10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC  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 March 31, 2021

OR

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

For the transition period from                         to

Commission File No.  000-29961

ALLIANCEBERNSTEIN L.P.

(Exact name of registrant as specified in its charter)

Delaware	13-4064930
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

1345 Avenue of the Americas, New York, NY  10105

(Address of principal executive offices)

(Zip Code)

(212) 969-1000

(Registrant’s telephone number, including area code)

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, smaller reporting company, or an emerging growth company. See definition 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 ☒

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

Title of Each Class	Trading Symbol	Name of Each Exchange on Which Registered
None	None	None

The number of units of limited partnership interest outstanding as of March 31, 2021 was 272,675,165.

ALLIANCEBERNSTEIN L.P.

Index to Form 10-Q

		Page
	Part I
	FINANCIAL INFORMATION
Item 1.	Financial Statements
	Condensed Consolidated Statements of Financial Condition	1
	Condensed Consolidated Statements of Income	3
	Condensed Consolidated Statements of Comprehensive Income	4
	Condensed Consolidated Statements of Changes in Partners' Capital	5
	Condensed Consolidated Statements of Cash Flows	6
	Notes to Condensed Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	28
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	50
Item 4.	Controls and Procedures	50
	Part II
	OTHER INFORMATION
Item 1.	Legal Proceedings	51
Item 1A.	Risk Factors	51
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	51
Item 3.	Defaults Upon Senior Securities	51
Item 4.	Mine Safety Disclosures	51
Item 5.	Other Information	51
Item 6.	Exhibits	52
SIGNATURE		53

Part I

FINANCIAL INFORMATION

Item 1.    Financial Statements

ALLIANCEBERNSTEIN L.P.

AND SUBSIDIARIES

Condensed Consolidated Statements of Financial Condition

(in thousands, except unit amounts)

(unaudited)

	March 31, 2021		December 31, 2020
ASSETS
Cash and cash equivalents	$	960,452	$	1,037,400
Cash and securities segregated, at fair value (cost: $1,412,296 and $1,752,483)	1,412,873		1,753,478
Receivables, net:
Brokers and dealers	197,444		92,638
Brokerage clients	1,814,044		1,713,377
AB funds fees	260,598		325,407
Other fees	143,819		148,746
Investments:
Long-term incentive compensation-related	58,730		60,114
Other	140,928		193,261
Assets of consolidated company-sponsored investment funds:
Cash and cash equivalents	38,561		36,506
Investments	308,043		302,582
Other assets	20,474		12,244
Furniture, equipment and leasehold improvements, net	153,326		147,874
Goodwill	3,095,093		3,082,778
Intangible assets, net	42,843		44,496
Deferred sales commissions, net	67,119		64,066
Right-of-use assets	412,839		418,455
Other assets	327,680		264,418
Total assets	$	9,454,866	$	9,697,840
LIABILITIES, REDEEMABLE NON-CONTROLLING INTEREST AND CAPITAL
Liabilities:
Payables:
Brokers and dealers	$	278,936	$	216,403
Securities sold not yet purchased	8,307		17,791
Brokerage clients	3,176,132		3,440,266
AB mutual funds	86,002		65,550
Accounts payable and accrued expenses	202,366		197,657
Lease liabilities	495,356		505,549
Liabilities of consolidated company-sponsored investment funds	42,531		30,620
Accrued compensation and benefits	402,507		335,122
Debt	625,000		675,000
Total liabilities	5,317,137		5,483,958

1

	March 31, 2021		December 31, 2020
Commitments and contingencies (See Note 12)
Redeemable non-controlling interest	88,567		102,359
Capital:
General Partner	42,022		41,776
Limited partners: 272,675,165 and 270,509,658 units issued and outstanding	4,253,904		4,229,485
Receivables from affiliates	(1,725)		(8,316)
AB Holding Units held for long-term incentive compensation plans	(143,807)		(57,219)
Accumulated other comprehensive loss	(101,232)		(94,203)
Partners’ capital attributable to AB Unitholders	4,049,162		4,111,523
Total liabilities, redeemable non-controlling interest and capital	$	9,454,866	$	9,697,840

See Accompanying Notes to Condensed Consolidated Financial Statements.

2

ALLIANCEBERNSTEIN L.P.

AND SUBSIDIARIES

Condensed Consolidated Statements of Income

(in thousands, except per unit amounts)

(unaudited)

	Three Months Ended March 31,
	2021		2020
Revenues:
Investment advisory and services fees	$	703,466	$	621,725
Bernstein research services	119,021		129,223
Distribution revenues	147,600		130,857
Dividend and interest income	8,684		20,465
Investment gains (losses)	1,928		(44,306)
Other revenues	27,711		25,511
Total revenues	1,008,410		883,475
Less: Interest expense	1,144		9,319
Net revenues	1,007,266		874,156
Expenses:
Employee compensation and benefits	406,059		362,272
Promotion and servicing:
Distribution-related payments	162,254		140,145
Amortization of deferred sales commissions	7,899		5,526
Trade execution, marketing, T&E and other	46,678		55,610
General and administrative	120,223		122,267
Contingent payment arrangements	796		793
Interest on borrowings	1,294		2,834
Amortization of intangible assets	1,479		6,486
Total expenses	746,682		695,933
Operating income	260,584		178,223
Income taxes	16,745		9,474
Net income	243,839		168,749
Net (loss) of consolidated entities attributable to non-controlling interests	(292)		(25,571)
Net income attributable to AB Unitholders	$	244,131	$	194,320
Net income per AB Unit:
Basic	$	0.89	$	0.71
Diluted	$	0.89	$	0.71

See Accompanying Notes to Condensed Consolidated Financial Statements.

3

ALLIANCEBERNSTEIN L.P.

AND SUBSIDIARIES

Condensed Consolidated Statements of Comprehensive Income

(in thousands)

(unaudited)

	Three Months Ended March 31,
	2021		2020
Net income	$	243,839	$	168,749
Other comprehensive (loss):
Foreign currency translation adjustments, before tax	(7,138)		(21,396)
Income tax benefit	22		73
Foreign currency translation adjustments, net of tax	(7,116)		(21,323)
Changes in employee benefit related items:
Amortization of prior service cost	6		6
Recognized actuarial gain	81		325
Changes in employee benefit related items	87		331
Income tax (expense)	—		(77)
Employee benefit related items, net of tax	87		254
Other comprehensive (loss)	(7,029)		(21,069)
Less: Comprehensive (loss) in consolidated entities attributable to non-controlling interests	(292)		(25,571)
Comprehensive income attributable to AB Unitholders	$	237,102	$	173,251

See Accompanying Notes to Condensed Consolidated Financial Statements.

4

ALLIANCEBERNSTEIN L.P.

AND SUBSIDIARIES

Condensed Consolidated Statements of Changes in Partners' Capital

(in thousands)

(unaudited)

	Three Months Ended March 31,
	2021		2020
General Partner’s Capital
Balance, beginning of period	$	41,776	$	41,225
Net income	2,441		1,943
Cash distributions to General Partner	(2,898)		(2,542)
Long-term incentive compensation plans activity	(7)		2
Issuance (retirement) of AB Units, net	710		(57)
Balance, end of period	42,022		40,571
Limited Partners' Capital
Balance, beginning of period	4,229,485		4,174,201
Net income	241,690		192,377
Cash distributions to Unitholders	(286,813)		(251,261)
Long-term incentive compensation plans activity	(708)		335
Issuance (retirement) of AB Units, net	70,250		(5,706)
Balance, end of period	4,253,904		4,109,946
Receivables from Affiliates
Balance, beginning of period	(8,316)		(9,011)
Long-term incentive compensation awards expense	142		184
Capital contributions from AB Holding	6,449		(452)
Balance, end of period	(1,725)		(9,279)
AB Holding Units held for Long-term Incentive Compensation Plans
Balance, beginning of period	(57,219)		(76,310)
Purchases of AB Holding Units to fund long-term compensation plans, net	(35,854)		(17,750)
(Issuance) retirement of AB Units, net	(71,013)		5,763
Long-term incentive compensation awards expense	18,002		7,407
Re-valuation of AB Holding Units held in rabbi trust	2,277		(436)
Other	—		12
Balance, end of period	(143,807)		(81,314)
Accumulated Other Comprehensive Income (Loss)
Balance, beginning of period	(94,203)		(113,004)
Foreign currency translation adjustment, net of tax	(7,116)		(21,323)
Changes in employee benefit related items, net of tax	87		254
Balance, end of period	(101,232)		(134,073)
Total Partners' Capital attributable to AB Unitholders	4,049,162		3,925,851

See Accompanying Notes to Condensed Consolidated Financial Statements.

5

ALLIANCEBERNSTEIN L.P. AND SUBSIDIARIES

Condensed Consolidated Statements of Cash Flows

(in thousands)

(unaudited)

	Three Months Ended March 31,
	2021		2020
Cash flows from operating activities:
Net income	$	243,839	$	168,749
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred sales commissions	7,899		5,526
Non-cash long-term incentive compensation expense	18,144		7,591
Depreciation and other amortization	32,009		36,156
Unrealized (gains) losses on investments	(175)		20,585
Unrealized losses on investments of consolidated company-sponsored investment funds	6,941		52,115
Other, net	10,181		(1,324)
Changes in assets and liabilities:
Decrease (increase) in securities, segregated	340,605		(917,696)
(Increase) in receivables	(117,622)		(615,055)
Decrease (increase) in investments	53,493		(17,557)
(Increase) decrease in investments of consolidated company-sponsored investment funds	(12,401)		85,418
(Increase) in deferred sales commissions	(10,952)		(18,510)
(Increase) decrease in right-of-use assets	(15,979)		134
(Increase) in other assets	(68,957)		(118,038)
Increase in other assets and liabilities of consolidated company-sponsored investment funds, net	3,681		54,129
(Decrease) increase in payables	(218,887)		1,492,200
(Decrease) in lease liabilities	(9,163)		(23,968)
(Decrease) increase in accounts payable and accrued expenses	(1,566)		4,663
Increase in accrued compensation and benefits	66,909		70,792
Net cash provided by operating activities	327,999		285,910
Cash flows from investing activities:
Purchases of furniture, equipment and leasehold improvements	(15,584)		(3,321)
Acquisition of business, net of cash acquired	(3,795)		(11,473)
Net cash used in investing activities	(19,379)		(14,794)

6

	Three Months Ended March 31,
	2021		2020
Cash flows from financing activities:
(Repayment) borrowings of debt, net	(50,000)		374,814
(Decrease) increase in overdrafts payable	(1,190)		85,395
Distributions to General Partner and Unitholders	(289,711)		(253,803)
(Redemptions) of non-controlling interest in consolidated company-sponsored investment funds, net	(13,500)		(75,091)
Capital contributions from (to) affiliates	6,096		(699)
Interest accretion, net of (payments) on contingent payment arrangements	796		793
Additional investments by AB Holding with proceeds from exercise of compensatory options to buy AB Holding Units	1,914		147
Purchases of AB Holding Units to fund long-term incentive compensation plan awards, net	(35,854)		(17,750)
Other	(475)		(504)
Net cash (used in) provided by financing activities	(381,924)		113,302
Effect of exchange rate changes on cash and cash equivalents	(1,589)		(13,049)
Net (decrease) increase in cash and cash equivalents	(74,893)		371,369
Cash and cash equivalents as of beginning of the period	1,073,906		691,171
Cash and cash equivalents as of end of the period	$	999,013	$	1,062,540
Non-cash investing activities:
Fair value of assets acquired (less cash acquired of $2.8 million and $0.6 million, respectively)	$	12,962	$	11,908
Fair value of liabilities assumed	$	1,642	$	435
Non-cash financing activities:
Payables recorded under contingent payment arrangements	$	7,525	$	—

See Accompanying Notes to Condensed Consolidated Financial Statements.

7

ALLIANCEBERNSTEIN L.P.

AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements

March 31, 2021

(unaudited)

The words “we” and “our” refer collectively to AllianceBernstein L.P. and its subsidiaries (“AB”), or to their officers and employees. Similarly, the word “company” refers to AB. These statements should be read in conjunction with AB’s audited consolidated financial statements included in AB’s Form 10-K for the year ended December 31, 2020.

1. Business Description Organization and Basis of Presentation

Business Description

We provide diversified investment management, research and related services globally to a broad range of clients. Our principal services include:

•    Institutional Services – servicing our institutional clients, including private and public pension plans, foundations and endowments, insurance companies, central banks and governments worldwide, and affiliates such as Equitable Holdings, Inc. ("EQH") and its subsidiaries, by means of separately-managed accounts, sub-advisory relationships, structured products, collective investment trusts, mutual funds, hedge funds and other investment vehicles.

•    Retail Services – servicing our retail clients, primarily by means of retail mutual funds sponsored by AB or an affiliated company, sub-advisory relationships with mutual funds sponsored by third parties, separately-managed account programs sponsored by financial intermediaries worldwide and other investment vehicles.

•    Private Wealth Management Services – servicing our private clients, including high-net-worth individuals and families, trusts and estates, charitable foundations, partnerships, private and family corporations, and other entities, by means of separately-managed accounts, hedge funds, mutual funds and other investment vehicles.

•Bernstein Research Services – servicing institutional investors, such as pension fund, hedge fund and mutual fund managers, seeking high-quality fundamental research, quantitative services and brokerage-related services in equities and listed options.

We also provide distribution, shareholder servicing, transfer agency services and administrative services to the mutual funds we sponsor.

Our high-quality, in-depth research is the foundation of our business. Our research disciplines include economic, fundamental equity, fixed income and quantitative research.  In addition, we have expertise in multi-asset strategies, wealth management, environmental, social and corporate governance ("ESG"), and alternative investments.

We provide a broad range of investment services with expertise in:

•Actively-managed equity strategies, with global and regional portfolios across capitalization ranges, concentration ranges and investment strategies, including value, growth and core equities;

•Actively-managed traditional and unconstrained fixed income strategies, including taxable and tax-exempt strategies;

•Alternative investments, including hedge funds, fund of funds, direct lending, real estate and private equity;

•Multi-asset solutions and services, including dynamic asset allocation, customized target-date funds and target-risk funds; and

•Some passive management, including index and enhanced index strategies.

8

Organization

As of March 31, 2021, EQH owned approximately 4.0% of the issued and outstanding units representing assignments of beneficial ownership of limited partnership interests in AllianceBernstein Holding L.P. (“AB Holding Units”). AllianceBernstein Corporation (an indirect wholly-owned subsidiary of EQH, “General Partner”) is the general partner of both AllianceBernstein Holding L.P. (“AB Holding”) and AB. AllianceBernstein Corporation owns 100,000 general partnership units in AB Holding and a 1% general partnership interest in AB.

As of March 31, 2021, the ownership structure of AB, including limited partnership units outstanding as well as the general partner's 1% interest, was as follows:

EQH and its subsidiaries	62.8	%
AB Holding	36.5
Unaffiliated holders	0.7
	100.0	%

Including both the general partnership and limited partnership interests in AB Holding and AB, EQH and its subsidiaries had an approximate 64.3% economic interest in AB as of March 31, 2021.

Basis of Presentation

The interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). In the opinion of management, all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the interim results, have been made. The preparation of the condensed consolidated financial statements requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the interim reporting periods. Actual results could differ from those estimates. The condensed consolidated statement of financial condition as of December 31, 2020 was derived from audited financial statements. Certain disclosures included in the annual financial statements have been condensed or omitted from these financial statements as they are not required for interim financial statements under principles generally accepted in the United States of America ("GAAP") and the rules of the Securities and Exchange Commission.

Principles of Consolidation

The condensed consolidated financial statements include AB and its majority-owned and/or controlled subsidiaries, and the consolidated entities that are considered to be variable interest entities (“VIEs”) and voting interest entities (“VOEs”) in which AB has a controlling financial interest. Non-controlling interests on the condensed consolidated statements of financial condition include the portion of consolidated company-sponsored investment funds in which we do not have direct equity ownership. All significant inter-company transactions and balances among the consolidated entities have been eliminated.

Reclassifications

During 2021, prior period amounts previously presented as net issuance (repayment) of commercial paper, proceeds (repayment) of EQH facility and proceeds (repayment) of bank loans are now combined and presented as net repayments (borrowings) of debt in the condensed consolidated statements of cash flows to conform to the current period's presentation.

9

2.     Significant Accounting Policies

Recently Adopted Accounting Pronouncements

In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Topic 715-20). The amendment modifies the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans. We adopted this standard prospectively on January 1, 2021. The adoption of this standard did not have a material impact on our financial condition or results of operations.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify US GAAP for other areas of Topic 740 by clarifying and amending the existing guidance. We adopted this standard prospectively on January 1, 2021. The adoption of this standard did not have a material impact on our financial condition or results of operations.

3. Revenue Recognition

Revenues for the three months ended March 31, 2021 and 2020 consisted of the following:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Subject to contracts with customers:
Investment advisory and services fees
Base fees	$	687,691	$	613,587
Performance-based fees	15,775		8,138
Bernstein research services	119,021		129,223
Distribution revenues
All-in-management fees	85,182		86,357
12b-1 fees	20,034		19,453
Other	42,384		25,047
Other revenues
Shareholder servicing fees	21,695		20,843
Other	5,683		4,672
	997,465		907,320
Not subject to contracts with customers:
Dividend and interest income, net of interest expense	7,540		11,146
Investment gains (losses)	1,928		(44,306)
Other revenues	333		(4)
	9,801		(33,164)
Total net revenues	$	1,007,266	$	874,156

4.    Long-term Incentive Compensation Plans

We maintain several unfunded, non-qualified long-term incentive compensation plans, under which we grant annual awards to employees, generally in the fourth quarter, and to members of the Board of Directors of the General Partner, who are not employed by our company or by any of our affiliates (“Eligible Directors”).

We fund our restricted AB Holding Unit awards either by purchasing AB Holding Units on the open market or purchasing newly-issued AB Holding Units from AB Holding, and then keeping these AB Holding Units in a consolidated rabbi trust until delivering them or retiring them. In accordance with the Amended and Restated Agreement of Limited Partnership of AB (“AB Partnership Agreement”), when AB purchases newly-issued AB Holding Units from AB Holding, AB Holding is

10

required to use the proceeds it receives from AB to purchase the equivalent number of newly-issued AB Units, thus increasing its percentage ownership interest in AB. AB Holding Units held in the consolidated rabbi trust are corporate assets in the name of the trust and are available to the general creditors of AB.

Repurchases of AB Holding Units for the three months ended March 31, 2021 and 2020 consisted of the following:

	Three Months Ended March 31,
	2021		2020
	(in millions)
Total amount of AB Holding Units Purchased (1)	1.0		0.9
Total Cash Paid for AB Holding Units Purchased (1)	$	37.4	$	19.8
Open Market Purchases of AB Holding Units Purchased (2)	0.6		0.8
Total Cash Paid for Open Market Purchases of AB Holding Units (2)	$	24.2	$	17.3

(1) Purchased on a trade date basis.

(2) The remainder related to purchases of AB Holding Units from employees to fulfill statutory tax withholding requirements at the time of delivery of long-term incentive compensation award.

Purchases of AB Holding Units reflected on the condensed consolidated statements of cash flows are net of AB Holding Unit purchases by employees as part of a distribution reinvestment election.

Each quarter, we consider whether to implement a plan to repurchase AB Holding Units pursuant to Rules 10b5-1 and 10b-18 under the Securities Exchange Act of 1934, as amended ("Exchange Act"). A plan of this type allows a company to repurchase its shares at times when it otherwise might be prevented from doing so because of self-imposed trading blackout periods or because it possesses material non-public information. Each broker we select has the authority under the terms and limitations specified in the plan to repurchase AB Holding Units on our behalf. Repurchases are subject to regulations promulgated by the SEC as well as certain price, market volume and timing constraints specified in the plan. The plan adopted during the first quarter of 2021 expired at the close of business on April 28, 2021. We may adopt additional plans in the future to engage in open-market purchases of AB Holding Units to help fund anticipated obligations under our incentive compensation award program and for other corporate purposes.

During the first three months of 2021 and 2020, we awarded to employees and Eligible Directors 3.4 million and 0.1 million restricted AB Holding Unit awards, respectively. We used AB Holding Units repurchased during the applicable period and newly-issued AB Holding Units to fund these awards.

During the first three months of 2021 and 2020, AB Holding issued 0.1 million and 5,182 AB Holding Units, respectively, upon exercise of options to buy AB Holding Units. AB Holding used the proceeds of $1.9 million and $0.1 million, respectively, received from award recipients as payment in cash for the exercise price to purchase the equivalent number of newly-issued AB Units.

5.     Net Income per Unit

Basic net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the basic weighted average number of limited partnership units outstanding for each period. Diluted net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the total of the diluted weighted average number of limited partnership units outstanding for each period.

	Three Months Ended March 31,
	2021		2020
	(in thousands, except per unit amounts)
Net income attributable to AB Unitholders	$	244,131	$	194,320
Weighted average limited partnership units outstanding – basic	272,332		270,498
Dilutive effect of compensatory options to buy AB Holding Units	32		32
Weighted average limited partnership units outstanding – diluted	272,364		270,530
Basic net income per AB Unit	$	0.89	$	0.71
Diluted net income per AB Unit	$	0.89	$	0.71

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		Three Months Ended March 31,
		2021	2020
	(amounts as shown)
Anti-dilutive options excluded from diluted net income		—	29,056

6. Cash Distributions

AB is required to distribute all of its Available Cash Flow, as defined in the AB Partnership Agreement, to its Unitholders and to the General Partner. Available Cash Flow can be summarized as the cash flow received by AB from operations minus such amounts as the General Partner determines, in its sole discretion, should be retained by AB for use in its business, or plus such amounts as the General Partner determines, in its sole discretion, should be released from previously retained cash flow.

Typically, Available Cash Flow has been the adjusted diluted net income per unit for the quarter multiplied by the number of general and limited partnership interests at the end of the quarter. In future periods, management anticipates that Available Cash Flow will be based on adjusted diluted net income per unit, unless management determines, with the concurrence of the Board of Directors, that one or more adjustments that are made for adjusted net income should not be made with respect to the Available Cash Flow calculation.

On April 29, 2021, the General Partner declared a distribution of $0.88 per AB Unit, representing a distribution of Available Cash Flow for the three months ended March 31, 2021. The General Partner, as a result of its 1% general partnership interest, is entitled to receive 1% of each distribution. The distribution is payable on May 27, 2021 to holders of record on May 10, 2021.

7.     Cash and Securities Segregated Under Federal Regulations and Other Requirements

As of March 31, 2021 and December 31, 2020, $1.4 billion and $1.8 billion, respectively, of U.S. Treasury Bills were segregated in a special reserve bank custody account for the exclusive benefit of our brokerage customers under Rule 15c3-3 of the Exchange Act.

8.     Investments

Investments consist of:

	March 31, 2021		December 31, 2020
	(in thousands)
Equity securities:
Long-term incentive compensation-related	$	28,645	$	34,351
Seed capital	74,241		75,766
Other	11,469		55,439
Exchange-traded options	4,156		7,527
Investments in limited partnership hedge funds:
Long-term incentive compensation-related	30,085		25,762
Seed capital	17,363		16,646
Time deposits	18,233		18,602
Other	15,466		19,282
Total investments	$	199,658	$	253,375

Total investments related to long-term incentive compensation obligations of $58.7 million and $60.1 million as of March 31, 2021 and December 31, 2020, respectively, consist of company-sponsored mutual funds and hedge funds. For long-term incentive compensation awards granted before 2009, we typically made investments in company-sponsored mutual funds and hedge funds that were notionally elected by plan participants and maintained them (and continue to maintain them) in a consolidated rabbi trust or separate custodial account. The rabbi trust and custodial account enable us

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to hold such investments separate from our other assets for the purpose of settling our obligations to participants. The investments held in the rabbi trust and custodial account remain available to the general creditors of AB.

The underlying investments of hedge funds in which we invest include long and short positions in equity securities, fixed income securities (including various agency and non-agency asset-based securities), currencies, commodities and derivatives (including various swaps and forward contracts). These investments are valued at quoted market prices or, where quoted market prices are not available, are fair valued based on the pricing policies and procedures of the underlying funds.

We allocate seed capital to our investment teams to help develop new products and services for our clients. A portion of our seed capital trading investments are equity and fixed income products, primarily in the form of separately-managed account portfolios, U.S. mutual funds, Luxembourg funds, Japanese investment trust management funds or Delaware business trusts. We also may allocate seed capital to investments in private equity funds. In regard to our seed capital investments, the amounts above reflect those funds in which we are not the primary beneficiary of a VIE or hold a controlling financial interest in a VOE. See Note 14, Consolidated Company-Sponsored Investment Funds, for a description of the seed capital investments that we consolidate. As of March 31, 2021 and December 31, 2020, our total seed capital investments were $327.1 million and $310.3 million, respectively. Seed capital investments in unconsolidated company-sponsored investment funds are valued using published net asset values or non-published net asset values if they are not listed on an active exchange but have net asset values that are comparable to funds with published net asset values and have no redemption restrictions.

In addition, we also have long positions in corporate equities and long exchange-traded options traded through our options desk.

The portion of unrealized gains (losses) related to equity securities, as defined by ASC 321-10, held as of March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Net gains (losses) recognized during the period	$	4,887	$	(21,986)
Less: net gains (losses) recognized during the period on equity securities sold during the period	4,565		(1,395)
Unrealized gains (losses) recognized during the period on equity securities held	$	322	$	(20,591)

9.     Derivative Instruments

See Note 14, Consolidated Company-Sponsored Investment Funds, for disclosure of derivative instruments held by our consolidated company-sponsored investment funds.

We enter into various futures, forwards, options and swaps to economically hedge certain seed capital investments.  Also, we have currency forwards that help us to economically hedge certain balance sheet exposures. In addition, our options desk trades long and short exchange-traded equity options. We do not hold any derivatives designated in a formal hedge relationship under ASC 815-10, Derivatives and Hedging.

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The notional value and fair value as of March 31, 2021 and December 31, 2020 for derivative instruments (excluding derivative instruments relating to our options desk trading activities discussed below) not designated as hedging instruments were as follows:

			Fair Value
	Notional Value		Derivative Assets		Derivative Liabilities
	(in thousands)
March 31, 2021:
Exchange-traded futures	$	146,700	$	1,962	$	678
Currency forwards	51,703		8,548		8,042
Interest rate swaps	60,997		1,670		2,425
Credit default swaps	178,035		11,369		9,430
Total return swaps	53,817		31		800
Option swaps	50,000		—		329
Total derivatives	$	541,252	$	23,580	$	21,704
December 31, 2020:
Exchange-traded futures	$	142,886	$	118	$	1,834
Currency forwards	63,906		8,576		8,451
Interest rate swaps	60,997		2,043		2,955
Credit default swaps	167,649		10,910		13,304
Total return swaps	52,061		94		1,847
Option swaps	2,486		—		2,146
Total derivatives	$	489,985	$	21,741	$	30,537

As of March 31, 2021 and December 31, 2020, the derivative assets and liabilities are included in both receivables and payables to brokers and dealers on our condensed consolidated statements of financial condition.

The gains and losses for derivative instruments (excluding our options desk trading activities discussed below) for the three months ended March 31, 2021 and 2020 recognized in investment gains (losses) in the condensed consolidated statements of income were as follows:

	Three Months Ended March 31,
	2021		2020
Exchange-traded futures	$	1,135	$	1,006
Currency forwards	1,181		658
Interest rate swaps	88		(612)
Credit default swaps	(522)		12,101
Total return swaps	(907)		15,115
Option swaps	1,361		1,298
Net gains on derivative instruments	$	2,336	$	29,566

We may be exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. We minimize our counterparty exposure through a credit review and approval process. In addition, we have executed various collateral arrangements with counterparties to the over-the-counter derivative transactions that require both pledging and accepting collateral in the form of cash. As of March 31, 2021 and December 31, 2020, we held $3.9 million and $0.4 million, respectively, of cash collateral payable to trade counterparties. This obligation to return cash is reported in payables to brokers and dealers in our condensed consolidated statements of financial condition.

Although notional amount is the most commonly used measure of volume in the derivatives market, it is not used as a measure of credit risk. Generally, the current credit exposure of our derivative contracts is limited to the net positive estimated fair value of derivative contracts at the reporting date after taking into consideration the existence of netting

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agreements and any collateral received. A derivative with positive value (a derivative asset) indicates existence of credit risk because the counterparty would owe us if the contract were closed. Alternatively, a derivative contract with negative value (a derivative liability) indicates we would owe money to the counterparty if the contract were closed. Generally, if there is more than one derivative transaction with a single counterparty, a master netting arrangement exists with respect to derivative transactions with that counterparty to provide for aggregate net settlement.

Certain of our standardized contracts for over-the-counter derivative transactions (“ISDA Master Agreements”) contain credit risk related contingent provisions pertaining to each counterparty’s credit rating. In some ISDA Master Agreements, if the counterparty’s credit rating, or in some agreements, our assets under management (“AUM”), falls below a specified threshold, either a default or a termination event permitting us or the counterparty to terminate the ISDA Master Agreement would be triggered. In all agreements that provide for collateralization, various levels of collateralization of net liability positions are applicable, depending on the credit rating of the counterparty. As of March 31, 2021 and December 31, 2020, we delivered $3.3 million and $6.4 million, respectively, of cash collateral into brokerage accounts. We report this cash collateral in cash and cash equivalents in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, we held $4.2 million and $7.5 million, respectively, of long exchange-traded equity options, which are included in other investments on our condensed consolidated statements of financial condition. In addition, as of March 31, 2021 and December 31, 2020, we held $1.3 million and $12.5 million, respectively, of short exchange-traded equity options, which are included in securities sold not yet purchased on our condensed consolidated statements of financial condition. Our options desk provides our clients with equity derivative strategies and execution for exchange-traded options on single stocks, exchange-traded funds and indices. While predominately agency-based, the options desk may commit capital to facilitate a client’s transaction. Our options desk hedges the risks associated with this activity by taking offsetting positions in equities. For the three months ended March 31, 2021 and 2020, we recognized gains of $4.8 million and $18.4 million, respectively, on equity options activity. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income.

