of accounting as prescribed in ASC Topic 323, "Investments - Equity Method and Joint Ventures." Investments in nonconsolidated affiliates are recorded within Other assets, net on the Consolidated Balance Sheets. Equity income and loss are recorded in Income / (loss) from nonconsolidated affiliates on the Consolidated Statements of Operations.

Sungenia Joint Venture ("Sungenia JV")

At March 31, 2024 and December 31, 2023, we had a 50.0% ownership interest in Sungenia JV, a joint venture formed between us and Ingenia Communities Group (ASX:INA) ("Ingenia") in November 2018, to establish and grow a manufactured housing community development program in Australia.

GTSC LLC ("GTSC")

At March 31, 2024 and December 31, 2023, we had a 40.0% ownership interest in GTSC, which engages in acquiring, holding and selling loans secured, directly or indirectly, by manufactured homes located in our communities.

SV Lift, LLC ("SV Lift")

At March 31, 2024 and December 31, 2023, we had a 50.0% ownership interest in SV Lift, which owns, operates and leases an aircraft.

The investment balance in each nonconsolidated affiliate was as follows (in millions):

Investment	March 31, 2024		December 31, 2023
Investment in Sungenia JV	$	60.6	$	56.8
Investment in GTSC	60.3		60.4
Investment in SV Lift	1.5		1.7
Total	$	122.4	$	118.9

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

The income / (loss) from each nonconsolidated affiliate is as follows (in millions):

	Three Months Ended
Income / (loss) from Nonconsolidated Affiliates	March 31, 2024		March 31, 2023
RezPlot Systems LLC equity loss(1)	$	—	$	(1.5)
Sungenia JV equity income	0.9		0.6
GTSC equity income	0.9		1.0
SV Lift equity loss	(0.4)		(0.3)
Total Income / (Loss) from Nonconsolidated Affiliates	$	1.4	$	(0.2)

(1) Represents an RV reservation software technology company, operating under the Campspot brand, which we acquired in January 2019 and disposed of our ownership interest in December 2023.

The change in the Sungenia JV investment balance is as follows (in millions):

	Three Months Ended		Year Ended
	March 31, 2024		December 31, 2023
Beginning balance	$	56.8	$	44.5
Cumulative translation adjustment	(1.0)		(0.5)
Contributions	3.9		9.6
Equity earnings	0.9		3.2
Ending Balance	$	60.6	$	56.8

The change in the GTSC investment balance is as follows (in millions):

	Three Months Ended		Year Ended
	March 31, 2024		December 31, 2023
Beginning balance	$	60.4	$	54.5
Contributions	0.2		27.5
Distributions	(6.4)		(20.7)
Equity earnings	0.9		3.3
Fair value adjustment	5.2		(4.2)
Ending Balance	$	60.3	$	60.4

8. Consolidated Variable Interest Entities

The Operating Partnership

We consolidate the Operating Partnership under the guidance set forth in ASC 810, "Consolidation." We evaluated whether the Operating Partnership met the criteria for classification as a variable interest entity ("VIE") or, alternatively, as a voting interest entity and concluded that the Operating Partnership met the criteria of a VIE. Our significant asset is our investment in the Operating Partnership, and consequently, substantially all of our assets and liabilities represent those assets and liabilities of the Operating Partnership. We are the sole general partner and generally have the power to manage and have complete control over the Operating Partnership and the obligation to absorb its losses or the right to receive its benefits.

Other Consolidated VIEs

We consolidate Sun NG Cisco Grove RV LLC, Sun NG Coyote Ranch RV LLC, Sun NG Kittatinny RV LLC, Sun NG River Beach LLC, Sun NG Beaver Brook LLC, FPG Sun Menifee 80 LLC, Solar Energy Project LLC, Solar Energy Project CA II LLC, Solar Energy Project III LLC and FPG Sun Moreno Valley 66 LLC under the guidance set forth in ASC 810, "Consolidation." We concluded that each entity is a VIE where we are the primary beneficiary, as we have the power to direct the significant activities of and absorb the significant losses and receive the significant benefits from each entity. Refer to Note 10, "Equity and Temporary Equity," for additional information on consolidated VIEs.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Sun NG Cisco Grove RV LLC, Sun NG Coyote Ranch RV LLC, Sun NG Kittatinny RV LLC and Sun NG River Beach RV LLC were formed in December 2023 to engage in the sourcing, due diligence, acquisition, management, construction, leasing and disposition of certain RV parks and resorts. The table below shows their respective ownership percentages, representing the common equity interests:

	Sun NG LLC		Third Party Interest
Sun NG Cisco Grove RV LLC	94.8	%	5.2	%
Sun NG Coyote Ranch RV LLC	96.0	%	4.0	%
Sun NG Kittatinny RV LLC	95.9	%	4.1	%
Sun NG River Beach RV LLC	95.9	%	4.1	%

Sun NG Beaver Brook RV LLC was formed during the three months ended September 30, 2022. The purpose of the company is to engage in the sourcing, due diligence, acquisition, management, construction, leasing and disposition of a recreational vehicle park and resort. The Company's ownership percentages were split between Sun NG LLC and NG Beaver Brook, LLC in the ratio of 70% and 30%, representing common equity interests. In December 2023, the terms were amended which resulted in the Company ownership percentages split between Sun NG LLC and NG Beaver Brook, LLC changing to a ratio of 98.4% and 1.6%, respectively, representing the common equity interests.

The following table summarizes the assets and liabilities of our consolidated VIEs after eliminations, with the exception of the Operating Partnership, included in our Consolidated Balance Sheets (in millions):

	March 31, 2024		December 31, 2023
Assets
Investment property, net	$	136.4	$	132.3
Cash, cash equivalents and restricted cash	3.5		2.9
Other intangible assets, net	0.1		0.1
Other assets, net	0.4		0.4
Total Assets	$	140.4	$	135.7
Liabilities and Other Equity
Secured debt	$	3.2	$	3.2
Advanced reservation deposits and rent	0.9		0.4
Accrued expenses and accounts payable	24.0		24.1
Total Liabilities	28.1		27.7
Temporary equity	10.9		10.7
Total Liabilities and Other Equity	$	39.0	$	38.4

Total assets related to the consolidated VIEs, with the exception of the Operating Partnership, comprised 0.8% of our consolidated total assets at March 31, 2024 and December 31, 2023. Total liabilities comprised 0.3% of our consolidated total liabilities at March 31, 2024 and December 31, 2023. Equity Interests and Noncontrolling interests related to the consolidated VIEs, on an absolute basis, comprised less than 1.0% of our consolidated total equity at March 31, 2024 and December 31, 2023.

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(Unaudited)

9. Debt and Line of Credit

The following table sets forth certain information regarding debt, including premiums, discounts and deferred financing costs (in millions, except for statistical information):

	Carrying Amount				Weighted Average Years to Maturity		Weighted Average Interest Rates
	March 31, 2024		December 31, 2023		March 31, 2024	December 31, 2023	March 31, 2024		December 31, 2023
Secured Debt
Mortgage loans payable(1)	$	3,465.5	$	3,478.9	8.9	9.2	3.995	%	3.994	%
Secured borrowings on collateralized receivables(2)	56.1		55.8		13.9	14.2	8.559	%	8.556	%
Total Secured Debt	$	3,521.6	$	3,534.7
Unsecured Debt
Senior unsecured notes(3)	2,673.7		2,177.5		6.8	7.5	3.778	%	3.375	%
Line of credit and other debt(4)	1,676.7		2,065.1		2.0	1.7	5.186	%	5.428	%
Total Unsecured Debt	4,350.4		4,242.6
Total Debt	$	7,872.0	$	7,777.3	6.8	6.8	4.207	%	4.234	%

(1) Balances at March 31, 2024 and December 31, 2023 include zero net debt premium, as of each such date, and $16.2 million and $16.9 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

(2) Balances at March 31, 2024 and December 31, 2023 include fair value adjustments of $3.5 million and $1.9 million, respectively.

(3) Balances at March 31, 2024 and December 31, 2023 include $6.9 million and $6.5 million of net debt discount, respectively, and $19.4 million and $16.0 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

(4) Balances at March 31, 2024 and December 31, 2023 include zero and $1.6 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

Secured Debt

Mortgage term loans

During the three months ended March 31, 2024 and the year ended December 31, 2023, no mortgage term loans were repaid.

During the three months ended March 31, 2024 we did not enter into any mortgage term loans. During the year ended December 31, 2023, we entered into the following mortgage term loans during the quarters presented below (in millions, except for statistical information):

Period	Loan Amount			Term (in years)	Interest Rate		Maturity Date
Three months ended December 31, 2023	$	252.8	(1)	7	6.49	%	November 1, 2030
Three months ended March 31, 2023	$	85.0	(2)	3	5.0	%	February 13, 2026
	$	99.1	(3)	7 - 10	5.72	%	April 1, 2030 - April 1, 2033

(1)Includes two newly encumbered properties.

(2)Includes five existing encumbered properties.

(3)Includes 22 existing encumbered properties.

The mortgage term loans, which total $3.5 billion as of March 31, 2024, are secured by 156 properties comprised of 62,848 sites representing approximately $2.7 billion of net book value.

Secured Borrowings on Collateralized Receivables

Refer to Note 5, "Collateralized Receivables and Transfers of Financial Assets," for information on Secured Borrowings on Collateralized Receivables.

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(Unaudited)

Unsecured Debt

Senior Unsecured Notes

The following table sets forth certain information regarding our outstanding senior unsecured notes (in millions, except for statistical information). All senior unsecured notes include interest payments on a semi-annual basis in arrears, and are recorded within the Unsecured debt line item on the Consolidated Balance Sheets.

			Carrying Amount
	Principal Amount		March 31, 2024		December 31, 2023
5.5% notes, issued in January 2024 and due in January 2029(1)	$	500.0	$	495.6	$	—
5.7% notes, issued in January 2023 and due in January 2033	400.0		395.8		395.7
4.2% notes, issued in April 2022 and due in April 2032	600.0		592.7		592.6
2.3% notes, issued in October 2021 and due in November 2028	450.0		447.0		446.8
2.7% notes, issued in June 2021 and October 2021, and due in July 2031	750.0		742.6		742.4
Total	$	2,700.0	$	2,673.7	$	2,177.5

(1) In January 2024, the Operating Partnership issued $500.0 million of senior unsecured notes with an interest rate of 5.5% and a five-year term, due January 15, 2029 (the "2029 Notes"). Interest on the 2029 Notes is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2024. The net proceeds from the offering were $495.4 million, after deducting underwriters' discounts and estimated offering expenses. We used the majority of the net proceeds to repay borrowings outstanding under our Senior Credit Facility.

Line of Credit

The Operating Partnership (as borrower), SUI (as guarantor), and certain lenders are parties to a credit agreement which governs our senior credit facility (the "Senior Credit Facility").

Prior to March 2024, the aggregate amount of our Senior Credit Facility was $4.2 billion with the ability to upsize the total borrowings by an additional $800.0 million, subject to certain conditions. The aggregate amount under the Senior Credit Facility consisted of the following: (a) a revolving loan in an amount up to $3.05 billion and (b) a term loan facility of $1.15 billion, with the ability to draw funds from the combined facilities in U.S. dollars, Pound sterling, Euros, Canadian dollars and Australian dollars, subject to certain limitations. The maturity date of the revolving term loan facility is April 7, 2026. At our option that maturity date may be extended two additional six-month periods. The maturity date of the term loan facility was April 7, 2025.

In March 2024, we terminated the term loan facility and settled the associated $1.1 billion of borrowings outstanding under the term loan by increasing our borrowings under the revolving loan of the Senior Credit Facility. Subsequent to the termination of the term loan, our aggregate borrowing capacity under the Senior Credit Facility was reduced to the original capacity under the revolving loan of $3.05 billion. During the three months ended March 31, 2024, we recognized a Loss on extinguishment of debt in our Consolidated Statements of Operations of $0.6 million related to the termination of the term loan facility.

The Senior Credit Facility bears interest at a floating rate based on the Adjusted Term Secured Overnight Financing Rate ("SOFR"), the Adjusted Eurocurrency Rate, the Australian Bank Bill Swap Bid Rate ("BBSY"), the Daily Sterling Overnight Index Average ("SONIA") Rate or the Canadian Dollar Offered Rate, as applicable, plus a margin, in all cases, which can range from 0.725% to 1.6%, subject to certain adjustments. As of March 31, 2024, the margins based on our credit ratings were 0.85% on the revolving loan facility.

At the lenders' option, the Senior Credit Facility will become immediately due and payable upon an event of default under the Credit Facility Agreement. We had $1.7 billion and $944.1 million of borrowings outstanding under the revolving loan as of March 31, 2024 and December 31, 2023, respectively. We also had zero and $1.1 billion of borrowings outstanding under the term loan on the Senior Credit Facility as of March 31, 2024 and December 31, 2023, respectively. These balances are recorded in Unsecured debt on the Consolidated Balance Sheets.

The Senior Credit Facility provides us with the ability to issue letters of credit. Our issuance of letters of credit does not increase our borrowings outstanding under the Senior Credit Facility, but does reduce the borrowing amount available. We had $11.2 million and $26.2 million of outstanding letters of credit at March 31, 2024 and December 31, 2023, respectively.

17

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Unsecured Term Loan

In October 2019, we assumed a $58.0 million secured term loan facility related to an acquisition. The term loan initially had a four-year term ending October 29, 2023, and bore interest at a floating rate based on the Eurodollar rate or Prime rate plus a margin ranging from 1.2% to 2.05%. Effective July 1, 2021, we amended the agreement to release the associated collateral, extend the term loan facility maturity date to October 29, 2025 and adjust the interest rate margin to a range from 0.8% to 1.6%. In August 2022, we amended the secured term loan facility to transition from the Eurodollar rate to SOFR. As of March 31, 2024, the margin based on our credit rating was 0.95%. The outstanding balance was $3.9 million and $7.8 million at March 31, 2024 and December 31, 2023, respectively. These balances are recorded in Unsecured debt on the Consolidated Balance Sheets.

Covenants

The mortgage term loans, senior unsecured notes and Senior Credit Facility are subject to various financial and other covenants. The most restrictive covenants are pursuant to (a) the terms of the Senior Credit Facility, which contains a maximum leverage ratio, minimum fixed charge coverage ratio and maximum secured leverage ratio, and (b) the terms of the senior unsecured notes, which contain a total debt to total assets ratio, secured debt to total assets ratio, consolidated income available for debt service to debt service ratio and unencumbered total asset value to unsecured debt ratio. At March 31, 2024, we were in compliance with all financial covenants.

In addition, certain of our subsidiary borrowers own properties that secure loans. These subsidiaries are consolidated within our accompanying Consolidated Financial Statements, however, each of these subsidiaries' assets and credit are not available to satisfy our debts and other obligations, and any of our other subsidiaries or any other person or entity.

Interest Capitalized

We capitalize interest during the construction and development of our communities. Capitalized interest costs associated with construction and development activities during the three months ended March 31, 2024 and 2023 were as follows (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Interest capitalized	$	2.7	$	2.5

18

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

10. Equity and Temporary Equity

Temporary Equity

Redeemable Preferred OP Units

Temporary equity includes preferred securities that are redeemable for cash at the holder's option or upon the occurrence of an event that is not solely within our control based on a fixed or determinable price. These securities are not mandatorily redeemable for cash nor do they contain a fixed maturity date. The following table sets forth the various series of redeemable preferred OP units that were outstanding as of March 31, 2024 and December 31, 2023 and the related terms, and summarizes the balance included within Temporary Equity on our Consolidated Balance Sheets (in millions, except for statistical information):

Description	OP Units Outstanding	Exchange Rate(1)	Annual Distribution Rate(2)		Cash Redemption(3)	Redemption Period	Carrying Amount
	March 31, 2024						March 31, 2024		December 31, 2023
Series D preferred OP units	488,958	0.8000	4.0	%	Holder's Option	Any time	$	47.3	$	46.9
Series F preferred OP units	90,000	0.6250	3.0	%	Holder's Option	Any time after earlier of May 14, 2025 or death of holder	8.5		8.5
Series G preferred OP units	205,812	0.6452	3.2	%	Holder's Option	Any time after earlier of September 30, 2025 or death of holder	19.8		20.4
Series H preferred OP units	581,229	0.6098	3.0	%	Holder's Option	Any time after earlier of October 30, 2025 or death of holder	54.9		55.0
Series J preferred OP units	238,000	0.6061	2.85	%	Holder's Option	During the 30-day period following a change of control of the Company or any time after April 21, 2026	22.6		22.7
Series K preferred OP units	1,000,000	0.5882	4.0	%	Holder's Option	Within 60 days after March 23, 2028	95.7		96.7
Total	2,603,999						$	248.8	$	250.2

(1) Exchange rates are subject to adjustment upon stock splits, recapitalizations and similar events. The exchange rates of certain series of OP units are approximated to four decimal places.

(2) Distributions are payable on the issue price of each OP unit, which is $100.00 per unit for all these preferred OP units.

(3) The redemption price for each preferred OP unit redeemed will be equal to its issue price plus all accrued but unpaid distributions.

Redeemable Equity Interests

The following table summarizes the redeemable equity interests included in Temporary Equity on our Consolidated Balance Sheets (in millions):

		Carrying Amount
Equity Interest	Description	March 31, 2024		December 31, 2023
Solar Energy Project CA II LLC	A joint venture that operates and maintains solar energy equipment in select California communities	$	5.2	$	5.1
Solar Energy Project LLC	A joint venture that operates and maintains solar energy equipment in select California communities	2.3		2.3
Solar Energy Project III LLC	A joint venture that operates and maintains solar energy equipment in select Arizona and California communities	2.4		2.3
Other stand-alone joint ventures(1)	In connection with investments in land for future development and joint ventures that operate portfolios of RV communities in the U.S.	1.0		1.0
Total		$	10.9	$	10.7

(1) Refer to Note 8, "Consolidated Variable Interest Entities," for more information on the consolidated VIEs.

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(Unaudited)

Permanent Equity

Universal Shelf Registration Statement

In March 2024, we filed a new universal shelf registration statement on Form S-3 with the SEC. The shelf registration statement was deemed automatically effective and provides for the registration of unspecified amounts of equity and debt securities. The authorized number of shares of our capital stock is 380,000,000 shares, of which 360,000,000 shares are common stock and 20,000,000 shares are preferred stock. As of March 31, 2024, we had 124,641,861 shares of common stock issued and outstanding and no shares of preferred stock were issued and outstanding.

At the Market Offering Sales Agreement

We have entered into an At the Market Offering Sales Agreement with certain sales agents and forward sellers pursuant to which we may sell, from time to time, up to an aggregate gross sales price of $1.25 billion of our common stock (the "ATM"), through the sales agents, acting as our sales agents or, if applicable, as forward sellers, or directly to the sales agents as principals for their own accounts. The sales agents and forward sellers are entitled to compensation in an agreed amount not to exceed 2.0% of the gross price per share for any shares sold under the ATM. Through March 31, 2024, we had entered into forward sales agreements under the ATM for an aggregate gross sales price of $160.6 million.

Issuances of Common OP Units in Connection with the Acquisition of Certain Properties

Three Months Ended March 31, 2024 and 2023	Common OP Units Issued	Value at Issuance (in millions)		Related Acquisition
March 2024	4,452	$	0.6	Land for development
January 2023	31,289	$	4.4	Fox Run

Accumulated Other Comprehensive Income

AOCI attributable to SUI common shareholders is separately presented on our Consolidated Balance Sheets as a component of total SUI shareholders' equity. Other Comprehensive Income ("OCI") attributable to noncontrolling interests is allocated to, and included within, Noncontrolling interests on our Consolidated Balance Sheets. Refer to the Statements of Comprehensive Loss for complete details related to OCI activity in the reporting period.

AOCI attributable to SUI common shareholders consisted of the following, net of tax (in millions):

	March 31, 2024		December 31, 2023
Net foreign currency translation losses	$	(38.7)	$	(29.5)
Accumulated net gains on derivatives	45.4		41.7
Accumulated other comprehensive income	$	6.7	$	12.2

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Noncontrolling Interests - Common and Preferred OP Units

The following table summarizes the common and preferred OP units included within Noncontrolling interests on our Consolidated Balance Sheets (in millions, except for shares and statistical information):

Description	OP Units Outstanding	Exchange Rate(1)	Annual Distribution Rate(2)		Cash Redemption	Redemption Period	Carrying Amount
	March 31, 2024						March 31, 2024		December 31, 2023
Common OP units	2,683,654	1.0000	Same distribution rate for common stock		N/A	N/A	$	42.8	$	46.5
Series A-1 preferred OP units	191,812	2.4390	6.0	%	N/A	N/A	10.5		11.5
Series A-3 preferred OP units	40,268	1.8605	4.5	%	N/A	N/A	2.4		2.4
Series C preferred OP units	305,748	1.1100	5.0	%	N/A	N/A	20.9		21.4
Series E preferred OP units	80,000	0.6897	5.5	%	N/A	N/A	6.3		6.4
Series L preferred OP units	20,000	0.6250	3.5	%	N/A	N/A	2.0		2.0
Total	3,321,482						$	84.9	$	90.2

(1) Exchange rates are subject to adjustment upon stock splits, recapitalizations and similar events. The exchange rates of certain series of OP units are approximated to four decimal places.

(2) Distributions are payable on the issue price of each OP unit which is $100.00 per unit for all these preferred OP units.

Conversions

Conversions to Common Stock and Common OP Units - Subject to certain limitations, holders can convert certain series of OP units to shares of our common stock and to common OP units at any time. Below is the activity of conversions during the three months ended March 31, 2024 and 2023:

		Three Months Ended
		March 31, 2024		March 31, 2023
Series	Conversion Rate	Units / Shares Converted	Common Stock(1)	Units / Shares Converted	Common Stock(1)
Aspen preferred OP units	Various	—	—	270,000	86,224
Common OP units	1.0000	55,781	55,781	2,910	2,910
Series A-1 preferred OP units	2.4390	10,332	25,195	—	—
Series C preferred OP units	1.1100	100	111	65	72
Series G preferred OP units	0.6452	4,898	3,160	1,000	645
Series H preferred OP units	0.6098	9	5	25	15
Series J preferred OP units	0.6061	—	—	1,000	606

(1)Calculation may yield minor differences due to rounding incorporated in the above numbers.

Distributions

Distributions declared for the three months ended March 31, 2024 were as follows:

Common Stock, Common OP units and Restricted Stock Distributions	Record Date	Payment Date	Distribution Per Share		Total Distribution (in Millions)
March 31, 2024	3/29/2024	4/15/2024	$	0.94	$	119.7

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(Unaudited)

11. Share-Based Compensation

As of March 31, 2024, we had two share-based compensation plans: the Sun Communities, Inc. 2015 Equity Incentive Plan (as amended, the "2015 Equity Incentive Plan") and the First Amended and Restated 2004 Non-Employee Director Option Plan (as amended, the "2004 Non-Employee Director Option Plan"). We believe granting equity awards will provide certain executives, key employees and directors additional incentives to promote our financial success and promote employee and director retention by providing an opportunity to acquire or increase the direct proprietary interest of those individuals in our operations and future. Time based awards for directors generally vest over three years. Time based awards for key employees and executives generally vest over five years. Market condition awards for executives generally vest after three years.

During the three months ended March 31, 2024 and 2023, shares were granted as follows:

Grant Period	Type	Plan	Shares Granted	Grant Date Fair Value Per Share			Vesting Type
2024	Key Employees	2015 Equity Incentive Plan	205,540	$	132.10	(1)	Time Based
2024	Executive Officers	2015 Equity Incentive Plan	31,800	$	132.13	(1)	Time Based
2024	Executive Officers	2015 Equity Incentive Plan	41,400	$	98.14	(2)	Market Condition	(3)
2024	Directors	2004 Non-Employee Director Option Plan	20,000	$	129.47	(1)	Time Based	(4)
2023	Key Employees	2015 Equity Incentive Plan	220,258	$	137.16	(1)	Time Based
2023	Executive Officers	2015 Equity Incentive Plan	62,800	$	144.88	(1)	Time Based
2023	Executive Officers	2015 Equity Incentive Plan	82,200	$	108.60	(2)	Market Condition	(3)
2023	Directors	2004 Non-Employee Director Option Plan	16,000	$	148.12	(1)	Time Based	(5)

(1)Represents the weighted average fair value per share of the closing price of our common stock on the dates the shares were awarded.

(2)Represents the weighted average fair value per share of the Monte Carlo simulation fair value price of our market condition awards on the dates the shares were awarded.

(3)Share-based compensation for restricted stock awards with market conditions is measured based on shares expected to vest using a Monte Carlo simulation to determine fair value.

(4)Includes 6,000 shares that were deferred under the 2021 Non-Employee Directors Deferred Compensation Plan and are issuable on future dates.

(5)Includes 2,000 shares that were deferred under the 2021 Non-Employee Directors Deferred Compensation Plan and are issuable on future dates.

The vesting requirements for 166,304 and 203,898 restricted shares granted to our executives, directors and employees were satisfied during the three months ended March 31, 2024 and 2023, respectively.

We capitalize a portion of share-based compensation costs for employees who work directly on construction and development of our communities. We recognized the following share-based compensation costs (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Share-based compensation - expensed(1)	$	10.1	$	9.6
Share-based compensation - capitalized(2)	$	0.4	$	0.7

(1) Recorded within General and administrative expense on the Consolidated Income Statements.

(2) Capitalized to Land improvements and buildings on the Consolidated Balance Sheets.

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(Unaudited)

12. Segment Reporting

ASC Topic 280, "Segment Reporting," establishes standards for the way that business enterprises report information about operating segments in its financial statements. As described in Note 1, "Basis of Presentation," effective January 1, 2024, we expanded our organizational structure from three segments, which consisted of (i) manufactured home ("MH") communities, (ii) recreational vehicle ("RV") communities, and (iii) Marinas to add a fourth segment that includes communities in the United Kingdom ("UK"). The new structure reflects how the chief operating decision maker manages the business, makes operating decisions, allocates resources and evaluates operating performance. Beginning with the three months ended March 31, 2024, we are reporting our financial results consistent with our newly realigned operating segments and have recast prior period amounts to conform to the way we internally manage our business and monitor segment performance. Certain reclassifications have been made to the prior period financial statements and related notes in order to conform to the current period presentation. There was no impact to prior period net income, stockholders' equity or cash flows for any of the reclassifications.

Our four reportable segments are: (i) MH, (ii) RV, (iii) Marina and (iv) UK.

The MH segment owns, operates, develops, or has an interest in, a portfolio of MH communities in the U.S., and is in the business of acquiring, operating and developing ground-up MH communities to provide affordable housing solutions to residents. The MH segment in the U.S. also provides manufactured home sales and leasing services to tenants and prospective tenants of our communities.

The RV segment owns, operates, develops, or has an interest in, a portfolio of RV communities and is in the business of acquiring, operating and developing ground-up RV communities in the U.S. and Canada. It also provides leasing services for vacation rentals within the RV communities.

The Marina segment owns, operates and develops marinas, and is in the business of acquiring and operating marinas in the U.S., with the majority of such marinas concentrated in coastal regions, and others located in various inland regions.

The UK segment owns, operates, develops, or has an interest in, a portfolio of communities, referred to as holiday parks, and is in the business of acquiring, operating and developing communities in the United Kingdom. It also provides home sales and associated site license activities to owners and tenants within the communities.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

A presentation of segment financial information is summarized as follows (in millions):

	Three Months Ended
	March 31, 2024										March 31, 2023
											As Restated
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Operating revenues	$	267.9	$	116.5	$	200.9	$	78.4	$	663.7	$	267.4	$	111.8	$	180.2	$	70.9	$	630.3
Operating expenses / Cost of sales	100.5		64.0		139.3		55.0		358.8		107.1		66.5		121.3		54.8		349.7
NOI	$	167.4	$	52.5	$	61.6	$	23.4	$	304.9	$	160.3	$	45.3	$	58.9	$	16.1	$	280.6
Adjustments to arrive at net income
Interest income									4.6										11.4
Brokerage commissions and other revenues, net									3.0										9.5
General and administrative expense									(78.5)										(64.1)
Catastrophic event-related charges, net									(7.2)										(1.0)
Business combination expense, net									—										(2.8)
Depreciation and amortization									(165.3)										(155.6)
Asset impairments									(20.7)										(2.4)
Goodwill impairment									—										(15.4)
Loss on extinguishment of debt (see Note 9)									(0.6)										—
Interest expense									(89.7)										(76.6)
Interest on mandatorily redeemable preferred OP units / equity									—										(1.0)
Loss on remeasurement of marketable securities									—										(19.9)
Gain / (loss) on foreign currency exchanges									1.1										(2.7)
Gain / (loss) on dispositions of properties									5.4										(1.6)
Other income / (expense), net									8.0										(1.0)
Loss on remeasurement of notes receivable									(0.7)										(1.7)
Income / (loss) from nonconsolidated affiliates (see Note 7)									1.4										(0.2)
Gain / (loss) on remeasurement of investment in nonconsolidated affiliates									5.2										(4.5)
Current tax expense									(2.1)										(3.9)
Deferred tax benefit									5.7										4.6
Net Loss									(25.5)										(48.3)
Less: Preferred return to preferred OP units / equity interests									3.2										2.4
Less: Loss attributable to noncontrolling interests									(1.3)										(5.8)
Net Loss Attributable to SUI Common Shareholders									$	(27.4)									$	(44.9)

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

	March 31, 2024										December 31, 2023(1)
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Identifiable Assets
Investment property, net	$	5,267.9	$	3,699.2	$	3,257.6	$	2,233.2	$	14,457.9	$	5,317.4	$	3,718.8	$	3,214.5	$	2,192.9	$	14,443.6
Cash, cash equivalents and restricted cash	71.1		36.9		16.2		8.3		132.5		20.1		11.8		6.4		4.4		42.7
Inventory of manufactured homes	94.4		24.3		—		72.3		191.0		103.1		24.3		—		78.2		205.6
Notes and other receivables, net	211.7		157.7		60.4		39.3		469.1		159.1		119.7		54.3		88.5		421.6
Collateralized receivables, net	56.5		—		—		—		56.5		56.2		—		—		—		56.2
Goodwill	—		9.5		541.5		180.4		731.4		—		9.5		541.5		182.0		733.0
Other intangible assets, net	13.1		28.3		248.5		71.8		361.7		14.3		29.0		252.2		74.0		369.5
Other assets, net	269.0		51.9		250.4		141.9		713.2		271.0		47.6		240.7		109.2		668.5
Total Assets	$	5,983.7	$	4,007.8	$	4,374.6	$	2,747.2	$	17,113.3	$	5,941.2	$	3,960.7	$	4,309.6	$	2,729.2	$	16,940.7

(1) Recast to reflect segment changes.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

13. Income Taxes

We have elected to be taxed as a real estate investment trust ("REIT") pursuant to Section 856(c) of the Internal Revenue Code of 1986, as amended ("Code"). In order for us to qualify as a REIT, at least 95% of our gross income in any year must be derived from qualifying sources. In addition, a REIT must distribute annually at least 90% of its REIT taxable income (calculated without any deduction for dividends paid and excluding capital gains) to its shareholders and meet other tests.

Qualification as a REIT involves the satisfaction of numerous requirements (on an annual and quarterly basis) established under highly technical and complex Code provisions for which there are limited judicial or administrative interpretations and involves the determination of various factual matters and circumstances not entirely within our control. In addition, frequent changes occur in the area of REIT taxation, which requires us to continually monitor our tax status. We analyzed the various REIT tests and confirmed that we continued to qualify as a REIT during the three months ended March 31, 2024.

As a REIT, we generally will not be subject to U.S. federal income taxes at the corporate level on the ordinary taxable income we distribute to our shareholders as dividends. If we fail to qualify as a REIT in any taxable year, our taxable income could be subject to U.S. federal income tax at regular corporate rates. Even if we qualify as a REIT, we may be subject to certain state and local income taxes, as well as U.S. federal income and excise taxes on our undistributed income. In addition, taxable income from non-REIT activities managed through taxable REIT subsidiaries is subject to federal, state and local income taxes. We are also subject to local income taxes in Canada, Puerto Rico and the United Kingdom due to certain properties located in those jurisdictions. We do not provide for withholding taxes on our undistributed earnings from our Canadian subsidiaries as they are reinvested and will continue to be reinvested indefinitely outside of the U.S. As currently structured, we are not subject to United Kingdom withholding taxes on distributions from our United Kingdom properties.

Deferred tax assets and liabilities reflect the impact of temporary differences between the amounts of assets and liabilities for financial reporting purposes and the basis of such assets and liabilities as measured by tax laws. Deferred tax assets are reduced, if necessary, by a valuation allowance to the amount where realization is more likely than not assured after considering all available evidence. Our temporary differences primarily relate to net operating loss carryforwards, depreciation, interest and basis differences between tax and GAAP. Our deferred tax assets that have a full valuation allowance relate to our taxable REIT subsidiaries. As of March 31, 2024, we had $309.1 million of net deferred tax liabilities, comprised of deferred tax assets, net of valuation allowance of $61.9 million, and deferred tax liabilities of $371.0 million. The deferred tax liability balance is comprised primarily of basis differences in our foreign investment in properties in the United Kingdom and Canada. As of December 31, 2023, we had $277.1 million of net deferred tax liabilities, comprised of deferred tax assets, net of valuation allowance of $58.1 million, and deferred tax liabilities of $335.2 million. The net deferred tax assets and deferred tax liabilities are recorded within Other assets and Other liabilities, respectively, on our Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023.

We had no unrecognized tax benefits as of March 31, 2024 and 2023. We do not expect significant changes in tax positions that would result in unrecognized tax benefits within one year of March 31, 2024.

For the three months ended March 31, 2024, we recorded current tax expense for federal, state, Canadian, Puerto Rican, and United Kingdom income taxes totaling $2.1 million. For the three months ended March 31, 2023, we recorded current tax expense for federal, state, Canadian, Puerto Rican, and United Kingdom income taxes and Australian withholding taxes totaling $3.9 million.

For the three months ended March 31, 2024 and 2023, we recorded a deferred tax benefit of $5.7 million and $4.6 million, respectively.

26

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

14. Loss Per Share

Loss per share ("EPS") is computed by dividing net loss by the weighted average number of common shares outstanding during the period on a basic and diluted basis. We calculate diluted EPS using the more dilutive of the treasury stock method and the two-class method for stock option and restricted common shares, the treasury stock method for forward equity sales and the if converted method for convertible units.

From time to time, we enter into forward equity sales agreements, which are discussed in Note 10, "Equity and Temporary Equity." We considered the potential dilution resulting from the forward equity sales agreements on the EPS calculations. At inception, the agreements do not have an effect on the computation of basic EPS as no shares are delivered unless there is a physical settlement. Common shares issued upon the physical settlement of the forward equity sales agreements, weighted for the period these common shares are outstanding, are included in the denominator of basic EPS. To determine the dilution resulting from the forward equity sales agreements during the period of time prior to settlement, we calculate the number of weighted-average shares outstanding - diluted in accordance with the treasury stock method.

Our potentially dilutive securities include our potential common shares related to our forward equity offerings, our unvested restricted common shares, and our Operating Partnership outstanding common OP units, Series A-1 preferred OP units, Series A-3 preferred OP units, Series C preferred OP units, Series D preferred OP units, Series E preferred OP units, Series F preferred OP units, Series G preferred OP units, Series H preferred OP units, Series J preferred OP units, Series K preferred OP units, and Series L preferred OP units, which, if converted or exercised, may impact dilution.

Diluted EPS considers the impact of potentially dilutive securities except when the potential common shares have an anti-dilutive effect. Our unvested restricted stock common shares contain rights to receive non-forfeitable distributions and participate equally with common stock with respect to distributions issued or declared, and thus, are participating securities, requiring the two-class method of computing EPS. In calculating the two-class method, undistributed earnings are allocated to both common shares and participating securities based on the weighted average number of shares outstanding during the period. The two-class method determines EPS by (1) dividing the sum of distributed earnings allocated to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of shares of common stock outstanding for the period; and (2) dividing the sum of distributed earnings allocated to participating securities and undistributed earnings allocated to participating securities by the weighted average number of shares of participating securities for the period. The remaining potential dilutive common shares do not contain rights to distributions and are included in the computation of diluted EPS.

27

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Computations of basic and diluted EPS were as follows (in millions, except for per share data):

	Three Months Ended
	March 31, 2024		March 31, 2023
Numerator			As Restated
Net loss attributable to SUI common shareholders	$	(27.4)	$	(44.9)
Less: allocation to restricted stock awards	(0.2)		(0.2)
Basic earnings - net loss attributable to common shareholders after allocation to restricted stock awards	$	(27.2)	$	(44.7)
Add: allocation to common and preferred OP units dilutive effect	(0.8)		(0.9)
Add: allocation to restricted stock awards	(0.2)		(0.2)
Diluted earnings - net loss attributable to common shareholders after allocation to common and preferred OP units(1)	$	(28.2)	$	(45.8)

Denominator
Weighted average common shares outstanding	123.6		123.3
Add: dilutive restricted stock	0.3		0.4
Add: common and preferred OP units dilutive effect	2.7		2.5
Diluted weighted average common shares and securities(1)	126.6		126.2
EPS Available to Common Shareholders After Allocation
Basic loss per share	$	(0.22)	$	(0.36)
Diluted loss per share(1)	$	(0.22)	$	(0.36)

(1) For the three months ended March 31, 2024 and March 31, 2023, diluted loss per share was calculated using the treasury stock method for restricted common shares as the application of this method resulted in a more diluted loss per share during those periods.

We have excluded certain convertible securities from the computation of diluted EPS because the inclusion of those securities would have been anti-dilutive for the periods presented. The following table presents the outstanding securities that were excluded from the computations of diluted EPS as of March 31, 2024 and 2023 (in thousands):

	As of
	March 31, 2024	March 31, 2023
Common OP units	—	—
A-1 preferred OP units	192	208
A-3 preferred OP units	40	40
Aspen preferred OP units(1)	N/A	989
Series C preferred OP units	306	306
Series D preferred OP units	489	489
Series E preferred OP units	80	80
Series F preferred OP units	90	90
Series G preferred OP units	206	240
Series H preferred OP units	581	581
Series J preferred OP units	238	239
Series K preferred OP units	1,000	1,000
Series L preferred OP units	20	N/A
Total Securities	3,242	4,262

N/A = Not applicable.

(1) All of our outstanding Aspen preferred OP units converted during the year ended December 31, 2023.

28

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

15. Derivative Financial Instruments

Our objective and strategy in using interest rate derivatives is to manage exposure to interest rate movements, thereby minimizing the effect of interest rate changes and the effect they could have on future cash outflows (forecasted interest payments), on a forecasted issuance of long-term debt, or on outstanding floating rate debt. We typically enter into treasury rate locks, interest rate swaps, and forward swaps to accomplish this objective. We do not enter into derivative instruments for speculative purposes. We recognize derivative instruments at fair value on a recurring basis on the Consolidated Balance Sheets and classify the derivatives within Level 2 of the fair value hierarchy. We adjust our Consolidated Balance Sheets on a quarterly basis to reflect the current fair market value of the derivative instruments.

As of March 31, 2024 and December 31, 2023, we held 7 and 13 derivative contracts, which have each been designated as cash flow hedges under ASC Topic 815, "Derivatives and Hedging." The risks being hedged are the interest rate risk related to outstanding floating rate debt and forecasted debt issuance transactions, and the benchmark interest rates used are the SOFR and the SONIA Rate. The unrealized gains or losses on the derivative instruments are recorded in AOCI and are reclassified to Interest expense on the Consolidated Statements of Operations during the same period in which the hedged transaction affects earnings. We estimate that $16.3 million will be reclassified as a reduction to Interest expense over the next 12 months for all of our outstanding cash flow hedges. Cash flow from these derivative instruments is classified in the same category as the cash flow items being hedged on the Consolidated Statements of Cash Flows.

Derivative Contract Activity

During the three months ended March 31, 2024 and 2023, we entered into the following derivative contracts (with notional amounts in millions):

Period (Three months ended)	Number of Contracts	Instrument Type	Currency	Notional Amount		Index Type	Hedged Item
March 31, 2024	1	Interest Rate Swap	USD	$	25.0	SOFR	Future Debt Offering
March 31, 2023	1	Interest Rate Swap	GBP(1)	$	127.3	SONIA	Term Loan Senior Credit Facility
	1	Interest Rate Swap	USD	50.0		SOFR	Future Debt Offering
Total	2			$	177.3

(1) The notional amount of the swap contract in local currency is £100.0 million. The USD equivalent amount is converted as of December 31, 2023.

During the three months ended March 31, 2024 and 2023, we terminated the following derivative contracts (amounts in millions):

Period (Three months ended)	Type	Currency	Notional Amount		Cash Settlement Receipt / (Payment)
March 31, 2024	Forward Swap	USD	$	255.0	$	(2.3)	(1)
March 31, 2023	Treasury Rate Locks & Forward Swap(2)	USD	$	250.0	$	7.4	(2)

(1) Includes seven forward swap contracts which were terminated in connection with the 2029 Notes issuance.

(2) These includes two $100.0 million treasury rate locks and one $50.0 million forward swap which were terminated in connection with the 2033 Notes issuance.

The following table presents the gross fair value amounts of our derivative financial instruments and the associated notional amounts (in millions):

	March 31, 2024						December 31, 2023
Derivatives designated as cash flow hedges	Notional		Fair Value of Assets(1)		Fair Value of Liabilities(2)		Notional		Fair Value of Assets(1)		Fair Value of Liabilities(2)
Interest rate derivatives	$	806.2	$	12.2	$	0.9	$	1,041.5	$	11.7	$	7.7

(1)Included within Other assets, net on the Consolidated Balance Sheets.

(2)Included within Other liabilities on the Consolidated Balance Sheets.

Refer to Note 16, "Fair Value Measurements," for additional information related to the fair value methodology used for derivative financial instruments.

29

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

The following table presents the gains / (losses) on derivatives in cash flow hedging relationships recognized in OCI (in millions):

	Three Months Ended
Derivatives designated as cash flow hedges	March 31, 2024		March 31, 2023
Interest rate derivatives	$	8.8	$	(8.6)

The following table presents the amount of gains on derivative instruments reclassified from AOCI into earnings (in millions):

	Financial Statement Classification	Three Months Ended
Derivatives designated as cash flow hedges		March 31, 2024		March 31, 2023
Interest rate derivatives	Interest expense	$	4.9	$	2.3

16. Fair Value Measurements

Our financial instruments consist primarily of cash, cash equivalents and restricted cash, notes and other receivables, derivative assets, debt, warrants and other liabilities. We utilize fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures, pursuant to ASC 820, "Fair Value Measurements and Disclosures." The following methods and assumptions were used in order to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value:

ASC 820, "Fair Value Measurements and Disclosures," requires disclosure regarding determination of fair value for assets and liabilities and establishes a hierarchy under which these assets and liabilities must be grouped, based on significant levels of observable or unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. This hierarchy requires the use of observable market data when available. These two types of inputs have created the following fair value hierarchy:

Level 1 - Quoted unadjusted prices for identical instruments in active markets that we have the ability to access;

Level 2 - Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable (e.g., interest rates, yield curves, prepayment speeds, default rates, loss severity, etc.) in active markets or can be corroborated by observable market data; and

Level 3 - Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. The unobservable inputs reflect our assumptions about the assumptions that market participants would use.

Assets by Hierarchy Level

The table below sets forth our financial assets and liabilities (in millions) that required disclosure of fair value on a recurring basis as of March 31, 2024. The table presents the carrying values and fair values of our financial instruments as of March 31, 2024 and December 31, 2023, that were measured using the valuation techniques described above. The table excludes other financial instruments such as other receivables and accounts payable as the carrying values associated with these instruments approximate their fair value since their maturities are less than one year. These financial instruments are classified as Level 1 in the hierarchy.

