10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended December 31, 2023

OR

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

Commission file number: 001-36557

ADVANCED DRAINAGE SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

Delaware	51-0105665
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

4640 Trueman Boulevard, Hilliard, Ohio 43026

(Address of Principal Executive Offices, Including Zip Code)

(614) 658-0050

(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 per share	WMS	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 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. (Check one):

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 ☒

As of January 31, 2024, the registrant had 77,616,828 shares of common stock outstanding, which excludes 206,524 shares of unvested restricted common stock. The shares of common stock trade on the New York Stock Exchange under the ticker symbol “WMS.”

TABLE OF CONTENTS

PART I. FINANCIAL INFORMATION
Item 1.	Condensed Consolidated Financial Statements (Unaudited)	Page
	Condensed Consolidated Balance Sheets as of December 31, 2023 and March 31, 2023	3
	Condensed Consolidated Statements of Operations for the three and nine months ended December 31, 2023 and 2022	4
	Condensed Consolidated Statements of Comprehensive Income for the three and nine months ended December 31, 2023 and 2022	5
	Condensed Consolidated Statements of Cash Flows for the nine months ended December 31, 2023 and 2022	6
	Condensed Consolidated Statements of Stockholders’ Equity and Mezzanine Equity for the three and nine months ended December 31, 2023 and 2022	7
	Notes to the Condensed Consolidated Financial Statements	9
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	26
Item 4.	Controls and Procedures	26
PART II. OTHER INFORMATION
Item 1.	Legal Proceedings	27
Item 1A.	Risk Factors	27
Item 2.	Unregistered Sale of Equity Securities and Use of Proceeds	27
Item 3.	Defaults Upon Senior Securities	27
Item 4.	Mine Safety Disclosures	27
Item 5.	Other Information	27
Item 6.	Exhibits	28
Signatures		29

- ii -

PART I. FINANCIAL INFORMATION

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited) (In thousands, except par value)

	December 31, 2023		March 31, 2023
ASSETS
Current assets:
Cash	$	560,744	$	217,128
Receivables (less allowance for doubtful accounts of $6,058 and $8,227, respectively)	240,810		306,945
Inventories	405,409		463,994
Other current assets	31,459		29,422
Total current assets	1,238,422		1,017,489
Property, plant and equipment, net	810,887		733,059
Other assets:
Goodwill	617,397		620,193
Intangible assets, net	365,631		407,627
Other assets	129,622		122,757
Total assets	$	3,161,959	$	2,901,125
LIABILITIES, MEZZANINE EQUITY AND STOCKHOLDERS’ EQUITY
Current liabilities:
Current maturities of debt obligations	$	12,275	$	14,693
Current maturities of finance lease obligations	12,844		8,541
Accounts payable	207,902		210,111
Other accrued liabilities	162,275		142,400
Accrued income taxes	13,829		3,057
Total current liabilities	409,125		378,802
Long-term debt obligations (less unamortized debt issuance costs of $10,270 and $11,804, respectively)	1,261,742		1,269,391
Long-term finance lease obligations	37,947		32,272
Deferred tax liabilities	159,296		159,056
Other liabilities	71,980		66,744
Total liabilities	1,940,090		1,906,265
Commitments and contingencies (see Note 9)
Mezzanine equity:
Redeemable common stock: $0.01 par value; 7,488 and 9,429 shares outstanding, respectively	121,686		153,220
Total mezzanine equity	121,686		153,220
Stockholders’ equity:
Common stock; $0.01 par value: 1,000,000 shares authorized; 81,415 and 79,057  shares issued, respectively; 70,200 and 69,518 shares outstanding, respectively	11,670		11,647
Paid-in capital	1,195,893		1,134,864
Common stock in treasury, at cost	(1,110,670)		(920,999)
Accumulated other comprehensive loss	(26,601)		(27,580)
Retained earnings	1,008,270		626,215
Total ADS stockholders’ equity	1,078,562		824,147
Noncontrolling interest in subsidiaries	21,621		17,493
Total stockholders’ equity	1,100,183		841,640
Total liabilities, mezzanine equity and stockholders’ equity	$	3,161,959	$	2,901,125

See accompanying Notes to Condensed Consolidated Financial Statements.

- 3 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited) (In thousands, except per share data)

	Three Months Ended December 31,				Nine Months Ended December 31,
	2023		2022		2023		2022
Net sales	$	662,367	$	655,167	$	2,220,633	$	2,453,562
Cost of goods sold	402,518		431,250		1,326,647		1,557,575
Gross profit	259,849		223,917		893,986		895,987
Operating expenses:
Selling, general and administrative	91,289		85,936		269,525		261,095
Loss (gain) on disposal of assets and costs from exit and disposal activities	2,512		(348)		(10,669)		(147)
Intangible amortization	12,782		13,842		38,376		41,360
Income from operations	153,266		124,487		596,754		593,679
Other expense:
Interest expense	22,331		20,001		65,984		49,334
Derivative gain and other income, net	(4,772)		(4,125)		(15,827)		(5,632)
Income before income taxes	135,707		108,611		546,597		549,977
Income tax expense	30,131		26,068		132,665		128,641
Equity in net income of unconsolidated affiliates	(1,304)		(639)		(3,880)		(3,705)
Net income	106,880		83,182		417,812		425,041
Less: net income attributable to noncontrolling interest	1,241		1,142		2,719		3,848
Net income attributable to ADS	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average common shares outstanding:
Basic	77,857		82,067		78,455		82,891
Diluted	78,586		82,987		79,188		83,980
Net income per share:
Basic	$	1.36	$	1.00	$	5.29	$	5.08
Diluted	$	1.34	$	0.99	$	5.24	$	5.02

See accompanying Notes to Condensed Consolidated Financial Statements.

- 4 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited) (In thousands)

	Three Months Ended December 31,				Nine Months Ended December 31,
	2023		2022		2023		2022
Net income	$	106,880	$	83,182	$	417,812	$	425,041
Currency translation gain (loss)	4,020		4,973		2,388		(4,688)
Comprehensive income	110,900		88,155		420,200		420,353
Less: other comprehensive income attributable to noncontrolling interest	963		1,069		1,409		797
Less: net income attributable to noncontrolling interest	1,241		1,142		2,719		3,848
Total comprehensive income attributable to ADS	$	108,696	$	85,944	$	416,072	$	415,708

See accompanying Notes to Condensed Consolidated Financial Statements.

- 5 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited) (In thousands)

	Nine Months Ended December 31,
	2023		2022
Cash Flows from Operating Activities
Net income	$	417,812	$	425,041
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	112,014		107,346
Deferred income taxes	335		(4,165)
Gain on disposal of assets and costs from exit and disposal activities	(10,669)		(147)
Stock-based compensation	23,636		19,912
Amortization of deferred financing charges	1,533		909
Fair market value adjustments to derivatives	(162)		2,309
Equity in net income of unconsolidated affiliates	(3,880)		(3,705)
Other operating activities	5,720		2,732
Changes in working capital:
Receivables	67,230		99,958
Inventories	59,752		34,871
Prepaid expenses and other current assets	(534)		(4,532)
Accounts payable, accrued expenses, and other liabilities	27,475		(20,091)
Net cash provided by operating activities	700,262		660,438
Cash Flows from Investing Activities
Capital expenditures	(136,385)		(126,858)
Proceeds from disposition of assets	19,979		—
Acquisition, net of cash acquired	—		(48,010)
Other investing activities	527		46
Net cash used in investing activities	(115,879)		(174,822)
Cash Flows from Financing Activities
Payments on syndicated Term Loan Facility	(5,250)		(5,250)
Proceeds from Revolving Credit Agreement	—		26,200
Payments on Revolving Credit Agreement	—		(140,500)
Proceeds from Amended Revolving Credit Agreement	—		97,000
Payments on Amended Revolving Credit Agreement	—		(97,000)
Proceeds from Senior Notes due 2030	—		500,000
Debt issuance costs	—		(11,575)
Payments on Equipment Financing	(6,361)		(10,213)
Payments on finance lease obligations	(8,624)		(4,954)
Repurchase of common stock	(178,187)		(375,027)
Cash dividends paid	(33,111)		(30,111)
Dividends paid to noncontrolling interest holder	—		(3,652)
Proceeds from exercise of stock options	3,956		5,145
Payment of withholding taxes on vesting of restricted stock units	(8,859)		(28,653)
Net cash used in financing activities	(236,436)		(78,590)
Effect of exchange rate changes on cash	1,271		(461)
Net change in cash	349,218		406,565
Cash and restricted cash at beginning of period	217,128		20,125
Cash and restricted cash at end of period	$	566,346	$	426,690
RECONCILIATION TO BALANCE SHEET
Cash	$	560,744
Restricted cash (included in Other assets in the Condensed Consolidated Balance Sheets)	5,602
Total cash and restricted cash	$	566,346

See accompanying Notes to Condensed Consolidated Financial Statements.

- 6 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND MEZZANINE EQUITY

(Unaudited) (In thousands)

	Common Stock			Paid -In Capital		Common Stock in Treasury			Accumulated Other Compre-hensive Loss		Retained Earnings		Total ADS Stockholders’ Equity		Non- controlling Interest in  Subsidiaries		Total Stock- holders’ Equity		Redeemable Common Stock			Redeemable Convertible Preferred Stock			Total Mezzanine Equity
	Shares	Amount				Shares	Amount												Shares	Amount		Shares	Amount
Balance at October 1, 2022	78,519	$	11,642	$	1,119,453	5,314	$	(536,697)	$	(33,775)	$	477,790	$	1,038,413	$	17,329	$	1,055,742	9,840	$	159,928	—	$	—	$	159,928
Net income	—	—		—		—	—		—		82,040		82,040		1,142		83,182		—	—		—	—		—
Other comprehensive income	—	—		—		—	—		3,904		—		3,904		1,069		4,973		—	—		—	—		—
Common stock dividends ($0.12 per share)	—	—		—		—	—		—		(9,819)		(9,819)		—		(9,819)		—	—		—	—		—
Share repurchases	—	—		—		1,891	(179,864)		—		—		(179,864)		—		(179,864)		—	—		—	—		—
Dividends paid to noncontrolling interest holder	—	—		—		—	—		—		—		—		(1,925)		(1,925)		—	—		—	—		—
KSOP redeemable common stock conversion	171	2		2,798		—	—		—		—		2,800		—		2,800		(171)	(2,800)		—	—		(2,800)
Exercise of common stock options	17	—		485		—	—		—		—		485		—		485		—	—		—	—		—
Restricted stock awards	78	1		—		35	(3,141)		—		—		(3,140)		—		(3,140)		—	—		—	—		—
Stock-based compensation expense	—	—		6,179		—	—		—		—		6,179		—		6,179		—	—		—	—		—
Balance at December 31, 2022	78,785	$	11,645	$	1,128,915	7,240	$	(719,702)	$	(29,871)	$	550,011	$	940,998	$	17,615	$	958,613	9,669	$	157,128	—	—		$	157,128
Balance at April 1, 2022	75,529	$	11,612	$	1,065,628	3,220	$	(318,691)	$	(24,386)	$	158,876	$	893,039	$	16,622	$	909,661	—	$	—	15,630	$	195,384	$	195,384
Net income	—	—		—		—	—		—		421,193		421,193		3,848		425,041		—	—		—	—		—
Other comprehensive (loss) income	—	—		—		—	—		(5,485)		—		(5,485)		797		(4,688)		—	—		—	—		—
Common stock dividends ($0.36 per share)	—	—		—		—	—		—		(30,058)		(30,058)		—		(30,058)		—	—		—	—		—
Dividends paid to noncontrolling interest holder	—	—		—		—	—		—		—		—		(3,652)		(3,652)		—	—		—	—		—
Share repurchases	—	—		—		3,756	(375,027)		—		—		(375,027)		—		(375,027)		—	—		—	—		—
ESOP share conversion	—	—		—		—	—		—		—		—		—		—		12,022	195,384		(15,630)	(195,384)		—
KSOP redeemable common stock conversion	2,353	24		38,232		—	—		—		—		38,256		—		38,256		(2,353)	(38,256)		—	—		(38,256)
Exercise of common stock options	200	2		5,143		—	—		—		—		5,145		—		5,145		—	—		—	—		—
Restricted stock awards	176	2		—		59	(5,633)		—		—		(5,631)		—		(5,631)		—	—		—	—		—
Performance-based restricted stock units	527	5		—		205	(20,351)		—		—		(20,346)		—		(20,346)		—	—		—	—		—
Stock-based compensation expense	—	—		19,912		—	—		—		—		19,912		—		19,912		—	—		—	—		—
Balance at December 31, 2022	78,785	$	11,645	$	1,128,915	7,240	$	(719,702)	$	(29,871)	$	550,011	$	940,998	$	17,615	$	958,613	9,669	$	157,128	—	—		$	157,128

See accompanying Notes to Condensed Consolidated Financial Statements.

- 7 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY AND MEZZANINE EQUITY

(Unaudited) (In thousands)

	Common Stock			Paid -In Capital		Common Stock in Treasury			Accumulated Other Compre-hensive Loss		Retained Earnings		Total ADS Stockholders’ Equity		Non- controlling Interest in  Subsidiaries		Total Stock- holders’ Equity		Redeemable Common Stock			Total Mezzanine Equity
	Shares	Amount				Shares	Amount												Shares	Amount
Balance at October 1, 2023	80,635	$	11,663	$	1,173,574	10,617	$	(1,039,717)	$	(29,658)	$	913,551	$	1,029,413	$	19,417	$	1,048,830	8,206	$	133,349	$	133,349
Net income	—	—		—		—	—		—		105,639		105,639		1,241		106,880		—	—		—
Other comprehensive income	—	—		—		—	—		3,057		—		3,057		963		4,020		—	—		—
Common stock dividends ($0.14 per share)	—	—		—		—	—		—		(10,920)		(10,920)		—		(10,920)		—	—		—
Share repurchases	—	—		—		598	(70,905)		—		—		(70,905)		—		(70,905)		—	—		—
KSOP redeemable common stock conversion	718	7		11,656		—	—		—		—		11,663		—		11,663		(718)	(11,663)		(11,663)
Exercise of common stock options	41	—		1,333		—	—		—		—		1,333		—		1,333		—	—		—
Restricted stock awards	1	—		—		—	(48)		—		—		(48)		—		(48)		—	—		—
Stock-based compensation expense	—	—		7,402		—	—		—		—		7,402		—		7,402		—	—		—
ESPP Share Issuance	20	—		1,927		—	—		—		—		1,927		—		1,927		—	—		—
Other	—	—		1		—	—		—		—		1		—		1		—	—		—
Balance at December 31, 2023	81,415	$	11,670	$	1,195,893	11,215	$	(1,110,670)	$	(26,601)	$	1,008,270	$	1,078,562	$	21,621	$	1,100,183	7,488	$	121,686	$	121,686
Balance at April 1, 2023	79,057	$	11,647	$	1,134,864	9,539	$	(920,999)	$	(27,580)	$	626,215	$	824,147	$	17,493	$	841,640	9,429	$	153,220	$	153,220
Net income	—	—		—		—	—		—		415,093		415,093		2,719		417,812		—	—		—
Other comprehensive income	—	—		—		—	—		979		—		979		1,409		2,388		—	—		—
Common stock dividends ($0.42 per share)	—	—		—		—	—		—		(33,038)		(33,038)		—		(33,038)		—	—		—
Share repurchases	—	—		—		1,579	(180,812)		—		—		(180,812)		—		(180,812)		—	—		—
KSOP redeemable common stock conversion	1,941	19		31,515		—	—		—		—		31,534		—		31,534		(1,941)	(31,534)		(31,534)
Exercise of common stock options	97	1		3,955		—	—		—		—		3,956		—		3,956		—	—		—
Restricted stock awards	100	1		—		25	(2,463)		—		—		(2,462)		—		(2,462)		—	—		—
Performance-based restricted stock units	200	2		—		72	(6,396)		—		—		(6,394)		—		(6,394)		—	—		—
Stock-based compensation expense	—	—		23,636		—	—		—		—		23,636		—		23,636		—	—		—
ESPP Share Issuance	20	—		1,927		—	—		—		—		1,927		—		1,927		—	—		—
Other	—	—		(4)		—	—		—		—		(4)		—		(4)		—	—		—
Balance at December 31, 2023	81,415	$	11,670	$	1,195,893	11,215	$	(1,110,670)	$	(26,601)	$	1,008,270	$	1,078,562	$	21,621	$	1,100,183	7,488	$	121,686	$	121,686

See accompanying Notes to Condensed Consolidated Financial Statements.

- 8 -

ADVANCED DRAINAGE SYSTEMS, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

1.BACKGROUND AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Description of Business - Advanced Drainage Systems, Inc., incorporated in Delaware, and its subsidiaries (collectively referred to as “ADS” or the “Company”) designs, manufactures and markets innovative water management solutions in the stormwater and onsite septic wastewater industries, providing superior drainage solutions for use in the construction and agriculture marketplace. ADS’s products are used across a broad range of end markets and applications, including non-residential, infrastructure and agriculture applications.