10.     Offsetting Assets and Liabilities

See Note 14, Consolidated Company-Sponsored Investment Funds, for disclosure of offsetting assets and liabilities of our consolidated company-sponsored investment funds.

Offsetting of assets as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Securities borrowed	$	24,294	$	—	$	24,294	$	(19,526)	$	—	$	4,768
Derivatives	$	23,580	$	—	$	23,580	$	—	$	(3,890)	$	19,690
Long exchange-traded options	$	4,156	$	—	$	4,156	$	—	$	—	$	4,156
December 31, 2020:
Securities borrowed	$	7,808	$	—	$	7,808	$	(7,344)	$	—	$	464
Derivatives	$	21,741	$	—	$	21,741	$	—	$	(380)	$	21,361
Long exchange-traded options	$	7,527	$	—	$	7,527	$	—	$	—	$	7,527

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Offsetting of liabilities as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives	$	21,704	$	—	$	21,704	$	—	$	(3,338)	$	18,366
Short exchange-traded options	$	1,270	$	—	$	1,270	$	—	$	—	$	1,270
December 31, 2020:
Derivatives	$	30,537	$	—	$	30,537	$	—	$	(6,374)	$	24,163
Short exchange-traded options	$	12,486	$	—	$	12,486	$	—	$	—	$	12,486

Cash collateral, whether pledged or received on derivative instruments, is not considered material and, accordingly, is not disclosed by counterparty.

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11.     Fair Value

See Note 14, Consolidated Company-Sponsored Investment Funds, for disclosure of fair value of our consolidated company-sponsored investment funds.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date. The three broad levels of fair value hierarchy are as follows:

•    Level 1 – Quoted prices in active markets are available for identical assets or liabilities as of the reported date.

•    Level 2 – Quoted prices in markets that are not active or other pricing inputs that are either directly or indirectly observable as of the reported date.

•    Level 3 –  Prices or valuation techniques that are both significant to the fair value measurement and unobservable as of the reported date. These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Valuation of our financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
March 31, 2021:
Money markets	$	163,018	$	—	$	—	$	—	$	—	$	163,018
Securities segregated (U.S. Treasury Bills)	—		1,412,873		—		—		—		1,412,873
Derivatives	1,962		21,618		—		—		—		23,580
Investments:
Equity securities	96,524		17,548		124		159		—		114,355
Long exchange-traded options	4,156		—		—		—		—		4,156
Limited partnership hedge funds(2)	—		—		—		—		47,448		47,448
Time deposits(3)	—		—		—		—		18,233		18,233
Other investments	7,443		—		—		—		8,023		15,466
Total investments	108,123		17,548		124		159		73,704		199,658
Total assets measured at fair value	$	273,103	$	1,452,039	$	124	$	159	$	73,704	$	1,799,129
Securities sold not yet purchased:
Short equities – corporate	$	7,037	$	—	$	—	$	—	$	—	$	7,037
Short exchange-traded options	1,270		—		—		—		—		1,270
Derivatives	678		21,026		—		—		—		21,704
Contingent payment arrangements	—		—		36,073		—		—		36,073
Total liabilities measured at fair value	$	8,985	$	21,026	$	36,073	$	—	$	—	$	66,084

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	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
December 31, 2020:
Money markets	$	130,675	$	—	$	—	$	—	$	—	$	130,675
Securities segregated (U.S. Treasury Bills)	—		1,752,906		—		—		—		1,752,906
Derivatives	118		21,623		—		—		—		21,741
Investments:
Equity securities	147,705		17,565		125		161		—		165,556
Long exchange-traded options	7,527		—		—		—		—		7,527
Limited partnership hedge funds(2)	—		—		—		—		42,408		42,408
Time deposits(3)	—		—		—		—		18,602		18,602
Other investments	7,011		—		—		—		12,271		19,282
Total investments	162,243		17,565		125		161		73,281		253,375
Total assets measured at fair value	$	293,036	$	1,792,094	$	125	$	161	$	73,281	$	2,158,697
Securities sold not yet purchased:
Short equities – corporate	$	5,305	$	—	$	—	$	—	$	—	$	5,305
Short exchange-traded options	12,486		—		—		—		—		12,486
Derivatives	1,834		28,703		—		—		—		30,537
Contingent payment arrangements	—		—		27,750		—		—		27,750
Total liabilities measured at fair value	$	19,625	$	28,703	$	27,750	$	—	$	—	$	76,078

(1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient.

(2) Investments in equity method investees that are not measured at fair value in accordance with GAAP.

(3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP.

Other investments include (i) an investment in a software publishing company that does not have a readily available fair value ($2.2 million and $2.1 million as of March 31, 2021 and December 31, 2020, respectively), (ii) investment in a start-up company that does not have a readily available fair value (this investment was $0.3 million as of both March 31, 2021 and December 31, 2020), (iii) investments in equity method investees that are not measured at fair value in accordance with GAAP ($2.3 million and $6.5 million as of March 31, 2021 and December 31, 2020, respectively), and (iv) broker dealer exchange memberships that are not measured at fair value in accordance with GAAP ($3.3 million as of both March 31, 2021 and December 31, 2020).

We provide below a description of the fair value methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy:

•    Money markets: We invest excess cash in various money market funds that are valued based on quoted prices in active markets; these are included in Level 1 of the valuation hierarchy.

•    Treasury Bills: We hold U.S. Treasury Bills, which are primarily segregated in a special reserve bank custody account as required by Rule 15c3-3 of the Exchange Act. These securities are valued based on quoted yields in secondary markets and are included in Level 2 of the valuation hierarchy.

•    Equity securities: Our equity securities consist principally of company-sponsored mutual funds with NAVs and various separately-managed portfolios consisting primarily of equity and fixed income mutual funds with quoted prices in active markets, which are included in Level 1 of the valuation hierarchy. In addition, some securities are valued based on observable inputs from recognized pricing vendors, which are included in Level 2 of the valuation hierarchy.

•    Derivatives: We hold exchange-traded futures with counterparties that are included in Level 1 of the valuation hierarchy. In addition, we also hold currency forward contracts, interest rate swaps, credit default swaps, option swaps

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and total return swaps with counterparties that are valued based on observable inputs from recognized pricing vendors, which are included in Level 2 of the valuation hierarchy.

•    Options: We hold long exchange-traded options that are included in Level 1 of the valuation hierarchy.

•    Securities sold not yet purchased: Securities sold not yet purchased, primarily reflecting short positions in equities and exchange-traded options, are included in Level 1 of the valuation hierarchy.

•    Contingent payment arrangements: Contingent payment arrangements relate to contingent payment liabilities associated with various acquisitions. At each reporting date, we estimate the fair values of the contingent consideration expected to be paid based upon probability-weighted AUM and revenue projections, using unobservable market data inputs, which are included in Level 3 of the valuation hierarchy.

During the three months ended March 31, 2021 there were no transfers between Level 2 and Level 3 securities.

The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as equity securities, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	125	$	119
Purchases	—		—
Sales	—		—
Realized gains (losses), net	—		—
Unrealized gains (losses), net	(1)		(1)
Balance as of end of period	$	124	$	118

Realized and unrealized gains and losses on Level 3 financial instruments are recorded in investment gains and losses in the condensed consolidated statements of income.

As part of acquisitions made by the Company, we may enter into contingent consideration arrangements as part of the purchase price. The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as contingent payment arrangements, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	27,750	$	22,911
Addition	7,526		—
Accretion	797		793
Payments	—		—
Balance as of end of period	$	36,073	$	23,704

The liabilities were valued using expected revenue growth rates and discount rates. As of March 31, 2021 the expected revenue growth rates range from 2.0% to 135.6%, with a weighted average of 9.0%, calculated using cumulative revenues and range of revenue growth rates (excluding revenue growth from additional AUM contributed from existing clients). The discount rates ranged from 1.9% to 20.0%, with a weighted average of 10.8%, calculated using total contingent liabilities and range of discount rates. As of March 31, 2020 the expected revenue growth rates ranged from 0.7% to 50.0%, with a weighted average of 4.9%, calculated using cumulative revenues and a range of revenue growth rates. The discount rates ranged from 3.0% to 10.0%, with a weighted average of 9.3%, calculated using total contingent liabilities and range of discount rates.

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Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

We did not have any material assets or liabilities that were measured at fair value for impairment on a nonrecurring basis during the three months ended March 31, 2021 or during the year ended December 31, 2020.

12.     Commitments and Contingencies

Legal Proceedings

With respect to all significant litigation matters, we consider the likelihood of a negative outcome. If we determine the likelihood of a negative outcome is probable and the amount of the loss can be reasonably estimated, we record an estimated loss for the expected outcome of the litigation. If the likelihood of a negative outcome is reasonably possible and we can determine an estimate of the possible loss or range of loss in excess of amounts already accrued, if any, we disclose that fact together with the estimate of the possible loss or range of loss. However, it is often difficult to predict the outcome or estimate a possible loss or range of loss because litigation is subject to inherent uncertainties, particularly when plaintiffs allege substantial or indeterminate damages. Such is also the case when the litigation is in its early stages or when the litigation is highly complex or broad in scope. In these cases, we disclose that we are unable to predict the outcome or estimate a possible loss or range of loss.

AB may be involved in various matters, including regulatory inquiries, administrative proceedings and litigation, some of which may allege significant damages. It is reasonably possible that we could incur losses pertaining to these matters, but we cannot currently estimate any such losses.

Management, after consultation with legal counsel, currently believes that the outcome of any individual matter that is pending or threatened, or all of them combined, will not have a material adverse effect on our results of operations, financial condition or liquidity. However, any inquiry, proceeding or litigation has an element of uncertainty; management cannot determine whether further developments relating to any individual matter that is pending or threatened, or all of them combined, will have a material adverse effect on our results of operation, financial condition or liquidity in any future reporting period.

13.     Leases

We lease office space, furniture and office equipment under various operating and financing leases. Our current leases have remaining lease terms of one year to 15 years, some of which include options to extend the leases for up to five years, and some of which include options to terminate the leases within one year. Since 2010, we have sub-leased over one million square feet of office space.

Leases included in the condensed consolidated statement of financial condition as of March 31, 2021 and December 31, 2020 were as follows:

	Classification	March 31, 2021		December 31, 2020
		(in thousands)
Operating Leases
Operating lease right-of-use assets	Right-of-use assets	$	407,608	$	416,007
Operating lease liabilities	Lease liabilities	490,121		503,174
Finance Leases
Property and equipment, gross	Right-of-use assets	7,329		5,167
Amortization of right-of-use assets	Right-of-use assets	(2,098)		(2,719)
Property and equipment, net		5,231		2,448
Finance lease liabilities	Lease liabilities	5,235		2,375

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The components of lease expense included in the condensed consolidated statement of income as of March 31, 2021 and March 31, 2020 were as follows:

			Three Months Ended March 31,
	Classification		2021		2020
		(in thousands)
Operating lease cost	General and administrative		$	24,418	$	23,004
Financing lease cost:
Amortization of right-of-use assets	General and administrative		501		477
Interest on lease liabilities	Interest expense		22		26
Total finance lease cost			523		503
Variable lease cost (1)	General and administrative		9,546		9,477
Sublease income	General and administrative		(9,807)		(9,615)
Net lease cost			$	24,680	$	23,369

(1) Variable lease expense includes operating expenses, real estate taxes and employee parking.

The sub-lease income represents all revenues received from sub-tenants. It is primarily fixed base rental payments combined with variable reimbursements such as operating expenses, real estate taxes and employee parking. We derive most of our sub-tenant income from our New York metro sub-tenant agreements. Sub-tenant income related to base rent is recorded on a straight-line basis. 

Maturities of lease liabilities were as follows:

	Operating Leases		Financing Leases		Total
Year ending December 31,	(in thousands)
2021 (excluding the three months ended March 31, 2021)	$	82,594	$	1,363	$	83,957
2022	100,370		1,551		101,921
2023	93,299		1,289		94,588
2024	90,283		722		91,005
2025	25,430		426		25,856
Thereafter	149,885		24		149,909
Total lease payments	541,861		5,375		547,236
Less interest	(51,740)		(140)
Present value of lease liabilities	$	490,121	$	5,235

We have signed a lease which commences in 2024, relating to approximately 166,000 square feet of space in New York City. Our estimated total base rent obligation (excluding taxes, operating expenses and utilities) over the 20-year lease term is approximately $393.0 million.

Lease term and discount rate:
Weighted average remaining lease term (years):
Operating leases	7.23
Finance leases	3.52
Weighted average discount rate:
Operating leases	3.07	%
Finance leases	1.75	%

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Supplemental cash flow information related to leases was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$	27,970	$	29,698
Operating cash flows used for financing leases	22		26
Financing cash flows from finance leases	424		504
Right-of-use assets obtained in exchange for lease obligations(1):
Operating leases (2)	12,161		—
Finance leases	3,283		1,695

(1) Represents non-cash activity and, accordingly, is not reflected in the consolidated statements of cash flows.

(2) Represents net non-cash activity of new lease obligations, extensions and reductions of existing lease obligations.

14. Consolidated Company-Sponsored Investment Funds

We regularly provide seed capital to new company-sponsored investment funds. As such, we may consolidate or de-consolidate a variety of company-sponsored investment funds each quarter. Due to the similarity of risks related to our involvement with each company-sponsored investment fund, disclosures required under the VIE model are aggregated, such as disclosures regarding the carrying amount and classification of assets.

We are not required to provide financial support to company-sponsored investment funds, and only the assets of such funds are available to settle each fund's own liabilities. Our exposure to loss regarding consolidated company-sponsored investment funds is limited to our investment in, and our management fee earned from, such funds. Equity and debt holders of such funds have no recourse to AB’s assets or to the general credit of AB.

The balances of consolidated VIEs and VOEs included in our condensed consolidated statements of financial condition were as follows:

	March 31, 2021						December 31, 2020
	(in thousands)
	VIEs		VOEs		Total		VIEs		VOEs		Total
Cash and cash equivalents	$	35,084	$	3,477	$	38,561	$	36,370	$	136	$	36,506
Investments	247,581		60,462		308,043		242,541		60,041		302,582
Other assets	6,869		13,605		20,474		4,859		7,385		12,244
Total assets	$	289,534	$	77,544	$	367,078	$	283,770	$	67,562	$	351,332
Liabilities	$	13,922	$	28,609	$	42,531	$	7,741	$	22,879	$	30,620
Redeemable non-controlling interest	64,313		24,254		88,567		82,753		19,606		102,359
Partners' capital attributable to AB Unitholders	211,299		24,681		235,980		193,276		25,077		218,353
Total liabilities, redeemable non-controlling interest and partners' capital	$	289,534	$	77,544	$	367,078	$	283,770	$	67,562	$	351,332

During the first quarter of 2021, we deconsolidated one fund in which we had a seed investment of approximately $4.1 million due to no longer having a controlling financial interest.

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Fair Value

Cash and cash equivalents include cash on hand, demand deposits, overnight commercial paper and highly liquid investments with original maturities of three months or less. Due to the short-term nature of these instruments, the recorded value has been determined to approximate fair value.

Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		Total
March 31, 2021:
Investments - VIEs	$	51,869	$	195,206	$	506	$	247,581
Investments - VOEs	301		59,950		211		60,462
Derivatives - VIEs	515		2,389		—		2,904
Derivatives - VOEs	—		2,395		—		2,395
Total assets measured at fair value	$	52,685	$	259,940	$	717	$	313,342
Derivatives - VIEs	7,362		4,822		—		12,184
Derivatives - VOEs	7,071		686		—		7,757
Total liabilities measured at fair value	$	14,433	$	5,508	$	—	$	19,941
December 31, 2020:
Investments - VIEs	$	73,909	$	168,114	$	518	$	242,541
Investments - VOEs	—		59,940		101		60,041
Derivatives - VIEs	442		2,782		—		3,224
Derivatives - VOEs	—		464		—		464
Total assets measured at fair value	$	74,351	$	231,300	$	619	$	306,270
Derivatives - VIEs	$	1,649	$	5,244	$	—	$	6,893
Derivatives - VOEs	—		664		—		664
Total liabilities measured at fair value	$	1,649	$	5,908	$	—	$	7,557

See Note 11 for a description of the fair value methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy.

The change in carrying value associated with Level 3 financial instruments carried at fair value within consolidated company-sponsored investment funds was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	619	$	854
Transfers (out) in	(10)		231
Purchases	119		33
Sales	(3)		(362)
Realized gains (losses), net	3		—
Unrealized gains (losses), net	(11)		(224)
Accrued discounts	—		2
Balance as of end of period	$	717	$	534

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The Level 3 securities primarily consist of corporate bonds that are vendor priced with no ratings available, bank loans, non-agency collateralized mortgage obligations and asset-backed securities.

Transfers into and out of all levels of the fair value hierarchy are reflected at end-of-period fair values. Realized and unrealized gains and losses on Level 3 financial instruments are recorded in investment gains and losses in the condensed consolidated statements of income.

Derivative Instruments

As of March 31, 2021 and December 31, 2020, the VIEs held $9.3 million and $3.7 million (net), respectively, of futures, forwards and swaps within their portfolios. For the three months ended March 31, 2021 and 2020, we recognized $1.1 million and $1.7 million of losses, respectively, on these derivatives. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income.

As of March 31, 2021 and December 31, 2020, the VIEs held $0.6 million and $0.5 million, respectively, of cash collateral payable to trade counterparties. This obligation to return cash is reported in the liabilities of consolidated company-sponsored investment funds in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, the VIEs delivered $4.9 million and $4.2 million, respectively, of cash collateral into brokerage accounts. The VIEs report this cash collateral in the consolidated company-sponsored investment funds cash and cash equivalents in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, the VOEs held $5.4 million and $0.2 million (net), respectively, of futures, forwards, options and swaps within their portfolios. For the three months ended March 31, 2021 and 2020, we recognized $0.9 million and $0.1 million of gains, respectively, on these derivatives. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income.

As of both March 31, 2021 and December 31, 2020, the VOEs held no cash collateral payable to trade counterparties. This obligation to return cash is reported in the liabilities of consolidated company-sponsored investment funds in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, the VOEs delivered zero and $0.1 million, respectively, of cash collateral in brokerage accounts. The VOEs report this cash collateral in the consolidated company-sponsored investment funds cash and cash equivalents in our condensed consolidated statements of financial condition.

Offsetting Assets and Liabilities

Offsetting of derivative assets of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	2,904	$	—	$	2,904	$	—	$	(551)	$	2,353
Derivatives - VOEs	$	2,395	$	—	$	2,395	$	—	$	—	$	2,395
December 31, 2020:
Derivatives - VIEs	$	3,224	$	—	$	3,224	$	—	$	(513)	$	2,711
Derivatives - VOEs	$	464	$	—	$	464	$	—	$	—	$	464

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Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	12,184	$	—	$	12,184	$	—	$	(4,929)	$	7,255
Derivatives - VOEs	$	7,757	$	—	$	7,757	$	—	$	—	$	7,757
December 31, 2020:
Derivatives - VIEs	$	6,893	$	—	$	6,893	$	—	$	(4,201)	$	2,692
Derivatives - VOEs	$	664	$	—	$	664	$	—	$	(138)	$	526

Cash collateral, whether pledged or received on derivative instruments, is not considered material and, accordingly, is not disclosed by counterparty.

Non-Consolidated VIEs

As of March 31, 2021, the net assets of company-sponsored investment products that are non-consolidated VIEs are approximately $70.9 billion, and our maximum risk of loss is our investment of $7.2 million in these VIEs and our advisory fee receivables from these VIEs is $76.1 million.

15.     Units Outstanding

Changes in AB Units outstanding during the three-month period ended March 31, 2021 were as follows:

Outstanding as of December 31, 2020	270,509,658
Options exercised	79,108
Units issued	2,847,552
Units retired(1)	(761,153)
Outstanding as of March 31, 2021	272,675,165

(1) During the three-months ended March 31, 2021, we purchased 1,400 AB Units in private transactions and retired them.

16.     Debt

AB has an $800.0 million committed, unsecured senior revolving credit facility (the “Credit Facility”) with a group of commercial banks and other lenders, which matures on September 27, 2023. The Credit Facility provides for possible increases in the principal amount by up to an aggregate incremental amount of $200.0 million; any such increase is subject to the consent of the affected lenders. The Credit Facility is available for AB and Sanford C. Bernstein & Co., LLC ("SCB LLC") business purposes, including the support of AB’s commercial paper program. Both AB and SCB LLC can draw directly under the Credit Facility, and management may draw on the Credit Facility from time to time. AB has agreed to guarantee the obligations of SCB LLC under the Credit Facility.

The Credit Facility contains affirmative, negative and financial covenants, which are customary for facilities of this type, including restrictions on dispositions of assets, restrictions on liens, a minimum interest coverage ratio and a maximum leverage ratio. As of March 31, 2021, we were in compliance with these covenants. The Credit Facility also includes customary events of default (with customary grace periods, as applicable), including provisions under which, upon the occurrence of an event of default, all outstanding loans may be accelerated and/or lender’s commitments may be terminated. Also, under such provisions, upon the occurrence of certain insolvency- or bankruptcy-related events of default, all amounts payable under the Credit Facility would automatically become immediately due and payable, and the lender’s commitments automatically would terminate.

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Amounts under the Credit Facility may be borrowed, repaid and re-borrowed by us from time to time until the maturity of the facility. Voluntary prepayments and commitment reductions requested by us are permitted at any time without a fee (other than customary breakage costs relating to the prepayment of any drawn loans) upon proper notice and subject to a minimum dollar requirement. Borrowings under the Credit Facility bear interest at a rate per annum, which will be, at our option, a rate equal to an applicable margin, which is subject to adjustment based on the credit ratings of AB, plus one of the following indices: London Interbank Offered Rate; a floating base rate; or the Federal Funds rate.

As of March 31, 2021 and December 31, 2020, we had no amounts outstanding under the Credit Facility. During the first three months of 2021 and the full year 2020, we did not draw upon the Credit Facility.

AB also has a $900.0 million committed, unsecured senior credit facility (“EQH Facility”) with EQH. The EQH Facility matures on November 4, 2024 and is available for AB's general business purposes. Borrowings under the EQH Facility generally bear interest at a rate per annum based on prevailing overnight commercial paper rates.

The EQH Facility contains affirmative, negative and financial covenants which are substantially similar to those in AB’s committed bank facilities. The EQH Facility also includes customary events of default substantially similar to those in AB’s committed bank facilities, including provisions under which, upon the occurrence of an event of default, all outstanding loans may be accelerated and/or the lender’s commitment may be terminated.

Amounts under the EQH Facility may be borrowed, repaid and re-borrowed by us from time to time until the maturity of the facility. AB or EQH may reduce or terminate the commitment at any time without penalty upon proper notice. EQH also may terminate the facility immediately upon a change of control of our general partner.

As of March 31, 2021 and December 31, 2020, AB had $625.0 million and $675.0 million outstanding under the EQH Facility, in each case with an interest rate of approximately 0.2%. Average daily borrowings on the EQH Facility for the first three months of 2021 and the full year 2020 were $622.3 million and $470.8 million, respectively, with weighted average interest rates of approximately 0.2% and 0.5%, respectively.

In addition to the EQH Facility, on September 1, 2020, AB established a new $300.0 million uncommitted, unsecured senior credit facility (“EQH Uncommitted Facility”) with EQH. The EQH Uncommitted Facility matures on September 1, 2024 and is available for AB's general business purposes. Borrowings under the EQH Unsecured Facility generally bear interest at a rate per annum based on prevailing overnight commercial paper rates. The EQH Uncommitted Facility contains affirmative, negative and financial covenants which are substantially similar to those in the EQH Facility. As of March 31, 2021 and December 31, 2020, we had no amounts outstanding on the EQH Uncommitted Facility. During the first three months of 2021 and the full year 2020, we did not draw upon the EQH Uncommitted Facility.

As of March 31, 2021 and December 31, 2020, we had no commercial paper outstanding. The commercial paper is short term in nature, and as such, recorded value is estimated to approximate fair value (and considered a Level 2 security in the fair value hierarchy). Average daily borrowings of commercial paper during the first three months of 2021 and full year 2020 were $120.3 million and $83.2 million, respectively, with weighted average interest rates of approximately 0.2% and 0.4%, respectively.

AB has a $200.0 million committed, unsecured senior revolving credit facility (the "Revolver") with a leading international bank, which matures on November 16, 2021. The Revolver is available for AB's and SCB LLC's business purposes, including the provision of additional liquidity to meet funding requirements primarily related to SCB LLC's operations. Both AB and SCB LLC can draw directly under the Revolver and management expects to draw on the Revolver from time to time. AB has agreed to guarantee the obligations of SCB LLC under the Revolver. The Revolver contains affirmative, negative and financial covenants that are identical to those of the Credit Facility. Borrowings under the Revolver bear interest at a rate per annum, which will be, at our option, a rate equal to an applicable margin, which is subject to adjustment based on the credit ratings of AB, plus one of the following indices: London Interbank Offered Rate; a floating base rate; or the Federal Funds rate. As of both March 31, 2021 and December 31, 2020, we had no amounts outstanding under the Revolver. Average daily borrowings under the Revolver during the first three months of 2021 and full year 2020 were $26.1 million and $16.5 million, respectively, with weighted average interest rates of approximately 1.1% and 1.6%, respectively.

In addition, SCB LLC currently has three uncommitted lines of credit with three financial institutions. Two of these lines of credit permit us to borrow up to an aggregate of approximately $165.0 million, with AB named as an additional borrower, while the other line has no stated limit. As of March 31, 2021 and December 31, 2020, SCB LLC had no outstanding

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balance on these lines of credit. We did not draw on these lines of credit during the first three months of 2021. Average daily borrowings during the full year 2020 were $0.9 million with a weighted average interest rate of approximately 1.6%.

17.    Non-controlling Interests

Non-controlling interest in net income for the three months ended March 31, 2021 and 2020 consisted of the following:

		Three Months Ended March 31,
		2021		2020
	(in thousands)
Redeemable non-controlling interests:
Consolidated company-sponsored investment funds		$	(292)	$	(25,571)
Total non-controlling interest in net income		$	(292)	$	(25,571)

Redeemable non-controlling interest as of March 31, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021		December 31, 2020
	(in thousands)
Consolidated company-sponsored investment funds	$	88,567	$	102,359
Total redeemable non-controlling interest	$	88,567	$	102,359

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

Impact of COVID-19

General Economic Conditions

During the first quarter of 2020, COVID-19 significantly impacted the global economy. The impact has been profound, has continued through the first quarter of 2021 and may persist for months to come. While many businesses have re-opened, vaccinations are underway (particularly in the U.S., the U.K. and Israel) and leading economic indicators are showing signs of improvement, the overall extent and duration of COVID-19's impact on businesses and economic activity generally remains unclear.

Governments around the world have responded to COVID-19 with economic stimulus measures, including a $2 trillion emergency relief bill passed in the U.S. during the first quarter of 2020, an additional $900 billion in aid passed during the fourth quarter of 2020, and the most recent $1.9 trillion COVID-19 relief package passed in the first quarter of 2021. Similar fiscal stimulus was passed by many governments around the world. These measures and possible additional stimulus and aid measures are intended to steady businesses and consumers until economic activity meaningfully recovers. The timing and magnitude of any such recovery, however, remains uncertain.

Various countries around the world, and certain areas in the U.S., have continued to experience surges in the rates of COVID-19 infections, which have resulted from the emergence and spread of mutated strains of the virus, greatly increased social interactions, including at colleges and universities, after re-opening of economies, and decreased usage of mitigation techniques, such as mask wearing and social distancing, in some areas. These ongoing circumstances surrounding the virus may adversely affect consumer sentiment and the pace of business re-openings, and they also may delay or slow economic recovery and cause additional market volatility.

AB Impact

At the onset of COVID-19 during the first quarter of 2020, we quickly responded in the various jurisdictions where we operate, including the U.S., the U.K., Hong Kong, Shanghai, Singapore and Taiwan. We implemented business continuity measures, including travel restrictions and a work-from-home requirement for almost all personnel (other than a relatively small number of employees whose physical presence in our offices was considered critical), which has remained in place (except in our Asia-Pacific offices, most of which have reopened) throughout 2020 and the first quarter of 2021 to ensure operating continuity for all critical functions. We also instituted a notification process, which persists today, for any employee who tests positive for COVID-19 or has been exposed to someone else who has tested positive. As the COVID-19 crisis has continued to evolve since the lockdown in the first quarter of 2020, certain key functions of the business, such as Risk Management, Business Continuity, Finance and Human Capital, have maintained constant communication and monitored the evolution of the pandemic to keep our employees safe and disseminate information regarding key developments. Additionally, we continue to monitor communications from the World Health Organization and the U.S. Centers for Disease Control and Prevention to ensure we have current information.

We have continued to enhance our technology, which has increased the effectiveness of our remote work force. We have also continued to enhance our virtual programs to support business functions, such as training on cybersecurity and enhancements to our existing technology platforms. There has been a heightened focus on the emotional well-being of our employees, and we have provided regular touch points with employees through virtual town halls and management communications. Additionally, we have maintained regular communications and updates on the virus and the Company's response, which are posted on the Company's internal website, to ensure transparent communication with our employees.