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(Unaudited)

	March 31, 2024
			Fair Value
	Carrying Value		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial Assets
Cash, cash equivalents and restricted cash	$	132.5	$	132.5	$	—	$	—	$	132.5
Installment notes receivable on manufactured homes, net	38.3		—		—		38.3		38.3
Notes receivable from real estate developers and operators	127.7		—		—		127.7		127.7
Collateralized receivables, net	56.5		—		—		56.5		56.5
Derivative assets	12.2		—		12.2		—		12.2
Total assets measured at fair value	$	367.2	$	132.5	$	12.2	$	222.5	$	367.2
Financial Liabilities
Mortgage loan payable	$	3,465.5	$	—	$	3,089.3	$	—	$	3,089.3
Secured borrowings on collateralized receivables	56.1		—		—		56.1		56.1
Total secured debt	3,521.6		—		3,089.3		56.1		3,145.4
Unsecured debt
Senior unsecured notes	2,673.7		—		2,440.0		—		2,440.0
Line of credit and other unsecured debt	1,676.7		—		1,676.7		—		1,676.7
Total unsecured debt	4,350.4		—		4,116.7		—		4,116.7
Derivative liabilities	0.9		—		0.9		—		0.9
Other financial liabilities (contingent consideration)	20.2		—		—		20.2		20.2
Total liabilities measured at fair value	$	7,893.1	$	—	$	7,206.9	$	76.3	$	7,283.2

	December 31, 2023
			Fair Value
	Carrying Value		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial Assets
Cash, cash equivalents and restricted cash	$	42.7	$	42.7	$	—	$	—	$	42.7
Installment notes receivable on manufactured homes, net	19.6		—		—		19.6		19.6
Notes receivable from real estate developers and operators	134.5		—		—		134.5		134.5
Collateralized receivables, net	56.2		—		—		56.2		56.2
Derivative assets	11.7		—		11.7		—		11.7
Total assets measured at fair value	$	264.7	$	42.7	$	11.7	$	210.3	$	264.7
Financial Liabilities
Mortgage loan payable	$	3,478.9	$	—	$	3,167.0	$	—	$	3,167.0
Secured borrowings on collateralized receivables	55.8		—		—		55.8		55.8
Total secured debt	3,534.7		—		3,167.0		55.8		3,222.8
Unsecured debt
Senior unsecured notes	2,177.5		—		1,973.2		—		1,973.2
Line of credit and other unsecured debt	2,065.1		—		2,065.1		—		2,065.1
Total unsecured debt	4,242.6		—		4,038.3		—		4,038.3
Derivative liabilities	7.7		—		7.7		—		7.7
Other financial liabilities (contingent consideration)	20.2		—		—		20.2		20.2
Total liabilities measured at fair value	$	7,805.2	$	—	$	7,213.0	$	76.0	$	7,289.0

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

We utilize fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The following methods and assumptions were used in order to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value:

Cash, Cash Equivalents and Restricted Cash

The carrying values of cash, cash equivalents and restricted cash approximate their fair market values due to the short-term nature of the instruments. These are classified as Level 1 in the hierarchy.

Marketable Securities

The fair value of marketable securities is measured by the quoted unadjusted share price which is readily available in active markets (Level 1). We had zero marketable securities as of March 31, 2024. The change in the marketable securities balance was as follows (in millions):

	Year Ended
Marketable Securities	December 31, 2023
Beginning Balance	$	127.3
Change in fair value measurement	(16.0)
Foreign currency exchange losses	(7.8)
Dispositions(1)	(103.5)
Ending Balance	$	—

(1)During the year ended December 31, 2023, we sold our 41.8 million share position in Ingenia, generating $102.5 million of proceeds, net of $1.0 million of underwriting and other fees, with a realized loss of $8.0 million. The proceeds were used to pay down amounts drawn under our Senior Credit Facility.

Installment Notes Receivable on Manufactured Homes and Collateralized Receivables

Installment notes receivable on manufactured homes are recorded at fair value and are measured using model-derived indicative pricing using primarily unobservable inputs, inclusive of default rates, interest rates and recovery rates (Level 3). Refer to Note 4, "Notes and Other Receivables," and Note 5, "Collateralized Receivables and Transfers of Financial Assets," for additional information.

Notes Receivable from Real Estate Developers and Operators

Notes receivable from real estate developers and operators are recorded at fair value and are measured using model-derived indicative pricing using primarily unobservable inputs including interest rates and counterparty performance (Level 3). The carrying values of the notes generally approximate their fair market values either due to the nature of the note and / or the note being secured primarily by underlying real estate and other collateral and / or personal guarantees. Refer to Note 4, "Notes and Other Receivables," for additional information.

Derivative Assets and Liabilities - Interest Rate Derivatives

Interest rate derivatives are recorded at fair value and consist of treasury rate lock contracts, interest rate swaps and forward swaps. The fair value of these financial instruments are measured using observable inputs based on the 10-year Treasury note rate, the SOFR and SONIA Rates, respectively (Level 2).

Secured Debt

Secured debt consists primarily of our mortgage term loans. The fair value of mortgage term loans is based on the estimates of management and on rates currently quoted, rates currently prevailing for comparable loans and instruments of comparable maturities (Level 2). Refer to Note 9, "Debt and Line of Credit," for additional information.

Secured borrowings on collateralized receivables - recorded at fair value and adjusted based on the same interest rates as the related collateralized receivables (Level 3). Refer to Note 5, "Collateralized Receivables and Transfers of Financial Assets," and Note 9, "Debt and Line of Credit," for additional information.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Unsecured Debt

Senior unsecured notes - the fair value of senior unsecured notes is based on the estimates of management and on rates currently quoted, rates currently prevailing for comparable loans and instruments of comparable maturities (Level 2). Refer to Note 9, "Debt and Line of Credit," for additional information.

Line of credit and other unsecured debt - consists primarily of our Senior Credit Facility. We have variable rates on our Senior Credit Facility. The fair value of the debt with variable rates approximates carrying value as the interest rates of these amounts approximate market rates (Level 2). The estimated fair value of our debt as of March 31, 2024 approximated its gross carrying value.

Other Financial Liabilities

We estimate the fair value of contingent consideration liabilities based on valuation models using significant unobservable inputs that generally consider discounting of future cash flows using market interest rates and adjusting for non-performance risk over the remaining term of the liability (Level 3).

Level 3 Reconciliation, Measurements and Transfers

We review the fair value hierarchy classifications each reporting period. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in and out of Level 3 at the beginning fair value for the reporting period in which the changes occur. Availability of secondary market activity and consistency of pricing from third-party sources impacts our ability to classify securities as Level 2 or Level 3. There were no transfers into or out of Level 3 during the three months ended March 31, 2024.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

The following tables summarize changes to our financial instruments carried at fair value and classified within Level 3 of the fair value hierarchy for the three months ended March 31, 2024 and 2023 (in millions):

	Three Months Ended
	March 31, 2024									March 31, 2023
Assets	Installment Notes Receivable on MH, net			Notes Receivable From Real Estate Developers and Operators			Collateralized Receivables, net			Installment Notes Receivable on MH, net			Notes Receivable From Real Estate Developers and Operators		Warrants
Level 3 beginning balance at December 31, 2023 and 2022	$	19.6		$	134.5		$	56.2		$	65.9		$	305.2	$	—
Realized gains / (losses)	—		(1)	(0.8)		(1)	1.6		(2)	(1.7)		(1)	—		(0.4)		(3)
Purchases and issuances	19.4			5.0			—			0.1			124.3		0.4
Sales and settlements	(0.7)			(10.9)			(1.3)			(2.1)			(3.0)		—
Foreign currency exchange losses	—			(0.1)			—			—			—		—
Other adjustments	—			—			—			—			8.5		—
Level 3 ending balance at March 31, 2024 and 2023	$	38.3		$	127.7		$	56.5		$	62.2		$	435.0	$	—

(1) Realized losses recorded within Loss on remeasurement of notes receivable on the Consolidated Statements of Operations.

(2) Realized gains recorded within Other income / (expense), net on the Consolidated Statements of Operations.

(3) Realized losses recorded within Income / (loss) from nonconsolidated affiliates within on the Consolidated Statements of Operations.

	Three Months Ended
	March 31, 2024				March 31, 2023
Liabilities	Secured Borrowing on Collateralized Receivables		Contingent Consideration		Contingent Consideration
Level 3 beginning balance December 31, 2023 and 2022	$	55.8	$	20.2	$	20.2
Realized losses(1)	1.6		—		—
Purchases and issuances	—		—		—
Sales and settlements	(1.3)		—		—
Other adjustments	—		—		—
Level 3 ending balance at March 31, 2024 and 2023	$	56.1	$	20.2	$	20.2

(1) Realized losses are recorded within Other income / (expense), net on the Consolidated Statements of Operations.

Although we have determined the estimated fair value amounts using available market information and commonly accepted valuation methodologies, considerable judgment is required in interpreting market data to develop fair value estimates. The fair value estimates are based on information available as of March 31, 2024. As such, our estimates of fair value could differ significantly from the actual carrying value.

17. Commitments and Contingencies

Legal Proceedings - Class Action Litigation

Since August 31, 2023, several putative class action complaints have been filed in the U.S. District Court for the Northern District of Illinois, Eastern Division, against Datacomp Appraisal Systems, Inc., us, and nine other large MH operators in the U.S. The complaint alleges that the defendants have violated federal antitrust laws by sharing and receiving competitively sensitive non-public information to maintain artificially high site rents. The complaints have been consolidated into the case captioned In re Manufactured Home Lot Rents Antitrust Litigation, No. 1:23-cv-06715.

Plaintiffs seek both injunctive and monetary damages, as well as attorneys' fees. We are unable to estimate a range of loss, if any, that could result were there to be an adverse final decision in this litigation. If an unfavorable result were to occur, it is possible that the impact could be material to our results of operations in the periods in which any such outcome becomes probable and estimable.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

We believe that the plaintiffs' allegations are without merit and intend to defend against them vigorously. However, litigation is inherently uncertain and there can be no assurance regarding the likelihood that our defense of this litigation will be successful.

Other Legal Proceedings

We are involved in various other legal proceedings arising in the ordinary course of business. All such proceedings, taken together, are not expected to have a material adverse impact on our results of operations or financial condition.

Catastrophic Event-Related Charges

Hurricane Ian - When Hurricane Ian made landfall on Florida's western coast in September 2022, the storm primarily affected three properties in the Fort Myers area, comprising approximately 2,500 sites. These properties sustained significant flooding and wind damage from the hurricane. At other affected MH and RV properties, most of the damage was limited to trees, roofs, fences, skirting and carports. At affected marina properties, docks, buildings, and landscaping sustained wind and water damage.

We maintain property, casualty, flood and business interruption insurance for our community portfolio, subject to customary deductibles and limits.

Estimated property insurance recoveries, excluding business interruption recoveries, of $52.8 million related to Hurricane Ian were recorded in Notes and other receivables, net on the Consolidated Balance Sheets as of March 31, 2024.

The table below sets forth changes in estimated property insurance recoveries, excluding business interruption recoveries (in millions):

	Three Months Ended March 31, 2024
Total estimated insurance receivable - December 31, 2023	$	56.7
Change in estimated property insurance recoveries	3.0
Proceeds received from insurer	(6.9)
Total estimated insurance receivable - March 31, 2024	$	52.8

Changes in estimated property insurance recoveries related to Hurricane Ian during the three months ended March 31, 2024 were primarily the result of $3.0 million of incremental costs that exceeded the applicable deductible. The foregoing estimates are based on current information available, and we continue to assess these estimates. Actual charges and insurance recoveries could vary significantly from these estimates. Any changes to these estimates will be recognized in the period(s) in which they are determined.

We are actively working with our insurance providers on claims for business interruption recoveries. During the three months ended March 31, 2024 and 2023, we did not recognize any business interruption recoveries for lost earnings from the hurricane event. The related communities are under redevelopment. As such, we currently cannot estimate a date when operating results will be restored to pre-hurricane levels. Our business interruption insurance policy provides for up to 60 months of coverage from the date of restoration.

Other - In December 2023, one of our RV properties with approximately 300 sites sustained property damage due to heavy rainfall and flooding in the North Conway, New Hampshire area. Based on a preliminary review performed by an insurance adjuster, we recognized asset impairment charges of $7.0 million during the three months ended December 31, 2023, primarily related to site improvements, vacation rental cabins, and equipment. During the three months ended March 31, 2024, we recognized incremental charges of $4.7 million related to the impacted property, comprised of $3.1 million for impaired assets and $1.6 million for debris removal and cleanup. The charges were recorded within Catastrophic event-related charges, net in our Consolidated Statements of Operations. The foregoing estimates are based on current information available after the preliminary review of the damages incurred. Actual charges and insurance recoveries could differ from these estimates. Any changes to these estimates will be recognized in the period(s) in which they are determined.

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(Unaudited)

18. Leases

Lessee Accounting

We lease land under non-cancelable operating leases at certain MH, RV, Marina and UK properties expiring at various dates through 2100. The majority of the leases have terms requiring fixed payments plus additional rents based on a percentage of revenues at those properties. We also have other operating leases, primarily office space and equipment expiring at various dates through 2042.

Future minimum lease payments under non-cancellable leases as of March 31, 2024 where we are the lessee include (in millions):

Maturity of Lease Liabilities	Finance Leases		Operating Leases		Total
2024 (excluding three months ended March 31, 2024)	$	4.4	$	10.7	$	15.1
2025	0.5		14.0		14.5
2026	0.5		12.5		13.0
2027	0.5		10.5		11.0
2028	0.5		9.8		10.3
Thereafter	21.3		240.4		261.7
Total Lease Payments	$	27.7	$	297.9	$	325.6
Less: Imputed interest	(13.7)		(136.3)		(150.0)
Present Value of Lease Liabilities	$	14.0	$	161.6	$	175.6

Right-of-use ("ROU") assets and lease liabilities for finance and operating leases as included in our Consolidated Balance Sheets are as follows (in millions):

	Financial Statement Classification	As of
Description		March 31, 2024		December 31, 2023
Lease Assets
Finance lease - ROU asset, net of accumulated amortization	Investment property, net	$	31.7	$	32.6
Operating lease - ROU asset, net	Other assets, net	$	177.4	$	176.0
Below market operating leases, net	Other assets, net	$	93.8	$	95.0
Lease Liabilities
Finance lease liabilities	Other liabilities	$	14.0	$	14.3
Operating lease liabilities	Other liabilities	$	161.6	$	159.5

The components of lease costs for finance and operating leases as included in our Consolidated Statements of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Finance Lease Cost
Amortization of ROU assets	Depreciation and amortization	$	0.7	$	0.7
Interest on lease liabilities	Interest expense	0.2		0.2
Operating lease cost	General and administrative expense, Property operating and maintenance, Depreciation and amortization	4.4		4.6
Variable lease cost	Property operating and maintenance	2.0		1.6
Total Lease Cost		$	7.3	$	7.1

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

Lease term, discount rates and additional information for finance and operating leases are as follows:

	As of
	March 31, 2024		December 31, 2023
Lease Term and Discount Rate
Weighted-average Remaining Lease Terms (years)
Finance lease	36.86		36.63
Operating lease	34.17		27.71
Weighted-average Discount Rate
Finance lease	3.60	%	3.59	%
Operating lease	3.78	%	3.82	%

	Three Months Ended
	March 31, 2024		March 31, 2023
Other Information (in millions)
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash outflows for operating leases	$	3.0	$	3.3
Financing cash outflows for finance leases	0.2		5.9
Total Cash Paid on Lease Liabilities	$	3.2	$	9.2

Lessor Accounting

We are not the lessor for any finance leases at our MH, RV, Marina or UK properties as of March 31, 2024.

Nearly all of our operating leases with our residents and customers at our MH, RV and UK properties where we are the lessor are either month-to-month or for a time period not to exceed one year. As of March 31, 2024, future minimum lease payments with our residents or customers would not exceed 12 months.

We do not have any operating leases with real estate operators on our MH or UK properties. At our RV communities and marinas, future minimum lease payments under non-cancellable leases with real estate operators where we are the lessor include the following as of March 31, 2024 (in millions):

Maturity of Lease Payments	Operating Leases
2024 (excluding the three months ended March 31, 2024)	$	18.7
2025	18.1
2026	13.1
2027	8.8
2028	7.8
Thereafter	81.5
Total Undiscounted Cash Flows	$	148.0

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

The components of lease income for our operating leases, as included in our Consolidated Statement of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Operating Leases
Fixed lease income	Income from real property; Brokerage commissions and other revenue, net	$	8.7	$	7.9
Variable lease income(1)	Income from real property; Brokerage commissions and other revenue, net	$	3.4	$	1.5

(1)Consists of rent primarily based on a percentage of operating revenues beyond target thresholds.

Failed Sale Leaseback

In connection with our acquisition of Park Holidays, we assumed ground lease arrangements for 34 UK properties that we concluded to be failed sale-leaseback transactions under ASC Topic 842, "Leases." The arrangements have maturities ranging from 2117 through 2197 with an option to repurchase for £1.00 at the end of the term. The obligation related to the underlying ground leases has been recorded as a financial liability in Other Liabilities on the Consolidated Balance Sheets. The financial liability was $357.1 million and $359.7 million as of March 31, 2024 and December 31, 2023, respectively. The following table presents the future minimum rental payments for this financial liability as of March 31, 2024 (in millions):

Maturity of Financial Liability	March 31, 2024
2024 (excluding three months ended March 31, 2024)	$	10.6
2025	11.9
2026	12.0
2027	12.1
2028	12.0
Thereafter	1,742.9
Total Payments	$	1,801.5
Less: Imputed interest	(1,444.4)
Present Value of Financial Liability	$	357.1

19. Recent Accounting Pronouncements

Recent Accounting Pronouncements - Adopted

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting," which provides optional guidance for accounting for contracts, hedging relationships and other transactions affected by the reference rate reform, if certain criteria are met. The provisions of this standard were available for election through December 31, 2022. In December 2022, the FASB issued ASU 2022-06, "Reference Rate Reform (Topic 848) - Deferral of the Sunset Date of Topic 848," which defers the sunset date for Topic 848 from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. As of March 31, 2024, all of our debt and derivative instruments have been converted from LIBOR to alternative reference rates. The adoption of this ASU did not have a material impact on our Consolidated Financial Statements as the majority of our debt has fixed interest rates.

Recent Accounting Pronouncements - Not Yet Adopted

In October 2023, the FASB issued ASU 2023-06, "Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative," which adds interim and annual disclosure requirements to the US GAAP codification at the request of the SEC. The new guidance is intended to align GAAP requirements with those of the SEC and to facilitate the application of GAAP for all entities. These disclosure requirements are currently included in either SEC Regulation S-X or SEC Regulation S-K. The effective date for each amendment will be the date on which the SEC's removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective. Early adoption is prohibited and the amendments should be applied prospectively. If the SEC has not removed the applicable requirement from Regulation S-X or Regulation S-K by June 30, 2027, the amendments will be removed from the US GAAP codification and will not be effective.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - (Continued)

(Unaudited)

In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which enhances disclosure of significant segment expenses that are regularly provided to the chief operating decision maker to assess segment performance, including each reported measure of segment profit or loss, an amount and description of the composition for other segment items to reconcile to segment profit or loss, interim disclosures of a reportable segment's profit or loss and assets, and the title and position of our chief operating decision maker. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments should be applied prospectively. We are currently evaluating the provisions of this amendment and the impact on our Consolidated Financial Statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures," which requires disclosure of specific categories in the effective tax rate reconciliation as well as provide additional information for reconciling items that meet a quantitative threshold. Further, this amendment requires certain disclosure of income taxes paid disaggregated by federal, state and foreign taxes, and the amount of income taxes paid disaggregated by individual jurisdiction in which income taxes paid meet a quantitative threshold. The new guidance is intended to enhance the transparency and decision usefulness of income tax disclosures. This ASU is effective for fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments should be applied prospectively. We are currently evaluating the provisions of this amendment and the impact on our Consolidated Financial Statements and related disclosures.

20. Subsequent Events

Acquisitions

Subsequent to the three months ended March 31, 2024, we acquired the following properties:

Property Name	Property Type	Sites, Wet Slips and Dry Storage Spaces	Development Sites	State, Province or Country	Total Purchase Price (in millions)
Port Milford(1)	Marina	92	—	CT	$	4.0
Oak Leaf	Marina	89	—	CT	5.0
Berth One Palm Beach	Marina	4	—	FL	3.0
Total Subsequent Acquisitions		185	—		$	12.0

(1)In conjunction with the acquisition, we issued 19,326 common OP units valued at $2.5 million.

We have evaluated our Consolidated Financial Statements for subsequent events through the date that this Form 10-Q was issued.

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ITEM 2.     MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion and analysis of the consolidated financial condition and results of operations should be read in conjunction with the Consolidated Financial Statements and the accompanying Notes, along with our 2023 Annual Report.

OVERVIEW

We are a fully integrated REIT. As of March 31, 2024, we owned and operated, directly or indirectly, or had an interest in, a portfolio of 665 developed properties located in the U.S., Canada and the United Kingdom including 296 MH communities, 179 RV communities, and 136 marinas, and 54 UK communities.

We have been in the business of operating, acquiring, developing and expanding MH and RV communities since 1975, marinas since 2020, and communities in the United Kingdom since 2022. We lease individual parcels of land, or sites, with utility access for the placement of manufactured homes and RVs to our MH, RV and UK customers. Our MH communities are designed to offer affordable housing to individuals and families, while also providing certain amenities. In the U.S., we are also engaged in the marketing, selling and leasing of new and pre-owned homes to current and future residents in our MH communities. The rental program operations within our MH communities support and enhance our occupancy levels, property performance and cash flows. Our RV communities are designed to offer affordable vacation opportunities to individuals and families complemented by a diverse selection of high-quality amenities. The majority of our marinas are concentrated in coastal regions. Our marinas offer wet slip and dry storage space leases, end-to-end service (such as routine maintenance, repair and winterization), fuel sales and other high-end amenities. These services and amenities offer convenience and resort-quality experiences to our members and guests. In the United Kingdom, our UK communities are referred to as "holiday parks" and are located predominantly at irreplaceable seaside destinations in the south of England. We provide holiday home sales and associated site license activities to holiday homeowners in our communities.

SIGNIFICANT ACCOUNTING POLICIES

We have identified significant accounting policies that, as a result of the judgments, uncertainties and complexities of the underlying accounting standards and operations involved could result in material changes to our financial condition or results of operations under different conditions or using different assumptions. Details regarding significant accounting policies are described fully in our Annual Report on Form 10-K for the year ended December 31, 2023.

NON-GAAP FINANCIAL MEASURES

In addition to the results reported in accordance with GAAP in our "Results of Operations" below, we have provided information regarding net operating income ("NOI") and funds from operations ("FFO") as supplemental performance measures. We believe NOI and FFO are appropriate measures given their wide use by and relevance to investors and analysts following the real estate industry. NOI provides a measure of rental operations and does not factor in depreciation, amortization and non-property specific expenses such as general and administrative expenses. FFO, reflecting the assumption that real estate values rise or fall with market conditions, principally adjusts for the effects of GAAP depreciation / amortization of real estate assets. In addition, NOI and FFO are commonly used in various ratios, pricing multiples / yields and returns and valuation calculations used to measure financial position, performance and value.

NOI

Total Portfolio NOI - NOI is derived from property operating revenues minus property operating expenses and real estate taxes. NOI is a non-GAAP financial measure that we believe is helpful to investors as a supplemental measure of operating performance because it is an indicator of the return on property investment and provides a method of comparing property performance over time. We use NOI as a key measure when evaluating performance and growth of particular properties and / or groups of properties. The principal limitation of NOI is that it excludes depreciation, amortization, interest expense and non-property specific expenses such as general and administrative expenses, all of which are significant costs. Therefore, NOI is a measure of the operating performance of our properties rather than of the Company overall. We believe that NOI provides enhanced comparability for investor evaluation of properties' performance and growth over time.

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We believe that GAAP net income (loss) is the most directly comparable measure to NOI. NOI should not be considered to be an alternative to GAAP net income (loss) as an indication of our financial performance or GAAP cash flow from operating activities as a measure of our liquidity; nor is it indicative of funds available for our cash needs, including our ability to make cash distributions. Because of the inclusion of items such as interest, depreciation and amortization, the use of GAAP net income (loss) as a performance measure is limited as these items may not accurately reflect the actual change in market value of a property, in the case of depreciation and in the case of interest, may not necessarily be linked to the operating performance of a real estate asset, as it is often incurred at a parent company level and not at a property level.

Same Property NOI - This is a management tool used when evaluating the performance and growth of our Same Property portfolio. We define same properties as those we have owned and operated continuously since January 1, 2023. Same properties exclude ground-up development properties, acquired properties and properties sold after December 31, 2022. The Same Property data may change from time-to-time depending on acquisitions, dispositions, management discretion, significant transactions or unique situations. Same Property NOI does not include the revenues and expenses related to home sales, and service, retail, dining and entertainment activities at the properties. We believe that Same Property NOI is helpful to investors as a supplemental comparative performance measure of the income generated from the Same Property portfolio from one period to the next.

FFO

FFO is defined by the National Association of Real Estate Investment Trusts ("NAREIT") as GAAP net income (loss), excluding gains (or losses) from sales of certain real estate assets, plus real estate related depreciation and amortization, impairments of certain real estate assets and investments, and after adjustments for unconsolidated partnerships and joint ventures. FFO is a non-GAAP financial measure that management believes is a useful supplemental measure of our operating performance. By excluding gains and losses related to sales of previously depreciated operating real estate assets, real estate related to impairment and real estate asset depreciation and amortization (which can vary among owners of identical assets in similar condition based on historical cost accounting and useful life estimates), FFO provides a performance measure that, when compared period-over-period, reflects the impact to operations from trends in occupancy rates, rental rates, and operating costs, providing perspective not readily apparent from GAAP net income (loss). Management believes the use of FFO has been beneficial in improving the understanding of operating results of REITs among the investing public and making comparisons of REIT operating results more meaningful.

Core FFO - In addition, we use FFO excluding certain gain and loss items that management considers unrelated to the operational and financial performance of our core business ("Core FFO").

We believe that FFO and Core FFO provide enhanced comparability for investor evaluations of period-over-period results. We believe that GAAP net income (loss) is the most directly comparable measure to FFO. The principal limitation of FFO is that it does not replace GAAP net income (loss) as a financial performance measure or GAAP cash flow from operating activities as a measure of our liquidity. Because FFO excludes significant economic components of GAAP net income (loss) including depreciation and amortization, FFO should be used as a supplement to GAAP net income (loss) and not as an alternative to it. Furthermore, FFO is not intended as a measure of a REIT's ability to meet debt principal repayments and other cash requirements, nor as a measure of working capital. FFO is calculated in accordance with our interpretation of standards established by NAREIT, which may not be comparable to FFO reported by other REITs that interpret the NAREIT definition differently.

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RESULTS OF OPERATIONS

The following tables reconcile the Net loss attributable to SUI common shareholders to NOI and summarize our consolidated financial results for the three months ended March 31, 2024 and 2023 (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
			As Restated
Net Loss Attributable to SUI Common Shareholders	$	(27.4)	$	(44.9)
Interest income	(4.6)		(11.4)
Brokerage commissions and other revenues, net	(3.0)		(9.5)
General and administrative	78.5		64.1
Catastrophic event-related charges, net	7.2		1.0
Business combination expense	—		2.8
Depreciation and amortization	165.3		155.6
Asset impairments	20.7		2.4
Goodwill impairment	—		15.4
Loss on extinguishment of debt (see Note 9)	0.6		—
Interest expense	89.7		76.6
Interest on mandatorily redeemable preferred OP units / equity	—		1.0
Loss on remeasurement of marketable securities (see Note 16)	—		19.9
(Gain) / loss on foreign currency exchanges	(1.1)		2.7
(Gain) / loss on disposition of properties	(5.4)		1.6
Other (income) / expense, net	(8.0)		1.0
Loss on remeasurement of notes receivable (see Note 4)	0.7		1.7
(Income) / loss from nonconsolidated affiliates (see Note 7)	(1.4)		0.2
(Gain) / loss on remeasurement of investment in nonconsolidated affiliates (see Note 7)	(5.2)		4.5
Current tax expense (see Note 13)	2.1		3.9
Deferred tax benefit (see Note 13)	(5.7)		(4.6)
Add: Preferred return to preferred OP units / equity interests	3.2		2.4
Add: Loss attributable to noncontrolling interests	(1.3)		(5.8)
NOI	$	304.9	$	280.6

	Three Months Ended
	March 31, 2024		March 31, 2023
Real property NOI	$	285.9	$	254.3
Home sales NOI	17.0		23.7
Service, retail, dining and entertainment NOI	2.0		2.6
NOI	$	304.9	$	280.6

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Seasonality of Revenue

The RV and marina industries are seasonal in nature, and the results of operations in any one period may not be indicative of results in future periods.

In the RV business, certain properties maintain higher occupancy during the summer months, while other properties maintain higher occupancy during the winter months. Based on the location of our properties with transient RV sites, our portfolio generally produces higher revenues between April and September than between October and March. During the three months ended March 31, 2024, we recognized Real property - transient revenue of $37.7 million. During the year ended December 31, 2023, we recognized Real property - transient revenue as follows:

	Real property - transient revenue (in millions)		During the Three Months Ended
Year			March 31		June 30		September 30		December 31		Total
2023	$	321.4	12.4	%	27.8	%	47.3	%	12.5	%	100.0	%

In the marina business, the majority of our wet slip and dry storage space leases have annual terms that are billed seasonally. Wet slip storage increases during the summer months for the boating season, whereas dry storage increases during the winter season as weather patterns require boat owners to store their vessels on dry docks or within covered racks. During the three months ended March 31, 2024, we recognized seasonal real property revenue of $78.1 million. During the year ended December 31, 2023, we recognized seasonal real property revenue as follows:

	Seasonal real property revenue (in millions)		During the Three Months Ended
Year			March 31		June 30		September 30		December 31		Total
2023	$	348.7	20.8	%	25.9	%	28.6	%	24.7	%	100.0	%

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Real Property Operations - Total Portfolio

The following tables reflect certain financial and other information for our real estate operations by segment as of and for the three months ended March 31, 2024 and 2023 (in millions, except for statistical information).

	Three Months Ended March 31, 2024														Three Months Ended March 31, 2023
Financial Information	MH			RV			Marinas		UK			Total			MH			RV			Marinas		UK			Total
Revenues
Real property (excluding transient)	$	237.6		$	70.0		$	92.4	$	35.4		$	435.4		$	223.5		$	61.8		$	85.4	$	27.5		$	398.2
Real property - transient	0.4			34.5			4.0		2.6			41.5			0.5			37.8			3.7		1.4			43.4
Total operating revenues	238.0			104.5			96.4		38.0			476.9			224.0			99.6			89.1		28.9			441.6
Expenses
Property operating expenses	75.5			53.3			39.5		22.7			191.0			73.4			54.5			36.9		22.5			187.3
Real Property NOI	$	162.5		$	51.2		$	56.9	$	15.3		$	285.9		$	150.6		$	45.1		$	52.2	$	6.4		$	254.3
	As of March 31, 2024														As of March 31, 2023
Other information	MH			RV			Marinas		UK			Total			MH			RV			Marinas		UK			Total
Number of properties	296			179			136		54			665			299			182			135		55			671
Sites, wet slips and dry storage spaces
Sites, wet slips and dry storage spaces(a)	99,930			33,290			48,040		18,110			199,370			100,120			30,860			47,990		17,850			196,820
Transient sites	N/M			25,560			N/A		3,220			28,780			N/M			27,610			N/A		3,260			30,870
Total	99,930			58,850			48,040		21,330			228,150			100,120			58,470			47,990		21,110			227,690
MH and Annual RV Occupancy	96.7		%	100.0		%	N/A		88.9		%	96.5		%	96.0		%	100.0		%	N/A		90.1		%	96.1		%

N/M = Not meaningful. N/A = Not applicable.

(a) MH annual sites included 10,300 and 9,520 rental homes in our rental program during the three months ended March 31, 2024 and 2023, respectively. Our investment in occupied rental homes at March 31, 2024 was $696.3 million, an increase of 15.7% from $601.8 million at March 31, 2023.

For the three months ended March 31, 2024, the $31.6 million, or 12.4% increase in Real Property NOI as compared to the same period in 2023, consists of $12.1 million from Same Property MH, $3.8 million from Same Property RV, $3.6 million from Same Property Marina, $3.3 million from Same Property UK and $8.8 million, net from other recently acquired or developed properties and other items.

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Real Property Operations - North America Same Property Portfolio

Same Property refers to properties that we have owned for at least the preceding year, exclusive of properties recently completed or under construction, and other properties as determined by management. The Same Property data may change from time-to-time depending on acquisitions, dispositions, management discretion, significant transactions or unique situations. In order to evaluate the growth of the Same Property portfolio, management has classified certain items differently than our GAAP statement. The reclassification difference between our GAAP statements and our Same Property portfolio is the reclassification of utility revenues from real property revenue to operating expenses. Additionally, prior period Canadian currency figures have been translated at 2024 average exchange rates for constant currency comparability.

The following tables reflect certain financial and other information for our Same Property MH, RV and Marina portfolios as of and for the three months ended March 31, 2024 and 2023 (in millions, except for statistical information):

	Three Months Ended
	March 31, 2024								March 31, 2023								Total Change		% Change(c)
	MH(a)		RV(a)		Marina		Total		MH(a)		RV(a)		Marina		Total				MH		RV		Marina		Total(d)
Financial information
Same Property Revenues
Real property (excluding transient)	$	218.0	$	65.1	$	78.9	$	362.0	$	204.1	$	57.4	$	73.5	$	335.0	$	27.0	6.8	%	13.4	%	7.3	%	8.0	%
Real property - transient	0.4		31.3		3.9		35.6		0.4		36.0		3.7		40.1		(4.5)		19.0	%	(13.2)	%	4.9	%	(11.2)	%
Total Same Property operating revenues	218.4		96.4		82.8		397.6		204.5		93.4		77.2		375.1		22.5		6.8	%	3.1	%	7.1	%	6.0	%
Same Property Expenses
Same Property operating expenses(b)(d)	56.2		46.2		31.4		133.8		54.4		47.0		29.4		130.8		3.0		3.4	%	(1.8)	%	6.5	%	2.2	%
Real Property NOI(d)	$	162.2	$	50.2	$	51.4	$	263.8	$	150.1	$	46.4	$	47.8	$	244.3	$	19.5	8.0	%	8.1	%	7.5	%	7.9	%
Other information
Number of properties	291		165		127		583		291		165		127		583
Sites, wet slips and dry storage spaces	99,130		55,720		43,450		198,300		99,280		55,430		43,460		198,170

(a) Same property results for our MH and RV properties reflect constant currency for comparative purposes. Canadian currency figures in the prior comparative period have been translated at the average exchange rate during the three months ended March 31, 2024 of $0.7418 USD per Canadian dollar.

(b) We net certain utilities revenues (which include utility reimbursement revenues from residents) against related utility expenses in property operating expenses as follows (in millions):

	Three Months Ended March 31, 2024								Three Months Ended March 31, 2023
	MH		RV		Marina		Total		MH		RV		Marina		Total
Utility revenue netted against related utility expense	$	18.4	$	4.1	$	5.5	$	28.0	$	18.4	$	4.1	$	5.2	$	27.7

(c) Percentages are calculated based on unrounded numbers.

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Real Property Operations - North America Same Property Portfolio (Continued)

(d) Total Same Property operating expenses consist of the following components for the periods shown (in millions), and exclude amounts invested into recently acquired properties to bring them up to our standards.

	Three Months Ended
	March 31, 2024		March 31, 2023		Change		% Change
Payroll and benefits	$	42.7	$	43.4	$	(0.7)	(1.7)	%
Real estate taxes	28.8		28.0		0.8		2.5	%
Supplies and repairs	15.5		14.4		1.1		7.6	%
Utilities	13.9		14.5		(0.6)		(4.7)	%
Legal, state / local taxes, and insurance	14.4		14.6		(0.2)		(0.9)	%
Other	18.5		15.9		2.6		16.9	%
Total Same Property Operating Expenses	$	133.8	$	130.8	$	3.0	2.2	%

North America Same Property Summary (in whole units)

	As of
	March 31, 2024						March 31, 2023
	MH			RV			MH			RV
Other information
Number of properties	291			165			291			165
Sites
MH and Annual RV sites	99,130			32,440			99,280			30,700
Transient RV sites	N/A			23,280			N/A			24,730
Total	99,130			55,720			99,280			55,430
MH and Annual RV Occupancy
Occupancy(a)	97.2		%	100.0		%	96.6		%	100.0		%
Monthly base rent per site	$	686		$	608		$	647		$	567
% change in monthly base rent(b)	6.0		%	7.2		%	N/A			N/A
Rental Program Statistics included in MH:
Number of occupied sites, end of period(c)	10,120			N/A			9,500			N/A
Monthly rent per site - MH Rental Program	$	1,312		N/A			$	1,247		N/A
% change(c)	5.3		%	N/A			N/A			N/A

N/A = Not applicable.

(a) Same Property adjusted blended occupancy for MH and RV combined increased to 98.9% at March 31, 2024, from 97.1% at March 31, 2023. The 180 basis point increase was driven by MH expansion fills and the conversion of transient RV sites to annual sites. Same Property blended occupancy for MH and RV was 97.9% at March 31, 2024, up 50 basis points from 97.4% at March 31, 2023. The 50 basis point increase was driven by MH expansion fills and the conversion of transient RV sites to annual sites.

(b) Calculated using actual results without rounding.

(c) Occupied rental program sites in Same Property are included in total sites.

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Real Property Operations - UK Same Property Portfolio

The following tables reflect certain financial and other information for our Same Property UK portfolio as of and for the three months ended March 31, 2024 and 2023 (in millions, except for statistical information):

	Three Months Ended
	March 31, 2024		March 31, 2023		% Change(b)
Financial Information(a)
Same Property Revenues
Real property (excluding transient)	$	24.9	$	23.0	8.3	%
Real property - transient	2.6		1.5		75.9	%
Total Same Property operating revenues	27.5		24.5		12.3	%
Same Property Expenses
Same Property operating expenses(c)	16.8		17.1		(1.7)	%
Real Property NOI	$	10.7	$	7.4	44.5	%
Other Information
Number of properties	53		53

(a) Same Property results for the Company's properties reflect constant currency for comparative purposes. United Kingdom currency figures in the prior comparative period have been translated at the average exchange rate of $1.2681 USD per Pound sterling, during the three months ended March 31, 2024.

(b) Percentages are calculated based on unrounded numbers.

(c) We net certain utilities revenues (which include utility reimbursement revenues from residents) against related utility expenses in property operating expenses as follows (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Utility revenue netted against related utility expense	$	4.7	$	4.8

UK Same Property Summary (in whole units)

	As of
	March 31, 2024			March 31, 2023			Change(a)
Other Information
Number of properties	53			53			—
Sites
UK	16,690			16,440			250
UK Transient	3,060			3,130			(70)
Occupancy(b)	89.4		%	90.7		%	(1.3)		%
Monthly base rent per site	$	521		$	481		$	40

(a) Calculated using actual results without rounding.

(b) Adjusting for recently delivered and vacant expansion sites, Same Property adjusted occupancy decreased by 40 basis points year over year, to 90.4% at March 31, 2024, from 90.8% at March 31, 2023.

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SUN COMMUNITIES, INC.

For the three months ended March 31, 2024 and 2023:

•The MH segment increase in NOI of $12.1 million, or 8.0%, when compared to the same period in 2023 is primarily due to an increase in Real property (excluding transient) revenue of $13.9 million, or 6.8%. Real property (excluding transient) revenue increased primarily due to a 6.0% increase in monthly base rent.

•The RV segment increase in NOI of $3.8 million, or 8.1%, when compared to the same period in 2023 is primarily due to an increase in Real property (excluding transient) revenue of $7.7 million, or 13.4%, partially offset by a decrease in Real property-transient revenue of $4.7 million, or 13.2%. The increase in Real property - (excluding transient) revenue was primarily due to a 7.2% increase in monthly base rent and conversions of transient RV sites to annual RV sites.

•The Marina segment increase in NOI of $3.6 million, or 7.5%, when compared to the same period in 2023 is primarily due to the $5.4 million, or 7.3%, increase in Real property (excluding transient) revenue.

•The UK segment increase in NOI of $3.3 million, or 44.5%, when compared to the same period in 2023 is primarily due to the $1.9 million, or 8.3%, increase in Real property (excluding transient) revenue.

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SUN COMMUNITIES, INC.

Home Sales Summary

We sell new and pre-owned homes to current and prospective residents and customers in our communities. This inventory is purchased from manufacturers, lenders, dealers, former residents or customers.

The following table reflects certain financial and statistical information for our home sales program for the three months ended March 31, 2024 and 2023 (in millions, except for average selling price and statistical information):

	Three Months Ended
	March 31, 2024			March 31, 2023			Change			% Change
MH
Home sales	$	32.8		$	47.2		$	(14.4)		(30.5)	%
Home cost and selling expenses	26.2			36.0			(9.8)			(27.2)	%
NOI	$	6.6		$	11.2		$	(4.6)		(41.1)	%
NOI margin %	20.1		%	23.7		%	(3.6)		%
UK
Home sales	$	36.1		$	39.1		$	(3.0)		(7.7)	%
Home cost and selling expenses	25.7			26.6			(0.9)			(3.4)	%
NOI	$	10.4		$	12.5		$	(2.1)		(16.8)	%
NOI margin %	28.8		%	32.0		%	(3.2)		%
Total
Home sales	$	68.9		$	86.3		$	(17.4)		(20.2)	%
Home cost and selling expenses	51.9			62.6			(10.7)			(17.1)	%
NOI	$	17.0		$	23.7		$	(6.7)		(28.3)	%
NOI margin %	24.7		%	27.5		%	(2.8)		%
Units Sold:
MH	327			589			(262)			(44.5)	%
UK	621			589			32			5.4	%
Total home sales	948			1,178			(230)			(19.5)	%
Average Selling Price:
MH	$	100,306		$	80,136		$	20,170		25.2	%
UK homes	$	58,132		$	66,384		$	(8,252)		(12.4)	%

NOI - MH

For the three months ended March 31, 2024, the 41.1% decrease in NOI is primarily driven by a 44.5% decrease in total home sales volume as compared to the same period in 2023, partially offset by a 25.2% increase in average selling price.

NOI - UK

For the three months ended March 31, 2024, the 16.8% decrease in NOI is primarily driven by a 12.4% decrease in average selling price as compared to the same period in 2023, partially offset by a 5.4% increase in total home sales volume.

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SUN COMMUNITIES, INC.

Other Items - Statements of Operations(1)

The following table summarizes other income and expenses for the three months ended March 31, 2024 and 2023 (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023		Change		% Change
			As Restated
Service, retail, dining and entertainment, net	$	2.0	$	2.6	$	(0.6)	(23.1)	%
Interest income	$	4.6	$	11.4	$	(6.8)	(59.6)	%
Brokerage commissions and other, net	$	3.0	$	9.5	$	(6.5)	(68.4)	%
General and administrative expense	$	78.5	$	64.1	$	14.4	22.5	%
Catastrophic event-related charges, net	$	7.2	$	1.0	$	6.2	N/M
Business combinations	$	—	$	2.8	$	(2.8)	(100.0)	%
Depreciation and amortization	$	165.3	$	155.6	$	9.7	6.2	%
Asset impairments	$	20.7	$	2.4	$	18.3	N/M
Goodwill impairment	$	—	$	15.4	$	(15.4)	(100.0)	%
Loss on extinguishment of debt (see Note 9)	$	0.6	$	—	$	0.6	N/A
Interest expense	$	89.7	$	76.6	$	13.1	17.1	%
Interest on mandatorily redeemable preferred OP units / equity	$	—	$	1.0	$	(1.0)	(100.0)	%
Loss on remeasurement of marketable securities (see Note 16)	$	—	$	(19.9)	$	19.9	(100.0)	%
Gain / (loss) on foreign currency exchanges	$	1.1	$	(2.7)	$	3.8	N/M
Gain / (loss) on dispositions of properties	$	5.4	$	(1.6)	$	7.0	N/M
Other income / (expense), net	$	8.0	$	(1.0)	$	9.0	N/M
Loss on remeasurement of notes receivable (see Note 4)	$	(0.7)	$	(1.7)	$	1.0	58.8	%
Income / (loss) from nonconsolidated affiliates (see Note 7)	$	1.4	$	(0.2)	$	1.6	N/M
Income / (loss) on remeasurement of investment in nonconsolidated affiliates (see Note 7)	$	5.2	$	(4.5)	$	9.7	N/M
Current tax expense (see Note 13)	$	(2.1)	$	(3.9)	$	1.8	(46.2)	%
Deferred tax benefit (see Note 13)	$	5.7	$	4.6	$	1.1	23.9	%
Preferred return to preferred OP units / equity interests	$	3.2	$	2.4	$	0.8	33.3	%
Loss attributable to noncontrolling interests	$	(1.3)	$	(5.8)	$	4.5	(77.6)	%

(1)Only items determined by management to be material, of interest, or unique to the periods disclosed above are explained below.