The Company is managed and reports results of operations in three reportable segments: Pipe, Infiltrator Water Technologies Ultimate Holdings, Inc (“Infiltrator”) and International. The Company also reports the results of its Allied Products and all other business segments as Allied Products and Other.

Historically, sales of the Company’s products have been higher in the first and second quarters of each fiscal year due to favorable weather and longer daylight conditions accelerating construction activity during these periods. Seasonal variations in operating results may also be impacted by inclement weather conditions, such as cold or wet weather, which can delay projects.

Basis of Presentation - The Company prepares its Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Condensed Consolidated Balance Sheet as of March 31, 2023 was derived from audited financial statements included in the Annual Report on Form 10-K for the year ended March 31, 2023 (“Fiscal 2023 Form 10-K”). The accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as of December 31, 2023 and the results of operations for the three and nine months ended December 31, 2023 and cash flows for the nine months ended December 31, 2023. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, filed in the Company’s Fiscal 2023 Form 10-K.

Principles of Consolidation - The Condensed Consolidated Financial Statements include the Company, its wholly-owned subsidiaries, its majority-owned subsidiaries and variable interest entities (“VIEs”) of which the Company is the primary beneficiary. The Company uses the equity method of accounting for equity investments where it exercises significant influence but does not hold a controlling financial interest. Such investments are recorded in Other assets in the Condensed Consolidated Balance Sheets and the related equity earnings from these investments are included in Equity in net income of unconsolidated affiliates in the Condensed Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.

Recent Accounting Guidance

Improvements to Reportable Segment Disclosures - In November 2023, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update (“ASU”) to amend ASC 280, Segment Reporting to enhance segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. In addition, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. The amendments are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The amendments must be applied retrospectively to all periods presented in the financial statements. The Company is currently evaluating the impact of this standard on the Consolidated Financial Statements.

Improvements to Income Tax Disclosures - In December 2023, the FASB issued an ASU to amend ASC 740, Income Taxes to enhance the transparency and usefulness of income tax disclosures, primarily related to the rate reconciliation and income taxes paid information. The amendments may be applied prospectively or retrospectively and are effective for fiscal years beginning after December 15, 2024. The Company is currently evaluating the impact of this standard on the Consolidated Financial Statements.

Except for the pronouncements described above, there have been no new accounting pronouncements issued or adopted since the filing of the Fiscal 2023 Form 10-K that have significance, or potential significance, to the Consolidated Financial Statements.

- 9 -

2.GAIN ON DISPOSAL OF ASSETS AND COSTS FROM EXIT AND DISPOSAL ACTIVITIES

On April 14, 2023, the Company completed its divestiture of substantially all of the assets of Spartan Concrete, Inc. to a third party purchaser for consideration of $20.0 million. The Company recognized a gain on the sale of $14.9 million in the Condensed Consolidated Statements of Operations. Prior to the divestiture, the Company recorded the results of operations in Allied & Other.

3.REVENUE RECOGNITION

Revenue Disaggregation - The Company disaggregates net sales by Domestic, International and Infiltrator and further disaggregates Domestic and International by product type, consistent with its reportable segment disclosure. This disaggregation level best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Refer to “Note 12. Business Segments Information” for the Company’s disaggregation of Net sales by reportable segment.

Contract Balances - The Company recognizes a contract asset representing the Company’s right to recover products upon the receipt of returned products and a contract liability for the customer refund. The following table presents the balance of the Company’s contract asset and liability as of the periods presented:

(In thousands)	December 31, 2023		March 31, 2023
Contract asset - product returns	$	1,546	$	933
Refund liability	4,628		2,664

4.LEASES

Nature of the Company’s Leases - The Company has operating and finance leases for plants, yards, corporate offices, tractors, trailers and other equipment. The Company’s leases have remaining terms of less than one year to 14 years. A portion of the Company’s yard leases include an option to extend the leases for up to five years. The Company has included renewal options which are reasonably certain to be exercised in its right-of-use assets and lease liabilities.

5.INVENTORIES

Inventories as of the periods presented consisted of the following:

(In thousands)	December 31, 2023		March 31, 2023
Raw materials	$	106,097	$	108,206
Finished goods	299,312		355,788
Total inventories	$	405,409	$	463,994

- 10 -

6.NET INCOME PER SHARE AND STOCKHOLDERS' EQUITY

Net Income per Share - The following table presents information necessary to calculate net income per share for the periods presented, as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands, except per share data)	2023		2022		2023		2022
NET INCOME PER SHARE—BASIC:
Net income available to common stockholders – Basic	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average number of common shares outstanding – Basic	77,857		82,067		78,455		82,891
Net income per common share – Basic	$	1.36	$	1.00	$	5.29	$	5.08
NET INCOME PER SHARE—DILUTED:
Net income available to common stockholders – Diluted	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average number of common shares outstanding – Basic	77,857		82,067		78,455		82,891
Assumed restricted stock	75		114		60		131
Assumed exercise of stock options	595		626		597		702
Assumed performance units	59		180		76		256
Weighted average number of common shares outstanding – Diluted	78,586		82,987		79,188		83,980
Net income per common share – Diluted	$	1.34	$	0.99	$	5.24	$	5.02
Potentially dilutive securities excluded as anti-dilutive	19		42		46		45

7.RELATED PARTY TRANSACTIONS

ADS Mexicana - ADS conducts business in Mexico and Central America through its joint venture, ADS Mexicana, S.A. de C.V. (“ADS Mexicana”). ADS owns 51% of the outstanding stock of ADS Mexicana and consolidates ADS Mexicana for financial reporting purposes.

On June 6, 2022, the Company and ADS Mexicana amended the Intercompany Revolving Credit Promissory Note (the “Intercompany Note”) with a borrowing capacity of $9.5 million. The Intercompany Note matures on June 8, 2027. The Intercompany Note indemnifies the ADS Mexicana joint venture partner for 49% of any unpaid borrowings. The interest rates under the Intercompany Note are determined by certain base rates or Secured Overnight Financing Rate (“SOFR”) plus an applicable margin based on the Leverage Ratio. As of both December 31, 2023 and March 31, 2023, there were no borrowings outstanding under the Intercompany Note.

South American Joint Venture - The Tuberias Tigre - ADS Limitada joint venture (the “South American Joint Venture”) manufactures and sells HDPE corrugated pipe in certain South American markets. ADS owns 50% of the South American Joint Venture. ADS is the guarantor of 50% of the South American Joint Venture’s credit arrangement, and the debt guarantee is shared equally with the joint venture partner. The Company’s maximum potential obligation under this guarantee is $5.5 million as of December 31, 2023. The maximum borrowings permitted under the South American Joint Venture’s credit facility are $11.0 million. The Company does not anticipate any required contributions related to the balance of this credit arrangement. As of December 31, 2023, there was no outstanding principal balance for the South American Joint Venture’s credit facility including letters of credit. As of March 31, 2023, the outstanding principal balances of the South American Joint Venture’s credit facility including letters of credit was $5.5 million.

- 11 -

8.DEBT

Long-term debt as of the periods presented consisted of the following:

(In thousands)	December 31, 2023		March 31, 2023
Term Loan Facility	$	422,000	$	427,250
Senior Notes due 2027	350,000		350,000
Senior Notes due 2030	500,000		500,000
Revolving Credit Facility	—		—
Equipment Financing	12,287		18,638
Total	1,284,287		1,295,888
Less: Unamortized debt issuance costs	10,270		11,804
Less: Current maturities	12,275		14,693
Long-term debt obligations	$	1,261,742	$	1,269,391

Senior Secured Credit Facilities – In May 2022, the Company entered into a Second Amendment (the “Second Amendment”) to the Company's Base Credit Agreement with Barclays Bank PLC, as administrative agent under the Term Loan Facility, PNC Bank, National Association, as new administrative agent under the Revolving Credit Facility. Among other things, the Second Amendment (i) amended the Base Credit Agreement by increasing the Revolving Credit Facility (the “Amended Revolving Credit Facility”) from $350 million to $600 million (including an increase of the sub-limit for the swing-line sub-facility from $50 million to $60 million), (ii) extended the maturity date of the Revolving Credit Facility to May 26, 2027, (iii) revised the “applicable margin” to provide an additional step-down to 175 basis points (for Term Benchmark based loans) and 75 basis points (for base rate loans) in the event the consolidated senior secured net leverage ratio is less than 2.00 to 1.00, and (iv) reset the “incremental amount” and the investment basket in non-guarantors and joint ventures. The Second Amendment also revised the reference interest rate from LIBOR to SOFR for both the Amended Revolving Credit Facility and the Term Loan Facility. Letters of credit outstanding at December 31, 2023 and March 31, 2023 amounted to $11.2 million and $9.7 million, respectively, and reduced the availability of the Revolving Credit Facility.

Senior Notes due 2027 – On September 23, 2019, the Company issued $350.0 million aggregate principal amount of 5.0% Senior Notes due 2027 (the “2027 Notes”) pursuant to an Indenture, dated September 23, 2019 (the “2027 Indenture”), among the Company, the guarantors party thereto (the “Guarantors”) and U.S. Bank National Association, as Trustee (the “Trustee”).

Senior Notes due 2030 – On June 9, 2022, the Company issued $500.0 million aggregate principal amount of 6.375% Senior Notes due 2030 (the “2030 Notes”) pursuant to an Indenture, dated June 9, 2022 (the “2030 Indenture”), among the Company, the Guarantors and the Trustee.

Equipment Financing – The assets under the Equipment Financing acquired are titled to the Company and included in Property, plant and equipment, net on the Company's Condensed Consolidated Balance Sheet. The equipment financing has an initial term of between 12 and 84 months, based on the life of the equipment, and bears a weighted average interest of 1.6% as of December 31, 2023. The current portion of the equipment financing is $5.3 million, and the long-term portion is $7.0 million at December 31, 2023.

Valuation of Debt - The carrying amounts of current financial assets and liabilities approximate fair value because of the immediate or short-term maturity of these items. The following table presents the carrying and fair value of the Company’s 2027 Notes, 2030 Notes and Equipment Financing for the periods presented:

	December 31, 2023				March 31, 2023
(In thousands)	Fair Value		Carrying Value		Fair Value		Carrying Value
Senior Notes due 2027	$	340,883	$	350,000	$	333,970	$	350,000
Senior Notes due 2030	506,075		500,000		496,605		500,000
Equipment Financing	11,940		12,287		17,921		18,638
Total fair value	$	858,898	$	862,287	$	848,496	$	868,638

The fair values of the 2027 Notes and 2030 Notes were determined based on quoted market data for the Company’s 2027 Notes and 2030 Notes, respectively. The fair value of the Equipment Financing was determined based on a comparison of the interest rate and terms of such borrowings to the rates and terms of similar debt available for the

- 12 -

period. The categorization of the framework used to evaluate the 2027 Notes, 2030 Notes and Equipment Financing are considered Level 2. The Company believes the carrying amount of the remaining long-term debt, including the Term Loan Facility and Revolving Credit Facility, is not materially different from its fair value as the interest rates and terms of the borrowings are similar to currently available borrowings.

9.COMMITMENTS AND CONTINGENCIES

Purchase Commitments - The Company has historically secured supplies of resin raw material by agreeing to purchase quantities during a future given period at a fixed price. These purchase contracts typically ranged from 1 to 12 months and occur in the ordinary course of business. The Company does not have any outstanding purchase commitments with fixed price and quantity as of December 31, 2023. The Company also enters into equipment purchase contracts with manufacturers.

Litigation and Other Proceedings – The Company is involved from time to time in various legal proceedings that arise in the ordinary course of business, including but not limited to commercial disputes, environmental matters, employee related claims, intellectual property disputes and litigation in connection with transactions including acquisitions and divestitures. The Company does not believe that such litigation, claims, and administrative proceedings will have a material adverse impact on the Company’s financial position or results of operations. The Company records a liability when a loss is considered probable, and the amount can be reasonably estimated.

10.INCOME TAXES

The Company’s effective tax rate will vary based on a variety of factors, including overall profitability, the geographical mix of income before taxes and related tax rates in jurisdictions where it operates and other one-time charges, as well as the occurrence of discrete events. For the three months ended December 31, 2023 and 2022, the Company utilized an effective tax rate of 22.2% and 24.0%, respectively, to calculate its provision for income taxes. For the nine months ended December 31, 2023 and 2022, the Company utilized an effective tax rate of 24.3% and 23.4%, respectively, to calculate its provision for income taxes. State and local income taxes increased the effective rate for the three and nine months ended December 31, 2023 and 2022. Discrete income tax benefits related to amended state tax returns and the federal return to provision adjustment decreased the effective tax rate for the three months ended December 31, 2023. Additionally, discrete income tax benefit related to the stock-based compensation windfall decreased the effective tax rate for the three and nine months ended December 31, 2022.

11. STOCK-BASED COMPENSATION

ADS has several programs for stock-based payments to employees and non-employee members of its Board of Directors, including stock options, performance-based restricted stock units and restricted stock. The Company recognized stock-based compensation expense in the following line items of the Condensed Consolidated Statements of Operations for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Component of income before income taxes:
Cost of goods sold	$	1,316	$	743	$	3,473	$	2,175
Selling, general and administrative expenses	6,086		5,436		20,163		17,737
Total stock-based compensation expense	$	7,402	$	6,179	$	23,636	$	19,912

The following table summarizes stock-based compensation expense by award type for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Stock-based compensation expense:
Stock Options	$	1,305	$	1,035	$	4,046	$	3,316
Restricted Stock	2,050		1,754		6,131		5,480
Performance-based Restricted Stock Units	3,191		2,827		11,110		9,619
Employee Stock Purchase Plan	313		—		694		—
Non-Employee Directors	543		563		1,655		1,497
Total stock-based compensation expense	$	7,402	$	6,179	$	23,636	$	19,912

- 13 -

2017 Omnibus Incentive Plan - The 2017 Incentive Plan provides for the issuance of a maximum of 5.0 million shares of the Company’s common stock for awards made thereunder, which awards may consist of stock options, restricted stock, restricted stock units, stock appreciation rights, phantom stock, cash-based awards, performance awards (which may take the form of performance cash, performance units or performance shares) or other stock-based awards.

Restricted Stock – During the nine months ended December 31, 2023, the Company granted 0.1 million shares of restricted stock with a grant date fair value of $13.2 million.

Performance-based Restricted Stock Units (“Performance Units”) – During the nine months ended December 31, 2023, the Company granted 0.1 million performance share units at a grant date fair value of $8.7 million.

Options – During the nine months ended December 31, 2023, the Company granted 0.2 million nonqualified stock options under the 2017 Incentive Plan with a grant date fair value of $7.5 million. The Company estimates the fair value of stock options using a Black-Scholes option-pricing model. The following table summarizes the assumptions used to estimate the fair value of stock-options during the period presented:

	Nine Months Ended December 31, 2023
Common stock price	$96.51
Expected stock price volatility	45.6%
Risk-free interest rate	3.8%
Weighted-average expected option life (years)	6
Dividend yield	0.58%

Employee Stock Purchase Plan (“ESPP”) - In July 2022, the Company’s stockholders approved the Advanced Drainage Systems, Inc. Employee Stock Purchase Plan, which provides for a maximum of 0.4 million shares of the Company’s common stock. Eligible employees may purchase the Company's common stock at 85% of the lower of the fair market value of the Company's common stock on the first day or the last day of the offering period. The first offering period commenced July 1, 2023 and ended December 31, 2023. The next offering period will commence January 1, 2024 and will end June 30, 2024.

12.BUSINESS SEGMENTS INFORMATION

The Company operates its business in three distinct reportable segments: “Pipe”, “International” and “Infiltrator.” “Allied Products & Other” represents the Company’s Allied Products and all other business segments. The Chief Operating Decision Maker (the “CODM”) evaluates segment reporting based on Net Sales and Segment Adjusted Gross Profit. The Company calculated Segment Adjusted Gross Profit as Net sales less Costs of goods sold, depreciation and amortization, stock-based compensation and non-cash charges. A measure of assets is not applicable, as segment assets are not regularly reviewed by the CODM for evaluating performance or allocating resources.

