10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 ________________________________________

FORM 10-Q

________________________________________

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

For the quarterly period ended September 30, 2021

or

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

For the transition period from_________to ________

Commission File Number: 0-10200

________________________________________ 

________________________________________

SEI INVESTMENTS COMPANY

(Exact Name of Registrant as Specified in its Charter)

________________________________________ 

Pennsylvania	23-1707341
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)

1 Freedom Valley Drive, Oaks, Pennsylvania 19456-1100

(Address of Principal Executive Offices) (Zip Code)

(610) 676-1000

(Registrant’s Telephone Number, Including Area Code)

N/A

(Former Name, Former Address and Former Fiscal Year, if Changed Since Last Report) 

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

Title of each class	Trading Symbol	Name of each exchange on which registered
Common Stock, par value $0.01 per share	SEIC	The NASDAQ Stock Market LLC

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  x    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  x    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 the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	x	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 Act).  Yes  ☐    No  x

The number of shares outstanding of the registrant’s common stock, as of the close of business on October 21, 2021:

Common Stock, $0.01 par value 139,452,507 

SEI INVESTMENTS COMPANY

TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION
		Page
Item 1.	Financial Statements.	2
	Consolidated Balance Sheets (Unaudited) -- September 30, 2021 and December 31, 2020	2
	Consolidated Statements of Operations (Unaudited) -- For the Three and Nine Months Ended September 30, 2021 and 2020	4
	Consolidated Statements of Comprehensive Income (Unaudited) -- For the Three and Nine Months Ended September 30, 2021 and 2020	5
	Consolidated Statements of Changes in Equity (Unaudited) -- For the Three and Nine Months Ended September 30, 2021 and 2020	6
	Consolidated Condensed Statements of Cash Flows (Unaudited) -- For the Nine Months Ended September 30, 2021 and 2020	8
	Notes to Consolidated Financial Statements	9
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	28
Item 3.	Quantitative and Qualitative Disclosures About Market Risk.	43
Item 4.	Controls and Procedures.	43
PART II - OTHER INFORMATION
Item 1.	Legal Proceedings.	45
Item 1A.	Risk Factors.	45
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	45
Item 6.	Exhibits.	45
	Signatures	46

1

PART I.        FINANCIAL INFORMATION

Item 1.    Consolidated Financial Statements.

SEI Investments Company

Consolidated Balance Sheets

(unaudited)

(In thousands, except par value)

	September 30, 2021		December 31, 2020
Assets
Current Assets:
Cash and cash equivalents	$	793,883	$	784,626
Restricted cash	351		3,101
Receivables from investment products	59,808		55,271
Receivables, net of allowance for doubtful accounts of $2,669 and $1,100	442,187		385,219
Securities owned	31,770		34,064
Other current assets	42,615		38,696
Total Current Assets	1,370,614		1,300,977
Property and Equipment, net of accumulated depreciation of $400,679 and $378,639	183,802		189,052
Operating Lease Right-of-Use Assets	35,145		38,397
Capitalized Software, net of accumulated amortization of $531,923 and $491,739	250,280		270,977
Available for Sale and Equity Securities	140,079		105,419
Investments in Affiliated Funds, at fair value	6,893		6,166
Investment in Unconsolidated Affiliate	39,872		98,433
Goodwill	64,489		64,489
Intangible Assets, net of accumulated amortization of $15,768 and $12,456	31,992		24,304
Deferred Contract Costs	34,263		33,781
Deferred Income Taxes	2,148		2,972
Other Assets, net	32,224		32,289
Total Assets	$	2,191,801	$	2,167,256

The accompanying notes are an integral part of these consolidated financial statements.

2

SEI Investments Company

Consolidated Balance Sheets

(unaudited)

(In thousands, except par value)

	September 30, 2021		December 31, 2020
Liabilities and Equity
Current Liabilities:
Accounts payable	$	10,772	$	7,766
Accrued liabilities	231,043		299,845
Current portion of long-term operating lease liabilities	10,412		8,579
Deferred revenue	1,235		1,085
Total Current Liabilities	253,462		317,275
Long-term Income Taxes Payable	803		803
Deferred Income Taxes	47,434		55,159
Long-term Operating Lease Liabilities	29,857		34,058
Other Long-term Liabilities	22,157		20,054
Total Liabilities	353,713		427,349
Commitments and Contingencies
Shareholders' Equity:
Common stock, $0.01 par value, 750,000 shares authorized; 139,305 and 143,396 shares issued and outstanding	1,393		1,434
Capital in excess of par value	1,228,085		1,190,001
Retained earnings	629,153		565,270
Accumulated other comprehensive loss, net	(20,543)		(16,798)
Total Shareholders' Equity	1,838,088		1,739,907
Total Liabilities and Shareholders' Equity	$	2,191,801	$	2,167,256

The accompanying notes are an integral part of these consolidated financial statements.