N/M = Percentage change is not meaningful.

Interest income - for the three months ended March 31, 2024, decreased primarily due to having fewer loans outstanding to real estate operators than during the same period in 2023. Refer to Note 4, "Notes and Other Receivables," in our accompanying Consolidated Financial Statements for additional information.

Brokerage commissions and other, net - for the three months ended March 31, 2024, decreased primarily due to a decrease in the number of brokered home sales reducing total brokerage commissions as compared to the same period in 2023, and a decrease in dividend income as a result of the sale of our stake in the common shares of Ingenia in 2023. Refer to Note 16, "Fair Value Measurements," in our accompanying Consolidated Financial Statements for additional information.

General and administrative expense - for the three months ended March 31, 2024, increased primarily due to non-recurring transaction costs related to the settlement of a loan provided to a real estate operator, other costs associated with potential acquisitions that will not close, and an increase in payroll costs at our UK segment, as compared to the same periods in 2023.

Catastrophic event-related charges, net - for the three months ended March 31, 2024, increased primarily due to incremental asset impairment and debris removal charges of $4.7 million driven by flooding at an RV community in New Hampshire.

Business combinations - for the three months ended March 31, 2024, decreased primarily as a result of no new acquisitions accounted for as business combinations during 2024 as compared to such acquisitions in the same period in 2023. Refer to Note 3, "Real Estate Acquisitions and Dispositions," in our accompanying Consolidated Financial Statements for additional information.

Asset impairments - for the three months ended March 31, 2024, includes charges related to non-continuing expansion and development projects as well as the write off of other financial assets.

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Goodwill impairment - for the three months ended March 31, 2024, was zero as compared to goodwill impairment charges of $15.4 million related to the UK reporting segment during the same period in 2023. Refer to Note 6, "Goodwill and Other Intangible Assets," in our accompanying Consolidated Financial Statements for additional information.

Interest expense - for the three months ended March 31, 2024, increased due to a higher debt balance and higher weighted average interest rate as compared to the same period in 2023. Refer to Note 9, "Debt and Line of Credit," of our accompanying Consolidated Financial Statements for additional information.

Loss on remeasurement of marketable securities - for the three months ended March 31, 2024, was zero due to the sale of our publicly traded marketable securities in Ingenia in 2023, as compared to a loss of $19.9 million during the same period in 2023. Refer to Note 16, "Fair Value Measurements" in our accompanying Consolidated Financial Statements for additional information.

Gain / (loss) on foreign currency exchanges - for the three months ended March 31, 2024, was a gain of $1.1 million, as compared to a loss of $2.7 million during the same period in 2023 primarily due to the termination of the Pound sterling denominated term loan under our Senior Credit Facility in the current period. Refer to Note 9, "Debt and Line of Credit" in our accompanying Consolidated Financial Statements for additional information.

Gain / (loss) on dispositions of properties - for the three months ended March 31, 2024 was a gain of $5.4 million on the sale of two properties as compared to a loss of $1.6 million on the sale of two land parcels during the same period in 2023. Refer to Note 3, "Real Estate Acquisitions and Dispositions," in our accompanying Consolidated Financial Statements for additional information.

Other income / (expense), net - for the three months ended March 31, 2024, was a gain of $8.0 million primarily due to a litigation settlement gain of $10.3 million related to our Marina segment, as compared to a loss of $1.0 million related to long-term lease termination expenses during the same period in 2023.

Income / (loss) on remeasurement of investment in nonconsolidated affiliates - for the three months ended March 31, 2024, was a gain of $5.2 million as compared to a loss of $4.5 million during the same period in 2023 due to the fluctuation of the fair value of our nonconsolidated affiliates. Refer to Note 7, "Investments in Nonconsolidated Affiliates," in our accompanying Consolidated Financial Statements for additional information.

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SUN COMMUNITIES, INC.

RECONCILIATION OF NET LOSS ATTRIBUTABLE TO SUI COMMON SHAREHOLDERS TO FFO

The following table reconciles Net loss attributable to SUI common shareholders to FFO for the three months ended March 31, 2024 and 2023 (in millions, except for per share amounts):

	Three Months Ended
	March 31, 2024		March 31, 2023
			As Restated
Net Loss Attributable to SUI Common Shareholders	$	(27.4)	$	(44.9)
Adjustments
Depreciation and amortization	164.5		154.9
Depreciation on nonconsolidated affiliates	0.1		—
Asset impairments	20.7		2.4
Goodwill impairment	—		15.4
Loss on remeasurement of marketable securities	—		19.9
(Gain) / loss on remeasurement of investment in nonconsolidated affiliates	(5.2)		4.5
Loss on remeasurement of notes receivable	0.7		1.7
(Gain) / loss on dispositions of properties, including tax effect	(5.3)		3.5
Add: Returns on preferred OP units	2.1		2.1
Add: Loss attributable to noncontrolling interests	(0.9)		(5.7)
Gain on dispositions of assets, net	(5.4)		(7.9)
FFO Attributable to SUI Common Shareholders and Dilutive Convertible Securities(1)	$	143.9	$	145.9
Adjustments
Business combination expense	—		2.8
Acquisition and other transaction costs(2)	9.9		3.7
Loss on extinguishment of debt	0.6		—
Catastrophic event-related charges, net	7.2		1.0
Loss of earnings - catastrophic event-related charges, net(3)	5.3		5.5
(Gain) / loss on foreign currency exchanges	(1.1)		2.7
Other adjustments, net(4)	(12.4)		(3.6)
Core FFO Attributable to SUI Common Shareholders and Dilutive Convertible Securities(1)	$	153.4	$	158.0
Weighted Average Common Shares Outstanding - Diluted	128.7		128.2
FFO Attributable to SUI Common Shareholders and Dilutive Convertible Securities Per Share	$	1.12	$	1.14
Core FFO Attributable to SUI Common Shareholders and Dilutive Convertible Securities Per Share	$	1.19	$	1.23

(1)Excludes the effect of certain anti-dilutive convertible securities.

(2)These costs represent (i) nonrecurring integration expenses associated with acquisitions during the three months ended March 31, 2024, and 2023, (ii) costs associated with potential acquisitions that will not close, (iii) expenses incurred to bring recently acquired properties up to our operating standards, including items such as tree trimming and painting costs that do not meet our capitalization policy.

(3)Loss of earnings - catastrophic event-related charges, net include the following:

	Three Months Ended
	March 31, 2024		March 31, 2023
Hurricane Ian - Three Fort Myers, Florida RV communities impaired
Estimated loss of earnings in excess of the applicable business interruption deductible	$	5.3	$	5.3
Hurricane Irma - Three Florida Keys communities impaired
Estimated loss of earnings in excess of the applicable business interruption deductible	—		0.2
Loss of earnings - catastrophic event-related charges, net	$	5.3	$	5.5

(4)Other adjustments, net relates primarily to (i) litigation settlement gain during the three months ended March 31, 2024, and (ii) deferred tax benefit during the three months ended March 31, 2024 and 2023.

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SUN COMMUNITIES, INC.

LIQUIDITY AND CAPITAL RESOURCES

Short-term Liquidity

Our principal short-term liquidity demands historically have been, and are expected to continue to be, distributions to our shareholders and the unit holders of the Operating Partnership, property acquisitions, development and expansion of our properties, capital improvement of our properties, the purchase of new and pre-owned homes, and debt repayment. We intend to meet our short-term liquidity requirements through available cash balances, cash flow generated from operations, draws on our Senior Credit Facility, and the use of debt and equity offerings under our shelf registration statement. Refer to Note 9, "Debt and Line of Credit," and Note 10, "Equity and Temporary Equity," in our accompanying Consolidated Financial Statements for additional information.

We also intend to continue to strengthen our capital and liquidity positions by focusing on our core fundamentals, which are generating positive cash flows from operations, maintaining appropriate debt levels and leverage ratios, and controlling overhead costs. We take a disciplined approach to selecting the optimal mix of financing sources to meet our liquidity demands and minimize our overall cost of capital. Our investment grade credit ratings remain unchanged from the initial rating. We plan to continue to capitalize on our unsecured bond market access to optimize our cost of capital and increase our financial flexibility.

Current market and economic conditions, including relating to, among other things, interest rates, currency fluctuations, equity valuations and inflation, may adversely affect our ability to obtain debt and equity capital in the short term on attractive terms.

Since our initial public offering in 1993, we have demonstrated operational reliability and cash flow strength throughout economic cycles. Our current objectives include streamlining our operations with an emphasis on our reliable real property income. We recognize the headwinds we are facing from a challenging macroeconomic environment and are re-aligning our strategy to focus on our proven, durable income streams. We are positioned for ongoing organic growth with expected rental rate increases, occupancy gains and expense management. In 2024, we expect rental rate growth that exceeds headline inflation with ongoing focus on expense management to continue generating strong organic cash flow growth.

Given a macroeconomic backdrop of sustained higher interest rates, we intend to prioritize debt reduction as our primary use of free cash flow from our operations and of proceeds from selective capital recycling. In addition, we are reducing our development activity considering the more challenging macroeconomic and capital market environment. Capital spending besides projects that are underway will be solely focused on the most strategic opportunities. We also attempt to manage interest rate risks by using interest rate hedging instruments and by monitoring our overall leverage levels. We engage in certain hedging transactions to limit our exposure from the adverse effects of changes in interest rates on borrowing costs of our loans.

Acquisition, development and expansion activities

Subject to market conditions, we intend to selectively identify opportunities to expand our development pipeline and acquire existing properties. We finance acquisitions through available cash, secured financing, draws on our Senior Credit Facility, the assumption of existing debt on properties and the issuance of debt and equity securities. The current higher interest rate environment makes it more expensive to finance acquisitions and fund developments and expansion. We will continue to very selectively pursue acquisition and development opportunities that meet our underwriting criteria.

During the three months ended March 31, 2024, we did not acquire any new operating properties. During the same period, we entered into a ground lease to support one marina with eight wet slips and dry storage spaces. Subsequent to the three months ended March 31, 2024, we acquired three marinas with an aggregate 185 wet slips and dry storage spaces for an aggregate purchase price of approximately $12.0 million.

During the three months ended March 31, 2024, we acquired two land parcels located in the U.S. for $12.9 million. The parcels can accommodate the potential development of over 1,100 sites. We also expanded one of our existing communities by nearly 30 sites and delivered 70 sites at one ground-up development property.

We continue to selectively expand our properties utilizing our inventory of owned and entitled land. We have 18,510 MH and RV sites suitable for future development.

Refer to Note 3, "Real Estate Acquisitions and Dispositions," in our accompanying Consolidated Financial Statements for additional detail on acquisitions completed to date.

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SUN COMMUNITIES, INC.

Capital Expenditures (excluding Acquisition costs)

Our capital expenditures include lot modifications, growth projects, rebranding, acquisition-related capital expenditures, expansion and development construction costs, rental home purchases and recurring capital expenditures.

Our capital expenditure activity is summarized as follows (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Recurring Capital Expenditures	$	30.0	$	20.8
Non-Recurring Capital Expenditures and Related Activities
Lot Modifications	6.9		11.3
Growth Projects	30.9		29.7
Rebranding	2.2		2.0
Capital improvements to recent acquisitions	22.5		71.6
Expansion and Development	41.1		89.1
Rental Program	34.3		77.3
Other	(7.3)		—
Total Non-Recurring Capital Expenditure and Related Activities	130.6		281.0
Total Capital Expenditure and Related Activities	$	160.6	$	301.8

Recurring capital expenditures

Property recurring capital expenditures are necessary to maintain asset quality, including purchasing and replacing items used to operate the communities and marinas. Recurring capital expenditures at our MH, RV and UK properties include major road, driveway and pool improvements; clubhouse renovations; adding or replacing streetlights; playground equipment; signage; maintenance facilities; manager housing and property vehicles. Recurring capital expenditures at our marinas include dredging, dock repairs and improvements, and equipment maintenance and upgrades. The minimum capitalized amount is five hundred dollars.

Non-Recurring Capital Expenditures and Related Activities

Lot modifications - lot modification capital expenditures are incurred to modify the foundational structures required to set a new home after a previous home has been removed. These expenditures are necessary to create a revenue stream from a new site renter and often improve the quality of the community. Other lot modification expenditures include land improvements added to annual RV sites to aid in the conversion of transient RV guests to annual contracts.

Growth projects - growth projects consist of revenue generating or expense reducing activities at the properties. These include, but are not limited to, utility efficiency and renewable energy projects, site, slip or amenity upgrades such as the addition of a garage, shed or boat lift, and other special capital projects that substantiate an incremental rental increase.

Rebranding - rebranding includes new signage at our RV communities and the costs of building an RV mobile application and updated website.

Capital improvements subsequent to acquisition - often require 24 to 36 months to complete after closing and include upgrading clubhouses; landscaping; new street light systems; new mail delivery systems; pool renovations including larger decks, heaters and furniture; new maintenance facilities; lot modifications; and new signage including main signs and internal road signs.

Expansion and development expenditures - consist primarily of construction costs such as roads, activities, and amenities, and costs necessary to complete site improvements, such as driveways, sidewalks and landscaping at our MH, RV and UK communities. Expenditures also include costs to rebuild after damage has been incurred at MH, RV, marina or UK properties, and research and development.

Rental program - consists of investment in the acquisition of homes intended for the Rental Program and the purchase of vacation rental homes at our RV communities. Expenditures for these investments depend upon the condition of the markets for repossessions and new home sales, rental homes and vacation rental homes.

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SUN COMMUNITIES, INC.

Cash Flow Activities

Our cash flow activities are summarized as follows (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Net Cash Provided By Operating Activities	$	242.5	$	194.5
Net Cash Used For Investing Activities	$	(127.1)	$	(321.9)
Net Cash Provided By / (Used For) Financing Activities	$	(25.4)	$	111.6
Effect of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	$	(0.2)	$	0.2

Cash, cash equivalents and restricted cash increased by $89.8 million from $42.7 million as of December 31, 2023, to $132.5 million as of March 31, 2024.

Operating activities - Net cash provided by operating activities increased by $48.0 million to $242.5 million for the three months ended March 31, 2024, compared to $194.5 million for the three months ended March 31, 2023. The increase in operating cash flow was primarily due to improved Same Property operating performance at our MH and RV communities, marinas, and UK communities, partially offset by an increase in interest expense during the three months ended March 31, 2024 as compared to the corresponding period in 2023.

Our net cash flows provided by operating activities from continuing operations may be adversely impacted by, among other things:

•the market and economic conditions in our current markets generally, and specifically in the metropolitan areas of our current markets;

•lower occupancy and rental rates of our properties;

•substantial increases in insurance premiums;

•increases in other operating costs, such as wage and benefit costs, real estate taxes and utilities;

•decreased sales of manufactured homes;

•current volatility in economic conditions and the financial markets; and

•the effects of outbreaks of disease and related restrictions on business operations.

See "Risk Factors" in Part I, Item 1A of our 2023 Annual Report.

Investing activities - Net cash used for investing activities decreased by $194.8 million to $127.1 million for the three months ended March 31, 2024, compared to $321.9 million for the three months ended March 31, 2023. The decrease in Net cash used for investing activities was primarily driven by a decrease in cash deployed to invest in existing properties and acquire new properties, and proceeds received from the disposition of two MH properties during the three months ended March 31, 2024 as compared to the corresponding period in 2023. Refer to the Consolidated Statements of Cash Flows for detail on the net cash used for investing activities during the three months ended March 31, 2024 and 2023. Refer to Note 3, "Real Estate Acquisitions and Dispositions," and Note 20, "Subsequent Events," in our accompanying Consolidated Financial Statements for additional information on acquisitions and investment activity subsequent to March 31, 2024.

Financing activities - Net cash used for financing activities was $25.4 million for the three months ended March 31, 2024, compared to net cash provided by financing activities of $111.6 million for the three months ended March 31, 2023. The change in Net cash provided by / (used for) financing activities was primarily driven by a decrease in net new borrowings during the three months ended March 31, 2024 as compared to the corresponding period in 2023 as part of our strategy to optimize the strength of our balance sheet. Refer to the Consolidated Statements of Cash Flows for detail on the net cash provided by financing activities during the three months ended March 31, 2024 and 2023. Refer to Note 9, "Debt and Line of Credit," in our accompanying Consolidated Financial Statements for additional information.

We are exposed to interest rate variability associated with our outstanding floating rate debt and any maturing debt that has to be refinanced. Interest rate movements impact our borrowing costs and, while as of March 31, 2024, approximately 89% of our total debt was fixed rate financing, including the impact of hedge activity, increases in interest costs are likely to adversely affect our financial results.

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SUN COMMUNITIES, INC.

Equity and Debt Activity

At the Market Offering Sales Agreement

We have entered into an At the Market Offering Sales Agreement (the "ATM") with certain sales agents and forward sellers pursuant to which we may sell, from time to time, up to an aggregate gross sales price of $1.25 billion of our common stock through the sales agents, acting as our sales agents or, if applicable, as forward sellers, or directly to the sales agents as principals for their own accounts. Through March 31, 2024, we had entered into forward sales agreements under the ATM for an aggregate gross sales price of $160.6 million.

Marketable Securities

In October 2023, we sold our 41.8 million share position in Ingenia, generating $102.5 million of proceeds, net of underwriting and other fees, with a realized loss of $8.0 million. The proceeds were used to pay down amounts drawn under our Senior Credit Facility.

Secured Debt

During the three months ended December 31, 2023, we entered into new mortgage term loans for $252.8 million that mature in November 1, 2030 and bear interest at a fixed rate of 6.49%. As a result of the new mortgage term loans, two additional properties were encumbered. We used the proceeds to repay $117.8 million of mortgage term loans that matured on November 30, 2023 and pay down amounts drawn under our Senior Credit Facility. The effective interest rate on the new secured loans is 6.251% inclusive of the impact of the aforementioned terminated swap of $50.0 million.

During the three months ended March 31, 2023, we entered into mortgage term loans totaling $184.1 million related to 27 properties which mature between February 13, 2026 and April 1, 2033, and have a weighted average fixed interest rate of 5.39%. We used the net proceeds to repay borrowings outstanding under our Senior Credit Facility.

Senior Unsecured Notes

The following table sets forth certain information regarding our outstanding senior unsecured notes (in millions). All senior unsecured notes include interest payments on a semi-annual basis in arrears.

			Carrying Amount
	Principal Amount		March 31, 2024		December 31, 2023
5.5% notes, issued in January 2024 and due in January 2029(1)	$	500.0	$	495.6	$	—
5.7% notes, issued in January 2023 and due in January 2033	400.0		395.8		395.7
4.2% notes, issued in April 2022 and due in April 2032	600.0		592.7		592.6
2.3% notes, issued in October 2021 and due in November 2028	450.0		447.0		446.8
2.7% notes, issued in June 2021 and October 2021, and due in July 2031	750.0		742.6		742.4
Total	$	2,700.0	$	2,673.7	$	2,177.5

(1) In January 2024, the Operating Partnership issued $500.0 million of senior unsecured notes with an interest rate of 5.5% and a five-year term, due January 15, 2029. Interest on the notes is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2024. The net proceeds from the offering were $495.4 million, after deducting underwriters' discounts and estimated offering expenses. We used the majority of the net proceeds to repay borrowings outstanding under our Senior Credit Facility.

The obligations of the Operating Partnership to pay principal, premiums, if any, and interest on our senior unsecured notes are guaranteed on a senior basis by Sun Communities, Inc. The guarantee is full and unconditional, and the Operating Partnership is a consolidated subsidiary of the Company. Under Rule 3-10 of Regulation S-X, as amended, subsidiary issuers of obligations guaranteed by its parent company are not required to provide separate financial statements, provided that the subsidiary obligor is consolidated into the parent company's consolidated financial statements, the parent guarantee is "full and unconditional" and, subject to certain exceptions, the alternative disclosure required by Rule 13-01 is provided, which includes narrative disclosure and summarized financial information. Accordingly, separate consolidated financial statements of the Operating Partnership have not been presented. Furthermore, as permitted under Rule 13-01(a)(4)(vi), we have excluded the summarized financial information for the Operating Partnership as the assets, liabilities and results of operations of the Operating Partnership are not materially different from the corresponding amounts presented in our consolidated financial statements and management believes such summarized financial information would be repetitive and not provide incremental value to investors.

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SUN COMMUNITIES, INC.

Line of Credit

The Operating Partnership (as borrower), SUI (as guarantor), and certain lenders are parties to a credit agreement which governs our Senior Credit Facility.

Prior to March 2024, the aggregate amount of our Senior Credit Facility was $4.2 billion with the ability to upsize the total borrowings by an additional $800.0 million, subject to certain conditions. The aggregate amount under the Senior Credit Facility consisted of the following: (a) a revolving loan in an amount up to $3.05 billion and (b) a term loan facility of $1.15 billion, with the ability to draw funds from the combined facilities in U.S. dollars, Pound sterling, Euros, Canadian dollars and Australian dollars, subject to certain limitations. The maturity date of the revolving term loan facility is April 7, 2026. At our option that maturity date may be extended two additional six-month periods. The maturity date of the term loan facility was April 7, 2025.

In March 2024, we terminated the term loan facility and settled the associated $1.1 billion of borrowings outstanding under the term loan by increasing our borrowings under the revolving loan of the Senior Credit Facility. Subsequent to the termination of the term loan, our aggregate borrowing capacity under the Senior Credit Facility was reduced to the original capacity under the revolving loan of $3.05 billion. During the three months ended March 31, 2024, we recognized a Loss on extinguishment of debt in our Consolidated Statements of Operations of $0.6 million related to the termination of the term loan facility.

The Senior Credit Facility bears interest at a floating rate based on the Adjusted Term SOFR, the Adjusted Eurocurrency Rate, the Australian BBSY, the Daily SONIA Rate or the Canadian Dollar Offered Rate, as applicable, plus a margin, in all cases, which can range from 0.725% to 1.6%, subject to certain adjustments. As of March 31, 2024, the margins based on our credit ratings were 0.85% on the revolving loan facility.

At the lenders' option, the Senior Credit Facility will become immediately due and payable upon an event of default under the Credit Facility Agreement. We had $1.7 billion and $944.1 million of borrowings outstanding under the revolving loan as of March 31, 2024 and December 31, 2023, respectively. We also had zero and $1.1 billion of borrowings outstanding under the term loan on the Senior Credit Facility as of March 31, 2024 and December 31, 2023, respectively. These balances are recorded in Unsecured debt on the Consolidated Balance Sheets.

The Senior Credit Facility provides us with the ability to issue letters of credit. Our issuance of letters of credit does not increase our borrowings outstanding under the Senior Credit Facility, but does reduce the borrowing amount available. We had $11.2 million and $26.2 million of outstanding letters of credit at March 31, 2024 and December 31, 2023, respectively.

Financial Covenants

Pursuant to the terms of the Senior Credit Facility, we are subject to various financial and other covenants. The most restrictive financial covenants for the Senior Credit Facility are as follows:

Covenant	Requirement	As of March 31, 2024
Maximum leverage ratio	<65.0%	34.2%
Minimum fixed charge coverage ratio	>1.40	3.08
Maximum secured leverage ratio	<40.0%	12.9%

In addition, we are required to maintain the following covenants with respect to the senior unsecured notes payable:

Covenant	Requirement	As of March 31, 2024
Total debt to total assets	≤60.0%	41.5%
Secured debt to total assets	≤40.0%	18.5%
Consolidated income available for debt service to debt service	≥1.50	3.84
Unencumbered total asset value to total unsecured debt	≥150.0%	334.6%

As of March 31, 2024, we were in compliance with the above covenants and do not anticipate that we will be unable to meet these covenants in the near term.

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Derivative Transactions

We enter into treasury rate lock contracts, interest rate swaps, and forward swaps for interest rate risk management purposes. We do not enter into derivative instruments for speculative purposes. The risks being hedged are the interest rate risk related to outstanding floating rate debt and forecasted debt issuance transactions, and the benchmark interest rates used are the SOFR and the SONIA Rate.

During the three months ended March 31, 2024, we entered into one interest rate swap contract with a notional value of $25.0 million to hedge interest rate risk associated with a future debt offering.

During the three months ended March 31, 2024, in connection with the issuance of $500.0 million of senior unsecured notes with an interest rate of 5.5% and a five-year term, due January 15, 2029, we settled seven forward swap contracts totaling $255.0 million and paid a net settlement payment of $2.3 million to several counterparties. Refer to Note 15, "Derivative Financial Instruments," in our accompanying Consolidated Financial Statements for additional information.

During the year ended December 31, 2023, we entered into derivative contracts with aggregate notional amounts of $582.3 million and terminated derivative contracts with aggregate notional amounts of $300.0 million and received an aggregate cash settlement of $13.4 million.

Long-term Financing and Capital Requirements

Long-term Financing

We anticipate meeting our long-term liquidity requirements, such as scheduled debt maturities, large property acquisitions, expansion and development of properties, other nonrecurring capital improvements and Operating Partnership unit redemptions through long-term unsecured and secured debt and the issuance of certain debt or equity securities subject to market conditions. If current market and economic conditions, including relating to, among other things, interest rates, currency fluctuations, equity valuations and inflation, continue or worsen, our ability to obtain debt and equity capital in the long term on attractive terms may be adversely affected.

As of March 31, 2024 we had unrestricted cash on hand of $118.9 million, $1.3 billion of remaining capacity on the Senior Credit Facility, and a total of 509 unencumbered MH, RV, marina and UK properties.

From time to time, we may also issue shares of our capital stock, issue equity units in our Operating Partnership, issue unsecured notes, obtain other debt financing or sell selected assets. Our ability to finance our long-term liquidity requirements in such a manner will be affected by numerous economic factors affecting the MH, RV and marina industries at the time, including the availability and cost of mortgage debt, our financial condition, the operating history of the properties, the state of the debt and equity markets, and the general national, regional and local economic conditions. When it becomes necessary for us to approach the credit markets, the volatility in those markets could make borrowing more difficult to secure, more expensive or effectively unavailable. In the event our current credit ratings are downgraded, it may become difficult or more expensive to obtain additional financing or refinance existing unsecured debt as maturities become due. See "Risk Factors" in Part I, Item 1A of our 2023 Annual Report. If we are unable to obtain additional debt or equity financing on acceptable terms, our business, results of operations and financial condition would be adversely impacted.

As of March 31, 2024, our net debt to enterprise value was 31.7% (assuming conversion of all common and preferred OP units to shares of common stock). Our debt has a weighted average interest rate of 4.21% and a weighted average years to maturity of 6.8.

Capital Requirements

Certain of our nonconsolidated affiliates, which are accounted for under the equity-method of accounting, have incurred debt. We have not guaranteed the debt of our nonconsolidated affiliates in the arrangements referenced below, nor do we have any obligations to fund this debt should the nonconsolidated affiliates be unable to do so. Refer to Note 7, "Investments in Nonconsolidated Affiliates," in the accompanying Consolidated Financial Statements for additional information about these entities.

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GTSC - During September 2019, GTSC entered into a warehouse line of credit with a maximum loan amount of $125.0 million. The line of credit was subsequently amended, with the maximum amount increased to $325.0 million as of December 31, 2022, with an option to increase to $375.0 million subject to the lender's consent. As of March 31, 2024 and December 31, 2023, the aggregate carrying amount of debt, including both our and our partner's share, incurred by GTSC was $267.5 million (of which our proportionate share is $107.0 million), and $261.3 million (of which our proportionate share is $104.5 million), respectively. The debt bears interest at a variable rate based on a Commercial Paper or adjusted SOFR plus a margin ranging from 1.65% to 2.5% per annum and matures on December 15, 2026.

Sungenia JV - During May 2020, Sungenia JV, entered into a debt facility agreement with a maximum loan amount of $27.0 million Australian dollars, or $17.6 million converted at the March 31, 2024 exchange rate. During July 2022, the maximum amount was increased to $50.0 million Australian dollars, or $32.6 million converted at the March 31, 2024 exchange rate. As of March 31, 2024 and December 31, 2023, the aggregate carrying amount of the debt, including both our and our partners' share, incurred by Sungenia JV was $26.3 million (of which our proportionate share is approximately $13.1 million), and $25.2 million (of which our proportionate share is $12.6 million), respectively. The debt bears interest at a variable rate based on the BBSY rate plus a margin ranging from 1.35% to 1.4%, subject to adjustment for additional future commitments, per annum and matures on June 30, 2027.

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CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

This report contains various "forward-looking statements" within the meaning of the Securities Act of 1933, as amended (the "Securities Act"), and the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and we intend that such forward-looking statements will be subject to the safe harbors created thereby. For this purpose, any statements contained in this document that relate to expectations, beliefs, projections, future plans and strategies, trends or prospective events or developments and similar expressions concerning matters that are not historical facts are deemed to be forward-looking statements. Words such as "forecasts," "intends," "intend," "intended," "goal," "estimate," "estimates," "expects," "expect," "expected," "project," "projected," "projections," "plans," "predicts," "potential," "seeks," "anticipates," "anticipated," "should," "could," "may," "will," "designed to," "foreseeable future," "believe," "believes," "scheduled," "guidance," "target" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these words. These forward-looking statements reflect our current views with respect to future events and financial performance, but involve known and unknown risks and uncertainties, both general and specific to the matters discussed in this document, some of which are beyond our control. These risks and uncertainties and other factors may cause our actual results to be materially different from any future results expressed or implied by such forward-looking statements. In addition to the risks disclosed under "Risk Factors" in our 2023 Annual Report, and in our other filings with the SEC, from time to time, such risks, uncertainties and other factors include, but are not limited to:

∙	Changes in general economic conditions, including inflation, deflation, energy costs, the real estate industry and the markets within which we operate;
∙	Difficulties in our ability to evaluate, finance, complete and integrate acquisitions, developments and expansions successfully;
∙	Our liquidity and refinancing demands;
∙	Our ability to obtain or refinance maturing debt;
∙	Our ability to maintain compliance with covenants contained in our debt facilities and our unsecured notes;
∙	Availability of capital;
∙	Outbreaks of disease and related restrictions on business operations;
∙	Changes in foreign currency exchange rates, including between the U.S. dollar and each of the Canadian dollar, Australian dollar and Pound sterling;
∙	Our ability to maintain rental rates and occupancy levels;
∙	Our ability to maintain effective internal control over financial reporting and disclosure controls and procedures;
∙	Our remediation plan and our ability to remediate the material weaknesses in our internal control over financial reporting;
∙	Expectations regarding the amount or frequency of impairment losses, including as a result of the write-down of intangible assets, including goodwill;
∙	Increases in interest rates and operating costs, including insurance premiums and real estate taxes;
∙	Risks related to natural disasters such as hurricanes, earthquakes, floods, droughts and wildfires;
∙	General volatility of the capital markets and the market price of shares of our capital stock;
∙	Our ability to maintain our status as a REIT;
∙	Changes in real estate and zoning laws and regulations;
∙	Legislative or regulatory changes, including changes to laws governing the taxation of REITs;
∙	Litigation, judgments or settlements, including costs associated with prosecuting or defending claims and any adverse outcomes;
∙	Competitive market forces;
∙	The ability of purchasers of manufactured homes and boats to obtain financing; and
∙	The level of repossessions by manufactured home and boat lenders.

Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date the statement was made. We undertake no obligation to publicly update or revise any forward-looking statements included or incorporated by reference into this document, whether as a result of new information, future events, changes in our expectations or otherwise, except as required by law.

Although we believe that the expectations reflected in the forward-looking statements are reasonable, we cannot guarantee future results, levels of activity, performance or achievements. All written and oral forward-looking statements attributable to us or persons acting on our behalf are qualified in their entirety by these cautionary statements.

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ITEM 3.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market risk is the exposure to loss resulting from changes in market factors such as interest rates, foreign currency exchange rates, commodity prices and equity prices.

Interest Rate Risk

Our principal market risk exposure is interest rate risk. We mitigate this risk by maintaining prudent amounts of leverage, minimizing capital costs and interest expense while continuously evaluating all available debt and equity resources and following established risk management policies and procedures, which include the periodic use of derivatives. Our primary strategy in entering into derivative contracts is to minimize the variability that interest rate changes could have on our future cash flows. From time to time, we employ derivative instruments that effectively convert a portion of our variable rate debt to fixed rate debt. We do not enter into derivative instruments for speculative purposes.

Our variable rate debt totaled $895.5 million and $1.2 billion as of March 31, 2024 and 2023 respectively, after adjusting for the impact of hedging in place through the use of interest rate swaps. As of March 31, 2024 and 2023, our variable debt bore interest at the Adjusted Term SOFR, the Adjusted Eurocurrency Rate, the Australian BBSY rate, the Daily SONIA Rate or the Canadian Dollar Offered Rate, and the Eurodollar rate or Prime rate plus a margin. If the above rates increased or decreased by 1.0%, our interest expense would have increased or decreased by $2.4 million and $3.5 million for the three months ended March 31, 2024 and 2023, respectively, based on the $968.9 million and $1.4 billion average balance outstanding under our variable rate debt facilities, respectively. Our variable rate debt, interest expense and average balance outstanding under our variable rate debt facility includes the impact of hedge activity.

Foreign Currency Exchange Rate Risk

Foreign currency exchange rate risk is the risk that fluctuations in currencies against the U.S. dollar will negatively impact our results of operations. We are exposed to foreign currency exchange rate risk as a result of remeasurement and translation of the assets and liabilities of our properties in the United Kingdom and Canada, and our joint venture in Australia, into U.S. dollars. Fluctuations in foreign currency exchange rates can therefore create volatility in our results of operations and may adversely affect our financial condition.

At March 31, 2024 and December 31, 2023, our shareholder's equity included $836.3 million and $893.9 million from our investments and operations in the United Kingdom, Canada and Australia which collectively represented 11.9% and 12.5% of total shareholder's equity, respectively. Based on our sensitivity analysis, a 10.0% strengthening of the U.S. dollar against the Pound sterling, Canadian dollar and Australian dollar would have caused a reduction of $83.6 million and $89.4 million to our total shareholder's equity at March 31, 2024 and December 31, 2023, respectively.

Capital Market Risk

We are exposed to risks related to the equity capital markets, and our related ability to raise capital through the issuance of our common stock or other equity instruments. We are also exposed to risks related to the debt capital markets, and our related ability to finance our business through borrowings under other financing arrangements. As a REIT, we are required to distribute a significant portion of our taxable income annually, which constrains our ability to accumulate operating cash flow and therefore requires us to utilize debt or equity capital to finance our business. We seek to mitigate these risks by monitoring the debt and equity capital markets to inform our decisions on the amount, timing and terms of capital we raise.

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ITEM 4.  CONTROLS AND PROCEDURES

Evaluation of disclosure controls and procedures

We maintain disclosure controls and procedures designed to provide reasonable assurance that information required to be disclosed in reports filed under the Exchange Act is recorded, processed, summarized and reported within the specified time periods and accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures (pursuant to Rules 13a-15(e) or 15d-15(e) of the Exchange Act) at March 31, 2024. Based upon this evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were not effective because of the material weaknesses in internal control over financial reporting described below. These material weaknesses have not been remediated as of March 31, 2024.

Material Weaknesses in Internal Control Over Financial Reporting

A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of our annual or interim financial statements will not be prevented or detected on a timely basis.

As described in Part II, Item 9A "Controls and Procedures" of our 2023 Annual Report, as of December 31, 2023, management identified a material weakness relating to the design of management's review controls of potential triggering events related to the evaluation for impairment of goodwill relating to our Park Holidays business within the UK reporting segment.

Subsequent to the quarter ended March 31, 2024, management identified a material weakness relating to the design of management's review controls of the testing for long-lived asset impairments as of March 31, 2024, relating to certain other properties within the UK reporting segment. Management has concluded that this material weakness did not create any material misstatement to previously issued financial statements for any prior periods or the current period.

Remediation of Material Weaknesses

The Company and its Board of Directors are committed to maintaining a strong internal control environment. Management, with oversight from the Audit Committee of the Board of Directors, has developed, and is implementing, a comprehensive plan to remediate the material weaknesses. Remediation efforts are focused on more rigorous policies and procedures and sufficiency of reviews for the Company's evaluation of impairment for goodwill and long-lived assets. These efforts will include enhanced education and training from third party specialists, development of a continuous process for monitoring, assessment and communication, as well as involvement of additional key stakeholders in reviews.

Management believes the measures described above will remediate the material weaknesses that we have identified. As management continues to evaluate and improve our disclosure controls and procedures and internal control over financial reporting, we may decide to take additional measures to address control deficiencies or determine to modify certain of the remediation measures identified.

We will not be able to conclude whether these efforts will fully remediate the material weaknesses until the updated controls have operated for a sufficient period of time and management has concluded, through testing, that such controls are operating effectively.

Changes in internal control over financial reporting

During the quarter ended March 31, 2024, we launched and adopted a new integrated ERP system, which replaced many of our existing core financial systems. The system enhances efficiencies and simplifies our accounting and reporting processes. In conjunction with the implementation of the ERP system, our internal processes, procedures and controls have been updated accordingly.

Except as discussed in the preceding paragraph and above under "Remediation of Material Weaknesses," there were no changes in internal control over financial reporting during the quarter ended March 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II – OTHER INFORMATION

ITEM 1.  LEGAL PROCEEDINGS

Legal Proceedings

We are involved in various legal proceedings. Refer to "Legal Proceedings" in Part 1 - Item 1 - Note 17, "Commitments and Contingencies," in our accompanying Notes to the Consolidated Financial Statements.

Environmental Matters

Item 103 of Regulation S-K requires disclosure of certain environmental matters when a governmental authority is a party to the proceedings and such proceedings involve potential monetary sanctions that we reasonably believe will exceed an applied threshold not to exceed $1.0 million. Applying this threshold, there are no environmental matters to disclose for the three months ended March 31, 2024.

ITEM 1A. RISK FACTORS

In addition to the other information set forth in this report, you should carefully consider the risk factors described in Part 1, Item 1A., "Risk Factors," in our 2023 Annual Report, which could materially affect our business, financial condition or future results. There have been no material changes to the disclosure on these matters as set forth in such report.

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ITEM 2.  UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Holders of our OP units have converted the following units during the three months ended March 31, 2024:

		Three Months Ended
		March 31, 2024
Series	Conversion Rate	Units / Shares Converted	Common Stock(1)
Common OP units	1.0000	55,781	55,781
Series A-1 preferred OP units	2.4390	10,332	25,195
Series C preferred OP units	1.1100	100	111
Series G preferred OP units	0.6452	4,898	3,160
Series H preferred OP units	0.6098	9	5

(1)Calculation may yield minor differences due to rounding incorporated in the above numbers.

All of the securities described above were issued in private placements in reliance on Section 4(a)(2) of the Securities Act, including Regulation D promulgated thereunder. No underwriters were used in connection with any of such issuances.

Purchases of Equity Securities

The following table summarizes our common stock repurchases during the three months ended March 31, 2024:

	Total number of shares purchased	Average price paid per share		Total number of shares purchased as part of publicly announced plans or programs	Maximum number (or approximate dollar value) of shares that may yet be purchased under the plans or programs
Period	(a)	(b)		(c)	(d)
January 1, 2024 - January 31, 2024	875	$	131.24	—	$	—
February 1, 2024 - February 29, 2024	21,666	$	130.19	—	$	—
March 1, 2024 - March 31, 2024	35,673	$	131.28	—	$	—
Total	58,214	$	130.87	—	$	—

During the three months ended March 31, 2024, we withheld 58,214 shares from employees to satisfy estimated statutory income tax obligations related to vesting of restricted stock awards. The value of the common stock withheld was based on the closing price of our common stock on the applicable vesting date.

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ITEM 6.  EXHIBITS

Exhibit No.	Description	Method of Filing
3.1	Sun Communities, Inc. Articles of Restatement	Incorporated by reference to Exhibit 3.1 to Sun Communities, Inc.'s Annual Report on Form 10-K filed on February 22, 2018
3.2	Fourth Amended and Restated Bylaws	Incorporated by reference to Exhibit 3.1 to Sun Communities, Inc.'s Current Report on Form 8-K filed on February 21, 2023
3.3	Sun Communities, Inc. Articles of Amendment effective May 18, 2023	Incorporated by reference to Exhibit 3.1 to Sun Communities, Inc.'s Current Report on Form 8-K filed on May 19, 2023
4.1	Indenture, dated as of June 28, 2021 by and between Sun Communities Operating Limited Partnership and UMB Bank, N.A. as trustee.	Incorporated by reference to Exhibit 4.1 to Sun Communities, Inc.'s Current Report on Form 8-K filed on June 28, 2021
4.2	Fifth Supplemental Indenture, dated as of January 11, 2024 by and among Sun Communities Operating Limited Partnership, Sun Communities, Inc., and UMB Bank, N.A. as trustee.	Incorporated by reference to Exhibit 4.2 of Sun Communities, Inc.'s Current Report on Form 8-K filed on January 11, 2024
4.3	Form of Global Note for 5.500% Notes due 2029	Incorporated by reference to Exhibit 4.3 of Sun Communities, Inc.'s Current Report on Form 8-K filed on January 11, 2024
10.1	Cooperation Agreement, dated February 15, 2024, by and between Sun Communities, Inc. and Land & Buildings Investment Management LLC.	Incorporated by reference to Exhibit 10.1 of Sun Communities, Inc.'s Current Report on Form 8-K filed on February 16, 2024
10.2#	First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Fernando Castro-Caratini dated March 20, 2024	Incorporated by reference to Exhibit 10.1 of Sun Communities, Inc.'s Current Report on Form 8-K filed on March 21, 2024
10.3#	Third Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Bruce Thelen dated March 20, 2024	Incorporated by reference to Exhibit 10.2 of Sun Communities, Inc.'s Current Report on Form 8-K filed on March 21, 2024
10.4#	First Amendment to Employment Agreement among Sun Communities, Inc., Sun Communities Operating Limited Partnership and Marc Farrugia dated March 20, 2024	Incorporated by reference to Exhibit 10.3 of Sun Communities, Inc.'s Current Report on Form 8-K filed on March 21, 2024
22.1	List of issuers of guaranteed securities	Filed herewith
31.1	Certification of Chief Executive Officer pursuant to Securities Exchange Act Rules 13a-14(a)/15(d)-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.	Filed herewith
31.2	Certification of Chief Financial Officer pursuant to Securities Exchange Act Rules 13a-14(a)/15(d)-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.	Filed herewith
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.	Filed herewith

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Exhibit No.	Description	Method of Filing
101.INS	XBRL Instance Document	The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document	Filed herewith
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document	Filed herewith
101.LAB	XBRL Taxonomy Extension Label Linkbase Document	Filed herewith
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document	Filed herewith
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document	Filed herewith
104	Cover Page Interactive Data File (embedded within the Inline XBRL document contained in Exhibit 101)	Filed herewith
*Certain schedules and exhibits have been omitted pursuance to Item 601(a)(5) of Regulation S-K because such schedules and exhibits do not contain information which is material to an investment decision, or which is not otherwise disclosed in the filed agreements. The Company will furnish the omitted schedules and exhibits to the SEC upon request by the SEC.
# Management contract or compensatory plan or arrangement.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Dated: May 2, 2024	By:	/s/ Fernando Castro-Caratini
		Executive Vice President, Chief Financial Officer, Treasurer and Secretary (Principal Financial Officer and Principal Accounting Officer)

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EX-22.1

List of Issuers of Guaranteed Securities

As of May 02, 2024, the debt instruments indicated below are fully and unconditionally guaranteed by Sun Communities, Inc.

Debt Instrument	Issuer	Jurisdiction of Organization
2.3% Senior Notes due 2028	Sun Communities Operating Limited Partnership	Michigan
5.5% Senior Notes due 2029	Sun Communities Operating Limited Partnership	Michigan
2.7% Senior Notes due 2031	Sun Communities Operating Limited Partnership	Michigan
4.2% Senior Notes due 2032	Sun Communities Operating Limited Partnership	Michigan
5.7% Senior Notes due 2033	Sun Communities Operating Limited Partnership	Michigan

EX-31.1

Exhibit 31.1

CERTIFICATIONS

(As Adopted Under Section 302 of the Sarbanes-Oxley Act of 2002)

I, Gary A. Shiffman, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Sun Communities, Inc.