- 14 -

The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products for the periods presented:

	Three Months Ended
	December 31, 2023						December 31, 2022
(In thousands)	Net Sales		Intersegment Net Sales		Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	360,733	$	(14,680)	$	346,053	$	375,719	$	(10,839)	$	364,880
Infiltrator	131,144		(27,273)		103,871		103,895		(14,961)		88,934
International
International - Pipe	44,203		(2,369)		41,834		44,882		(5,311)		39,571
International - Allied Products & Other	14,166		(1)		14,165		14,075		—		14,075
Total International	58,369		(2,370)		55,999		58,957		(5,311)		53,646
Allied Products & Other	159,162		(2,718)		156,444		149,044		(1,337)		147,707
Intersegment Eliminations	(47,041)		47,041		—		(32,448)		32,448		—
Total Consolidated	$	662,367	$	—	$	662,367	$	655,167	$	—	$	655,167
	Nine Months Ended
	December 31, 2023						December 31, 2022
(In thousands)	Net Sales		Intersegment Net Sales		Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	1,217,302	$	(36,974)	$	1,180,328	$	1,401,554	$	(31,483)	$	1,370,071
Infiltrator	406,361		(63,405)		342,956		420,920		(66,317)		354,603
International
International - Pipe	133,787		(3,917)		129,870		154,762		(18,509)		136,253
International - Allied Products & Other	46,789		(27)		46,762		49,172		—		49,172
Total International	180,576		(3,944)		176,632		203,934		(18,509)		185,425
Allied Products & Other	528,303		(7,586)		520,717		550,153		(6,690)		543,463
Intersegment Eliminations	(111,909)		111,909		—		(122,999)		122,999		—
Total Consolidated	$	2,220,633	$	—	$	2,220,633	$	2,453,562	$	—	$	2,453,562

- 15 -

The following sets forth certain financial information attributable to the reportable segments for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Segment Adjusted Gross Profit
Pipe	$	115,621	$	106,279	$	402,126	$	421,011
Infiltrator	68,392		46,497		216,319		193,569
International	14,012		13,342		51,380		51,456
Allied Products & Other	88,150		78,401		300,574		293,472
Intersegment Eliminations	(1,922)		714		(4,431)		329
Total	$	284,253	$	245,233	$	965,968	$	959,837
Depreciation and Amortization
Pipe	$	15,491	$	12,754	$	43,882	$	38,754
Infiltrator	5,543		5,120		16,435		15,014
International	1,195		1,369		3,669		4,023
Allied Products & Other(a)	15,824		16,603		48,028		49,555
Total	$	38,053	$	35,846	$	112,014	$	107,346
Capital Expenditures
Pipe	$	31,287	$	28,268	$	84,700	$	75,565
Infiltrator	2,962		12,810		14,458		33,856
International	1,872		2,366		4,807		4,393
Allied Products & Other(a)	17,639		7,869		32,420		13,044
Total	$	53,760	$	51,313	$	136,385	$	126,858

(a)Includes depreciation, amortization and capital expenditures not allocated to a reportable segment. The amortization expense of Infiltrator intangible assets is included in Allied Products & Other.

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Reconciliation of Segment Adjusted Gross Profit:
Total Gross Profit	$	259,849	$	223,917	$	893,986	$	895,987
Depreciation and Amortization	23,088		20,573		68,509		61,675
Stock-based compensation expense	1,316		743		3,473		2,175
Total Segment Adjusted Gross Profit	$	284,253	$	245,233	$	965,968	$	959,837

13.SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION

Supplemental disclosures of cash flow information for the nine months ended December 31 were as follows:

(In thousands)	2023		2022
Cash paid for income taxes	$	114,712	$	136,320
Cash paid for interest	51,484		24,757
Non-cash operating, investing and financing activities:
Repurchase of common stock pending settlement	1,139		—
Share repurchase excise tax accrual	1,486		—
Acquisition of property, plant and equipment under finance lease	21,061		10,684
Balance in accounts payable for the acquisition of property, plant and equipment	22,925		14,748

- 16 -

14.SUBSEQUENT EVENTS

Common Stock Dividend - Subsequent to the end of the quarter, the Company declared a quarterly cash dividend of $0.14 per share of common stock. The dividend is payable on March 15, 2024, to stockholders of record at the close of business on March 1, 2024.

Share Repurchase Program - Subsequent to the end of the quarter, 0.1 million shares of common stock at a cost of $13.1 million were repurchased under the Board of Directors' authorization in February 2022.

- 17 -

Item 2.         Management’s Discussion and Analysis of Financial Condition and Results of Operations

Unless the context otherwise indicates or requires, as used in this Quarterly Report on Form 10-Q ("Form 10-Q"), the terms “we,” “our,” “us,” “ADS” and the “Company” refer to Advanced Drainage Systems, Inc. and its directly- and indirectly-owned subsidiaries as a combined entity, except where it is clear that the terms mean only Advanced Drainage Systems, Inc. exclusive of its subsidiaries. We consolidate our joint ventures for purposes of GAAP, except for our South American Joint Venture.

Our fiscal year begins on April 1 and ends on March 31. Unless otherwise noted, references to “year” pertain to our fiscal year. For example, 2024 refers to fiscal 2024, which is the period from April 1, 2023 to March 31, 2024.

The following discussion and analysis of the financial condition and results of our operations should be read in conjunction with our Condensed Consolidated Financial Statements and related footnotes included elsewhere in this Form 10-Q and with the audited Consolidated Financial Statements included in our Fiscal 2023 Form 10-K, as filed with the Securities and Exchange Commission (the “SEC”) on May 18, 2023. In addition to historical condensed consolidated financial information, the following discussion contains forward-looking statements that reflect our plans, estimates and beliefs. Our actual results could differ materially from those discussed in the forward-looking statements. This discussion contains forward-looking statements that are based on the beliefs of our management, as well as assumptions made by, and information currently available to, our management. Our actual results could differ materially from those discussed in the forward-looking statements. For more information, see the section below entitled “Forward Looking Statements.”

Overview

ADS is the leading manufacturer of innovative water management solutions in the stormwater and onsite septic wastewater industries, providing superior drainage solutions for use in the construction and agriculture marketplaces. Our innovative products, for which we hold many patents, are used across a broad range of end markets and applications, including non-residential, infrastructure and agriculture applications. We have established a leading position in many of these end markets by leveraging our national sales and distribution platform, industry-acclaimed engineering support, overall product breadth and scale plus manufacturing excellence.

Executive Summary

Third Quarter Fiscal 2024 Results

•Net sales increased 1.1% to $662.4 million

•Net income increased 28.5% to $106.9 million

•Net income per diluted share increased 35.4% to $1.34

•Adjusted EBITDA, a non-GAAP measure, increased 20.3% to $204.2 million

Net sales increased $7.2 million, or 1.1%, to $662.4 million, as compared to $655.2 million in the prior year quarter. Domestic pipe sales decreased $18.8 million, or 5.2%, to $346.1 million. Domestic allied products & other sales increased $8.7 million, or 5.9%, to $156.4 million. Infiltrator sales increased $14.9 million, or 16.8%, to $103.9 million. The overall increase in domestic net sales was primarily driven by the improvement in the U.S. residential and infrastructure construction end markets. International sales increased $2.4 million, or 4.4%, to $56.0 million.

Gross profit increased $35.9 million, or 16.0%, to $259.8 million as compared to $223.9 million in the prior year. The increase in gross profit is primarily due to favorable material cost and sales mix.

Adjusted EBITDA, a non-GAAP measure, increased $34.5 million, or 20.3%, to $204.2 million, as compared to $169.7 million in the prior year. As a percentage of Net sales, Adjusted EBITDA was 30.8% as compared to 25.9% in the prior year.

Year-to-date Fiscal 2024 Results

•Net sales decreased 9.5% to $2,220.6 million

•Net income decreased 1.7% to $417.8 million

•Net income per diluted share increased 4.4% to $5.24

•Adjusted EBITDA, a non-GAAP measure, remained flat at $731.8 million

•Cash provided by operating activities increased 6.0% to $700.3 million

•Free cash flow, a non-GAAP measure, increased 5.7% to $563.9 million

Net sales decreased $232.9 million, or 9.5%, to $2,220.6 million, as compared to $2,453.6 million in the prior period. Domestic pipe sales decreased $189.7 million, or 13.8%, to $1,180.3 million. Domestic allied products & other sales decreased $22.7 million, or 4.2%, to $520.7 million. Infiltrator sales decreased $11.6 million, or 3.3%, to $343.0 million.

- 18 -

The decrease in domestic net sales was driven by lower demand in the U.S. construction and agriculture end markets. International sales decreased $8.8 million, or 4.7%, to $176.6 million.

Gross profit decreased $2.0 million, or 0.2%, to $894.0 million as compared to $896.0 million in the prior year. The decrease in gross profit is primarily due to the decrease in volume and unfavorable fixed cost absorption, partially offset by favorable material costs.

Adjusted EBITDA, a non-GAAP measure, decreased $0.2 million to $731.8 million, as compared to $732.0 million in the prior year. The decrease is primarily due to the factors mentioned above. As a percentage of net sales, Adjusted EBITDA was 33.0% as compared to 29.8% in the prior year.

Results of Operations

Comparison of the Three Months Ended December 31, 2023 to the Three Months Ended December 31, 2022

The following table summarizes our operating results as a percentage of Net sales that have been derived from our Condensed Consolidated Financial Statements for the periods presented. We believe this presentation is useful to investors in comparing historical results.

Consolidated Statements of Operations data:	For the Three Months Ended December 31,
(In thousands)	2023				2022
Net sales	$	662,367	100.0	%	$	655,167	100.0	%
Cost of goods sold	402,518		60.8		431,250		65.8
Gross profit	259,849		39.2		223,917		34.2
Selling, general and administrative	91,289		13.8		85,936		13.1
Loss (gain) on disposal of assets and costs from exit and disposal activities	2,512		0.4		(348)		(0.1)
Intangible amortization	12,782		1.9		13,842		2.1
Income from operations	153,266		23.1		124,487		19.0
Interest expense	22,331		3.4		20,001		3.1
Derivative gain and other income, net	(4,772)		(0.7)		(4,125)		(0.6)
Income before income taxes	135,707		20.5		108,611		16.6
Income tax expense	30,131		4.5		26,068		4.0
Equity in net income of unconsolidated affiliates	(1,304)		(0.2)		(639)		(0.1)
Net income	106,880		16.1		83,182		12.7
Less: net income attributable to noncontrolling interest	1,241		0.2		1,142		0.2
Net income attributable to ADS	$	105,639	15.9	%	$	82,040	12.5	%

Net sales - The following table presents Net sales to external customers by reportable segment for the three months ended December 31, 2023 and 2022.

(Amounts in thousands)	2023		2022		$ Variance		% Variance
Pipe	$	346,053	$	364,880	$	(18,827)	(5.2)	%
Infiltrator	103,871		88,934		14,937		16.8
International	55,999		53,646		2,353		4.4
Allied Products & Other	156,444		147,707		8,737		5.9
Total Consolidated	$	662,367	$	655,167	$	7,200	1.1	%

Our consolidated Net sales for the three months ended December 31, 2023 increased by $7.2 million, or 1.1%, compared to the same period in fiscal 2023. The overall increase in domestic net sales was primarily driven by the improvement in the U.S. residential and infrastructure construction end markets which resulted in volume growth for Infiltrator and Allied Products & Other.

- 19 -

Cost of goods sold and Gross profit - The following table presents gross profit by reportable segment for the three months ended December 31, 2023 and 2022.

(Amounts in thousands)	2023		2022		$ Variance		% Variance
Pipe	$	99,567	$	92,816	$	6,751	7.3	%
Infiltrator	62,780		41,345		21,435		51.8
International	12,817		11,881		936		7.9
Allied Products & Other	86,606		77,161		9,445		12.2
Intersegment eliminations	(1,921)		714		(2,635)		(369.0)
Total gross profit	$	259,849	$	223,917	$	35,932	16.0	%

Our consolidated Cost of goods sold for the three months ended December 31, 2023 decreased by $28.7 million, or 6.7%, and our consolidated Gross profit increased by $35.9 million, or 16.0%, compared to the same period in fiscal 2023. The increase in our gross profit was primarily due to favorable material costs and sales mix. Manufacturing costs benefited from investments in in equipment, automation and tooling.

Selling, general and administrative expenses

	Three Months Ended December 31,
(Amounts in thousands)	2023			2022
Selling, general and administrative expenses	$	91,289		$	85,936
% of Net sales	13.8		%	13.1		%

Selling, general and administrative expenses for three months ended December 31, 2023 increased from the same period in fiscal 2023 and as a percentage of sales, increased by 0.7%. The increase in Selling, general and administrative expenses is result of the investment in our engineering and innovation initiatives as well as the impact of inflation.

Interest expense - Interest expense increased $2.3 million in the three months ended December 31, 2023 compared to the same period in the previous fiscal year. The increase was primarily due to an increase in interest rates.

Derivative gains and other income, net - Derivative gains and other income increased by $0.6 million for the three months ended December 31, 2023 compared to the same period in the previous fiscal year primarily due to increased interest income.

Income tax expense - The following table presents the effective tax rates for the periods presented:

	Three Months Ended December 31,
	2023		2022
Effective tax rate	22.2	%	24.0	%

The change in the effective tax rate for the three months ended December 31, 2023 was primarily related to the discrete income tax benefits for the amended state tax returns and the federal return to provision adjustment. See “Note 10. Income Taxes” for additional information.

- 20 -

Comparison of the Nine Months Ended December 31, 2023 to the Nine Months Ended December 31, 2022

The following table summarizes our operating results as a percentage of net sales that have been derived from our Condensed Consolidated Financial Statements for the periods presented. We believe this presentation is useful to investors in comparing historical results.

	For the Nine Months Ended December 31,
	2023				2022
Consolidated Statements of Operations data:	(In thousands)
Net sales	$	2,220,633	100.0	%	$	2,453,562	100.0	%
Cost of goods sold	1,326,647		59.7		1,557,575		63.5
Gross profit	893,986		40.3		895,987		36.5
Selling, general and administrative	269,525		12.1		261,095		10.6
(Gain) loss on disposal of assets and costs from exit and disposal activities	(10,669)		(0.5)		(147)		—
Intangible amortization	38,376		1.7		41,360		1.7
Income from operations	596,754		26.9		593,679		24.2
Interest expense	65,984		3.0		49,334		2.0
Derivative gain and other income, net	(15,827)		(0.7)		(5,632)		(0.2)
Income before income taxes	546,597		24.6		549,977		22.4
Income tax expense	132,665		6.0		128,641		5.2
Equity in net income of unconsolidated affiliates	(3,880)		(0.2)		(3,705)		(0.2)
Net income	417,812		18.8		425,041		17.3
Less: net income attributable to noncontrolling interest	2,719		0.1		3,848		0.2
Net income attributable to ADS	$	415,093	18.7	%	$	421,193	17.2	%

Net sales - The following table presents Net sales to external customers by reportable segment for the nine months ended December 31, 2023 and 2022.

(Amounts in thousands)	2023		2022		$ Variance		% Variance
Pipe	$	1,180,328	$	1,370,071	$	(189,743)	(13.8)	%
Infiltrator	342,956		354,603		(11,647)		(3.3)
International	176,632		185,425		(8,793)		(4.7)
Allied Products & Other	520,717		543,463		(22,746)		(4.2)
Total Consolidated	$	2,220,633	$	2,453,562	$	(232,929)	(9.5)	%

Our consolidated Net sales for the nine months ended December 31, 2023 decreased by $232.9 million, or 9.5%, compared to the same period in fiscal 2023. The decrease in domestic net sales was driven by lower demand in the U.S. construction and agriculture end markets.

Cost of goods sold and Gross profit - The following table presents gross profit by reportable segment for the nine months ended December 31, 2023 and 2022.

(Amounts in thousands)	2023		2022		$ Variance		% Variance
Pipe	$	355,016	$	380,199	$	(25,183)	(6.6)	%
Infiltrator	199,685		178,438		21,247		11.9
International	47,711		47,253		458		1.0
Allied Products & Other	296,004		289,768		6,236		2.2
Intersegment eliminations	(4,430)		329		(4,759)		(1,446.5)
Total gross profit	$	893,986	$	895,987	$	(2,001)	(0.2)	%

Our consolidated Cost of goods sold for the nine months ended December 31, 2023 decreased by $230.9 million, or 14.8%, and our consolidated Gross profit decreased by $2.0 million, or 0.2%, compared to the same period in fiscal 2023. The

- 21 -

decrease in gross profit is primarily due to the decrease in volume and unfavorable fixed cost absorption, partially offset by favorable material costs.

Selling, general and administrative expenses

	Nine Months Ended December 31,
(Amounts in thousands)	2023			2022
Selling, general and administrative expenses	$	269,525		$	261,095
% of Net sales	12.1		%	10.6		%

Selling, general and administrative expenses for nine months ended December 31, 2023 increased $8.4 million from the same period in fiscal 2023 and as a percentage of sales, increased by 1.5%. The increase in Selling, general and administrative expenses is result of the investment in our engineering and innovation initiatives as well as the impact of inflation.

Loss (gain) on disposal of assets and costs from exit and disposal activities - The gain on disposal of assets in the current year was due to the sale of Spartan Concrete.

Interest expense - Interest expense increased $16.7 million in the nine months ended December 31, 2023 compared to the same period in the previous fiscal year. The increase was primarily due to increased average debt levels and increased interest rates.

Derivative gains and other income, net - Derivative gains and other income increased by $10.2 million for the nine months ended December 31, 2023 compared to the same period in the previous fiscal year primarily due to increased interest income.

Income tax expense - The following table presents the effective tax rates for the nine months ended December 31, 2023 and 2022.

	Nine Months Ended December 31,
	2023		2022
Effective tax rate	24.3	%	23.4	%

The change in the effective tax rate for the nine months ended December 31, 2023 was primarily related to the decrease of the discrete income tax benefit related to the stock-based compensation windfall. See “Note 10. Income Taxes” for additional information.

Adjusted EBITDA and Adjusted EBITDA Margin - Adjusted EBITDA and Adjusted EBITDA Margin, which are non-GAAP financial measures, have been presented in this Form 10-Q as supplemental measures of financial performance that are not required by, or presented in accordance with GAAP and should not be considered as alternatives to net income as measures of financial performance or cash flows from operations or any other performance measure derived in accordance with GAAP. We calculate Adjusted EBITDA as net income before interest, income taxes, depreciation and amortization, stock-based compensation expense, non-cash charges and certain other expenses. We calculate Adjusted EBITDA Margin as Adjusted EBITDA divided by net sales.