We continue to consider, and in some cases methodically implement, return to office programs for our U.S. and European offices. (As noted above, most of our Asia-Pacific offices re-opened in 2020.) In fact, we hope and expect to gradually bring our workforce back into the office, across each of our locations, early in the third quarter of 2021. However, we continue to monitor the daily evolution of the pandemic in order to ensure the health and safety of our employees remains our top priority. We will modify our return to office plans, as needed, to ensure the safety of our employees and to ensure that the highest safety and cleanliness protocols are followed. We believe that our business continuity plan and technology platform will continue to support the effectiveness of our employees working remotely.

The economic impact of COVID-19 and any additional declines in the financial markets could have a significant adverse effect on our AUM and revenues, particularly if economic activity does not continue to recover. Although countries throughout the world continue to grapple with re-opening their economies, this will continue to be a gradual process, and there is a significant risk that the opening process may be further interrupted if infection rates increase. Also, although unemployment rates have declined, they are still considered high and any reluctance of consumers to resume spending could do long-term damage to the

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global economy, which would have an adverse effect on our business. Additionally, as most of our workforce continues working remotely, we are mindful of increased risk related to cybersecurity, which could significantly disrupt our business functions.

Ultimately, the return to normal business and economic activity will likely require the broad application of effective vaccines. The distribution of multiple safe, effective vaccines was initiated towards the end of the fourth quarter of 2020 and the distribution of such vaccines has increased through the first quarter of 2021, particularly in the U.S., the U.K. and Israel. Furthermore, while issues persist around the speed, selective nature of those who are eligible to receive the vaccination, as well as logistical challenges regarding availability and distribution of the vaccines, most people in the U.S. who are at least 16 years of age and want to be vaccinated likely will be vaccinated by the end of the second quarter of 2021.

Executive Overview

Our total assets under management (“AUM”) as of March 31, 2021 were $697.2 billion, up $11.3 billion, or 1.6%, compared to December 31, 2020, and up $155.4 billion, or 28.7%, compared to March 31, 2020. During the first quarter of 2021, AUM increased as a result of market appreciation of $6.1 billion and net inflows of $5.2 billion (Retail net inflows of $2.7 billion, Private Wealth Management net inflows of $1.7 billion and Institutional net inflows of $0.8 billion). During the twelve months ended March 31, 2021, AUM increased as a result of market appreciation of $147.2 billion and net inflows of $8.2 billion (Retail net inflows of $6.5 billion, Institutional net inflows of $1.4 billion and Private Wealth Management net inflows of $0.3 billion). Excluding AXA's redemption of low-fee fixed income mandates of $10.8 billion (see discussion below), the firm generated net inflows of $19.0 billion during the twelve months ended March 31, 2021. There were no outflows resulting from AXA's ongoing redemption during the three months ended March 31, 2021.

Institutional AUM decreased $0.9 billion, or 0.3%, to $314.7 billion during the first quarter of 2021, primarily due to market depreciation of $1.5 billion, driven by fixed income markets which declined in the quarter, partially offset by net inflows of $0.8 billion. Gross sales decreased sequentially from $9.9 billion during the fourth quarter of 2020 to $4.9 billion during the first quarter of 2021. Redemptions and terminations increased sequentially from $2.0 billion to $2.8 billion.

Retail AUM increased $7.0 billion, or 2.6%, to $272.3 billion during the first quarter of 2021, primarily due to market appreciation of $4.1 billion and net inflows of $2.7 billion. Gross sales increased sequentially from $17.7 billion during the fourth quarter of 2020 to $23.0 billion during the first quarter of 2021. Redemptions and terminations increased sequentially from $15.2 billion to $17.7 billion.

Private Wealth Management AUM increased $5.2 billion, or 5.0%, to $110.2 billion during the first quarter of 2021, due to market appreciation of $3.5 billion and net inflows of $1.7 billion. Gross sales increased sequentially from $3.7 billion during the fourth quarter of 2020 to $5.4 billion during the first quarter of 2021. Redemptions and terminations decreased sequentially from $4.8 billion to $3.7 billion.

Bernstein Research Services revenue for the first quarter of 2021 was $119.0 million, down $10.2 million, or 7.9%, compared to the first quarter of 2020 due to reduced customer trading activity driven by fewer trading days and decreased market volatility, as compared to the COVID-related significant surge in trading volume experienced during the three months ended March 31, 2020.

Net revenues for the first quarter of 2021 increased $133.1 million, or 15.2%, to $1.0 billion from $874.2 million in the first quarter of 2020. The increase was primarily due to higher investment advisory base fees of $74.1 million, higher investment gains of $46.2 million, higher distribution revenues of $16.7 million and higher performance-based fees of $7.6 million, partially offset by lower Bernstein Research Services revenue of $10.2 million. Operating expenses for the first quarter of 2021 increased $50.7 million, or 7.3%, to $746.7 million from $695.9 million in the first quarter of 2020. The increase was primarily due to higher employee compensation and benefits expenses of $43.8 million and higher promotion and servicing expense of $15.6 million, partially offset by lower amortization of intangible assets of $5.0 million, lower general and administrative expenses of $2.0 million and lower interest on borrowings of $1.5 million. Our operating income increased $82.4 million, or 46.2%, to $260.6 million from $178.2 million and our operating margin increased to 25.9% in the first quarter of 2021 from 23.3% in the first quarter of 2020.

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Market Environment

U.S. equity markets remained strong during the first quarter of 2021, with the S&P 500, Dow Jones Industrial Average and Nasdaq each finishing the quarter in positive territory. The U.S. seeks to continue to emerge from the pandemic by accelerating progress on vaccinations combined with unprecedented levels of fiscal stimulus. The Federal Reserve has pledged to maintain its current accommodative monetary policy until inflation has exceeded their target for a sustained time period. In the U.K., the rapid roll-out of the vaccine is expected to facilitate relatively strong growth from the second quarter onwards, with Brexit-related trade frictions expected to ease starting in the second half of this year. Government stimulus should assist in keeping unemployment relatively low, while the Bank of England is likely to keep rates on hold during the recovery phase. In China, the market outlook remains positive, as a broader global re-opening appears to be benefiting the Chinese economy. Given the strong recovery from the pandemic, China will likely begin a slow and gradual tightening of their fiscal policy. While political tensions between China and the U.S. continue to linger, further escalation from the new U.S. administration in the near term seems unlikely.

MiFID II

In Europe, MiFID II, which has been effective since 2018, has significantly modified how European broker-dealers can be compensated for research. These modifications have significantly reduced the overall research spend by many European buy-side firms, which has decreased the revenues we earn from these clients. If this trend continues, the revenues we earn from our European clients would deplete further.

Also, while MiFID II does not apply outside of Europe, competitive and client pressures may force buy-side firms operating outside of Europe to pay for research from their own resources instead of through bundled trading commissions. If this occurs, research budgets from those clients, as well as our sell-side revenues, may decrease further. Additionally, these pressures could force our buy-side operation to pay for research out of our own revenues instead of through bundled trading commissions, which could increase our firm’s expenses and decrease our operating income.

Lastly, although the impact of MiFID II is largely known, the ultimate, global impact is still uncertain.

Relationship with Equitable Holdings and AXA

Prior to an initial public offering ("IPO") by Equitable Holdings, Inc. (“EQH”) in May of 2018, EQH was a wholly-owned subsidiary of AXA S.A. ("AXA"). Since the IPO, AXA has divested its ownership in EQH to less than 10% of the outstanding common stock of EQH as of March 31, 2021.

While we cannot at this time predict the full impact on AB of these transactions, such impact has included a reduction in the support AXA provided to AB in the past with respect to AB's investment management business, resulting in a modest decrease in our revenues and ability to initiate new investment services.

Our ending AUM at March 31, 2021 reflects $11.8 billion in outflows resulting from AXA's redemption of certain low-fee fixed income mandates during 2020. No redemptions were made during the three months ended March 31, 2021. We currently anticipate AXA to redeem the majority of approximately $2 billion of additional assets during the three months ending June 30, 2021, bringing the total assets redeemed to approximately $14 billion. The revenue we earn from the management of these assets is not significant.

Relocation Strategy

We previously announced that we would establish our corporate headquarters in, and relocate approximately 1,250 jobs located in the New York metro area to, Nashville, TN. Our Nashville headquarters will house Finance, IT, Operations, Legal, Compliance, Internal Audit, Human Capital, and Sales and Marketing. We have been actively relocating jobs and expect this transition to take several years. We will continue to maintain a principal location in New York City, which will house our Portfolio Management, Sell-Side Research and Trading, and New York-based Private Wealth Management businesses.

We believe relocating our corporate headquarters to Nashville affords us the opportunity to provide an improved quality of life alternative for our employees and enable us to attract and recruit new talented employees to a highly desirable location while improving the long-term cost structure of the firm.

During the transition period, which began in 2018 and is expected to continue through 2024, we currently estimate that we will incur transition costs of approximately $145 million to $155 million. These costs include employee relocation, severance, recruitment, and overlapping compensation and occupancy costs. Over this same period, we expect to realize total expense savings of approximately $205 million to $215 million, an amount greater than the total transition costs. However, we did incur

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some transition costs before we began to realize expense savings. For the period beginning in 2018 and ending in the fourth quarter of 2020, we incurred $70 million of cumulative transition costs compared to $46 million of cumulative savings. In addition, we incurred $7 million of transition costs for the three months ended March 31, 2021 compared to $10 million of expense savings, resulting in an overall net savings of $3 million for the period. We currently anticipate an EPU increase in 2021 of approximately $0.02 resulting from our relocation strategy, which compares to the $0.01 EPU increase that occurred in 2020. We also expect to achieve EPU accretion in each year thereafter. Beginning in 2025, once the transition period has been completed, we estimate ongoing annual expense savings towards the upper end of the range of $75 million to $80 million, which will result from a combination of occupancy and compensation-related savings. Our estimates for both the transition costs and the corresponding expense savings are based on our current assumptions of employee relocation costs, severance, and overlapping compensation and occupancy costs. In addition, our estimates for both the timing of when we incur transition costs and realize the related expense savings are based on our current relocation implementation plan and the timing for execution of each phase. The actual total charges we eventually record, the related expense savings we realize, and timing of EPU impact may differ from our current estimates as we implement each phase of our headquarters relocation.

During October 2018, we signed a lease, which commenced in the fourth quarter of 2020, relating to 218,976 square feet of space at our new Nashville headquarters. Our estimated total base rent obligation (excluding taxes, operating expenses and utilities) over the 15-year initial lease term is $134 million.

Although we have presented our transition costs and annual expense savings with numerical specificity, and we believe these targets to be reasonable as of the date of this report, the uncertainties surrounding the assumptions we discuss above create a significant risk that these targets may not be achieved.  Accordingly, the expenses we actually incur and the savings we actually realize may differ from our targets, particularly if actual events adversely differ from one or more of our key assumptions.  The transition costs and expense savings, together with their underlying assumptions, are Forward-Looking Statements and can be affected by any of the factors discussed in “Risk Factors” and “Cautions Regarding Forward-Looking Statements” in this 10-Q and our 2020 10-K. We strongly caution investors not to place undue reliance on any of these assumptions or our cost and expense targets.  Except as may be required by applicable securities laws, we are not under any obligation, and we expressly disclaim any obligation, to update or alter any assumptions, estimates, financial goals, targets, projections or other related statements that we may make.

Assets Under Management

Assets under management by distribution channel are as follows:

	As of March 31,
	2021		2020		$ Change		% Change
	(in billions)
Institutions	$	314.7	$	256.7	$	58.0	22.6	%
Retail	272.3		198.6		73.7		37.1
Private Wealth Management	110.2		86.5		23.7		27.3
Total	$	697.2	$	541.8	$	155.4	28.7	%

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Assets under management by investment service are as follows:

	As of March 31,
	2021		2020		$ Change		% Change
	(in billions)
Equity
Actively Managed	$	231.8	$	141.5	$	90.3	63.9	%
Passively Managed(1)	66.3		47.2		19.1		40.4
Total Equity	298.1		188.7		109.4		58.0
Fixed Income
Actively Managed
Taxable	252.2		236.1		16.1		6.8
Tax–exempt	51.8		45.9		5.9		12.8
	304.0		282.0		22.0		7.8
Passively Managed(1)	8.3		10.3		(2.0)		(19.5)
Total Fixed Income	312.3		292.3		20.0		6.8
Alternatives/Multi-Asset Solutions(2)
Actively Managed	83.6		59.4		24.2		40.7
Passively Managed(1)	3.2		1.4		1.8		n/m
Total Alternatives/Multi-Asset Solutions	86.8		60.8		26.0		42.7
Total	$	697.2	$	541.8	$	155.4	28.7	%

(1)Includes index and enhanced index services.

(2)Includes certain multi-asset solutions and services not included in equity or fixed income services. Prior to December 31, 2020, this investment service line was disclosed as “Other.” In order to reflect the increasing significance of our Alternatives and Multi-Asset Solutions services, we updated the investment service line to “Alternatives and Multi-Asset Solutions."

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Changes in assets under management for the three-month and twelve-month periods ended March 31, 2021 are as follows:

	Distribution Channel
	Institutions		Retail		Private Wealth Management		Total
	(in billions)
Balance as of December 31, 2020	$	315.6	$	265.3	$	105.0	$	685.9
Long-term flows:
Sales/new accounts	4.9		23.0		5.4		33.3
Redemptions/terminations	(2.8)		(17.7)		(3.7)		(24.2)
Cash flow/unreinvested dividends	(1.3)		(2.6)		—		(3.9)
Net long-term inflows	0.8		2.7		1.7		5.2
Transfers	(0.2)		0.2		—		—
Market (depreciation) appreciation	(1.5)		4.1		3.5		6.1
Net change	(0.9)		7.0		5.2		11.3
Balance as of March 31, 2021	$	314.7	$	272.3	$	110.2	$	697.2
Balance as of March 31, 2020	$	256.7	$	198.6	$	86.5	$	541.8
Long-term flows:
Sales/new accounts	31.8		77.8		16.1		125.7
Redemptions/terminations	(23.1)		(61.7)		(15.9)		(100.7)
Cash flow/unreinvested dividends	(7.3)		(9.6)		0.1		(16.8)
Net long-term inflows(1)	1.4		6.5		0.3		8.2
Transfers	1.1		(0.3)		(0.8)		—
Market appreciation	55.5		67.5		24.2		147.2
Net change	58.0		73.7		23.7		155.4
Balance as of March 31, 2021	$	314.7	$	272.3	$	110.2	$	697.2

(1)Institutional net flows include $10.8 billion of AXA's redemptions of certain low-fee fixed income mandates for the twelve-month periods ended March 31, 2021.

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	Investment Service
	Equity Actively Managed		Equity Passively Managed(1)		Fixed Income Actively Managed - Taxable		Fixed Income Actively Managed - Tax- Exempt		Fixed Income Passively Managed(1)		Alternatives/ Multi-Asset Solutions(2)		Total
	(in billions)
Balance as of December 31, 2020	$	217.8	$	64.5	$	263.2	$	50.3	$	8.5	$	81.6	$	685.9
Long-term flows:
Sales/new accounts	15.6		0.2		12.4		3.4		—		1.7		33.3
Redemptions/terminations	(9.3)		(0.6)		(12.2)		(2.0)		(0.1)		—		(24.2)
Cash flow/unreinvested dividends	(2.6)		(1.6)		(1.0)		0.2		0.3		0.8		(3.9)
Net long-term inflows (outflows)	3.7		(2.0)		(0.8)		1.6		0.2		2.5		5.2
Market appreciation (depreciation)	10.3		3.8		(10.2)		(0.1)		(0.4)		2.7		6.1
Net change	14.0		1.8		(11.0)		1.5		(0.2)		5.2		11.3
Balance as of March 31, 2021	$	231.8	$	66.3	$	252.2	$	51.8	$	8.3	$	86.8	$	697.2
Balance as of March 31, 2020	$	141.5	$	47.2	$	236.1	$	45.9	$	10.3	$	60.8	$	541.8
Long-term flows:
Sales/new accounts	54.9		1.4		52.0		10.8		—		6.6		125.7
Redemptions/terminations	(36.9)		(2.4)		(50.7)		(8.6)		(0.3)		(1.8)		(100.7)
Cash flow/unreinvested dividends	(8.3)		(4.4)		(5.4)		0.4		(1.8)		2.7		(16.8)
Net long-term inflows (outflows)(3)	9.7		(5.4)		(4.1)		2.6		(2.1)		7.5		8.2
Market appreciation	80.6		24.5		20.2		3.3		0.1		18.5		147.2
Net change	90.3		19.1		16.1		5.9		(2.0)		26.0		155.4
Balance as of March 31, 2021	$	231.8	$	66.3	$	252.2	$	51.8	$	8.3	$	86.8	$	697.2

(1)Includes index and enhanced index services.

(2)Includes certain multi-asset solutions and services not included in equity or fixed income services. Prior to December 31, 2020, this investment service line was disclosed as “Other.” In order to reflect the increasing significance of our Alternatives and Multi-Asset Solutions services, we updated the investment service line to “Alternatives and Multi-Asset Solutions."

(3)    Fixed income – taxable investment service net flows include $10.8 billion of AXA's redemptions of certain low-fee fixed income mandates for the twelve-month periods ended March 31, 2021.

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Net long-term inflows (outflows) for actively managed investment services as compared to passively managed investment services for the three-month and twelve-month periods ended March 31, 2021 are as follows:

	Periods Ended March 31, 2021
	Three-months		Twelve-months
	(in billions)
Actively Managed
Equity	$	3.7	$	9.7
Fixed Income	0.8		(1.5)
Alternatives/Multi-Asset Solutions	2.0		6.6
	6.5		14.8
Passively Managed
Equity	(2.0)		(5.4)
Fixed Income	0.2		(2.1)
Alternatives/Multi-Asset Solutions	0.5		0.9
	(1.3)		(6.6)
Total net long-term inflows	$	5.2	$	8.2

Average assets under management by distribution channel and investment service are as follows:

	Three Months Ended March 31,
	2021		2020		$ Change		% Change
	(in billions)
Distribution Channel:
Institutions	$	313.4	$	276.6	$	36.8	13.3	%
Retail	268.0		229.0		39.0		17.1
Private Wealth Management	107.1		96.4		10.7		11.1
Total	$	688.5	$	602.0	$	86.5	14.4	%
Investment Service:
Equity Actively Managed	$	223.4	$	164.8	$	58.6	35.5	%
Equity Passively Managed(1)	64.6		55.4		9.2		16.6
Fixed Income Actively Managed – Taxable	257.3		256.7		0.6		0.2
Fixed Income Actively Managed – Tax-exempt	51.2		47.7		3.5		7.3
Fixed Income Passively Managed(1)	8.4		9.7		(1.3)		(13.5)
Alternatives/Multi-Asset Solutions(2)	83.6		67.7		15.9		23.5
Total	$	688.5	$	602.0	$	86.5	14.4	%

(1)Includes index and enhanced index services.

(2)Includes certain multi-asset solutions and services not included in equity of fixed income services. Prior to December 31, 2020, this investment service line was disclosed as “Other.” In order to reflect the increasing significance of our Alternatives and Multi-Asset Solutions services, we updated the investment service line to “Alternatives and Multi-Asset Solutions."

Our Institutional channel first quarter average AUM of $313.4 billion increased $36.8 billion, or 13.3%, compared to the first quarter of 2020, primarily due to this AUM increasing $58.0 billion, or 22.6%, to $314.7 billion over the last twelve months. The $58.0 billion increase primarily resulted from market appreciation of $55.5 billion and net inflows of $1.4 billion.

Our Retail channel first quarter average AUM of $268.0 billion increased $39.0 billion, or 17.1%, compared to the first quarter of 2020, primarily due to this AUM increasing $73.7 billion, or 37.1%, to $272.3 billion over the last twelve months. The $73.7 billion increase primarily resulted from market appreciation of $67.5 billion and net inflows of $6.5 billion.

Our Private Wealth Management channel first quarter average AUM of $107.1 billion increased $10.7 billion, or 11.1%, compared to the first quarter of 2020, primarily due to this AUM increasing $23.7 billion, or 27.3%, to $110.2 billion over the

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last twelve months. The $23.7 billion increase primarily resulted from market appreciation of $24.2 billion and net inflows of $0.3 billion.

Furthermore, regarding each of our three client channels described above, our AUM declined precipitously during March 2020 resulting from the adverse market reaction to the onset of the COVID-19 pandemic.

Absolute investment composite returns, gross of fees, and relative performance as of March 31, 2021 compared to benchmarks for certain representative Institutional equity and fixed income services are as follows:

	1-Year		3-Year(1)		5-Year(1)
Global High Income - Hedged (fixed income)
Absolute return	27.4	%	4.6	%	7.0	%
Relative return (vs. Bloomberg Barclays Global High Yield Index - Hedged)	3.9		(0.8)		(0.1)
Global Plus - Hedged (fixed income)
Absolute return	6.2		4.5		3.9
Relative return (vs. Bloomberg Barclays Global Aggregate Index - Hedged)	4.7		0.1		0.6
Intermediate Municipal Bonds (fixed income)
Absolute return	6.5		4.2		2.9
Relative return (vs. Lipper Short/Int. Blended Muni Fund Avg)	2.2		1.0		0.7
U.S. Strategic Core Plus (fixed income)
Absolute return	4.9		5.1		4.0
Relative return (vs. Bloomberg Barclays U.S. Aggregate Index)	4.2		0.5		0.9
Emerging Market Debt (fixed income)
Absolute return	21.8		3.8		5.8
Relative return (vs. JPM EMBI Global/JPM EMBI)	7.5		(0.1)		1.0
Sustainable Global Thematic (equity)
Absolute return	72.4		20.2		19.6
Relative return (vs. MSCI ACWI Index)	17.8		8.1		6.4
International Strategic Core Equity (equity)
Absolute return	32.3		4.8		8.0
Relative return (vs. MSCI EAFE Index)	(12.2)		(1.2)		(0.8)
U.S. Small & Mid Cap Value (equity)
Absolute return	98.6		10.5		12.6
Relative return (vs. Russell 2500 Value Index)	11.1		(0.4)		0.5
U.S. Strategic Value (equity)
Absolute return	63.1		8.4		9.4
Relative return (vs. Russell 1000 Value Index)	7.0		(2.5)		(2.3)
U.S. Small Cap Growth (equity)
Absolute return	98.1		27.9		28.5
Relative return (vs. Russell 2000 Growth Index)	7.9		10.8		9.9
U.S. Large Cap Growth (equity)
Absolute return	54.1		23.0		21.5
Relative return (vs. Russell 1000 Growth Index)	(8.7)		0.2		0.5

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	1-Year	3-Year(1)	5-Year(1)
U.S. Small & Mid Cap Growth (equity)
Absolute return	86.3	23.3	24.1
Relative return (vs. Russell 2500 Growth Index)	(1.2)	3.4	4.2
Concentrated U.S. Growth (equity)
Absolute return	61.2	22.2	20.5
Relative return (vs. S&P 500 Index)	4.8	5.4	4.2
Select U.S. Equity (equity)
Absolute return	56.9	16.5	16.7
Relative return (vs. S&P 500 Index)	0.6	(0.3)	0.4
Strategic Equities (equity)
Absolute return	57.3	15.5	14.2
Relative return (vs. Russell 3000 Index)	(5.2)	(1.6)	(2.4)
Global Core Equity (equity)
Absolute return	49.9	13.0	14.7
Relative return (vs. MSCI ACWI Index)	(4.7)	0.9	1.5
U.S. Strategic Core Equity (equity)
Absolute return	39.9	14.1	12.4
Relative return (vs. S&P 500 Index)	(16.4)	(2.7)	(3.9)
Select U.S. Equity Long/Short (alternatives)
Absolute return	31.5	11.8	11.2
Relative return (vs. S&P 500 Index)	(24.8)	(4.9)	(5.1)

(1)Reflects annualized returns.

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Consolidated Results of Operations

	Three Months Ended March 31,
	2021			2020			$ Change		% Change
	(in thousands, except per unit amounts)
Net revenues	$	1,007,266		$	874,156		$	133,110	15.2	%
Expenses	746,682			695,933			50,749		7.3
Operating income	260,584			178,223			82,361		46.2
Income taxes	16,745			9,474			7,271		76.7
Net income	243,839			168,749			75,090		44.5
Net (loss) of consolidated entities attributable to non-controlling interests	(292)			(25,571)			25,279		(98.9)
Net income attributable to AB Unitholders	$	244,131		$	194,320		$	49,811	25.6
Diluted net income per AB Unit	$	0.89		$	0.71		$	0.18	25.4
Distributions per AB Unit	$	0.88		$	0.71		$	0.17	23.9
Operating margin (1)	25.9		%	23.3		%

(1)Operating income excluding net income (loss) attributable to non-controlling interests as a percentage of net revenues.

Net income attributable to AB Unitholders for the three months ended March 31, 2021 increased $49.8 million, or 25.6%, from the three months ended March 31, 2020. The increase primarily is due to (in millions):

Higher base advisory fees	$	74.1
Higher investment gains	46.2
Higher distribution revenues	16.7
Higher performance-based fees	7.6
Lower amortization of intangible assets	5.0
Lower general and administrative expenses	2.0
Higher employee compensation and benefits expense	(43.8)
Higher net income of consolidated entities attributable to non-controlling interest	(25.3)
Higher promotion and servicing expense	(15.6)
Lower Bernstein Research Services revenue	(10.2)
Higher income tax expense	(7.3)
Other	0.4
	$	49.8

Units Outstanding

Each quarter, we consider whether to implement a plan to repurchase AB Holding Units pursuant to Rules 10b5-1 and 10b-18 under the Exchange Act. A plan of this type allows a company to repurchase its shares at times when it otherwise might be prevented from doing so because of self-imposed trading blackout periods or because it possesses material non-public information. Each broker we select has the authority under the terms and limitations specified in the plan to repurchase AB Holding Units on our behalf. Repurchases are subject to regulations promulgated by the SEC, as well as certain price, market volume and timing constraints specified in the plan. The plan adopted during the first quarter of 2021 expired at the close of business on April 28, 2021. We may adopt additional plans in the future to engage in open-market purchases of AB Holding Units to help fund anticipated obligations under our incentive compensation award program and for other corporate purposes.

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Cash Distributions

We are required to distribute all of our Available Cash Flow, as defined in the AB Partnership Agreement, to our Unitholders and the General Partner. Available Cash Flow typically is the adjusted diluted net income per unit for the quarter multiplied by the number of general and limited partnership interests at the end of the quarter. In future periods, management anticipates that Available Cash Flow will continue to be based on adjusted diluted net income per unit, unless management determines, with concurrence of the Board of Directors, that one or more adjustments that are made for adjusted net income should not be made with respect to the Available Cash Flow calculation. See Note 6 to our consolidated financial statements contained in Item 1 for a description of Available Cash Flow.

Management Operating Metrics

We are providing the non-GAAP measures “adjusted net revenues,” “adjusted operating income” and “adjusted operating margin” because they are the principal operating metrics management uses in evaluating and comparing period-to-period operating performance. Management principally uses these metrics in evaluating performance because they present a clearer picture of our operating performance and allow management to see long-term trends without the distortion primarily caused by long-term incentive compensation-related mark-to-market adjustments, real estate charges and other adjustment items. Similarly, we believe that these management operating metrics help investors better understand the underlying trends in our results and, accordingly, provide a valuable perspective for investors.

These non-GAAP measures are provided in addition to, and not as substitutes for, net revenues, operating income and operating

margin, and they may not be comparable to non-GAAP measures presented by other companies. Management uses both accounting principles generally accepted in the United States of America ("US GAAP") and non-GAAP measures in evaluating our financial performance. The non-GAAP measures alone may pose limitations because they do not include all of our revenues and expenses.

	Three Months Ended March 31,
	2021		2020
	(in thousands, except per unit amounts)
Net revenues, US GAAP basis	$	1,007,266	$	874,156
Adjustments:
Distribution-related adjustments:
Distribution revenues	(147,600)		(130,857)
Investment advisory services fees	(22,553)		(14,814)
Pass-through adjustments:
Investment advisory services fees	(4,196)		(7,062)
Other revenues	(10,531)		(9,607)
Impact of consolidated company-sponsored funds	(311)		24,135
Long-term incentive compensation-related investment gains and dividend and interest	(2,097)		6,993
Write-down of investment	—		859
Adjusted net revenues	$	819,978	$	743,803

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	Three Months Ended March 31,
	2021			2020
	(in thousands, except per unit amounts)
Operating income, US GAAP basis	$	260,584		$	178,223
Adjustments:
Real estate	(985)			(339)
Long-term incentive compensation-related items	6			566
CEO's EQH award compensation	142			184
Write-down of investment	—			859
Acquisition-related expenses	22			526
Sub-total of non-GAAP adjustments	(815)			1,796
Less: Net (loss) of consolidated entities attributable to non-controlling interests	(292)			(25,571)
Adjusted operating income	260,061			205,590
Adjusted income taxes	16,722			10,362
Adjusted net income	$	243,339		$	195,228
Diluted net income per AB Unit, GAAP basis	$	0.89		$	0.71
Impact of non-GAAP adjustments	(0.01)			—
Adjusted diluted net income per AB Unit	$	0.88		$	0.71
Operating margin, GAAP basis	25.9		%	23.3		%
Impact of non-GAAP adjustments	5.8			4.3
Adjusted operating margin	31.7		%	27.6		%

Adjusted operating income for the three months ended March 31, 2021 increased $54.5 million, or 26.5%, from the three months ended March 31, 2020, primarily due to higher investment advisory base fees of $66.5 million, higher performance-based fees of $10.3 million, lower promotion and servicing expenses of $9.9 million, higher net investment gains of $9.1 million and lower amortization of intangible assets of $5.0 million, partially offset by higher employee compensation and benefits expense (excluding the impact of long-term incentive compensation-related items) of $35.5 million, lower Bernstein Research Services revenues of $10.2 million and higher general and administrative expenses of $2.6 million.