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)    Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5.    The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of registrant's board of directors (or persons performing the equivalent function):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Dated: May 2, 2024	/s/ Gary A. Shiffman
	Gary A. Shiffman, Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

(As Adopted Under Section 302 of the Sarbanes-Oxley Act of 2002)

I, Fernando Castro-Caratini, certify that:

1.    I have reviewed this Quarterly Report on Form 10-Q of Sun Communities, Inc.

2.    Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.    Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.    The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)    Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)    Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)    Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)    Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

5.    The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent function):

a)    All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)    Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Dated: May 2, 2024	/s/ Fernando Castro-Caratini
	Fernando Castro-Caratini, Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350

(Adopted Under Section 906 of the Sarbanes-Oxley Act of 2002)

The undersigned officers, Gary A. Shiffman and Fernando Castro-Caratini, hereby certify that to the best of their knowledge: (a) this Quarterly Report on Form 10-Q of Sun Communities, Inc., for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and (b) the information contained in this Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Signature	Date
/s/ Gary A. Shiffman	May 2, 2024
Gary A. Shiffman, Chief Executive Officer
/s/ Fernando Castro-Caratini	May 2, 2024
Fernando Castro-Caratini, Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to Sun Communities, Inc. and will be retained by Sun Communities, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.

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Cover Page - shares	3 Months Ended
	Mar. 31, 2024	Apr. 25, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	1-12616
Entity Registrant Name	SUN COMMUNITIES, INC
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	38-2730780
Entity Address, Address Line One	27777 Franklin Rd,
Entity Address, Address Line Two	Suite 300,
Entity Address, City or Town	Southfield,
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48034
City Area Code	248
Local Phone Number	208-2500
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	SUI
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		124,634,174
Amendment Flag	false
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q1
Entity Central Index Key	0000912593
Current Fiscal Year End Date	--12-31

XML

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Assets
Land	$ 4,551.7	$ 4,278.2
Land improvements and buildings	11,529.5	11,682.2
Rental homes and improvements	755.9	744.4
Furniture, fixtures and equipment	1,031.3	1,011.7
Investment property	17,868.4	17,716.5
Accumulated depreciation	(3,410.5)	(3,272.9)
Investment property, net	14,457.9	14,443.6
Cash, cash equivalents and restricted cash	132.5	42.7
Inventory of manufactured homes	191.0	205.6
Notes and other receivables, net	469.1	421.6
Collateralized receivables, net	56.5	56.2
Goodwill	731.4	733.0
Other intangible assets, net	361.7	369.5
Other assets, net	713.2	668.5
Total Assets	17,113.3	16,940.7
Liabilities
Mortgage loans payable (see Note 9; Note 8 at VIEs)	3,465.5	3,478.9
Secured borrowings on collateralized receivables (See Note 5)	56.1	55.8
Unsecured debt	4,350.4	4,242.6
Distributions payable	119.7	118.2
Advanced reservation deposits and rent	480.4	344.5
Accrued expenses and accounts payable	370.4	313.7
Other liabilities	987.5	953.1
Total Liabilities	9,830.0	9,506.8
Commitments and contingencies
Temporary equity	259.7	260.9
Shareholders' Equity
Common stock, $0.01 par value. Authorized: 360.0 shares; Issued and outstanding: 124.6 at March 31, 2024 and 124.4 at December 31, 2023	1.2	1.2
Additional paid-in capital	9,471.4	9,466.9
Accumulated other comprehensive income	6.7	12.2
Distributions in excess of accumulated earnings	(2,540.6)	(2,397.5)
Total SUI shareholders' equity	6,938.7	7,082.8
Noncontrolling interests
Common and preferred OP units	84.9	90.2
Total noncontrolling interests	84.9	90.2
Total Shareholders' Equity	7,023.6	7,173.0
Total Liabilities, Temporary Equity and Shareholders' Equity	$ 17,113.3	$ 16,940.7

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Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock authorized (in shares)	360,000,000.0	360,000,000.0
Common stock issued (in shares)	124,641,861	124,400,000
Common stock outstanding (in shares)	124,641,861	124,400,000

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Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Fixed lease income	$ 476.9	$ 441.6
Home sales	68.9	86.3
Service, retail, dining and entertainment	117.9	102.4
Interest	4.6	11.4
Brokerage commissions and other, net	3.0	9.5
Total Revenues	671.3	651.2
Expenses
Property operating and maintenance	159.7	157.2
Real estate tax	31.3	30.1
Home costs and selling	51.9	62.6
Service, retail, dining and entertainment	115.9	99.8
General and administrative	78.5	64.1
Catastrophic event-related charges, net	7.2	1.0
Business combinations	0.0	2.8
Depreciation and amortization	165.3	155.6
Asset impairments	20.7	2.4
Goodwill impairment (see Note 6)	0.0	15.4
Loss on extinguishment of debt	0.6	0.0
Interest	89.7	76.6
Interest on mandatorily redeemable preferred OP units / equity	0.0	1.0
Total Expenses	720.8	668.6
Loss Before Other Items	(49.5)	(17.4)
Loss on remeasurement of marketable securities (see Note 16)	0.0	(19.9)
Gain / (loss) on foreign currency exchanges	1.1	(2.7)
Gain / (loss) on dispositions of properties	5.4	(1.6)
Other income / (expense), net	8.0	(1.0)
Gain / (loss) on dispositions of properties	(0.7)	(1.7)
Total Income / (Loss) from Nonconsolidated Affiliates	1.4	(0.2)
Gain / (loss) on remeasurement of investment in nonconsolidated affiliates	5.2	(4.5)
Current tax expense (see Note 13)	2.1	3.9
Deferred tax benefit	5.7	4.6
Net Loss	(25.5)	(48.3)
Less: Preferred stock distribution	3.2	2.4
Less: Loss attributable to noncontrolling interests	(1.3)	(5.8)
Net loss attributable to SUI common shareholders	$ (27.4)	$ (44.9)
Weighted average common shares outstanding:
Weighted average common shares outstanding - basic (in shares)	123.6	123.3
Diluted weighted average common shares outstanding - diluted (in shares)	126.6	126.2
Earnings per share:
Basic earning per share (in dollars per share)	$ (0.22)	$ (0.36)
Diluted earning per share (in dollars per share)	$ (0.22)	$ (0.36)

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Consolidated Statements Of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Loss	$ (25.5)	$ (48.3)
Foreign Currency Translation
Foreign currency translation gain / (loss) arising during period	(9.2)	16.9
Adjustment for accumulated foreign currency translation loss reclassified into earnings	0.0	11.9
Net foreign currency translation gain / (loss)	(9.2)	28.8
Cash Flow Hedges
Change in unrealized gain / (loss) on interest rate derivatives	8.8	(8.6)
Less: Interest rate derivative gain reclassified to earnings	(4.9)	(2.3)
Net unrealized gain / (loss) on interest rate derivatives	3.9	(10.9)
Total Comprehensive Loss	(30.8)	(30.4)
Less: Comprehensive loss attributable to noncontrolling interests	1.1	5.2
Comprehensive Loss attributable to SUI	$ (29.7)	$ (25.2)

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Consolidated Statement Of Shareholders' Equity - USD ($) $ in Millions	Total	Series K preferred OP units	Total Equity	Total Equity Series K preferred OP units	Common Stock	Additional Paid-in Capital	Distributions in Excess of Accumulated Earnings	Accumulated Other Comprehensive Income / (Loss)	Noncontrolling Interests
Beginning balance at Dec. 31, 2022	$ 202.9
Temporary Equity
Issuance of third party equity interests in consolidated entities	1.7
Issuance of Series E preferred OP units		$ 100.0		$ 100.0
Net loss	(4.6)
Distributions	1.5
Accumulated Distributions In Excess Of Net Income, Adjustment For Accretion Of Temporary Equity	(0.3)		$ 0.0				$ (0.3)
OP Units accretion	0.3
Ending balance at Mar. 31, 2023	298.8
Beginning balance (in shares) at Dec. 31, 2022					124,000,000.0
Beginning Balance at Dec. 31, 2022	7,888.5		8,091.4		$ 1.2	$ 9,549.7	(1,731.2)	$ (9.9)	$ 78.7
Shareholders' Equity
Issuance of stock and units (in shares)					400,000
Issuance of stock and units	4.4		4.4			0.0			4.4
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards (in shares)					(100,000)
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards	(11.0)		(11.0)			(11.0)
Conversion of OP units (in shares)					100,000
Conversion of OP units	7.3		7.3			7.3			0.0
Issuance of third party equity interests in consolidated entities	0.0		1.7						0.0
Share-based compensation - amortization and forfeitures	10.4		10.4			10.4
Other comprehensive income / (loss)	17.9		17.9					17.3	0.6
Net loss	(43.7)		(48.3)				(42.5)		(1.2)
Distributions	(118.9)		(120.4)				(115.8)		(3.1)
Ending balance (in shares) at Mar. 31, 2023					124,400,000
Ending Balance at Mar. 31, 2023	7,754.6		8,053.4		$ 1.2	9,556.4	(1,889.8)	7.4	79.4
Beginning balance at Dec. 31, 2022	202.9
Ending balance at Dec. 31, 2023	260.9	96.7
Beginning balance (in shares) at Dec. 31, 2022					124,000,000.0
Beginning Balance at Dec. 31, 2022	7,888.5		8,091.4		$ 1.2	9,549.7	(1,731.2)	(9.9)	78.7
Ending balance (in shares) at Dec. 31, 2023					124,400,000
Ending Balance at Dec. 31, 2023	7,173.0		7,433.9		$ 1.2	9,466.9	(2,397.5)	12.2	90.2
Temporary Equity
Conversion of OP units	(0.5)
Issuance of Series E preferred OP units		0.0
Net loss	(0.3)
Distributions	2.3
Accumulated Distributions In Excess Of Net Income, Adjustment For Accretion Of Temporary Equity	(1.9)		0.0				(1.9)
OP Units accretion	1.9
Ending balance at Mar. 31, 2024	259.7	$ 95.7
Shareholders' Equity
Issuance of stock and units (in shares)					300,000
Issuance of stock and units	0.3		0.3			(0.3)			0.6
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards (in shares)					(200,000)
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards	(7.6)		(7.6)			(7.6)
Conversion of OP units (in shares)					100,000
Conversion of OP units	0.5		0.0			2.1			(1.6)
Share-based compensation - amortization and forfeitures	10.4		10.4			10.3	0.1
Other comprehensive income / (loss)	(5.3)		(5.3)					(5.5)	0.2
Net loss	(25.2)		(25.5)				(24.2)		(1.0)
Distributions	$ (120.6)		(122.9)				(117.1)		(3.5)
Ending balance (in shares) at Mar. 31, 2024	3,321,482				124,600,000
Ending Balance at Mar. 31, 2024	$ 7,023.6		$ 7,283.3		$ 1.2	$ 9,471.4	$ (2,540.6)	$ 6.7	$ 84.9

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Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities
Net Cash Provided By Operating Activities	$ 242.5	$ 194.5
Investing Activities
Investment in properties	160.6	301.8
Acquisitions, net of cash acquired	(29.9)	(47.9)
Proceeds from deposit on acquisition	0.9	1.4
Proceeds from insurance	2.3	4.9
Proceeds from disposition of assets and depreciated homes, net	2.0	15.5
Proceeds related to disposition of properties	51.7	0.2
Issuance of notes and other receivables	(2.0)	(6.2)
Repayments of notes and other receivables	7.2	3.3
Investments in nonconsolidated affiliates	(4.3)	(2.7)
Distributions of capital from nonconsolidated affiliates	5.6	11.4
Net Cash Used For Investing Activities	(127.1)	(321.9)
Financing Activities
Issuance and costs of common stock, OP units and preferred OP units, net	(0.3)	0.0
Common stock withheld to satisfy income tax obligations related to vesting of restricted stock awards	(7.6)	(11.0)
Borrowings on lines of credit	1,260.5	626.0
Payments on lines of credit	(1,637.8)	(951.1)
Proceeds from issuance of other debt	499.4	583.0
Contributions from noncontrolling interest	0.0	1.7
Payments on other debt	(14.2)	(19.8)
Distributions	(121.4)	(113.6)
Payments for deferred financing costs, net of prepaid return	(4.0)	(3.6)
Net Cash Provided By / (Used For) Financing Activities	(25.4)	111.6
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(0.2)	0.2
Net change in cash, cash equivalents and restricted cash	89.8	(15.6)
Cash, cash equivalents and restricted cash, beginning of period	42.7	90.4
Cash, Cash Equivalents and Restricted Cash, End of Period	132.5	74.8
Supplemental Information
Cash paid for interest, net	87.4	72.2
Cash paid for interest on mandatorily redeemable debt	0.0	1.0
Cash paid for income taxes	0.6	10.0
Noncash investing and financing activities
Reduction in secured borrowing balance	1.2	0.0
Change in distributions declared and outstanding	1.5	6.9
Conversion of common and preferred OP units	2.1	7.3
Assets held for sale, net (included within Other Assets, net and Other Liabilities)	0.0	262.1
ROU asset obtained from new operating lease liabilities	3.2	0.2
Issuance of notes and other receivables in relation to disposition of properties	0.0	111.2
Noncash investing and financing activities at the date of acquisition
Acquisitions - Common stock and OP units issued	0.6	4.5
Series K preferred OP units
Noncash investing and financing activities at the date of acquisition
Common OP units issued for acquisition of noncontrolling interests	$ 0.0	$ 100.0

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Consolidated Statements Of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Cash Flows [Abstract]
Capitalized interest	$ 2.7	$ 2.5

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Basis of Presentation

3 Months Ended

Mar. 31, 2024

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

1. Basis of Presentation

Sun Communities, Inc., and all wholly-owned or majority-owned and controlled subsidiaries, including Sun Communities Operating Limited Partnership (the "Operating Partnership"), Sun Home Services, Inc. ("SHS"), Safe Harbor Marinas, LLC ("Safe Harbor") and the entities through which we operate our business in the United Kingdom (collectively, "Park Holidays") are referred to herein as the "Company," "SUI," "us," "we," or "our."

We follow accounting standards set by the Financial Accounting Standards Board ("FASB"). FASB establishes accounting principles generally accepted in the United States of America ("GAAP"), which we follow to ensure that we consistently report our financial condition, results of operations and cash flows. References to GAAP issued by the FASB in these footnotes are to the FASB Accounting Standards Codification ("ASC"). These unaudited Consolidated Financial Statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for interim financial information and in accordance with GAAP. We present interim disclosures and certain information and footnote disclosures as required by SEC rules and regulations. Accordingly, the unaudited Consolidated Financial Statements do not include all of the information and footnotes required by GAAP for complete financial statements. The accompanying unaudited Consolidated Financial Statements reflect, in the opinion of management, all adjustments, including adjustments of a normal and recurring nature, necessary for a fair presentation of the interim financial statements. All significant intercompany transactions have been eliminated in consolidation. Certain reclassifications have been made to prior period financial statements in order to conform to current period presentation. There was no impact to prior period net income for any of the reclassifications.

The results of operations for interim periods are not necessarily indicative of results that may be expected for any other interim period or for the full year. These unaudited Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2023 as filed with the SEC on February 28, 2024 (our "2023 Annual Report"). These statements have been prepared on a basis that is substantially consistent with the accounting principles applied in our 2023 Annual Report.

Significant Accounting Policies: Investment Property

Investment property is recorded at cost, less accumulated depreciation.

Impairment of long-lived assets - we review the carrying value of long-lived assets to be held for use for impairment quarterly or whenever events or changes in circumstances indicate a possible impairment. Future events could occur which would cause us to conclude that impairment indicators exist, and significant adverse changes in national, regional, or local market conditions or trends may cause us to change the estimates and assumptions used in our impairment analysis. The results of an impairment analysis could be material to our financial statements. Our primary indicator for potential impairment is based on NOI trends period over period. Circumstances that may prompt a test of recoverability may include a significant decrease in the anticipated market price, an adverse change to the extent or manner in which an asset may be used or in its physical condition or other events that may significantly change the value of the long-lived asset. An impairment loss is recognized when a long-lived asset's carrying value is not recoverable and exceeds estimated fair value.

We estimate the fair value of our long-lived assets based on discounted future cash flows and any potential disposition proceeds for a given asset. Forecasting cash flows requires management to make estimates and assumptions about such variables as the estimated holding period, rental rates, occupancy, development and operating expenses during the holding period, as well as capitalization rates. Management uses its best judgment when developing these estimates and assumptions.

Reportable Segments

During the three months ended March 31, 2024, we expanded our organizational structure from three segments, which consisted of (i) manufactured home ("MH") communities, (ii) recreational vehicle ("RV") communities, and (iii) Marinas, to a four-segment structure that now includes (iv) communities in the United Kingdom ("UK"). The new structure reflects how the chief operating decision maker manages the business, makes operating decisions, allocates resources and evaluates operating performance. Beginning with the three months ended March 31, 2024, we are reporting our financial results consistent with our newly realigned operating segments and have recast prior period amounts to conform to the way we internally manage our business and monitor segment performance. Certain reclassifications have been made to the prior period financial statements and related notes in order to conform to the current period presentation. There was no impact to prior period net income, stockholders' equity or cash flows for any of the reclassifications.

Restatement of Previously Issued Financial Statements

As disclosed in our 2023 Annual Report, we restated the unaudited financial information as of and for the three months ended March 31, 2023, the three and six months ended June 30, 2023, and the three and nine months ended September 30, 2023 (collectively, the "2023 Interim Financial Statements"). Accordingly, certain prior period balances within our consolidated financial statements and the accompanying footnotes have been restated, where applicable.

In 2022, we acquired a portfolio of holiday park properties located in the United Kingdom, which we refer to as our Park Holidays business, classified within our UK reporting segment. As disclosed in our Current Report on Form 8-K filed with the SEC on February 20, 2024, during the course of management's 2023 year-end procedures, we reviewed the controls relating to the valuation of the Park Holidays business and the associated goodwill at March 31, 2023, June 30, 2023 and September 30, 2023. In connection with that review, we concluded that there were triggering events relevant to the valuation of the Park Holidays business, including reduced financial projections and increases in interest rates, that should have been taken into account when preparing the 2023 Interim Financial Statements. Management undertook a full review of the valuations and determined that at each of March 31, 2023, June 30, 2023 and September 30, 2023, we should have recognized non-cash impairments to goodwill for the Park Holidays business.

For the three months ended March 31, 2023, non-cash goodwill impairment increased Net loss on our Consolidated Statements of Operations by $15.4 million.

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Revenue

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Revenue

2. Revenue

Our revenue consists of real property revenue at our MH, RV, Marina and UK properties, revenue from home sales, revenue from service, retail, dining and entertainment, interest income, and brokerage commissions and other revenue.

The following table disaggregates our revenue by major source and segment (in millions):

	Three Months Ended
	March 31, 2024										March 31, 2023(1)
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Revenues
Real property	$	238.0	$	104.5	$	96.4	$	38.0	$	476.9	$	224.0	$	99.6	$	89.1	$	28.9	$	441.6
Home sales	27.3		5.5		—		36.1		68.9		40.8		6.4		—		39.1		86.3
Service, retail, dining and entertainment	2.6		6.5		104.5		4.3		117.9		2.6		5.8		91.1		2.9		102.4
Interest	3.1		1.4		0.1		—		4.6		10.3		0.9		0.2		—		11.4
Brokerage commissions and other, net	1.0		0.7		1.0		0.3		3.0		3.8		4.7		0.9		0.1		9.5
Total Revenues	$	272.0	$	118.6	$	202.0	$	78.7	$	671.3	$	281.5	$	117.4	$	181.3	$	71.0	$	651.2

(1) Recast to reflect segment changes.

The majority of our revenue is derived from site and home leases, and wet slip and dry storage space leases that are accounted for pursuant to ASC 842, "Leases." We account for all revenue from contracts with customers following ASC 606, "Revenue from Contracts with Customers," except for those that are within the scope of other topics in the FASB ASC. For additional information, refer to Note 1, "Significant Accounting Policies" in our 2023 Annual Report.

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Real Estate Acquisitions and Dispositions

3 Months Ended

Mar. 31, 2024

Business Combinations [Abstract]

Real Estate Acquisitions and Dispositions

3. Real Estate Acquisitions and Dispositions

2024 Acquisitions

We did not acquire any operating properties during the three months ended March 31, 2024. During the same period, we entered into a ground lease to support one marina with eight wet slips and dry storage spaces.

2024 Development and Expansion Activities

During the three months ended March 31, 2024, we acquired two land parcels located in the United States ("U.S.") for an aggregate purchase price of $12.9 million. In conjunction with one of the land parcel acquisitions, we issued 4,452 common OP units valued at $0.6 million.

During the three months ended March 31, 2024, we acquired two buildings related to our marinas located in the U.S. for an aggregate purchase price of $13.7 million.

2024 Dispositions

In February 2024, we sold two MH communities located in Arizona and Florida with 533 developed sites for total cash consideration of $51.7 million. The gain from the sale of the properties was $6.2 million and was recorded in Gain / (loss) on dispositions of properties on our Consolidated Statements of Operations.

2023 Acquisitions

For the year ended December 31, 2023, we acquired the following properties:

Property Name(1)	Type	Sites, Wet Slips and Dry Storage Spaces	Development Sites	State, Province or Country	Month Acquired
Fox Run	MH: asset acquisition	68	72	MI	January
Savannah Yacht Center	Marina: asset acquisition	24	—	GA	March
	Total	92	72

(1) Property names are subject to changes subsequent to acquisition.

The following table summarizes the amounts of assets acquired, net of liabilities assumed at the acquisition date and the consideration paid for the acquisitions completed in 2023 (in millions):

	At Acquisition Date										Consideration
	Investment in property		Inventory of manufactured homes, boat parts and retail related items		In-place leases, goodwill and other intangible assets		Other assets / (liabilities), net		Total identifiable assets acquired net of liabilities assumed		Cash and escrow		Temporary and permanent equity(1)		Total consideration
Asset Acquisition(2)
Fox Run(3)	$	7.2	$	—	$	—	$	—	$	7.2	$	2.8	$	4.4	$	7.2
Savannah Yacht Center(4)	100.2		0.1		0.4		4.2		104.9		4.3		100.6		104.9
Total	$	107.4	$	0.1	$	0.4	$	4.2	$	112.1	$	7.1	$	105.0	$	112.1

(1) Refer to Note 10, "Equity and Temporary Equity," for additional detail.

(2) Property names are subject to changes subsequent to acquisition.

(3) In conjunction with the acquisition, the Operating Partnership issued 31,289 common OP units valued at $4.4 million.

(4) In conjunction with the acquisition, the Operating Partnership issued one million Series K preferred OP units valued at $100.6 million.

During the year ended December 31, 2023, we incurred and capitalized $3.1 million of transaction costs, which have been allocated among the various fixed asset categories for purchases that meet the asset acquisition criteria. During the year ended December 31, 2023, we recognized $3.0 million of business combination expenses in connection with transactions completed during 2022.

2023 Development and Expansion Activities

During the year ended December 31, 2023, we acquired four land parcels located in the U.S. and one land parcel in the United Kingdom for an aggregate purchase price of $35.8 million.

2023 Dispositions

In December 2023, as part of a transaction with our joint venture partners in Sun NG RV Resorts, Sun NG Whitewater RV Resorts LLC, Sun NG Beaver Brook LLC and four standalone affiliates (collectively, "Sun NG"), we disposed of our majority equity interest owned in three consolidated joint venture RV properties with 955 developed sites.

In August 2023, we sold one MH community located in Maine with 155 developed sites at its net carrying value for cash consideration of $6.8 million. The property was previously classified as held for sale during the three months ended June 30, 2023, with its net carrying value of $13.1 million written down by $6.3 million within Asset impairments on our Consolidated Statements of Operations, to a fair value less cost to sell of $6.8 million.

In February 2023, we sold two parcels of land in the United Kingdom for total consideration of $111.5 million. The consideration consisted of $108.8 million in the form of an operator note receivable that was added to an existing facility with a weighted average interest rate of 11.9% per annum, due May 31, 2023 and subsequently extended to July 31, 2023 as part of the operator's total facility. On the date of sale, the carrying value of the note receivable approximated its fair value due to its short term nature. The dispositions resulted in a loss on sale totaling $2.2 million during the year ended December 31, 2023, net of the release of foreign currency translation losses from Accumulated other comprehensive income ("AOCI") of $11.9 million. The total loss on sale was recorded in Gain / (loss) on dispositions of properties on the Consolidated Statements of Operations. As of December 31, 2023, we have reacquired these two parcels of land at fair value as part of the settlement of the related note receivable, with no remeasurement gain or loss recognized. Refer to Note 4, "Notes and Other Receivables," for additional information on the settlement of the notes receivable.

Real Estate Held For Sale - Changes to a Plan of Sale

We periodically classify real estate as "held for sale" after an active program to sell an asset has commenced and when the sale is probable. Subsequent to the classification of assets as held for sale, no further depreciation expense is recorded.

In February 2023, the criteria was met to classify Sandy Bay, an operating MH community in the United Kingdom, with 730 developed sites, as held for sale. Previously, this property had been under contract. At December 31, 2023, the sale contract was no longer in effect, and due to an unexpected change in circumstance related to the counterparty, we reclassified the property as held for use. In accordance with ASC Topic 360, "Property, Plant, and Equipment," we recorded the property at the lower of the carrying amount before the asset was held for sale, adjusted for depreciation and amortization expense that would have been recognized had the asset been continually classified as held for use, and the fair value at the time of the reclassification. During the three months ended December 31, 2023, we recorded depreciation and amortization expense of $1.3 million in conjunction with the reclassification of the property. The following assets and liabilities, which were previously classified as held for sale within Other assets and Other liabilities, respectively, were reclassified as of December 31, 2023: Investment in property, net of $259.0 million, Inventory of manufactured homes of $4.6 million, Other intangible assets of $1.3 million and Other liabilities, net of $55.8 million.

Refer to Note 20, "Subsequent Events," for information regarding acquisitions completed after March 31, 2024.

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Notes And Other Receivables

3 Months Ended

Mar. 31, 2024

Notes and Loans Payable, by Type, Current and Noncurrent [Abstract]

Notes And Other Receivables

4. Notes and Other Receivables

The following table sets forth certain information regarding notes and other receivables (in millions):

	March 31, 2024		December 31, 2023
Installment notes receivable on manufactured homes, net	$	38.3	$	19.6
Notes receivable from real estate developers and operators	127.7		134.5
Other receivables, net	303.1		267.5
Total Notes and Other Receivables, net	$	469.1	$	421.6

Installment Notes Receivable on Manufactured Homes

Installment notes receivable are measured at fair value, using indicative pricing models from third party valuation specialists, in accordance with ASC Topic 820, "Fair Value Measurements and Disclosures." During the three months ended December 31, 2023, we transferred a group of installment notes receivable to an unrelated party. Refer to Note 5, "Collateralized Receivables and Transfers of Financial Assets," for additional details. The balances of installment notes receivable of $38.3 million (gross installment notes receivable of $39.1 million less fair value adjustment of $0.8 million) and $19.6 million (gross installment notes receivable of $20.4 million less fair value adjustment of $0.8 million) as of March 31, 2024 and December 31, 2023, respectively, are secured by manufactured homes. The notes represent financing to purchasers of manufactured homes located in our communities and require monthly principal and interest payments. The notes had a net weighted average interest rate (net of servicing costs) and maturity of 6.6% and 18.2 years as of March 31, 2024, and 6.9% and 17.2 years as of December 31, 2023, respectively. Refer to Note 16, "Fair Value Measurements," for additional details.

Notes Receivable from Real Estate Developers and Operators

Notes receivable from real estate developers and operators are measured at fair value, using indicative pricing models from third party valuation specialists, in accordance with ASC Topic 820, "Fair Value Measurements and Disclosures." Refer to Note 16, "Fair Value Measurements," for additional information.

Note Receivable from a Real Estate Operator

The note receivable from a real estate operator was comprised of a fully drawn loan provided to Royale Holdings Group HoldCo Limited, a real estate development owner and operator in the United Kingdom, and certain other parties, to fund investing and financing activities (the "Note"). The Note was collateralized by a first-priority security interest in three real estate assets and three MH manufacturers in the United Kingdom. As of March 31, 2024, there was no remaining balance due on the note receivable.

After the maturity date of July 31, 2023, the Note became past due. On September 29, 2023, we appointed receivers over the real estate assets. The receivers marketed the real estate assets for sale during the fourth quarter of 2023. Upon completion of the marketing process, on December 28, 2023, we appointed administrators over the real estate assets and acquired such assets through a credit bid. During the fourth quarter, we engaged third party valuation specialists to appraise the real estate assets in accordance with ASC 820. The appraisals were completed using the discounted cash flow method (income approach), with the significant assumptions being development density, estimated absorption rate, home sale price and discount rate. The real estate assets appraised at fair value totaling $263.8 million. The Note balance was reduced by this amount, with an offsetting adjustment to Investment property, net on our Consolidated Balance Sheets as of December 31, 2023.

As of December 31, 2023, the balance remaining on the Note, which was in nonaccrual status, collateralized by a first-priority security interest in three MH manufacturers in the United Kingdom, was adjusted to fair value totaling $10.8 million (gross notes receivable of $114.3 million, inclusive of accrued interest of $10.4 million, less a fair value adjustment of $103.5 million). The note had a weighted average interest rate of 12.5% as of December 31, 2023.

During the three months ended March 31, 2024, we completed a receivership process related to the three MH manufacturers in the United Kingdom. The receivers sold such assets for a total consideration of $10.7 million, resulting in cash proceeds to the Company of $7.0 million, net of non-cash consideration and fees. The sale of these assets resulted in an incremental fair value remeasurement adjustment of $0.8 million that was recorded in Loss on remeasurement of notes receivable on the Consolidated Statements of Operations.

Notes Receivable from Real Estate Developers

Other acquisition and construction loans provided to real estate developers total $127.7 million with a net weighted average interest rate and maturity of 9.3% and 2.6 years as of March 31, 2024, and total $123.7 million with a net weighted average interest rate and maturity of 9.2% and 2.6 years as of December 31, 2023. As of March 31, 2024, the additional acquisition and construction loans provided to real estate developers have $38.3 million of undrawn funds. There were no adjustments to the fair value of notes receivable from real estate developers during the three months ended March 31, 2024 and the year ended December 31, 2023.

Other Receivables, net

Other receivables, net were comprised of amounts due from the following categories (in millions):

	March 31, 2024		December 31, 2023
MH and annual RV residents for rent, utility charges, fees and other pass-through charges, net(1)	$	83.2	$	65.9
Insurance receivables	65.2		77.8
Home sale proceeds	54.8		28.2
Marina customers for storage, service and lease payments, net(2)	52.8		46.8
Other receivables	47.1		48.8
Total Other Receivables, net	$	303.1	$	267.5

(1)Net of allowance of $5.0 million and $4.8 million as of March 31, 2024 and December 31, 2023, respectively.

(2)Net of allowance of $3.1 million and $2.9 million as of March 31, 2024 and December 31, 2023, respectively.

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Collateralized Receivables and Transfers of Financial Assets

3 Months Ended

Mar. 31, 2024

Transfers and Servicing [Abstract]

Transfers Of Financial Assets

5. Collateralized Receivables and Transfers of Financial Assets

During the three months ended December 31, 2023, we completed a transfer of our installment notes receivable to an unrelated entity and received net cash proceeds of $53.4 million, along with an agreed upon future cash payment of $1.1 million from the third-party servicer, in exchange for relinquishing our right, title and interest in the receivables. We used the proceeds to pay down borrowings outstanding under our senior credit facility. We have no further obligations or rights with respect to the control, management, administration, servicing or collection of the installment notes receivables. However, we are subject to certain recourse provisions requiring us to purchase the underlying manufactured homes collateralizing such notes at a price calculated based on the agreed upon terms, in the event of a note default and subsequent repossession of the home by the unrelated entity. The recourse provisions are considered to be a form of continuing involvement which precluded establishing legal isolation, and therefore these transferred loans do not meet the requirements for sale accounting under ASC 860, "Transfers and Servicing."

The transaction has been accounted for in accordance with ASC 860-30, with the transferred assets classified as Collateralized receivables, net and the cash proceeds received from this transaction classified as Secured borrowings on collateralized receivables within the Consolidated Balance Sheets. We have elected to apply the fair value option to the collateralized receivables and related secured borrowings under ASC 820, "Fair Value Measurements and Disclosures." The balance of collateralized receivables was $56.5 million (gross collateralized receivable of $57.8 million less fair value adjustments of $1.3 million) and $56.2 million (gross collateralized receivable of $59.1 million less fair value adjustments of $2.9 million) as of March 31, 2024 and December 31, 2023, respectively. The balance of secured borrowings on collateralized receivables was $56.1 million (gross secured borrowings of $52.6 million plus fair value adjustments of $3.5 million) and $55.8 million (gross secured borrowings of $53.9 million plus fair value adjustments of $1.9 million) as of March 31, 2024, and December 31, 2023, respectively. The notes represent financing to purchasers of manufactured homes located in our communities and require monthly principal and interest payments. The notes had a net weighted average interest rate and maturity of 8.6% and 13.9 years as of March 31, 2024 and 8.6% and 14.2 years as of December 31, 2023. Refer to Note 16, "Fair Value Measurements," for additional details.

The collateralized receivables earn interest income and the secured borrowings accrue interest expense at the same amount. The amount of interest income and interest expense recognized during the three months ended March 31, 2024 was $1.2 million.

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Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure

6. Goodwill and Other Intangible Assets

Our intangible assets include goodwill, in-place leases, non-competition agreements, trademarks and trade names, customer relationships, franchise agreements and other intangible assets. These intangible assets are recorded in Goodwill and Other intangible assets, net on the Consolidated Balance Sheets.

Goodwill

The measurement periods for the valuation of assets acquired and liabilities assumed in a business combination end as soon as information on the facts and circumstances that existed as of the acquisition dates becomes available on the earlier of (i) the dates of acquisition, or (ii) 12 months after the acquisition dates. Adjustments in purchase price allocations may require a change in the amounts allocated to goodwill during the periods in which the adjustments are determined. Changes in the carrying amount of goodwill during the three months ended March 31, 2024 by reportable segment were as follows (in millions):

	MH		RV		Marina		UK		Total
Balance as of December 31, 2023(1)	$	—	$	9.5	$	541.5	$	182.0	$	733.0
Currency Translation Adjustment	—		—		—		(1.6)		(1.6)
Balance as of March 31, 2024	$	—	$	9.5	$	541.5	$	180.4	$	731.4
Accumulated impairment losses as of March 31, 2024(2)	$	—	$	—	$	—	$	369.9	$	369.9

(1) Recast to reflect segment changes.

(2) During the three months ended March 31, 2024, we performed a qualitative assessment of our goodwill balance in accordance with ASC 350-20, "Goodwill and Other." We concluded that the fair value of each respective reporting segment was more-likely-than-not greater than its carrying value. Accordingly, there were no goodwill impairment charges recorded during the three months ended March 31, 2024. For the year ended December 31, 2023, we recorded aggregate non-cash impairment charges of $369.9 million within Goodwill impairment on the Consolidated Statements of Operations. The decline in fair value of the UK reporting segment was primarily driven by a higher weighted average cost of capital due to changes in the macroeconomic environment, as well as inflationary pressures in the UK causing a decline in financial projections.

We evaluate goodwill for impairment on an annual basis and at an interim date, if indicators of potential impairment exist. During the three months ended March 31, 2024, we voluntarily changed our annual impairment assessment date from April 1 to October 31 for the UK reporting segment. As the last quantitative impairment test was performed as of December 31, 2023, there will not be more than 12 months that have elapsed between goodwill impairment tests of the UK reporting segment.

The change in measurement date represents a change in method of applying an accounting principle. This change is preferable because it better aligns our goodwill impairment testing procedures with our annual planning process, our fiscal year-end, and with the annual testing for our Marina segment. We continue to monitor each reporting segment for triggering events for purposes of goodwill impairment testing.

The change in accounting principle did not result in any, nor do we expect the change in accounting principle to result in any delay, acceleration or avoidance of an impairment charge.

Other Intangible Assets, net

The gross carrying amounts and accumulated amortization of our intangible assets were as follows (in millions):

		March 31, 2024				December 31, 2023
Other Intangible Asset	Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
In-place leases	2 months - 13 years	$	166.1	$	(147.5)	$	166.0	$	(146.2)
Non-competition agreements	5 years	10.5		(6.7)		10.5		(6.2)
Trademarks and trade names	3 - 15 years	84.6		(13.7)		85.3		(12.3)
Customer relationships	4 - 17 years	131.6		(40.5)		131.6		(37.3)
Franchise agreements and other intangible assets	1 - 27 years	48.4		(15.1)		48.4		(14.3)
Total finite-lived assets		$	441.2	$	(223.5)	$	441.8	$	(216.3)
Indefinite-lived assets - Trademarks and trade names	N/A	141.0		—		141.0		—
Indefinite-lived assets - Other	N/A	3.0		—		3.0		—
Total indefinite-lived assets		$	144.0	$	—	$	144.0	$	—
Total		$	585.2	$	(223.5)	$	585.8	$	(216.3)

Amortization expenses related to our Other intangible assets were as follows (in millions):

	Three Months Ended
Other Intangible Asset Amortization Expense	March 31, 2024		March 31, 2023
In-place leases	$	1.9	$	3.6
Non-competition agreements	0.5		0.5
Trademarks and trade names	1.4		1.5
Customer relationships	3.2		3.2
Franchise fees and other intangible assets	0.7		0.9
Total	$	7.7	$	9.7

We anticipate amortization expense for Other intangible assets to be as follows for the next five years (in millions):

Other Intangible Asset Future Amortization Expense	Remainder 2024		2025		2026		2027		2028
In-place leases	$	5.1	$	6.1	$	3.9	$	2.3	$	0.9
Non-competition agreements	1.6		2.1		0.1		—		—
Trademarks and trade names	4.3		5.7		5.7		5.4		5.3
Customer relationships	9.5		12.7		12.3		12.2		12.1
Franchise agreements and other intangible assets	2.3		3.0		2.7		2.5		2.5
Total	$	22.8	$	29.6	$	24.7	$	22.4	$	20.8

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Investment in Nonconsolidated Affiliates

3 Months Ended

Mar. 31, 2024

Equity Method Investments and Joint Ventures [Abstract]

Investment in Nonconsolidated Affiliates

7. Investments in Nonconsolidated Affiliates

Investments in joint ventures that are not consolidated, nor recorded at cost, are accounted for using the equity method of accounting as prescribed in ASC Topic 323, "Investments - Equity Method and Joint Ventures." Investments in nonconsolidated affiliates are recorded within Other assets, net on the Consolidated Balance Sheets. Equity income and loss are recorded in Income / (loss) from nonconsolidated affiliates on the Consolidated Statements of Operations.

Sungenia Joint Venture ("Sungenia JV")

At March 31, 2024 and December 31, 2023, we had a 50.0% ownership interest in Sungenia JV, a joint venture formed between us and Ingenia Communities Group (ASX:INA) ("Ingenia") in November 2018, to establish and grow a manufactured housing community development program in Australia.

GTSC LLC ("GTSC")

At March 31, 2024 and December 31, 2023, we had a 40.0% ownership interest in GTSC, which engages in acquiring, holding and selling loans secured, directly or indirectly, by manufactured homes located in our communities.

SV Lift, LLC ("SV Lift")

At March 31, 2024 and December 31, 2023, we had a 50.0% ownership interest in SV Lift, which owns, operates and leases an aircraft.

The investment balance in each nonconsolidated affiliate was as follows (in millions):

Investment	March 31, 2024		December 31, 2023
Investment in Sungenia JV	$	60.6	$	56.8
Investment in GTSC	60.3		60.4
Investment in SV Lift	1.5		1.7
Total	$	122.4	$	118.9

The income / (loss) from each nonconsolidated affiliate is as follows (in millions):

	Three Months Ended
Income / (loss) from Nonconsolidated Affiliates	March 31, 2024		March 31, 2023
RezPlot Systems LLC equity loss(1)	$	—	$	(1.5)
Sungenia JV equity income	0.9		0.6
GTSC equity income	0.9		1.0
SV Lift equity loss	(0.4)		(0.3)
Total Income / (Loss) from Nonconsolidated Affiliates	$	1.4	$	(0.2)

(1) Represents an RV reservation software technology company, operating under the Campspot brand, which we acquired in January 2019 and disposed of our ownership interest in December 2023.

The change in the Sungenia JV investment balance is as follows (in millions):

	Three Months Ended		Year Ended
	March 31, 2024		December 31, 2023
Beginning balance	$	56.8	$	44.5
Cumulative translation adjustment	(1.0)		(0.5)
Contributions	3.9		9.6
Equity earnings	0.9		3.2
Ending Balance	$	60.6	$	56.8

The change in the GTSC investment balance is as follows (in millions):

	Three Months Ended		Year Ended
	March 31, 2024		December 31, 2023
Beginning balance	$	60.4	$	54.5
Contributions	0.2		27.5
Distributions	(6.4)		(20.7)
Equity earnings	0.9		3.3
Fair value adjustment	5.2		(4.2)
Ending Balance	$	60.3	$	60.4

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Consolidated Variable Interest Entities

3 Months Ended

Mar. 31, 2024

Disclosure of Variable Interest Entities [Abstract]

Consolidated Variable Interest Entities

8. Consolidated Variable Interest Entities

The Operating Partnership

We consolidate the Operating Partnership under the guidance set forth in ASC 810, "Consolidation." We evaluated whether the Operating Partnership met the criteria for classification as a variable interest entity ("VIE") or, alternatively, as a voting interest entity and concluded that the Operating Partnership met the criteria of a VIE. Our significant asset is our investment in the Operating Partnership, and consequently, substantially all of our assets and liabilities represent those assets and liabilities of the Operating Partnership. We are the sole general partner and generally have the power to manage and have complete control over the Operating Partnership and the obligation to absorb its losses or the right to receive its benefits.

Other Consolidated VIEs

We consolidate Sun NG Cisco Grove RV LLC, Sun NG Coyote Ranch RV LLC, Sun NG Kittatinny RV LLC, Sun NG River Beach LLC, Sun NG Beaver Brook LLC, FPG Sun Menifee 80 LLC, Solar Energy Project LLC, Solar Energy Project CA II LLC, Solar Energy Project III LLC and FPG Sun Moreno Valley 66 LLC under the guidance set forth in ASC 810, "Consolidation." We concluded that each entity is a VIE where we are the primary beneficiary, as we have the power to direct the significant activities of and absorb the significant losses and receive the significant benefits from each entity. Refer to Note 10, "Equity and Temporary Equity," for additional information on consolidated VIEs.

Sun NG Cisco Grove RV LLC, Sun NG Coyote Ranch RV LLC, Sun NG Kittatinny RV LLC and Sun NG River Beach RV LLC were formed in December 2023 to engage in the sourcing, due diligence, acquisition, management, construction, leasing and disposition of certain RV parks and resorts. The table below shows their respective ownership percentages, representing the common equity interests:

	Sun NG LLC		Third Party Interest
Sun NG Cisco Grove RV LLC	94.8	%	5.2	%
Sun NG Coyote Ranch RV LLC	96.0	%	4.0	%
Sun NG Kittatinny RV LLC	95.9	%	4.1	%
Sun NG River Beach RV LLC	95.9	%	4.1	%

Sun NG Beaver Brook RV LLC was formed during the three months ended September 30, 2022. The purpose of the company is to engage in the sourcing, due diligence, acquisition, management, construction, leasing and disposition of a recreational vehicle park and resort. The Company's ownership percentages were split between Sun NG LLC and NG Beaver Brook, LLC in the ratio of 70% and 30%, representing common equity interests. In December 2023, the terms were amended which resulted in the Company ownership percentages split between Sun NG LLC and NG Beaver Brook, LLC changing to a ratio of 98.4% and 1.6%, respectively, representing the common equity interests.

The following table summarizes the assets and liabilities of our consolidated VIEs after eliminations, with the exception of the Operating Partnership, included in our Consolidated Balance Sheets (in millions):

	March 31, 2024		December 31, 2023
Assets
Investment property, net	$	136.4	$	132.3
Cash, cash equivalents and restricted cash	3.5		2.9
Other intangible assets, net	0.1		0.1
Other assets, net	0.4		0.4
Total Assets	$	140.4	$	135.7
Liabilities and Other Equity
Secured debt	$	3.2	$	3.2
Advanced reservation deposits and rent	0.9		0.4
Accrued expenses and accounts payable	24.0		24.1
Total Liabilities	28.1		27.7
Temporary equity	10.9		10.7
Total Liabilities and Other Equity	$	39.0	$	38.4

Total assets related to the consolidated VIEs, with the exception of the Operating Partnership, comprised 0.8% of our consolidated total assets at March 31, 2024 and December 31, 2023. Total liabilities comprised 0.3% of our consolidated total liabilities at March 31, 2024 and December 31, 2023. Equity Interests and Noncontrolling interests related to the consolidated VIEs, on an absolute basis, comprised less than 1.0% of our consolidated total equity at March 31, 2024 and December 31, 2023.