Adjusted EBITDA and Adjusted EBITDA Margin are included in this Form 10-Q because they are key metrics used by management and our board of directors to assess our consolidated financial performance. These non-GAAP financial measures are frequently used by analysts, investors and other interested parties to evaluate companies in our industry. In addition to covenant compliance and executive performance evaluations, we use these non-GAAP financial measures to supplement GAAP measures of performance to evaluate the effectiveness of our consolidated business strategies, to make budgeting decisions and to compare our performance against that of other peer companies using similar measures. We use Adjusted EBITDA Margin to evaluate our ability to generate profitable sales.

Adjusted EBITDA and Adjusted EBITDA Margin contain certain other limitations, including the failure to reflect our cash expenditures, cash requirements for working capital needs, cash expenditures to replace assets being depreciated and amortized and interest expense, or the cash requirements necessary to service interest on principal payments on our indebtedness. In evaluating Adjusted EBITDA and Adjusted EBITDA Margin, you should be aware that in the future we will incur expenses that are the same as or similar to some of the adjustments in this presentation, such as stock-based compensation expense, derivative fair value adjustments, and foreign currency transaction losses. Management compensates for these limitations by relying on our GAAP results and using non-GAAP measures on a supplemental basis.

- 22 -

The following table presents a reconciliation of Adjusted EBITDA to Net income, the most comparable GAAP measure, for each of the periods presented.

	Three Months Ended December 31,						Nine Months Ended December 31,
(In thousands)	2023			2022			2023			2022
Net income	$	106,880		$	83,182		$	417,812		$	425,041
Depreciation and amortization	38,053			35,846			112,014			107,346
Interest expense	22,331			20,001			65,984			49,334
Income tax expense	30,131			26,068			132,665			128,641
EBITDA	197,395			165,097			728,475			710,362
Loss (gain) on disposal of assets and costs from exit and disposal activities	2,512			(348)			(10,669)			(147)
Stock-based compensation expense	7,402			6,179			23,636			19,912
Transaction costs(a)	1,030			1,334			3,054			3,417
Interest income	(6,515)			(3,834)			(15,141)			(5,942)
Other adjustments(b)	2,382			1,309			2,414			4,380
Adjusted EBITDA	$	204,206		$	169,737		$	731,769		$	731,982
Adjusted EBITDA Margin	30.8		%	25.9		%	33.0		%	29.8		%

(a)Represents expenses recorded related to legal, accounting and other professional fees incurred in connection with business or asset acquisitions and dispositions.

(b)Includes derivative fair value adjustments, foreign currency transaction (gains) losses, the proportionate share of interest, income taxes, depreciation and amortization related to the South American Joint Venture, which is accounted for under the equity method of accounting and executive retirement expense.

Liquidity and Capital Resources

Historically we have funded our operations through internally generated cash flow supplemented by debt financings, equity issuance and finance and operating leases. These sources have been sufficient historically to fund our primary liquidity requirements, including working capital, capital expenditures, debt service and dividend payments for our common stock. From time to time, we may explore additional financing methods and other means to raise capital. There can be no assurance that any additional financing will be available to us on acceptable terms or at all.

Free Cash Flow - Free cash flow is a non-GAAP financial measure that comprises cash flow from operations less capital expenditures and is used by management and our Board of Directors to assess our ability to generate cash. Accordingly, free cash flow has been presented as a supplemental measure of liquidity that is not required by, or presented in accordance with GAAP, because management believes that free cash flow provides useful information to investors and others in understanding and evaluating our ability to generate cash flow from operations after capital expenditures. Free cash flow is not a GAAP measure of our liquidity and should not be considered as an alternative to cash flow from operating activities as a measure of liquidity or any other liquidity measure derived in accordance with GAAP. Our measure of free cash flow is not necessarily comparable to other similarly titled captions of other companies due to different methods of calculation.

The following table presents a reconciliation of free cash flow to cash provided by operating activities, the most comparable GAAP measure, for each of the periods presented:

	Nine Months Ended December 31,
(Amounts in thousands)	2023		2022
Net cash provided by operating activities	$	700,262	$	660,438
Capital expenditures	(136,385)		(126,858)
Free Cash Flow	$	563,877	$	533,580

- 23 -

The following table presents key liquidity metrics utilized by management including the leverage ratio which is calculated as net debt divided by the trailing twelve months Adjusted EBITDA:

(Amounts in thousands)	December 31, 2023
Total debt (debt and finance lease obligations)	$	1,324,808
Cash	560,744
Net debt (total debt less cash)	764,064
Leverage Ratio	0.8

The following table summarizes our available liquidity for the period presented:

(Amounts in thousands)	December 31, 2023
Revolver capacity	$	600,000
Less: outstanding borrowings	—
Less: letters of credit	(11,150)
Revolver available liquidity	$	588,850

In addition to the available liquidity above, we have the ability to borrow up to $1.3 billion under our Senior Secured Credit Facility, subject to leverage ratio restrictions.

Working Capital and Cash Flows

As of December 31, 2023, we had $1,149.6 million in liquidity, including $560.7 million of cash, $588.9 million in borrowings available under our Revolving Credit Agreement, net of outstanding letters of credit. We believe that our cash on hand, together with the availability of borrowings under our Credit Agreement and other financing arrangements and cash generated from operations, will be sufficient to meet our working capital requirements, anticipated capital expenditures, and scheduled principal and interest payments on our indebtedness for at least the next twelve months.

Working Capital - Working capital increased to $829.3 million as of December 31, 2023, from $638.7 million as of March 31, 2023. The increase in working capital is primarily due to an increase in cash partially offset by a decrease in accounts receivable and inventory due to seasonality and an increase in accrued liabilities and accrued taxes due to the timing of payments.

	Nine Months Ended December 31,
(Amounts in thousands)	2023		2022
Net cash provided by operating activities	$	700,262	$	660,438
Net cash used in investing activities	(115,879)		(174,822)
Net cash (used in) provided by financing activities	(236,436)		(78,590)

Operating Cash Flows – Cash flows from operating activities increased $39.8 million during the nine months ended December 31, 2023 primarily driven by changes in net working capital.

Investing Cash Flows - Cash flows used in investing activities during the nine months ended December 31, 2023 decreased by $58.9 million compared to the same period in fiscal 2023. The decrease in cash used in investing activities was primarily due to the acquisition of Cultec, Inc. in fiscal 2023.

Capital expenditures totaled $136.4 million and $126.9 million for the nine months ended December 31, 2023 and 2022, respectively. Our capital expenditures for the nine months ended December 31, 2023 were used primarily to support facility expansions, equipment replacements and technology improvement initiatives.

We currently anticipate that we will make capital expenditures of approximately $200 million in fiscal year 2024, including approximately $125 million of open orders as of December 31, 2023. Such capital expenditures are expected to be financed using funds generated by operations.

Financing Cash Flows - During the nine months ended December 31, 2023, cash used in financing activities included the repurchase of common stock of $178.2 million, $33.1 million of dividend payments, and $8.9 million for shares withheld for tax purposes.

- 24 -

During the nine months ended December 31, 2022, cash provided by financing activities included the issuance of $500.0 million of 2030 Notes and proceeds of $123.2 million on our revolving credit facilities. Cash used in financing activities during the nine months ended December 31, 2022 included repurchase of common stock of $375.0 million, payments of $237.5 million on our revolving credit facilities, $30.1 million of dividend payments, and $28.7 million for shares withheld for tax purposes.

Cash held by Foreign Subsidiaries - As of December 31, 2023, we had $39.7 million in cash that was held by our foreign subsidiaries, including $24.5 million held by our Canadian subsidiaries. We continue to evaluate our strategy regarding foreign cash, but our earnings in foreign subsidiaries still remain indefinitely reinvested, except for Canada. We plan to repatriate earnings from Canada and believe that there will be no additional tax costs associated with the repatriation of such earnings other than any potential non-U.S. withholding taxes.

Financing Transactions - There have been no changes in our debt disclosures from those disclosed in “Liquidity and Capital Resources” in our Fiscal 2023 Form 10-K. We are in compliance with our debt covenants as of December 31, 2023.

Off-Balance Sheet Arrangements

Excluding the guarantees of 50% of certain debt of our unconsolidated South American Joint Venture as further discussed in “Note 7. Related Party Transactions” to the Condensed Consolidated Financial Statements, we do not have any other off-balance sheet arrangements. As of December 31, 2023, our South American Joint Venture had approximately no outstanding debt subject to our guarantees. We do not believe that this guarantee will have a current or future effect on our financial condition, results of operations, liquidity or capital resources.

Critical Accounting Policies and Estimates

There have been no changes in critical accounting policies from those disclosed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Fiscal 2023 Form 10-K, except as disclosed in "Note 1. Background and Summary of Significant Accounting Policies.”

Forward-Looking Statements

This Form 10-Q includes forward-looking statements. Some of the forward-looking statements can be identified by the use of terms such as “believes,” “expects,” “may,” “will,” “would,” “should,” “could,” “seeks,” “predict,” “potential,” “continue,” “intends,” “plans,” “projects,” “estimates,” “anticipates” or other comparable terms. These forward-looking statements include all matters that are not related to present facts or current conditions or that are not historical facts. They appear in a number of places throughout this Form 10-Q and include statements regarding our intentions, beliefs or current expectations concerning, among other things, our consolidated results of operations, financial condition, liquidity, prospects, growth strategies, and the industries in which we operate and include, without limitation, statements relating to our future performance.

Forward-looking statements are subject to known and unknown risks and uncertainties, many of which are beyond our control. We caution you that forward-looking statements are not guarantees of future performance and that our actual consolidated results of operations, financial condition, liquidity and industry development may differ materially from those made in or suggested by the forward-looking statements contained in this Form 10-Q. In addition, even if our actual consolidated results of operations, financial condition, liquidity and industry development are consistent with the forward-looking statements contained in this Form 10-Q, those results or developments may not be indicative of results or developments in subsequent periods. A number of important factors could cause actual results to differ materially from those contained in or implied by the forward-looking statements, including those reflected in forward-looking statements relating to our operations and business, the risks and uncertainties discussed in this Form 10-Q (including under the headings “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations”), and those described from time to time in our other filings with the SEC. Factors that could cause actual results to differ from those reflected in forward-looking statements relating to our operations and business include:

•fluctuations in the price and availability of resins and other raw materials and our ability to pass any increased costs of raw materials on to our customers in a timely manner;

•disruption or volatility in general business and economic conditions in the markets in which we operate;

•cyclicality and seasonality of the non-residential and residential construction markets and infrastructure spending;

•the risks of increasing competition in our existing and future markets;

•uncertainties surrounding the integration and realization of anticipated benefits of acquisitions;

•the effect of any claims, litigation, investigations or proceedings, including those described under “Item 1. Legal Proceedings” of this Form 10-Q;

•the effect of weather or seasonality;

•the loss of any of our significant customers;

- 25 -

•the risks of doing business internationally;

•the risks of conducting a portion of our operations through joint ventures;

•our ability to expand into new geographic or product markets;

•the risk associated with manufacturing processes;

•the effect of global climate change;

•cybersecurity risks;

•our ability to manage our supply purchasing and customer credit policies;

•our ability to control labor costs and to attract, train and retain highly qualified employees and key personnel;

•our ability to protect our intellectual property rights;

•changes in laws and regulations, including environmental laws and regulations;

•the risks associated with our current levels of indebtedness, including borrowings under our existing credit agreement and outstanding indebtedness under our existing senior notes; and

•other risks and uncertainties, including those listed under “Item 1A. Risk Factors” in the Fiscal 2023 Form 10-K.

All forward-looking statements are made only as of the date of this report and we do not undertake any obligation, other than as may be required by law, to update or revise any forward-looking statements to reflect future events or developments. Comparisons of results for current and any prior periods are not intended to express any future trends, or indications of future performance, unless expressed as such, and should only be viewed as historical data.

Item 3.         Quantitative and Qualitative Disclosures about Market Risk

We are subject to various market risks, primarily related to changes in interest rates, credit, raw material supply prices and, to a lesser extent, foreign currency exchange rates. Our financial position, results of operations or cash flows may be negatively impacted in the event of adverse movements in the respective market rates or prices in each of these risk categories. Our exposure in each category is limited to those risks that arise in the normal course of business, as we do not engage in speculative, non-operating transactions. Our exposure to market risk has not materially changed from what we previously disclosed in Part II. Item 7A. “Quantitative and Qualitative Disclosures about Market Risk” of our Fiscal 2023 Form 10-K except as disclosed below.

Interest Rate Risk - We are subject to interest rate risk associated with our bank debt. A 1.0% increase in interest rates on our variable-rate debt would increase our annual forecasted interest expense by approximately $4.2 million based on our borrowings as of December 31, 2023. Assuming the Revolving Credit Facility is fully drawn, each 1.0% increase or decrease in the applicable interest rate would change our interest expense by approximately $10.2 million, for the twelve months ended December 31, 2023.

Item 4.         Controls and Procedures

Evaluation of Disclosure Controls and Procedures - The Company’s Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”) are responsible for evaluating the effectiveness of our disclosure controls and procedures as defined in the Securities Exchange Act of 1934, as amended (the “Exchange Act”), rules 13a-15(e) and 15d-15(e). The Company’s disclosure controls and procedures are designed to provide reasonable assurance that the information required to be disclosed in the Company’s reports under the Exchange Act, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to management, including the Company’s CEO and CFO, as appropriate to allow timely decisions regarding required disclosure. Management recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable assurance of achieving their objectives, and management necessarily applies its judgment in evaluating the cost-benefit relationship of possible controls and procedures.

Based on the evaluation of our disclosure controls and procedures, our CEO and CFO concluded that the Company’s disclosure controls and procedures were effective as of the end of the period covered by this report.

Changes in Internal Control over Financial Reporting - There were no changes in the Company’s internal control over financial reporting as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act that occurred during the three months ended December 31, 2023 that has materially affected, or is reasonably likely to materially affect, internal control over financial reporting.

- 26 -

PART II. OTHER INFORMATION

Item 1.         Legal Proceedings

The Company is involved from time to time in various legal proceedings that arise in the ordinary course of business, including but not limited to commercial disputes, environmental matters, employee related claims, intellectual property disputes and litigation in connection with transactions including acquisitions and divestitures. The Company does not believe that such litigation, claims, and administrative proceedings will have a material adverse impact on the Company’s financial position or results of operations.

Please see “Note 9. Commitments and Contingencies,” of the Condensed Consolidated Financial Statements of this Form 10-Q for more information regarding legal proceedings.

Item 1A.     Risk Factors

Important risk factors that could affect our operations and financial performance, or that could cause results or events to differ from current expectations, are described in “Part I, Item 1A — Risk Factors” of our Fiscal 2023 Form 10-K. These factors are further supplemented by those discussed in “Part II, Item 7A — Quantitative and Qualitative Disclosures about Market Risk” of our Fiscal 2023 Form 10-K and in “Part I, Item 3 — Quantitative and Qualitative Disclosures about Market Risk” and “Part II, Item 1 — Legal Proceedings” of this Form 10-Q.

Item 2.        Unregistered Sale of Equity Securities and Use of Proceeds

In February 2022, our Board of Directors authorized a $1.0 billion common stock repurchase program. Repurchase of common stock will be made in accordance with applicable securities laws. During the three months ended December 31, 2023, the Company repurchased 0.6 million shares of common stock at a cost of $70.3 million. As of December 31, 2023, approximately $245.6 million of common stock may be repurchased under the authorization. The stock repurchase program does not obligate us to acquire any particular amount of common stock and may be suspended or terminated at any time at our discretion.

The following table provides information with respect to repurchases of our common stock by us and our “affiliated purchasers” (as defined by Rule 10b-18(a)(3) under the Exchange Act) during the three months ended December 31, 2023:

Period	Total Number of Shares Purchased	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plan	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Plan
	(amounts in thousands, except per share data)
October 1, 2023 to October 31, 2023	339	$	114.21	339	$	277,184
November 1, 2023 to November 30, 2023	175	115.90		175	256,937
December 1, 2023 to December 31, 2023	84	133.29		84	245,648
Total	598	$	117.40	598	$	245,648

Item 3.        Defaults Upon Senior Securities

None.

Item 4.        Mine Safety Disclosures

Not applicable.

Item 5.        Other Information

None.

- 27 -

Item 6. Exhibits

The following exhibits are filed herewith or incorporated herein by reference.

Exhibit Number	Exhibit Description
31.1*	Certification of President and Chief Executive Officer of Advanced Drainage Systems, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*	Certification of Executive Vice President and Chief Financial Officer of Advanced Drainage Systems, Inc. pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*	Certification of Principal Executive Officer of Advanced Drainage Systems, Inc. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2*	Certification of Principal Financial Officer of Advanced Drainage Systems, Inc. pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS*	Inline 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*	Inline XBRL Taxonomy Extension Schema.
101.CAL*	Inline XBRL Taxonomy Extension Calculation Linkbase.
101.DEF*	Inline XBRL Taxonomy Extension Definition Linkbase.
101.LAB*	Inline XBRL Taxonomy Extension Label Linkbase.
101.PRE*	Inline XBRL Taxonomy Extension Presentation Linkbase.
104	The cover page for the Company’s Quarterly Report on Form 10-Q for the quarter ended December 31, 2023, has been formatted in Inline XBRL and contained in Exhibit 101.