Adjusted Net Revenues

Net Revenue, as adjusted, is reduced to exclude all of the company's distribution revenues, which are recorded as a separate line

item on the consolidated statement of income, as well as a portion of investment advisory services fees received that is used to pay distribution and servicing costs. For certain products, based on the distinct arrangements, certain distribution fees are collected by us and passed through to third-party client intermediaries, while for certain other products, we collect investment advisory services fees and a portion is passed through to third-party client intermediaries. In both arrangements, the third-party client intermediary owns the relationship with the client and is responsible for performing services and distributing the product to the client on our behalf. We believe offsetting distribution revenues and certain investment advisory services fees is useful for our investors and other users of our financial statements because such presentation appropriately reflects the nature of these costs as pass-through payments to third parties that perform functions on behalf of our sponsored mutual funds and/or shareholders of these funds. Distribution-related adjustments fluctuate each period based on the type of investment products sold, as well as the average AUM over the period. Also, we adjust distribution revenues for the amortization of deferred sales commissions as these costs, over time, will offset such revenues.

We adjust investment advisory and services fees and other revenues for pass through costs, primarily related to our transfer agent and shareholder servicing fees. These fees do not affect operating income, but they do affect our operating margin. As such, we exclude these fees from adjusted net revenues.

We adjust for the revenue impact of consolidating company-sponsored investment funds by eliminating the consolidated company-sponsored investment funds' revenues and including AB's fees from such consolidated company-sponsored investment funds and AB's investment gains and losses on its investments in such consolidated company-sponsored investment funds that were eliminated in consolidation.

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Also, adjusted net revenues exclude investment gains and losses and dividends and interest on employee long-term incentive compensation-related investments.

Lastly, during the first quarter of 2020, we wrote-off an investment that had been received in exchange for the sale of software technology, bringing the balance to zero. Previously, we had been excluding the value of this investment from adjusted net revenues.

Adjusted Operating Income

Adjusted operating income represents operating income on a US GAAP basis excluding (1) real estate charges (credits), (2) the impact on net revenues and compensation expense of the investment gains and losses (as well as the dividends and interest) associated with employee long-term incentive compensation-related investments, (3) our CEO's EQH award compensation, as discussed below, (4) the write-down of an investment (discussed immediately above), (5) acquisition-related expenses, and (6) the impact of consolidated company-sponsored investment funds.

Real estate charges (credits) incurred have been excluded because they are not considered part of our core operating results when comparing financial results from period to period and to industry peers. Real estate charges (credits) incurred during the fourth quarter of 2019 through the fourth quarter of 2020, while excluded in the period in which the charges (credits) were recorded, are included ratably over the remaining applicable lease term.

Prior to 2009, a significant portion of employee compensation was in the form of long-term incentive compensation awards that were notionally invested in AB investment services and generally vested over a period of four years. AB economically hedged the exposure to market movements by purchasing and holding these investments on its balance sheet. All such investments had vested as of year-end 2012 and the investments have been delivered to the participants, except for those investments with respect to which the participant elected a long-term deferral. Fluctuation in the value of these investments, which also impacts compensation expense, is recorded within investment gains and losses on the income statement. Management believes it is useful to reflect the offset achieved from economically hedging the market exposure of these investments in the calculation of adjusted operating income and adjusted operating margin. The non-GAAP measures exclude gains and losses and dividends and interest on employee long-term incentive compensation-related investments included in revenues and compensation expense.

The board of directors of EQH granted to Seth P. Bernstein (“CEO”), our President and Chief Executive Officer, equity awards in connection with EQH's IPO and Mr. Bernstein's membership on the EQH Management Committee. Mr. Bernstein may receive additional equity or cash compensation from EQH in the future related to his service on the Management Committee. Any awards granted to Mr. Bernstein by EQH are recorded as compensation expense in AB’s consolidated statement of income. The compensation expense associated with these awards has been excluded from our non-GAAP measures because they are non-cash and are based upon EQH's, and not AB's, financial performance.

The write-off of the investment discussed above in Adjusted net revenues has been excluded due to its non-recurring nature and because it is not part of our core operating results.

Acquisition-related expenses have been excluded because they are not considered part of our core operating results when comparing financial results from period to period and to industry peers.

We adjusted for the operating income impact of consolidating certain company-sponsored investment funds by eliminating the consolidated company-sponsored funds' revenues and expenses and including AB's revenues and expenses that were eliminated in consolidation. We also excluded the limited partner interests we do not own.

Adjusted Net Income and Adjusted Diluted Net Income per AB Unit

As previously discussed, our quarterly distribution is typically our adjusted diluted net income per unit (which is derived from adjusted net income) for the quarter multiplied by the number of general and limited partnership interests at the end of the quarter. Adjusted income taxes, used in calculating adjusted net income, are calculated using the GAAP effective tax rate adjusted for non-GAAP income tax adjustments.

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Adjusted Operating Margin

Adjusted operating margin allows us to monitor our financial performance and efficiency from period to period without the volatility noted above in our discussion of adjusted operating income and to compare our performance to industry peers on a basis that better reflects our performance in our core business. Adjusted operating margin is derived by dividing adjusted operating income by adjusted net revenues.

Net Revenues

The components of net revenues are as follows:

	Three Months Ended March 31,
	2021		2020		$ Change		% Change
	(in thousands)
Investment advisory and services fees:
Institutions:
Base fees	$	129,430	$	110,363	$	19,067	17.3	%
Performance-based fees	4,430		2,290		2,140		93.4
	133,860		112,653		21,207		18.8
Retail:
Base fees	330,397		296,371		34,026		11.5
Performance-based fees	2,965		749		2,216		n/m
	333,362		297,120		36,242		12.2
Private Wealth Management:
Base fees	227,864		206,853		21,011		10.2
Performance-based fees	8,380		5,099		3,281		64.3
	236,244		211,952		24,292		11.5
Total:
Base fees	687,691		613,587		74,104		12.1
Performance-based fees	15,775		8,138		7,637		93.8
	703,466		621,725		81,741		13.1
Bernstein Research Services	119,021		129,223		(10,202)		(7.9)
Distribution revenues	147,600		130,857		16,743		12.8
Dividend and interest income	8,684		20,465		(11,781)		(57.6)
Investment gains (losses)	1,928		(44,306)		46,234		n/m
Other revenues	27,711		25,511		2,200		8.6
Total revenues	1,008,410		883,475		124,935		14.1
Less: Interest expense	1,144		9,319		(8,175)		(87.7)
Net revenues	$	1,007,266	$	874,156	$	133,110	15.2

Investment Advisory and Services Fees

Investment advisory and services fees are the largest component of our revenues. These fees generally are calculated as a percentage of the value of AUM as of a specified date, or as a percentage of the value of average AUM for the applicable billing period, and vary with the type of investment service, the size of account and the total amount of assets we manage for a particular client. Accordingly, fee income generally increases or decreases as AUM increase or decrease and is affected by market appreciation or depreciation, the addition of new client accounts or client contributions of additional assets to existing accounts, withdrawals of assets from and termination of client accounts, purchases and redemptions of mutual fund shares, shifts of assets between accounts or products with different fee structures, and acquisitions. Our average basis points realized (investment advisory and services fees divided by average AUM) generally approximate 30 to 110 basis points for actively-managed equity services, 10 to 70 basis points for actively-managed fixed income services and 2 to 20 basis points for

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passively-managed services. Average basis points realized for other services could range from 4 basis points for certain Institutional third party managed services to over 100 basis points for certain Retail and Private Wealth Management alternative services. These ranges include all-inclusive fee arrangements (covering investment management, trade execution and other services) for our Private Wealth Management clients.

We calculate AUM using established market-based valuation methods and fair valuation (non-observable market) methods. Market-based valuation methods include: last sale/settle prices from an exchange for actively-traded listed equities, options and futures; evaluated bid prices from recognized pricing vendors for fixed income, asset-backed or mortgage-backed issues; mid prices from recognized pricing vendors and brokers for credit default swaps; and quoted bids or spreads from pricing vendors and brokers for other derivative products. Fair valuation methods include: discounted cash flow models or any other methodology that is validated and approved by our Valuation Committee (see paragraph immediately below for more information regarding our Valuation Committee). Fair valuation methods are used only where AUM cannot be valued using market-based valuation methods, such as in the case of private equity or illiquid securities.

The Valuation Committee, which consists of senior officers and employees, is responsible for overseeing the pricing and valuation of all investments held in client and AB portfolios. The Valuation Committee has adopted a Statement of Pricing Policies describing principles and policies that apply to pricing and valuing investments held in these portfolios. We also have a Pricing Group, which reports to the Valuation Committee and is responsible for overseeing the pricing process for all investments.

We sometimes charge our clients performance-based fees. In these situations, we charge a base advisory fee and are eligible to earn an additional performance-based fee or incentive allocation that is calculated as either a percentage of absolute investment results or a percentage of investment results in excess of a stated benchmark over a specified period of time. Some performance-based fees include a high-watermark provision, which generally provides that if a client account underperforms relative to its performance target (whether absolute or relative to a specified benchmark), it must gain back such underperformance before we can collect future performance-based fees. Therefore, if we fail to achieve our performance target for a particular period, we will not earn a performance-based fee for that period and, for accounts with a high-watermark provision, our ability to earn future performance-based fees will be impaired. We are eligible to earn performance-based fees on 5.6%, 8.8% and 0.8% of the assets we manage for institutional clients, private wealth clients and retail clients, respectively (in total, 4.2% of our AUM).

For the three months ended March 31, 2021, our investment advisory and services fees increased by $81.7 million, or 13.1%, from the three months ended March 31, 2020, due to a $74.1 million, or 12.1%, increase in base fees and a $7.6 million increase in performance-based fees. The increase in base fees is primarily due to a 14.4% increase in average AUM.

Institutional investment advisory and services fees for the three months ended March 31, 2021 increased by $21.2 million, or 18.8%, from the three months ended March 31, 2020, due to a $19.1 million, or 17.3%, increase in base fees and a $2.1 million increase in performance-based fees. The increase in base fees is primarily due a 13.3% increase in average AUM, as well as a higher portfolio fee rate.

Retail investment advisory and services fees for the three months ended March 31, 2021 increased by $36.2 million, or 12.2%, from the three months ended March 31, 2020, due to a $34.0 million, or 11.5% increase in base fees and a $2.2 million increase in performance-based fees. The increase in base fees is primarily due to a 17.1% increase in average AUM, partially offset by a lower portfolio fee rate.

Private Wealth Management investment advisory and services fees for the three months ended March 31, 2021 increased by $24.3 million, or 11.5%, from the three months ended March 31, 2020, due to a $21.0 million, or 10.2%, increase in base fees and a $3.3 million increase in performance-based fees. The increase in base fees is primarily due to an 11.1% increase in average AUM.

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Bernstein Research Services

We earn revenues for providing investment research to, and executing brokerage transactions for, institutional clients. These clients compensate us principally by directing us to execute brokerage transactions on their behalf, for which we earn commissions, and to a lesser extent, but increasingly, by paying us directly for research through commission sharing agreements or cash payments.

Revenues from Bernstein Research Services for the three months ended March 31, 2021 decreased $10.2 million, or 7.9%, from the three months ended March 31, 2020, due to reduced customer trading activity driven by fewer trading days and decreased market volatility, as compared to the COVID-related significant surge in trading volume experienced during the three months ended March 31, 2020.

Distribution Revenues

Two of our subsidiaries act as distributors and/or placement agents of company-sponsored mutual funds and receive distribution services fees from certain of those funds as partial reimbursement of the distribution expenses they incur. Period-over-period fluctuations of distribution revenues typically are in line with fluctuations of the corresponding average AUM of these mutual funds.

Distribution revenues for the three months ended March 31, 2021 increased $16.7 million, or 12.8%, from the three months ended March 31, 2020, primarily due to the corresponding average AUM of these mutual funds increasing 12.4%.

Dividend and Interest Income and Interest Expense

Dividend and interest income consists primarily of investment income and interest earned on customer margin balances and U.S. Treasury Bills as well as dividend and interest income in our consolidated company-sponsored investment funds. Interest expense principally reflects interest accrued on cash balances in customers’ brokerage accounts.

Dividend and interest income for the three months ended March 31, 2021 decreased $11.8 million, or 57.6%, from the three months ended March 31, 2020, primarily due to lower interest earned on customer margin balances and U.S. Treasury Bills and lower dividend and interest income in our consolidated company-sponsored investment funds. Interest expense for the three months ended March 31, 2021 decreased $8.2 million, or 87.7%, from the three months ended March 31, 2020, due to lower interest paid on cash balances in customers' brokerage accounts.

Investment Gains (Losses)

Investment gains (losses) consist primarily of realized and unrealized investment gains or losses on: (i) employee long-term incentive compensation-related investments, (ii) U.S. Treasury Bills, (iii) market-making in exchange-traded options and equities, (iv) seed capital investments, (v) derivatives and (vi) investments in our consolidated company-sponsored investment funds. Investment gains (losses) also include equity in earnings of proprietary investments in limited partnership hedge funds that we sponsor and manage.

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Investment gains (losses) are as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Long-term incentive compensation-related investments:
Realized gains	$	2,052	$	1,412
Unrealized (losses)	(40)		(8,511)
Investments held by consolidated company-sponsored investment funds:
Realized gains (losses)	1,342		(3,193)
Unrealized (losses)	(6,941)		(52,115)
Seed capital investments:
Realized gains (losses)
Seed capital and other	2,557		(2,653)
Derivatives	(7,847)		31,183
Unrealized gains (losses)
Seed capital and other	567		(11,926)
Derivatives	10,166		(1,600)
Brokerage-related investments:
Realized gains (losses)	122		(453)
Unrealized (losses) gains	(50)		3,550
	$	1,928	$	(44,306)

Other Revenues

Other revenues consist of fees earned for transfer agency services provided to company-sponsored mutual funds, fees earned for administration and recordkeeping services provided to company-sponsored mutual funds and the general accounts of EQH and its subsidiaries, and other miscellaneous revenues. Other revenues for the three months ended March 31, 2021 increased $2.2 million, or 8.6%, compared to the corresponding period in 2020, primarily due to higher shareholder servicing fees and higher brokerage income.

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Expenses

The components of expenses are as follows:

	Three Months Ended March 31,
	2021		2020		$ Change		% Change
	(in thousands)
Employee compensation and benefits	$	406,059	$	362,272	$	43,787	12.1	%
Promotion and servicing:
Distribution-related payments	162,254		140,145		22,109		15.8
Amortization of deferred sales commissions	7,899		5,526		2,373		42.9
Trade execution, marketing, T&E and other	46,678		55,610		(8,932)		(16.1)
	216,831		201,281		15,550		7.7
General and administrative	120,223		122,267		(2,044)		(1.7)
Contingent payment arrangements	796		793		3		0.4
Interest on borrowings	1,294		2,834		(1,540)		(54.3)
Amortization of intangible assets	1,479		6,486		(5,007)		(77.2)
Total	$	746,682	$	695,933	$	50,749	7.3

Employee Compensation and Benefits

Employee compensation and benefits consist of base compensation (including salaries and severance), annual short-term incentive compensation awards (cash bonuses), annual long-term incentive compensation awards, commissions, fringe benefits and other employment costs (including recruitment, training, temporary help and meals).

Compensation expense as a percentage of net revenues was 40.3% and 41.4% for the three months ended March 31, 2021 and 2020, respectively. Compensation expense generally is determined on a discretionary basis and is primarily a function of our firm’s current-year financial performance. The amounts of incentive compensation we award are designed to motivate, reward and retain top talent while aligning our executives' interests with the interests of our Unitholders. Senior management, with the approval of the Compensation Committee of the Board of Directors of AllianceBernstein Corporation (“Compensation Committee”), periodically confirms that the appropriate metric to consider in determining the amount of incentive compensation is the ratio of adjusted employee compensation and benefits expense to adjusted net revenues. Adjusted net revenues used in the adjusted compensation ratio are the same as the adjusted net revenues presented as a non-GAAP measure (discussed earlier in this Item 2). Adjusted employee compensation and benefits expense is total employee compensation and benefits expense minus other employment costs such as recruitment, training, temporary help and meals (which were 0.7% and 1.0%, respectively, of adjusted net revenues for the three months ended March 31, 2021), and excludes the impact of mark-to-market vesting expense, as well as dividends and interest expense, associated with employee long-term incentive compensation-related investments and the amortization expense associated with the awards issued by EQH to our firm's CEO relating to his role as a member of the EQH Management Committee. Senior management, with the approval of the Compensation Committee, has established as an objective that adjusted employee compensation and benefits expense generally should not exceed 50% of our adjusted net revenues, except in unexpected or unusual circumstances. Also, our adjusted compensation ratio reflects a balancing of the need to keep compensation levels competitive with industry peers in order to attract, motivate and retain highly-qualified talent with the need to maintain strong operating leverage in our business. The Compensation Committee works with management to help ensure both needs are sufficiently addressed. Our ratio of adjusted compensation expense as a percentage of adjusted net revenues was 48.5% for the three months ended March 31, 2021 and 2020.

For the three months ended March 31, 2021, employee compensation and benefits expense increased $43.8 million, or 12.1%, compared to the three months ended March 31, 2020, primarily due to higher incentive compensation of $39.1 million, higher fringes of $4.2 million and higher base compensation of $1.9 million, partially offset by lower other employment costs of $1.6 million.

Promotion and Servicing

Promotion and servicing expenses include distribution-related payments to financial intermediaries for distribution of AB mutual funds and amortization of deferred sales commissions paid to financial intermediaries for the sale of back-end load

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shares of AB mutual funds. Also included in this expense category are costs related to travel and entertainment, advertising and promotional materials.

Promotion and servicing expenses increased $15.6 million, or 7.7%, during the three months ended March 31, 2021 compared to the three months ended March 31, 2020. The increase primarily was due to higher distribution-related payments of $22.1 million and higher amortization of deferred sales commissions of $2.4 million, partially offset by lower travel and entertainment expenses of $6.8 million and lower marketing and communication expenses of $3.0 million. The decrease in travel and entertainment and marketing expense is primarily a result of cost savings associated with the COVID-19 pandemic; we expect these costs to continue to increase in 2021 and further normalize in 2022, as the pandemic recedes.

General and Administrative

General and administrative expenses include portfolio services expenses, technology expenses, professional fees and office-related expenses (occupancy, communications and similar expenses). General and administrative expenses as a percentage of net revenues were 11.9% and 14.0% for the three months ended March 31, 2021 and 2020, respectively. General and administrative expenses decreased $2.0 million, or 1.7%, during the three months ended March 31, 2021 compared to the corresponding period in 2020, primarily due to lower portfolio servicing fees of $2.1 million.

Contingent Payment Arrangements

Contingent payment arrangements reflect changes in estimates of contingent payment liabilities associated with acquisitions in previous periods, as well as accretion expense of these liabilities. There were no changes in our estimates during the first three months of 2021 or 2020.

Income Taxes

AB, a private limited partnership, is not subject to federal or state corporate income taxes. However, AB is subject to a 4.0% New York City unincorporated business tax (“UBT”). Our domestic corporate subsidiaries are subject to federal, state and local income taxes and generally are included in the filing of a consolidated federal income tax return. Separate state and local income tax returns also are filed. Foreign corporate subsidiaries generally are subject to taxes in the jurisdictions where they are located.

Income tax expense for the three months ended March 31, 2021 increased $7.3 million, or 76.7%, compared to the three months ended March 31, 2020. The increase was primarily due to a higher effective tax rate for the three months ended March 31, 2021 of 6.4% compared to 5.3% for the corresponding period in 2020, driven by an increase in one-time discrete items. There were no material changes to uncertain tax positions (FIN 48 reserves) or valuation allowances against deferred tax assets for the three months ended March 31, 2021.

Net Income (Loss) of Consolidated Entities Attributable to Non-Controlling Interests

Net income (loss) of consolidated entities attributable to non-controlling interests primarily consists of limited partner interests owned by other investors in our consolidated company-sponsored investment funds. For the three months ended March 31, 2021, we had $0.3 million of net losses of consolidated entities attributable to non-controlling interests compared to net losses of $25.6 million for the three months ended March 31, 2020. Fluctuations period-to-period result primarily from the number of consolidated company-sponsored investment funds and their respective market performance.

CAPITAL RESOURCES AND LIQUIDITY

Cash flows from operating activities primarily include the receipt of investment advisory and services fees and other revenues offset by the payment of operating expenses incurred in the normal course of business. Our cash flows from operating activities have historically been positive and sufficient in supporting our operations. We do not anticipate this to change in the foreseeable future. Cash flows from investing activities generally consist of small capital expenditures and, when applicable, business acquisitions. Cash flows from financing activities primarily consist of issuance and repayment of debt and the repurchase of AB Holding units to fund our long-term deferred compensation plans. We are required to distribute all of our Available Cash Flow to our Unitholders and the General Partner.

During the first three months of 2021, net cash provided by operating activities was $328.0 million, compared to $285.9 million during the corresponding 2020 period. The change reflects lower net purchases of broker-dealer investments of $71.1 million, a

47

decrease in other assets of $49.1 million and an increase in broker-dealer related payables (net of receivables and segregated U.S. Treasury bills activity) of $47.1 million, partially offset by net activity of our consolidated funds of $148.3 million.

During the first three months of 2021, net cash used in investing activities was $19.4 million, compared to $14.8 million during the corresponding 2020 period. The change is primarily due to higher purchases of furniture, equipment and leasehold improvements of $12.3 million, partially offset by lower cash paid for acquisitions of $7.7 million.

During the first three months of 2021, net cash used in financing activities was $381.9 million, compared to net cash provided of $113.3 million during the corresponding 2020 period. The change reflects higher net repayments of debt of $424.8 million, a decrease in overdrafts payable of $86.6 million and higher distributions to the General Partner and Unitholders of $35.9 million as a result of higher earnings (distributions on earnings are paid one quarter in arrears), partially offset by lower redemptions of non-controlling interests of consolidated company-sponsored investment funds of $61.6 million.

As of March 31, 2021, AB had $1.0 billion of cash and cash equivalents (excluding cash and cash equivalents of consolidated company-sponsored investment funds), all of which is available for liquidity but consist primarily of cash on deposit for our broker-dealers related to various customer clearing activities, and cash held by foreign subsidiaries of $608.2 million.

Debt and Credit Facilities

See Note 16 to AB’s condensed consolidated financial statements contained in Item 1, for disclosures relating to our debt and credit facilities.

Our financial condition and access to public and private debt markets should provide adequate liquidity for our general business needs. Management believes that cash flow from operations and the issuance of debt and AB Units or AB Holding Units will provide us with the resources we need to meet our financial obligations. See “Cautions Regarding Forward-Looking Statements.”

COMMITMENTS AND CONTINGENCIES

AB’s capital commitments, which consist primarily of operating leases for office space, generally are funded from future operating cash flows.

We have signed a lease which commences in 2024, relating to approximately 166,000 square feet of space in New York City. Our estimated total base rent obligation (excluding taxes, operating expenses and utilities) over the 20-year lease term is approximately $393.0 million.

During 2010, as general partner of AllianceBernstein U.S. Real Estate L.P. (“Real Estate Fund”), we committed to invest $25.0 million in the Real Estate Fund. As of March 31, 2021, we had funded $22.4 million of this commitment. During 2014, as general partner of AllianceBernstein U.S. Real Estate II L.P. (“Real Estate Fund II”), we committed to invest $27.3 million, as amended in 2020, in Real Estate Fund II. As of March 31, 2021, we had funded $20.8 million of this commitment.

See Note 12 for discussion of contingencies.

CRITICAL ACCOUNTING ESTIMATES

The preparation of the condensed consolidated financial statements and notes to condensed consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses.

There have been no updates to our critical accounting estimates from those disclosed in “Management’s Discussion and Analysis of Financial Condition” in our Form 10-K for the year ended December 31, 2020.

ACCOUNTING PRONOUNCEMENTS

See Note 2 to AB’s condensed consolidated financial statements contained in Item 1.

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CAUTIONS REGARDING FORWARD-LOOKING STATEMENTS

Certain statements provided by management in this report and in the portion of AB’s Form 10-Q attached hereto as Exhibit 99.1 are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results to differ materially from future results expressed or implied by such forward-looking statements. The most significant of these factors include, but are not limited to, the following: the performance of financial markets, the investment performance of sponsored investment products and separately-managed accounts, general economic conditions, industry trends, future acquisitions, integration of acquired companies, competitive conditions and government regulations, including changes in tax regulations and rates and the manner in which the earnings of publicly-traded partnerships are taxed. We caution readers to carefully consider such factors. Further, these forward-looking statements speak only as of the date on which such statements are made; we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements. For further information regarding these forward-looking statements and the factors that could cause actual results to differ, see “Risk Factors” in Part I, Item 1A of our Form 10-K for the year ended December 31, 2020 and Part II, Item 1A in this Form 10-Q. Any or all of the forward-looking statements that we make in our Form 10-K, this Form 10-Q, other documents we file with or furnish to the SEC, and any other public statements we issue, may turn out to be wrong. It is important to remember that other factors besides those listed in “Risk Factors” and those listed below could also adversely impact our revenues, financial condition, results of operations and business prospects.

The forward-looking statements referred to in the preceding paragraph, most of which directly affect AB but also affect AB Holding because AB Holding’s principal source of income and cash flow is attributable to its investment in AB, include statements regarding:

•Our belief that the cash flow AB Holding realizes from its investment in AB will provide AB Holding with the resources it needs to meet its financial obligations: AB Holding’s cash flow is dependent on the quarterly cash distributions it receives from AB. Accordingly, AB Holding’s ability to meet its financial obligations is dependent on AB’s cash flow from its operations, which is subject to the performance of the capital markets and other factors beyond our control.

•Our financial condition and ability to access the public and private capital markets providing adequate liquidity for our general business needs: Our financial condition is dependent on our cash flow from operations, which is subject to the performance of the capital markets, our ability to maintain and grow client assets under management and other factors beyond our control. Our ability to access public and private capital markets on reasonable terms may be limited by adverse market conditions, our firm’s credit ratings, our profitability and changes in government regulations, including tax rates and interest rates.

•The outcome of litigation: Litigation is inherently unpredictable, and excessive damage awards do occur. Though we have stated that we do not expect any pending legal proceedings to have a material adverse effect on our results of operations, financial condition or liquidity, any settlement or judgment with respect to a legal proceeding could be significant and could have such an effect.

•The possibility that we will engage in open market purchases of AB Holding Units to help fund anticipated obligations under our incentive compensation award program: The number of AB Holding Units AB may decide to buy in future periods, if any, to help fund incentive compensation awards depends on various factors, some of which are beyond our control, including the fluctuation in the price of an AB Holding Unit (NYSE: AB) and the availability of cash to make these purchases.

•Our determination that adjusted employee compensation expense should not exceed 50% of our adjusted net revenues:  Aggregate employee compensation reflects employee performance and competitive compensation levels. Fluctuations in our revenues and/or changes in competitive compensation levels could result in adjusted employee compensation expense exceeding 50% of our adjusted net revenues.

•Our Relocation Strategy: While the expenses, expense savings and EPU impact we expect will result from our Relocation Strategy are presented with numerical specificity, and we believe these figures to be reasonable as of the date of this report, the uncertainties surrounding the assumptions on which our estimates are based create a significant risk that our current estimates may not be realized. These assumptions include:

•the amount and timing of employee relocation costs, severance and overlapping compensation and occupancy costs we experience; and

•the timing for execution of each phase of our relocation implementation plan.

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•The Adverse Impact of COVID-19: The severity of any possible adverse impact on our AUM and revenues of any economic downturn caused by the COVID-19 pandemic will depend on the depth and length of the downturn and its impact on the companies in which we invest. Our conclusions about the possible continuing adverse impact on us is based on our assumptions that the recovery will be gradual and that there will be lasting high unemployment and economic damage. We believe that these assumptions are reasonable, but they may not be correct and economic conditions likely will differ from our assumptions.

Item 3.     Quantitative and Qualitative Disclosures About Market Risk

There have been no material changes in AB’s market risk from the information provided under “Quantitative and Qualitative Disclosures About Market Risk” in Part II, Item 7A of AB's Form 10-K for the year ended December 31, 2020.

Item 4.     Controls and Procedures

Disclosure Controls and Procedures

Each of AB Holding and AB maintains a system of disclosure controls and procedures that is designed to ensure that information required to be disclosed in our reports under the Exchange Act is (i) recorded, processed, summarized and reported in a timely manner, and (ii) accumulated and communicated to management, including the Chief Executive Officer ("CEO") and the Chief Financial Officer ("CFO"), to permit timely decisions regarding our disclosure.

As of the end of the period covered by this report, management carried out an evaluation, under the supervision and with the participation of the CEO and the CFO, of the effectiveness of the design and operation of the disclosure controls and procedures. Based on this evaluation, the CEO and the CFO concluded that the disclosure controls and procedures are effective.

Changes in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the first quarter of 2021 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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Part II

OTHER INFORMATION

Item 1.     Legal Proceedings

See Note 12 to the condensed consolidated financial statements contained in Part I, Item 1.

Item 1A.     Risk Factors

There have been no material changes to the risk factors from those appearing in our Annual Report on Form 10-K ("AB 10-K") for the fiscal year ended December 31, 2020.