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Debt and Line of Credit

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Debt and Line of Credit

9. Debt and Line of Credit

The following table sets forth certain information regarding debt, including premiums, discounts and deferred financing costs (in millions, except for statistical information):

	Carrying Amount				Weighted Average Years to Maturity		Weighted Average Interest Rates
	March 31, 2024		December 31, 2023		March 31, 2024	December 31, 2023	March 31, 2024		December 31, 2023
Secured Debt
Mortgage loans payable(1)	$	3,465.5	$	3,478.9	8.9	9.2	3.995	%	3.994	%
Secured borrowings on collateralized receivables(2)	56.1		55.8		13.9	14.2	8.559	%	8.556	%
Total Secured Debt	$	3,521.6	$	3,534.7
Unsecured Debt
Senior unsecured notes(3)	2,673.7		2,177.5		6.8	7.5	3.778	%	3.375	%
Line of credit and other debt(4)	1,676.7		2,065.1		2.0	1.7	5.186	%	5.428	%
Total Unsecured Debt	4,350.4		4,242.6
Total Debt	$	7,872.0	$	7,777.3	6.8	6.8	4.207	%	4.234	%

(1) Balances at March 31, 2024 and December 31, 2023 include zero net debt premium, as of each such date, and $16.2 million and $16.9 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

(2) Balances at March 31, 2024 and December 31, 2023 include fair value adjustments of $3.5 million and $1.9 million, respectively.

(3) Balances at March 31, 2024 and December 31, 2023 include $6.9 million and $6.5 million of net debt discount, respectively, and $19.4 million and $16.0 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

(4) Balances at March 31, 2024 and December 31, 2023 include zero and $1.6 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

Secured Debt

Mortgage term loans

During the three months ended March 31, 2024 and the year ended December 31, 2023, no mortgage term loans were repaid.

During the three months ended March 31, 2024 we did not enter into any mortgage term loans. During the year ended December 31, 2023, we entered into the following mortgage term loans during the quarters presented below (in millions, except for statistical information):

Period	Loan Amount			Term (in years)	Interest Rate		Maturity Date
Three months ended December 31, 2023	$	252.8	(1)	7	6.49	%	November 1, 2030
Three months ended March 31, 2023	$	85.0	(2)	3	5.0	%	February 13, 2026
	$	99.1	(3)	7 - 10	5.72	%	April 1, 2030 - April 1, 2033

(1)Includes two newly encumbered properties.

(2)Includes five existing encumbered properties.

(3)Includes 22 existing encumbered properties.

The mortgage term loans, which total $3.5 billion as of March 31, 2024, are secured by 156 properties comprised of 62,848 sites representing approximately $2.7 billion of net book value.

Secured Borrowings on Collateralized Receivables

Refer to Note 5, "Collateralized Receivables and Transfers of Financial Assets," for information on Secured Borrowings on Collateralized Receivables.

Unsecured Debt

Senior Unsecured Notes

The following table sets forth certain information regarding our outstanding senior unsecured notes (in millions, except for statistical information). All senior unsecured notes include interest payments on a semi-annual basis in arrears, and are recorded within the Unsecured debt line item on the Consolidated Balance Sheets.

			Carrying Amount
	Principal Amount		March 31, 2024		December 31, 2023
5.5% notes, issued in January 2024 and due in January 2029(1)	$	500.0	$	495.6	$	—
5.7% notes, issued in January 2023 and due in January 2033	400.0		395.8		395.7
4.2% notes, issued in April 2022 and due in April 2032	600.0		592.7		592.6
2.3% notes, issued in October 2021 and due in November 2028	450.0		447.0		446.8
2.7% notes, issued in June 2021 and October 2021, and due in July 2031	750.0		742.6		742.4
Total	$	2,700.0	$	2,673.7	$	2,177.5

(1) In January 2024, the Operating Partnership issued $500.0 million of senior unsecured notes with an interest rate of 5.5% and a five-year term, due January 15, 2029 (the "2029 Notes"). Interest on the 2029 Notes is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2024. The net proceeds from the offering were $495.4 million, after deducting underwriters' discounts and estimated offering expenses. We used the majority of the net proceeds to repay borrowings outstanding under our Senior Credit Facility.

Line of Credit

The Operating Partnership (as borrower), SUI (as guarantor), and certain lenders are parties to a credit agreement which governs our senior credit facility (the "Senior Credit Facility").

Prior to March 2024, the aggregate amount of our Senior Credit Facility was $4.2 billion with the ability to upsize the total borrowings by an additional $800.0 million, subject to certain conditions. The aggregate amount under the Senior Credit Facility consisted of the following: (a) a revolving loan in an amount up to $3.05 billion and (b) a term loan facility of $1.15 billion, with the ability to draw funds from the combined facilities in U.S. dollars, Pound sterling, Euros, Canadian dollars and Australian dollars, subject to certain limitations. The maturity date of the revolving term loan facility is April 7, 2026. At our option that maturity date may be extended two additional six-month periods. The maturity date of the term loan facility was April 7, 2025.

In March 2024, we terminated the term loan facility and settled the associated $1.1 billion of borrowings outstanding under the term loan by increasing our borrowings under the revolving loan of the Senior Credit Facility. Subsequent to the termination of the term loan, our aggregate borrowing capacity under the Senior Credit Facility was reduced to the original capacity under the revolving loan of $3.05 billion. During the three months ended March 31, 2024, we recognized a Loss on extinguishment of debt in our Consolidated Statements of Operations of $0.6 million related to the termination of the term loan facility.

The Senior Credit Facility bears interest at a floating rate based on the Adjusted Term Secured Overnight Financing Rate ("SOFR"), the Adjusted Eurocurrency Rate, the Australian Bank Bill Swap Bid Rate ("BBSY"), the Daily Sterling Overnight Index Average ("SONIA") Rate or the Canadian Dollar Offered Rate, as applicable, plus a margin, in all cases, which can range from 0.725% to 1.6%, subject to certain adjustments. As of March 31, 2024, the margins based on our credit ratings were 0.85% on the revolving loan facility.

At the lenders' option, the Senior Credit Facility will become immediately due and payable upon an event of default under the Credit Facility Agreement. We had $1.7 billion and $944.1 million of borrowings outstanding under the revolving loan as of March 31, 2024 and December 31, 2023, respectively. We also had zero and $1.1 billion of borrowings outstanding under the term loan on the Senior Credit Facility as of March 31, 2024 and December 31, 2023, respectively. These balances are recorded in Unsecured debt on the Consolidated Balance Sheets.

The Senior Credit Facility provides us with the ability to issue letters of credit. Our issuance of letters of credit does not increase our borrowings outstanding under the Senior Credit Facility, but does reduce the borrowing amount available. We had $11.2 million and $26.2 million of outstanding letters of credit at March 31, 2024 and December 31, 2023, respectively.

Unsecured Term Loan

In October 2019, we assumed a $58.0 million secured term loan facility related to an acquisition. The term loan initially had a four-year term ending October 29, 2023, and bore interest at a floating rate based on the Eurodollar rate or Prime rate plus a margin ranging from 1.2% to 2.05%. Effective July 1, 2021, we amended the agreement to release the associated collateral, extend the term loan facility maturity date to October 29, 2025 and adjust the interest rate margin to a range from 0.8% to 1.6%. In August 2022, we amended the secured term loan facility to transition from the Eurodollar rate to SOFR. As of March 31, 2024, the margin based on our credit rating was 0.95%. The outstanding balance was $3.9 million and $7.8 million at March 31, 2024 and December 31, 2023, respectively. These balances are recorded in Unsecured debt on the Consolidated Balance Sheets.

Covenants

The mortgage term loans, senior unsecured notes and Senior Credit Facility are subject to various financial and other covenants. The most restrictive covenants are pursuant to (a) the terms of the Senior Credit Facility, which contains a maximum leverage ratio, minimum fixed charge coverage ratio and maximum secured leverage ratio, and (b) the terms of the senior unsecured notes, which contain a total debt to total assets ratio, secured debt to total assets ratio, consolidated income available for debt service to debt service ratio and unencumbered total asset value to unsecured debt ratio. At March 31, 2024, we were in compliance with all financial covenants.

In addition, certain of our subsidiary borrowers own properties that secure loans. These subsidiaries are consolidated within our accompanying Consolidated Financial Statements, however, each of these subsidiaries' assets and credit are not available to satisfy our debts and other obligations, and any of our other subsidiaries or any other person or entity.

Interest Capitalized

We capitalize interest during the construction and development of our communities. Capitalized interest costs associated with construction and development activities during the three months ended March 31, 2024 and 2023 were as follows (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Interest capitalized	$	2.7	$	2.5

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Equity and Temporary Equity

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Equity and Temporary Equity

10. Equity and Temporary Equity

Temporary Equity

Redeemable Preferred OP Units

Temporary equity includes preferred securities that are redeemable for cash at the holder's option or upon the occurrence of an event that is not solely within our control based on a fixed or determinable price. These securities are not mandatorily redeemable for cash nor do they contain a fixed maturity date. The following table sets forth the various series of redeemable preferred OP units that were outstanding as of March 31, 2024 and December 31, 2023 and the related terms, and summarizes the balance included within Temporary Equity on our Consolidated Balance Sheets (in millions, except for statistical information):

Description	OP Units Outstanding	Exchange Rate(1)	Annual Distribution Rate(2)		Cash Redemption(3)	Redemption Period	Carrying Amount
	March 31, 2024						March 31, 2024		December 31, 2023
Series D preferred OP units	488,958	0.8000	4.0	%	Holder's Option	Any time	$	47.3	$	46.9
Series F preferred OP units	90,000	0.6250	3.0	%	Holder's Option	Any time after earlier of May 14, 2025 or death of holder	8.5		8.5
Series G preferred OP units	205,812	0.6452	3.2	%	Holder's Option	Any time after earlier of September 30, 2025 or death of holder	19.8		20.4
Series H preferred OP units	581,229	0.6098	3.0	%	Holder's Option	Any time after earlier of October 30, 2025 or death of holder	54.9		55.0
Series J preferred OP units	238,000	0.6061	2.85	%	Holder's Option	During the 30-day period following a change of control of the Company or any time after April 21, 2026	22.6		22.7
Series K preferred OP units	1,000,000	0.5882	4.0	%	Holder's Option	Within 60 days after March 23, 2028	95.7		96.7
Total	2,603,999						$	248.8	$	250.2

(1) Exchange rates are subject to adjustment upon stock splits, recapitalizations and similar events. The exchange rates of certain series of OP units are approximated to four decimal places.

(2) Distributions are payable on the issue price of each OP unit, which is $100.00 per unit for all these preferred OP units.

(3) The redemption price for each preferred OP unit redeemed will be equal to its issue price plus all accrued but unpaid distributions.

Redeemable Equity Interests

The following table summarizes the redeemable equity interests included in Temporary Equity on our Consolidated Balance Sheets (in millions):

		Carrying Amount
Equity Interest	Description	March 31, 2024		December 31, 2023
Solar Energy Project CA II LLC	A joint venture that operates and maintains solar energy equipment in select California communities	$	5.2	$	5.1
Solar Energy Project LLC	A joint venture that operates and maintains solar energy equipment in select California communities	2.3		2.3
Solar Energy Project III LLC	A joint venture that operates and maintains solar energy equipment in select Arizona and California communities	2.4		2.3
Other stand-alone joint ventures(1)	In connection with investments in land for future development and joint ventures that operate portfolios of RV communities in the U.S.	1.0		1.0
Total		$	10.9	$	10.7

(1) Refer to Note 8, "Consolidated Variable Interest Entities," for more information on the consolidated VIEs.

Permanent Equity

Universal Shelf Registration Statement

In March 2024, we filed a new universal shelf registration statement on Form S-3 with the SEC. The shelf registration statement was deemed automatically effective and provides for the registration of unspecified amounts of equity and debt securities. The authorized number of shares of our capital stock is 380,000,000 shares, of which 360,000,000 shares are common stock and 20,000,000 shares are preferred stock. As of March 31, 2024, we had 124,641,861 shares of common stock issued and outstanding and no shares of preferred stock were issued and outstanding.

At the Market Offering Sales Agreement

We have entered into an At the Market Offering Sales Agreement with certain sales agents and forward sellers pursuant to which we may sell, from time to time, up to an aggregate gross sales price of $1.25 billion of our common stock (the "ATM"), through the sales agents, acting as our sales agents or, if applicable, as forward sellers, or directly to the sales agents as principals for their own accounts. The sales agents and forward sellers are entitled to compensation in an agreed amount not to exceed 2.0% of the gross price per share for any shares sold under the ATM. Through March 31, 2024, we had entered into forward sales agreements under the ATM for an aggregate gross sales price of $160.6 million.

Issuances of Common OP Units in Connection with the Acquisition of Certain Properties

Three Months Ended March 31, 2024 and 2023	Common OP Units Issued	Value at Issuance (in millions)		Related Acquisition
March 2024	4,452	$	0.6	Land for development
January 2023	31,289	$	4.4	Fox Run

Accumulated Other Comprehensive Income

AOCI attributable to SUI common shareholders is separately presented on our Consolidated Balance Sheets as a component of total SUI shareholders' equity. Other Comprehensive Income ("OCI") attributable to noncontrolling interests is allocated to, and included within, Noncontrolling interests on our Consolidated Balance Sheets. Refer to the Statements of Comprehensive Loss for complete details related to OCI activity in the reporting period.

AOCI attributable to SUI common shareholders consisted of the following, net of tax (in millions):

	March 31, 2024		December 31, 2023
Net foreign currency translation losses	$	(38.7)	$	(29.5)
Accumulated net gains on derivatives	45.4		41.7
Accumulated other comprehensive income	$	6.7	$	12.2

Noncontrolling Interests - Common and Preferred OP Units

The following table summarizes the common and preferred OP units included within Noncontrolling interests on our Consolidated Balance Sheets (in millions, except for shares and statistical information):

Description	OP Units Outstanding	Exchange Rate(1)	Annual Distribution Rate(2)		Cash Redemption	Redemption Period	Carrying Amount
	March 31, 2024						March 31, 2024		December 31, 2023
Common OP units	2,683,654	1.0000	Same distribution rate for common stock		N/A	N/A	$	42.8	$	46.5
Series A-1 preferred OP units	191,812	2.4390	6.0	%	N/A	N/A	10.5		11.5
Series A-3 preferred OP units	40,268	1.8605	4.5	%	N/A	N/A	2.4		2.4
Series C preferred OP units	305,748	1.1100	5.0	%	N/A	N/A	20.9		21.4
Series E preferred OP units	80,000	0.6897	5.5	%	N/A	N/A	6.3		6.4
Series L preferred OP units	20,000	0.6250	3.5	%	N/A	N/A	2.0		2.0
Total	3,321,482						$	84.9	$	90.2

(1) Exchange rates are subject to adjustment upon stock splits, recapitalizations and similar events. The exchange rates of certain series of OP units are approximated to four decimal places.

(2) Distributions are payable on the issue price of each OP unit which is $100.00 per unit for all these preferred OP units.

Conversions

Conversions to Common Stock and Common OP Units - Subject to certain limitations, holders can convert certain series of OP units to shares of our common stock and to common OP units at any time. Below is the activity of conversions during the three months ended March 31, 2024 and 2023:

		Three Months Ended
		March 31, 2024		March 31, 2023
Series	Conversion Rate	Units / Shares Converted	Common Stock(1)	Units / Shares Converted	Common Stock(1)
Aspen preferred OP units	Various	—	—	270,000	86,224
Common OP units	1.0000	55,781	55,781	2,910	2,910
Series A-1 preferred OP units	2.4390	10,332	25,195	—	—
Series C preferred OP units	1.1100	100	111	65	72
Series G preferred OP units	0.6452	4,898	3,160	1,000	645
Series H preferred OP units	0.6098	9	5	25	15
Series J preferred OP units	0.6061	—	—	1,000	606

(1)Calculation may yield minor differences due to rounding incorporated in the above numbers.

Distributions

Distributions declared for the three months ended March 31, 2024 were as follows:

Common Stock, Common OP units and Restricted Stock Distributions	Record Date	Payment Date	Distribution Per Share		Total Distribution (in Millions)
March 31, 2024	3/29/2024	4/15/2024	$	0.94	$	119.7

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Share-Based Compensation

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Share-Based Compensation

11. Share-Based Compensation

As of March 31, 2024, we had two share-based compensation plans: the Sun Communities, Inc. 2015 Equity Incentive Plan (as amended, the "2015 Equity Incentive Plan") and the First Amended and Restated 2004 Non-Employee Director Option Plan (as amended, the "2004 Non-Employee Director Option Plan"). We believe granting equity awards will provide certain executives, key employees and directors additional incentives to promote our financial success and promote employee and director retention by providing an opportunity to acquire or increase the direct proprietary interest of those individuals in our operations and future. Time based awards for directors generally vest over three years. Time based awards for key employees and executives generally vest over five years. Market condition awards for executives generally vest after three years.

During the three months ended March 31, 2024 and 2023, shares were granted as follows:

Grant Period	Type	Plan	Shares Granted	Grant Date Fair Value Per Share			Vesting Type
2024	Key Employees	2015 Equity Incentive Plan	205,540	$	132.10	(1)	Time Based
2024	Executive Officers	2015 Equity Incentive Plan	31,800	$	132.13	(1)	Time Based
2024	Executive Officers	2015 Equity Incentive Plan	41,400	$	98.14	(2)	Market Condition	(3)
2024	Directors	2004 Non-Employee Director Option Plan	20,000	$	129.47	(1)	Time Based	(4)
2023	Key Employees	2015 Equity Incentive Plan	220,258	$	137.16	(1)	Time Based
2023	Executive Officers	2015 Equity Incentive Plan	62,800	$	144.88	(1)	Time Based
2023	Executive Officers	2015 Equity Incentive Plan	82,200	$	108.60	(2)	Market Condition	(3)
2023	Directors	2004 Non-Employee Director Option Plan	16,000	$	148.12	(1)	Time Based	(5)

(1)Represents the weighted average fair value per share of the closing price of our common stock on the dates the shares were awarded.

(2)Represents the weighted average fair value per share of the Monte Carlo simulation fair value price of our market condition awards on the dates the shares were awarded.

(3)Share-based compensation for restricted stock awards with market conditions is measured based on shares expected to vest using a Monte Carlo simulation to determine fair value.

(4)Includes 6,000 shares that were deferred under the 2021 Non-Employee Directors Deferred Compensation Plan and are issuable on future dates.

(5)Includes 2,000 shares that were deferred under the 2021 Non-Employee Directors Deferred Compensation Plan and are issuable on future dates.

The vesting requirements for 166,304 and 203,898 restricted shares granted to our executives, directors and employees were satisfied during the three months ended March 31, 2024 and 2023, respectively.

We capitalize a portion of share-based compensation costs for employees who work directly on construction and development of our communities. We recognized the following share-based compensation costs (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Share-based compensation - expensed(1)	$	10.1	$	9.6
Share-based compensation - capitalized(2)	$	0.4	$	0.7

(1) Recorded within General and administrative expense on the Consolidated Income Statements.

(2) Capitalized to Land improvements and buildings on the Consolidated Balance Sheets.

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Segment Reporting

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Segment Reporting

12. Segment Reporting

ASC Topic 280, "Segment Reporting," establishes standards for the way that business enterprises report information about operating segments in its financial statements. As described in Note 1, "Basis of Presentation," effective January 1, 2024, we expanded our organizational structure from three segments, which consisted of (i) manufactured home ("MH") communities, (ii) recreational vehicle ("RV") communities, and (iii) Marinas to add a fourth segment that includes communities in the United Kingdom ("UK"). The new structure reflects how the chief operating decision maker manages the business, makes operating decisions, allocates resources and evaluates operating performance. Beginning with the three months ended March 31, 2024, we are reporting our financial results consistent with our newly realigned operating segments and have recast prior period amounts to conform to the way we internally manage our business and monitor segment performance. Certain reclassifications have been made to the prior period financial statements and related notes in order to conform to the current period presentation. There was no impact to prior period net income, stockholders' equity or cash flows for any of the reclassifications.

Our four reportable segments are: (i) MH, (ii) RV, (iii) Marina and (iv) UK.

The MH segment owns, operates, develops, or has an interest in, a portfolio of MH communities in the U.S., and is in the business of acquiring, operating and developing ground-up MH communities to provide affordable housing solutions to residents. The MH segment in the U.S. also provides manufactured home sales and leasing services to tenants and prospective tenants of our communities.

The RV segment owns, operates, develops, or has an interest in, a portfolio of RV communities and is in the business of acquiring, operating and developing ground-up RV communities in the U.S. and Canada. It also provides leasing services for vacation rentals within the RV communities.

The Marina segment owns, operates and develops marinas, and is in the business of acquiring and operating marinas in the U.S., with the majority of such marinas concentrated in coastal regions, and others located in various inland regions.

The UK segment owns, operates, develops, or has an interest in, a portfolio of communities, referred to as holiday parks, and is in the business of acquiring, operating and developing communities in the United Kingdom. It also provides home sales and associated site license activities to owners and tenants within the communities.

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Income Taxes

3 Months Ended

Mar. 31, 2024

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

We have elected to be taxed as a real estate investment trust ("REIT") pursuant to Section 856(c) of the Internal Revenue Code of 1986, as amended ("Code"). In order for us to qualify as a REIT, at least 95% of our gross income in any year must be derived from qualifying sources. In addition, a REIT must distribute annually at least 90% of its REIT taxable income (calculated without any deduction for dividends paid and excluding capital gains) to its shareholders and meet other tests.

Qualification as a REIT involves the satisfaction of numerous requirements (on an annual and quarterly basis) established under highly technical and complex Code provisions for which there are limited judicial or administrative interpretations and involves the determination of various factual matters and circumstances not entirely within our control. In addition, frequent changes occur in the area of REIT taxation, which requires us to continually monitor our tax status. We analyzed the various REIT tests and confirmed that we continued to qualify as a REIT during the three months ended March 31, 2024.

As a REIT, we generally will not be subject to U.S. federal income taxes at the corporate level on the ordinary taxable income we distribute to our shareholders as dividends. If we fail to qualify as a REIT in any taxable year, our taxable income could be subject to U.S. federal income tax at regular corporate rates. Even if we qualify as a REIT, we may be subject to certain state and local income taxes, as well as U.S. federal income and excise taxes on our undistributed income. In addition, taxable income from non-REIT activities managed through taxable REIT subsidiaries is subject to federal, state and local income taxes. We are also subject to local income taxes in Canada, Puerto Rico and the United Kingdom due to certain properties located in those jurisdictions. We do not provide for withholding taxes on our undistributed earnings from our Canadian subsidiaries as they are reinvested and will continue to be reinvested indefinitely outside of the U.S. As currently structured, we are not subject to United Kingdom withholding taxes on distributions from our United Kingdom properties.

Deferred tax assets and liabilities reflect the impact of temporary differences between the amounts of assets and liabilities for financial reporting purposes and the basis of such assets and liabilities as measured by tax laws. Deferred tax assets are reduced, if necessary, by a valuation allowance to the amount where realization is more likely than not assured after considering all available evidence. Our temporary differences primarily relate to net operating loss carryforwards, depreciation, interest and basis differences between tax and GAAP. Our deferred tax assets that have a full valuation allowance relate to our taxable REIT subsidiaries. As of March 31, 2024, we had $309.1 million of net deferred tax liabilities, comprised of deferred tax assets, net of valuation allowance of $61.9 million, and deferred tax liabilities of $371.0 million. The deferred tax liability balance is comprised primarily of basis differences in our foreign investment in properties in the United Kingdom and Canada. As of December 31, 2023, we had $277.1 million of net deferred tax liabilities, comprised of deferred tax assets, net of valuation allowance of $58.1 million, and deferred tax liabilities of $335.2 million. The net deferred tax assets and deferred tax liabilities are recorded within Other assets and Other liabilities, respectively, on our Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023.

We had no unrecognized tax benefits as of March 31, 2024 and 2023. We do not expect significant changes in tax positions that would result in unrecognized tax benefits within one year of March 31, 2024.

For the three months ended March 31, 2024, we recorded current tax expense for federal, state, Canadian, Puerto Rican, and United Kingdom income taxes totaling $2.1 million. For the three months ended March 31, 2023, we recorded current tax expense for federal, state, Canadian, Puerto Rican, and United Kingdom income taxes and Australian withholding taxes totaling $3.9 million.

For the three months ended March 31, 2024 and 2023, we recorded a deferred tax benefit of $5.7 million and $4.6 million, respectively.

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Earnings Per Share

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Earnings Per Share

14. Loss Per Share

Loss per share ("EPS") is computed by dividing net loss by the weighted average number of common shares outstanding during the period on a basic and diluted basis. We calculate diluted EPS using the more dilutive of the treasury stock method and the two-class method for stock option and restricted common shares, the treasury stock method for forward equity sales and the if converted method for convertible units.

From time to time, we enter into forward equity sales agreements, which are discussed in Note 10, "Equity and Temporary Equity." We considered the potential dilution resulting from the forward equity sales agreements on the EPS calculations. At inception, the agreements do not have an effect on the computation of basic EPS as no shares are delivered unless there is a physical settlement. Common shares issued upon the physical settlement of the forward equity sales agreements, weighted for the period these common shares are outstanding, are included in the denominator of basic EPS. To determine the dilution resulting from the forward equity sales agreements during the period of time prior to settlement, we calculate the number of weighted-average shares outstanding - diluted in accordance with the treasury stock method.

Our potentially dilutive securities include our potential common shares related to our forward equity offerings, our unvested restricted common shares, and our Operating Partnership outstanding common OP units, Series A-1 preferred OP units, Series A-3 preferred OP units, Series C preferred OP units, Series D preferred OP units, Series E preferred OP units, Series F preferred OP units, Series G preferred OP units, Series H preferred OP units, Series J preferred OP units, Series K preferred OP units, and Series L preferred OP units, which, if converted or exercised, may impact dilution.

Diluted EPS considers the impact of potentially dilutive securities except when the potential common shares have an anti-dilutive effect. Our unvested restricted stock common shares contain rights to receive non-forfeitable distributions and participate equally with common stock with respect to distributions issued or declared, and thus, are participating securities, requiring the two-class method of computing EPS. In calculating the two-class method, undistributed earnings are allocated to both common shares and participating securities based on the weighted average number of shares outstanding during the period. The two-class method determines EPS by (1) dividing the sum of distributed earnings allocated to common shareholders and undistributed earnings allocated to common shareholders by the weighted average number of shares of common stock outstanding for the period; and (2) dividing the sum of distributed earnings allocated to participating securities and undistributed earnings allocated to participating securities by the weighted average number of shares of participating securities for the period. The remaining potential dilutive common shares do not contain rights to distributions and are included in the computation of diluted EPS.

Computations of basic and diluted EPS were as follows (in millions, except for per share data):

	Three Months Ended
	March 31, 2024		March 31, 2023
Numerator			As Restated
Net loss attributable to SUI common shareholders	$	(27.4)	$	(44.9)
Less: allocation to restricted stock awards	(0.2)		(0.2)
Basic earnings - net loss attributable to common shareholders after allocation to restricted stock awards	$	(27.2)	$	(44.7)
Add: allocation to common and preferred OP units dilutive effect	(0.8)		(0.9)
Add: allocation to restricted stock awards	(0.2)		(0.2)
Diluted earnings - net loss attributable to common shareholders after allocation to common and preferred OP units(1)	$	(28.2)	$	(45.8)

Denominator
Weighted average common shares outstanding	123.6		123.3
Add: dilutive restricted stock	0.3		0.4
Add: common and preferred OP units dilutive effect	2.7		2.5
Diluted weighted average common shares and securities(1)	126.6		126.2
EPS Available to Common Shareholders After Allocation
Basic loss per share	$	(0.22)	$	(0.36)
Diluted loss per share(1)	$	(0.22)	$	(0.36)

(1) For the three months ended March 31, 2024 and March 31, 2023, diluted loss per share was calculated using the treasury stock method for restricted common shares as the application of this method resulted in a more diluted loss per share during those periods.

We have excluded certain convertible securities from the computation of diluted EPS because the inclusion of those securities would have been anti-dilutive for the periods presented. The following table presents the outstanding securities that were excluded from the computations of diluted EPS as of March 31, 2024 and 2023 (in thousands):

	As of
	March 31, 2024	March 31, 2023
Common OP units	—	—
A-1 preferred OP units	192	208
A-3 preferred OP units	40	40
Aspen preferred OP units(1)	N/A	989
Series C preferred OP units	306	306
Series D preferred OP units	489	489
Series E preferred OP units	80	80
Series F preferred OP units	90	90
Series G preferred OP units	206	240
Series H preferred OP units	581	581
Series J preferred OP units	238	239
Series K preferred OP units	1,000	1,000
Series L preferred OP units	20	N/A
Total Securities	3,242	4,262

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Derivative Financial Instruments

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

15. Derivative Financial Instruments

Our objective and strategy in using interest rate derivatives is to manage exposure to interest rate movements, thereby minimizing the effect of interest rate changes and the effect they could have on future cash outflows (forecasted interest payments), on a forecasted issuance of long-term debt, or on outstanding floating rate debt. We typically enter into treasury rate locks, interest rate swaps, and forward swaps to accomplish this objective. We do not enter into derivative instruments for speculative purposes. We recognize derivative instruments at fair value on a recurring basis on the Consolidated Balance Sheets and classify the derivatives within Level 2 of the fair value hierarchy. We adjust our Consolidated Balance Sheets on a quarterly basis to reflect the current fair market value of the derivative instruments.

As of March 31, 2024 and December 31, 2023, we held 7 and 13 derivative contracts, which have each been designated as cash flow hedges under ASC Topic 815, "Derivatives and Hedging." The risks being hedged are the interest rate risk related to outstanding floating rate debt and forecasted debt issuance transactions, and the benchmark interest rates used are the SOFR and the SONIA Rate. The unrealized gains or losses on the derivative instruments are recorded in AOCI and are reclassified to Interest expense on the Consolidated Statements of Operations during the same period in which the hedged transaction affects earnings. We estimate that $16.3 million will be reclassified as a reduction to Interest expense over the next 12 months for all of our outstanding cash flow hedges. Cash flow from these derivative instruments is classified in the same category as the cash flow items being hedged on the Consolidated Statements of Cash Flows.

Derivative Contract Activity

During the three months ended March 31, 2024 and 2023, we entered into the following derivative contracts (with notional amounts in millions):

Period (Three months ended)	Number of Contracts	Instrument Type	Currency	Notional Amount		Index Type	Hedged Item
March 31, 2024	1	Interest Rate Swap	USD	$	25.0	SOFR	Future Debt Offering
March 31, 2023	1	Interest Rate Swap	GBP(1)	$	127.3	SONIA	Term Loan Senior Credit Facility
	1	Interest Rate Swap	USD	50.0		SOFR	Future Debt Offering
Total	2			$	177.3

(1) The notional amount of the swap contract in local currency is £100.0 million. The USD equivalent amount is converted as of December 31, 2023.

During the three months ended March 31, 2024 and 2023, we terminated the following derivative contracts (amounts in millions):

Period (Three months ended)	Type	Currency	Notional Amount		Cash Settlement Receipt / (Payment)
March 31, 2024	Forward Swap	USD	$	255.0	$	(2.3)	(1)
March 31, 2023	Treasury Rate Locks & Forward Swap(2)	USD	$	250.0	$	7.4	(2)

(1) Includes seven forward swap contracts which were terminated in connection with the 2029 Notes issuance.

(2) These includes two $100.0 million treasury rate locks and one $50.0 million forward swap which were terminated in connection with the 2033 Notes issuance.

The following table presents the gross fair value amounts of our derivative financial instruments and the associated notional amounts (in millions):

	March 31, 2024						December 31, 2023
Derivatives designated as cash flow hedges	Notional		Fair Value of Assets(1)		Fair Value of Liabilities(2)		Notional		Fair Value of Assets(1)		Fair Value of Liabilities(2)
Interest rate derivatives	$	806.2	$	12.2	$	0.9	$	1,041.5	$	11.7	$	7.7

(1)Included within Other assets, net on the Consolidated Balance Sheets.

(2)Included within Other liabilities on the Consolidated Balance Sheets.

Refer to Note 16, "Fair Value Measurements," for additional information related to the fair value methodology used for derivative financial instruments.

The following table presents the gains / (losses) on derivatives in cash flow hedging relationships recognized in OCI (in millions):

	Three Months Ended
Derivatives designated as cash flow hedges	March 31, 2024		March 31, 2023
Interest rate derivatives	$	8.8	$	(8.6)

The following table presents the amount of gains on derivative instruments reclassified from AOCI into earnings (in millions):

	Financial Statement Classification	Three Months Ended
Derivatives designated as cash flow hedges		March 31, 2024		March 31, 2023
Interest rate derivatives	Interest expense	$	4.9	$	2.3

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Fair Value of Financial Instruments

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

16. Fair Value Measurements

Our financial instruments consist primarily of cash, cash equivalents and restricted cash, notes and other receivables, derivative assets, debt, warrants and other liabilities. We utilize fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures, pursuant to ASC 820, "Fair Value Measurements and Disclosures." The following methods and assumptions were used in order to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value:

ASC 820, "Fair Value Measurements and Disclosures," requires disclosure regarding determination of fair value for assets and liabilities and establishes a hierarchy under which these assets and liabilities must be grouped, based on significant levels of observable or unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect our market assumptions. This hierarchy requires the use of observable market data when available. These two types of inputs have created the following fair value hierarchy:

Level 1 - Quoted unadjusted prices for identical instruments in active markets that we have the ability to access;

Level 2 - Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable (e.g., interest rates, yield curves, prepayment speeds, default rates, loss severity, etc.) in active markets or can be corroborated by observable market data; and

Level 3 - Valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. The unobservable inputs reflect our assumptions about the assumptions that market participants would use.

Assets by Hierarchy Level

The table below sets forth our financial assets and liabilities (in millions) that required disclosure of fair value on a recurring basis as of March 31, 2024. The table presents the carrying values and fair values of our financial instruments as of March 31, 2024 and December 31, 2023, that were measured using the valuation techniques described above. The table excludes other financial instruments such as other receivables and accounts payable as the carrying values associated with these instruments approximate their fair value since their maturities are less than one year. These financial instruments are classified as Level 1 in the hierarchy.

	March 31, 2024
			Fair Value
	Carrying Value		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial Assets
Cash, cash equivalents and restricted cash	$	132.5	$	132.5	$	—	$	—	$	132.5
Installment notes receivable on manufactured homes, net	38.3		—		—		38.3		38.3
Notes receivable from real estate developers and operators	127.7		—		—		127.7		127.7
Collateralized receivables, net	56.5		—		—		56.5		56.5
Derivative assets	12.2		—		12.2		—		12.2
Total assets measured at fair value	$	367.2	$	132.5	$	12.2	$	222.5	$	367.2
Financial Liabilities
Mortgage loan payable	$	3,465.5	$	—	$	3,089.3	$	—	$	3,089.3
Secured borrowings on collateralized receivables	56.1		—		—		56.1		56.1
Total secured debt	3,521.6		—		3,089.3		56.1		3,145.4
Unsecured debt
Senior unsecured notes	2,673.7		—		2,440.0		—		2,440.0
Line of credit and other unsecured debt	1,676.7		—		1,676.7		—		1,676.7
Total unsecured debt	4,350.4		—		4,116.7		—		4,116.7
Derivative liabilities	0.9		—		0.9		—		0.9
Other financial liabilities (contingent consideration)	20.2		—		—		20.2		20.2
Total liabilities measured at fair value	$	7,893.1	$	—	$	7,206.9	$	76.3	$	7,283.2

	December 31, 2023
			Fair Value
	Carrying Value		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial Assets
Cash, cash equivalents and restricted cash	$	42.7	$	42.7	$	—	$	—	$	42.7
Installment notes receivable on manufactured homes, net	19.6		—		—		19.6		19.6
Notes receivable from real estate developers and operators	134.5		—		—		134.5		134.5
Collateralized receivables, net	56.2		—		—		56.2		56.2
Derivative assets	11.7		—		11.7		—		11.7
Total assets measured at fair value	$	264.7	$	42.7	$	11.7	$	210.3	$	264.7
Financial Liabilities
Mortgage loan payable	$	3,478.9	$	—	$	3,167.0	$	—	$	3,167.0
Secured borrowings on collateralized receivables	55.8		—		—		55.8		55.8
Total secured debt	3,534.7		—		3,167.0		55.8		3,222.8
Unsecured debt
Senior unsecured notes	2,177.5		—		1,973.2		—		1,973.2
Line of credit and other unsecured debt	2,065.1		—		2,065.1		—		2,065.1
Total unsecured debt	4,242.6		—		4,038.3		—		4,038.3
Derivative liabilities	7.7		—		7.7		—		7.7
Other financial liabilities (contingent consideration)	20.2		—		—		20.2		20.2
Total liabilities measured at fair value	$	7,805.2	$	—	$	7,213.0	$	76.0	$	7,289.0

We utilize fair value measurements to record fair value adjustments to certain assets and liabilities and to determine fair value disclosures. The following methods and assumptions were used in order to estimate the fair value of each class of financial instruments for which it is practicable to estimate that value:

Cash, Cash Equivalents and Restricted Cash

The carrying values of cash, cash equivalents and restricted cash approximate their fair market values due to the short-term nature of the instruments. These are classified as Level 1 in the hierarchy.

Marketable Securities

The fair value of marketable securities is measured by the quoted unadjusted share price which is readily available in active markets (Level 1). We had zero marketable securities as of March 31, 2024. The change in the marketable securities balance was as follows (in millions):

	Year Ended
Marketable Securities	December 31, 2023
Beginning Balance	$	127.3
Change in fair value measurement	(16.0)
Foreign currency exchange losses	(7.8)
Dispositions(1)	(103.5)
Ending Balance	$	—

(1)During the year ended December 31, 2023, we sold our 41.8 million share position in Ingenia, generating $102.5 million of proceeds, net of $1.0 million of underwriting and other fees, with a realized loss of $8.0 million. The proceeds were used to pay down amounts drawn under our Senior Credit Facility.

Installment Notes Receivable on Manufactured Homes and Collateralized Receivables

Installment notes receivable on manufactured homes are recorded at fair value and are measured using model-derived indicative pricing using primarily unobservable inputs, inclusive of default rates, interest rates and recovery rates (Level 3). Refer to Note 4, "Notes and Other Receivables," and Note 5, "Collateralized Receivables and Transfers of Financial Assets," for additional information.

Notes Receivable from Real Estate Developers and Operators

Notes receivable from real estate developers and operators are recorded at fair value and are measured using model-derived indicative pricing using primarily unobservable inputs including interest rates and counterparty performance (Level 3). The carrying values of the notes generally approximate their fair market values either due to the nature of the note and / or the note being secured primarily by underlying real estate and other collateral and / or personal guarantees. Refer to Note 4, "Notes and Other Receivables," for additional information.

Derivative Assets and Liabilities - Interest Rate Derivatives

Interest rate derivatives are recorded at fair value and consist of treasury rate lock contracts, interest rate swaps and forward swaps. The fair value of these financial instruments are measured using observable inputs based on the 10-year Treasury note rate, the SOFR and SONIA Rates, respectively (Level 2).

Secured Debt

Secured debt consists primarily of our mortgage term loans. The fair value of mortgage term loans is based on the estimates of management and on rates currently quoted, rates currently prevailing for comparable loans and instruments of comparable maturities (Level 2). Refer to Note 9, "Debt and Line of Credit," for additional information.

Secured borrowings on collateralized receivables - recorded at fair value and adjusted based on the same interest rates as the related collateralized receivables (Level 3). Refer to Note 5, "Collateralized Receivables and Transfers of Financial Assets," and Note 9, "Debt and Line of Credit," for additional information.

Unsecured Debt

Senior unsecured notes - the fair value of senior unsecured notes is based on the estimates of management and on rates currently quoted, rates currently prevailing for comparable loans and instruments of comparable maturities (Level 2). Refer to Note 9, "Debt and Line of Credit," for additional information.

Line of credit and other unsecured debt - consists primarily of our Senior Credit Facility. We have variable rates on our Senior Credit Facility. The fair value of the debt with variable rates approximates carrying value as the interest rates of these amounts approximate market rates (Level 2). The estimated fair value of our debt as of March 31, 2024 approximated its gross carrying value.

Other Financial Liabilities

We estimate the fair value of contingent consideration liabilities based on valuation models using significant unobservable inputs that generally consider discounting of future cash flows using market interest rates and adjusting for non-performance risk over the remaining term of the liability (Level 3).

Level 3 Reconciliation, Measurements and Transfers

We review the fair value hierarchy classifications each reporting period. Changes in the observability of the valuation attributes may result in a reclassification of certain financial assets or liabilities. Such reclassifications are reported as transfers in and out of Level 3 at the beginning fair value for the reporting period in which the changes occur. Availability of secondary market activity and consistency of pricing from third-party sources impacts our ability to classify securities as Level 2 or Level 3. There were no transfers into or out of Level 3 during the three months ended March 31, 2024.

The following tables summarize changes to our financial instruments carried at fair value and classified within Level 3 of the fair value hierarchy for the three months ended March 31, 2024 and 2023 (in millions):

	Three Months Ended
	March 31, 2024									March 31, 2023
Assets	Installment Notes Receivable on MH, net			Notes Receivable From Real Estate Developers and Operators			Collateralized Receivables, net			Installment Notes Receivable on MH, net			Notes Receivable From Real Estate Developers and Operators		Warrants
Level 3 beginning balance at December 31, 2023 and 2022	$	19.6		$	134.5		$	56.2		$	65.9		$	305.2	$	—
Realized gains / (losses)	—		(1)	(0.8)		(1)	1.6		(2)	(1.7)		(1)	—		(0.4)		(3)
Purchases and issuances	19.4			5.0			—			0.1			124.3		0.4
Sales and settlements	(0.7)			(10.9)			(1.3)			(2.1)			(3.0)		—
Foreign currency exchange losses	—			(0.1)			—			—			—		—
Other adjustments	—			—			—			—			8.5		—
Level 3 ending balance at March 31, 2024 and 2023	$	38.3		$	127.7		$	56.5		$	62.2		$	435.0	$	—

(1) Realized losses recorded within Loss on remeasurement of notes receivable on the Consolidated Statements of Operations.

(2) Realized gains recorded within Other income / (expense), net on the Consolidated Statements of Operations.

(3) Realized losses recorded within Income / (loss) from nonconsolidated affiliates within on the Consolidated Statements of Operations.

	Three Months Ended
	March 31, 2024				March 31, 2023
Liabilities	Secured Borrowing on Collateralized Receivables		Contingent Consideration		Contingent Consideration
Level 3 beginning balance December 31, 2023 and 2022	$	55.8	$	20.2	$	20.2
Realized losses(1)	1.6		—		—
Purchases and issuances	—		—		—
Sales and settlements	(1.3)		—		—
Other adjustments	—		—		—
Level 3 ending balance at March 31, 2024 and 2023	$	56.1	$	20.2	$	20.2

(1) Realized losses are recorded within Other income / (expense), net on the Consolidated Statements of Operations.

Although we have determined the estimated fair value amounts using available market information and commonly accepted valuation methodologies, considerable judgment is required in interpreting market data to develop fair value estimates. The fair value estimates are based on information available as of March 31, 2024. As such, our estimates of fair value could differ significantly from the actual carrying value.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

17. Commitments and Contingencies

Legal Proceedings - Class Action Litigation

Since August 31, 2023, several putative class action complaints have been filed in the U.S. District Court for the Northern District of Illinois, Eastern Division, against Datacomp Appraisal Systems, Inc., us, and nine other large MH operators in the U.S. The complaint alleges that the defendants have violated federal antitrust laws by sharing and receiving competitively sensitive non-public information to maintain artificially high site rents. The complaints have been consolidated into the case captioned In re Manufactured Home Lot Rents Antitrust Litigation, No. 1:23-cv-06715.

Plaintiffs seek both injunctive and monetary damages, as well as attorneys' fees. We are unable to estimate a range of loss, if any, that could result were there to be an adverse final decision in this litigation. If an unfavorable result were to occur, it is possible that the impact could be material to our results of operations in the periods in which any such outcome becomes probable and estimable.