* Filed herewith

- 28 -

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.

Date: February 8, 2024

ADVANCED DRAINAGE SYSTEMS, INC.
By:	/s/ D. Scott Barbour
	D. Scott Barbour
	President and Chief Executive Officer
	(Principal Executive Officer)
By:	/s/ Scott A. Cottrill
	Scott A. Cottrill
	Executive Vice President, Chief Financial Officer and Secretary
	(Principal Financial Officer)
By:	/s/ Tim A. Makowski
	Tim A. Makowski
	Vice President, Controller, and Chief Accounting Officer

- 29 -

EX-31.1

Exhibit 31.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

I, D. Scott Barbour, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q (this “Report”) of the registrant, Advanced Drainage Systems, 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 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 15(d)-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; and

5.The registrant’s other certifying officer 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 the registrant’s board of directors (or persons performing the equivalent functions):

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.

Date: February 8, 2024

By:	/s/ D. Scott Barbour
D. Scott Barbour
President and Chief Executive Officer
(Principal Executive Officer)

EX-31.2

Exhibit 31.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

I, Scott A. Cottrill, certify that:

1.I have reviewed this Quarterly Report on Form 10-Q (this “Report”) of the registrant, Advanced Drainage Systems, 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 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 15(d)-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; and

5.The registrant’s other certifying officer 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 the registrant’s board of directors (or persons performing the equivalent functions):

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.

Date: February 8, 2024

By:	/s/ Scott A. Cottrill
Scott A. Cottrill
Executive Vice President,
Chief Financial Officer and
Secretary
(Principal Financial Officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned hereby certifies, pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, and in accordance with 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as the principal executive officer of Advanced Drainage Systems, Inc. (the “Company”), that, to the best of his knowledge, the Quarterly Report on Form 10-Q of the Company for the quarter ended December 31, 2023 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such report.

February 8, 2024

/s/ D. Scott Barbour

D. Scott Barbour

President and Chief Executive Officer

(Principal Executive Officer)

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate document. A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

The undersigned hereby certifies, pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended, and in accordance with 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, in his capacity as the principal financial officer of Advanced Drainage Systems, Inc. (the “Company”), that, to the best of his knowledge, the Quarterly Report on Form 10-Q of the Company for the quarter ended December 31, 2023 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, and that the information contained in such report fairly presents, in all material respects, the financial condition and results of operations of the Company as of the dates and for the periods presented in the financial statements included in such report.

February 8, 2024

/s/ Scott A. Cottrill

Scott A. Cottrill

Chief Financial Officer

(Principal Financial Officer)

The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate document. A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover - shares	9 Months Ended
	Dec. 31, 2023	Jan. 31, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	001-36557
Entity Registrant Name	ADVANCED DRAINAGE SYSTEMS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	51-0105665
Entity Address, Address Line One	4640 Trueman Boulevard
Entity Address, City or Town	Hilliard
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43026
City Area Code	614
Local Phone Number	658-0050
Title of each class	Common Stock, $0.01 par value per share
Trading Symbol(s)	WMS
Name of each exchange on which registered	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		77,616,828
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001604028
Current Fiscal Year End Date	--03-31

XML

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Current assets:
Cash	$ 560,744	$ 217,128
Receivables (less allowance for doubtful accounts of $6,058 and $8,227, respectively)	240,810	306,945
Inventories	405,409	463,994
Other current assets	31,459	29,422
Total current assets	1,238,422	1,017,489
Property, plant and equipment, net	810,887	733,059
Other assets:
Goodwill	617,397	620,193
Intangible assets, net	365,631	407,627
Other assets	129,622	122,757
Total assets	3,161,959	2,901,125
Current liabilities:
Current maturities of debt obligations	12,275	14,693
Current maturities of finance lease obligations	12,844	8,541
Accounts payable	207,902	210,111
Other accrued liabilities	162,275	142,400
Accrued income taxes	13,829	3,057
Total current liabilities	409,125	378,802
Long-term debt obligations (less unamortized debt issuance costs of $10,270 and $11,804, respectively)	1,261,742	1,269,391
Long-term finance lease obligations	37,947	32,272
Deferred tax liabilities	159,296	159,056
Other liabilities	71,980	66,744
Total liabilities	1,940,090	1,906,265
Commitments and contingencies (see Note 9)
Mezzanine equity:
Redeemable common stock: $0.01 par value; 7,488 and 9,429 shares outstanding, respectively	121,686	153,220
Total mezzanine equity	121,686	153,220
Stockholders’ equity:
Common stock; $0.01 par value: 1,000,000 shares authorized; 81,415 and 79,057 shares issued, respectively; 70,200 and 69,518 shares outstanding, respectively	11,670	11,647
Paid-in capital	1,195,893	1,134,864
Common stock in treasury, at cost	(1,110,670)	(920,999)
Accumulated other comprehensive loss	(26,601)	(27,580)
Retained earnings	1,008,270	626,215
Total ADS stockholders’ equity	1,078,562	824,147
Noncontrolling interest in subsidiaries	21,621	17,493
Total stockholders’ equity	1,100,183	841,640
Total liabilities, mezzanine equity and stockholders’ equity	$ 3,161,959	$ 2,901,125

XML

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Allowance for doubtful accounts	$ 6,058	$ 8,227
Unamortized debt issuance costs	$ 10,270	$ 11,804
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	81,415,000	79,057,000
Common stock, shares outstanding (in shares)	70,200,000	69,518,000
Redeemable Common Stock
Mezzanine equity, par value per share	$ 0.01	$ 0.01
Mezzanine equity, shares outstanding (in shares)	7,488,000	9,429,000

XML

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Net sales	$ 662,367,000	$ 655,167,000	$ 2,220,633,000	$ 2,453,562,000
Cost of goods sold	402,518,000	431,250,000	1,326,647,000	1,557,575,000
Gross profit	259,849,000	223,917,000	893,986,000	895,987,000
Operating expenses:
Selling, general and administrative	91,289,000	85,936,000	269,525,000	261,095,000
Loss (gain) on disposal of assets and costs from exit and disposal activities	2,512,000	(348,000)	(10,669,000)	(147,000)
Intangible amortization	12,782,000	13,842,000	38,376,000	41,360,000
Income from operations	153,266,000	124,487,000	596,754,000	593,679,000
Other expense:
Interest expense	22,331,000	20,001,000	65,984,000	49,334,000
Derivative gain and other income, net	(4,772,000)	(4,125,000)	(15,827,000)	(5,632,000)
Income before income taxes	135,707,000	108,611,000	546,597,000	549,977,000
Income tax expense	30,131,000	26,068,000	132,665,000	128,641,000
Equity in net income of unconsolidated affiliates	(1,304,000)	(639,000)	(3,880,000)	(3,705,000)
Net income	106,880,000	83,182,000	417,812,000	425,041,000
Less: net income attributable to noncontrolling interest	1,241,000	1,142,000	2,719,000	3,848,000
Net income attributable to ADS	$ 105,639,000	$ 82,040,000	$ 415,093,000	$ 421,193,000
Weighted average common shares outstanding:
Basic (in shares)	77,857	82,067	78,455	82,891
Diluted (in shares)	78,586	82,987	79,188	83,980
Net income per share:
Basic (in dollars per share)	$ 1.36	$ 1.00	$ 5.29	$ 5.08
Diluted (in dollars per share)	$ 1.34	$ 0.99	$ 5.24	$ 5.02

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 106,880,000	$ 83,182,000	$ 417,812,000	$ 425,041,000
Currency translation gain (loss)	4,020,000	4,973,000	2,388,000	(4,688,000)
Comprehensive income	110,900,000	88,155,000	420,200,000	420,353,000
Less: other comprehensive income attributable to noncontrolling interest	963,000	1,069,000	1,409,000	797,000
Less: net income attributable to noncontrolling interest	1,241,000	1,142,000	2,719,000	3,848,000
Total comprehensive income attributable to ADS	$ 108,696,000	$ 85,944,000	$ 416,072,000	$ 415,708,000

XML

Condensed Consolidated Statements of Cash Flows (Unaudited)	9 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Cash Flows from Operating Activities
Net income	$ 417,812,000	$ 425,041,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	112,014,000	107,346,000
Deferred income taxes	335,000	(4,165,000)
Gain on disposal of assets and costs from exit and disposal activities	(10,669,000)	(147,000)
Stock-based compensation	23,636,000	19,912,000
Amortization of deferred financing charges	1,533,000	909,000
Fair market value adjustments to derivatives	(162,000)	2,309,000
Equity in net income of unconsolidated affiliates	(3,880,000)	(3,705,000)
Other operating activities	5,720,000	2,732,000
Changes in working capital:
Receivables	67,230,000	99,958,000
Inventories	59,752,000	34,871,000
Prepaid expenses and other current assets	(534,000)	(4,532,000)
Accounts payable, accrued expenses, and other liabilities	27,475,000	(20,091,000)
Net cash provided by operating activities	700,262,000	660,438,000
Cash Flows from Investing Activities
Capital expenditures	(136,385,000)	(126,858,000)
Proceeds from disposition of assets	19,979,000	0
Acquisition, net of cash acquired	0	(48,010,000)
Other investing activities	527,000	46,000
Net cash used in investing activities	(115,879,000)	(174,822,000)
Cash Flows from Financing Activities
Payments on syndicated Term Loan Facility	(5,250,000)	(5,250,000)
Proceeds from Senior Notes due 2030	0	500,000,000
Debt issuance costs	0	(11,575,000)
Payments on Equipment Financing	(6,361,000)	(10,213,000)
Payments on finance lease obligations	(8,624,000)	(4,954,000)
Repurchase of common stock	(178,187,000)	(375,027,000)
Cash dividends paid	(33,111,000)	(30,111,000)
Dividends paid to noncontrolling interest holder	0	(3,652,000)
Proceeds from exercise of stock options	3,956,000	5,145,000
Payment of withholding taxes on vesting of restricted stock units	(8,859,000)	(28,653,000)
Net cash used in financing activities	(236,436,000)	(78,590,000)
Effect of exchange rate changes on cash	1,271,000	(461,000)
Net change in cash	349,218,000	406,565,000
Cash and restricted cash at beginning of period	217,128,000	20,125,000
Cash and restricted cash at end of period	566,346,000	426,690,000
Cash	560,744,000
Restricted cash (included in Other assets in the Condensed Consolidated Balance Sheets)	5,602,000
Revolving Credit Agreement
Cash Flows from Financing Activities
Proceeds from Revolving Credit Agreement	0	26,200,000
Payments on Revolving Credit Agreement	0	(140,500,000)
Amended Revolving Credit Facility
Cash Flows from Financing Activities
Proceeds from Revolving Credit Agreement	0	97,000,000
Payments on Revolving Credit Agreement	$ 0	$ (97,000,000)

XML

Condensed Consolidated Statements of Stockholders' Equity and Mezzanine Equity (Unaudited) - USD ($)	Total	Total Mezzanine Equity	Total Mezzanine Equity KSOP redeemable common stock conversion	Total Mezzanine Equity ESOP share conversion	Redeemable Common Stock	Redeemable Common Stock KSOP redeemable common stock conversion	Redeemable Common Stock ESOP share conversion	Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred Stock ESOP share conversion	Total ADS Stockholders’ Equity	Common Stock	Paid -In Capital	Common Stock in Treasury	Accumulated Other Compre-hensive Loss	Retained Earnings	Non- controlling Interest in Subsidiaries
Beginning balance, common stock (in shares) at Mar. 31, 2022											75,529,000
Beginning balance, treasury stock (in shares) at Mar. 31, 2022													3,220,000
Beginning balance at Mar. 31, 2022	$ 909,661,000									$ 893,039,000	$ 11,612,000	$ 1,065,628,000	$ (318,691,000)	$ (24,386,000)	$ 158,876,000	$ 16,622,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	425,041,000									421,193,000					421,193,000	3,848,000
Other comprehensive income	(4,688,000)									(5,485,000)				(5,485,000)		797,000
Common stock dividends	(30,058,000)									(30,058,000)					(30,058,000)
Share repurchases (in shares)													3,756,000
Share repurchases	(375,027,000)									(375,027,000)			$ (375,027,000)
Dividends paid to noncontrolling interest holder	3,652,000															(3,652,000)
KSOP redeemable common stock conversion (in shares)											2,353,000
KSOP redeemable common stock conversion	38,256,000									38,256,000	$ 24,000	38,232,000
Exercise of common stock options (in shares)											200,000
Exercise of common stock options	5,145,000									5,145,000	$ 2,000	5,143,000
Restricted stock awards (in shares)											176,000		59,000
Restricted stock awards	(5,631,000)									(5,631,000)	$ 2,000		$ (5,633,000)
Stock-based compensation expense	19,912,000									19,912,000		19,912,000
Ending balance, common stock (in shares) at Dec. 31, 2022											78,785,000
Ending balance, treasury stock (in shares) at Dec. 31, 2022													7,240,000
Ending balance at Dec. 31, 2022	958,613,000									940,998,000	$ 11,645,000	1,128,915,000	$ (719,702,000)	(29,871,000)	550,011,000	17,615,000
Mezzanine equity, beginning balance (in shares) at Mar. 31, 2022					0			15,630,000
Mezzanine equity, beginning balance at Mar. 31, 2022		$ 195,384,000			$ 0			$ 195,384,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of convertible securities (in shares)						(2,353,000)	12,022,000		(15,630,000)
Temporary equity, conversion of convertible securities			$ (38,256,000)	$ 0		$ (38,256,000)	$ 195,384,000		$ (195,384,000)
Mezzanine equity, ending balance (in shares) at Dec. 31, 2022					9,669,000			0
Mezzanine equity, ending balance at Dec. 31, 2022		157,128,000			$ 157,128,000			$ 0
Beginning balance, common stock (in shares) at Sep. 30, 2022											78,519,000
Beginning balance, treasury stock (in shares) at Sep. 30, 2022													5,314,000
Beginning balance at Sep. 30, 2022	1,055,742,000									1,038,413,000	$ 11,642,000	1,119,453,000	$ (536,697,000)	(33,775,000)	477,790,000	17,329,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	83,182,000									82,040,000					82,040,000	1,142,000
Other comprehensive income	4,973,000									3,904,000				3,904,000		1,069,000
Common stock dividends	(9,819,000)									(9,819,000)					(9,819,000)
Share repurchases (in shares)													1,891,000
Share repurchases	(179,864,000)									(179,864,000)			$ (179,864,000)
Dividends paid to noncontrolling interest holder	1,925,000															(1,925,000)
KSOP redeemable common stock conversion (in shares)											171,000
KSOP redeemable common stock conversion	2,800,000									2,800,000	$ 2,000	2,798,000
Exercise of common stock options (in shares)											17,000
Exercise of common stock options	485,000									485,000	$ 0	485,000
Restricted stock awards (in shares)											78,000		35,000
Restricted stock awards	(3,140,000)									(3,140,000)	$ 1,000		$ (3,141,000)
Stock-based compensation expense	6,179,000									6,179,000		6,179,000
Ending balance, common stock (in shares) at Dec. 31, 2022											78,785,000
Ending balance, treasury stock (in shares) at Dec. 31, 2022													7,240,000
Ending balance at Dec. 31, 2022	$ 958,613,000									940,998,000	$ 11,645,000	1,128,915,000	$ (719,702,000)	(29,871,000)	550,011,000	17,615,000
Mezzanine equity, beginning balance (in shares) at Sep. 30, 2022					9,840,000			0
Mezzanine equity, beginning balance at Sep. 30, 2022		159,928,000			$ 159,928,000			$ 0
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of convertible securities (in shares)						(171,000)
Temporary equity, conversion of convertible securities			(2,800,000)			$ (2,800,000)
Mezzanine equity, ending balance (in shares) at Dec. 31, 2022					9,669,000			0
Mezzanine equity, ending balance at Dec. 31, 2022		157,128,000			$ 157,128,000			$ 0
Beginning balance, common stock (in shares) at Mar. 31, 2023	69,518,000										79,057,000
Beginning balance, treasury stock (in shares) at Mar. 31, 2023													9,539,000
Beginning balance at Mar. 31, 2023	$ 841,640,000									824,147,000	$ 11,647,000	1,134,864,000	$ (920,999,000)	(27,580,000)	626,215,000	17,493,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	417,812,000									415,093,000					415,093,000	2,719,000
Other comprehensive income	2,388,000									979,000				979,000		1,409,000
Common stock dividends	(33,038,000)									(33,038,000)					(33,038,000)
Share repurchases (in shares)													1,579,000
Share repurchases	(180,812,000)									(180,812,000)			$ (180,812,000)
KSOP redeemable common stock conversion (in shares)											1,941,000
KSOP redeemable common stock conversion	31,534,000									31,534,000	$ 19,000	31,515,000
Exercise of common stock options (in shares)											97,000
Exercise of common stock options	3,956,000									3,956,000	$ 1,000	3,955,000
Restricted stock awards (in shares)											100,000		25,000
Restricted stock awards	(2,462,000)									(2,462,000)	$ 1,000		$ (2,463,000)
Stock-based compensation expense	23,636,000									23,636,000		23,636,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans											20,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	1,927,000									1,927,000		1,927,000
Performance-based restricted stock units (in shares)											200,000		72,000
Performance-based restricted stock units	(6,394,000)									(6,394,000)	$ 2,000		$ (6,396,000)
Other	$ (4,000)									(4,000)		(4,000)
Ending balance, common stock (in shares) at Dec. 31, 2023	70,200,000										81,415,000
Ending balance, treasury stock (in shares) at Dec. 31, 2023													11,215,000
Ending balance at Dec. 31, 2023	$ 1,100,183,000									1,078,562,000	$ 11,670,000	1,195,893,000	$ (1,110,670,000)	(26,601,000)	1,008,270,000	21,621,000
Mezzanine equity, beginning balance (in shares) at Mar. 31, 2023					9,429,000
Mezzanine equity, beginning balance at Mar. 31, 2023	153,220,000	153,220,000			$ 153,220,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of convertible securities (in shares)						(1,941,000)
Temporary equity, conversion of convertible securities			(31,534,000)			$ (31,534,000)
Mezzanine equity, ending balance (in shares) at Dec. 31, 2023					7,488,000
Mezzanine equity, ending balance at Dec. 31, 2023	121,686,000	121,686,000			$ 121,686,000
Beginning balance, common stock (in shares) at Sep. 30, 2023											80,635,000
Beginning balance, treasury stock (in shares) at Sep. 30, 2023													10,617,000
Beginning balance at Sep. 30, 2023	1,048,830,000									1,029,413,000	$ 11,663,000	1,173,574,000	$ (1,039,717,000)	(29,658,000)	913,551,000	19,417,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	106,880,000									105,639,000					105,639,000	1,241,000
Other comprehensive income	4,020,000									3,057,000				3,057,000		963,000
Common stock dividends	(10,920,000)									(10,920,000)					(10,920,000)
Share repurchases (in shares)													598,000
Share repurchases	(70,905,000)									(70,905,000)			$ (70,905,000)
KSOP redeemable common stock conversion (in shares)											718,000
KSOP redeemable common stock conversion	11,663,000									11,663,000	$ 7,000	11,656,000
Exercise of common stock options (in shares)											41,000
Exercise of common stock options	1,333,000									1,333,000	$ 0	1,333,000
Restricted stock awards (in shares)											1,000		0
Restricted stock awards	(48,000)									(48,000)	$ 0		$ (48,000)
Stock-based compensation expense	7,402,000									7,402,000		7,402,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans											20,000
Stock Issued During Period, Value, Employee Stock Purchase Plan										1,927,000		1,927,000
Other	$ 1,000									1,000		1,000
Ending balance, common stock (in shares) at Dec. 31, 2023	70,200,000										81,415,000
Ending balance, treasury stock (in shares) at Dec. 31, 2023													11,215,000
Ending balance at Dec. 31, 2023	$ 1,100,183,000									$ 1,078,562,000	$ 11,670,000	$ 1,195,893,000	$ (1,110,670,000)	$ (26,601,000)	$ 1,008,270,000	$ 21,621,000
Mezzanine equity, beginning balance (in shares) at Sep. 30, 2023					8,206,000
Mezzanine equity, beginning balance at Sep. 30, 2023		133,349,000			$ 133,349,000
Increase (Decrease) in Temporary Equity [Roll Forward]
Conversion of convertible securities (in shares)						(718,000)
Temporary equity, conversion of convertible securities			$ (11,663,000)			$ (11,663,000)
Mezzanine equity, ending balance (in shares) at Dec. 31, 2023					7,488,000
Mezzanine equity, ending balance at Dec. 31, 2023	$ 121,686,000	$ 121,686,000			$ 121,686,000