3

SEI Investments Company

Consolidated Statements of Operations

(unaudited)

(In thousands, except per share data)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Revenues:
Asset management, administration and distribution fees	$	393,296	$	339,609	$	1,143,451	$	992,039
Information processing and software servicing fees	92,026		85,318		273,208		248,296
Total revenues	485,322		424,927		1,416,659		1,240,335
Expenses:
Subadvisory, distribution and other asset management costs	55,619		45,126		161,610		134,645
Software royalties and other information processing costs	7,348		6,992		20,561		21,828
Compensation, benefits and other personnel	150,188		134,795		429,188		391,607
Stock-based compensation	11,318		6,467		31,173		20,458
Consulting, outsourcing and professional fees	55,868		57,949		165,657		168,350
Data processing and computer related	26,650		24,437		79,746		71,647
Facilities, supplies and other costs	14,124		16,679		49,851		47,448
Amortization	14,674		13,200		43,749		39,417
Depreciation	8,408		7,945		25,141		23,058
Total expenses	344,197		313,590		1,006,676		918,458
Income from operations	141,125		111,337		409,983		321,877
Net (loss) gain from investments	(575)		776		134		(1,310)
Interest and dividend income	892		1,009		2,715		5,582
Interest expense	(101)		(153)		(354)		(456)
Equity in earnings of unconsolidated affiliate	35,005		28,305		103,420		86,488
Income before income taxes	176,346		141,274		515,898		412,181
Income taxes	38,301		30,178		114,605		90,777
Net income	$	138,045	$	111,096	$	401,293	$	321,404
Basic earnings per common share	$	0.98	$	0.76	$	2.83	$	2.18
Shares used to compute basic earnings per share	140,507		145,812		141,928		147,586
Diluted earnings per common share	$	0.97	$	0.75	$	2.79	$	2.14
Shares used to compute diluted earnings per share	142,426		147,907		143,981		149,958
Dividends declared per common share	$	—	$	—	$	0.37	$	0.35

The accompanying notes are an integral part of these consolidated financial statements.

4

SEI Investments Company

Consolidated Statements of Comprehensive Income

(unaudited)

(In thousands)

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net income	$	138,045	$	111,096	$	401,293	$	321,404
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(5,546)		7,085		(2,867)		(5,051)
Unrealized (loss) gain on investments:
Unrealized (losses) gains during the period, net of income taxes of $208, $154, $453 and $(218)	(713)		(542)		(1,548)		702
Reclassification adjustment for losses realized in net income, net of income taxes of $(67), $(63), $(190) and $(126)	238		238		670		455
Total other comprehensive (loss) income, net of tax	(6,021)		6,781		(3,745)		(3,894)
Comprehensive income	$	132,024	$	117,877	$	397,548	$	317,510

The accompanying notes are an integral part of these consolidated financial statements.

5

SEI Investments Company

Consolidated Statements of Changes in Equity

(unaudited)

(In thousands)

	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
	For the Three Months Ended September 30, 2021
Balance, July 1, 2021	141,027	$	1,410	$	1,219,487	$	599,231	$	(14,522)	$	1,805,606
Net income	—	—		—		138,045		—		138,045
Other comprehensive loss	—	—		—		—		(6,021)		(6,021)
Purchase and retirement of common stock	(1,980)	(21)		(11,751)		(108,123)		—		(119,895)
Issuance of common stock under employee stock purchase plan	22	1		1,119		—		—		1,120
Issuance of common stock upon exercise of stock options	236	3		7,912		—		—		7,915
Stock-based compensation	—	—		11,318		—		—		11,318
Balance, September 30, 2021	139,305	$	1,393	$	1,228,085	$	629,153	$	(20,543)	$	1,838,088

	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
	For the Three Months Ended September 30, 2020
Balance, July 1, 2020	146,445	$	1,464	$	1,174,411	$	566,929	$	(34,179)	$	1,708,625
Net income	—	—		—		111,096		—		111,096
Other comprehensive income	—	—		—		—		6,781		6,781
Purchase and retirement of common stock	(2,110)	(22)		(11,939)		(96,781)		—		(108,742)
Issuance of common stock under employee stock purchase plan	26	1		1,152		—		—		1,153
Issuance of common stock upon exercise of stock options	130	2		4,051		—		—		4,053
Stock-based compensation	—	—		6,467		—		—		6,467
Balance, September 30, 2020	144,491	$	1,445	$	1,174,142	$	581,244	$	(27,398)	$	1,729,433

The accompanying notes are an integral part of these consolidated financial statements.