We believe that the plaintiffs' allegations are without merit and intend to defend against them vigorously. However, litigation is inherently uncertain and there can be no assurance regarding the likelihood that our defense of this litigation will be successful.

Other Legal Proceedings

We are involved in various other legal proceedings arising in the ordinary course of business. All such proceedings, taken together, are not expected to have a material adverse impact on our results of operations or financial condition.

Catastrophic Event-Related Charges

Hurricane Ian - When Hurricane Ian made landfall on Florida's western coast in September 2022, the storm primarily affected three properties in the Fort Myers area, comprising approximately 2,500 sites. These properties sustained significant flooding and wind damage from the hurricane. At other affected MH and RV properties, most of the damage was limited to trees, roofs, fences, skirting and carports. At affected marina properties, docks, buildings, and landscaping sustained wind and water damage.

We maintain property, casualty, flood and business interruption insurance for our community portfolio, subject to customary deductibles and limits.

Estimated property insurance recoveries, excluding business interruption recoveries, of $52.8 million related to Hurricane Ian were recorded in Notes and other receivables, net on the Consolidated Balance Sheets as of March 31, 2024.

The table below sets forth changes in estimated property insurance recoveries, excluding business interruption recoveries (in millions):

	Three Months Ended March 31, 2024
Total estimated insurance receivable - December 31, 2023	$	56.7
Change in estimated property insurance recoveries	3.0
Proceeds received from insurer	(6.9)
Total estimated insurance receivable - March 31, 2024	$	52.8

Changes in estimated property insurance recoveries related to Hurricane Ian during the three months ended March 31, 2024 were primarily the result of $3.0 million of incremental costs that exceeded the applicable deductible. The foregoing estimates are based on current information available, and we continue to assess these estimates. Actual charges and insurance recoveries could vary significantly from these estimates. Any changes to these estimates will be recognized in the period(s) in which they are determined.

We are actively working with our insurance providers on claims for business interruption recoveries. During the three months ended March 31, 2024 and 2023, we did not recognize any business interruption recoveries for lost earnings from the hurricane event. The related communities are under redevelopment. As such, we currently cannot estimate a date when operating results will be restored to pre-hurricane levels. Our business interruption insurance policy provides for up to 60 months of coverage from the date of restoration.

Other - In December 2023, one of our RV properties with approximately 300 sites sustained property damage due to heavy rainfall and flooding in the North Conway, New Hampshire area. Based on a preliminary review performed by an insurance adjuster, we recognized asset impairment charges of $7.0 million during the three months ended December 31, 2023, primarily related to site improvements, vacation rental cabins, and equipment. During the three months ended March 31, 2024, we recognized incremental charges of $4.7 million related to the impacted property, comprised of $3.1 million for impaired assets and $1.6 million for debris removal and cleanup. The charges were recorded within Catastrophic event-related charges, net in our Consolidated Statements of Operations. The foregoing estimates are based on current information available after the preliminary review of the damages incurred. Actual charges and insurance recoveries could differ from these estimates. Any changes to these estimates will be recognized in the period(s) in which they are determined.

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Leases

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Leases

18. Leases

Lessee Accounting

We lease land under non-cancelable operating leases at certain MH, RV, Marina and UK properties expiring at various dates through 2100. The majority of the leases have terms requiring fixed payments plus additional rents based on a percentage of revenues at those properties. We also have other operating leases, primarily office space and equipment expiring at various dates through 2042.

Future minimum lease payments under non-cancellable leases as of March 31, 2024 where we are the lessee include (in millions):

Maturity of Lease Liabilities	Finance Leases		Operating Leases		Total
2024 (excluding three months ended March 31, 2024)	$	4.4	$	10.7	$	15.1
2025	0.5		14.0		14.5
2026	0.5		12.5		13.0
2027	0.5		10.5		11.0
2028	0.5		9.8		10.3
Thereafter	21.3		240.4		261.7
Total Lease Payments	$	27.7	$	297.9	$	325.6
Less: Imputed interest	(13.7)		(136.3)		(150.0)
Present Value of Lease Liabilities	$	14.0	$	161.6	$	175.6

Right-of-use ("ROU") assets and lease liabilities for finance and operating leases as included in our Consolidated Balance Sheets are as follows (in millions):

	Financial Statement Classification	As of
Description		March 31, 2024		December 31, 2023
Lease Assets
Finance lease - ROU asset, net of accumulated amortization	Investment property, net	$	31.7	$	32.6
Operating lease - ROU asset, net	Other assets, net	$	177.4	$	176.0
Below market operating leases, net	Other assets, net	$	93.8	$	95.0
Lease Liabilities
Finance lease liabilities	Other liabilities	$	14.0	$	14.3
Operating lease liabilities	Other liabilities	$	161.6	$	159.5

The components of lease costs for finance and operating leases as included in our Consolidated Statements of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Finance Lease Cost
Amortization of ROU assets	Depreciation and amortization	$	0.7	$	0.7
Interest on lease liabilities	Interest expense	0.2		0.2
Operating lease cost	General and administrative expense, Property operating and maintenance, Depreciation and amortization	4.4		4.6
Variable lease cost	Property operating and maintenance	2.0		1.6
Total Lease Cost		$	7.3	$	7.1

Lease term, discount rates and additional information for finance and operating leases are as follows:

	As of
	March 31, 2024		December 31, 2023
Lease Term and Discount Rate
Weighted-average Remaining Lease Terms (years)
Finance lease	36.86		36.63
Operating lease	34.17		27.71
Weighted-average Discount Rate
Finance lease	3.60	%	3.59	%
Operating lease	3.78	%	3.82	%

	Three Months Ended
	March 31, 2024		March 31, 2023
Other Information (in millions)
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash outflows for operating leases	$	3.0	$	3.3
Financing cash outflows for finance leases	0.2		5.9
Total Cash Paid on Lease Liabilities	$	3.2	$	9.2

Lessor Accounting

We are not the lessor for any finance leases at our MH, RV, Marina or UK properties as of March 31, 2024.

Nearly all of our operating leases with our residents and customers at our MH, RV and UK properties where we are the lessor are either month-to-month or for a time period not to exceed one year. As of March 31, 2024, future minimum lease payments with our residents or customers would not exceed 12 months.

We do not have any operating leases with real estate operators on our MH or UK properties. At our RV communities and marinas, future minimum lease payments under non-cancellable leases with real estate operators where we are the lessor include the following as of March 31, 2024 (in millions):

Maturity of Lease Payments	Operating Leases
2024 (excluding the three months ended March 31, 2024)	$	18.7
2025	18.1
2026	13.1
2027	8.8
2028	7.8
Thereafter	81.5
Total Undiscounted Cash Flows	$	148.0

The components of lease income for our operating leases, as included in our Consolidated Statement of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Operating Leases
Fixed lease income	Income from real property; Brokerage commissions and other revenue, net	$	8.7	$	7.9
Variable lease income(1)	Income from real property; Brokerage commissions and other revenue, net	$	3.4	$	1.5

(1)Consists of rent primarily based on a percentage of operating revenues beyond target thresholds.

Failed Sale Leaseback

In connection with our acquisition of Park Holidays, we assumed ground lease arrangements for 34 UK properties that we concluded to be failed sale-leaseback transactions under ASC Topic 842, "Leases." The arrangements have maturities ranging from 2117 through 2197 with an option to repurchase for £1.00 at the end of the term. The obligation related to the underlying ground leases has been recorded as a financial liability in Other Liabilities on the Consolidated Balance Sheets. The financial liability was $357.1 million and $359.7 million as of March 31, 2024 and December 31, 2023, respectively. The following table presents the future minimum rental payments for this financial liability as of March 31, 2024 (in millions):

Maturity of Financial Liability	March 31, 2024
2024 (excluding three months ended March 31, 2024)	$	10.6
2025	11.9
2026	12.0
2027	12.1
2028	12.0
Thereafter	1,742.9
Total Payments	$	1,801.5
Less: Imputed interest	(1,444.4)
Present Value of Financial Liability	$	357.1

Leases

18. Leases

Lessee Accounting

We lease land under non-cancelable operating leases at certain MH, RV, Marina and UK properties expiring at various dates through 2100. The majority of the leases have terms requiring fixed payments plus additional rents based on a percentage of revenues at those properties. We also have other operating leases, primarily office space and equipment expiring at various dates through 2042.

Future minimum lease payments under non-cancellable leases as of March 31, 2024 where we are the lessee include (in millions):

Maturity of Lease Liabilities	Finance Leases		Operating Leases		Total
2024 (excluding three months ended March 31, 2024)	$	4.4	$	10.7	$	15.1
2025	0.5		14.0		14.5
2026	0.5		12.5		13.0
2027	0.5		10.5		11.0
2028	0.5		9.8		10.3
Thereafter	21.3		240.4		261.7
Total Lease Payments	$	27.7	$	297.9	$	325.6
Less: Imputed interest	(13.7)		(136.3)		(150.0)
Present Value of Lease Liabilities	$	14.0	$	161.6	$	175.6

Right-of-use ("ROU") assets and lease liabilities for finance and operating leases as included in our Consolidated Balance Sheets are as follows (in millions):

	Financial Statement Classification	As of
Description		March 31, 2024		December 31, 2023
Lease Assets
Finance lease - ROU asset, net of accumulated amortization	Investment property, net	$	31.7	$	32.6
Operating lease - ROU asset, net	Other assets, net	$	177.4	$	176.0
Below market operating leases, net	Other assets, net	$	93.8	$	95.0
Lease Liabilities
Finance lease liabilities	Other liabilities	$	14.0	$	14.3
Operating lease liabilities	Other liabilities	$	161.6	$	159.5

The components of lease costs for finance and operating leases as included in our Consolidated Statements of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Finance Lease Cost
Amortization of ROU assets	Depreciation and amortization	$	0.7	$	0.7
Interest on lease liabilities	Interest expense	0.2		0.2
Operating lease cost	General and administrative expense, Property operating and maintenance, Depreciation and amortization	4.4		4.6
Variable lease cost	Property operating and maintenance	2.0		1.6
Total Lease Cost		$	7.3	$	7.1

Lease term, discount rates and additional information for finance and operating leases are as follows:

	As of
	March 31, 2024		December 31, 2023
Lease Term and Discount Rate
Weighted-average Remaining Lease Terms (years)
Finance lease	36.86		36.63
Operating lease	34.17		27.71
Weighted-average Discount Rate
Finance lease	3.60	%	3.59	%
Operating lease	3.78	%	3.82	%

	Three Months Ended
	March 31, 2024		March 31, 2023
Other Information (in millions)
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash outflows for operating leases	$	3.0	$	3.3
Financing cash outflows for finance leases	0.2		5.9
Total Cash Paid on Lease Liabilities	$	3.2	$	9.2

Lessor Accounting

We are not the lessor for any finance leases at our MH, RV, Marina or UK properties as of March 31, 2024.

Nearly all of our operating leases with our residents and customers at our MH, RV and UK properties where we are the lessor are either month-to-month or for a time period not to exceed one year. As of March 31, 2024, future minimum lease payments with our residents or customers would not exceed 12 months.

We do not have any operating leases with real estate operators on our MH or UK properties. At our RV communities and marinas, future minimum lease payments under non-cancellable leases with real estate operators where we are the lessor include the following as of March 31, 2024 (in millions):

Maturity of Lease Payments	Operating Leases
2024 (excluding the three months ended March 31, 2024)	$	18.7
2025	18.1
2026	13.1
2027	8.8
2028	7.8
Thereafter	81.5
Total Undiscounted Cash Flows	$	148.0

The components of lease income for our operating leases, as included in our Consolidated Statement of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Operating Leases
Fixed lease income	Income from real property; Brokerage commissions and other revenue, net	$	8.7	$	7.9
Variable lease income(1)	Income from real property; Brokerage commissions and other revenue, net	$	3.4	$	1.5

(1)Consists of rent primarily based on a percentage of operating revenues beyond target thresholds.

Failed Sale Leaseback

In connection with our acquisition of Park Holidays, we assumed ground lease arrangements for 34 UK properties that we concluded to be failed sale-leaseback transactions under ASC Topic 842, "Leases." The arrangements have maturities ranging from 2117 through 2197 with an option to repurchase for £1.00 at the end of the term. The obligation related to the underlying ground leases has been recorded as a financial liability in Other Liabilities on the Consolidated Balance Sheets. The financial liability was $357.1 million and $359.7 million as of March 31, 2024 and December 31, 2023, respectively. The following table presents the future minimum rental payments for this financial liability as of March 31, 2024 (in millions):

Maturity of Financial Liability	March 31, 2024
2024 (excluding three months ended March 31, 2024)	$	10.6
2025	11.9
2026	12.0
2027	12.1
2028	12.0
Thereafter	1,742.9
Total Payments	$	1,801.5
Less: Imputed interest	(1,444.4)
Present Value of Financial Liability	$	357.1

Leases

18. Leases

Lessee Accounting

We lease land under non-cancelable operating leases at certain MH, RV, Marina and UK properties expiring at various dates through 2100. The majority of the leases have terms requiring fixed payments plus additional rents based on a percentage of revenues at those properties. We also have other operating leases, primarily office space and equipment expiring at various dates through 2042.

Future minimum lease payments under non-cancellable leases as of March 31, 2024 where we are the lessee include (in millions):

Maturity of Lease Liabilities	Finance Leases		Operating Leases		Total
2024 (excluding three months ended March 31, 2024)	$	4.4	$	10.7	$	15.1
2025	0.5		14.0		14.5
2026	0.5		12.5		13.0
2027	0.5		10.5		11.0
2028	0.5		9.8		10.3
Thereafter	21.3		240.4		261.7
Total Lease Payments	$	27.7	$	297.9	$	325.6
Less: Imputed interest	(13.7)		(136.3)		(150.0)
Present Value of Lease Liabilities	$	14.0	$	161.6	$	175.6

Right-of-use ("ROU") assets and lease liabilities for finance and operating leases as included in our Consolidated Balance Sheets are as follows (in millions):

	Financial Statement Classification	As of
Description		March 31, 2024		December 31, 2023
Lease Assets
Finance lease - ROU asset, net of accumulated amortization	Investment property, net	$	31.7	$	32.6
Operating lease - ROU asset, net	Other assets, net	$	177.4	$	176.0
Below market operating leases, net	Other assets, net	$	93.8	$	95.0
Lease Liabilities
Finance lease liabilities	Other liabilities	$	14.0	$	14.3
Operating lease liabilities	Other liabilities	$	161.6	$	159.5

The components of lease costs for finance and operating leases as included in our Consolidated Statements of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Finance Lease Cost
Amortization of ROU assets	Depreciation and amortization	$	0.7	$	0.7
Interest on lease liabilities	Interest expense	0.2		0.2
Operating lease cost	General and administrative expense, Property operating and maintenance, Depreciation and amortization	4.4		4.6
Variable lease cost	Property operating and maintenance	2.0		1.6
Total Lease Cost		$	7.3	$	7.1

Lease term, discount rates and additional information for finance and operating leases are as follows:

	As of
	March 31, 2024		December 31, 2023
Lease Term and Discount Rate
Weighted-average Remaining Lease Terms (years)
Finance lease	36.86		36.63
Operating lease	34.17		27.71
Weighted-average Discount Rate
Finance lease	3.60	%	3.59	%
Operating lease	3.78	%	3.82	%

	Three Months Ended
	March 31, 2024		March 31, 2023
Other Information (in millions)
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash outflows for operating leases	$	3.0	$	3.3
Financing cash outflows for finance leases	0.2		5.9
Total Cash Paid on Lease Liabilities	$	3.2	$	9.2

Lessor Accounting

We are not the lessor for any finance leases at our MH, RV, Marina or UK properties as of March 31, 2024.

Nearly all of our operating leases with our residents and customers at our MH, RV and UK properties where we are the lessor are either month-to-month or for a time period not to exceed one year. As of March 31, 2024, future minimum lease payments with our residents or customers would not exceed 12 months.

We do not have any operating leases with real estate operators on our MH or UK properties. At our RV communities and marinas, future minimum lease payments under non-cancellable leases with real estate operators where we are the lessor include the following as of March 31, 2024 (in millions):

Maturity of Lease Payments	Operating Leases
2024 (excluding the three months ended March 31, 2024)	$	18.7
2025	18.1
2026	13.1
2027	8.8
2028	7.8
Thereafter	81.5
Total Undiscounted Cash Flows	$	148.0

The components of lease income for our operating leases, as included in our Consolidated Statement of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Operating Leases
Fixed lease income	Income from real property; Brokerage commissions and other revenue, net	$	8.7	$	7.9
Variable lease income(1)	Income from real property; Brokerage commissions and other revenue, net	$	3.4	$	1.5

(1)Consists of rent primarily based on a percentage of operating revenues beyond target thresholds.

Failed Sale Leaseback

In connection with our acquisition of Park Holidays, we assumed ground lease arrangements for 34 UK properties that we concluded to be failed sale-leaseback transactions under ASC Topic 842, "Leases." The arrangements have maturities ranging from 2117 through 2197 with an option to repurchase for £1.00 at the end of the term. The obligation related to the underlying ground leases has been recorded as a financial liability in Other Liabilities on the Consolidated Balance Sheets. The financial liability was $357.1 million and $359.7 million as of March 31, 2024 and December 31, 2023, respectively. The following table presents the future minimum rental payments for this financial liability as of March 31, 2024 (in millions):

Maturity of Financial Liability	March 31, 2024
2024 (excluding three months ended March 31, 2024)	$	10.6
2025	11.9
2026	12.0
2027	12.1
2028	12.0
Thereafter	1,742.9
Total Payments	$	1,801.5
Less: Imputed interest	(1,444.4)
Present Value of Financial Liability	$	357.1

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Recent Accounting Pronouncements

3 Months Ended

Mar. 31, 2024

Accounting Changes and Error Corrections [Abstract]

Recent Accounting Pronouncements

19. Recent Accounting Pronouncements

Recent Accounting Pronouncements - Adopted

In March 2020, the FASB issued ASU 2020-04, "Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting," which provides optional guidance for accounting for contracts, hedging relationships and other transactions affected by the reference rate reform, if certain criteria are met. The provisions of this standard were available for election through December 31, 2022. In December 2022, the FASB issued ASU 2022-06, "Reference Rate Reform (Topic 848) - Deferral of the Sunset Date of Topic 848," which defers the sunset date for Topic 848 from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848. As of March 31, 2024, all of our debt and derivative instruments have been converted from LIBOR to alternative reference rates. The adoption of this ASU did not have a material impact on our Consolidated Financial Statements as the majority of our debt has fixed interest rates.

Recent Accounting Pronouncements - Not Yet Adopted

In October 2023, the FASB issued ASU 2023-06, "Disclosure Improvements: Codification Amendments in Response to the SEC's Disclosure Update and Simplification Initiative," which adds interim and annual disclosure requirements to the US GAAP codification at the request of the SEC. The new guidance is intended to align GAAP requirements with those of the SEC and to facilitate the application of GAAP for all entities. These disclosure requirements are currently included in either SEC Regulation S-X or SEC Regulation S-K. The effective date for each amendment will be the date on which the SEC's removal of that related disclosure from Regulation S-X or Regulation S-K becomes effective. Early adoption is prohibited and the amendments should be applied prospectively. If the SEC has not removed the applicable requirement from Regulation S-X or Regulation S-K by June 30, 2027, the amendments will be removed from the US GAAP codification and will not be effective.

In November 2023, the FASB issued ASU 2023-07, "Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures," which enhances disclosure of significant segment expenses that are regularly provided to the chief operating decision maker to assess segment performance, including each reported measure of segment profit or loss, an amount and description of the composition for other segment items to reconcile to segment profit or loss, interim disclosures of a reportable segment's profit or loss and assets, and the title and position of our chief operating decision maker. This ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments should be applied prospectively. We are currently evaluating the provisions of this amendment and the impact on our Consolidated Financial Statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, "Income Taxes (Topic 740): Improvements to Income Tax Disclosures," which requires disclosure of specific categories in the effective tax rate reconciliation as well as provide additional information for reconciling items that meet a quantitative threshold. Further, this amendment requires certain disclosure of income taxes paid disaggregated by federal, state and foreign taxes, and the amount of income taxes paid disaggregated by individual jurisdiction in which income taxes paid meet a quantitative threshold. The new guidance is intended to enhance the transparency and decision usefulness of income tax disclosures. This ASU is effective for fiscal years beginning after December 15, 2024. Early adoption is permitted and the amendments should be applied prospectively. We are currently evaluating the provisions of this amendment and the impact on our Consolidated Financial Statements and related disclosures.

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Subsequent Events

3 Months Ended

Mar. 31, 2024

Subsequent Events [Abstract]

Subsequent Events

20. Subsequent Events

Acquisitions

Subsequent to the three months ended March 31, 2024, we acquired the following properties:

Property Name	Property Type	Sites, Wet Slips and Dry Storage Spaces	Development Sites	State, Province or Country	Total Purchase Price (in millions)
Port Milford(1)	Marina	92	—	CT	$	4.0
Oak Leaf	Marina	89	—	CT	5.0
Berth One Palm Beach	Marina	4	—	FL	3.0
Total Subsequent Acquisitions		185	—		$	12.0

(1)In conjunction with the acquisition, we issued 19,326 common OP units valued at $2.5 million.

We have evaluated our Consolidated Financial Statements for subsequent events through the date that this Form 10-Q was issued.

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Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Investment Property

Significant Accounting Policies: Investment Property

Investment property is recorded at cost, less accumulated depreciation.

Impairment of long-lived assets - we review the carrying value of long-lived assets to be held for use for impairment quarterly or whenever events or changes in circumstances indicate a possible impairment. Future events could occur which would cause us to conclude that impairment indicators exist, and significant adverse changes in national, regional, or local market conditions or trends may cause us to change the estimates and assumptions used in our impairment analysis. The results of an impairment analysis could be material to our financial statements. Our primary indicator for potential impairment is based on NOI trends period over period. Circumstances that may prompt a test of recoverability may include a significant decrease in the anticipated market price, an adverse change to the extent or manner in which an asset may be used or in its physical condition or other events that may significantly change the value of the long-lived asset. An impairment loss is recognized when a long-lived asset's carrying value is not recoverable and exceeds estimated fair value.

We estimate the fair value of our long-lived assets based on discounted future cash flows and any potential disposition proceeds for a given asset. Forecasting cash flows requires management to make estimates and assumptions about such variables as the estimated holding period, rental rates, occupancy, development and operating expenses during the holding period, as well as capitalization rates. Management uses its best judgment when developing these estimates and assumptions.

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Revenue (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue

The following table disaggregates our revenue by major source and segment (in millions):

	Three Months Ended
	March 31, 2024										March 31, 2023(1)
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Revenues
Real property	$	238.0	$	104.5	$	96.4	$	38.0	$	476.9	$	224.0	$	99.6	$	89.1	$	28.9	$	441.6
Home sales	27.3		5.5		—		36.1		68.9		40.8		6.4		—		39.1		86.3
Service, retail, dining and entertainment	2.6		6.5		104.5		4.3		117.9		2.6		5.8		91.1		2.9		102.4
Interest	3.1		1.4		0.1		—		4.6		10.3		0.9		0.2		—		11.4
Brokerage commissions and other, net	1.0		0.7		1.0		0.3		3.0		3.8		4.7		0.9		0.1		9.5
Total Revenues	$	272.0	$	118.6	$	202.0	$	78.7	$	671.3	$	281.5	$	117.4	$	181.3	$	71.0	$	651.2

(1) Recast to reflect segment changes.

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Real Estate Acquisitions and Dispositions (Tables)

3 Months Ended

Mar. 31, 2024

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

For the year ended December 31, 2023, we acquired the following properties:

Property Name(1)	Type	Sites, Wet Slips and Dry Storage Spaces	Development Sites	State, Province or Country	Month Acquired
Fox Run	MH: asset acquisition	68	72	MI	January
Savannah Yacht Center	Marina: asset acquisition	24	—	GA	March
	Total	92	72

(1) Property names are subject to changes subsequent to acquisition.

Schedule of Purchase Price Allocation

The following table summarizes the amounts of assets acquired, net of liabilities assumed at the acquisition date and the consideration paid for the acquisitions completed in 2023 (in millions):

	At Acquisition Date										Consideration
	Investment in property		Inventory of manufactured homes, boat parts and retail related items		In-place leases, goodwill and other intangible assets		Other assets / (liabilities), net		Total identifiable assets acquired net of liabilities assumed		Cash and escrow		Temporary and permanent equity(1)		Total consideration
Asset Acquisition(2)
Fox Run(3)	$	7.2	$	—	$	—	$	—	$	7.2	$	2.8	$	4.4	$	7.2
Savannah Yacht Center(4)	100.2		0.1		0.4		4.2		104.9		4.3		100.6		104.9
Total	$	107.4	$	0.1	$	0.4	$	4.2	$	112.1	$	7.1	$	105.0	$	112.1

(1) Refer to Note 10, "Equity and Temporary Equity," for additional detail.

(2) Property names are subject to changes subsequent to acquisition.

(3) In conjunction with the acquisition, the Operating Partnership issued 31,289 common OP units valued at $4.4 million.

(4) In conjunction with the acquisition, the Operating Partnership issued one million Series K preferred OP units valued at $100.6 million.

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Notes And Other Receivables (Tables)

3 Months Ended

Mar. 31, 2024

Notes and Loans Payable, by Type, Current and Noncurrent [Abstract]

Schedule of Notes and Other Receivables

The following table sets forth certain information regarding notes and other receivables (in millions):

	March 31, 2024		December 31, 2023
Installment notes receivable on manufactured homes, net	$	38.3	$	19.6
Notes receivable from real estate developers and operators	127.7		134.5
Other receivables, net	303.1		267.5
Total Notes and Other Receivables, net	$	469.1	$	421.6

Schedule Of Other Receivables

Other receivables, net were comprised of amounts due from the following categories (in millions):

	March 31, 2024		December 31, 2023
MH and annual RV residents for rent, utility charges, fees and other pass-through charges, net(1)	$	83.2	$	65.9
Insurance receivables	65.2		77.8
Home sale proceeds	54.8		28.2
Marina customers for storage, service and lease payments, net(2)	52.8		46.8
Other receivables	47.1		48.8
Total Other Receivables, net	$	303.1	$	267.5

(1)Net of allowance of $5.0 million and $4.8 million as of March 31, 2024 and December 31, 2023, respectively.

(2)Net of allowance of $3.1 million and $2.9 million as of March 31, 2024 and December 31, 2023, respectively.

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Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill during the three months ended March 31, 2024 by reportable segment were as follows (in millions):

	MH		RV		Marina		UK		Total
Balance as of December 31, 2023(1)	$	—	$	9.5	$	541.5	$	182.0	$	733.0
Currency Translation Adjustment	—		—		—		(1.6)		(1.6)
Balance as of March 31, 2024	$	—	$	9.5	$	541.5	$	180.4	$	731.4
Accumulated impairment losses as of March 31, 2024(2)	$	—	$	—	$	—	$	369.9	$	369.9

(1) Recast to reflect segment changes.

(2) During the three months ended March 31, 2024, we performed a qualitative assessment of our goodwill balance in accordance with ASC 350-20, "Goodwill and Other." We concluded that the fair value of each respective reporting segment was more-likely-than-not greater than its carrying value. Accordingly, there were no goodwill impairment charges recorded during the three months ended March 31, 2024. For the year ended December 31, 2023, we recorded aggregate non-cash impairment charges of $369.9 million within Goodwill impairment on the Consolidated Statements of Operations. The decline in fair value of the UK reporting segment was primarily driven by a higher weighted average cost of capital due to changes in the macroeconomic environment, as well as inflationary pressures in the UK causing a decline in financial projections.

Schedule of Finite-Lived Intangible Assets

The gross carrying amounts and accumulated amortization of our intangible assets were as follows (in millions):

		March 31, 2024				December 31, 2023
Other Intangible Asset	Useful Life	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
In-place leases	2 months - 13 years	$	166.1	$	(147.5)	$	166.0	$	(146.2)
Non-competition agreements	5 years	10.5		(6.7)		10.5		(6.2)
Trademarks and trade names	3 - 15 years	84.6		(13.7)		85.3		(12.3)
Customer relationships	4 - 17 years	131.6		(40.5)		131.6		(37.3)
Franchise agreements and other intangible assets	1 - 27 years	48.4		(15.1)		48.4		(14.3)
Total finite-lived assets		$	441.2	$	(223.5)	$	441.8	$	(216.3)
Indefinite-lived assets - Trademarks and trade names	N/A	141.0		—		141.0		—
Indefinite-lived assets - Other	N/A	3.0		—		3.0		—
Total indefinite-lived assets		$	144.0	$	—	$	144.0	$	—
Total		$	585.2	$	(223.5)	$	585.8	$	(216.3)

Schedule of Intangible Assets Amortization Expense

Amortization expenses related to our Other intangible assets were as follows (in millions):

	Three Months Ended
Other Intangible Asset Amortization Expense	March 31, 2024		March 31, 2023
In-place leases	$	1.9	$	3.6
Non-competition agreements	0.5		0.5
Trademarks and trade names	1.4		1.5
Customer relationships	3.2		3.2
Franchise fees and other intangible assets	0.7		0.9
Total	$	7.7	$	9.7

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

We anticipate amortization expense for Other intangible assets to be as follows for the next five years (in millions):

Other Intangible Asset Future Amortization Expense	Remainder 2024		2025		2026		2027		2028
In-place leases	$	5.1	$	6.1	$	3.9	$	2.3	$	0.9
Non-competition agreements	1.6		2.1		0.1		—		—
Trademarks and trade names	4.3		5.7		5.7		5.4		5.3
Customer relationships	9.5		12.7		12.3		12.2		12.1
Franchise agreements and other intangible assets	2.3		3.0		2.7		2.5		2.5
Total	$	22.8	$	29.6	$	24.7	$	22.4	$	20.8

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Investment in Nonconsolidated Affiliates (Tables)

3 Months Ended

Mar. 31, 2024

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Nonconsolidated Affiliates

The investment balance in each nonconsolidated affiliate was as follows (in millions):

Investment	March 31, 2024		December 31, 2023
Investment in Sungenia JV	$	60.6	$	56.8
Investment in GTSC	60.3		60.4
Investment in SV Lift	1.5		1.7
Total	$	122.4	$	118.9

The income / (loss) from each nonconsolidated affiliate is as follows (in millions):

	Three Months Ended
Income / (loss) from Nonconsolidated Affiliates	March 31, 2024		March 31, 2023
RezPlot Systems LLC equity loss(1)	$	—	$	(1.5)
Sungenia JV equity income	0.9		0.6
GTSC equity income	0.9		1.0
SV Lift equity loss	(0.4)		(0.3)
Total Income / (Loss) from Nonconsolidated Affiliates	$	1.4	$	(0.2)

(1) Represents an RV reservation software technology company, operating under the Campspot brand, which we acquired in January 2019 and disposed of our ownership interest in December 2023.

The change in the Sungenia JV investment balance is as follows (in millions):

	Three Months Ended		Year Ended
	March 31, 2024		December 31, 2023
Beginning balance	$	56.8	$	44.5
Cumulative translation adjustment	(1.0)		(0.5)
Contributions	3.9		9.6
Equity earnings	0.9		3.2
Ending Balance	$	60.6	$	56.8

The change in the GTSC investment balance is as follows (in millions):

	Three Months Ended		Year Ended
	March 31, 2024		December 31, 2023
Beginning balance	$	60.4	$	54.5
Contributions	0.2		27.5
Distributions	(6.4)		(20.7)
Equity earnings	0.9		3.3
Fair value adjustment	5.2		(4.2)
Ending Balance	$	60.3	$	60.4

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Consolidated Variable Interest Entities (Tables)

3 Months Ended

Mar. 31, 2024

Disclosure of Variable Interest Entities [Abstract]

Schedule of Variable Interest Entities

The following table summarizes the assets and liabilities of our consolidated VIEs after eliminations, with the exception of the Operating Partnership, included in our Consolidated Balance Sheets (in millions):

	March 31, 2024		December 31, 2023
Assets
Investment property, net	$	136.4	$	132.3
Cash, cash equivalents and restricted cash	3.5		2.9
Other intangible assets, net	0.1		0.1
Other assets, net	0.4		0.4
Total Assets	$	140.4	$	135.7
Liabilities and Other Equity
Secured debt	$	3.2	$	3.2
Advanced reservation deposits and rent	0.9		0.4
Accrued expenses and accounts payable	24.0		24.1
Total Liabilities	28.1		27.7
Temporary equity	10.9		10.7
Total Liabilities and Other Equity	$	39.0	$	38.4

Schedule of Variable Interest Entities, Ownership Percentages

The table below shows their respective ownership percentages, representing the common equity interests:

	Sun NG LLC		Third Party Interest
Sun NG Cisco Grove RV LLC	94.8	%	5.2	%
Sun NG Coyote Ranch RV LLC	96.0	%	4.0	%
Sun NG Kittatinny RV LLC	95.9	%	4.1	%
Sun NG River Beach RV LLC	95.9	%	4.1	%

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Debt and Line of Credit (Tables)

3 Months Ended

Mar. 31, 2024

Debt Disclosure [Abstract]

Schedule of Debt

The following table sets forth certain information regarding debt, including premiums, discounts and deferred financing costs (in millions, except for statistical information):

	Carrying Amount				Weighted Average Years to Maturity		Weighted Average Interest Rates
	March 31, 2024		December 31, 2023		March 31, 2024	December 31, 2023	March 31, 2024		December 31, 2023
Secured Debt
Mortgage loans payable(1)	$	3,465.5	$	3,478.9	8.9	9.2	3.995	%	3.994	%
Secured borrowings on collateralized receivables(2)	56.1		55.8		13.9	14.2	8.559	%	8.556	%
Total Secured Debt	$	3,521.6	$	3,534.7
Unsecured Debt
Senior unsecured notes(3)	2,673.7		2,177.5		6.8	7.5	3.778	%	3.375	%
Line of credit and other debt(4)	1,676.7		2,065.1		2.0	1.7	5.186	%	5.428	%
Total Unsecured Debt	4,350.4		4,242.6
Total Debt	$	7,872.0	$	7,777.3	6.8	6.8	4.207	%	4.234	%

(1) Balances at March 31, 2024 and December 31, 2023 include zero net debt premium, as of each such date, and $16.2 million and $16.9 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

(2) Balances at March 31, 2024 and December 31, 2023 include fair value adjustments of $3.5 million and $1.9 million, respectively.

(3) Balances at March 31, 2024 and December 31, 2023 include $6.9 million and $6.5 million of net debt discount, respectively, and $19.4 million and $16.0 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

(4) Balances at March 31, 2024 and December 31, 2023 include zero and $1.6 million of deferred financing costs, respectively. Weighted average interest rates include the impact of hedge activity.

During the three months ended March 31, 2024 we did not enter into any mortgage term loans. During the year ended December 31, 2023, we entered into the following mortgage term loans during the quarters presented below (in millions, except for statistical information):

Period	Loan Amount			Term (in years)	Interest Rate		Maturity Date
Three months ended December 31, 2023	$	252.8	(1)	7	6.49	%	November 1, 2030
Three months ended March 31, 2023	$	85.0	(2)	3	5.0	%	February 13, 2026
	$	99.1	(3)	7 - 10	5.72	%	April 1, 2030 - April 1, 2033

(1)Includes two newly encumbered properties.

(2)Includes five existing encumbered properties.

(3)Includes 22 existing encumbered properties.

Schedule of Interest Capitalized

Interest Capitalized

We capitalize interest during the construction and development of our communities. Capitalized interest costs associated with construction and development activities during the three months ended March 31, 2024 and 2023 were as follows (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Interest capitalized	$	2.7	$	2.5

Schedule of Long-Term Debt Instruments

The following table sets forth certain information regarding our outstanding senior unsecured notes (in millions, except for statistical information). All senior unsecured notes include interest payments on a semi-annual basis in arrears, and are recorded within the Unsecured debt line item on the Consolidated Balance Sheets.

			Carrying Amount
	Principal Amount		March 31, 2024		December 31, 2023
5.5% notes, issued in January 2024 and due in January 2029(1)	$	500.0	$	495.6	$	—
5.7% notes, issued in January 2023 and due in January 2033	400.0		395.8		395.7
4.2% notes, issued in April 2022 and due in April 2032	600.0		592.7		592.6
2.3% notes, issued in October 2021 and due in November 2028	450.0		447.0		446.8
2.7% notes, issued in June 2021 and October 2021, and due in July 2031	750.0		742.6		742.4
Total	$	2,700.0	$	2,673.7	$	2,177.5

(1) In January 2024, the Operating Partnership issued $500.0 million of senior unsecured notes with an interest rate of 5.5% and a five-year term, due January 15, 2029 (the "2029 Notes"). Interest on the 2029 Notes is payable semi-annually in arrears on January 15 and July 15 of each year, beginning on July 15, 2024. The net proceeds from the offering were $495.4 million, after deducting underwriters' discounts and estimated offering expenses. We used the majority of the net proceeds to repay borrowings outstanding under our Senior Credit Facility.

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Equity and Temporary Equity (Tables)

3 Months Ended

Mar. 31, 2024

Equity [Abstract]

Schedule of Preferred Units

Redeemable Preferred OP Units

Temporary equity includes preferred securities that are redeemable for cash at the holder's option or upon the occurrence of an event that is not solely within our control based on a fixed or determinable price. These securities are not mandatorily redeemable for cash nor do they contain a fixed maturity date. The following table sets forth the various series of redeemable preferred OP units that were outstanding as of March 31, 2024 and December 31, 2023 and the related terms, and summarizes the balance included within Temporary Equity on our Consolidated Balance Sheets (in millions, except for statistical information):

Description	OP Units Outstanding	Exchange Rate(1)	Annual Distribution Rate(2)		Cash Redemption(3)	Redemption Period	Carrying Amount
	March 31, 2024						March 31, 2024		December 31, 2023
Series D preferred OP units	488,958	0.8000	4.0	%	Holder's Option	Any time	$	47.3	$	46.9
Series F preferred OP units	90,000	0.6250	3.0	%	Holder's Option	Any time after earlier of May 14, 2025 or death of holder	8.5		8.5
Series G preferred OP units	205,812	0.6452	3.2	%	Holder's Option	Any time after earlier of September 30, 2025 or death of holder	19.8		20.4
Series H preferred OP units	581,229	0.6098	3.0	%	Holder's Option	Any time after earlier of October 30, 2025 or death of holder	54.9		55.0
Series J preferred OP units	238,000	0.6061	2.85	%	Holder's Option	During the 30-day period following a change of control of the Company or any time after April 21, 2026	22.6		22.7
Series K preferred OP units	1,000,000	0.5882	4.0	%	Holder's Option	Within 60 days after March 23, 2028	95.7		96.7
Total	2,603,999						$	248.8	$	250.2

(1) Exchange rates are subject to adjustment upon stock splits, recapitalizations and similar events. The exchange rates of certain series of OP units are approximated to four decimal places.

(2) Distributions are payable on the issue price of each OP unit, which is $100.00 per unit for all these preferred OP units.

(3) The redemption price for each preferred OP unit redeemed will be equal to its issue price plus all accrued but unpaid distributions.

Schedule of Redeemable Equity

The following table summarizes the redeemable equity interests included in Temporary Equity on our Consolidated Balance Sheets (in millions):

		Carrying Amount
Equity Interest	Description	March 31, 2024		December 31, 2023
Solar Energy Project CA II LLC	A joint venture that operates and maintains solar energy equipment in select California communities	$	5.2	$	5.1
Solar Energy Project LLC	A joint venture that operates and maintains solar energy equipment in select California communities	2.3		2.3
Solar Energy Project III LLC	A joint venture that operates and maintains solar energy equipment in select Arizona and California communities	2.4		2.3
Other stand-alone joint ventures(1)	In connection with investments in land for future development and joint ventures that operate portfolios of RV communities in the U.S.	1.0		1.0
Total		$	10.9	$	10.7

(1) Refer to Note 8, "Consolidated Variable Interest Entities," for more information on the consolidated VIEs.

Schedule of Issuances

Three Months Ended March 31, 2024 and 2023	Common OP Units Issued	Value at Issuance (in millions)		Related Acquisition
March 2024	4,452	$	0.6	Land for development
January 2023	31,289	$	4.4	Fox Run

Schedule of Accumulated Other Comprehensive Income (Loss)

AOCI attributable to SUI common shareholders consisted of the following, net of tax (in millions):

	March 31, 2024		December 31, 2023
Net foreign currency translation losses	$	(38.7)	$	(29.5)
Accumulated net gains on derivatives	45.4		41.7
Accumulated other comprehensive income	$	6.7	$	12.2

Schedule of Noncontrolling Interests

The following table summarizes the common and preferred OP units included within Noncontrolling interests on our Consolidated Balance Sheets (in millions, except for shares and statistical information):

Description	OP Units Outstanding	Exchange Rate(1)	Annual Distribution Rate(2)		Cash Redemption	Redemption Period	Carrying Amount
	March 31, 2024						March 31, 2024		December 31, 2023
Common OP units	2,683,654	1.0000	Same distribution rate for common stock		N/A	N/A	$	42.8	$	46.5
Series A-1 preferred OP units	191,812	2.4390	6.0	%	N/A	N/A	10.5		11.5
Series A-3 preferred OP units	40,268	1.8605	4.5	%	N/A	N/A	2.4		2.4
Series C preferred OP units	305,748	1.1100	5.0	%	N/A	N/A	20.9		21.4
Series E preferred OP units	80,000	0.6897	5.5	%	N/A	N/A	6.3		6.4
Series L preferred OP units	20,000	0.6250	3.5	%	N/A	N/A	2.0		2.0
Total	3,321,482						$	84.9	$	90.2

(1) Exchange rates are subject to adjustment upon stock splits, recapitalizations and similar events. The exchange rates of certain series of OP units are approximated to four decimal places.

(2) Distributions are payable on the issue price of each OP unit which is $100.00 per unit for all these preferred OP units.

Schedule of Conversions

Conversions to Common Stock and Common OP Units - Subject to certain limitations, holders can convert certain series of OP units to shares of our common stock and to common OP units at any time. Below is the activity of conversions during the three months ended March 31, 2024 and 2023:

		Three Months Ended
		March 31, 2024		March 31, 2023
Series	Conversion Rate	Units / Shares Converted	Common Stock(1)	Units / Shares Converted	Common Stock(1)
Aspen preferred OP units	Various	—	—	270,000	86,224
Common OP units	1.0000	55,781	55,781	2,910	2,910
Series A-1 preferred OP units	2.4390	10,332	25,195	—	—
Series C preferred OP units	1.1100	100	111	65	72
Series G preferred OP units	0.6452	4,898	3,160	1,000	645
Series H preferred OP units	0.6098	9	5	25	15
Series J preferred OP units	0.6061	—	—	1,000	606

(1)Calculation may yield minor differences due to rounding incorporated in the above numbers.

Schedule of Distributions Declared

Distributions declared for the three months ended March 31, 2024 were as follows:

Common Stock, Common OP units and Restricted Stock Distributions	Record Date	Payment Date	Distribution Per Share		Total Distribution (in Millions)
March 31, 2024	3/29/2024	4/15/2024	$	0.94	$	119.7

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Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Shares Granted

During the three months ended March 31, 2024 and 2023, shares were granted as follows:

Grant Period	Type	Plan	Shares Granted	Grant Date Fair Value Per Share			Vesting Type
2024	Key Employees	2015 Equity Incentive Plan	205,540	$	132.10	(1)	Time Based
2024	Executive Officers	2015 Equity Incentive Plan	31,800	$	132.13	(1)	Time Based
2024	Executive Officers	2015 Equity Incentive Plan	41,400	$	98.14	(2)	Market Condition	(3)
2024	Directors	2004 Non-Employee Director Option Plan	20,000	$	129.47	(1)	Time Based	(4)
2023	Key Employees	2015 Equity Incentive Plan	220,258	$	137.16	(1)	Time Based
2023	Executive Officers	2015 Equity Incentive Plan	62,800	$	144.88	(1)	Time Based
2023	Executive Officers	2015 Equity Incentive Plan	82,200	$	108.60	(2)	Market Condition	(3)
2023	Directors	2004 Non-Employee Director Option Plan	16,000	$	148.12	(1)	Time Based	(5)

(1)Represents the weighted average fair value per share of the closing price of our common stock on the dates the shares were awarded.

(2)Represents the weighted average fair value per share of the Monte Carlo simulation fair value price of our market condition awards on the dates the shares were awarded.