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

AB Units bought by us or one of our affiliates during the first quarter of 2021 are as follows:

ISSUER PURCHASES OF EQUITY SECURITIES

Period	Total Number of AB Units Purchased	Average Price Paid Per AB Unit, net of Commissions		Total Number of AB Units Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of AB Units that May Yet Be Purchased Under the Plans or Programs
1/1/21 - 1/31/21	—	$	—	—	—
2/1/21 - 2/28/21	—	—		—	—
3/1/21 - 3/31/21(1)	1,400	37.00		—	—
Total	1,400	$	37.00	—	—

(1)During March 2021, AB purchased 1,400 AB Units in private transactions.

Item 3.     Defaults Upon Senior Securities

None.

Item 4.     Mine Safety Disclosures

None.

Item 5.     Other Information

None.

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Item 6.     Exhibits

31.1	Certification of Mr. Bernstein furnished pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Mr. Dibadj furnished pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1	Certification of Mr. Bernstein furnished for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
32.2	Certification of Mr. Dibadj furnished for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema.
101.CAL	XBRL Taxonomy Extension Calculation Linkbase.
101.LAB	XBRL Taxonomy Extension Label Linkbase.
101.PRE	XBRL Taxonomy Extension Presentation Linkbase.
101.DEF	XBRL Taxonomy Extension Definition Linkbase.
104	The cover page from the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2021, formatted in Inline XBRL (included in Exhibit 101).

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SIGNATURE

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:	April 29, 2021	ALLIANCEBERNSTEIN L.P.
		By:	/s/ Ali Dibadj
			Ali Dibadj
			Chief Financial Officer and Head of Strategy
		By:	/s/ William R. Siemers
			William R. Siemers
			Chief Accounting Officer

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EX-31.1

Exhibit 31.1

I, Seth P. Bernstein, certify that:

1.I have reviewed this quarterly report on Form 10-Q of AllianceBernstein L.P.;

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 15d-15(f)) for the registrant and have:

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

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

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

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; 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: April 29, 2021	/s/ Seth P. Bernstein
	Seth P. Bernstein
	President and Chief Executive Officer
	AllianceBernstein L.P.

EX-31.2

Exhibit 31.2

I, Ali Dibadj, certify that:

1.I have reviewed this quarterly report on Form 10-Q of AllianceBernstein L.P.;

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 15d-15(f)) for the registrant and have:

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

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

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

(d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; 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 financialreporting 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: April 29, 2021	/s/ Ali Dibadj
	Ali Dibadj
	Chief Financial Officer and Head of Strategy
	AllianceBernstein L.P.

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of AllianceBernstein L.P. (the “Company”) on Form 10-Q for the period ending March 31, 2021 to be filed with the Securities and Exchange Commission on or about April 29, 2021 (the “Report”), I, Seth P. Bernstein, President and Chief Executive Officer of the Company, certify, for the purpose of complying with Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Exchange Act; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: April 29, 2021	/s/ Seth P. Bernstein
	Seth P. Bernstein
	President and Chief Executive Officer
	AllianceBernstein L.P.

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of AllianceBernstein L.P. (the “Company”) on Form 10-Q for the period ending March 31, 2021 to be filed with the Securities and Exchange Commission on or about April 29, 2021 (the “Report”), I, Ali Dibadj, Chief Financial Officer and Head of Strategy of the Company, certify, for the purpose of complying with Rule 13a-14(b) or 15d-14(b) of the Securities Exchange Act of 1934 (the “Exchange Act”) and 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1)The Report fully complies with the requirements of section 13(a) or 15(d) of the Exchange Act; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: April 29, 2021	/s/ Ali Dibadj
	Ali Dibadj
	Chief Financial and Head of Strategy
	AllianceBernstein L.P.

XML

Cover Page	3 Months Ended
	Mar. 31, 2021 shares
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	000-29961
Entity Registrant Name	ALLIANCEBERNSTEIN L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-4064930
Entity Address, Address Line One	1345 Avenue of the Americas
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10105
City Area Code	212
Local Phone Number	969-1000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	272,675,165
Entity Central Index Key	0001109448
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false

XML

Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
ASSETS
Cash and cash equivalents	$ 960,452	$ 1,037,400
Cash and securities segregated, at fair value (cost: $1,412,296 and $1,752,483)	1,412,873	1,753,478
Receivables, net:
Brokers and dealers	197,444	92,638
Brokerage clients	1,814,044	1,713,377
AB funds fees	260,598	325,407
Other fees	143,819	148,746
Investments:
Long-term incentive compensation-related	58,730	60,114
Other	140,928	193,261
Assets of consolidated company-sponsored investment funds:
Other assets	327,680	264,418
Furniture, equipment and leasehold improvements, net	153,326	147,874
Goodwill	3,095,093	3,082,778
Intangible assets, net	42,843	44,496
Deferred sales commissions, net	67,119	64,066
Right-of-use assets	412,839	418,455
Total assets	9,454,866	9,697,840
Payables:
Brokers and dealers	278,936	216,403
Securities sold not yet purchased	8,307	17,791
Brokerage clients	3,176,132	3,440,266
AB mutual funds	86,002	65,550
Accounts payable and accrued expenses	202,366	197,657
Lease liabilities	495,356	505,549
Accrued compensation and benefits	402,507	335,122
Debt	625,000	675,000
Total liabilities	5,317,137	5,483,958
Commitments and contingencies (See Note 12)
Redeemable non-controlling interest	88,567	102,359
Capital:
General Partner	42,022	41,776
Limited partners: 272,675,165 and 270,509,658 units issued and outstanding	4,253,904	4,229,485
Receivables from affiliates	(1,725)	(8,316)
AB Holding Units held for long-term incentive compensation plans	(143,807)	(57,219)
Accumulated other comprehensive loss	(101,232)	(94,203)
Partners’ capital attributable to AB Unitholders	4,049,162	4,111,523
Total liabilities, redeemable non-controlling interest and capital	9,454,866	9,697,840
Company-sponsored investment funds
Assets of consolidated company-sponsored investment funds:
Cash and cash equivalents	38,561	36,506
Investments	308,043	302,582
Other assets	20,474	12,244
Payables:
Redeemable non-controlling interest	88,567	102,359
VIEs
Payables:
Liabilities of consolidated company-sponsored investment funds	$ 42,531	$ 30,620

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Condensed Consolidated Statements of Financial Condition (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Cash and securities segregated, at cost	$ 1,412,296	$ 1,752,483
Limited partners, units issued (in units)	272,675,165	270,509,658
Limited partners, units outstanding (in units)	272,675,165	270,509,658

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Condensed Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues:
Revenue subject to contracts with customers	$ 997,465	$ 907,320
Dividend and interest income	8,684	20,465
Investment gains (losses)	1,928	(44,306)
Other revenues	27,711	25,511
Total revenues	1,008,410	883,475
Less: Interest expense	1,144	9,319
Net revenues	1,007,266	874,156
Expenses:
Employee compensation and benefits	406,059	362,272
Promotion and servicing:
Amortization of deferred sales commissions	7,899	5,526
Trade execution, marketing, T&E and other	46,678	55,610
General and administrative	120,223	122,267
Contingent payment arrangements	796	793
Interest on borrowings	1,294	2,834
Amortization of intangible assets	1,479	6,486
Total expenses	746,682	695,933
Operating income	260,584	178,223
Income taxes	16,745	9,474
Net income	243,839	168,749
Net (loss) of consolidated entities attributable to non-controlling interests	(292)	(25,571)
Net income attributable to AB Unitholders	$ 244,131	$ 194,320
Net income per AB Unit:
Basic (in dollars per unit)	$ 0.89	$ 0.71
Diluted (in dollars per unit)	$ 0.89	$ 0.71
Investment advisory and services fees
Revenues:
Revenue subject to contracts with customers	$ 703,466	$ 621,725
Bernstein research services
Revenues:
Revenue subject to contracts with customers	119,021	129,223
Distribution related
Revenues:
Revenue subject to contracts with customers	147,600	130,857
Promotion and servicing:
Distribution-related payments	$ 162,254	$ 140,145

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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 243,839	$ 168,749
Other comprehensive (loss):
Foreign currency translation adjustments, before tax	(7,138)	(21,396)
Income tax benefit	22	73
Foreign currency translation adjustments, net of tax	(7,116)	(21,323)
Changes in employee benefit related items:
Amortization of prior service cost	6	6
Recognized actuarial gain	81	325
Changes in employee benefit related items	87	331
Income tax (expense)	0	(77)
Employee benefit related items, net of tax	87	254
Other comprehensive (loss)	(7,029)	(21,069)
Less: Comprehensive (loss) in consolidated entities attributable to non-controlling interests	(292)	(25,571)
Comprehensive income attributable to AB Unitholders	$ 237,102	$ 173,251

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Condensed Consolidated Statements of Changes in Partners' Capital - USD ($) $ in Thousands	Total	Receivables from Affiliates	AB Holding Units held for Long-term Incentive Compensation Plans	Accumulated Other Comprehensive Income (Loss)	Partners' Capital	General Partner’s Capital	Limited Partners' Capital
Balance, beginning of period at Dec. 31, 2019		$ (9,011)	$ (76,310)	$ (113,004)		$ 41,225	$ 4,174,201
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 168,749					1,943	192,377
Cash distributions						(2,542)	(251,261)
Long-term incentive compensation plans activity		184	7,407			2	335
Issuance (retirement) of AB Units, net			5,763			(57)	(5,706)
Capital contributions from AB Holding		(452)
Purchases of AB Holding Units to fund long-term compensation plans, net			(17,750)
Re-valuation of AB Holding Units held in rabbi trust			(436)
Other			12
Foreign currency translation adjustment, net of tax	(21,323)			(21,323)
Changes in employee benefit related items, net of tax	254			254
Balance, end of period at Mar. 31, 2020		(9,279)	(81,314)	(134,073)	$ 3,925,851	40,571	4,109,946
Balance, beginning of period at Dec. 31, 2020		(8,316)	(57,219)	(94,203)		41,776	4,229,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	243,839					2,441	241,690
Cash distributions						(2,898)	(286,813)
Long-term incentive compensation plans activity		142	18,002			(7)	(708)
Issuance (retirement) of AB Units, net			(71,013)			710	70,250
Capital contributions from AB Holding		6,449
Purchases of AB Holding Units to fund long-term compensation plans, net			(35,854)
Re-valuation of AB Holding Units held in rabbi trust			2,277
Other			0
Foreign currency translation adjustment, net of tax	(7,116)			(7,116)
Changes in employee benefit related items, net of tax	$ 87			87
Balance, end of period at Mar. 31, 2021		$ (1,725)	$ (143,807)	$ (101,232)	$ 4,049,162	$ 42,022	$ 4,253,904

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Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income	$ 243,839	$ 168,749
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred sales commissions	7,899	5,526
Non-cash long-term incentive compensation expense	18,144	7,591
Depreciation and other amortization	32,009	36,156
Unrealized losses (gains) on investments	(175)	20,585
Other, net	10,181	(1,324)
Changes in assets and liabilities:
Decrease (increase) in securities, segregated	340,605	(917,696)
(Increase) in receivables	(117,622)	(615,055)
Decrease (increase) in investments	53,493	(17,557)
(Increase) in deferred sales commissions	(10,952)	(18,510)
(Increase) decrease in right-of-use assets	(15,979)	134
Increase in other assets	(68,957)	(118,038)
(Decrease) increase in payables	(218,887)	1,492,200
(Decrease) in lease liabilities	(9,163)	(23,968)
(Decrease) increase in accounts payable and accrued expenses	(1,566)	4,663
Increase in accrued compensation and benefits	66,909	70,792
Net cash provided by operating activities	327,999	285,910
Cash flows from investing activities:
Purchases of furniture, equipment and leasehold improvements	(15,584)	(3,321)
Acquisition of business, net of cash acquired	(3,795)	(11,473)
Net cash used in investing activities	(19,379)	(14,794)
Cash flows from financing activities:
(Repayment) borrowings of debt, net	(50,000)
(Repayment) borrowings of debt, net		374,814
(Decrease) increase in overdrafts payable	(1,190)	85,395
Distributions to General Partner and Unitholders	(289,711)	(253,803)
Capital contributions from (to) affiliates	6,096
Capital contributions from (to) affiliates		(699)
Interest accretion, net of (payments) on contingent payment arrangements	796	793
Additional investments by AB Holding with proceeds from exercise of compensatory options to buy AB Holding Units	1,914	147
Purchases of AB Holding Units to fund long-term incentive compensation plan awards, net	(35,854)	(17,750)
Other	(475)	(504)
Net cash (used in) provided by financing activities	(381,924)	113,302
Effect of exchange rate changes on cash and cash equivalents	(1,589)	(13,049)
Net (decrease) increase in cash and cash equivalents	(74,893)	371,369
Cash and cash equivalents as of beginning of the period	1,073,906	691,171
Cash and cash equivalents as of end of the period	999,013	1,062,540
Non-cash investing activities:
Fair value of assets acquired (less cash acquired of $2.8 million and $0.6 million, respectively)	12,962	11,908
Fair value of liabilities assumed	1,642	435
Non-cash financing activities:
Payables recorded under contingent payment arrangements	7,525	0
Company-sponsored investment funds
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized losses (gains) on investments	6,941	52,115
Changes in assets and liabilities:
Decrease (increase) in investments	(12,401)	85,418
Increase in other assets	3,681	54,129
Cash flows from financing activities:
(Redemptions) of non-controlling interest in consolidated company-sponsored investment funds, net	$ (13,500)	$ (75,091)

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Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Cash Flows [Abstract]
Cash acquired from acquisition	$ 2.8	$ 0.6

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Business Description Organization and Basis of Presentation

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Business Description Organization and Basis of Presentation

Business Description Organization and Basis of Presentation

Business Description

We provide diversified investment management, research and related services globally to a broad range of clients. Our principal services include:

•    Institutional Services – servicing our institutional clients, including private and public pension plans, foundations and endowments, insurance companies, central banks and governments worldwide, and affiliates such as Equitable Holdings, Inc. ("EQH") and its subsidiaries, by means of separately-managed accounts, sub-advisory relationships, structured products, collective investment trusts, mutual funds, hedge funds and other investment vehicles.

•    Retail Services – servicing our retail clients, primarily by means of retail mutual funds sponsored by AB or an affiliated company, sub-advisory relationships with mutual funds sponsored by third parties, separately-managed account programs sponsored by financial intermediaries worldwide and other investment vehicles.

•    Private Wealth Management Services – servicing our private clients, including high-net-worth individuals and families, trusts and estates, charitable foundations, partnerships, private and family corporations, and other entities, by means of separately-managed accounts, hedge funds, mutual funds and other investment vehicles.

•Bernstein Research Services – servicing institutional investors, such as pension fund, hedge fund and mutual fund managers, seeking high-quality fundamental research, quantitative services and brokerage-related services in equities and listed options.

We also provide distribution, shareholder servicing, transfer agency services and administrative services to the mutual funds we sponsor.

Our high-quality, in-depth research is the foundation of our business. Our research disciplines include economic, fundamental equity, fixed income and quantitative research.  In addition, we have expertise in multi-asset strategies, wealth management, environmental, social and corporate governance ("ESG"), and alternative investments.

We provide a broad range of investment services with expertise in:

•Actively-managed equity strategies, with global and regional portfolios across capitalization ranges, concentration ranges and investment strategies, including value, growth and core equities;

•Actively-managed traditional and unconstrained fixed income strategies, including taxable and tax-exempt strategies;

•Alternative investments, including hedge funds, fund of funds, direct lending, real estate and private equity;

•Multi-asset solutions and services, including dynamic asset allocation, customized target-date funds and target-risk funds; and

•Some passive management, including index and enhanced index strategies.

Organization

As of March 31, 2021, EQH owned approximately 4.0% of the issued and outstanding units representing assignments of beneficial ownership of limited partnership interests in AllianceBernstein Holding L.P. (“AB Holding Units”). AllianceBernstein Corporation (an indirect wholly-owned subsidiary of EQH, “General Partner”) is the general partner of both AllianceBernstein Holding L.P. (“AB Holding”) and AB. AllianceBernstein Corporation owns 100,000 general partnership units in AB Holding and a 1% general partnership interest in AB.

As of March 31, 2021, the ownership structure of AB, including limited partnership units outstanding as well as the general partner's 1% interest, was as follows:

EQH and its subsidiaries	62.8	%
AB Holding	36.5
Unaffiliated holders	0.7
	100.0	%

Including both the general partnership and limited partnership interests in AB Holding and AB, EQH and its subsidiaries had an approximate 64.3% economic interest in AB as of March 31, 2021.

Basis of Presentation

The interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). In the opinion of management, all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the interim results, have been made. The preparation of the condensed consolidated financial statements requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the interim reporting periods. Actual results could differ from those estimates. The condensed consolidated statement of financial condition as of December 31, 2020 was derived from audited financial statements. Certain disclosures included in the annual financial statements have been condensed or omitted from these financial statements as they are not required for interim financial statements under principles generally accepted in the United States of America ("GAAP") and the rules of the Securities and Exchange Commission.

Principles of Consolidation

The condensed consolidated financial statements include AB and its majority-owned and/or controlled subsidiaries, and the consolidated entities that are considered to be variable interest entities (“VIEs”) and voting interest entities (“VOEs”) in which AB has a controlling financial interest. Non-controlling interests on the condensed consolidated statements of financial condition include the portion of consolidated company-sponsored investment funds in which we do not have direct equity ownership. All significant inter-company transactions and balances among the consolidated entities have been eliminated.

Reclassifications

During 2021, prior period amounts previously presented as net issuance (repayment) of commercial paper, proceeds (repayment) of EQH facility and proceeds (repayment) of bank loans are now combined and presented as net repayments (borrowings) of debt in the condensed consolidated statements of cash flows to conform to the current period's presentation.

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Significant Accounting Policies

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Significant Accounting Policies

Significant Accounting Policies

Recently Adopted Accounting Pronouncements

In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Topic 715-20). The amendment modifies the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans. We adopted this standard prospectively on January 1, 2021. The adoption of this standard did not have a material impact on our financial condition or results of operations.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify US GAAP for other areas of Topic 740 by clarifying and amending the existing guidance. We adopted this standard prospectively on January 1, 2021. The adoption of this standard did not have a material impact on our financial condition or results of operations.

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Revenue Recognition

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Revenue Recognition

Revenues for the three months ended March 31, 2021 and 2020 consisted of the following:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Subject to contracts with customers:
Investment advisory and services fees
Base fees	$	687,691	$	613,587
Performance-based fees	15,775		8,138
Bernstein research services	119,021		129,223
Distribution revenues
All-in-management fees	85,182		86,357
12b-1 fees	20,034		19,453
Other	42,384		25,047
Other revenues
Shareholder servicing fees	21,695		20,843
Other	5,683		4,672
	997,465		907,320
Not subject to contracts with customers:
Dividend and interest income, net of interest expense	7,540		11,146
Investment gains (losses)	1,928		(44,306)
Other revenues	333		(4)
	9,801		(33,164)
Total net revenues	$	1,007,266	$	874,156

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Long-term Incentive Compensation Plans

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Long-term Incentive Compensation Plans

Long-term Incentive Compensation Plans

We maintain several unfunded, non-qualified long-term incentive compensation plans, under which we grant annual awards to employees, generally in the fourth quarter, and to members of the Board of Directors of the General Partner, who are not employed by our company or by any of our affiliates (“Eligible Directors”).

We fund our restricted AB Holding Unit awards either by purchasing AB Holding Units on the open market or purchasing newly-issued AB Holding Units from AB Holding, and then keeping these AB Holding Units in a consolidated rabbi trust until delivering them or retiring them. In accordance with the Amended and Restated Agreement of Limited Partnership of AB (“AB Partnership Agreement”), when AB purchases newly-issued AB Holding Units from AB Holding, AB Holding is

required to use the proceeds it receives from AB to purchase the equivalent number of newly-issued AB Units, thus increasing its percentage ownership interest in AB. AB Holding Units held in the consolidated rabbi trust are corporate assets in the name of the trust and are available to the general creditors of AB.

Repurchases of AB Holding Units for the three months ended March 31, 2021 and 2020 consisted of the following:

	Three Months Ended March 31,
	2021		2020
	(in millions)
Total amount of AB Holding Units Purchased (1)	1.0		0.9
Total Cash Paid for AB Holding Units Purchased (1)	$	37.4	$	19.8
Open Market Purchases of AB Holding Units Purchased (2)	0.6		0.8
Total Cash Paid for Open Market Purchases of AB Holding Units (2)	$	24.2	$	17.3

(1) Purchased on a trade date basis.

(2) The remainder related to purchases of AB Holding Units from employees to fulfill statutory tax withholding requirements at the time of delivery of long-term incentive compensation award.

Purchases of AB Holding Units reflected on the condensed consolidated statements of cash flows are net of AB Holding Unit purchases by employees as part of a distribution reinvestment election.

Each quarter, we consider whether to implement a plan to repurchase AB Holding Units pursuant to Rules 10b5-1 and 10b-18 under the Securities Exchange Act of 1934, as amended ("Exchange Act"). A plan of this type allows a company to repurchase its shares at times when it otherwise might be prevented from doing so because of self-imposed trading blackout periods or because it possesses material non-public information. Each broker we select has the authority under the terms and limitations specified in the plan to repurchase AB Holding Units on our behalf. Repurchases are subject to regulations promulgated by the SEC as well as certain price, market volume and timing constraints specified in the plan. The plan adopted during the first quarter of 2021 expired at the close of business on April 28, 2021. We may adopt additional plans in the future to engage in open-market purchases of AB Holding Units to help fund anticipated obligations under our incentive compensation award program and for other corporate purposes.

During the first three months of 2021 and 2020, we awarded to employees and Eligible Directors 3.4 million and 0.1 million restricted AB Holding Unit awards, respectively. We used AB Holding Units repurchased during the applicable period and newly-issued AB Holding Units to fund these awards.

During the first three months of 2021 and 2020, AB Holding issued 0.1 million and 5,182 AB Holding Units, respectively, upon exercise of options to buy AB Holding Units. AB Holding used the proceeds of $1.9 million and $0.1 million, respectively, received from award recipients as payment in cash for the exercise price to purchase the equivalent number of newly-issued AB Units.

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Net Income per Unit

3 Months Ended

Mar. 31, 2021

Earnings Per Unit [Abstract]

Net Income per Unit

Net Income per Unit

Basic net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the basic weighted average number of limited partnership units outstanding for each period. Diluted net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the total of the diluted weighted average number of limited partnership units outstanding for each period.

	Three Months Ended March 31,
	2021		2020
	(in thousands, except per unit amounts)
Net income attributable to AB Unitholders	$	244,131	$	194,320
Weighted average limited partnership units outstanding – basic	272,332		270,498
Dilutive effect of compensatory options to buy AB Holding Units	32		32
Weighted average limited partnership units outstanding – diluted	272,364		270,530
Basic net income per AB Unit	$	0.89	$	0.71
Diluted net income per AB Unit	$	0.89	$	0.71

		Three Months Ended March 31,
		2021	2020
	(amounts as shown)
Anti-dilutive options excluded from diluted net income		—	29,056

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Cash Distributions

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Cash Distributions

Cash Distributions

AB is required to distribute all of its Available Cash Flow, as defined in the AB Partnership Agreement, to its Unitholders and to the General Partner. Available Cash Flow can be summarized as the cash flow received by AB from operations minus such amounts as the General Partner determines, in its sole discretion, should be retained by AB for use in its business, or plus such amounts as the General Partner determines, in its sole discretion, should be released from previously retained cash flow.

Typically, Available Cash Flow has been the adjusted diluted net income per unit for the quarter multiplied by the number of general and limited partnership interests at the end of the quarter. In future periods, management anticipates that Available Cash Flow will be based on adjusted diluted net income per unit, unless management determines, with the concurrence of the Board of Directors, that one or more adjustments that are made for adjusted net income should not be made with respect to the Available Cash Flow calculation.

On April 29, 2021, the General Partner declared a distribution of $0.88 per AB Unit, representing a distribution of Available Cash Flow for the three months ended March 31, 2021. The General Partner, as a result of its 1% general partnership interest, is entitled to receive 1% of each distribution. The distribution is payable on May 27, 2021 to holders of record on May 10, 2021.

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Cash and Securities Segregated Under Federal Regulations and Other Requirements	3 Months Ended
	Mar. 31, 2021
Brokers and Dealers [Abstract]
Cash and Securities Segregated Under Federal Regulations and Other Requirements	Cash and Securities Segregated Under Federal Regulations and Other Requirements As of March 31, 2021 and December 31, 2020, $1.4 billion and $1.8 billion, respectively, of U.S. Treasury Bills were segregated in a special reserve bank custody account for the exclusive benefit of our brokerage customers under Rule 15c3-3 of the Exchange Act.

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Investments

3 Months Ended

Mar. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Investments

Investments

Investments consist of:

	March 31, 2021		December 31, 2020
	(in thousands)
Equity securities:
Long-term incentive compensation-related	$	28,645	$	34,351
Seed capital	74,241		75,766
Other	11,469		55,439
Exchange-traded options	4,156		7,527
Investments in limited partnership hedge funds:
Long-term incentive compensation-related	30,085		25,762
Seed capital	17,363		16,646
Time deposits	18,233		18,602
Other	15,466		19,282
Total investments	$	199,658	$	253,375

Total investments related to long-term incentive compensation obligations of $58.7 million and $60.1 million as of March 31, 2021 and December 31, 2020, respectively, consist of company-sponsored mutual funds and hedge funds. For long-term incentive compensation awards granted before 2009, we typically made investments in company-sponsored mutual funds and hedge funds that were notionally elected by plan participants and maintained them (and continue to maintain them) in a consolidated rabbi trust or separate custodial account. The rabbi trust and custodial account enable us

to hold such investments separate from our other assets for the purpose of settling our obligations to participants. The investments held in the rabbi trust and custodial account remain available to the general creditors of AB.

The underlying investments of hedge funds in which we invest include long and short positions in equity securities, fixed income securities (including various agency and non-agency asset-based securities), currencies, commodities and derivatives (including various swaps and forward contracts). These investments are valued at quoted market prices or, where quoted market prices are not available, are fair valued based on the pricing policies and procedures of the underlying funds.

We allocate seed capital to our investment teams to help develop new products and services for our clients. A portion of our seed capital trading investments are equity and fixed income products, primarily in the form of separately-managed account portfolios, U.S. mutual funds, Luxembourg funds, Japanese investment trust management funds or Delaware business trusts. We also may allocate seed capital to investments in private equity funds. In regard to our seed capital investments, the amounts above reflect those funds in which we are not the primary beneficiary of a VIE or hold a controlling financial interest in a VOE. See Note 14, Consolidated Company-Sponsored Investment Funds, for a description of the seed capital investments that we consolidate. As of March 31, 2021 and December 31, 2020, our total seed capital investments were $327.1 million and $310.3 million, respectively. Seed capital investments in unconsolidated company-sponsored investment funds are valued using published net asset values or non-published net asset values if they are not listed on an active exchange but have net asset values that are comparable to funds with published net asset values and have no redemption restrictions.

In addition, we also have long positions in corporate equities and long exchange-traded options traded through our options desk.

The portion of unrealized gains (losses) related to equity securities, as defined by ASC 321-10, held as of March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Net gains (losses) recognized during the period	$	4,887	$	(21,986)
Less: net gains (losses) recognized during the period on equity securities sold during the period	4,565		(1,395)
Unrealized gains (losses) recognized during the period on equity securities held	$	322	$	(20,591)

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Derivative Instruments

3 Months Ended

Mar. 31, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Instruments

Derivative Instruments

See Note 14, Consolidated Company-Sponsored Investment Funds, for disclosure of derivative instruments held by our consolidated company-sponsored investment funds.

We enter into various futures, forwards, options and swaps to economically hedge certain seed capital investments.  Also, we have currency forwards that help us to economically hedge certain balance sheet exposures. In addition, our options desk trades long and short exchange-traded equity options. We do not hold any derivatives designated in a formal hedge relationship under ASC 815-10, Derivatives and Hedging.

The notional value and fair value as of March 31, 2021 and December 31, 2020 for derivative instruments (excluding derivative instruments relating to our options desk trading activities discussed below) not designated as hedging instruments were as follows:

			Fair Value
	Notional Value		Derivative Assets		Derivative Liabilities
	(in thousands)
March 31, 2021:
Exchange-traded futures	$	146,700	$	1,962	$	678
Currency forwards	51,703		8,548		8,042
Interest rate swaps	60,997		1,670		2,425
Credit default swaps	178,035		11,369		9,430
Total return swaps	53,817		31		800
Option swaps	50,000		—		329
Total derivatives	$	541,252	$	23,580	$	21,704
December 31, 2020:
Exchange-traded futures	$	142,886	$	118	$	1,834
Currency forwards	63,906		8,576		8,451
Interest rate swaps	60,997		2,043		2,955
Credit default swaps	167,649		10,910		13,304
Total return swaps	52,061		94		1,847
Option swaps	2,486		—		2,146
Total derivatives	$	489,985	$	21,741	$	30,537

As of March 31, 2021 and December 31, 2020, the derivative assets and liabilities are included in both receivables and payables to brokers and dealers on our condensed consolidated statements of financial condition.

The gains and losses for derivative instruments (excluding our options desk trading activities discussed below) for the three months ended March 31, 2021 and 2020 recognized in investment gains (losses) in the condensed consolidated statements of income were as follows:

	Three Months Ended March 31,
	2021		2020
Exchange-traded futures	$	1,135	$	1,006
Currency forwards	1,181		658
Interest rate swaps	88		(612)
Credit default swaps	(522)		12,101
Total return swaps	(907)		15,115
Option swaps	1,361		1,298
Net gains on derivative instruments	$	2,336	$	29,566

We may be exposed to credit-related losses in the event of non-performance by counterparties to derivative financial instruments. We minimize our counterparty exposure through a credit review and approval process. In addition, we have executed various collateral arrangements with counterparties to the over-the-counter derivative transactions that require both pledging and accepting collateral in the form of cash. As of March 31, 2021 and December 31, 2020, we held $3.9 million and $0.4 million, respectively, of cash collateral payable to trade counterparties. This obligation to return cash is reported in payables to brokers and dealers in our condensed consolidated statements of financial condition.