6

SEI Investments Company

Consolidated Statements of Changes in Equity

(unaudited)

(In thousands)

	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
	For the Nine Months Ended September 30, 2021
Balance, January 1, 2021	143,396	$	1,434	$	1,190,001	$	565,270	$	(16,798)	$	1,739,907
Net income	—	—		—		401,293		—		401,293
Other comprehensive loss	—	—		—		—		(3,745)		(3,745)
Purchase and retirement of common stock	(5,218)	(53)		(30,979)		(285,021)		—		(316,053)
Issuance of common stock under employee stock purchase plan	64	1		3,224		—		—		3,225
Issuance of common stock upon exercise of stock options	1,063	11		34,666		—		—		34,677
Stock-based compensation	—	—		31,173		—		—		31,173
Dividends declared ($0.37 per share)	—	—		—		(52,389)		—		(52,389)
Balance, September 30, 2021	139,305	$	1,393	$	1,228,085	$	629,153	$	(20,543)	$	1,838,088

	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Total Equity
	For the Nine Months Ended September 30, 2020
Balance, January 1, 2020	149,745	$	1,497	$	1,158,900	$	601,885	$	(23,504)	$	1,738,778
Net income	—	—		—		321,404		—		321,404
Other comprehensive loss	—	—		—		—		(3,894)		(3,894)
Purchase and retirement of common stock	(6,185)	(62)		(34,999)		(290,583)		—		(325,644)
Issuance of common stock under employee stock purchase plan	73	1		3,400		—		—		3,401
Issuance of common stock upon exercise of stock options	858	9		26,383		—		—		26,392
Stock-based compensation	—	—		20,458		—		—		20,458
Dividends declared ($0.35 per share)	—	—		—		(51,462)		—		(51,462)
Balance, September 30, 2020	144,491	$	1,445	$	1,174,142	$	581,244	$	(27,398)	$	1,729,433

The accompanying notes are an integral part of these consolidated financial statements.

7

SEI Investments Company

Consolidated Condensed Statements of Cash Flows

(unaudited)

(In thousands)

	Nine Months Ended September 30,
	2021		2020
Cash flows from operating activities:
Net income	$	401,293	$	321,404
Adjustments to reconcile net income to net cash provided by operating activities (See Note 1)	82,588		75,120
Net cash provided by operating activities	483,881		396,524
Cash flows from investing activities:
Additions to property and equipment	(22,520)		(43,113)
Additions to capitalized software	(19,486)		(18,640)
Purchases of marketable securities	(168,333)		(114,407)
Prepayments and maturities of marketable securities	133,895		112,575
Sales of marketable securities	327		842
Other investing activities	(11,425)		(1,500)
Net cash used in investing activities	(87,542)		(64,243)
Cash flows from financing activities:
Payment of contingent consideration	(3,965)		(633)
Purchase and retirement of common stock	(315,811)		(327,079)
Proceeds from issuance of common stock	37,902		29,793
Payment of dividends	(105,516)		(103,914)
Net cash used in financing activities	(387,390)		(401,833)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(2,442)		(4,196)
Net increase (decrease) in cash, cash equivalents and restricted cash	6,507		(73,748)
Cash, cash equivalents and restricted cash, beginning of period	787,727		844,547
Cash, cash equivalents and restricted cash, end of period	$	794,234	$	770,799

The accompanying notes are an integral part of these consolidated financial statements.

8

Notes to Consolidated Financial Statements

(all figures are in thousands except share and per share data)

Note 1.    Summary of Significant Accounting Policies

Nature of Operations

SEI Investments Company (the Company), a Pennsylvania corporation, provides comprehensive platforms, services and infrastructure—encompassing technology, operational, and investment management services—to help wealth managers, financial advisors, investment managers, family offices, institutional and private investors create and manage wealth.