XML

Condensed Consolidated Statements of Stockholders' Equity and Mezzanine Equity (Unaudited) (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Statement of Stockholders' Equity [Abstract]
Common stock dividends per share (in dollars per share)	$ 0.14	$ 0.12	$ 0.42	$ 0.36

XML

Background and Summary of Significant Accounting Policies

9 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Background and Summary of Significant Accounting Policies

BACKGROUND AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Description of Business - Advanced Drainage Systems, Inc., incorporated in Delaware, and its subsidiaries (collectively referred to as “ADS” or the “Company”) designs, manufactures and markets innovative water management solutions in the stormwater and onsite septic wastewater industries, providing superior drainage solutions for use in the construction and agriculture marketplace. ADS’s products are used across a broad range of end markets and applications, including non-residential, infrastructure and agriculture applications.

The Company is managed and reports results of operations in three reportable segments: Pipe, Infiltrator Water Technologies Ultimate Holdings, Inc (“Infiltrator”) and International. The Company also reports the results of its Allied Products and all other business segments as Allied Products and Other.

Historically, sales of the Company’s products have been higher in the first and second quarters of each fiscal year due to favorable weather and longer daylight conditions accelerating construction activity during these periods. Seasonal variations in operating results may also be impacted by inclement weather conditions, such as cold or wet weather, which can delay projects.

Basis of Presentation - The Company prepares its Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Condensed Consolidated Balance Sheet as of March 31, 2023 was derived from audited financial statements included in the Annual Report on Form 10-K for the year ended March 31, 2023 (“Fiscal 2023 Form 10-K”). The accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as of December 31, 2023 and the results of operations for the three and nine months ended December 31, 2023 and cash flows for the nine months ended December 31, 2023. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, filed in the Company’s Fiscal 2023 Form 10-K.

Principles of Consolidation - The Condensed Consolidated Financial Statements include the Company, its wholly-owned subsidiaries, its majority-owned subsidiaries and variable interest entities (“VIEs”) of which the Company is the primary beneficiary. The Company uses the equity method of accounting for equity investments where it exercises significant influence but does not hold a controlling financial interest. Such investments are recorded in Other assets in the Condensed Consolidated Balance Sheets and the related equity earnings from these investments are included in Equity in net income of unconsolidated affiliates in the Condensed Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.

Recent Accounting Guidance

Improvements to Reportable Segment Disclosures - In November 2023, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update (“ASU”) to amend ASC 280, Segment Reporting to enhance segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. In addition, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. The amendments are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The amendments must be applied retrospectively to all periods presented in the financial statements. The Company is currently evaluating the impact of this standard on the Consolidated Financial Statements.

Improvements to Income Tax Disclosures - In December 2023, the FASB issued an ASU to amend ASC 740, Income Taxes to enhance the transparency and usefulness of income tax disclosures, primarily related to the rate reconciliation and income taxes paid information. The amendments may be applied prospectively or retrospectively and are effective for fiscal years beginning after December 15, 2024. The Company is currently evaluating the impact of this standard on the Consolidated Financial Statements.

Except for the pronouncements described above, there have been no new accounting pronouncements issued or adopted since the filing of the Fiscal 2023 Form 10-K that have significance, or potential significance, to the Consolidated Financial Statements.

XML

Discontinued Operations and Disposal Groups

9 Months Ended

Dec. 31, 2023

Discontinued Operations and Disposal Groups [Abstract]

Loss on Disposal of Assets and Costs from Exit and Disposal Activities

GAIN ON DISPOSAL OF ASSETS AND COSTS FROM EXIT AND DISPOSAL ACTIVITIES

On April 14, 2023, the Company completed its divestiture of substantially all of the assets of Spartan Concrete, Inc. to a third party purchaser for consideration of $20.0 million. The Company recognized a gain on the sale of $14.9 million in the Condensed Consolidated Statements of Operations. Prior to the divestiture, the Company recorded the results of operations in Allied & Other.

XML

Revenue Recognition

9 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue Recognition

REVENUE RECOGNITION

Revenue Disaggregation - The Company disaggregates net sales by Domestic, International and Infiltrator and further disaggregates Domestic and International by product type, consistent with its reportable segment disclosure. This disaggregation level best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Refer to “Note 12. Business Segments Information” for the Company’s disaggregation of Net sales by reportable segment.

Contract Balances - The Company recognizes a contract asset representing the Company’s right to recover products upon the receipt of returned products and a contract liability for the customer refund. The following table presents the balance of the Company’s contract asset and liability as of the periods presented:

(In thousands)	December 31, 2023		March 31, 2023
Contract asset - product returns	$	1,546	$	933
Refund liability	4,628		2,664

XML

Leases

9 Months Ended

Dec. 31, 2023

Leases [Abstract]

Leases

LEASES

Nature of the Company’s Leases - The Company has operating and finance leases for plants, yards, corporate offices, tractors, trailers and other equipment. The Company’s leases have remaining terms of less than one year to 14 years. A portion of the Company’s yard leases include an option to extend the leases for up to five years. The Company has included renewal options which are reasonably certain to be exercised in its right-of-use assets and lease liabilities.

XML

Inventories

9 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Inventories

INVENTORIES

Inventories as of the periods presented consisted of the following:

(In thousands)	December 31, 2023		March 31, 2023
Raw materials	$	106,097	$	108,206
Finished goods	299,312		355,788
Total inventories	$	405,409	$	463,994

XML

Net Income Per Share and Stockholders' Equity

9 Months Ended

Dec. 31, 2023

Net Income Per Share And Stockholders Equity [Abstract]

Net Income Per Share and Stockholders' Equity

NET INCOME PER SHARE AND STOCKHOLDERS' EQUITY

Net Income per Share - The following table presents information necessary to calculate net income per share for the periods presented, as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands, except per share data)	2023		2022		2023		2022
NET INCOME PER SHARE—BASIC:
Net income available to common stockholders – Basic	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average number of common shares outstanding – Basic	77,857		82,067		78,455		82,891
Net income per common share – Basic	$	1.36	$	1.00	$	5.29	$	5.08
NET INCOME PER SHARE—DILUTED:
Net income available to common stockholders – Diluted	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average number of common shares outstanding – Basic	77,857		82,067		78,455		82,891
Assumed restricted stock	75		114		60		131
Assumed exercise of stock options	595		626		597		702
Assumed performance units	59		180		76		256
Weighted average number of common shares outstanding – Diluted	78,586		82,987		79,188		83,980
Net income per common share – Diluted	$	1.34	$	0.99	$	5.24	$	5.02
Potentially dilutive securities excluded as anti-dilutive	19		42		46		45

XML

Related Party Transactions

9 Months Ended

Dec. 31, 2023

Related Party Transactions [Abstract]

Related Party Transactions

RELATED PARTY TRANSACTIONS

ADS Mexicana - ADS conducts business in Mexico and Central America through its joint venture, ADS Mexicana, S.A. de C.V. (“ADS Mexicana”). ADS owns 51% of the outstanding stock of ADS Mexicana and consolidates ADS Mexicana for financial reporting purposes.

On June 6, 2022, the Company and ADS Mexicana amended the Intercompany Revolving Credit Promissory Note (the “Intercompany Note”) with a borrowing capacity of $9.5 million. The Intercompany Note matures on June 8, 2027. The Intercompany Note indemnifies the ADS Mexicana joint venture partner for 49% of any unpaid borrowings. The interest rates under the Intercompany Note are determined by certain base rates or Secured Overnight Financing Rate (“SOFR”) plus an applicable margin based on the Leverage Ratio. As of both December 31, 2023 and March 31, 2023, there were no borrowings outstanding under the Intercompany Note.

South American Joint Venture - The Tuberias Tigre - ADS Limitada joint venture (the “South American Joint Venture”) manufactures and sells HDPE corrugated pipe in certain South American markets. ADS owns 50% of the South American Joint Venture. ADS is the guarantor of 50% of the South American Joint Venture’s credit arrangement, and the debt guarantee is shared equally with the joint venture partner. The Company’s maximum potential obligation under this guarantee is $5.5 million as of December 31, 2023. The maximum borrowings permitted under the South American Joint Venture’s credit facility are $11.0 million. The Company does not anticipate any required contributions related to the balance of this credit arrangement. As of December 31, 2023, there was no outstanding principal balance for the South American Joint Venture’s credit facility including letters of credit. As of March 31, 2023, the outstanding principal balances of the South American Joint Venture’s credit facility including letters of credit was $5.5 million.

XML

Debt

9 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Debt

DEBT

Long-term debt as of the periods presented consisted of the following:

(In thousands)	December 31, 2023		March 31, 2023
Term Loan Facility	$	422,000	$	427,250
Senior Notes due 2027	350,000		350,000
Senior Notes due 2030	500,000		500,000
Revolving Credit Facility	—		—
Equipment Financing	12,287		18,638
Total	1,284,287		1,295,888
Less: Unamortized debt issuance costs	10,270		11,804
Less: Current maturities	12,275		14,693
Long-term debt obligations	$	1,261,742	$	1,269,391

Senior Secured Credit Facilities – In May 2022, the Company entered into a Second Amendment (the “Second Amendment”) to the Company's Base Credit Agreement with Barclays Bank PLC, as administrative agent under the Term Loan Facility, PNC Bank, National Association, as new administrative agent under the Revolving Credit Facility. Among other things, the Second Amendment (i) amended the Base Credit Agreement by increasing the Revolving Credit Facility (the “Amended Revolving Credit Facility”) from $350 million to $600 million (including an increase of the sub-limit for the swing-line sub-facility from $50 million to $60 million), (ii) extended the maturity date of the Revolving Credit Facility to May 26, 2027, (iii) revised the “applicable margin” to provide an additional step-down to 175 basis points (for Term Benchmark based loans) and 75 basis points (for base rate loans) in the event the consolidated senior secured net leverage ratio is less than 2.00 to 1.00, and (iv) reset the “incremental amount” and the investment basket in non-guarantors and joint ventures. The Second Amendment also revised the reference interest rate from LIBOR to SOFR for both the Amended Revolving Credit Facility and the Term Loan Facility. Letters of credit outstanding at December 31, 2023 and March 31, 2023 amounted to $11.2 million and $9.7 million, respectively, and reduced the availability of the Revolving Credit Facility.

Senior Notes due 2027 – On September 23, 2019, the Company issued $350.0 million aggregate principal amount of 5.0% Senior Notes due 2027 (the “2027 Notes”) pursuant to an Indenture, dated September 23, 2019 (the “2027 Indenture”), among the Company, the guarantors party thereto (the “Guarantors”) and U.S. Bank National Association, as Trustee (the “Trustee”).

Senior Notes due 2030 – On June 9, 2022, the Company issued $500.0 million aggregate principal amount of 6.375% Senior Notes due 2030 (the “2030 Notes”) pursuant to an Indenture, dated June 9, 2022 (the “2030 Indenture”), among the Company, the Guarantors and the Trustee.

Equipment Financing – The assets under the Equipment Financing acquired are titled to the Company and included in Property, plant and equipment, net on the Company's Condensed Consolidated Balance Sheet. The equipment financing has an initial term of between 12 and 84 months, based on the life of the equipment, and bears a weighted average interest of 1.6% as of December 31, 2023. The current portion of the equipment financing is $5.3 million, and the long-term portion is $7.0 million at December 31, 2023.

Valuation of Debt - The carrying amounts of current financial assets and liabilities approximate fair value because of the immediate or short-term maturity of these items. The following table presents the carrying and fair value of the Company’s 2027 Notes, 2030 Notes and Equipment Financing for the periods presented:

	December 31, 2023				March 31, 2023
(In thousands)	Fair Value		Carrying Value		Fair Value		Carrying Value
Senior Notes due 2027	$	340,883	$	350,000	$	333,970	$	350,000
Senior Notes due 2030	506,075		500,000		496,605		500,000
Equipment Financing	11,940		12,287		17,921		18,638
Total fair value	$	858,898	$	862,287	$	848,496	$	868,638

The fair values of the 2027 Notes and 2030 Notes were determined based on quoted market data for the Company’s 2027 Notes and 2030 Notes, respectively. The fair value of the Equipment Financing was determined based on a comparison of the interest rate and terms of such borrowings to the rates and terms of similar debt available for the

period. The categorization of the framework used to evaluate the 2027 Notes, 2030 Notes and Equipment Financing are considered Level 2. The Company believes the carrying amount of the remaining long-term debt, including the Term Loan Facility and Revolving Credit Facility, is not materially different from its fair value as the interest rates and terms of the borrowings are similar to currently available borrowings.

XML

Commitments and Contingencies

9 Months Ended

Dec. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

COMMITMENTS AND CONTINGENCIES

Purchase Commitments - The Company has historically secured supplies of resin raw material by agreeing to purchase quantities during a future given period at a fixed price. These purchase contracts typically ranged from 1 to 12 months and occur in the ordinary course of business. The Company does not have any outstanding purchase commitments with fixed price and quantity as of December 31, 2023. The Company also enters into equipment purchase contracts with manufacturers.

Litigation and Other Proceedings – The Company is involved from time to time in various legal proceedings that arise in the ordinary course of business, including but not limited to commercial disputes, environmental matters, employee related claims, intellectual property disputes and litigation in connection with transactions including acquisitions and divestitures. The Company does not believe that such litigation, claims, and administrative proceedings will have a material adverse impact on the Company’s financial position or results of operations. The Company records a liability when a loss is considered probable, and the amount can be reasonably estimated.