Although notional amount is the most commonly used measure of volume in the derivatives market, it is not used as a measure of credit risk. Generally, the current credit exposure of our derivative contracts is limited to the net positive estimated fair value of derivative contracts at the reporting date after taking into consideration the existence of netting

agreements and any collateral received. A derivative with positive value (a derivative asset) indicates existence of credit risk because the counterparty would owe us if the contract were closed. Alternatively, a derivative contract with negative value (a derivative liability) indicates we would owe money to the counterparty if the contract were closed. Generally, if there is more than one derivative transaction with a single counterparty, a master netting arrangement exists with respect to derivative transactions with that counterparty to provide for aggregate net settlement.

Certain of our standardized contracts for over-the-counter derivative transactions (“ISDA Master Agreements”) contain credit risk related contingent provisions pertaining to each counterparty’s credit rating. In some ISDA Master Agreements, if the counterparty’s credit rating, or in some agreements, our assets under management (“AUM”), falls below a specified threshold, either a default or a termination event permitting us or the counterparty to terminate the ISDA Master Agreement would be triggered. In all agreements that provide for collateralization, various levels of collateralization of net liability positions are applicable, depending on the credit rating of the counterparty. As of March 31, 2021 and December 31, 2020, we delivered $3.3 million and $6.4 million, respectively, of cash collateral into brokerage accounts. We report this cash collateral in cash and cash equivalents in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, we held $4.2 million and $7.5 million, respectively, of long exchange-traded equity options, which are included in other investments on our condensed consolidated statements of financial condition. In addition, as of March 31, 2021 and December 31, 2020, we held $1.3 million and $12.5 million, respectively, of short exchange-traded equity options, which are included in securities sold not yet purchased on our condensed consolidated statements of financial condition. Our options desk provides our clients with equity derivative strategies and execution for exchange-traded options on single stocks, exchange-traded funds and indices. While predominately agency-based, the options desk may commit capital to facilitate a client’s transaction. Our options desk hedges the risks associated with this activity by taking offsetting positions in equities. For the three months ended March 31, 2021 and 2020, we recognized gains of $4.8 million and $18.4 million, respectively, on equity options activity. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income.

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Offsetting Assets and Liabilities

3 Months Ended

Mar. 31, 2021

Offsetting [Abstract]

Offsetting Assets and Liabilities

Offsetting Assets and Liabilities

See Note 14, Consolidated Company-Sponsored Investment Funds, for disclosure of offsetting assets and liabilities of our consolidated company-sponsored investment funds.

Offsetting of assets as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Securities borrowed	$	24,294	$	—	$	24,294	$	(19,526)	$	—	$	4,768
Derivatives	$	23,580	$	—	$	23,580	$	—	$	(3,890)	$	19,690
Long exchange-traded options	$	4,156	$	—	$	4,156	$	—	$	—	$	4,156
December 31, 2020:
Securities borrowed	$	7,808	$	—	$	7,808	$	(7,344)	$	—	$	464
Derivatives	$	21,741	$	—	$	21,741	$	—	$	(380)	$	21,361
Long exchange-traded options	$	7,527	$	—	$	7,527	$	—	$	—	$	7,527

Offsetting of liabilities as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives	$	21,704	$	—	$	21,704	$	—	$	(3,338)	$	18,366
Short exchange-traded options	$	1,270	$	—	$	1,270	$	—	$	—	$	1,270
December 31, 2020:
Derivatives	$	30,537	$	—	$	30,537	$	—	$	(6,374)	$	24,163
Short exchange-traded options	$	12,486	$	—	$	12,486	$	—	$	—	$	12,486

Cash collateral, whether pledged or received on derivative instruments, is not considered material and, accordingly, is not disclosed by counterparty.

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Fair Value

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Fair Value

Fair Value

See Note 14, Consolidated Company-Sponsored Investment Funds, for disclosure of fair value of our consolidated company-sponsored investment funds.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability (i.e., the “exit price”) in an orderly transaction between market participants at the measurement date. The three broad levels of fair value hierarchy are as follows:

•    Level 1 – Quoted prices in active markets are available for identical assets or liabilities as of the reported date.

•    Level 2 – Quoted prices in markets that are not active or other pricing inputs that are either directly or indirectly observable as of the reported date.

•    Level 3 –  Prices or valuation techniques that are both significant to the fair value measurement and unobservable as of the reported date. These financial instruments do not have two-way markets and are measured using management’s best estimate of fair value, where the inputs into the determination of fair value require significant management judgment or estimation.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Valuation of our financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
March 31, 2021:
Money markets	$	163,018	$	—	$	—	$	—	$	—	$	163,018
Securities segregated (U.S. Treasury Bills)	—		1,412,873		—		—		—		1,412,873
Derivatives	1,962		21,618		—		—		—		23,580
Investments:
Equity securities	96,524		17,548		124		159		—		114,355
Long exchange-traded options	4,156		—		—		—		—		4,156
Limited partnership hedge funds(2)	—		—		—		—		47,448		47,448
Time deposits(3)	—		—		—		—		18,233		18,233
Other investments	7,443		—		—		—		8,023		15,466
Total investments	108,123		17,548		124		159		73,704		199,658
Total assets measured at fair value	$	273,103	$	1,452,039	$	124	$	159	$	73,704	$	1,799,129
Securities sold not yet purchased:
Short equities – corporate	$	7,037	$	—	$	—	$	—	$	—	$	7,037
Short exchange-traded options	1,270		—		—		—		—		1,270
Derivatives	678		21,026		—		—		—		21,704
Contingent payment arrangements	—		—		36,073		—		—		36,073
Total liabilities measured at fair value	$	8,985	$	21,026	$	36,073	$	—	$	—	$	66,084

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
December 31, 2020:
Money markets	$	130,675	$	—	$	—	$	—	$	—	$	130,675
Securities segregated (U.S. Treasury Bills)	—		1,752,906		—		—		—		1,752,906
Derivatives	118		21,623		—		—		—		21,741
Investments:
Equity securities	147,705		17,565		125		161		—		165,556
Long exchange-traded options	7,527		—		—		—		—		7,527
Limited partnership hedge funds(2)	—		—		—		—		42,408		42,408
Time deposits(3)	—		—		—		—		18,602		18,602
Other investments	7,011		—		—		—		12,271		19,282
Total investments	162,243		17,565		125		161		73,281		253,375
Total assets measured at fair value	$	293,036	$	1,792,094	$	125	$	161	$	73,281	$	2,158,697
Securities sold not yet purchased:
Short equities – corporate	$	5,305	$	—	$	—	$	—	$	—	$	5,305
Short exchange-traded options	12,486		—		—		—		—		12,486
Derivatives	1,834		28,703		—		—		—		30,537
Contingent payment arrangements	—		—		27,750		—		—		27,750
Total liabilities measured at fair value	$	19,625	$	28,703	$	27,750	$	—	$	—	$	76,078

(1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient.

(2) Investments in equity method investees that are not measured at fair value in accordance with GAAP.

(3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP.

Other investments include (i) an investment in a software publishing company that does not have a readily available fair value ($2.2 million and $2.1 million as of March 31, 2021 and December 31, 2020, respectively), (ii) investment in a start-up company that does not have a readily available fair value (this investment was $0.3 million as of both March 31, 2021 and December 31, 2020), (iii) investments in equity method investees that are not measured at fair value in accordance with GAAP ($2.3 million and $6.5 million as of March 31, 2021 and December 31, 2020, respectively), and (iv) broker dealer exchange memberships that are not measured at fair value in accordance with GAAP ($3.3 million as of both March 31, 2021 and December 31, 2020).

We provide below a description of the fair value methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy:

•    Money markets: We invest excess cash in various money market funds that are valued based on quoted prices in active markets; these are included in Level 1 of the valuation hierarchy.

•    Treasury Bills: We hold U.S. Treasury Bills, which are primarily segregated in a special reserve bank custody account as required by Rule 15c3-3 of the Exchange Act. These securities are valued based on quoted yields in secondary markets and are included in Level 2 of the valuation hierarchy.

•    Equity securities: Our equity securities consist principally of company-sponsored mutual funds with NAVs and various separately-managed portfolios consisting primarily of equity and fixed income mutual funds with quoted prices in active markets, which are included in Level 1 of the valuation hierarchy. In addition, some securities are valued based on observable inputs from recognized pricing vendors, which are included in Level 2 of the valuation hierarchy.

•    Derivatives: We hold exchange-traded futures with counterparties that are included in Level 1 of the valuation hierarchy. In addition, we also hold currency forward contracts, interest rate swaps, credit default swaps, option swaps

and total return swaps with counterparties that are valued based on observable inputs from recognized pricing vendors, which are included in Level 2 of the valuation hierarchy.

•    Options: We hold long exchange-traded options that are included in Level 1 of the valuation hierarchy.

•    Securities sold not yet purchased: Securities sold not yet purchased, primarily reflecting short positions in equities and exchange-traded options, are included in Level 1 of the valuation hierarchy.

•    Contingent payment arrangements: Contingent payment arrangements relate to contingent payment liabilities associated with various acquisitions. At each reporting date, we estimate the fair values of the contingent consideration expected to be paid based upon probability-weighted AUM and revenue projections, using unobservable market data inputs, which are included in Level 3 of the valuation hierarchy.

During the three months ended March 31, 2021 there were no transfers between Level 2 and Level 3 securities.

The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as equity securities, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	125	$	119
Purchases	—		—
Sales	—		—
Realized gains (losses), net	—		—
Unrealized gains (losses), net	(1)		(1)
Balance as of end of period	$	124	$	118

Realized and unrealized gains and losses on Level 3 financial instruments are recorded in investment gains and losses in the condensed consolidated statements of income.

As part of acquisitions made by the Company, we may enter into contingent consideration arrangements as part of the purchase price. The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as contingent payment arrangements, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	27,750	$	22,911
Addition	7,526		—
Accretion	797		793
Payments	—		—
Balance as of end of period	$	36,073	$	23,704

The liabilities were valued using expected revenue growth rates and discount rates. As of March 31, 2021 the expected revenue growth rates range from 2.0% to 135.6%, with a weighted average of 9.0%, calculated using cumulative revenues and range of revenue growth rates (excluding revenue growth from additional AUM contributed from existing clients). The discount rates ranged from 1.9% to 20.0%, with a weighted average of 10.8%, calculated using total contingent liabilities and range of discount rates. As of March 31, 2020 the expected revenue growth rates ranged from 0.7% to 50.0%, with a weighted average of 4.9%, calculated using cumulative revenues and a range of revenue growth rates. The discount rates ranged from 3.0% to 10.0%, with a weighted average of 9.3%, calculated using total contingent liabilities and range of discount rates.

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis We did not have any material assets or liabilities that were measured at fair value for impairment on a nonrecurring basis during the three months ended March 31, 2021 or during the year ended December 31, 2020.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

Legal Proceedings

With respect to all significant litigation matters, we consider the likelihood of a negative outcome. If we determine the likelihood of a negative outcome is probable and the amount of the loss can be reasonably estimated, we record an estimated loss for the expected outcome of the litigation. If the likelihood of a negative outcome is reasonably possible and we can determine an estimate of the possible loss or range of loss in excess of amounts already accrued, if any, we disclose that fact together with the estimate of the possible loss or range of loss. However, it is often difficult to predict the outcome or estimate a possible loss or range of loss because litigation is subject to inherent uncertainties, particularly when plaintiffs allege substantial or indeterminate damages. Such is also the case when the litigation is in its early stages or when the litigation is highly complex or broad in scope. In these cases, we disclose that we are unable to predict the outcome or estimate a possible loss or range of loss.

AB may be involved in various matters, including regulatory inquiries, administrative proceedings and litigation, some of which may allege significant damages. It is reasonably possible that we could incur losses pertaining to these matters, but we cannot currently estimate any such losses.

Management, after consultation with legal counsel, currently believes that the outcome of any individual matter that is pending or threatened, or all of them combined, will not have a material adverse effect on our results of operations, financial condition or liquidity. However, any inquiry, proceeding or litigation has an element of uncertainty; management cannot determine whether further developments relating to any individual matter that is pending or threatened, or all of them combined, will have a material adverse effect on our results of operation, financial condition or liquidity in any future reporting period.

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Leases

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Leases

Leases

We lease office space, furniture and office equipment under various operating and financing leases. Our current leases have remaining lease terms of one year to 15 years, some of which include options to extend the leases for up to five years, and some of which include options to terminate the leases within one year. Since 2010, we have sub-leased over one million square feet of office space.

Leases included in the condensed consolidated statement of financial condition as of March 31, 2021 and December 31, 2020 were as follows:

	Classification	March 31, 2021		December 31, 2020
		(in thousands)
Operating Leases
Operating lease right-of-use assets	Right-of-use assets	$	407,608	$	416,007
Operating lease liabilities	Lease liabilities	490,121		503,174
Finance Leases
Property and equipment, gross	Right-of-use assets	7,329		5,167
Amortization of right-of-use assets	Right-of-use assets	(2,098)		(2,719)
Property and equipment, net		5,231		2,448
Finance lease liabilities	Lease liabilities	5,235		2,375

The components of lease expense included in the condensed consolidated statement of income as of March 31, 2021 and March 31, 2020 were as follows:

			Three Months Ended March 31,
	Classification		2021		2020
		(in thousands)
Operating lease cost	General and administrative		$	24,418	$	23,004
Financing lease cost:
Amortization of right-of-use assets	General and administrative		501		477
Interest on lease liabilities	Interest expense		22		26
Total finance lease cost			523		503
Variable lease cost (1)	General and administrative		9,546		9,477
Sublease income	General and administrative		(9,807)		(9,615)
Net lease cost			$	24,680	$	23,369

(1) Variable lease expense includes operating expenses, real estate taxes and employee parking.

The sub-lease income represents all revenues received from sub-tenants. It is primarily fixed base rental payments combined with variable reimbursements such as operating expenses, real estate taxes and employee parking. We derive most of our sub-tenant income from our New York metro sub-tenant agreements. Sub-tenant income related to base rent is recorded on a straight-line basis. 

Maturities of lease liabilities were as follows:

	Operating Leases		Financing Leases		Total
Year ending December 31,	(in thousands)
2021 (excluding the three months ended March 31, 2021)	$	82,594	$	1,363	$	83,957
2022	100,370		1,551		101,921
2023	93,299		1,289		94,588
2024	90,283		722		91,005
2025	25,430		426		25,856
Thereafter	149,885		24		149,909
Total lease payments	541,861		5,375		547,236
Less interest	(51,740)		(140)
Present value of lease liabilities	$	490,121	$	5,235

We have signed a lease which commences in 2024, relating to approximately 166,000 square feet of space in New York City. Our estimated total base rent obligation (excluding taxes, operating expenses and utilities) over the 20-year lease term is approximately $393.0 million.

Lease term and discount rate:
Weighted average remaining lease term (years):
Operating leases	7.23
Finance leases	3.52
Weighted average discount rate:
Operating leases	3.07	%
Finance leases	1.75	%

Supplemental cash flow information related to leases was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$	27,970	$	29,698
Operating cash flows used for financing leases	22		26
Financing cash flows from finance leases	424		504
Right-of-use assets obtained in exchange for lease obligations(1):
Operating leases (2)	12,161		—
Finance leases	3,283		1,695

(1) Represents non-cash activity and, accordingly, is not reflected in the consolidated statements of cash flows.

(2) Represents net non-cash activity of new lease obligations, extensions and reductions of existing lease obligations.

Leases

Leases

We lease office space, furniture and office equipment under various operating and financing leases. Our current leases have remaining lease terms of one year to 15 years, some of which include options to extend the leases for up to five years, and some of which include options to terminate the leases within one year. Since 2010, we have sub-leased over one million square feet of office space.

Leases included in the condensed consolidated statement of financial condition as of March 31, 2021 and December 31, 2020 were as follows:

	Classification	March 31, 2021		December 31, 2020
		(in thousands)
Operating Leases
Operating lease right-of-use assets	Right-of-use assets	$	407,608	$	416,007
Operating lease liabilities	Lease liabilities	490,121		503,174
Finance Leases
Property and equipment, gross	Right-of-use assets	7,329		5,167
Amortization of right-of-use assets	Right-of-use assets	(2,098)		(2,719)
Property and equipment, net		5,231		2,448
Finance lease liabilities	Lease liabilities	5,235		2,375

The components of lease expense included in the condensed consolidated statement of income as of March 31, 2021 and March 31, 2020 were as follows:

			Three Months Ended March 31,
	Classification		2021		2020
		(in thousands)
Operating lease cost	General and administrative		$	24,418	$	23,004
Financing lease cost:
Amortization of right-of-use assets	General and administrative		501		477
Interest on lease liabilities	Interest expense		22		26
Total finance lease cost			523		503
Variable lease cost (1)	General and administrative		9,546		9,477
Sublease income	General and administrative		(9,807)		(9,615)
Net lease cost			$	24,680	$	23,369

(1) Variable lease expense includes operating expenses, real estate taxes and employee parking.

The sub-lease income represents all revenues received from sub-tenants. It is primarily fixed base rental payments combined with variable reimbursements such as operating expenses, real estate taxes and employee parking. We derive most of our sub-tenant income from our New York metro sub-tenant agreements. Sub-tenant income related to base rent is recorded on a straight-line basis. 

Maturities of lease liabilities were as follows:

	Operating Leases		Financing Leases		Total
Year ending December 31,	(in thousands)
2021 (excluding the three months ended March 31, 2021)	$	82,594	$	1,363	$	83,957
2022	100,370		1,551		101,921
2023	93,299		1,289		94,588
2024	90,283		722		91,005
2025	25,430		426		25,856
Thereafter	149,885		24		149,909
Total lease payments	541,861		5,375		547,236
Less interest	(51,740)		(140)
Present value of lease liabilities	$	490,121	$	5,235

We have signed a lease which commences in 2024, relating to approximately 166,000 square feet of space in New York City. Our estimated total base rent obligation (excluding taxes, operating expenses and utilities) over the 20-year lease term is approximately $393.0 million.

Lease term and discount rate:
Weighted average remaining lease term (years):
Operating leases	7.23
Finance leases	3.52
Weighted average discount rate:
Operating leases	3.07	%
Finance leases	1.75	%

Supplemental cash flow information related to leases was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$	27,970	$	29,698
Operating cash flows used for financing leases	22		26
Financing cash flows from finance leases	424		504
Right-of-use assets obtained in exchange for lease obligations(1):
Operating leases (2)	12,161		—
Finance leases	3,283		1,695

(1) Represents non-cash activity and, accordingly, is not reflected in the consolidated statements of cash flows.

(2) Represents net non-cash activity of new lease obligations, extensions and reductions of existing lease obligations.

Leases

Leases

We lease office space, furniture and office equipment under various operating and financing leases. Our current leases have remaining lease terms of one year to 15 years, some of which include options to extend the leases for up to five years, and some of which include options to terminate the leases within one year. Since 2010, we have sub-leased over one million square feet of office space.

Leases included in the condensed consolidated statement of financial condition as of March 31, 2021 and December 31, 2020 were as follows:

	Classification	March 31, 2021		December 31, 2020
		(in thousands)
Operating Leases
Operating lease right-of-use assets	Right-of-use assets	$	407,608	$	416,007
Operating lease liabilities	Lease liabilities	490,121		503,174
Finance Leases
Property and equipment, gross	Right-of-use assets	7,329		5,167
Amortization of right-of-use assets	Right-of-use assets	(2,098)		(2,719)
Property and equipment, net		5,231		2,448
Finance lease liabilities	Lease liabilities	5,235		2,375

The components of lease expense included in the condensed consolidated statement of income as of March 31, 2021 and March 31, 2020 were as follows:

			Three Months Ended March 31,
	Classification		2021		2020
		(in thousands)
Operating lease cost	General and administrative		$	24,418	$	23,004
Financing lease cost:
Amortization of right-of-use assets	General and administrative		501		477
Interest on lease liabilities	Interest expense		22		26
Total finance lease cost			523		503
Variable lease cost (1)	General and administrative		9,546		9,477
Sublease income	General and administrative		(9,807)		(9,615)
Net lease cost			$	24,680	$	23,369

(1) Variable lease expense includes operating expenses, real estate taxes and employee parking.

The sub-lease income represents all revenues received from sub-tenants. It is primarily fixed base rental payments combined with variable reimbursements such as operating expenses, real estate taxes and employee parking. We derive most of our sub-tenant income from our New York metro sub-tenant agreements. Sub-tenant income related to base rent is recorded on a straight-line basis. 

Maturities of lease liabilities were as follows:

	Operating Leases		Financing Leases		Total
Year ending December 31,	(in thousands)
2021 (excluding the three months ended March 31, 2021)	$	82,594	$	1,363	$	83,957
2022	100,370		1,551		101,921
2023	93,299		1,289		94,588
2024	90,283		722		91,005
2025	25,430		426		25,856
Thereafter	149,885		24		149,909
Total lease payments	541,861		5,375		547,236
Less interest	(51,740)		(140)
Present value of lease liabilities	$	490,121	$	5,235

We have signed a lease which commences in 2024, relating to approximately 166,000 square feet of space in New York City. Our estimated total base rent obligation (excluding taxes, operating expenses and utilities) over the 20-year lease term is approximately $393.0 million.

Lease term and discount rate:
Weighted average remaining lease term (years):
Operating leases	7.23
Finance leases	3.52
Weighted average discount rate:
Operating leases	3.07	%
Finance leases	1.75	%

Supplemental cash flow information related to leases was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$	27,970	$	29,698
Operating cash flows used for financing leases	22		26
Financing cash flows from finance leases	424		504
Right-of-use assets obtained in exchange for lease obligations(1):
Operating leases (2)	12,161		—
Finance leases	3,283		1,695

(1) Represents non-cash activity and, accordingly, is not reflected in the consolidated statements of cash flows.

(2) Represents net non-cash activity of new lease obligations, extensions and reductions of existing lease obligations.

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Consolidated Company-Sponsored Investment Funds

3 Months Ended

Mar. 31, 2021

Consolidated Company-Sponsored Investment Funds [Abstract]

Consolidated Company-Sponsored Investment Funds

Consolidated Company-Sponsored Investment Funds

We regularly provide seed capital to new company-sponsored investment funds. As such, we may consolidate or de-consolidate a variety of company-sponsored investment funds each quarter. Due to the similarity of risks related to our involvement with each company-sponsored investment fund, disclosures required under the VIE model are aggregated, such as disclosures regarding the carrying amount and classification of assets.

We are not required to provide financial support to company-sponsored investment funds, and only the assets of such funds are available to settle each fund's own liabilities. Our exposure to loss regarding consolidated company-sponsored investment funds is limited to our investment in, and our management fee earned from, such funds. Equity and debt holders of such funds have no recourse to AB’s assets or to the general credit of AB.

The balances of consolidated VIEs and VOEs included in our condensed consolidated statements of financial condition were as follows:

	March 31, 2021						December 31, 2020
	(in thousands)
	VIEs		VOEs		Total		VIEs		VOEs		Total
Cash and cash equivalents	$	35,084	$	3,477	$	38,561	$	36,370	$	136	$	36,506
Investments	247,581		60,462		308,043		242,541		60,041		302,582
Other assets	6,869		13,605		20,474		4,859		7,385		12,244
Total assets	$	289,534	$	77,544	$	367,078	$	283,770	$	67,562	$	351,332
Liabilities	$	13,922	$	28,609	$	42,531	$	7,741	$	22,879	$	30,620
Redeemable non-controlling interest	64,313		24,254		88,567		82,753		19,606		102,359
Partners' capital attributable to AB Unitholders	211,299		24,681		235,980		193,276		25,077		218,353
Total liabilities, redeemable non-controlling interest and partners' capital	$	289,534	$	77,544	$	367,078	$	283,770	$	67,562	$	351,332

During the first quarter of 2021, we deconsolidated one fund in which we had a seed investment of approximately $4.1 million due to no longer having a controlling financial interest.

Fair Value

Cash and cash equivalents include cash on hand, demand deposits, overnight commercial paper and highly liquid investments with original maturities of three months or less. Due to the short-term nature of these instruments, the recorded value has been determined to approximate fair value.

Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		Total
March 31, 2021:
Investments - VIEs	$	51,869	$	195,206	$	506	$	247,581
Investments - VOEs	301		59,950		211		60,462
Derivatives - VIEs	515		2,389		—		2,904
Derivatives - VOEs	—		2,395		—		2,395
Total assets measured at fair value	$	52,685	$	259,940	$	717	$	313,342
Derivatives - VIEs	7,362		4,822		—		12,184
Derivatives - VOEs	7,071		686		—		7,757
Total liabilities measured at fair value	$	14,433	$	5,508	$	—	$	19,941
December 31, 2020:
Investments - VIEs	$	73,909	$	168,114	$	518	$	242,541
Investments - VOEs	—		59,940		101		60,041
Derivatives - VIEs	442		2,782		—		3,224
Derivatives - VOEs	—		464		—		464
Total assets measured at fair value	$	74,351	$	231,300	$	619	$	306,270
Derivatives - VIEs	$	1,649	$	5,244	$	—	$	6,893
Derivatives - VOEs	—		664		—		664
Total liabilities measured at fair value	$	1,649	$	5,908	$	—	$	7,557

See Note 11 for a description of the fair value methodologies used for instruments measured at fair value, as well as the general classification of such instruments pursuant to the valuation hierarchy.

The change in carrying value associated with Level 3 financial instruments carried at fair value within consolidated company-sponsored investment funds was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	619	$	854
Transfers (out) in	(10)		231
Purchases	119		33
Sales	(3)		(362)
Realized gains (losses), net	3		—
Unrealized gains (losses), net	(11)		(224)
Accrued discounts	—		2
Balance as of end of period	$	717	$	534

The Level 3 securities primarily consist of corporate bonds that are vendor priced with no ratings available, bank loans, non-agency collateralized mortgage obligations and asset-backed securities.

Transfers into and out of all levels of the fair value hierarchy are reflected at end-of-period fair values. Realized and unrealized gains and losses on Level 3 financial instruments are recorded in investment gains and losses in the condensed consolidated statements of income.

Derivative Instruments

As of March 31, 2021 and December 31, 2020, the VIEs held $9.3 million and $3.7 million (net), respectively, of futures, forwards and swaps within their portfolios. For the three months ended March 31, 2021 and 2020, we recognized $1.1 million and $1.7 million of losses, respectively, on these derivatives. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income.

As of March 31, 2021 and December 31, 2020, the VIEs held $0.6 million and $0.5 million, respectively, of cash collateral payable to trade counterparties. This obligation to return cash is reported in the liabilities of consolidated company-sponsored investment funds in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, the VIEs delivered $4.9 million and $4.2 million, respectively, of cash collateral into brokerage accounts. The VIEs report this cash collateral in the consolidated company-sponsored investment funds cash and cash equivalents in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, the VOEs held $5.4 million and $0.2 million (net), respectively, of futures, forwards, options and swaps within their portfolios. For the three months ended March 31, 2021 and 2020, we recognized $0.9 million and $0.1 million of gains, respectively, on these derivatives. These gains and losses are recognized in investment gains (losses) in the condensed consolidated statements of income.

As of both March 31, 2021 and December 31, 2020, the VOEs held no cash collateral payable to trade counterparties. This obligation to return cash is reported in the liabilities of consolidated company-sponsored investment funds in our condensed consolidated statements of financial condition.

As of March 31, 2021 and December 31, 2020, the VOEs delivered zero and $0.1 million, respectively, of cash collateral in brokerage accounts. The VOEs report this cash collateral in the consolidated company-sponsored investment funds cash and cash equivalents in our condensed consolidated statements of financial condition.

Offsetting Assets and Liabilities

Offsetting of derivative assets of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	2,904	$	—	$	2,904	$	—	$	(551)	$	2,353
Derivatives - VOEs	$	2,395	$	—	$	2,395	$	—	$	—	$	2,395
December 31, 2020:
Derivatives - VIEs	$	3,224	$	—	$	3,224	$	—	$	(513)	$	2,711
Derivatives - VOEs	$	464	$	—	$	464	$	—	$	—	$	464

Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	12,184	$	—	$	12,184	$	—	$	(4,929)	$	7,255
Derivatives - VOEs	$	7,757	$	—	$	7,757	$	—	$	—	$	7,757
December 31, 2020:
Derivatives - VIEs	$	6,893	$	—	$	6,893	$	—	$	(4,201)	$	2,692
Derivatives - VOEs	$	664	$	—	$	664	$	—	$	(138)	$	526

Cash collateral, whether pledged or received on derivative instruments, is not considered material and, accordingly, is not disclosed by counterparty.

Non-Consolidated VIEs

As of March 31, 2021, the net assets of company-sponsored investment products that are non-consolidated VIEs are approximately $70.9 billion, and our maximum risk of loss is our investment of $7.2 million in these VIEs and our advisory fee receivables from these VIEs is $76.1 million.

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Units Outstanding

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Units Outstanding

Units Outstanding

Changes in AB Units outstanding during the three-month period ended March 31, 2021 were as follows:

Outstanding as of December 31, 2020	270,509,658
Options exercised	79,108
Units issued	2,847,552
Units retired(1)	(761,153)
Outstanding as of March 31, 2021	272,675,165

(1) During the three-months ended March 31, 2021, we purchased 1,400 AB Units in private transactions and retired them.