Investment processing platforms provide technologies and business process outsourcing services for wealth managers and investment advisors. These solutions include investment advisory, client relationship, and other technology-enabled capabilities for the front office; administrative and investment services for the middle office; and accounting and processing services for the back office. Revenues from investment processing platforms are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment operations platforms provide business process outsourcing services for investment managers and asset owners. These platforms support a broad range of traditional and alternative investments and provide technology-enabled information analytics and investor capabilities for the front office; administrative and investment services for the middle office; and fund administration and accounting services for the back office. Revenues from investment operations platforms are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment management platforms provide comprehensive solutions for managing personal and institutional wealth. These platforms include goals-based investment strategies; SEI-sponsored investment products, including mutual funds, collective investment products, alternative investment portfolios and separately managed accounts (SMA); and other market-specific advice, technology and operational components. These platforms are offered to wealth managers as part of a complete goals-based investment program for their end-investors. For institutional investors, the Company provides Outsourced Chief Investment Officer (OCIO) solutions that include investment management programs, as well as advisory and administrative services. Revenues from investment management platforms are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Basis of Presentation

The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Certain financial information and accompanying note disclosure normally included in the Company’s Annual Report on Form 10-K have been condensed or omitted. The interim financial information is unaudited but reflects all adjustments (consisting of only normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of financial position of the Company as of September 30, 2021, the results of operations for the three and nine months ended September 30, 2021 and 2020, and cash flows for the nine-months ended September 30, 2021 and 2020. These interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.

There have been no significant changes in significant accounting policies during the nine months ended September 30, 2021 as compared to the significant accounting policies described in the Company's Annual Report on Form 10-K for the year ended December 31, 2020.

Variable Interest Entities

The Company or its affiliates have created numerous investment products for its clients in various types of legal entity structures. The Company serves as the Manager, Administrator and Distributor for these investment products and may also serve as the Trustee for some of the investment products. The Company receives asset management, distribution, administration and custodial fees for these services. Clients are the equity investors and participate in proportion to their ownership percentage in the net income or loss and net capital gains or losses of the products, and, on liquidation, will participate in proportion to their ownership percentage in the remaining net assets of the products after satisfaction of outstanding liabilities. The Company has concluded that it is not the primary beneficiary of the entities and, therefore, is not required to consolidate any of the pooled investment vehicles for which it receives asset management, distribution, administration and custodial fees under the VIE model.

The Company is a party to expense limitation agreements with certain SEI-sponsored money market funds subject to Rule 2a-7 of the Investment Company Act of 1940 which establish a maximum level of ordinary operating expenses incurred by the fund in any fiscal year including, but not limited to, fees of the administrator or its affiliates. Under the terms of these

9

agreements, the Company waived $11,629 and $8,575 in fees during the three months ended September 30, 2021 and 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company waived $33,118 and $24,930, respectively, in fees.

Revenue Recognition

Revenue is recognized when the transfer of control of promised goods or services under the terms of a contract with customers are satisfied in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those promised goods or services. Certain portions of the Company’s revenues involve a third party in providing goods or services to its customers. In such circumstances, the Company must determine whether the nature of its promise to the customer is to provide the underlying goods or services (the Company is the principal in the transaction and reports the transaction gross) or to arrange for a third party to provide the underlying goods or services (the entity is the agent in the transaction and reports the transaction net). See Note 13 for related disclosures regarding revenue recognition.

Cash and Cash Equivalents

Cash and cash equivalents includes $332,657 and $347,082 at September 30, 2021 and December 31, 2020, respectively, primarily invested in SEI-sponsored open-ended money market mutual funds.

Restricted Cash

Restricted cash includes $250 and $3,000 at September 30, 2021 and December 31, 2020, respectively, segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $101 at September 30, 2021 and December 31, 2020 segregated in special reserve accounts for the benefit of customers of the Company’s broker-dealer subsidiary, SEI Investments Distribution Co. (SIDCO), in accordance with certain rules established by the Securities and Exchange Commission (SEC) for broker-dealers.

Capitalized Software

The Company capitalized $19,486 and $18,640 of software development costs during the nine months ended September 30, 2021 and 2020, respectively. The Company's software development costs primarily relate to significant enhancements to the SEI Wealth PlatformSM (SWP). The Company capitalized $19,387 and $17,208 of software development costs for significant enhancements to SWP during the nine months ended September 30, 2021 and 2020, respectively. As of September 30, 2021, the net book value of SWP was $241,262. The net book value includes $22,702 of capitalized software development costs in-progress associated with future releases of SWP. Capitalized software development costs in-progress associated with future releases of SWP were $13,409 as of December 31, 2020. SWP has a weighted average remaining life of 10.0 years. Amortization expense for SWP was $35,834 and $32,576 during the nine months ended September 30, 2021 and 2020, respectively.