(3)Share-based compensation for restricted stock awards with market conditions is measured based on shares expected to vest using a Monte Carlo simulation to determine fair value.

(4)Includes 6,000 shares that were deferred under the 2021 Non-Employee Directors Deferred Compensation Plan and are issuable on future dates.

(5)Includes 2,000 shares that were deferred under the 2021 Non-Employee Directors Deferred Compensation Plan and are issuable on future dates.

Schedule of Share-based Compensation Costs

We recognized the following share-based compensation costs (in millions):

	Three Months Ended
	March 31, 2024		March 31, 2023
Share-based compensation - expensed(1)	$	10.1	$	9.6
Share-based compensation - capitalized(2)	$	0.4	$	0.7

(1) Recorded within General and administrative expense on the Consolidated Income Statements.

(2) Capitalized to Land improvements and buildings on the Consolidated Balance Sheets.

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Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Schedule of Segment Information

A presentation of segment financial information is summarized as follows (in millions):

	Three Months Ended
	March 31, 2024										March 31, 2023
											As Restated
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Operating revenues	$	267.9	$	116.5	$	200.9	$	78.4	$	663.7	$	267.4	$	111.8	$	180.2	$	70.9	$	630.3
Operating expenses / Cost of sales	100.5		64.0		139.3		55.0		358.8		107.1		66.5		121.3		54.8		349.7
NOI	$	167.4	$	52.5	$	61.6	$	23.4	$	304.9	$	160.3	$	45.3	$	58.9	$	16.1	$	280.6
Adjustments to arrive at net income
Interest income									4.6										11.4
Brokerage commissions and other revenues, net									3.0										9.5
General and administrative expense									(78.5)										(64.1)
Catastrophic event-related charges, net									(7.2)										(1.0)
Business combination expense, net									—										(2.8)
Depreciation and amortization									(165.3)										(155.6)
Asset impairments									(20.7)										(2.4)
Goodwill impairment									—										(15.4)
Loss on extinguishment of debt (see Note 9)									(0.6)										—
Interest expense									(89.7)										(76.6)
Interest on mandatorily redeemable preferred OP units / equity									—										(1.0)
Loss on remeasurement of marketable securities									—										(19.9)
Gain / (loss) on foreign currency exchanges									1.1										(2.7)
Gain / (loss) on dispositions of properties									5.4										(1.6)
Other income / (expense), net									8.0										(1.0)
Loss on remeasurement of notes receivable									(0.7)										(1.7)
Income / (loss) from nonconsolidated affiliates (see Note 7)									1.4										(0.2)
Gain / (loss) on remeasurement of investment in nonconsolidated affiliates									5.2										(4.5)
Current tax expense									(2.1)										(3.9)
Deferred tax benefit									5.7										4.6
Net Loss									(25.5)										(48.3)
Less: Preferred return to preferred OP units / equity interests									3.2										2.4
Less: Loss attributable to noncontrolling interests									(1.3)										(5.8)
Net Loss Attributable to SUI Common Shareholders									$	(27.4)									$	(44.9)

Schedule of Segment Assets

	March 31, 2024										December 31, 2023(1)
	MH		RV		Marina		UK		Consolidated		MH		RV		Marina		UK		Consolidated
Identifiable Assets
Investment property, net	$	5,267.9	$	3,699.2	$	3,257.6	$	2,233.2	$	14,457.9	$	5,317.4	$	3,718.8	$	3,214.5	$	2,192.9	$	14,443.6
Cash, cash equivalents and restricted cash	71.1		36.9		16.2		8.3		132.5		20.1		11.8		6.4		4.4		42.7
Inventory of manufactured homes	94.4		24.3		—		72.3		191.0		103.1		24.3		—		78.2		205.6
Notes and other receivables, net	211.7		157.7		60.4		39.3		469.1		159.1		119.7		54.3		88.5		421.6
Collateralized receivables, net	56.5		—		—		—		56.5		56.2		—		—		—		56.2
Goodwill	—		9.5		541.5		180.4		731.4		—		9.5		541.5		182.0		733.0
Other intangible assets, net	13.1		28.3		248.5		71.8		361.7		14.3		29.0		252.2		74.0		369.5
Other assets, net	269.0		51.9		250.4		141.9		713.2		271.0		47.6		240.7		109.2		668.5
Total Assets	$	5,983.7	$	4,007.8	$	4,374.6	$	2,747.2	$	17,113.3	$	5,941.2	$	3,960.7	$	4,309.6	$	2,729.2	$	16,940.7

(1) Recast to reflect segment changes.

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Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2024

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

Computations of basic and diluted EPS were as follows (in millions, except for per share data):

	Three Months Ended
	March 31, 2024		March 31, 2023
Numerator			As Restated
Net loss attributable to SUI common shareholders	$	(27.4)	$	(44.9)
Less: allocation to restricted stock awards	(0.2)		(0.2)
Basic earnings - net loss attributable to common shareholders after allocation to restricted stock awards	$	(27.2)	$	(44.7)
Add: allocation to common and preferred OP units dilutive effect	(0.8)		(0.9)
Add: allocation to restricted stock awards	(0.2)		(0.2)
Diluted earnings - net loss attributable to common shareholders after allocation to common and preferred OP units(1)	$	(28.2)	$	(45.8)

Denominator
Weighted average common shares outstanding	123.6		123.3
Add: dilutive restricted stock	0.3		0.4
Add: common and preferred OP units dilutive effect	2.7		2.5
Diluted weighted average common shares and securities(1)	126.6		126.2
EPS Available to Common Shareholders After Allocation
Basic loss per share	$	(0.22)	$	(0.36)
Diluted loss per share(1)	$	(0.22)	$	(0.36)

(1) For the three months ended March 31, 2024 and March 31, 2023, diluted loss per share was calculated using the treasury stock method for restricted common shares as the application of this method resulted in a more diluted loss per share during those periods.

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table presents the outstanding securities that were excluded from the computations of diluted EPS as of March 31, 2024 and 2023 (in thousands):

	As of
	March 31, 2024	March 31, 2023
Common OP units	—	—
A-1 preferred OP units	192	208
A-3 preferred OP units	40	40
Aspen preferred OP units(1)	N/A	989
Series C preferred OP units	306	306
Series D preferred OP units	489	489
Series E preferred OP units	80	80
Series F preferred OP units	90	90
Series G preferred OP units	206	240
Series H preferred OP units	581	581
Series J preferred OP units	238	239
Series K preferred OP units	1,000	1,000
Series L preferred OP units	20	N/A
Total Securities	3,242	4,262

N/A = Not applicable.

(1) All of our outstanding Aspen preferred OP units converted during the year ended December 31, 2023.

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Derivative Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2024

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instrument Activity

During the three months ended March 31, 2024 and 2023, we entered into the following derivative contracts (with notional amounts in millions):

Period (Three months ended)	Number of Contracts	Instrument Type	Currency	Notional Amount		Index Type	Hedged Item
March 31, 2024	1	Interest Rate Swap	USD	$	25.0	SOFR	Future Debt Offering
March 31, 2023	1	Interest Rate Swap	GBP(1)	$	127.3	SONIA	Term Loan Senior Credit Facility
	1	Interest Rate Swap	USD	50.0		SOFR	Future Debt Offering
Total	2			$	177.3

(1) The notional amount of the swap contract in local currency is £100.0 million. The USD equivalent amount is converted as of December 31, 2023.

During the three months ended March 31, 2024 and 2023, we terminated the following derivative contracts (amounts in millions):

Period (Three months ended)	Type	Currency	Notional Amount		Cash Settlement Receipt / (Payment)
March 31, 2024	Forward Swap	USD	$	255.0	$	(2.3)	(1)
March 31, 2023	Treasury Rate Locks & Forward Swap(2)	USD	$	250.0	$	7.4	(2)

(1) Includes seven forward swap contracts which were terminated in connection with the 2029 Notes issuance.

(2) These includes two $100.0 million treasury rate locks and one $50.0 million forward swap which were terminated in connection with the 2033 Notes issuance.

Schedule of Fair Value of Derivative Instruments

The following table presents the gross fair value amounts of our derivative financial instruments and the associated notional amounts (in millions):

	March 31, 2024						December 31, 2023
Derivatives designated as cash flow hedges	Notional		Fair Value of Assets(1)		Fair Value of Liabilities(2)		Notional		Fair Value of Assets(1)		Fair Value of Liabilities(2)
Interest rate derivatives	$	806.2	$	12.2	$	0.9	$	1,041.5	$	11.7	$	7.7

(1)Included within Other assets, net on the Consolidated Balance Sheets.

(2)Included within Other liabilities on the Consolidated Balance Sheets.

Schedule of Gains on Derivatives

The following table presents the gains / (losses) on derivatives in cash flow hedging relationships recognized in OCI (in millions):

	Three Months Ended
Derivatives designated as cash flow hedges	March 31, 2024		March 31, 2023
Interest rate derivatives	$	8.8	$	(8.6)

The following table presents the amount of gains on derivative instruments reclassified from AOCI into earnings (in millions):

	Financial Statement Classification	Three Months Ended
Derivatives designated as cash flow hedges		March 31, 2024		March 31, 2023
Interest rate derivatives	Interest expense	$	4.9	$	2.3

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Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Values

The table below sets forth our financial assets and liabilities (in millions) that required disclosure of fair value on a recurring basis as of March 31, 2024. The table presents the carrying values and fair values of our financial instruments as of March 31, 2024 and December 31, 2023, that were measured using the valuation techniques described above. The table excludes other financial instruments such as other receivables and accounts payable as the carrying values associated with these instruments approximate their fair value since their maturities are less than one year. These financial instruments are classified as Level 1 in the hierarchy.

	March 31, 2024
			Fair Value
	Carrying Value		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial Assets
Cash, cash equivalents and restricted cash	$	132.5	$	132.5	$	—	$	—	$	132.5
Installment notes receivable on manufactured homes, net	38.3		—		—		38.3		38.3
Notes receivable from real estate developers and operators	127.7		—		—		127.7		127.7
Collateralized receivables, net	56.5		—		—		56.5		56.5
Derivative assets	12.2		—		12.2		—		12.2
Total assets measured at fair value	$	367.2	$	132.5	$	12.2	$	222.5	$	367.2
Financial Liabilities
Mortgage loan payable	$	3,465.5	$	—	$	3,089.3	$	—	$	3,089.3
Secured borrowings on collateralized receivables	56.1		—		—		56.1		56.1
Total secured debt	3,521.6		—		3,089.3		56.1		3,145.4
Unsecured debt
Senior unsecured notes	2,673.7		—		2,440.0		—		2,440.0
Line of credit and other unsecured debt	1,676.7		—		1,676.7		—		1,676.7
Total unsecured debt	4,350.4		—		4,116.7		—		4,116.7
Derivative liabilities	0.9		—		0.9		—		0.9
Other financial liabilities (contingent consideration)	20.2		—		—		20.2		20.2
Total liabilities measured at fair value	$	7,893.1	$	—	$	7,206.9	$	76.3	$	7,283.2

	December 31, 2023
			Fair Value
	Carrying Value		Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Financial Assets
Cash, cash equivalents and restricted cash	$	42.7	$	42.7	$	—	$	—	$	42.7
Installment notes receivable on manufactured homes, net	19.6		—		—		19.6		19.6
Notes receivable from real estate developers and operators	134.5		—		—		134.5		134.5
Collateralized receivables, net	56.2		—		—		56.2		56.2
Derivative assets	11.7		—		11.7		—		11.7
Total assets measured at fair value	$	264.7	$	42.7	$	11.7	$	210.3	$	264.7
Financial Liabilities
Mortgage loan payable	$	3,478.9	$	—	$	3,167.0	$	—	$	3,167.0
Secured borrowings on collateralized receivables	55.8		—		—		55.8		55.8
Total secured debt	3,534.7		—		3,167.0		55.8		3,222.8
Unsecured debt
Senior unsecured notes	2,177.5		—		1,973.2		—		1,973.2
Line of credit and other unsecured debt	2,065.1		—		2,065.1		—		2,065.1
Total unsecured debt	4,242.6		—		4,038.3		—		4,038.3
Derivative liabilities	7.7		—		7.7		—		7.7
Other financial liabilities (contingent consideration)	20.2		—		—		20.2		20.2
Total liabilities measured at fair value	$	7,805.2	$	—	$	7,213.0	$	76.0	$	7,289.0

We had zero marketable securities as of March 31, 2024. The change in the marketable securities balance was as follows (in millions):

	Year Ended
Marketable Securities	December 31, 2023
Beginning Balance	$	127.3
Change in fair value measurement	(16.0)
Foreign currency exchange losses	(7.8)
Dispositions(1)	(103.5)
Ending Balance	$	—

(1)During the year ended December 31, 2023, we sold our 41.8 million share position in Ingenia, generating $102.5 million of proceeds, net of $1.0 million of underwriting and other fees, with a realized loss of $8.0 million. The proceeds were used to pay down amounts drawn under our Senior Credit Facility.

Schedule of Charges in Fair Values

The following tables summarize changes to our financial instruments carried at fair value and classified within Level 3 of the fair value hierarchy for the three months ended March 31, 2024 and 2023 (in millions):

	Three Months Ended
	March 31, 2024									March 31, 2023
Assets	Installment Notes Receivable on MH, net			Notes Receivable From Real Estate Developers and Operators			Collateralized Receivables, net			Installment Notes Receivable on MH, net			Notes Receivable From Real Estate Developers and Operators		Warrants
Level 3 beginning balance at December 31, 2023 and 2022	$	19.6		$	134.5		$	56.2		$	65.9		$	305.2	$	—
Realized gains / (losses)	—		(1)	(0.8)		(1)	1.6		(2)	(1.7)		(1)	—		(0.4)		(3)
Purchases and issuances	19.4			5.0			—			0.1			124.3		0.4
Sales and settlements	(0.7)			(10.9)			(1.3)			(2.1)			(3.0)		—
Foreign currency exchange losses	—			(0.1)			—			—			—		—
Other adjustments	—			—			—			—			8.5		—
Level 3 ending balance at March 31, 2024 and 2023	$	38.3		$	127.7		$	56.5		$	62.2		$	435.0	$	—

(1) Realized losses recorded within Loss on remeasurement of notes receivable on the Consolidated Statements of Operations.

(2) Realized gains recorded within Other income / (expense), net on the Consolidated Statements of Operations.

(3) Realized losses recorded within Income / (loss) from nonconsolidated affiliates within on the Consolidated Statements of Operations.

	Three Months Ended
	March 31, 2024				March 31, 2023
Liabilities	Secured Borrowing on Collateralized Receivables		Contingent Consideration		Contingent Consideration
Level 3 beginning balance December 31, 2023 and 2022	$	55.8	$	20.2	$	20.2
Realized losses(1)	1.6		—		—
Purchases and issuances	—		—		—
Sales and settlements	(1.3)		—		—
Other adjustments	—		—		—
Level 3 ending balance at March 31, 2024 and 2023	$	56.1	$	20.2	$	20.2

(1) Realized losses are recorded within Other income / (expense), net on the Consolidated Statements of Operations.

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Commitment and Contingencies (Tables)

3 Months Ended

Mar. 31, 2024

Commitments and Contingencies Disclosure [Abstract]

Schedule of Estimated Insurance Recoveries

The table below sets forth changes in estimated property insurance recoveries, excluding business interruption recoveries (in millions):

	Three Months Ended March 31, 2024
Total estimated insurance receivable - December 31, 2023	$	56.7
Change in estimated property insurance recoveries	3.0
Proceeds received from insurer	(6.9)
Total estimated insurance receivable - March 31, 2024	$	52.8

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Leases (Tables)

3 Months Ended

Mar. 31, 2024

Leases [Abstract]

Schedule of Future Minimum Operating Lease Payments

Future minimum lease payments under non-cancellable leases as of March 31, 2024 where we are the lessee include (in millions):

Maturity of Lease Liabilities	Finance Leases		Operating Leases		Total
2024 (excluding three months ended March 31, 2024)	$	4.4	$	10.7	$	15.1
2025	0.5		14.0		14.5
2026	0.5		12.5		13.0
2027	0.5		10.5		11.0
2028	0.5		9.8		10.3
Thereafter	21.3		240.4		261.7
Total Lease Payments	$	27.7	$	297.9	$	325.6
Less: Imputed interest	(13.7)		(136.3)		(150.0)
Present Value of Lease Liabilities	$	14.0	$	161.6	$	175.6

Schedule of Future Minimum Finance Lease Payments

Future minimum lease payments under non-cancellable leases as of March 31, 2024 where we are the lessee include (in millions):

Maturity of Lease Liabilities	Finance Leases		Operating Leases		Total
2024 (excluding three months ended March 31, 2024)	$	4.4	$	10.7	$	15.1
2025	0.5		14.0		14.5
2026	0.5		12.5		13.0
2027	0.5		10.5		11.0
2028	0.5		9.8		10.3
Thereafter	21.3		240.4		261.7
Total Lease Payments	$	27.7	$	297.9	$	325.6
Less: Imputed interest	(13.7)		(136.3)		(150.0)
Present Value of Lease Liabilities	$	14.0	$	161.6	$	175.6

The following table presents the future minimum rental payments for this financial liability as of March 31, 2024 (in millions):

Maturity of Financial Liability	March 31, 2024
2024 (excluding three months ended March 31, 2024)	$	10.6
2025	11.9
2026	12.0
2027	12.1
2028	12.0
Thereafter	1,742.9
Total Payments	$	1,801.5
Less: Imputed interest	(1,444.4)
Present Value of Financial Liability	$	357.1

Schedule of Balance Sheet Lease Info

Right-of-use ("ROU") assets and lease liabilities for finance and operating leases as included in our Consolidated Balance Sheets are as follows (in millions):

	Financial Statement Classification	As of
Description		March 31, 2024		December 31, 2023
Lease Assets
Finance lease - ROU asset, net of accumulated amortization	Investment property, net	$	31.7	$	32.6
Operating lease - ROU asset, net	Other assets, net	$	177.4	$	176.0
Below market operating leases, net	Other assets, net	$	93.8	$	95.0
Lease Liabilities
Finance lease liabilities	Other liabilities	$	14.0	$	14.3
Operating lease liabilities	Other liabilities	$	161.6	$	159.5

Lease term, discount rates and additional information for finance and operating leases are as follows:

	As of
	March 31, 2024		December 31, 2023
Lease Term and Discount Rate
Weighted-average Remaining Lease Terms (years)
Finance lease	36.86		36.63
Operating lease	34.17		27.71
Weighted-average Discount Rate
Finance lease	3.60	%	3.59	%
Operating lease	3.78	%	3.82	%

Schedule of Lease Expense

The components of lease costs for finance and operating leases as included in our Consolidated Statements of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Finance Lease Cost
Amortization of ROU assets	Depreciation and amortization	$	0.7	$	0.7
Interest on lease liabilities	Interest expense	0.2		0.2
Operating lease cost	General and administrative expense, Property operating and maintenance, Depreciation and amortization	4.4		4.6
Variable lease cost	Property operating and maintenance	2.0		1.6
Total Lease Cost		$	7.3	$	7.1

The components of lease income for our operating leases, as included in our Consolidated Statement of Operations are as follows (in millions):

		Three Months Ended
Description	Financial Statement Classification	March 31, 2024		March 31, 2023
Operating Leases
Fixed lease income	Income from real property; Brokerage commissions and other revenue, net	$	8.7	$	7.9
Variable lease income(1)	Income from real property; Brokerage commissions and other revenue, net	$	3.4	$	1.5

(1)Consists of rent primarily based on a percentage of operating revenues beyond target thresholds.

Schedule of Lease Terms

	Three Months Ended
	March 31, 2024		March 31, 2023
Other Information (in millions)
Cash Paid for Amounts Included in the Measurement of Lease Liabilities
Operating cash outflows for operating leases	$	3.0	$	3.3
Financing cash outflows for finance leases	0.2		5.9
Total Cash Paid on Lease Liabilities	$	3.2	$	9.2

Schedule of Future Minimum Lease Receivables

At our RV communities and marinas, future minimum lease payments under non-cancellable leases with real estate operators where we are the lessor include the following as of March 31, 2024 (in millions):

Maturity of Lease Payments	Operating Leases
2024 (excluding the three months ended March 31, 2024)	$	18.7
2025	18.1
2026	13.1
2027	8.8
2028	7.8
Thereafter	81.5
Total Undiscounted Cash Flows	$	148.0

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Subsequent Events (Tables)

3 Months Ended

Mar. 31, 2024

Subsequent Events [Abstract]

Schedule of Subsequent Events

Subsequent to the three months ended March 31, 2024, we acquired the following properties:

Property Name	Property Type	Sites, Wet Slips and Dry Storage Spaces	Development Sites	State, Province or Country	Total Purchase Price (in millions)
Port Milford(1)	Marina	92	—	CT	$	4.0
Oak Leaf	Marina	89	—	CT	5.0
Berth One Palm Beach	Marina	4	—	FL	3.0
Total Subsequent Acquisitions		185	—		$	12.0

(1)In conjunction with the acquisition, we issued 19,326 common OP units valued at $2.5 million.

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Basis of Presentation Basis of Presentation (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) segement	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) segement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill	$ 731.4		$ 733.0
Goodwill impairment (see Note 6)	$ 0.0	$ 15.4	$ 369.9
Number of Operating Segments | segement	4		3
Revision of Prior Period, Error Correction, Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Goodwill impairment (see Note 6)		$ 15.4

XML

Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Fixed lease income	$ 476.9	$ 441.6
Home sales	68.9	86.3
Service, retail, dining and entertainment	117.9	102.4
Interest	4.6	11.4
Brokerage commissions and other, net	3.0	9.5
Total Revenues	671.3	651.2
MH
Disaggregation of Revenue [Line Items]
Fixed lease income	238.0	224.0
Home sales	27.3	40.8
Service, retail, dining and entertainment	2.6	2.6
Interest	3.1	10.3
Brokerage commissions and other, net	1.0	3.8
Total Revenues	272.0	281.5
RV
Disaggregation of Revenue [Line Items]
Fixed lease income	104.5	99.6
Home sales	5.5	6.4
Service, retail, dining and entertainment	6.5	5.8
Interest	1.4	0.9
Brokerage commissions and other, net	0.7	4.7
Total Revenues	118.6	117.4
Marinas
Disaggregation of Revenue [Line Items]
Fixed lease income	96.4	89.1
Home sales	0.0	0.0
Service, retail, dining and entertainment	104.5	91.1
Interest	0.1	0.2
Brokerage commissions and other, net	1.0	0.9
Total Revenues	202.0	181.3
UK Segment
Disaggregation of Revenue [Line Items]
Fixed lease income	38.0	28.9
Home sales	36.1	39.1
Service, retail, dining and entertainment	4.3	2.9
Interest	0.0	0.0
Brokerage commissions and other, net	0.3	0.1
Total Revenues	$ 78.7	$ 71.0

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Real Estate Acquisitions and Dispositions - Schedule of Business Acquisitions, by Acquisition (Details)	Dec. 31, 2023 developmentSite site
Business Acquisition [Line Items]
Sites, Wet Slips and Dry Storage Spaces | site	92
Development Sites | developmentSite	72
Fox Run
Business Acquisition [Line Items]
Sites, Wet Slips and Dry Storage Spaces | site	68
Development Sites | developmentSite	72
Savannah Yacht Center
Business Acquisition [Line Items]
Sites, Wet Slips and Dry Storage Spaces | site	24
Development Sites | developmentSite	0

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Real Estate Acquisitions and Dispositions - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended	12 Months Ended
	Jan. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023	Dec. 31, 2023
Business Acquisition [Line Items]
Investment in property					$ 107.4
Inventory of manufactured homes, boat parts and retail related items					0.1
In-place leases, goodwill and other intangible assets					0.4
Other assets / (liabilities), net					(4.2)
Total identifiable assets acquired net of liabilities assumed					112.1
Cash and escrow				$ 7.1
Temporary and permanent equity				105.0
Total consideration				112.1
Issuance of common stock and common OP units, net		$ 0.3	$ 4.4
Fox Run
Business Acquisition [Line Items]
Investment in property					7.2
Inventory of manufactured homes, boat parts and retail related items					0.0
In-place leases, goodwill and other intangible assets					0.0
Other assets / (liabilities), net					0.0
Total identifiable assets acquired net of liabilities assumed					7.2
Cash and escrow				2.8
Temporary and permanent equity				4.4
Total consideration				7.2
Fox Run | Common OP units
Business Acquisition [Line Items]
Issuance of stock and units (in shares)	31,289
Issuance of common stock and common OP units, net	$ 4.4				4.4
Savannah Yacht Center
Business Acquisition [Line Items]
Investment in property					100.2
Inventory of manufactured homes, boat parts and retail related items					0.1
In-place leases, goodwill and other intangible assets					0.4
Other assets / (liabilities), net					4.2
Total identifiable assets acquired net of liabilities assumed					104.9
Cash and escrow				4.3
Temporary and permanent equity				100.6
Total consideration				$ 104.9
Savannah Yacht Center | Series K preferred OP units
Business Acquisition [Line Items]
Issuance of common stock and common OP units, net					$ 100.6

XML

Real Estate Acquisitions and Dispositions - Narrative (Details)		1 Months Ended				3 Months Ended			6 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($) site	Dec. 31, 2023 USD ($) developmentSite site	Aug. 31, 2023 USD ($) developmentSite	Feb. 28, 2023 USD ($) property Rate	Jan. 31, 2023 USD ($) shares	Mar. 31, 2024 USD ($) developmentSite lease shares	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) landParcel property site developmentSite
Business Acquisition [Line Items]
Number of ground leases entered into | lease						1
Number of wet slips and dry storage spaces leased | developmentSite						8
Capitalized transaction costs	$ 3,100,000	$ 3,100,000								$ 3,100,000
Business combinations						$ 0		$ 2,800,000
Aggregate purchase price										$ 35,800,000
Gain / (loss) on dispositions of properties						(5,400,000)		1,600,000
Sites, Wet Slips and Dry Storage Spaces | site	92	92								92
Asset impairments						20,700,000		2,400,000
Number of Properties Reacquired | property										2
Real Estate Reacquired, Gain (Loss)										$ 0
Issuance of common stock and common OP units, net						$ 300,000		$ 4,400,000
Intangible Assets, Transfers										1,300,000
Other Liabilities, Transfers From Held-For-Sale										$ 55,800,000
Wholly Owned Properties
Business Acquisition [Line Items]
Property, Plant and Equipment, Transfers and Changes	$ 259,000,000
Residential Real Estate
Business Acquisition [Line Items]
Property, Plant and Equipment, Transfers and Changes	$ 4,600,000
Marinas
Business Acquisition [Line Items]
Number Of Buildings Acquired | developmentSite						2
Payments to Acquire Buildings						$ 13,700,000
Cabrillo Isle and Emerald Coast
Business Acquisition [Line Items]
Business combinations									$ 3,000,000
Sun NG Results Transaction
Business Acquisition [Line Items]
Number of land parcels acquired | landParcel										4
Fox Run
Business Acquisition [Line Items]
Sites, Wet Slips and Dry Storage Spaces | site	68	68								68
Fox Run | Common OP units
Business Acquisition [Line Items]
Issuance of common stock and common OP units, net					$ 4,400,000					$ 4,400,000
Issuance of stock and units (in shares) | shares					31,289
Savannah Yacht Center
Business Acquisition [Line Items]
Sites, Wet Slips and Dry Storage Spaces | site	24	24								24
Savannah Yacht Center | Series K preferred OP units
Business Acquisition [Line Items]
Issuance of common stock and common OP units, net										$ 100,600,000
Petosky | Common OP units
Business Acquisition [Line Items]
Issuance of common stock and common OP units, net						$ 600,000
Issuance of stock and units (in shares) | shares						4,452
UK Non-Operating Properties | Notes receivable from real estate developers and operators
Business Acquisition [Line Items]
Weighted average interest rate | Rate				11.90%
Spanish Trails MHC
Business Acquisition [Line Items]
Gain / (loss) on dispositions of properties						$ (6,200,000)
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | UK Non-Operating Properties
Business Acquisition [Line Items]
Number of communities sold | property				2
Consideration received				$ 111,500,000
Note receivable				$ 108,800,000
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | UK Non-Operating Properties | Gain / (loss) on disposition of properties
Business Acquisition [Line Items]
Release of foreign currency translation losses										$ 11,900,000
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | MH Operating Community
Business Acquisition [Line Items]
Number of communities sold | developmentSite			1
Number of sites sold | developmentSite			155
Assets held for sale							$ 6,800,000		6,800,000
Proceeds related to disposition of properties			$ 6,800,000
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | MH Operating Community | Other Assets
Business Acquisition [Line Items]
Assets held for sale							13,100,000		$ 13,100,000
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | MH Operating Community | Asset Impairments
Business Acquisition [Line Items]
Asset impairments							$ 6,300,000
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | UK MH Operating Community
Business Acquisition [Line Items]
Number of sites sold | developmentSite										730
Depreciation Expense on Reclassified Assets										$ 1,300,000
Disposal Group, Held-for-Sale or Disposed of by Sale, Not Discontinued Operations | Sun NG RV Resorts
Business Acquisition [Line Items]
Number of communities sold | developmentSite		3
Number of sites sold | developmentSite		955
Disposal Group, Held-for-Sale, Not Discontinued Operations | UK Non-Operating Properties | Gain / (loss) on disposition of properties
Business Acquisition [Line Items]
Gain / (loss) on dispositions of properties										$ (2,200,000)
Disposal Group, Held-for-Sale, Not Discontinued Operations | MH Operating Community
Business Acquisition [Line Items]
Number of communities sold | developmentSite						2
Number of sites sold | developmentSite						533
Proceeds related to disposition of properties						$ 51,700,000
UNITED STATES
Business Acquisition [Line Items]
Number of land parcels acquired						2				4
Aggregate purchase price						$ 12,900,000
UNITED KINGDOM
Business Acquisition [Line Items]
Number of land parcels acquired | landParcel										1

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Notes and Other Receivables - Schedule of Notes and Other Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Notes and Other Receivables, net	$ 469.1	$ 421.6
Other receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	303.1	267.5
Total Notes and Other Receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	469.1	421.6
Secured Installment Notes Receivable on Manufactured Homes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	38.3	19.6
Notes receivable from real estate developers and operators
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	127.7	134.5
Notes Due From Royale Holdings | UNITED KINGDOM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment		10.8
Notes Due From Other Real Estate Developers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	$ 127.7	$ 123.7

XML

Notes And Other Receivables - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($) developmentSite realEstateAsset	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) Rate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Notes and Other Receivables, net	$ 469,100,000		$ 421,600,000
Undrawn funds	38,300,000
Gain / (loss) on dispositions of properties	(700,000)	$ (1,700,000)
Installment notes receivable on manufactured homes, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross installment notes receivable			20,400,000
Installment notes receivable on manufactured homes, net | Fair Value, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, fair value adjustment	(1,300,000)		(2,900,000)
Notes receivable from real estate developers and operators
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	127,700,000		$ 134,500,000
Secured Installment Notes Receivable on Manufactured Homes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross installment notes receivable	$ 39,100,000
Weighted average interest rate	6.60%		6.90%
Maturity	18 years 2 months 12 days		17 years 2 months 12 days
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	$ 38,300,000		$ 19,600,000
Secured Installment Notes Receivable on Manufactured Homes | Fair Value, Recurring
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, fair value adjustment	(800,000)		800,000
Notes Due From Other Real Estate Developers
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, fair value adjustment	$ 0		$ 0
Weighted average interest rate	9.30%		9.20%
Maturity	2 years 7 months 6 days		2 years 7 months 6 days
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	$ 127,700,000		$ 123,700,000
Notes Due From Royale Holdings | UNITED KINGDOM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, fair value adjustment			$ 103,500,000
Weighted average interest rate | Rate			12.50%
Proceeds from Sale of Notes Receivable	7,000,000
Proceeds from Sale of Notes Receivable, Gross of Fees	10,700,000
Gain / (loss) on dispositions of properties	800,000
Financing Receivable, before Allowance for Credit Loss			$ 114,300,000
Financing Receivable, Accrued Interest, before Allowance for Credit Loss			10,400,000
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment			$ 10,800,000
Notes Due From Royale Holdings | Royale Holdings Group HoldCo Limited
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss, Net Of Fair Value Adjustment	$ 0
Notes Due From Royale Holdings | Royale Holdings Group HoldCo Limited | UNITED KINGDOM
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of MH Manufacturers Securing Note	3		3
Real Estate Reacquired, Note Receivable Settlement, Value			$ 263,800,000
Number of Real Estate Assets Securing Note | realEstateAsset	3

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Notes and Other Receivables - Schedule of Other Receivables (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
MH and annual RV residents for rent, utility charges, fees and other pass-through charges, net	$ 83.2	$ 65.9
Insurance receivables	65.2	77.8
Marina customers for storage, service and lease payments, net	52.8	46.8
Other Receivables, Other	47.1	48.8
Home sale proceeds	54.8	28.2
Other receivables	303.1	267.5
Total Notes and Other Receivables, net	469.1	421.6
Allowance for rent, water, sewer usage receivables	5.0	4.8
Marinas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for rent, water, sewer usage receivables	$ 3.1	$ 2.9

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Collateralized Receivables and Transfers of Financial Assets, Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Net cash proceeds received			$ 53.4
Receivable for future cash payment			1.1
Collateralized receivables	$ 56.5		56.2
Gross collateralized receivable			59.1
Secured borrowings on collateralized receivables	56.1		55.8
Gross secured borrowings	52.6		53.9
Secured borrowings, fair value adjustment	$ 3.5		$ 1.9
Weighted Average Interest Rates	4.207%		4.234%
Weighted Average Years to Maturity	6 years 9 months 18 days		6 years 9 months 18 days
Collateralized Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Years to Maturity	13 years 10 months 24 days	14 years 2 months 12 days	14 years 2 months 12 days
Installment notes receivable on manufactured homes, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Collateralized receivables	$ 56.5
Gross collateralized receivable	57.8
Collateralized Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income and expense, net	1.2
Fair Value, Recurring | Installment notes receivable on manufactured homes, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, fair value adjustment	$ (1.3)		$ (2.9)
Secured Borrowings
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Interest Rates	8.559%		8.556%

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Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 733.0
Currency Translation Adjustment	(1.6)
Goodwill, ending balance	731.4		$ 733.0
Accumulated impairment losses as of March 31, 2024(2)	369.9
Goodwill impairment (see Note 6)	0.0	$ 15.4	369.9
MH
Goodwill [Roll Forward]
Goodwill, beginning balance	0.0
Currency Translation Adjustment	0.0
Goodwill, ending balance	0.0		0.0
Accumulated impairment losses as of March 31, 2024(2)	0.0
RV
Goodwill [Roll Forward]
Goodwill, beginning balance	9.5
Currency Translation Adjustment	0.0
Goodwill, ending balance	9.5		9.5
Accumulated impairment losses as of March 31, 2024(2)	0.0
Marinas
Goodwill [Roll Forward]
Goodwill, beginning balance	541.5
Currency Translation Adjustment	0.0
Goodwill, ending balance	541.5		541.5
Accumulated impairment losses as of March 31, 2024(2)	0.0
UK Segment
Goodwill [Roll Forward]
Goodwill, beginning balance	182.0
Currency Translation Adjustment	(1.6)
Goodwill, ending balance	180.4		$ 182.0
Accumulated impairment losses as of March 31, 2024(2)	$ (369.9)

XML

Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 441.2	$ 441.8
Accumulated Amortization	(223.5)	(216.3)
Total indefinite-lived assets	144.0	144.0
Total	585.2	585.8
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Total indefinite-lived assets	141.0	141.0
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Total indefinite-lived assets	3.0	3.0
In-place leases
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	166.1	166.0
Accumulated Amortization	$ (147.5)	(146.2)
In-place leases | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	2 months
In-place leases | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	13 years
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years
Gross Carrying Amount	$ 10.5	10.5
Accumulated Amortization	(6.7)	(6.2)
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	84.6	85.3
Accumulated Amortization	$ (13.7)	(12.3)
Trademarks and trade names | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	3 years
Trademarks and trade names | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	15 years
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 131.6	131.6
Accumulated Amortization	$ (40.5)	(37.3)
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	4 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	17 years
Franchise agreements and other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 48.4	48.4
Accumulated Amortization	$ (15.1)	$ (14.3)
Franchise agreements and other intangible assets | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	1 year
Franchise agreements and other intangible assets | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	27 years

XML

Goodwill and Other Intangible Assets - Schedule of Intangible Asset Amortization Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Other Intangible Asset Amortization Expense	$ 7.7	$ 9.7
In-place leases
Finite-Lived Intangible Assets [Line Items]
Other Intangible Asset Amortization Expense	1.9	3.6
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Other Intangible Asset Amortization Expense	0.5	0.5
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Other Intangible Asset Amortization Expense	1.4	1.5
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Other Intangible Asset Amortization Expense	3.2	3.2
Franchise agreements and other intangible assets
Finite-Lived Intangible Assets [Line Items]
Other Intangible Asset Amortization Expense	$ 0.7	$ 0.9

XML

Goodwill and Other Intangible Assets- Intangibles Future Amortization Expense (Details) $ in Millions	Mar. 31, 2024 USD ($)
Finite-Lived Intangible Assets [Line Items]
Remainder 2024	$ 22.8
2025	29.6
2026	24.7
2027	22.4
2028	20.8
In-place leases
Finite-Lived Intangible Assets [Line Items]
Remainder 2024	5.1
2025	6.1
2026	3.9
2027	2.3
2028	0.9
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Remainder 2024	1.6
2025	2.1
2026	0.1
2027	0.0
2028	0.0
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Remainder 2024	4.3
2025	5.7
2026	5.7
2027	5.4
2028	5.3
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Remainder 2024	9.5
2025	12.7
2026	12.3
2027	12.2
2028	12.1
Franchise agreements and other intangible assets
Finite-Lived Intangible Assets [Line Items]
Remainder 2024	2.3
2025	3.0
2026	2.7
2027	2.5
2028	$ 2.5

XML

Investment in Nonconsolidated Affiliates - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investment	$ 122.4	$ 118.9
Sungenia JV
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%	50.00%
Investment	$ 60.6	$ 56.8	$ 44.5
GTSC
Schedule of Equity Method Investments [Line Items]
Ownership interest	40.00%	40.00%
Investment	$ 60.3	$ 60.4	$ 54.5
SV Lift
Schedule of Equity Method Investments [Line Items]
Ownership interest	50.00%	50.00%
Investment	$ 1.5	$ 1.7

XML

Investment in Nonconsolidated Affiliates - Schedule of Nonconsolidated Affiliate (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Schedule of Equity Method Investments [Line Items]
Investment	$ 122.4		$ 118.9
Total Income / (Loss) from Nonconsolidated Affiliates	1.4	$ (0.2)
Sungenia JV
Schedule of Equity Method Investments [Line Items]
Investment	60.6		56.8	$ 44.5
Total Income / (Loss) from Nonconsolidated Affiliates	0.9	0.6	3.2
Cumulative translation adjustment	(1.0)		(0.5)
Contributions	3.9		9.6
GTSC
Schedule of Equity Method Investments [Line Items]
Investment	60.3		60.4	$ 54.5
Total Income / (Loss) from Nonconsolidated Affiliates	0.9	1.0	3.3
Contributions	0.2		27.5
Distributions	(6.4)		(20.7)
Fair value adjustment	5.2		(4.2)
SV Lift
Schedule of Equity Method Investments [Line Items]
Investment	1.5		$ 1.7
Total Income / (Loss) from Nonconsolidated Affiliates	(0.4)	(0.3)
RezPlot
Schedule of Equity Method Investments [Line Items]
Total Income / (Loss) from Nonconsolidated Affiliates	$ 0.0	$ (1.5)

XML

Consolidated Variable Interest Entities - Schedule of Variable Interest Entities (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2024	Jun. 30, 2022	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Assets
Investment property, net	$ 14,457.9		$ 14,443.6
Cash, cash equivalents and restricted cash	132.5		42.7	$ 74.8	$ 90.4
Other assets, net	713.2		668.5
Total Assets	17,113.3		16,940.7
Liabilities and Other Equity
Secured debt	3,521.6		3,534.7
Advanced reservation deposits and rent	480.4		344.5
Accrued expenses and accounts payable	370.4		313.7
Other liabilities	987.5		953.1
Total Liabilities	9,830.0		9,506.8
Land improvements and buildings	$ 11,529.5		11,682.2
Assets related to VIEs, percentage	0.80%
Variable Interest Entity, Primary Beneficiary
Assets
Investment property, net	$ 136.4		132.3
Cash, cash equivalents and restricted cash	3.5		2.9
Other intangible assets, net	0.1		0.1
Other assets, net	0.4		0.4
Total Assets	140.4		135.7
Liabilities and Other Equity
Secured debt	3.2		3.2
Advanced reservation deposits and rent	0.9		0.4
Accrued expenses and accounts payable	24.0		24.1
Total Liabilities	28.1		27.7
Temporary equity	10.9		10.7
Total Liabilities and Other Equity	$ 39.0		$ 38.4
Sun NG Cisco Grove RV LLC
Liabilities and Other Equity
Ownership percentage	94.80%
Sun NG Cisco Grove RV LLC | Third-Party
Liabilities and Other Equity
Ownership percentage	5.20%
Sun NG Kittatinny RV LLC
Liabilities and Other Equity
Ownership percentage	95.90%
Sun NG Kittatinny RV LLC | Third-Party
Liabilities and Other Equity
Ownership percentage	4.10%
Sun NG River Beach LLC
Liabilities and Other Equity
Ownership percentage	95.90%
Sun NG River Beach LLC | Third-Party
Liabilities and Other Equity
Ownership percentage	4.10%
Sun NG Coyote Ranch RV LLC
Liabilities and Other Equity
Ownership percentage	96.00%
Sun NG Coyote Ranch RV LLC | Third-Party
Liabilities and Other Equity
Ownership percentage	4.00%
Sun NG Beaver Brook RV LLC
Liabilities and Other Equity
Ownership percentage	98.40%	70.00%
Sun NG Beaver Brook RV LLC | Third-Party
Liabilities and Other Equity
Ownership percentage	1.60%	30.00%

XML

Consolidated Variable Interest Entities - Narrative (Details)	Mar. 31, 2024 Rate	Dec. 31, 2023
Disclosure of Variable Interest Entities [Abstract]
Assets related to VIEs, percentage	0.80%
Liabilities related to VIEs, percentage	0.30%
Equity interests and noncontrolling interests related to VIEs, percentage	1.00%	1.00%

XML

Debt and Line of Credit - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Debt Instrument [Line Items]
Secured debt	$ 3,521,600		$ 3,534,700
Senior unsecured notes	$ 2,673,700		$ 2,177,500
Weighted Average Years to Maturity	6 years 9 months 18 days		6 years 9 months 18 days
Weighted Average Interest Rates	4.207%		4.234%
Loans Payable	$ 3,465,500		$ 3,478,900
Secured borrowings on collateralized receivables (See Note 5)	56,100		55,800
Unsecured Debt And Other	4,350,400		4,242,600
Debt And Other	7,872,000		7,777,300
Transfers Accounted for as Secured Borrowings, Associated Liabilities, Fair Value Adjustment	$ 3,500		$ 1,900
Revolving Credit Facility
Debt Instrument [Line Items]
Weighted Average Years to Maturity	2 years		1 year 8 months 12 days
Weighted Average Interest Rates	5.186%		5.428%
Line of credit and other	$ 1,676,700		$ 2,065,100
Debt Issuance Costs, Line of Credit Arrangements, Net	$ 0		$ 1,600
Collateralized Receivables
Debt Instrument [Line Items]
Weighted Average Years to Maturity	13 years 10 months 24 days	14 years 2 months 12 days	14 years 2 months 12 days
Senior Unsecured Notes
Debt Instrument [Line Items]
Weighted Average Years to Maturity	6 years 9 months 18 days		7 years 6 months
Weighted Average Interest Rates	3.778%		3.375%
Net debt discount (premium)	$ 6,900		$ 6,500
Deferred financing costs	$ (19,400)		$ (16,000)
Loans Payable
Debt Instrument [Line Items]
Weighted Average Years to Maturity	8 years 10 months 24 days		9 years 2 months 12 days
Weighted Average Interest Rates	3.995%		3.994%
Net debt discount (premium)	$ 0		$ 0
Deferred financing costs	$ (16,200)		$ (16,900)
Secured Borrowings
Debt Instrument [Line Items]
Weighted Average Interest Rates	8.559%		8.556%