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Debt

3 Months Ended

Mar. 31, 2021

Debt Disclosure [Abstract]

Debt

Debt

AB has an $800.0 million committed, unsecured senior revolving credit facility (the “Credit Facility”) with a group of commercial banks and other lenders, which matures on September 27, 2023. The Credit Facility provides for possible increases in the principal amount by up to an aggregate incremental amount of $200.0 million; any such increase is subject to the consent of the affected lenders. The Credit Facility is available for AB and Sanford C. Bernstein & Co., LLC ("SCB LLC") business purposes, including the support of AB’s commercial paper program. Both AB and SCB LLC can draw directly under the Credit Facility, and management may draw on the Credit Facility from time to time. AB has agreed to guarantee the obligations of SCB LLC under the Credit Facility.

The Credit Facility contains affirmative, negative and financial covenants, which are customary for facilities of this type, including restrictions on dispositions of assets, restrictions on liens, a minimum interest coverage ratio and a maximum leverage ratio. As of March 31, 2021, we were in compliance with these covenants. The Credit Facility also includes customary events of default (with customary grace periods, as applicable), including provisions under which, upon the occurrence of an event of default, all outstanding loans may be accelerated and/or lender’s commitments may be terminated. Also, under such provisions, upon the occurrence of certain insolvency- or bankruptcy-related events of default, all amounts payable under the Credit Facility would automatically become immediately due and payable, and the lender’s commitments automatically would terminate.

Amounts under the Credit Facility may be borrowed, repaid and re-borrowed by us from time to time until the maturity of the facility. Voluntary prepayments and commitment reductions requested by us are permitted at any time without a fee (other than customary breakage costs relating to the prepayment of any drawn loans) upon proper notice and subject to a minimum dollar requirement. Borrowings under the Credit Facility bear interest at a rate per annum, which will be, at our option, a rate equal to an applicable margin, which is subject to adjustment based on the credit ratings of AB, plus one of the following indices: London Interbank Offered Rate; a floating base rate; or the Federal Funds rate.

As of March 31, 2021 and December 31, 2020, we had no amounts outstanding under the Credit Facility. During the first three months of 2021 and the full year 2020, we did not draw upon the Credit Facility.

AB also has a $900.0 million committed, unsecured senior credit facility (“EQH Facility”) with EQH. The EQH Facility matures on November 4, 2024 and is available for AB's general business purposes. Borrowings under the EQH Facility generally bear interest at a rate per annum based on prevailing overnight commercial paper rates.

The EQH Facility contains affirmative, negative and financial covenants which are substantially similar to those in AB’s committed bank facilities. The EQH Facility also includes customary events of default substantially similar to those in AB’s committed bank facilities, including provisions under which, upon the occurrence of an event of default, all outstanding loans may be accelerated and/or the lender’s commitment may be terminated.

Amounts under the EQH Facility may be borrowed, repaid and re-borrowed by us from time to time until the maturity of the facility. AB or EQH may reduce or terminate the commitment at any time without penalty upon proper notice. EQH also may terminate the facility immediately upon a change of control of our general partner.

As of March 31, 2021 and December 31, 2020, AB had $625.0 million and $675.0 million outstanding under the EQH Facility, in each case with an interest rate of approximately 0.2%. Average daily borrowings on the EQH Facility for the first three months of 2021 and the full year 2020 were $622.3 million and $470.8 million, respectively, with weighted average interest rates of approximately 0.2% and 0.5%, respectively.

In addition to the EQH Facility, on September 1, 2020, AB established a new $300.0 million uncommitted, unsecured senior credit facility (“EQH Uncommitted Facility”) with EQH. The EQH Uncommitted Facility matures on September 1, 2024 and is available for AB's general business purposes. Borrowings under the EQH Unsecured Facility generally bear interest at a rate per annum based on prevailing overnight commercial paper rates. The EQH Uncommitted Facility contains affirmative, negative and financial covenants which are substantially similar to those in the EQH Facility. As of March 31, 2021 and December 31, 2020, we had no amounts outstanding on the EQH Uncommitted Facility. During the first three months of 2021 and the full year 2020, we did not draw upon the EQH Uncommitted Facility.

As of March 31, 2021 and December 31, 2020, we had no commercial paper outstanding. The commercial paper is short term in nature, and as such, recorded value is estimated to approximate fair value (and considered a Level 2 security in the fair value hierarchy). Average daily borrowings of commercial paper during the first three months of 2021 and full year 2020 were $120.3 million and $83.2 million, respectively, with weighted average interest rates of approximately 0.2% and 0.4%, respectively.

AB has a $200.0 million committed, unsecured senior revolving credit facility (the "Revolver") with a leading international bank, which matures on November 16, 2021. The Revolver is available for AB's and SCB LLC's business purposes, including the provision of additional liquidity to meet funding requirements primarily related to SCB LLC's operations. Both AB and SCB LLC can draw directly under the Revolver and management expects to draw on the Revolver from time to time. AB has agreed to guarantee the obligations of SCB LLC under the Revolver. The Revolver contains affirmative, negative and financial covenants that are identical to those of the Credit Facility. Borrowings under the Revolver bear interest at a rate per annum, which will be, at our option, a rate equal to an applicable margin, which is subject to adjustment based on the credit ratings of AB, plus one of the following indices: London Interbank Offered Rate; a floating base rate; or the Federal Funds rate. As of both March 31, 2021 and December 31, 2020, we had no amounts outstanding under the Revolver. Average daily borrowings under the Revolver during the first three months of 2021 and full year 2020 were $26.1 million and $16.5 million, respectively, with weighted average interest rates of approximately 1.1% and 1.6%, respectively.

In addition, SCB LLC currently has three uncommitted lines of credit with three financial institutions. Two of these lines of credit permit us to borrow up to an aggregate of approximately $165.0 million, with AB named as an additional borrower, while the other line has no stated limit. As of March 31, 2021 and December 31, 2020, SCB LLC had no outstanding

balance on these lines of credit. We did not draw on these lines of credit during the first three months of 2021. Average daily borrowings during the full year 2020 were $0.9 million with a weighted average interest rate of approximately 1.6%

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Non-controlling Interests

3 Months Ended

Mar. 31, 2021

Noncontrolling Interest [Abstract]

Non-controlling Interests

Non-controlling Interests

Non-controlling interest in net income for the three months ended March 31, 2021 and 2020 consisted of the following:

		Three Months Ended March 31,
		2021		2020
	(in thousands)
Redeemable non-controlling interests:
Consolidated company-sponsored investment funds		$	(292)	$	(25,571)
Total non-controlling interest in net income		$	(292)	$	(25,571)

Redeemable non-controlling interest as of March 31, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021		December 31, 2020
	(in thousands)
Consolidated company-sponsored investment funds	$	88,567	$	102,359
Total redeemable non-controlling interest	$	88,567	$	102,359

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Business Description Organization and Basis of Presentation (Policies)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation

Basis of Presentation The interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”). In the opinion of management, all adjustments, consisting only of normal recurring adjustments, necessary for a fair statement of the interim results, have been made. The preparation of the condensed consolidated financial statements requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the dates of the condensed consolidated financial statements and the reported amounts of revenues and expenses during the interim reporting periods. Actual results could differ from those estimates. The condensed consolidated statement of financial condition as of December 31, 2020 was derived from audited financial statements. Certain disclosures included in the annual financial statements have been condensed or omitted from these financial statements as they are not required for interim financial statements under principles generally accepted in the United States of America ("GAAP") and the rules of the Securities and Exchange Commission.

Principles of Consolidation

Principles of Consolidation The condensed consolidated financial statements include AB and its majority-owned and/or controlled subsidiaries, and the consolidated entities that are considered to be variable interest entities (“VIEs”) and voting interest entities (“VOEs”) in which AB has a controlling financial interest. Non-controlling interests on the condensed consolidated statements of financial condition include the portion of consolidated company-sponsored investment funds in which we do not have direct equity ownership. All significant inter-company transactions and balances among the consolidated entities have been eliminated.

Reclassifications

Reclassifications

During 2021, prior period amounts previously presented as net issuance (repayment) of commercial paper, proceeds (repayment) of EQH facility and proceeds (repayment) of bank loans are now combined and presented as net repayments (borrowings) of debt in the condensed consolidated statements of cash flows to conform to the current period's presentation.

Recently Adopted Accounting Pronouncements / Accounting Pronouncements Not Yet Adopted

Recently Adopted Accounting Pronouncements

In August 2018, the FASB issued ASU 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans - General (Topic 715-20). The amendment modifies the disclosure requirements for employers that sponsor defined benefit pension or other post-retirement plans. We adopted this standard prospectively on January 1, 2021. The adoption of this standard did not have a material impact on our financial condition or results of operations.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. The amendments simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify US GAAP for other areas of Topic 740 by clarifying and amending the existing guidance. We adopted this standard prospectively on January 1, 2021. The adoption of this standard did not have a material impact on our financial condition or results of operations.

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Business Description Organization and Basis of Presentation (Tables)

3 Months Ended

Mar. 31, 2021

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Ownership Structure of AB as a Percentage of General and Limited Partnership Interests

As of March 31, 2021, the ownership structure of AB, including limited partnership units outstanding as well as the general partner's 1% interest, was as follows:

EQH and its subsidiaries	62.8	%
AB Holding	36.5
Unaffiliated holders	0.7
	100.0	%

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Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Revenues

Revenues for the three months ended March 31, 2021 and 2020 consisted of the following:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Subject to contracts with customers:
Investment advisory and services fees
Base fees	$	687,691	$	613,587
Performance-based fees	15,775		8,138
Bernstein research services	119,021		129,223
Distribution revenues
All-in-management fees	85,182		86,357
12b-1 fees	20,034		19,453
Other	42,384		25,047
Other revenues
Shareholder servicing fees	21,695		20,843
Other	5,683		4,672
	997,465		907,320
Not subject to contracts with customers:
Dividend and interest income, net of interest expense	7,540		11,146
Investment gains (losses)	1,928		(44,306)
Other revenues	333		(4)
	9,801		(33,164)
Total net revenues	$	1,007,266	$	874,156

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Long-term Incentive Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Schedule of Share-based Compensation, Employee Stock Purchase Plan, Activity

Repurchases of AB Holding Units for the three months ended March 31, 2021 and 2020 consisted of the following:

	Three Months Ended March 31,
	2021		2020
	(in millions)
Total amount of AB Holding Units Purchased (1)	1.0		0.9
Total Cash Paid for AB Holding Units Purchased (1)	$	37.4	$	19.8
Open Market Purchases of AB Holding Units Purchased (2)	0.6		0.8
Total Cash Paid for Open Market Purchases of AB Holding Units (2)	$	24.2	$	17.3

(1) Purchased on a trade date basis.

(2) The remainder related to purchases of AB Holding Units from employees to fulfill statutory tax withholding requirements at the time of delivery of long-term incentive compensation award.

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Net Income per Unit (Tables)

3 Months Ended

Mar. 31, 2021

Earnings Per Unit [Abstract]

Schedule of Earnings Per Unit, Basic and Diluted

Basic net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the basic weighted average number of limited partnership units outstanding for each period. Diluted net income per unit is derived by reducing net income for the 1% general partnership interest and dividing the remaining 99% by the total of the diluted weighted average number of limited partnership units outstanding for each period.

	Three Months Ended March 31,
	2021		2020
	(in thousands, except per unit amounts)
Net income attributable to AB Unitholders	$	244,131	$	194,320
Weighted average limited partnership units outstanding – basic	272,332		270,498
Dilutive effect of compensatory options to buy AB Holding Units	32		32
Weighted average limited partnership units outstanding – diluted	272,364		270,530
Basic net income per AB Unit	$	0.89	$	0.71
Diluted net income per AB Unit	$	0.89	$	0.71

		Three Months Ended March 31,
		2021	2020
	(amounts as shown)
Anti-dilutive options excluded from diluted net income		—	29,056

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Investments (Tables)

3 Months Ended

Mar. 31, 2021

Investments, Debt and Equity Securities [Abstract]

Summary of Investments

Investments consist of:

	March 31, 2021		December 31, 2020
	(in thousands)
Equity securities:
Long-term incentive compensation-related	$	28,645	$	34,351
Seed capital	74,241		75,766
Other	11,469		55,439
Exchange-traded options	4,156		7,527
Investments in limited partnership hedge funds:
Long-term incentive compensation-related	30,085		25,762
Seed capital	17,363		16,646
Time deposits	18,233		18,602
Other	15,466		19,282
Total investments	$	199,658	$	253,375

Portion of Unrealized Gains (Losses) Related to Equity Securities

The portion of unrealized gains (losses) related to equity securities, as defined by ASC 321-10, held as of March 31, 2021 and 2020 were as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Net gains (losses) recognized during the period	$	4,887	$	(21,986)
Less: net gains (losses) recognized during the period on equity securities sold during the period	4,565		(1,395)
Unrealized gains (losses) recognized during the period on equity securities held	$	322	$	(20,591)

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Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Notional and Fair Value for Derivative Instruments Not Designated as Hedging Instruments

The notional value and fair value as of March 31, 2021 and December 31, 2020 for derivative instruments (excluding derivative instruments relating to our options desk trading activities discussed below) not designated as hedging instruments were as follows:

			Fair Value
	Notional Value		Derivative Assets		Derivative Liabilities
	(in thousands)
March 31, 2021:
Exchange-traded futures	$	146,700	$	1,962	$	678
Currency forwards	51,703		8,548		8,042
Interest rate swaps	60,997		1,670		2,425
Credit default swaps	178,035		11,369		9,430
Total return swaps	53,817		31		800
Option swaps	50,000		—		329
Total derivatives	$	541,252	$	23,580	$	21,704
December 31, 2020:
Exchange-traded futures	$	142,886	$	118	$	1,834
Currency forwards	63,906		8,576		8,451
Interest rate swaps	60,997		2,043		2,955
Credit default swaps	167,649		10,910		13,304
Total return swaps	52,061		94		1,847
Option swaps	2,486		—		2,146
Total derivatives	$	489,985	$	21,741	$	30,537

Gains and Losses for Derivative Instruments Recognized in Investment Gains (Losses) in the Condensed Consolidated Statements of Income

The gains and losses for derivative instruments (excluding our options desk trading activities discussed below) for the three months ended March 31, 2021 and 2020 recognized in investment gains (losses) in the condensed consolidated statements of income were as follows:

	Three Months Ended March 31,
	2021		2020
Exchange-traded futures	$	1,135	$	1,006
Currency forwards	1,181		658
Interest rate swaps	88		(612)
Credit default swaps	(522)		12,101
Total return swaps	(907)		15,115
Option swaps	1,361		1,298
Net gains on derivative instruments	$	2,336	$	29,566

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Offsetting Assets and Liabilities (Tables)

3 Months Ended

Mar. 31, 2021

Offsetting [Abstract]

Schedule of Offsetting of Financial Assets

Offsetting of assets as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Securities borrowed	$	24,294	$	—	$	24,294	$	(19,526)	$	—	$	4,768
Derivatives	$	23,580	$	—	$	23,580	$	—	$	(3,890)	$	19,690
Long exchange-traded options	$	4,156	$	—	$	4,156	$	—	$	—	$	4,156
December 31, 2020:
Securities borrowed	$	7,808	$	—	$	7,808	$	(7,344)	$	—	$	464
Derivatives	$	21,741	$	—	$	21,741	$	—	$	(380)	$	21,361
Long exchange-traded options	$	7,527	$	—	$	7,527	$	—	$	—	$	7,527

Offsetting of derivative assets of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	2,904	$	—	$	2,904	$	—	$	(551)	$	2,353
Derivatives - VOEs	$	2,395	$	—	$	2,395	$	—	$	—	$	2,395
December 31, 2020:
Derivatives - VIEs	$	3,224	$	—	$	3,224	$	—	$	(513)	$	2,711
Derivatives - VOEs	$	464	$	—	$	464	$	—	$	—	$	464

Schedule of Offsetting of Financial Liabilities

Offsetting of liabilities as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives	$	21,704	$	—	$	21,704	$	—	$	(3,338)	$	18,366
Short exchange-traded options	$	1,270	$	—	$	1,270	$	—	$	—	$	1,270
December 31, 2020:
Derivatives	$	30,537	$	—	$	30,537	$	—	$	(6,374)	$	24,163
Short exchange-traded options	$	12,486	$	—	$	12,486	$	—	$	—	$	12,486

Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	12,184	$	—	$	12,184	$	—	$	(4,929)	$	7,255
Derivatives - VOEs	$	7,757	$	—	$	7,757	$	—	$	—	$	7,757
December 31, 2020:
Derivatives - VIEs	$	6,893	$	—	$	6,893	$	—	$	(4,201)	$	2,692
Derivatives - VOEs	$	664	$	—	$	664	$	—	$	(138)	$	526

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Fair Value (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

Valuation of our financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
March 31, 2021:
Money markets	$	163,018	$	—	$	—	$	—	$	—	$	163,018
Securities segregated (U.S. Treasury Bills)	—		1,412,873		—		—		—		1,412,873
Derivatives	1,962		21,618		—		—		—		23,580
Investments:
Equity securities	96,524		17,548		124		159		—		114,355
Long exchange-traded options	4,156		—		—		—		—		4,156
Limited partnership hedge funds(2)	—		—		—		—		47,448		47,448
Time deposits(3)	—		—		—		—		18,233		18,233
Other investments	7,443		—		—		—		8,023		15,466
Total investments	108,123		17,548		124		159		73,704		199,658
Total assets measured at fair value	$	273,103	$	1,452,039	$	124	$	159	$	73,704	$	1,799,129
Securities sold not yet purchased:
Short equities – corporate	$	7,037	$	—	$	—	$	—	$	—	$	7,037
Short exchange-traded options	1,270		—		—		—		—		1,270
Derivatives	678		21,026		—		—		—		21,704
Contingent payment arrangements	—		—		36,073		—		—		36,073
Total liabilities measured at fair value	$	8,985	$	21,026	$	36,073	$	—	$	—	$	66,084

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
December 31, 2020:
Money markets	$	130,675	$	—	$	—	$	—	$	—	$	130,675
Securities segregated (U.S. Treasury Bills)	—		1,752,906		—		—		—		1,752,906
Derivatives	118		21,623		—		—		—		21,741
Investments:
Equity securities	147,705		17,565		125		161		—		165,556
Long exchange-traded options	7,527		—		—		—		—		7,527
Limited partnership hedge funds(2)	—		—		—		—		42,408		42,408
Time deposits(3)	—		—		—		—		18,602		18,602
Other investments	7,011		—		—		—		12,271		19,282
Total investments	162,243		17,565		125		161		73,281		253,375
Total assets measured at fair value	$	293,036	$	1,792,094	$	125	$	161	$	73,281	$	2,158,697
Securities sold not yet purchased:
Short equities – corporate	$	5,305	$	—	$	—	$	—	$	—	$	5,305
Short exchange-traded options	12,486		—		—		—		—		12,486
Derivatives	1,834		28,703		—		—		—		30,537
Contingent payment arrangements	—		—		27,750		—		—		27,750
Total liabilities measured at fair value	$	19,625	$	28,703	$	27,750	$	—	$	—	$	76,078

(1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient.

(2) Investments in equity method investees that are not measured at fair value in accordance with GAAP.

(3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP.

Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		Total
March 31, 2021:
Investments - VIEs	$	51,869	$	195,206	$	506	$	247,581
Investments - VOEs	301		59,950		211		60,462
Derivatives - VIEs	515		2,389		—		2,904
Derivatives - VOEs	—		2,395		—		2,395
Total assets measured at fair value	$	52,685	$	259,940	$	717	$	313,342
Derivatives - VIEs	7,362		4,822		—		12,184
Derivatives - VOEs	7,071		686		—		7,757
Total liabilities measured at fair value	$	14,433	$	5,508	$	—	$	19,941
December 31, 2020:
Investments - VIEs	$	73,909	$	168,114	$	518	$	242,541
Investments - VOEs	—		59,940		101		60,041
Derivatives - VIEs	442		2,782		—		3,224
Derivatives - VOEs	—		464		—		464
Total assets measured at fair value	$	74,351	$	231,300	$	619	$	306,270
Derivatives - VIEs	$	1,649	$	5,244	$	—	$	6,893
Derivatives - VOEs	—		664		—		664
Total liabilities measured at fair value	$	1,649	$	5,908	$	—	$	7,557

Schedule of Change in Carrying Value Level 3 Financial Instruments

The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as equity securities, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	125	$	119
Purchases	—		—
Sales	—		—
Realized gains (losses), net	—		—
Unrealized gains (losses), net	(1)		(1)
Balance as of end of period	$	124	$	118

The change in carrying value associated with Level 3 financial instruments carried at fair value within consolidated company-sponsored investment funds was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	619	$	854
Transfers (out) in	(10)		231
Purchases	119		33
Sales	(3)		(362)
Realized gains (losses), net	3		—
Unrealized gains (losses), net	(11)		(224)
Accrued discounts	—		2
Balance as of end of period	$	717	$	534

Schedule of Contingent Payment Arrangements Level 3 Financial Instruments

The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as contingent payment arrangements, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	27,750	$	22,911
Addition	7,526		—
Accretion	797		793
Payments	—		—
Balance as of end of period	$	36,073	$	23,704

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Leases (Tables)

3 Months Ended

Mar. 31, 2021

Leases [Abstract]

Schedule of Leases

Leases included in the condensed consolidated statement of financial condition as of March 31, 2021 and December 31, 2020 were as follows:

	Classification	March 31, 2021		December 31, 2020
		(in thousands)
Operating Leases
Operating lease right-of-use assets	Right-of-use assets	$	407,608	$	416,007
Operating lease liabilities	Lease liabilities	490,121		503,174
Finance Leases
Property and equipment, gross	Right-of-use assets	7,329		5,167
Amortization of right-of-use assets	Right-of-use assets	(2,098)		(2,719)
Property and equipment, net		5,231		2,448
Finance lease liabilities	Lease liabilities	5,235		2,375

Components of Lease Expense and Supplemental Cash Flow Information

The components of lease expense included in the condensed consolidated statement of income as of March 31, 2021 and March 31, 2020 were as follows:

			Three Months Ended March 31,
	Classification		2021		2020
		(in thousands)
Operating lease cost	General and administrative		$	24,418	$	23,004
Financing lease cost:
Amortization of right-of-use assets	General and administrative		501		477
Interest on lease liabilities	Interest expense		22		26
Total finance lease cost			523		503
Variable lease cost (1)	General and administrative		9,546		9,477
Sublease income	General and administrative		(9,807)		(9,615)
Net lease cost			$	24,680	$	23,369

(1) Variable lease expense includes operating expenses, real estate taxes and employee parking.

Lease term and discount rate:
Weighted average remaining lease term (years):
Operating leases	7.23
Finance leases	3.52
Weighted average discount rate:
Operating leases	3.07	%
Finance leases	1.75	%

Supplemental cash flow information related to leases was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$	27,970	$	29,698
Operating cash flows used for financing leases	22		26
Financing cash flows from finance leases	424		504
Right-of-use assets obtained in exchange for lease obligations(1):
Operating leases (2)	12,161		—
Finance leases	3,283		1,695

(1) Represents non-cash activity and, accordingly, is not reflected in the consolidated statements of cash flows.

(2) Represents net non-cash activity of new lease obligations, extensions and reductions of existing lease obligations.

Schedule of Maturities of Finance Lease Liabilities

Maturities of lease liabilities were as follows:

	Operating Leases		Financing Leases		Total
Year ending December 31,	(in thousands)
2021 (excluding the three months ended March 31, 2021)	$	82,594	$	1,363	$	83,957
2022	100,370		1,551		101,921
2023	93,299		1,289		94,588
2024	90,283		722		91,005
2025	25,430		426		25,856
Thereafter	149,885		24		149,909
Total lease payments	541,861		5,375		547,236
Less interest	(51,740)		(140)
Present value of lease liabilities	$	490,121	$	5,235

Schedule of Maturities of Operating Lease Liabilities

Maturities of lease liabilities were as follows:

	Operating Leases		Financing Leases		Total
Year ending December 31,	(in thousands)
2021 (excluding the three months ended March 31, 2021)	$	82,594	$	1,363	$	83,957
2022	100,370		1,551		101,921
2023	93,299		1,289		94,588
2024	90,283		722		91,005
2025	25,430		426		25,856
Thereafter	149,885		24		149,909
Total lease payments	541,861		5,375		547,236
Less interest	(51,740)		(140)
Present value of lease liabilities	$	490,121	$	5,235

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Consolidated Company-Sponsored Investment Funds (Tables)

3 Months Ended

Mar. 31, 2021

Consolidated Company-Sponsored Investment Funds [Abstract]

Balances of Consolidated VIEs and VOEs included in Statement of Financial Condition

The balances of consolidated VIEs and VOEs included in our condensed consolidated statements of financial condition were as follows:

	March 31, 2021						December 31, 2020
	(in thousands)
	VIEs		VOEs		Total		VIEs		VOEs		Total
Cash and cash equivalents	$	35,084	$	3,477	$	38,561	$	36,370	$	136	$	36,506
Investments	247,581		60,462		308,043		242,541		60,041		302,582
Other assets	6,869		13,605		20,474		4,859		7,385		12,244
Total assets	$	289,534	$	77,544	$	367,078	$	283,770	$	67,562	$	351,332
Liabilities	$	13,922	$	28,609	$	42,531	$	7,741	$	22,879	$	30,620
Redeemable non-controlling interest	64,313		24,254		88,567		82,753		19,606		102,359
Partners' capital attributable to AB Unitholders	211,299		24,681		235,980		193,276		25,077		218,353
Total liabilities, redeemable non-controlling interest and partners' capital	$	289,534	$	77,544	$	367,078	$	283,770	$	67,562	$	351,332

Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis

Valuation of our financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
March 31, 2021:
Money markets	$	163,018	$	—	$	—	$	—	$	—	$	163,018
Securities segregated (U.S. Treasury Bills)	—		1,412,873		—		—		—		1,412,873
Derivatives	1,962		21,618		—		—		—		23,580
Investments:
Equity securities	96,524		17,548		124		159		—		114,355
Long exchange-traded options	4,156		—		—		—		—		4,156
Limited partnership hedge funds(2)	—		—		—		—		47,448		47,448
Time deposits(3)	—		—		—		—		18,233		18,233
Other investments	7,443		—		—		—		8,023		15,466
Total investments	108,123		17,548		124		159		73,704		199,658
Total assets measured at fair value	$	273,103	$	1,452,039	$	124	$	159	$	73,704	$	1,799,129
Securities sold not yet purchased:
Short equities – corporate	$	7,037	$	—	$	—	$	—	$	—	$	7,037
Short exchange-traded options	1,270		—		—		—		—		1,270
Derivatives	678		21,026		—		—		—		21,704
Contingent payment arrangements	—		—		36,073		—		—		36,073
Total liabilities measured at fair value	$	8,985	$	21,026	$	36,073	$	—	$	—	$	66,084

	Level 1		Level 2		Level 3		NAV Expedient(1)		Other		Total
December 31, 2020:
Money markets	$	130,675	$	—	$	—	$	—	$	—	$	130,675
Securities segregated (U.S. Treasury Bills)	—		1,752,906		—		—		—		1,752,906
Derivatives	118		21,623		—		—		—		21,741
Investments:
Equity securities	147,705		17,565		125		161		—		165,556
Long exchange-traded options	7,527		—		—		—		—		7,527
Limited partnership hedge funds(2)	—		—		—		—		42,408		42,408
Time deposits(3)	—		—		—		—		18,602		18,602
Other investments	7,011		—		—		—		12,271		19,282
Total investments	162,243		17,565		125		161		73,281		253,375
Total assets measured at fair value	$	293,036	$	1,792,094	$	125	$	161	$	73,281	$	2,158,697
Securities sold not yet purchased:
Short equities – corporate	$	5,305	$	—	$	—	$	—	$	—	$	5,305
Short exchange-traded options	12,486		—		—		—		—		12,486
Derivatives	1,834		28,703		—		—		—		30,537
Contingent payment arrangements	—		—		27,750		—		—		27,750
Total liabilities measured at fair value	$	19,625	$	28,703	$	27,750	$	—	$	—	$	76,078

(1) Investments measured at fair value using NAV (or its equivalent) as a practical expedient.

(2) Investments in equity method investees that are not measured at fair value in accordance with GAAP.

(3) Investments carried at amortized cost that are not measured at fair value in accordance with GAAP.