XML

Income Taxes

9 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

INCOME TAXES

The Company’s effective tax rate will vary based on a variety of factors, including overall profitability, the geographical mix of income before taxes and related tax rates in jurisdictions where it operates and other one-time charges, as well as the occurrence of discrete events. For the three months ended December 31, 2023 and 2022, the Company utilized an effective tax rate of 22.2% and 24.0%, respectively, to calculate its provision for income taxes. For the nine months ended December 31, 2023 and 2022, the Company utilized an effective tax rate of 24.3% and 23.4%, respectively, to calculate its provision for income taxes. State and local income taxes increased the effective rate for the three and nine months ended December 31, 2023 and 2022. Discrete income tax benefits related to amended state tax returns and the federal return to provision adjustment decreased the effective tax rate for the three months ended December 31, 2023. Additionally, discrete income tax benefit related to the stock-based compensation windfall decreased the effective tax rate for the three and nine months ended December 31, 2022.

XML

Stock-Based Compensation

9 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock-Based Compensation

STOCK-BASED COMPENSATION

ADS has several programs for stock-based payments to employees and non-employee members of its Board of Directors, including stock options, performance-based restricted stock units and restricted stock. The Company recognized stock-based compensation expense in the following line items of the Condensed Consolidated Statements of Operations for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Component of income before income taxes:
Cost of goods sold	$	1,316	$	743	$	3,473	$	2,175
Selling, general and administrative expenses	6,086		5,436		20,163		17,737
Total stock-based compensation expense	$	7,402	$	6,179	$	23,636	$	19,912

The following table summarizes stock-based compensation expense by award type for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Stock-based compensation expense:
Stock Options	$	1,305	$	1,035	$	4,046	$	3,316
Restricted Stock	2,050		1,754		6,131		5,480
Performance-based Restricted Stock Units	3,191		2,827		11,110		9,619
Employee Stock Purchase Plan	313		—		694		—
Non-Employee Directors	543		563		1,655		1,497
Total stock-based compensation expense	$	7,402	$	6,179	$	23,636	$	19,912

2017 Omnibus Incentive Plan - The 2017 Incentive Plan provides for the issuance of a maximum of 5.0 million shares of the Company’s common stock for awards made thereunder, which awards may consist of stock options, restricted stock, restricted stock units, stock appreciation rights, phantom stock, cash-based awards, performance awards (which may take the form of performance cash, performance units or performance shares) or other stock-based awards.

Restricted Stock – During the nine months ended December 31, 2023, the Company granted 0.1 million shares of restricted stock with a grant date fair value of $13.2 million.

Performance-based Restricted Stock Units (“Performance Units”) – During the nine months ended December 31, 2023, the Company granted 0.1 million performance share units at a grant date fair value of $8.7 million.

Options – During the nine months ended December 31, 2023, the Company granted 0.2 million nonqualified stock options under the 2017 Incentive Plan with a grant date fair value of $7.5 million. The Company estimates the fair value of stock options using a Black-Scholes option-pricing model. The following table summarizes the assumptions used to estimate the fair value of stock-options during the period presented:

	Nine Months Ended December 31, 2023
Common stock price	$96.51
Expected stock price volatility	45.6%
Risk-free interest rate	3.8%
Weighted-average expected option life (years)	6
Dividend yield	0.58%

Employee Stock Purchase Plan (“ESPP”) - In July 2022, the Company’s stockholders approved the Advanced Drainage Systems, Inc. Employee Stock Purchase Plan, which provides for a maximum of 0.4 million shares of the Company’s common stock. Eligible employees may purchase the Company's common stock at 85% of the lower of the fair market value of the Company's common stock on the first day or the last day of the offering period. The first offering period commenced July 1, 2023 and ended December 31, 2023.

XML

Business Segments Information

9 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Business Segments Information

BUSINESS SEGMENTS INFORMATION

The Company operates its business in three distinct reportable segments: “Pipe”, “International” and “Infiltrator.” “Allied Products & Other” represents the Company’s Allied Products and all other business segments. The Chief Operating Decision Maker (the “CODM”) evaluates segment reporting based on Net Sales and Segment Adjusted Gross Profit. The Company calculated Segment Adjusted Gross Profit as Net sales less Costs of goods sold, depreciation and amortization, stock-based compensation and non-cash charges. A measure of assets is not applicable, as segment assets are not regularly reviewed by the CODM for evaluating performance or allocating resources.

The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products for the periods presented:

	Three Months Ended
	December 31, 2023						December 31, 2022
(In thousands)	Net Sales		Intersegment Net Sales		Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	360,733	$	(14,680)	$	346,053	$	375,719	$	(10,839)	$	364,880
Infiltrator	131,144		(27,273)		103,871		103,895		(14,961)		88,934
International
International - Pipe	44,203		(2,369)		41,834		44,882		(5,311)		39,571
International - Allied Products & Other	14,166		(1)		14,165		14,075		—		14,075
Total International	58,369		(2,370)		55,999		58,957		(5,311)		53,646
Allied Products & Other	159,162		(2,718)		156,444		149,044		(1,337)		147,707
Intersegment Eliminations	(47,041)		47,041		—		(32,448)		32,448		—
Total Consolidated	$	662,367	$	—	$	662,367	$	655,167	$	—	$	655,167
	Nine Months Ended
	December 31, 2023						December 31, 2022
(In thousands)	Net Sales		Intersegment Net Sales		Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	1,217,302	$	(36,974)	$	1,180,328	$	1,401,554	$	(31,483)	$	1,370,071
Infiltrator	406,361		(63,405)		342,956		420,920		(66,317)		354,603
International
International - Pipe	133,787		(3,917)		129,870		154,762		(18,509)		136,253
International - Allied Products & Other	46,789		(27)		46,762		49,172		—		49,172
Total International	180,576		(3,944)		176,632		203,934		(18,509)		185,425
Allied Products & Other	528,303		(7,586)		520,717		550,153		(6,690)		543,463
Intersegment Eliminations	(111,909)		111,909		—		(122,999)		122,999		—
Total Consolidated	$	2,220,633	$	—	$	2,220,633	$	2,453,562	$	—	$	2,453,562

The following sets forth certain financial information attributable to the reportable segments for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Segment Adjusted Gross Profit
Pipe	$	115,621	$	106,279	$	402,126	$	421,011
Infiltrator	68,392		46,497		216,319		193,569
International	14,012		13,342		51,380		51,456
Allied Products & Other	88,150		78,401		300,574		293,472
Intersegment Eliminations	(1,922)		714		(4,431)		329
Total	$	284,253	$	245,233	$	965,968	$	959,837
Depreciation and Amortization
Pipe	$	15,491	$	12,754	$	43,882	$	38,754
Infiltrator	5,543		5,120		16,435		15,014
International	1,195		1,369		3,669		4,023
Allied Products & Other(a)	15,824		16,603		48,028		49,555
Total	$	38,053	$	35,846	$	112,014	$	107,346
Capital Expenditures
Pipe	$	31,287	$	28,268	$	84,700	$	75,565
Infiltrator	2,962		12,810		14,458		33,856
International	1,872		2,366		4,807		4,393
Allied Products & Other(a)	17,639		7,869		32,420		13,044
Total	$	53,760	$	51,313	$	136,385	$	126,858

(a)Includes depreciation, amortization and capital expenditures not allocated to a reportable segment. The amortization expense of Infiltrator intangible assets is included in Allied Products & Other.

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Reconciliation of Segment Adjusted Gross Profit:
Total Gross Profit	$	259,849	$	223,917	$	893,986	$	895,987
Depreciation and Amortization	23,088		20,573		68,509		61,675
Stock-based compensation expense	1,316		743		3,473		2,175
Total Segment Adjusted Gross Profit	$	284,253	$	245,233	$	965,968	$	959,837

XML

Supplemental Disclosure of Cash Flow Information

9 Months Ended

Dec. 31, 2023

Supplemental Cash Flow Elements [Abstract]

Cash Flow, Supplemental Disclosures

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION

Supplemental disclosures of cash flow information for the nine months ended December 31 were as follows:

(In thousands)	2023		2022
Cash paid for income taxes	$	114,712	$	136,320
Cash paid for interest	51,484		24,757
Non-cash operating, investing and financing activities:
Repurchase of common stock pending settlement	1,139		—
Share repurchase excise tax accrual	1,486		—
Acquisition of property, plant and equipment under finance lease	21,061		10,684
Balance in accounts payable for the acquisition of property, plant and equipment	22,925		14,748

XML

Subsequent Events

9 Months Ended

Dec. 31, 2023

Subsequent Events [Abstract]

Subsequent Events

SUBSEQUENT EVENTS

Common Stock Dividend - Subsequent to the end of the quarter, the Company declared a quarterly cash dividend of $0.14 per share of common stock. The dividend is payable on March 15, 2024, to stockholders of record at the close of business on March 1, 2024.

Share Repurchase Program - Subsequent to the end of the quarter, 0.1 million shares of common stock at a cost of $13.1 million were repurchased under the Board of Directors' authorization in February 2022.

XML

Background and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation - The Company prepares its Condensed Consolidated Financial Statements in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The Condensed Consolidated Balance Sheet as of March 31, 2023 was derived from audited financial statements included in the Annual Report on Form 10-K for the year ended March 31, 2023 (“Fiscal 2023 Form 10-K”). The accompanying unaudited Condensed Consolidated Financial Statements contain all adjustments, of a normal recurring nature, necessary to present fairly its financial position as of December 31, 2023 and the results of operations for the three and nine months ended December 31, 2023 and cash flows for the nine months ended December 31, 2023. The interim Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements, including the notes thereto, filed in the Company’s Fiscal 2023 Form 10-K.

Principles of Consolidation

Principles of Consolidation - The Condensed Consolidated Financial Statements include the Company, its wholly-owned subsidiaries, its majority-owned subsidiaries and variable interest entities (“VIEs”) of which the Company is the primary beneficiary. The Company uses the equity method of accounting for equity investments where it exercises significant influence but does not hold a controlling financial interest. Such investments are recorded in Other assets in the Condensed Consolidated Balance Sheets and the related equity earnings from these investments are included in Equity in net income of unconsolidated affiliates in the Condensed Consolidated Statements of Operations. All intercompany balances and transactions have been eliminated in consolidation.

Recent Accounting Guidance

Recent Accounting Guidance

Improvements to Reportable Segment Disclosures - In November 2023, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update (“ASU”) to amend ASC 280, Segment Reporting to enhance segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. In addition, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. The amendments are effective for fiscal years beginning after December 15, 2023 and interim periods within fiscal years beginning after December 15, 2024. The amendments must be applied retrospectively to all periods presented in the financial statements. The Company is currently evaluating the impact of this standard on the Consolidated Financial Statements.

Improvements to Income Tax Disclosures - In December 2023, the FASB issued an ASU to amend ASC 740, Income Taxes to enhance the transparency and usefulness of income tax disclosures, primarily related to the rate reconciliation and income taxes paid information. The amendments may be applied prospectively or retrospectively and are effective for fiscal years beginning after December 15, 2024. The Company is currently evaluating the impact of this standard on the Consolidated Financial Statements.

Except for the pronouncements described above, there have been no new accounting pronouncements issued or adopted since the filing of the Fiscal 2023 Form 10-K that have significance, or potential significance, to the Consolidated Financial Statements.

Leases

Nature of the Company’s Leases - The Company has operating and finance leases for plants, yards, corporate offices, tractors, trailers and other equipment. The Company’s leases have remaining terms of less than one year to 14 years. A portion of the Company’s yard leases include an option to extend the leases for up to five years. The Company has included renewal options which are reasonably certain to be exercised in its right-of-use assets and lease liabilities.

XML

Revenue Recognition (Tables)

9 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Schedule of Contract Asset and Liability

The following table presents the balance of the Company’s contract asset and liability as of the periods presented:

(In thousands)	December 31, 2023		March 31, 2023
Contract asset - product returns	$	1,546	$	933
Refund liability	4,628		2,664

XML

Inventories (Tables)

9 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Schedule of Inventories

Inventories as of the periods presented consisted of the following:

(In thousands)	December 31, 2023		March 31, 2023
Raw materials	$	106,097	$	108,206
Finished goods	299,312		355,788
Total inventories	$	405,409	$	463,994

XML

Net Income Per Share and Stockholders' Equity (Tables)

9 Months Ended

Dec. 31, 2023

Net Income Per Share And Stockholders Equity [Abstract]

Summary of Net Income Per Share

The following table presents information necessary to calculate net income per share for the periods presented, as well as potentially dilutive securities excluded from the weighted average number of diluted common shares outstanding because their inclusion would have been anti-dilutive:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands, except per share data)	2023		2022		2023		2022
NET INCOME PER SHARE—BASIC:
Net income available to common stockholders – Basic	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average number of common shares outstanding – Basic	77,857		82,067		78,455		82,891
Net income per common share – Basic	$	1.36	$	1.00	$	5.29	$	5.08
NET INCOME PER SHARE—DILUTED:
Net income available to common stockholders – Diluted	$	105,639	$	82,040	$	415,093	$	421,193
Weighted average number of common shares outstanding – Basic	77,857		82,067		78,455		82,891
Assumed restricted stock	75		114		60		131
Assumed exercise of stock options	595		626		597		702
Assumed performance units	59		180		76		256
Weighted average number of common shares outstanding – Diluted	78,586		82,987		79,188		83,980
Net income per common share – Diluted	$	1.34	$	0.99	$	5.24	$	5.02
Potentially dilutive securities excluded as anti-dilutive	19		42		46		45

XML

Debt (Tables)

9 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Long-Term Debt

Long-term debt as of the periods presented consisted of the following:

(In thousands)	December 31, 2023		March 31, 2023
Term Loan Facility	$	422,000	$	427,250
Senior Notes due 2027	350,000		350,000
Senior Notes due 2030	500,000		500,000
Revolving Credit Facility	—		—
Equipment Financing	12,287		18,638
Total	1,284,287		1,295,888
Less: Unamortized debt issuance costs	10,270		11,804
Less: Current maturities	12,275		14,693
Long-term debt obligations	$	1,261,742	$	1,269,391

Summary of Carrying And Fair Value of Senior Notes

The following table presents the carrying and fair value of the Company’s 2027 Notes, 2030 Notes and Equipment Financing for the periods presented:

	December 31, 2023				March 31, 2023
(In thousands)	Fair Value		Carrying Value		Fair Value		Carrying Value
Senior Notes due 2027	$	340,883	$	350,000	$	333,970	$	350,000
Senior Notes due 2030	506,075		500,000		496,605		500,000
Equipment Financing	11,940		12,287		17,921		18,638
Total fair value	$	858,898	$	862,287	$	848,496	$	868,638

XML

Stock-Based Compensation (Tables)

9 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock-based Compensation Expense

The Company recognized stock-based compensation expense in the following line items of the Condensed Consolidated Statements of Operations for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Component of income before income taxes:
Cost of goods sold	$	1,316	$	743	$	3,473	$	2,175
Selling, general and administrative expenses	6,086		5,436		20,163		17,737
Total stock-based compensation expense	$	7,402	$	6,179	$	23,636	$	19,912

The following table summarizes stock-based compensation expense by award type for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Stock-based compensation expense:
Stock Options	$	1,305	$	1,035	$	4,046	$	3,316
Restricted Stock	2,050		1,754		6,131		5,480
Performance-based Restricted Stock Units	3,191		2,827		11,110		9,619
Employee Stock Purchase Plan	313		—		694		—
Non-Employee Directors	543		563		1,655		1,497
Total stock-based compensation expense	$	7,402	$	6,179	$	23,636	$	19,912

Summary of Assumption Used to Estimate Fair Value of Stock Options

The following table summarizes the assumptions used to estimate the fair value of stock-options during the period presented:

	Nine Months Ended December 31, 2023
Common stock price	$96.51
Expected stock price volatility	45.6%
Risk-free interest rate	3.8%
Weighted-average expected option life (years)	6
Dividend yield	0.58%

XML

Business Segments Information (Tables)

9 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Revenue from Reportable Segments by Product Type

The following table sets forth reportable segment information with respect to the amount of Net sales contributed by each class of similar products for the periods presented:

	Three Months Ended
	December 31, 2023						December 31, 2022
(In thousands)	Net Sales		Intersegment Net Sales		Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	360,733	$	(14,680)	$	346,053	$	375,719	$	(10,839)	$	364,880
Infiltrator	131,144		(27,273)		103,871		103,895		(14,961)		88,934
International
International - Pipe	44,203		(2,369)		41,834		44,882		(5,311)		39,571
International - Allied Products & Other	14,166		(1)		14,165		14,075		—		14,075
Total International	58,369		(2,370)		55,999		58,957		(5,311)		53,646
Allied Products & Other	159,162		(2,718)		156,444		149,044		(1,337)		147,707
Intersegment Eliminations	(47,041)		47,041		—		(32,448)		32,448		—
Total Consolidated	$	662,367	$	—	$	662,367	$	655,167	$	—	$	655,167
	Nine Months Ended
	December 31, 2023						December 31, 2022
(In thousands)	Net Sales		Intersegment Net Sales		Net Sales from External Customers		Net Sales		Intersegment Net Sales		Net Sales from External Customers
Pipe	$	1,217,302	$	(36,974)	$	1,180,328	$	1,401,554	$	(31,483)	$	1,370,071
Infiltrator	406,361		(63,405)		342,956		420,920		(66,317)		354,603
International
International - Pipe	133,787		(3,917)		129,870		154,762		(18,509)		136,253
International - Allied Products & Other	46,789		(27)		46,762		49,172		—		49,172
Total International	180,576		(3,944)		176,632		203,934		(18,509)		185,425
Allied Products & Other	528,303		(7,586)		520,717		550,153		(6,690)		543,463
Intersegment Eliminations	(111,909)		111,909		—		(122,999)		122,999		—
Total Consolidated	$	2,220,633	$	—	$	2,220,633	$	2,453,562	$	—	$	2,453,562

Schedule of Financial Information Attributable to Reportable Segments

The following sets forth certain financial information attributable to the reportable segments for the periods presented:

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Segment Adjusted Gross Profit
Pipe	$	115,621	$	106,279	$	402,126	$	421,011
Infiltrator	68,392		46,497		216,319		193,569
International	14,012		13,342		51,380		51,456
Allied Products & Other	88,150		78,401		300,574		293,472
Intersegment Eliminations	(1,922)		714		(4,431)		329
Total	$	284,253	$	245,233	$	965,968	$	959,837
Depreciation and Amortization
Pipe	$	15,491	$	12,754	$	43,882	$	38,754
Infiltrator	5,543		5,120		16,435		15,014
International	1,195		1,369		3,669		4,023
Allied Products & Other(a)	15,824		16,603		48,028		49,555
Total	$	38,053	$	35,846	$	112,014	$	107,346
Capital Expenditures
Pipe	$	31,287	$	28,268	$	84,700	$	75,565
Infiltrator	2,962		12,810		14,458		33,856
International	1,872		2,366		4,807		4,393
Allied Products & Other(a)	17,639		7,869		32,420		13,044
Total	$	53,760	$	51,313	$	136,385	$	126,858

(a)Includes depreciation, amortization and capital expenditures not allocated to a reportable segment. The amortization expense of Infiltrator intangible assets is included in Allied Products & Other.