XML

Debt and Line of Credit - Schedule of Secured Debt (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($) encumberedProperty	Dec. 31, 2023 USD ($) encumberedProperty
Debt Instrument [Line Items]
Repayment Amount | $	$ 1.2	$ 0.0
Loss on Extinguishment of Debt | $	(0.6)	$ 0.0
Loans Payable | April 1, 2030 - April 1, 2033
Debt Instrument [Line Items]
Number of Encumbered Properties | encumberedProperty		22
Loans Payable | February 13, 2026
Debt Instrument [Line Items]
Number of Encumbered Properties | encumberedProperty		5
Loans Payable | November 1, 2030
Debt Instrument [Line Items]
Number of Encumbered Properties | encumberedProperty			2
Secured Debt
Debt Instrument [Line Items]
Repayment Amount | $	$ 0.0		$ 0.0

XML

Debt and Line of Credit - Schedule of Mortgage Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Mar. 31, 2024
Debt Instrument [Line Items]
Loan Amount	$ 3,478,900			$ 3,465,500
Loans Payable	3,478,900			3,465,500
Secured debt	$ 3,534,700			3,521,600
Secured Debt | February 13, 2026
Debt Instrument [Line Items]
Term (in years)		3 years
Loans Payable			$ 85,000
Secured Debt | April 1, 2030 - April 1, 2033
Debt Instrument [Line Items]
Loans Payable			$ 99,100
Secured Debt | November 1, 2030
Debt Instrument [Line Items]
Term (in years)	7 years
Loans Payable	$ 252,800
Secured Debt | Minimum | April 1, 2030 - April 1, 2033
Debt Instrument [Line Items]
Term (in years)			7 years
Secured Debt | Maximum | April 1, 2030 - April 1, 2033
Debt Instrument [Line Items]
Term (in years)			10 years
Collateralized Mortgage Backed Securities
Debt Instrument [Line Items]
Pledged Assets, Real Estate, Not Separately Reported				$ 2,700,000
Loans Payable | Secured Debt | February 13, 2026
Debt Instrument [Line Items]
Interest Rate			5.00%
Loans Payable | Secured Debt | April 1, 2030 - April 1, 2033
Debt Instrument [Line Items]
Interest Rate			5.72%
Loans Payable | Secured Debt | November 1, 2030
Debt Instrument [Line Items]
Interest Rate	6.49%

XML

Debt and Line of Credit- Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended	15 Months Ended
	Oct. 31, 2019 USD ($) Rate	Mar. 31, 2024 USD ($) site property Rate	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) site	Mar. 31, 2024 USD ($) site property	Apr. 07, 2022 USD ($) option
Debt Instrument [Line Items]
Loan Amount		$ 3,465.5		$ 3,478.9	$ 3,465.5
Sites, Wet Slips and Dry Storage Spaces | site				92
Termination of term loan		14.2	$ 19.8
Loss on extinguishment of debt		0.6	0.0
Average closing price of units (in dollars per share)		7.6	11.0
Conversion of OP units		0.5	7.3
Reduction in secured borrowing balance		1.2	$ 0.0
Revolving Credit Facility
Debt Instrument [Line Items]
Termination of term loan		1,100.0
Line of credit and other		1,676.7		$ 2,065.1	1,676.7
Long-term debt		0.0		1,100.0	0.0
Unsecured Term Loan Facility
Debt Instrument [Line Items]
Long-term debt		3.9		7.8	3.9
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit, borrowing capacity						$ 4,200.0
Line of credit, additional borrowing capacity						$ 800.0
Line of Credit, Number of Options to Extend Maturity Date | option						2
Revolving Loan | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit and other		$ 1,700.0		$ 944.1	1,700.0
Revolving Loan | Revolving Credit Facility
Debt Instrument [Line Items]
Current borrowing capacity						$ 3,050.0
Line of Credit, Extended Maturity Date Period						6 months
Term Loan | Revolving Credit Facility
Debt Instrument [Line Items]
Basis points | Rate		0.85%
Line of credit and other	$ 58.0
Term (in years)	4 years
Term Loan | Revolving Credit Facility | Minimum
Debt Instrument [Line Items]
Basis points				0.725%
Term Loan | Revolving Credit Facility | Maximum
Debt Instrument [Line Items]
Basis points				1.60%
Term Loan | Revolving Credit Facility
Debt Instrument [Line Items]
Current borrowing capacity						$ 1,150.0
Line of Credit and Other Debt
Debt Instrument [Line Items]
Outstanding letters of credit		$ 11.2		$ 26.2	$ 11.2
Line of Credit and Other Debt | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit variable interest rate		0.95%			0.95%
Line of Credit and Other Debt | Term Loan | Minimum
Debt Instrument [Line Items]
Basis points					0.80%
Fixed Interest Rate | Rate	1.20%
Fixed Interest Rate | Rate	1.20%
Line of Credit and Other Debt | Term Loan | Maximum
Debt Instrument [Line Items]
Basis points					1.60%
Fixed Interest Rate | Rate	2.05%
Fixed Interest Rate | Rate	2.05%
Secured Debt
Debt Instrument [Line Items]
Reduction in secured borrowing balance		$ 0.0		$ 0.0
Properties Securing Debt | Collateralized Mortgage Backed Securities
Debt Instrument [Line Items]
Number of properties jointly secured | property		156			156
Sites, Wet Slips and Dry Storage Spaces | site		62,848			62,848

XML

Debt and Line of Credit - Schedule of Unsecured Debt (Details) - USD ($) $ in Millions	1 Months Ended
	Jan. 31, 2024	Mar. 31, 2024	Jan. 11, 2024	Dec. 31, 2023	Jan. 31, 2023	Apr. 15, 2022	Oct. 05, 2021	Jun. 28, 2021	Oct. 31, 2019
Debt Instrument [Line Items]
Unsecured debt		$ 4,350.4		$ 4,242.6
Senior Unsecured Notes - January 2033 Maturity
Debt Instrument [Line Items]
Interest Rate					5.70%
Principal Amount					$ 400.0
Unsecured debt		395.8		395.7
Senior Unsecured Notes - April 2032 Maturity
Debt Instrument [Line Items]
Interest Rate						4.20%
Principal Amount						$ 600.0
Unsecured debt		592.7		592.6
Senior Unsecured Notes - November 2028 Maturity
Debt Instrument [Line Items]
Interest Rate							2.30%
Principal Amount							$ 450.0
Unsecured debt		447.0		446.8
Senior Unsecured Notes - July 2031 Maturity - First Tranche
Debt Instrument [Line Items]
Interest Rate								2.70%
Principal Amount								$ 750.0
Unsecured debt		742.6		742.4
Senior Unsecured Notes
Debt Instrument [Line Items]
Principal Amount		2,700.0
Unsecured debt		2,673.7		2,177.5
Senior Unsecured Notes - January 2029 Maturity
Debt Instrument [Line Items]
Interest Rate			5.50%
Principal Amount			$ 500.0
Unsecured debt		$ 495.6		$ 0.0
Term			5 years
Net proceeds from offering	$ 495.4
Line of Credit and Other Debt | Minimum | Term Loan
Debt Instrument [Line Items]
Fixed Interest Rate									1.20%
Fixed Interest Rate									1.20%

XML

Debt and Line of Credit - Schedule of Interest Capitalized (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Debt Disclosure [Abstract]
Interest capitalized	$ 2.7	$ 2.5

XML

Equity and Temporary Equity - Schedule of Redeemable Preferred Units (Details) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Class of Stock [Line Items]
Redeemable preferred stock	$ 259.7	$ 260.9	$ 298.8	$ 202.9
Issue price (in dollars per share) | $ / shares	$ 100.00
Series D preferred OP units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	488,958
Exchange rate	0.8000
Annual distribution rate	0.040
Redeemable preferred stock	$ 47.3	46.9
Series F preferred OP units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	90,000
Exchange rate	0.6250
Annual distribution rate	0.030
Redeemable preferred stock	$ 8.5	8.5
Series G preferred OP units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	205,812
Exchange rate	0.6452
Annual distribution rate	0.032
Redeemable preferred stock	$ 19.8	20.4
Series H preferred OP units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	581,229
Exchange rate	0.6098
Annual distribution rate	0.030
Redeemable preferred stock	$ 54.9	55.0
Series J preferred OP units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	238,000
Exchange rate	0.6061
Annual distribution rate	0.0285
Redeemable preferred stock	$ 22.6	22.7
Series K preferred OP units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	1,000,000
Exchange rate	0.5882
Annual distribution rate	0.040
Redeemable preferred stock	$ 95.7	96.7
Redeemable Preferred OP Units
Class of Stock [Line Items]
OP units outstanding (in shares) | shares	2,603,999
Redeemable preferred stock	$ 248.8	$ 250.2

XML

Equity and Temporary Equity - Schedule of Redeemable Equity Units (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Class of Stock [Line Items]
Redeemable preferred stock	$ 259.7	$ 260.9	$ 298.8	$ 202.9
Total
Class of Stock [Line Items]
Redeemable preferred stock	10.9	10.7
Solar Energy Project LLC
Class of Stock [Line Items]
Redeemable preferred stock	2.3	2.3
Solar Energy Project CA II LLC
Class of Stock [Line Items]
Redeemable preferred stock	5.2	5.1
Solar Energy Project III LLC
Class of Stock [Line Items]
Redeemable preferred stock	2.4	2.3
Other Stand-Alone Joint Ventures
Class of Stock [Line Items]
Redeemable preferred stock	$ 1.0	$ 1.0

XML

Equity and Temporary Equity - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended
	Dec. 31, 2021 USD ($)	Mar. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	May 16, 2023 shares
Class of Stock [Line Items]
Shares availability for issuance (in shares)				380,000,000
Common stock authorized (in shares)		360,000,000.0	360,000,000.0	360,000,000
Common stock outstanding (in shares)		124,641,861	124,400,000
Preferred stock outstanding (in shares)		0
Aggregate gross sales price | $	$ 1,250.0
Percentage of gross price per share of shares sold	2.00%
Common and preferred OP units | $		$ 84.9	$ 90.2
OP Units Outstanding		3,321,482
Preferred Stock, Shares Issued		0
Preferred Stock
Class of Stock [Line Items]
Preferred stock available for issuance (in shares)				20,000,000
Common OP units | Common OP units
Class of Stock [Line Items]
Common and preferred OP units | $		$ 42.8	46.5
OP Units Outstanding		2,683,654
Conversion Of Stock, Exchange Rate		1.0000
Series E preferred OP units | Preferred Stock
Class of Stock [Line Items]
Common and preferred OP units | $		$ 6.3	6.4
OP Units Outstanding		80,000
Conversion Of Stock, Exchange Rate		0.6897
Annual distribution rate		5.50%
Series L Preferred OP Units | Preferred Stock
Class of Stock [Line Items]
Common and preferred OP units | $		$ 2.0	$ 2.0
OP Units Outstanding		20,000
Conversion Of Stock, Exchange Rate		0.6250
Annual distribution rate		3.50%
December 2021 Sales Agreement
Class of Stock [Line Items]
Value of Shares Sold in Forward Sale Transactions | $		$ 160.6

XML

Equity and Temporary Equity - Schedule of Issuances (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2024	Jan. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023	Dec. 31, 2023
Dividends Payable [Line Items]
Value at Issuance (in millions)			$ 0.3	$ 4.4
Temporary and permanent equity					$ 105.0
Investment	$ 122.4		$ 122.4			$ 118.9
OP Units Outstanding	3,321,482		3,321,482
Common and preferred OP units	$ 84.9		$ 84.9			90.2
Preferred OP Units, Issuance Price			$ 100.00
Common OP units | Common OP units
Dividends Payable [Line Items]
OP Units Outstanding	2,683,654		2,683,654
Common and preferred OP units	$ 42.8		$ 42.8			46.5
Preferred Stock | Series A-1 preferred OP units
Dividends Payable [Line Items]
OP Units Outstanding	191,812		191,812
Annual distribution rate			6.00%
Common and preferred OP units	$ 10.5		$ 10.5			11.5
Preferred Stock | A-3 preferred OP units
Dividends Payable [Line Items]
OP Units Outstanding	40,268		40,268
Annual distribution rate			4.50%
Common and preferred OP units	$ 2.4		$ 2.4			2.4
Preferred Stock | Series C preferred OP units
Dividends Payable [Line Items]
OP Units Outstanding	305,748		305,748
Annual distribution rate			5.00%
Common and preferred OP units	$ 20.9		$ 20.9			21.4
Preferred Stock | Series E preferred OP units
Dividends Payable [Line Items]
OP Units Outstanding	80,000		80,000
Annual distribution rate			5.50%
Common and preferred OP units	$ 6.3		$ 6.3			6.4
Fox Run
Dividends Payable [Line Items]
Temporary and permanent equity					$ 4.4
Fox Run | Common OP units
Dividends Payable [Line Items]
Units issued (in shares)		31,289
Value at Issuance (in millions)		$ 4.4				$ 4.4
Land for Development | Common OP units
Dividends Payable [Line Items]
Units issued (in shares)	4,452
Value at Issuance (in millions)	$ 0.6

XML

Equity and Temporary Equity - Schedule of Conversions (Details)	3 Months Ended
	Mar. 31, 2024 shares	Mar. 31, 2023 shares
Aspen preferred OP units | Preferred Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	0	270,000
Aspen preferred OP units | Common Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	0	86,224
Common OP units
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	55,781	2,910
Common OP units | Common OP units
Conversion of Stock [Line Items]
Preferred Stock, Convertible, Conversion Ratio	1.0000
Series A-1 preferred OP units | Preferred Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	10,332	0
Preferred Stock, Convertible, Conversion Ratio	2.4390
Series A-1 preferred OP units | Common Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	25,195	0
Series C preferred OP units | Preferred Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	100	65
Preferred Stock, Convertible, Conversion Ratio	1.1100
Series C preferred OP units | Common Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	111	72
Series G preferred OP units | Preferred Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	4,898	1,000
Preferred Stock, Convertible, Conversion Ratio	0.6452
Series G preferred OP units | Common Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	3,160	645
Series H preferred OP units | Preferred Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	9	25
Preferred Stock, Convertible, Conversion Ratio	0.6098
Series H preferred OP units | Common Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	5	15
Series J preferred OP units | Preferred Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	0	1,000
Preferred Stock, Convertible, Conversion Ratio	0.6061
Series J preferred OP units | Common Stock
Conversion of Stock [Line Items]
Conversion of OP units (in shares)	0	606

XML

Equity and Temporary Equity - Schedule of Distributions (Details) - Common Stock - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 15, 2024	Mar. 31, 2024
Dividends Payable [Line Items]
Dividends per share (in dollars per share)		$ 0.94
Subsequent Event
Dividends Payable [Line Items]
Total Distribution (in Millions)	$ 119.7

XML

Equity and Temporary Equity - Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Equity [Abstract]
Net foreign currency translation losses	$ (38.7)	$ (29.5)
Accumulated net gains on derivatives	45.4	41.7
Accumulated other comprehensive income	$ 6.7	$ 12.2

XML

Equity and Temporary Equity Noncontrolling Interests - Common and Preferred OP Units (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($)
Conversion of Stock [Line Items]
OP Units Outstanding | shares	3,321,482
Common and preferred OP units | $	$ 84.9	$ 90.2
Common OP units | Common OP units
Conversion of Stock [Line Items]
OP Units Outstanding | shares	2,683,654
Conversion Of Stock, Exchange Rate	1.0000
Common and preferred OP units | $	$ 42.8	46.5
Preferred Stock | Series A-1 preferred OP units
Conversion of Stock [Line Items]
OP Units Outstanding | shares	191,812
Conversion Of Stock, Exchange Rate	2.4390
Common and preferred OP units | $	$ 10.5	11.5
Annual distribution rate	6.00%
Preferred Stock | A-3 preferred OP units
Conversion of Stock [Line Items]
OP Units Outstanding | shares	40,268
Conversion Of Stock, Exchange Rate	1.8605
Common and preferred OP units | $	$ 2.4	2.4
Annual distribution rate	4.50%
Preferred Stock | Series C preferred OP units
Conversion of Stock [Line Items]
OP Units Outstanding | shares	305,748
Conversion Of Stock, Exchange Rate	1.1100
Common and preferred OP units | $	$ 20.9	21.4
Annual distribution rate	5.00%
Preferred Stock | Series E preferred OP units
Conversion of Stock [Line Items]
OP Units Outstanding | shares	80,000
Conversion Of Stock, Exchange Rate	0.6897
Common and preferred OP units | $	$ 6.3	6.4
Annual distribution rate	5.50%
Preferred Stock | Series L Preferred OP Units
Conversion of Stock [Line Items]
OP Units Outstanding | shares	20,000
Conversion Of Stock, Exchange Rate	0.6250
Common and preferred OP units | $	$ 2.0	$ 2.0
Annual distribution rate	3.50%

XML

Share-Based Compensation - Narrative (Details)	3 Months Ended
	Mar. 31, 2024 plan shares	Mar. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of share-based compensation plans | plan	2
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares) | shares	166,304	203,898
Restricted Stock | Directors | Time Based | 2004 Non-employee Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Restricted Stock | Key Employees and Executive Officers | Time Based | 2015 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Restricted Stock | Executive Officers | Market Condition | 2015 Equity Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years

XML

Share-Based Compensation - Schedule of Grants (Details) - Restricted Stock - $ / shares	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
2015 Equity Plan | Time Based | Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	205,540	220,258
Grant date fair value per share (in dollars per share)	$ 132.10	$ 137.16
2015 Equity Plan | Time Based | Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	31,800	62,800
Grant date fair value per share (in dollars per share)	$ 132.13	$ 144.88
2015 Equity Plan | Market Condition | Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	41,400	82,200
Grant date fair value per share (in dollars per share)	$ 98.14	$ 108.60
Two Thousand and Four Director Plan | Time Based | Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	20,000	16,000
Grant date fair value per share (in dollars per share)	$ 129.47	$ 148.12
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Deferred		6,000	2,000

XML

Share-Based Compensation - Schedule of Share-Based Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Share-Based Payment Arrangement [Abstract]
Share-based compensation - expensed	$ 10.1	$ 9.6
Share-based compensation - capitalized	$ 0.4	$ 0.7

XML

Segment Reporting - Schedule of Segments (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Operating revenues	$ 671.3	$ 651.2
Interest	4.6	11.4
Brokerage commissions and other, net	3.0	9.5
General and administrative expense	(78.5)	(64.1)
Catastrophic event-related charges, net	(7.2)	(1.0)
Business combinations	0.0	2.8
Goodwill impairment	0.0	(15.4)	$ (369.9)
Loss on Extinguishment of Debt	(0.6)	0.0
Interest on mandatorily redeemable preferred OP units / equity	0.0	(1.0)
Loss on remeasurement of marketable securities (see Note 16)	0.0	(19.9)
Gain / (loss) on foreign currency exchanges	1.1	(2.7)
Gain / (loss) on dispositions of properties	5.4	(1.6)
Other income / (expense), net	8.0	(1.0)
Loss on remeasurement of notes receivable	(0.7)	(1.7)
Total Income / (Loss) from Nonconsolidated Affiliates	1.4	(0.2)
Gain / (loss) on remeasurement of investment in nonconsolidated affiliates	5.2	(4.5)
Current tax expense	(2.1)	(3.9)
Deferred tax benefit	5.7	4.6
Net Loss	(25.5)	(48.3)
Less: Preferred return to preferred OP units / equity interests	3.2	2.4
Less: Loss attributable to noncontrolling interests	(1.3)	(5.8)
Net loss attributable to SUI common shareholders	(27.4)	(44.9)
MH
Segment Reporting Information [Line Items]
Operating revenues	272.0	281.5
Interest	3.1	10.3
Brokerage commissions and other, net	1.0	3.8
RV
Segment Reporting Information [Line Items]
Operating revenues	118.6	117.4
Interest	1.4	0.9
Brokerage commissions and other, net	0.7	4.7
Marinas
Segment Reporting Information [Line Items]
Operating revenues	202.0	181.3
Interest	0.1	0.2
Brokerage commissions and other, net	1.0	0.9
UK Segment
Segment Reporting Information [Line Items]
Operating revenues	78.7	71.0
Interest	0.0	0.0
Brokerage commissions and other, net	0.3	0.1
Operating Segments
Segment Reporting Information [Line Items]
Operating revenues	663.7	630.3
Operating expenses / Cost of sales	358.8	349.7
NOI	304.9	280.6
Operating Segments | MH
Segment Reporting Information [Line Items]
Operating revenues	267.9	267.4
Operating expenses / Cost of sales	100.5	107.1
NOI	167.4	160.3
Operating Segments | RV
Segment Reporting Information [Line Items]
Operating revenues	116.5	111.8
Operating expenses / Cost of sales	64.0	66.5
NOI	52.5	45.3
Operating Segments | Marinas
Segment Reporting Information [Line Items]
Operating revenues	200.9	180.2
Operating expenses / Cost of sales	139.3	121.3
NOI	61.6	58.9
Operating Segments | UK Segment
Segment Reporting Information [Line Items]
Operating revenues	78.4	70.9
Operating expenses / Cost of sales	55.0	54.8
NOI	23.4	16.1
Segment Reconciling Items
Segment Reporting Information [Line Items]
General and administrative expense	(78.5)	(64.1)
Catastrophic event-related charges, net	(7.2)	(1.0)
Business combinations	0.0	(2.8)
Depreciation and amortization	(165.3)	(155.6)
Asset impairments	20.7	2.4
Loss on Extinguishment of Debt	(0.6)	0.0
Interest expense	(89.7)	(76.6)
Interest on mandatorily redeemable preferred OP units / equity	0.0	(1.0)
Loss on remeasurement of marketable securities (see Note 16)	0.0	(19.9)
Gain / (loss) on foreign currency exchanges	1.1	(2.7)
Gain / (loss) on dispositions of properties	5.4	(1.6)
Other income / (expense), net	8.0	(1.0)
Loss on remeasurement of notes receivable	(0.7)	(1.7)
Total Income / (Loss) from Nonconsolidated Affiliates	1.4	(0.2)
Gain / (loss) on remeasurement of investment in nonconsolidated affiliates	5.2	(4.5)
Current tax expense	(2.1)	(3.9)
Deferred tax benefit	$ 5.7	$ 4.6

XML

Segment Reporting - Schedule of Identifiable Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Investment property, net	$ 14,457.9	$ 14,443.6
Cash, cash equivalents and restricted cash	132.5	42.7	$ 74.8	$ 90.4
Inventory of manufactured homes	191.0	205.6
Total Notes and Other Receivables, net	469.1	421.6
Collateralized receivables, net	56.5	56.2
Goodwill	731.4	733.0
Other intangible assets, net	361.7	369.5
Other assets, net	713.2	668.5
Total Assets	17,113.3	16,940.7
MH
Segment Reporting Information [Line Items]
Investment property, net	5,267.9	5,317.4
Cash, cash equivalents and restricted cash	71.1	20.1
Inventory of manufactured homes	94.4	103.1
Total Notes and Other Receivables, net	211.7	159.1
Collateralized receivables, net	56.5	56.2
Goodwill	0.0	0.0
Other intangible assets, net	13.1	14.3
Other assets, net	269.0	271.0
Total Assets	5,983.7	5,941.2
RV
Segment Reporting Information [Line Items]
Investment property, net	3,699.2	3,718.8
Cash, cash equivalents and restricted cash	36.9	11.8
Inventory of manufactured homes	24.3	24.3
Total Notes and Other Receivables, net	157.7	119.7
Collateralized receivables, net	0.0	0.0
Goodwill	9.5	9.5
Other intangible assets, net	28.3	29.0
Other assets, net	51.9	47.6
Total Assets	4,007.8	3,960.7
Marinas
Segment Reporting Information [Line Items]
Investment property, net	3,257.6	3,214.5
Cash, cash equivalents and restricted cash	16.2	6.4
Inventory of manufactured homes	0.0	0.0
Total Notes and Other Receivables, net	60.4	54.3
Collateralized receivables, net	0.0	0.0
Goodwill	541.5	541.5
Other intangible assets, net	248.5	252.2
Other assets, net	250.4	240.7
Total Assets	4,374.6	4,309.6
UK Segment
Segment Reporting Information [Line Items]
Investment property, net	2,233.2	2,192.9
Cash, cash equivalents and restricted cash	8.3	4.4
Inventory of manufactured homes	72.3	78.2
Total Notes and Other Receivables, net	39.3	88.5
Collateralized receivables, net	0.0	0.0
Goodwill	180.4	182.0
Other intangible assets, net	71.8	74.0
Other assets, net	141.9	109.2
Total Assets	$ 2,747.2	$ 2,729.2

XML

Income Taxes (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income Tax Examination [Line Items]
Percentage of gross income	95.00%
Percentage of REIT taxable income	90.00%
Net deferred tax liabilities	$ 309,100,000		$ 277,100,000
Valuation allowance	61,900,000		58,100,000
Deferred tax liabilities	371,000,000		$ 335,200,000
Unrecognized tax benefits	0	$ 0
Withholding taxes current tax expense	2,100,000	3,900,000
Deferred Income Tax Expense (Benefit)	(5,700,000)	(4,600,000)
Deferred Federal Income Tax Expense (Benefit)	$ 5,700,000	$ 4,600,000

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Earnings Per Share - Schedule of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator
Net loss attributable to SUI common shareholders	$ (27.4)	$ (44.9)
Less: allocation to restricted stock awards	(0.2)	(0.2)
Basic earnings - net loss attributable to common shareholders after allocation to restricted stock awards	(27.2)	(44.7)
Diluted earnings - net loss attributable to common shareholders after allocation to common and preferred OP units(1)	$ (28.2)	$ (45.8)
Denominator
Weighted average common shares outstanding (in shares)	123.6	123.3
Add: dilutive restricted stock (in shares)	0.3	0.4
Add: common and preferred OP units dilutive effect (in shares)	2.7	2.5
Diluted weighted average common shares and securities (in shares)	126.6	126.2
Basic earning per share (in dollars per share)	$ (0.22)	$ (0.36)
Diluted earning per share (in dollars per share)	$ (0.22)	$ (0.36)
Restricted Stock
Numerator
Add: allocation to restricted stock awards	$ (0.2)	$ (0.2)
Common OP units
Numerator
Add: allocation to restricted stock awards	$ (0.8)	$ (0.9)

XML

Earnings Per Share - Schedule of Antidilutive Securities Excluded from EPS (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	3,242	4,262
Common OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	0	0
Series A-1 preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	192	208
A-3 preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	40	40
Aspen preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)		989
Series C preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	306	306
Series D preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	489	489
Series E preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	80	80
Series F preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	90	90
Series G preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	206	240
Series H preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	581	581
Series J preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	238	239
Series K preferred OP units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	1,000	1,000
Series L
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total securities (in shares)	20

XML

Derivative Financial Instruments - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) Contract contract	Jan. 31, 2024 segment	Dec. 31, 2023 Contract	Mar. 31, 2023 USD ($) contract
Derivative Instruments, Gain (Loss) [Line Items]
Number of Contracts | contract				2
Aggregate notional value				$ 177.3
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Number of Contracts | contract	1
Aggregate notional value	$ 25.0
Forward Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Number of derivatives settled | segment		7
Treasury Lock
Derivative Instruments, Gain (Loss) [Line Items]
Number of Contracts | contract				2
Aggregate notional value				$ 100.0
Designated as Hedging Instrument | Cash Flow Hedging | Treasury Lock and Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Number of Contracts | Contract	7		13
Reclassification of derivatives	$ 16.3

XML

Derivative Financial Instruments - Schedule of Fair Value of Derivatives (Details) £ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) contract	Mar. 31, 2023 USD ($) contract	Dec. 31, 2023 USD ($)	Mar. 31, 2023 GBP (£) contract
Derivative [Line Items]
Number of Contracts | contract		2		2
Notional		$ 177.3
Proceeds from Hedge, Financing Activities		7.4
Derivative, Notional Amount, terminated	$ 255.0	$ 250.0
Payments for Hedge, Financing Activities	(2.3)
Interest Rate Swap and Forward Contracts | Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Notional	806.2		$ 1,041.5
Derivative liabilities	0.9		7.7
Interest Rate Swap and Forward Contracts | Significant Other Observable Inputs (Level 2) | Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Fair value of assets	$ 12.2		$ 11.7
Interest Rate Swap
Derivative [Line Items]
Number of Contracts | contract	1
Notional	$ 25.0
Interest Rate Swap, GBP
Derivative [Line Items]
Number of Contracts | contract		1		1
Notional		$ 127.3		£ 100.0
Interest Rate Swap, USD
Derivative [Line Items]
Number of Contracts | contract		1		1
Notional		$ 50.0
Treasury Lock
Derivative [Line Items]
Number of Contracts | contract		2		2
Notional		$ 100.0
Forward Swap
Derivative [Line Items]
Number of Contracts | contract		1		1
Notional		$ 50.0

XML

Derivative Financial Instruments - Schedule of Gains (Losses) on Derivatives (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Change in unrealized gain / (loss) on interest rate derivatives	$ 8.8	$ (8.6)
Gains / (losses) on derivative instruments reclassified form AOCI into earnings	4.9	2.3
Designated as Hedging Instrument | Cash Flow Hedging | Treasury Lock and Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Gains / (losses) on derivative instruments reclassified form AOCI into earnings	$ 4.9	$ 2.3

XML

Fair Value of Financial Instruments - Schedule of Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Financial Assets
Cash, cash equivalents and restricted cash	$ 132,500	$ 42,700	$ 74,800	$ 90,400
Total Notes and Other Receivables, net	469,100	421,600
Financial Liabilities
Secured debt	3,521,600	3,534,700
Senior unsecured notes	2,673,700	2,177,500
Total unsecured debt	4,350,400	4,242,600
Loan Amount	3,465,500	3,478,900
Secured borrowings on collateralized receivables (See Note 5)	56,100	55,800
Collateralized receivables, net	56,500	56,200
Interest Rate Swap and Forward Contracts | Cash Flow Hedging | Designated as Hedging Instrument
Financial Liabilities
Derivative liabilities	900	7,700
Installment notes receivable on manufactured homes, net
Financial Liabilities
Collateralized receivables, net	56,500
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Financial Liabilities
Collateralized receivables, net	0	0
Significant Other Observable Inputs (Level 2)
Financial Liabilities
Collateralized receivables, net	0	0
Significant Other Observable Inputs (Level 2) | Interest Rate Swap and Forward Contracts | Cash Flow Hedging | Designated as Hedging Instrument
Financial Assets
Derivative assets	12,200	11,700
Significant Unobservable Inputs (Level 3)
Financial Liabilities
Collateralized receivables, net	56,500	56,200
Carrying Value
Financial Liabilities
Secured debt	3,521,600	3,534,700
Collateralized receivables, net		56,200
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net
Financial Assets
Total assets measured at fair value	38,300	19,600	62,200	65,900
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators
Financial Assets
Total assets measured at fair value	127,700	134,500	$ 435,000	$ 305,200
Fair Value, Recurring | Carrying Value
Financial Assets
Cash, cash equivalents and restricted cash	132,500	42,700
Derivative assets	12,200	11,700
Total assets measured at fair value	367,200	264,700
Financial Liabilities
Senior unsecured notes	2,673,700	2,177,500
Line of credit and other unsecured debt	1,676,700	2,065,100
Total unsecured debt	4,350,400	4,242,600
Derivative liabilities	900	7,700
Other financial liabilities (contingent consideration)	20,200	20,200
Total liabilities measured at fair value	7,893,100	7,805,200
Loan Amount	3,465,500	3,478,900
Fair Value, Recurring | Carrying Value | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	38,300	19,600
Fair Value, Recurring | Carrying Value | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	127,700	134,500
Fair Value, Recurring | Carrying Value | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Financial Liabilities
Loan Amount		0
Fair Value, Recurring | Estimate of Fair Value Measurement
Financial Assets
Cash, cash equivalents and restricted cash	132,500	42,700
Derivative assets	12,200	11,700
Total assets measured at fair value	367,200	264,700
Financial Liabilities
Secured debt	3,145,400	3,222,800
Senior unsecured notes	2,440,000	1,973,200
Line of credit and other unsecured debt	1,676,700	2,065,100
Total unsecured debt	4,116,700	4,038,300
Derivative liabilities	900	7,700
Other financial liabilities (contingent consideration)	20,200	20,200
Total liabilities measured at fair value	7,283,200	7,289,000
Loan Amount	3,089,300	3,167,000
Secured borrowings on collateralized receivables (See Note 5)	56,100	55,800
Collateralized receivables, net	56,500	56,200
Fair Value, Recurring | Estimate of Fair Value Measurement | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	38,300	19,600
Fair Value, Recurring | Estimate of Fair Value Measurement | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	127,700	134,500
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1)
Financial Assets
Cash, cash equivalents and restricted cash	132,500	42,700
Derivative assets	0	0
Total assets measured at fair value	132,500	42,700
Financial Liabilities
Secured debt	0
Senior unsecured notes	0	0
Line of credit and other unsecured debt	0	0
Total unsecured debt	0	0
Derivative liabilities	0	0
Other financial liabilities (contingent consideration)	0	0
Total liabilities measured at fair value	0	0
Loan Amount	0
Secured borrowings on collateralized receivables (See Note 5)	0	0
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	0	0
Fair Value, Recurring | Estimate of Fair Value Measurement | Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	0	0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2)
Financial Assets
Cash, cash equivalents and restricted cash	0	0
Derivative assets	12,200	11,700
Total assets measured at fair value	12,200	11,700
Financial Liabilities
Secured debt	3,089,300	3,167,000
Senior unsecured notes	2,440,000	1,973,200
Line of credit and other unsecured debt	1,676,700	2,065,100
Total unsecured debt	4,116,700	4,038,300
Derivative liabilities	900	7,700
Other financial liabilities (contingent consideration)	0	0
Total liabilities measured at fair value	7,206,900	7,213,000
Loan Amount	3,089,300	3,167,000
Secured borrowings on collateralized receivables (See Note 5)	0	0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	0	0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Other Observable Inputs (Level 2) | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	0	0
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3)
Financial Assets
Cash, cash equivalents and restricted cash	0	0
Derivative assets	0	0
Total assets measured at fair value	222,500	210,300
Financial Liabilities
Secured debt	56,100	55,800
Senior unsecured notes	0	0
Line of credit and other unsecured debt	0	0
Total unsecured debt	0	0
Derivative liabilities	0	0
Other financial liabilities (contingent consideration)	20,200	20,200
Total liabilities measured at fair value	76,300	76,000
Loan Amount	0	0
Secured borrowings on collateralized receivables (See Note 5)	56,100	55,800
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net
Financial Assets
Total Notes and Other Receivables, net	38,300	19,600
Fair Value, Recurring | Estimate of Fair Value Measurement | Significant Unobservable Inputs (Level 3) | Notes receivable from real estate developers and operators
Financial Assets
Total Notes and Other Receivables, net	$ 127,700	$ 134,500

XML

Fair Value of Financial Instruments - Schedule of Marketable Securities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Sale of Marketable Securities, Underwriting and Other Fees	$ 1.0
Ingenia Communities Group
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Marketable Security, Realized Gain (Loss)	(8.0)
Marketable securities | Ingenia Communities Group
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Number of Shares Sold, Investment	41.8
Proceeds from Sale and Maturity of Marketable Securities	102.5
Fair Value, Recurring | Marketable securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	127.3
Change in fair value measurement	(16.0)
Investment, Foreign Current Translation Adjustment	(7.8)
Disposition of investment	(103.5)
Ending Balance	$ 0.0

XML

Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Apr. 12, 2022	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment property, net		$ 14,457.9	$ 14,443.6
MH
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment property, net		5,267.9	5,317.4
UK Segment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment property, net		$ 2,233.2	$ 2,192.9
Designated as Hedging Instrument | Cash Flow Hedging | Treasury Lock
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term of derivates	10 years

XML

Fair Value of Financial Instruments - Schedule of Level 3 Instruments at Fair Value (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Assets
Foreign currency exchange losses	$ 1.1	$ (2.7)
Liabilities
Investment property, net	14,457.9		$ 14,443.6
Transfers Accounted for as Secured Borrowings, Associated Liabilities
Liabilities
Beginning balance	55.8
Ending balance	56.1
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Contingent Consideration
Liabilities
Beginning balance	20.2	20.2
Ending balance	20.2	20.2
Realized losses	0.0	0.0
Purchases and issuances	0.0	0.0
Other adjustments	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Transfers Accounted for as Secured Borrowings, Associated Liabilities
Liabilities
Realized losses	1.6
Purchases and issuances	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Other Adjustments	0.0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements	(1.3)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net
Assets
Beginning balance	19.6	65.9
Foreign currency exchange losses	0.0	0.0
Ending balance	38.3	62.2
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Realized gains / (losses)
Assets
Changes to fair value	0.0	(1.7)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Purchases and issuances
Assets
Changes to fair value	19.4	0.1
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Sales and settlements
Assets
Changes to fair value	(0.7)	(2.1)
Liabilities
Purchases and issuances	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Installment notes receivable on manufactured homes, net | Other Adjustments
Assets
Changes to fair value	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net
Assets
Beginning balance	56.2	0.0
Foreign currency exchange losses	0.0	0.0
Ending balance	56.5	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Realized gains / (losses)
Assets
Changes to fair value	1.6	(0.4)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Purchases and issuances
Assets
Changes to fair value	0.0	0.4
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Sales and settlements
Assets
Changes to fair value	(1.3)	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Collateralized Receivables, net | Other Adjustments
Assets
Changes to fair value	0.0	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators
Assets
Beginning balance	134.5	305.2
Foreign currency exchange losses	(0.1)	0.0
Ending balance	127.7	435.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Realized gains / (losses)
Assets
Changes to fair value	(0.8)	0.0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Purchases and issuances
Assets
Changes to fair value	5.0	124.3
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Sales and settlements
Assets
Changes to fair value	(10.9)	(3.0)
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) | Notes Receivable from Real Estate Developers and Operators | Other Adjustments
Assets
Changes to fair value	$ 0.0	$ 8.5

XML

Commitments and Contingencies (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) property developmentSite	Mar. 31, 2023 USD ($)	Aug. 31, 2023 defendant	Sep. 28, 2022 developmentSite property
Loss Contingencies [Line Items]
Asset impairments	$ 20.7		$ 2.4
Catastrophic event-related charges, net	7.2		$ 1.0
In Re Manufactured Home Lot Rents Antitrust Litigation No.123 Cv06715 Member
Loss Contingencies [Line Items]
Number of additional defendants | defendant				9
Hurricane Ian
Loss Contingencies [Line Items]
Number of affected properties in Florida | property					3
Number of affected sites | developmentSite					2,500
Estimated insurance recoveries	52.8	$ 56.7
Change in estimated property insurance recoveries	3.0
Proceeds received from insurer	6.9
Incremental costs	3.0
Flood | RV
Loss Contingencies [Line Items]
Number of affected sites | developmentSite		300
Impairment adjustment	3.1	$ 7.0
Unusual Or Infrequent Item, Number Of Properties Affected By Natural Disasters | property		1
Catastrophic event-related charges, net	4.7
Flood | Debris Removal and Clean up | RV
Loss Contingencies [Line Items]
Catastrophic event-related charges, net	$ 1.6

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Leases - Schedule of Future Minimum Lease Payments (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Operating Leases
2024 (excluding three months ended March 31, 2024)	$ 10.7
2025	14.0
2026	12.5
2027	10.5
2028	9.8
Thereafter	240.4
Total Lease Payments	297.9
Less: Imputed interest	(136.3)
Present Value of Lease Liabilities	161.6	$ 159.5
Finance Leases
2024 (excluding three months ended March 31, 2024)	4.4
2025	0.5
2026	0.5
2027	0.5
2028	0.5
Thereafter	21.3
Total Lease Payments	27.7
Less: Imputed interest	(13.7)
Present Value of Lease Liabilities	14.0	$ 14.3
Total
2024 (excluding three months ended March 31, 2024)	15.1
2025	14.5
2026	13.0
2027	11.0
2028	10.3
Thereafter	261.7
Total Lease Payments	325.6
Less: Imputed interest	(150.0)
Present Value of Lease Liabilities	$ 175.6

XML

Leases - Schedule of ROU Assets and Lease Liabilities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Leases [Abstract]
Finance lease - ROU asset, net of accumulated amortization	$ 31.7		$ 32.6
Operating lease - ROU asset, net	177.4		176.0
Below market operating leases, net	93.8		95.0
Finance lease liabilities	14.0		14.3
Operating lease liabilities	161.6		$ 159.5
Amortization of ROU assets	0.7	$ 0.7
Interest on lease liabilities	0.2	0.2
Operating lease cost	4.4	4.6
Variable lease cost	2.0	1.6
Total Lease Cost	$ 7.3	$ 7.1

XML

Leases - Schedule of Lease Term, Discount Rates and Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Leases [Abstract]
Weighted - average remaining lease term - finance leases	36 years 10 months 9 days		36 years 7 months 17 days
Weighted - average remaining lease term - operating leases	34 years 2 months 1 day		27 years 8 months 15 days
Weighted - average discount rate - finance leases	3.60%		3.59%
Weighted - average discount rate - operating leases	3.78%		3.82%
Operating cash outflows for operating leases	$ 3.0	$ 3.3
Financing cash outflows for finance leases	0.2	5.9
Total Cash Paid on Lease Liabilities	$ 3.2	$ 9.2

XML

Leases - Schedule of Future Lease Payments Under Non-Cancellable Leases (Details) $ in Millions	Mar. 31, 2024 USD ($)
Leases [Abstract]
2024 (excluding the three months ended March 31, 2024)	$ 18.7
2025	18.1
2026	13.1
2027	8.8
2028	7.8
Thereafter	81.5
Total Undiscounted Cash Flows	$ 148.0

XML

Leases - Schedule of Lease Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Lessor, Lease, Description [Line Items]
Variable lease income	$ 3.4	$ 1.5
Real Estate Operator
Lessor, Lease, Description [Line Items]
Fixed lease income	$ 8.7	$ 7.9

XML

Leases - Narrative (Details) - Park Holidays - UNITED KINGDOM $ in Millions	Mar. 31, 2024 GBP (£) developmentSite	Mar. 31, 2024 USD ($) developmentSite	Dec. 31, 2023 USD ($)
Lessee, Lease, Description [Line Items]
Number of ground leases | developmentSite	34	34
Lease repurchase amount | £	£ 1.00
Ground lease financial liability | $		$ 357.1	$ 359.7

XML

Leases - Schedule of Future Minimum Rental Payments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Lessee, Lease, Description [Line Items]
Fixed lease income	$ 476.9	$ 441.6
Park Holidays | UNITED KINGDOM
Lessee, Lease, Description [Line Items]
2024 (excluding three months ended March 31, 2024)	10.6
2025	11.9
2026	12.0
2027	12.1
2028	12.0
Thereafter	1,742.9
Total Payments	1,801.5
Less: Imputed interest	(1,444.4)
Present Value of Financial Liability	$ 357.1		$ 359.7

XML

Subsequent Event (Details) $ in Millions			1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 15, 2024 USD ($) site	Apr. 01, 2024 USD ($) site shares	Apr. 15, 2024 USD ($) site	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 site developmentSite
Subsequent Event [Line Items]
Sites, Wet Slips and Dry Storage Spaces							92
Development Sites | developmentSite							72
Total consideration | $						$ 112.1
Issuance of common stock and common OP units, net | $				$ 0.3	$ 4.4
Common OP units | Port Milford
Subsequent Event [Line Items]
Issuance of stock and units (in shares) | shares		19,326
Issuance of common stock and common OP units, net | $		$ 2.5
Subsequent Event
Subsequent Event [Line Items]
Sites, Wet Slips and Dry Storage Spaces	185		185
Development Sites	0		0
Total consideration | $			$ 12.0
Subsequent Event | Port Milford
Subsequent Event [Line Items]
Sites, Wet Slips and Dry Storage Spaces		92
Development Sites		0
Total consideration | $		$ 4.0
Subsequent Event | Oak Leaf
Subsequent Event [Line Items]
Sites, Wet Slips and Dry Storage Spaces	89		89
Development Sites	0		0
Total consideration | $	$ 5.0
Subsequent Event | Berth One Palm Beach
Subsequent Event [Line Items]
Sites, Wet Slips and Dry Storage Spaces	4		4
Development Sites	0		0
Total consideration | $	$ 3.0

XML

Label	Element	Value
Marketable Securities [Member] | Fair Value, Recurring [Member]
Investments, Fair Value Disclosure	us-gaap_InvestmentsFairValueDisclosure	$ 0