Valuation of consolidated company-sponsored investment funds' financial instruments by pricing observability levels as of March 31, 2021 and December 31, 2020 was as follows (in thousands):

	Level 1		Level 2		Level 3		Total
March 31, 2021:
Investments - VIEs	$	51,869	$	195,206	$	506	$	247,581
Investments - VOEs	301		59,950		211		60,462
Derivatives - VIEs	515		2,389		—		2,904
Derivatives - VOEs	—		2,395		—		2,395
Total assets measured at fair value	$	52,685	$	259,940	$	717	$	313,342
Derivatives - VIEs	7,362		4,822		—		12,184
Derivatives - VOEs	7,071		686		—		7,757
Total liabilities measured at fair value	$	14,433	$	5,508	$	—	$	19,941
December 31, 2020:
Investments - VIEs	$	73,909	$	168,114	$	518	$	242,541
Investments - VOEs	—		59,940		101		60,041
Derivatives - VIEs	442		2,782		—		3,224
Derivatives - VOEs	—		464		—		464
Total assets measured at fair value	$	74,351	$	231,300	$	619	$	306,270
Derivatives - VIEs	$	1,649	$	5,244	$	—	$	6,893
Derivatives - VOEs	—		664		—		664
Total liabilities measured at fair value	$	1,649	$	5,908	$	—	$	7,557

Schedule of Change in Carrying Value Level 3 Financial Instruments

The change in carrying value associated with Level 3 financial instruments carried at fair value, classified as equity securities, is as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	125	$	119
Purchases	—		—
Sales	—		—
Realized gains (losses), net	—		—
Unrealized gains (losses), net	(1)		(1)
Balance as of end of period	$	124	$	118

The change in carrying value associated with Level 3 financial instruments carried at fair value within consolidated company-sponsored investment funds was as follows:

	Three Months Ended March 31,
	2021		2020
	(in thousands)
Balance as of beginning of period	$	619	$	854
Transfers (out) in	(10)		231
Purchases	119		33
Sales	(3)		(362)
Realized gains (losses), net	3		—
Unrealized gains (losses), net	(11)		(224)
Accrued discounts	—		2
Balance as of end of period	$	717	$	534

Schedule of Offsetting of Derivative Assets

Offsetting of assets as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Securities borrowed	$	24,294	$	—	$	24,294	$	(19,526)	$	—	$	4,768
Derivatives	$	23,580	$	—	$	23,580	$	—	$	(3,890)	$	19,690
Long exchange-traded options	$	4,156	$	—	$	4,156	$	—	$	—	$	4,156
December 31, 2020:
Securities borrowed	$	7,808	$	—	$	7,808	$	(7,344)	$	—	$	464
Derivatives	$	21,741	$	—	$	21,741	$	—	$	(380)	$	21,361
Long exchange-traded options	$	7,527	$	—	$	7,527	$	—	$	—	$	7,527

Offsetting of derivative assets of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Received		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	2,904	$	—	$	2,904	$	—	$	(551)	$	2,353
Derivatives - VOEs	$	2,395	$	—	$	2,395	$	—	$	—	$	2,395
December 31, 2020:
Derivatives - VIEs	$	3,224	$	—	$	3,224	$	—	$	(513)	$	2,711
Derivatives - VOEs	$	464	$	—	$	464	$	—	$	—	$	464

Schedule of Offsetting of Derivative Liabilities

Offsetting of liabilities as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives	$	21,704	$	—	$	21,704	$	—	$	(3,338)	$	18,366
Short exchange-traded options	$	1,270	$	—	$	1,270	$	—	$	—	$	1,270
December 31, 2020:
Derivatives	$	30,537	$	—	$	30,537	$	—	$	(6,374)	$	24,163
Short exchange-traded options	$	12,486	$	—	$	12,486	$	—	$	—	$	12,486

Offsetting of derivative liabilities of consolidated company-sponsored investment funds as of March 31, 2021 and December 31, 2020 was as follows:

	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments Collateral		Cash Collateral Pledged		Net Amount
	(in thousands)
March 31, 2021:
Derivatives - VIEs	$	12,184	$	—	$	12,184	$	—	$	(4,929)	$	7,255
Derivatives - VOEs	$	7,757	$	—	$	7,757	$	—	$	—	$	7,757
December 31, 2020:
Derivatives - VIEs	$	6,893	$	—	$	6,893	$	—	$	(4,201)	$	2,692
Derivatives - VOEs	$	664	$	—	$	664	$	—	$	(138)	$	526

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Units Outstanding (Tables)

3 Months Ended

Mar. 31, 2021

Equity [Abstract]

Changes in AB Units Outstanding

Changes in AB Units outstanding during the three-month period ended March 31, 2021 were as follows:

Outstanding as of December 31, 2020	270,509,658
Options exercised	79,108
Units issued	2,847,552
Units retired(1)	(761,153)
Outstanding as of March 31, 2021	272,675,165

(1) During the three-months ended March 31, 2021, we purchased 1,400 AB Units in private transactions and retired them.

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Non-controlling Interests (Tables)

3 Months Ended

Mar. 31, 2021

Noncontrolling Interest [Abstract]

Non-controlling Interest in Net Income

Non-controlling interest in net income for the three months ended March 31, 2021 and 2020 consisted of the following:

		Three Months Ended March 31,
		2021		2020
	(in thousands)
Redeemable non-controlling interests:
Consolidated company-sponsored investment funds		$	(292)	$	(25,571)
Total non-controlling interest in net income		$	(292)	$	(25,571)

Redeemable Noncontrolling Interest

Redeemable non-controlling interest as of March 31, 2021 and December 31, 2020 consisted of the following:

	March 31, 2021		December 31, 2020
	(in thousands)
Consolidated company-sponsored investment funds	$	88,567	$	102,359
Total redeemable non-controlling interest	$	88,567	$	102,359

XML

Business Description Organization and Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2021 shares
AB Holding | EQH
General partnership information [Abstract]
General partnership interest in Company (percent)	4.00%
AB Holding | AB
General partnership information [Abstract]
General partnership interest in Company (percent)	1.00%
General Partnership number of general partnership units owned in Holding Company (in units)	100,000
Limited partners or members ownership interest in company (percent)	36.50%
EQH and its subsidiaries | AB
General partnership information [Abstract]
Limited partners or members ownership interest in company (percent)	62.80%
Unaffiliated holders | AB
General partnership information [Abstract]
Limited partners or members ownership interest in company (percent)	0.70%
AB | AB
General partnership information [Abstract]
Limited partners or members ownership interest in company (percent)	100.00%
AB | EQH and its subsidiaries
General partnership information [Abstract]
General partnership interest in Company (percent)	64.30%

XML

Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	$ 997,465	$ 907,320
Not subject to contracts with customers:
Dividend and interest income, net of interest expense	7,540	11,146
Investment gains (losses)	1,928	(44,306)
Other revenues	333	(4)
Total revenue not from contract with customer	9,801	(33,164)
Net revenues	1,007,266	874,156
Base fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	687,691	613,587
Performance-based fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	15,775	8,138
Bernstein research services
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	119,021	129,223
All-in-management fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	85,182	86,357
12b-1 fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	20,034	19,453
Other
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	42,384	25,047
Shareholder servicing fees
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	21,695	20,843
Other
Disaggregation of Revenue [Line Items]
Revenue subject to contracts with customers	$ 5,683	$ 4,672

XML

Long-term Incentive Compensation Plans - Unit Purchase Activity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Total amount of AB Holding Units Purchased (in units)	1.0	0.9
Total Cash Paid for AB Holding Units Purchased	$ 37.4	$ 19.8
Open Market Purchases of AB Holding Units Purchased (in units)	0.6	0.8
Total Cash Paid for Open Market Purchases of AB Holding Units	$ 24.2	$ 17.3

XML

Long-term Incentive Compensation Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Units granted to employees and Eligible Directors (in units)	3,400,000	100,000
Units issued upon exercise of options (in units)	79,108	5,182
Proceeds from stock options exercised	$ 1,914	$ 147

XML

Net Income per Unit (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Limited Partners interest in Company (as a percent)	99.00%
Net income per unit, basic and diluted [Abstract]
Net income attributable to AB Unitholders	$ 244,131	$ 194,320
Weighted average limited partnership units outstanding – basic (in units)	272,332,000	270,498,000
Dilutive effect of compensatory options to buy AB Holding Units (in units)	32,000	32,000
Weighted average limited partnership units outstanding – diluted (in units)	272,364,000	270,530,000
Basic net income per AB Unit (in dollars per unit)	$ 0.89	$ 0.71
Diluted net income per AB Unit (in dollars per unit)	$ 0.89	$ 0.71
Anti-dilutive options excluded from diluted net income (in units)	0	29,056
General Partner Interest
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
General partnership interest in Company (percent)	1.00%

XML

Cash Distributions (Details) - $ / shares		3 Months Ended
	Apr. 29, 2021	Mar. 31, 2021
Subsequent Event
Distribution Made to Limited Partner [Line Items]
Distribution declared (in dollars per unit)	$ 0.88
General Partner Interest
Distribution Made to Limited Partner [Line Items]
General partnership interest in Company (percent)		1.00%
General Partner Interest | Cash Distribution
Distribution Made to Limited Partner [Line Items]
General partnership interest in Company (percent)		1.00%

XML

Cash and Securities Segregated Under Federal Regulations and Other Requirements (Details) - USD ($) $ in Billions	Mar. 31, 2021	Dec. 31, 2020
Brokers and Dealers [Abstract]
United States Treasury Bills in special reserve bank custody account for exclusive benefit of brokerage customers of SCB LLC	$ 1.4	$ 1.8

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Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Summary of Investment Holdings [Line Items]
Investments owned	$ 199,658	$ 253,375
Long-term incentive compensation obligations	58,700	60,100
Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	327,100	310,300
Equity securities | Long-term incentive compensation-related
Summary of Investment Holdings [Line Items]
Investments owned	28,645	34,351
Equity securities | Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	74,241	75,766
Equity securities | Other
Summary of Investment Holdings [Line Items]
Investments owned	11,469	55,439
Exchange-traded options
Summary of Investment Holdings [Line Items]
Investments owned	4,156	7,527
Investments in limited partnership hedge funds | Long-term incentive compensation-related
Summary of Investment Holdings [Line Items]
Investments owned	30,085	25,762
Investments in limited partnership hedge funds | Seed capital
Summary of Investment Holdings [Line Items]
Investments owned	17,363	16,646
Time deposits
Summary of Investment Holdings [Line Items]
Investments owned	18,233	18,602
Other
Summary of Investment Holdings [Line Items]
Investments owned	$ 15,466	$ 19,282

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Investments - (Losses) Gains Related to Equity Securities (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period	$ 4,887	$ (21,986)
Less: net gains (losses) recognized during the period on equity securities sold during the period	4,565	(1,395)
Unrealized gains (losses) recognized during the period on equity securities held	$ 322	$ (20,591)

XML

Derivative Instruments - Notional Value and Fair Value of Derivative Instruments (Details) - Not Designated as Hedging Instrument - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Notional Value	$ 541,252	$ 489,985
Derivative Assets	23,580	21,741
Derivative Liabilities	21,704	30,537
Exchange-traded futures
Derivative [Line Items]
Notional Value	146,700	142,886
Derivative Assets	1,962	118
Derivative Liabilities	678	1,834
Currency forwards
Derivative [Line Items]
Notional Value	51,703	63,906
Derivative Assets	8,548	8,576
Derivative Liabilities	8,042	8,451
Interest rate swaps
Derivative [Line Items]
Notional Value	60,997	60,997
Derivative Assets	1,670	2,043
Derivative Liabilities	2,425	2,955
Credit default swaps
Derivative [Line Items]
Notional Value	178,035	167,649
Derivative Assets	11,369	10,910
Derivative Liabilities	9,430	13,304
Total return swaps
Derivative [Line Items]
Notional Value	53,817	52,061
Derivative Assets	31	94
Derivative Liabilities	800	1,847
Option swaps
Derivative [Line Items]
Notional Value	50,000	2,486
Derivative Assets	0	0
Derivative Liabilities	$ 329	$ 2,146

XML

Derivative Instruments - Gains and Losses for Derivative Instruments Recognized in Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Net gains on derivative instruments	$ 2,336	$ 29,566
Exchange-traded futures
Derivative [Line Items]
Net gains on derivative instruments	1,135	1,006
Currency forwards
Derivative [Line Items]
Net gains on derivative instruments	1,181	658
Interest rate swaps
Derivative [Line Items]
Net gains on derivative instruments	88	(612)
Credit default swaps
Derivative [Line Items]
Net gains on derivative instruments	(522)	12,101
Total return swaps
Derivative [Line Items]
Net gains on derivative instruments	(907)	15,115
Option swaps
Derivative [Line Items]
Net gains on derivative instruments	$ 1,361	$ 1,298

XML

Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative [Line Items]
Cash collateral payable to trade counterparties	$ 3,900		$ 400
Cash collateral received	3,300		6,400
Loss on equity options activity	4,800	$ (18,400)
Exchange-traded options | Long
Derivative [Line Items]
Cash collateral payable to trade counterparties	0		0
Long exchange-traded equity options	4,200		7,500
Exchange-traded options | Short
Derivative [Line Items]
Cash collateral received	0		0
Short exchange-traded equity options, included in securities sold not yet purchased	$ 1,300		$ 12,500

XML

Offsetting Assets and Liabilities - Offsetting Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivative Asset [Abstract]
Cash Collateral Received	$ (3,900)	$ (400)
Securities borrowed
Securities Borrowed [Abstract]
Gross Amounts of Recognized Assets	24,294	7,808
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	24,294	7,808
Financial Instruments Collateral	(19,526)	(7,344)
Cash Collateral Received	0	0
Net Amount	4,768	464
Derivatives
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	23,580	21,741
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	23,580	21,741
Financial Instruments Collateral	0	0
Cash Collateral Received	(3,890)	(380)
Net Amount	19,690	21,361
Exchange-traded options | Long
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	4,156	7,527
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	4,156	7,527
Financial Instruments Collateral	0	0
Cash Collateral Received	0	0
Net Amount	$ 4,156	$ 7,527

XML

Offsetting Assets and Liabilities - Offsetting Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Offsetting Liabilities [Line Items]
Cash Collateral Pledged	$ (3,300)	$ (6,400)
Derivatives
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	21,704	30,537
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	21,704	30,537
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(3,338)	(6,374)
Net Amount	18,366	24,163
Exchange-traded options | Short
Offsetting Liabilities [Line Items]
Gross Amounts of Recognized Liabilities	1,270	12,486
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	1,270	12,486
Financial Instruments Collateral	0	0
Cash Collateral Pledged	0	0
Net Amount	$ 1,270	$ 12,486

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Fair Value - Valuation of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	$ 73,704	$ 73,281
Securities sold not yet purchased:
Contingent payment arrangements	7,525		$ 0
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money markets	163,018	130,675
Securities segregated (U.S. Treasury Bills)	1,412,873	1,752,906
Derivatives	23,580	21,741
Total investments measured at fair value and other measurements	199,658	253,375
Total assets measured at fair value and other measurements	1,799,129	2,158,697
Securities sold not yet purchased:
Short equities – corporate	7,037	5,305
Short exchange-traded options	1,270	12,486
Derivatives	21,704	30,537
Contingent payment arrangements	36,073	27,750
Total liabilities measured at fair value	66,084	76,078
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money markets	163,018	130,675
Securities segregated (U.S. Treasury Bills)	0	0
Derivatives	1,962	118
Total investments	108,123	162,243
Total assets measured at fair value	273,103	293,036
Securities sold not yet purchased:
Short equities – corporate	7,037	5,305
Short exchange-traded options	1,270	12,486
Derivatives	678	1,834
Contingent payment arrangements	0	0
Total liabilities measured at fair value	8,985	19,625
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money markets	0	0
Securities segregated (U.S. Treasury Bills)	1,412,873	1,752,906
Derivatives	21,618	21,623
Total investments	17,548	17,565
Total assets measured at fair value	1,452,039	1,792,094
Securities sold not yet purchased:
Short equities – corporate	0	0
Short exchange-traded options	0	0
Derivatives	21,026	28,703
Contingent payment arrangements	0	0
Total liabilities measured at fair value	21,026	28,703
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money markets	0	0
Securities segregated (U.S. Treasury Bills)	0	0
Derivatives	0	0
Total investments	124	125
Total assets measured at fair value	124	125
Securities sold not yet purchased:
Short equities – corporate	0	0
Short exchange-traded options	0	0
Derivatives	0	0
Contingent payment arrangements	36,073	27,750
Total liabilities measured at fair value	36,073	27,750
Recurring | NAV Expedient
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
NAV Expedient	159	161
Equity securities | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	114,355	165,556
Equity securities | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	96,524	147,705
Equity securities | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	17,548	17,565
Equity securities | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	124	125
Equity securities | Recurring | NAV Expedient
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
NAV Expedient	159	161
Other investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	8,023	12,271
Other investments | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments measured at fair value and other measurements	15,466	19,282
Other investments | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total investments	7,443	7,011
Time deposits
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	18,233	18,602
Time deposits | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	18,233	18,602
Long | Exchange-traded options | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	4,156	7,527
Long | Exchange-traded options | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	4,156	7,527
Long | Exchange-traded options | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Long | Exchange-traded options | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading securities	0	0
Limited partnership hedge funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	47,448	42,408
Limited partnership hedge funds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other	$ 47,448	$ 42,408

XML

Fair Value (Details)	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2020 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	$ 73,704,000	$ 73,281,000
Fair value, assets, Level 2 to Level 3 transfers, amount	0
Contingent payment arrangements	7,525,000		$ 0
Recurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Contingent payment arrangements	36,073,000	$ 27,750,000
Revenue growth rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability		0.020	0.007
Revenue growth rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability		1.356	0.500
Revenue growth rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability		0.090	0.049
Discount rate | Minimum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability		0.019	0.030
Discount rate | Maximum
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability		0.200	0.100
Discount rate | Weighted Average
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Acquisition-related contingent liability		0.108	0.093
Software publishing company
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	2,200,000	$ 2,100,000
Start-up company
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments		300,000
Equity method investee
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	2,300,000	$ 6,500,000
Broker dealer exchange memberships
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other investments	$ 3,300,000

XML

Fair Value - Change in Carrying Value of Level 3 Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair value measurement Level 3 reconciliation [Abstract]
Balance as of beginning of period	$ 125	$ 119
Purchases	0	0
Sales	0	0
Realized gains (losses), net	0	0
Unrealized gains (losses), net	(1)	(1)
Balance as of end of period	$ 124	$ 118

XML

Fair Value - Change in Carrying Value Associated with Contingent Payment Arrangements Level 3 Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair Value, Liabilities Measurement Level 3 reconciliation
Balance as of beginning of period	$ 27,750	$ 22,911
Addition	7,526	0
Accretion	797	793
Payments	0	0
Balance as of end of period	$ 36,073	$ 23,704

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Leases - Additional Information (Details) ft² in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) ft²
Lessee, Lease, Description [Line Items]
Operating and finance lease, maximum term of extension option	5 years
Operating and finance lease, term of termination option	1 year
Area of space leased (in square feet) | ft²	1,000
Total base rent obligation | $	$ 541,861
New York City
Lessee, Lease, Description [Line Items]
Area of space leased (in square feet) | ft²	166
Operating lease, lease not yet commenced, term of contract	20 years
Total base rent obligation | $	$ 393,000
Minimum
Lessee, Lease, Description [Line Items]
Operating and finance lease, remaining contract term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating and finance lease, remaining contract term	15 years

XML

Leases - Leases included in the Condensed Consolidated Statement of Financial Condition (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
Operating lease right-of-use assets	$ 407,608	$ 416,007
Operating lease liabilities	490,121	503,174
Finance Leases
Property and equipment, gross	7,329	5,167
Amortization of right-of-use assets	(2,098)	(2,719)
Property and equipment, net	5,231	2,448
Finance lease liabilities	$ 5,235	$ 2,375
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Lease liabilities
Finance Lease, Liability, Statement of Financial Position [Extensible List]	Lease liabilities

XML

Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 24,418	$ 23,004
Financing lease cost:
Amortization of right-of-use assets	501	477
Interest on lease liabilities	22	26
Total finance lease cost	523	503
Variable lease cost	9,546	9,477
Sublease income	(9,807)	(9,615)
Net lease cost	$ 24,680	$ 23,369

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Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
2021 (excluding the three months ended March 31, 2021)	$ 82,594
2022	100,370
2023	93,299
2024	90,283
2025	25,430
Thereafter	149,885
Total lease payments	541,861
Less interest	(51,740)
Present value of lease liabilities	490,121	$ 503,174
Financing Leases
2021 (excluding the three months ended March 31, 2021)	1,363
2022	1,551
2023	1,289
2024	722
2025	426
Thereafter	24
Total lease payments	5,375
Less interest	(140)
Present value of lease liabilities	5,235	$ 2,375
Total
2021 (excluding the three months ended March 31, 2021)	83,957
2022	101,921
2023	94,588
2024	91,005
2025	25,856
Thereafter	149,909
Total lease payments	$ 547,236

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Leases - Lease Term and Discount Rate (Details)	Mar. 31, 2021
Weighted average remaining lease term (years):
Operating leases	7 years 2 months 23 days
Finance leases	3 years 6 months 7 days
Weighted average discount rate:
Operating leases	3.07%
Finance leases	1.75%

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Leases - Supplemental Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used for operating leases	$ 27,970	$ 29,698
Operating cash flows used for financing leases	22	26
Financing cash flows from finance leases	424	504
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	12,161	0
Finance leases	$ 3,283	$ 1,695

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Consolidated Company-Sponsored Investment Funds - Summary of Balance Sheet Amounts (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Condensed Balance Sheet Statements, Captions [Line Items]
Other assets	$ 327,680	$ 264,418
Total assets	9,454,866	9,697,840
Liabilities	5,317,137	5,483,958
Redeemable non-controlling interest	88,567	102,359
Partners' capital attributable to AB Unitholders	4,049,162	4,111,523
Total liabilities, redeemable non-controlling interest and capital	9,454,866	9,697,840
Company-sponsored investment funds
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	38,561	36,506
Investments	308,043	302,582
Other assets	20,474	12,244
Redeemable non-controlling interest	88,567	102,359
Reportable entities | Company-sponsored investment funds
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	38,561	36,506
Investments	308,043	302,582
Other assets	20,474	12,244
Total assets	367,078	351,332
Liabilities	42,531	30,620
Redeemable non-controlling interest	88,567	102,359
Partners' capital attributable to AB Unitholders	235,980	218,353
Total liabilities, redeemable non-controlling interest and capital	367,078	351,332
Reportable entities | VIEs
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	35,084	36,370
Investments	247,581	242,541
Other assets	6,869	4,859
Total assets	289,534	283,770
Liabilities	13,922	7,741
Redeemable non-controlling interest	64,313	82,753
Partners' capital attributable to AB Unitholders	211,299	193,276
Total liabilities, redeemable non-controlling interest and capital	289,534	283,770
Reportable entities | VOEs
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	3,477	136
Investments	60,462	60,041
Other assets	13,605	7,385
Total assets	77,544	67,562
Liabilities	28,609	22,879
Redeemable non-controlling interest	24,254	19,606
Partners' capital attributable to AB Unitholders	24,681	25,077
Total liabilities, redeemable non-controlling interest and capital	$ 77,544	$ 67,562

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Consolidated Company-Sponsored Investment Funds (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Derivative [Line Items]
Gains (losses) on derivative instruments	$ 2,336,000	$ 29,566,000
Cash collateral payable to trade counterparties	3,900,000		$ 400,000
Cash collateral received	3,300,000		6,400,000
Advisory fee receivables	143,819,000		148,746,000
VIEs
Derivative [Line Items]
Futures, forwards and swaps held	9,300,000		3,700,000
Gains (losses) on derivative instruments	(1,100,000)	(1,700,000)
Cash collateral payable to trade counterparties including amounts that exceed fair value of assets	600,000
Cash collateral payable to trade counterparties	551,000		513,000
Cash collateral received	4,900,000		4,200,000
VOEs
Derivative [Line Items]
Futures, forwards and swaps held	5,400,000		200,000
Gains (losses) on derivative instruments	900,000	$ 100,000
Cash collateral payable to trade counterparties	0		0
Cash collateral received	0		$ 100,000
Variable Interest Entity, Not Primary Beneficiary
Derivative [Line Items]
Net assets	70,900,000,000
Maximum risk of loss in investment in VIEs	7,200,000
Advisory fee receivables	76,100,000
Seed capital
Derivative [Line Items]
Seed investment, deconsolidated amount	$ 4,100,000

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Consolidated Company-Sponsored Investment Funds - Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	$ 23,580	$ 21,741
Derivatives	21,704	30,537
Total liabilities measured at fair value	66,084	76,078
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	108,123	162,243
Derivatives	1,962	118
Total assets measured at fair value	273,103	293,036
Derivatives	678	1,834
Total liabilities measured at fair value	8,985	19,625
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	17,548	17,565
Derivatives	21,618	21,623
Total assets measured at fair value	1,452,039	1,792,094
Derivatives	21,026	28,703
Total liabilities measured at fair value	21,026	28,703
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	124	125
Derivatives	0	0
Total assets measured at fair value	124	125
Derivatives	0	0
Total liabilities measured at fair value	36,073	27,750
Company-sponsored investment funds | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	313,342	306,270
Total liabilities measured at fair value	19,941	7,557
Company-sponsored investment funds | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	52,685	74,351
Total liabilities measured at fair value	14,433	1,649
Company-sponsored investment funds | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	259,940	231,300
Total liabilities measured at fair value	5,508	5,908
Company-sponsored investment funds | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets measured at fair value	717	619
Total liabilities measured at fair value	0	0
VIEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	2,904	3,224
Derivatives	12,184	6,893
VIEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	247,581	242,541
Derivatives	2,904	3,224
Derivatives	12,184	6,893
VIEs | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	51,869	73,909
Derivatives	515	442
Derivatives	7,362	1,649
VIEs | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	195,206	168,114
Derivatives	2,389	2,782
Derivatives	4,822	5,244
VIEs | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	506	518
Derivatives	0	0
Derivatives	0	0
VOEs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives	2,395	464
Derivatives	7,757	664
VOEs | Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	60,462	60,041
Derivatives	2,395	464
Derivatives	7,757	664
VOEs | Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	301	0
Derivatives	0	0
Derivatives	7,071	0
VOEs | Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	59,950	59,940
Derivatives	2,395	464
Derivatives	686	664
VOEs | Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments	211	101
Derivatives	0	0
Derivatives	$ 0	$ 0

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Consolidated Company-Sponsored Investment Funds - Change in Carrying Value Associated with Level 3 Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fair value measurement Level 3 reconciliation [Abstract]
Balance as of beginning of period	$ 125	$ 119
Purchases	0	0
Sales	0	0
Realized gains (losses), net	0	0
Unrealized gains (losses), net	(1)	(1)
Balance as of end of period	124	118
Company-sponsored investment funds
Fair value measurement Level 3 reconciliation [Abstract]
Balance as of beginning of period	619	854
Transfers (out) in	(10)	231
Purchases	119	33
Sales	(3)	(362)
Realized gains (losses), net	3	0
Unrealized gains (losses), net	(11)	(224)
Accrued discounts	0	2
Balance as of end of period	$ 717	$ 534

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Consolidated Company-Sponsored Investment Funds - Offsetting of Derivative Assets and Liabilities (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Derivative Asset [Abstract]
Cash Collateral Received	$ (3,900,000)	$ (400,000)
VIEs
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	2,904,000	3,224,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	2,904,000	3,224,000
Financial Instruments Collateral	0	0
Cash Collateral Received	(551,000)	(513,000)
Net Amount	2,353,000	2,711,000
Derivative Liability [Abstract]
Gross Amounts of Recognized Liabilities	12,184,000	6,893,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	12,184,000	6,893,000
Financial Instruments Collateral	0	0
Cash Collateral Pledged	(4,929,000)	(4,201,000)
Net Amount	7,255,000	2,692,000
VOEs
Derivative Asset [Abstract]
Gross Amounts of Recognized Assets	2,395,000	464,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Assets Presented in the Statement of Financial Condition	2,395,000	464,000
Financial Instruments Collateral	0	0
Cash Collateral Received	0	0
Net Amount	2,395,000	464,000
Derivative Liability [Abstract]
Gross Amounts of Recognized Liabilities	7,757,000	664,000
Gross Amounts Offset in the Statement of Financial Condition	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Condition	7,757,000	664,000
Financial Instruments Collateral	0	0
Cash Collateral Pledged	0	(138,000)
Net Amount	$ 7,757,000	$ 526,000

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Units Outstanding (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Units Outstanding
Outstanding as of December 31, 2020 (in units)	270,509,658
Options exercised (in units)	79,108	5,182
Units issued (in units)	2,847,552
Units retired (in units)	(761,153)
Balance as of March 31, 2021 (in units)	272,675,165
Limited Partners Capital Account Units
Units Outstanding
Units retired (in units)	(1,400)

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Debt (Details)	3 Months Ended
	Mar. 31, 2021 USD ($) line_of_credit financial_institution	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Sep. 01, 2020 USD ($)
Line of Credit
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 800,000,000.0
Maximum incremental increase	200,000,000.0
Amount outstanding	$ 0		$ 0
Commercial Paper
Short-term Debt [Line Items]
Weighted average interest rates on average daily borrowings	0.20%	0.40%
Short-term debt	$ 0		0
Short-term debt, average outstanding amount	120,300,000	$ 83,200,000
Uncommited Lines of Credit
Short-term Debt [Line Items]
Weighted average interest rates		1.60%
Short-term debt	0		0
Short-term debt, average outstanding amount		$ 900,000
Subsidiaries | Line of Credit
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 165,000,000.0
Number of uncommitted lines of credit | line_of_credit	3
Number of financial institutions offering lines of credit | financial_institution	3
Number of financial institutions with stated limits | line_of_credit	2
EQH
Short-term Debt [Line Items]
Amount outstanding	$ 625,000,000.0		675,000,000.0
Weighted average interest rates	0.20%
Average daily borrowings	$ 622,300,000	$ 470,800,000
Weighted average interest rates on average daily borrowings	0.20%	0.50%
Revolving Credit Facility
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	$ 200,000,000.0
Revolving Credit Facility | Line of Credit
Short-term Debt [Line Items]
Amount outstanding	$ 0		0
Weighted average interest rates	1.10%	1.60%
Average daily borrowings	$ 26,100,000	$ 16,500,000
Revolving Credit Facility | EQH
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity	900,000,000.0
Revolving Credit Facility | EQH Uncommitted Facility
Short-term Debt [Line Items]
Line of credit facility, maximum borrowing capacity				$ 300,000,000.0
Amount outstanding	$ 0		$ 0

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Non-controlling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Redeemable non-controlling interests:
Total non-controlling interest in net income	$ (292)	$ (25,571)
Redeemable non-controlling interest	88,567		$ 102,359
Company-sponsored investment funds
Redeemable non-controlling interests:
Consolidated company-sponsored investment funds	(292)	$ (25,571)
Redeemable non-controlling interest	$ 88,567		$ 102,359