Reconciliation of Gross Profit to Segment Adjusted Gross Profit

	Three Months Ended December 31,				Nine Months Ended December 31,
(In thousands)	2023		2022		2023		2022
Reconciliation of Segment Adjusted Gross Profit:
Total Gross Profit	$	259,849	$	223,917	$	893,986	$	895,987
Depreciation and Amortization	23,088		20,573		68,509		61,675
Stock-based compensation expense	1,316		743		3,473		2,175
Total Segment Adjusted Gross Profit	$	284,253	$	245,233	$	965,968	$	959,837

XML

Statement of Cash Flows, Supplemental Disclosures (Tables)

9 Months Ended

Dec. 31, 2023

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Supplemental disclosures of cash flow information for the nine months ended December 31 were as follows:

(In thousands)	2023		2022
Cash paid for income taxes	$	114,712	$	136,320
Cash paid for interest	51,484		24,757
Non-cash operating, investing and financing activities:
Repurchase of common stock pending settlement	1,139		—
Share repurchase excise tax accrual	1,486		—
Acquisition of property, plant and equipment under finance lease	21,061		10,684
Balance in accounts payable for the acquisition of property, plant and equipment	22,925		14,748

XML

Background and Summary of Significant Accounting Policies (Detail)	9 Months Ended
	Dec. 31, 2023 segment
Accounting Policies [Abstract]
Number of reportable segments	3

XML

Discontinued Operations and Disposal Groups (Details) - USD ($)		9 Months Ended
	Apr. 14, 2023	Dec. 31, 2023	Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from disposition of assets		$ 19,979,000	$ 0
Spartan Concrete, Inc.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Other Assets	$ 14,900,000
Proceeds from disposition of assets	$ 20,000,000

XML

Revenue Recognition - Schedule of Contract Asset and Liability (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Revenue from Contract with Customer [Abstract]
Contract asset - product returns	$ 1,546	$ 933
Refund liability	$ 4,628	$ 2,664

XML

Leases (Detail)	9 Months Ended
	Dec. 31, 2023
Minimum
Lessee Lease Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee Lease Description [Line Items]
Remaining lease term	14 years
Maximum | Yard
Lessee Lease Description [Line Items]
Lease renewal term	5 years

XML

Inventories - Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Inventory Disclosure [Abstract]
Raw materials	$ 106,097	$ 108,206
Finished goods	299,312	355,788
Total inventories	$ 405,409	$ 463,994

XML

Net Income Per Share and Stockholders' Equity - Summary of Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
NET INCOME PER SHARE—BASIC:
Net income available to common stockholders – Basic	$ 105,639	$ 82,040	$ 415,093	$ 421,193
Weighted average number of common shares outstanding – Basic (in shares)	77,857	82,067	78,455	82,891
Net income per common share - Basic (in dollars per share)	$ 1.36	$ 1.00	$ 5.29	$ 5.08
NET INCOME PER SHARE—DILUTED:
Net income available to common stockholders – Diluted	$ 105,639	$ 82,040	$ 415,093	$ 421,193
Weighted average number of common shares outstanding – Basic (in shares)	77,857	82,067	78,455	82,891
Weighted average number of common shares outstanding – Diluted (in shares)	78,586	82,987	79,188	83,980
Net income per common share - Diluted (in dollars per share)	$ 1.34	$ 0.99	$ 5.24	$ 5.02
Potentially dilutive securities excluded as anti-dilutive (in shares)	19	42	46	45
Assumed restricted stock
NET INCOME PER SHARE—DILUTED:
Dilutive securities (in shares)	75	114	60	131
Assumed exercise of stock options
NET INCOME PER SHARE—DILUTED:
Dilutive securities (in shares)	595	626	597	702
Assumed performance units
NET INCOME PER SHARE—DILUTED:
Dilutive securities (in shares)	59	180	76	256

XML

Related Party Transactions (Detail) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2023	Mar. 31, 2023	Jun. 06, 2022
South American Joint Venture
Related Party Transaction [Line Items]
Maximum borrowings permitted under credit facility	$ 11.0
Company's ownership percentage	50.00%
Percentage of debt guarantee	50.00%
Maximum potential payment under guarantee	$ 5.5
Outstanding principal balance including letters of credit	0.0	$ 5.5
Consolidated Entity, Excluding Consolidated VIE
Related Party Transaction [Line Items]
Maximum borrowings permitted under credit facility			$ 9.5
Maximum borrowings permitted under credit facility	$ 0.0
Consolidated Entity, Excluding Consolidated VIE | ADS Mexicana
Related Party Transaction [Line Items]
Company's ownership percentage	51.00%
Percentage of ownership in joint venture			49.00%

XML

Debt - Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Debt Instrument [Line Items]
Long-term debt , gross	$ 1,284,287	$ 1,295,888
Less: Unamortized debt issuance costs	10,270	11,804
Less: Current maturities	12,275	14,693
Long-term debt obligations	1,261,742	1,269,391
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt , gross	0	0
Term Loan Facility
Debt Instrument [Line Items]
Long-term debt , gross	422,000	427,250
Senior Notes | Senior Notes due 2027
Debt Instrument [Line Items]
Long-term debt , gross	350,000	350,000
Senior Notes | Senior Notes due 2030
Debt Instrument [Line Items]
Long-term debt , gross	500,000	500,000
Equipment Financing
Debt Instrument [Line Items]
Long-term debt , gross	12,287	$ 18,638
Less: Current maturities	5,300
Long-term debt obligations	$ 7,000

XML

Debt - Senior Secured Credit Facility (Detail) $ in Millions	1 Months Ended
	May 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2019 USD ($)
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	$ 600.0			$ 350.0
Leverage ratio, maximum for variable rate step-down	2.00
Outstanding letters of credit		$ 11.2	$ 9.7
Revolving Credit Facility | Term Benchmark Based Loans Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%
Revolving Credit Facility | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.75%
Sublimit of Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowings permitted under credit facility	$ 60.0			$ 50.0

XML

Debt - Senior Notes (Detail) - USD ($) $ in Millions	Jun. 09, 2022	Sep. 23, 2019
Senior Notes due 2027
Debt Instrument [Line Items]
Aggregate principal amount		$ 350.0
Debt instrument, interest rate		5.00%
Senior Notes due 2030
Debt Instrument [Line Items]
Aggregate principal amount	$ 500.0
Debt instrument, interest rate	6.375%

XML

Debt - Equipment Financing (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2023	Mar. 31, 2023
Debt Instrument [Line Items]
Current maturities of debt obligations	$ 12,275	$ 14,693
Long-term debt obligations	$ 1,261,742	$ 1,269,391
Equipment Financing
Debt Instrument [Line Items]
Weighted average interest rate of equipment financing	1.60%
Current maturities of debt obligations	$ 5,300
Long-term debt obligations	$ 7,000
Minimum | Equipment Financing
Debt Instrument [Line Items]
Equipment financing term	12 months
Maximum | Equipment Financing
Debt Instrument [Line Items]
Equipment financing term	84 months

XML

Debt - Valuation of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
Fair Value
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	$ 858,898	$ 848,496
Fair Value | Equipment Financing
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	11,940	17,921
Carrying Value
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	862,287	868,638
Carrying Value | Equipment Financing
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	12,287	18,638
Senior Notes due 2027 | Fair Value | Senior Notes
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	340,883	333,970
Senior Notes due 2027 | Carrying Value | Senior Notes
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	350,000	350,000
Senior Notes due 2030 | Fair Value | Senior Notes
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	506,075	496,605
Senior Notes due 2030 | Carrying Value | Senior Notes
Debt Instrument [Line Items]
Fair value of senior notes and equipment financing	$ 500,000	$ 500,000

XML

Commitments and Contingencies (Detail) - Inventory	9 Months Ended
	Dec. 31, 2023 USD ($)
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Total purchase commitment	$ 0
Minimum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitment contract period	1 month
Maximum
Purchase Commitment, Excluding Long-term Commitment [Line Items]
Purchase commitment contract period	12 months

XML

Income Taxes (Detail)	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Effective income tax rate	22.20%	24.00%	24.30%	23.40%

XML

Stock-Based Compensation - Summary of Stock-based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	$ 7,402	$ 6,179	$ 23,636	$ 19,912
Non-Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	543	563	1,655	1,497
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	1,305	1,035	4,046	3,316
Assumed performance units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	2,050	1,754	6,131	5,480
Performance-based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	3,191	2,827	11,110	9,619
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	313	0	694	0
Cost of goods sold
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	1,316	743	3,473	2,175
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Additional stock-based compensation expense	$ 6,086	$ 5,436	$ 20,163	$ 17,737

XML

Stock-Based Compensation (2017 Omnibus Plan) - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	May 24, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards	$ (48)	$ (3,140)	$ (2,462)	$ (5,631)
Employee Stock Purchase Plan Maximum Shares in Offering Period [Domain]	400,000		400,000
Employee Stock Purchase Plan Purchase Discount			85.00%
2017 Omnibus Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock awards (in shares)			100,000
Restricted stock awards			$ 13,200
2017 Omnibus Plan | Performance-based Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of performance units granted (in shares)			100,000
Number of performance units granted, value			$ 8,700
2017 Omnibus Plan | Assumed exercise of stock options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of stock options granted (in shares)			200,000
Number of stock options granted, value			$ 7,500
2017 Omnibus Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock approved for issuance (in shares)					5,000,000

XML

Stock-Based Compensation - Summary of Assumption Used to Estimate Fair Value of Stock Options (Detail)	9 Months Ended
	Dec. 31, 2023 $ / shares
Share-Based Payment Arrangement [Abstract]
Common stock price (in dollars per share)	$ 96.51
Expected stock price volatility	45.60%
Risk-free interest rate	3.80%
Weighted-average expected option life (years)	6 years
Dividend yield	0.58%

XML

Business Segments Information - Additional Information (Detail)	9 Months Ended
	Dec. 31, 2023 segment
Segment Reporting [Abstract]
Number of reportable segments	3

XML

Business Segments Information - Schedule of Revenue from Reportable Segments by Product Type (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net Sales	$ 662,367	$ 655,167	$ 2,220,633	$ 2,453,562
Operating Segments
Segment Reporting Information [Line Items]
Net Sales	(47,041)	(32,448)	(111,909)	(122,999)
Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	47,041	32,448	111,909	122,999
Pipe
Segment Reporting Information [Line Items]
Net Sales	346,053	364,880	1,180,328	1,370,071
Pipe | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	360,733	375,719	1,217,302	1,401,554
Pipe | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(14,680)	(10,839)	(36,974)	(31,483)
Infiltrator
Segment Reporting Information [Line Items]
Net Sales	103,871	88,934	342,956	354,603
Infiltrator | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	131,144	103,895	406,361	420,920
Infiltrator | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(27,273)	(14,961)	(63,405)	(66,317)
International
Segment Reporting Information [Line Items]
Net Sales	55,999	53,646	176,632	185,425
International | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	58,369	58,957	180,576	203,934
International | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(2,370)	(5,311)	(3,944)	(18,509)
International | International - Pipe
Segment Reporting Information [Line Items]
Net Sales	41,834	39,571	129,870	136,253
International | International - Pipe | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	44,203	44,882	133,787	154,762
International | International - Pipe | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(2,369)	(5,311)	(3,917)	(18,509)
International | International - Allied Products & Other
Segment Reporting Information [Line Items]
Net Sales	14,165	14,075	46,762	49,172
International | International - Allied Products & Other | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	14,166	14,075	46,789	49,172
International | International - Allied Products & Other | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	(1)		(27)
Allied Products & Other
Segment Reporting Information [Line Items]
Net Sales	156,444	147,707	520,717	543,463
Allied Products & Other | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	159,162	149,044	528,303	550,153
Allied Products & Other | Intersegment Eliminations
Segment Reporting Information [Line Items]
Net Sales	$ (2,718)	$ (1,337)	$ (7,586)	$ (6,690)

XML

Business Segments Information - Schedule of Financial Information Attributable to Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Segment Adjusted Gross Profit	$ 284,253	$ 245,233	$ 965,968	$ 959,837
Depreciation and Amortization	38,053	35,846	112,014	107,346
Capital Expenditures	53,760	51,313	136,385	126,858
Operating Segments | Pipe
Segment Reporting Information [Line Items]
Segment Adjusted Gross Profit	115,621	106,279	402,126	421,011
Depreciation and Amortization	15,491	12,754	43,882	38,754
Capital Expenditures	31,287	28,268	84,700	75,565
Operating Segments | Infiltrator
Segment Reporting Information [Line Items]
Segment Adjusted Gross Profit	68,392	46,497	216,319	193,569
Depreciation and Amortization	5,543	5,120	16,435	15,014
Capital Expenditures	2,962	12,810	14,458	33,856
Operating Segments | International
Segment Reporting Information [Line Items]
Segment Adjusted Gross Profit	14,012	13,342	51,380	51,456
Depreciation and Amortization	1,195	1,369	3,669	4,023
Capital Expenditures	1,872	2,366	4,807	4,393
Operating Segments | Allied Products & Other
Segment Reporting Information [Line Items]
Segment Adjusted Gross Profit	88,150	78,401	300,574	293,472
Depreciation and Amortization	15,824	16,603	48,028	49,555
Capital Expenditures	17,639	7,869	32,420	13,044
Intersegment Eliminations
Segment Reporting Information [Line Items]
Segment Adjusted Gross Profit	$ (1,922)	$ 714	$ (4,431)	$ 329

XML

Business Segments Information - Reconciliation of Gross Profit to Segment Adjusted Gross Profit (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit	$ 259,849	$ 223,917	$ 893,986	$ 895,987
Total Segment Adjusted Gross Profit	284,253	245,233	965,968	959,837
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Depreciation and Amortization	23,088	20,573	68,509	61,675
Stock-based compensation expense	$ 1,316	$ 743	$ 3,473	$ 2,175

XML

Statement of Cash Flows, Supplemental Disclosures (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]
Cash paid for income taxes	$ 114,712	$ 136,320
Cash paid for interest	51,484	24,757
Repurchase of common stock pending settlement	1,139	0
Excise tax accrual, share repurchase	1,486	0
Acquisition of property, plant and equipment under finance lease	21,061	10,684
Balance in accounts payable for the acquisition of property, plant and equipment	$ 22,925	$ 14,748

XML

Subsequent Events (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 08, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Subsequent Event [Line Items]
Common stock dividends per share (in dollars per share)		$ 0.14	$ 0.12	$ 0.42	$ 0.36
Stock repurchased during period		$ 70,905	$ 179,864	$ 180,812	$ 375,027
Subsequent Event
Subsequent Event [Line Items]
Common stock dividends per share (in dollars per share)	$ 0.14
Share repurchases (in shares)	0.1
Stock repurchased during period	$ 13,100

XML

Label	Element	Value
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	$ (20,346,000)
Parent [Member]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	(20,346,000)
Treasury Stock, Common [Member]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	$ (20,351,000)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation	205,000
Common Stock [Member]
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation	$ 5,000
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation	527,000