Earnings per Share

The calculations of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 are:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net income	$	138,045	$	111,096	$	401,293	$	321,404
Shares used to compute basic earnings per common share	140,507,000		145,812,000		141,928,000		147,586,000
Dilutive effect of stock options	1,919,000		2,095,000		2,053,000		2,372,000
Shares used to compute diluted earnings per common share	142,426,000		147,907,000		143,981,000		149,958,000
Basic earnings per common share	$	0.98	$	0.76	$	2.83	$	2.18
Diluted earnings per common share	$	0.97	$	0.75	$	2.79	$	2.14

During the three months ended September 30, 2021 and 2020, employee stock options to purchase 11,347,000 and 8,813,000 shares of common stock with an average exercise price of $57.80 and $57.98, respectively, were outstanding but not included in the computation of diluted earnings per common share. During the nine months ended September 30, 2021 and 2020, employee stock options to purchase 11,531,000 and 8,342,000 shares of common stock with an average exercise price of $57.78 and $58.18, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three and nine month periods were not included in the computation of diluted earnings per common share because either the performance conditions have not been satisfied or would not have been satisfied if the reporting date was the end of the contingency period or the options' exercise price was greater than

10

the average market price of the Company’s common stock and the effect on diluted earnings per common share would have been anti-dilutive.

Reclassifications

Certain prior year amounts have been reclassified to conform to current year presentation.

Statements of Cash Flows

For purposes of the Consolidated Statements of Cash Flows, the Company considers investment instruments purchased with an original maturity of three months or less to be cash equivalents.

The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the nine months ended September 30:

	2021		2020
Net income	$	401,293	$	321,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	25,141		23,058
Amortization	43,749		39,417
Equity in earnings of unconsolidated affiliate	(103,420)		(86,488)
Distributions received from unconsolidated affiliate	110,559		107,180
Stock-based compensation	31,173		20,458
Provision for losses on receivables	1,569		109
Deferred income tax expense	(6,639)		(7,731)
Net (gain) loss from investments	(134)		1,310
Change in other long-term liabilities	2,103		(4,442)
Change in other assets	314		(965)
Contract costs capitalized, net of amortization	(482)		(2,842)
Other	921		(1,053)
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products	(4,537)		2,521
Receivables	(58,537)		(37,921)
Other current assets	(3,919)		(6,186)
Advances due from unconsolidated affiliate	51,422		12,641
(Decrease) increase in
Accounts payable	3,006		8,615
Accrued liabilities	(9,851)		8,809
Deferred revenue	150		(1,370)
Total adjustments	82,588		75,120
Net cash provided by operating activities	$	483,881	$	396,524

Note 2.    Investment in Unconsolidated Affiliate

LSV Asset Management

The Company has an investment in LSV Asset Management (LSV), a registered investment advisor that provides investment advisory services primarily to institutions, including pension plans and investment companies. LSV is currently an investment sub-advisor for a limited number of SEI-sponsored investment products. The Company's partnership interest in LSV as of September 30, 2021 was 38.7%. The Company accounts for its interest in LSV using the equity method because of its less than 50% ownership. The Company’s interest in the net assets of LSV is reflected in Investment in unconsolidated affiliate on the accompanying Consolidated Balance Sheets and its interest in the earnings of LSV is reflected in Equity in earnings of unconsolidated affiliate on the accompanying Consolidated Statements of Operations.

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At September 30, 2021, the Company’s total investment in LSV was $39,872. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $110,559 and $107,180 in the nine months ended September 30, 2021 and 2020, respectively. As such, the Company considers these distribution payments as returns on investment rather than returns of the Company's original investment in LSV and has therefore classified the associated cash inflows as an operating activity on the Consolidated Statements of Cash Flows.

The Company’s proportionate share in the earnings of LSV was $35,005 and $28,305 during the three months ended September 30, 2021 and 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company's proportionate share in the earnings of LSV was $103,420 and $86,488, respectively.

These tables contain condensed financial information of LSV:

Condensed Statement of Operations	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Revenues	$	115,728	$	94,902	$	342,957	$	289,546
Net income	90,365		70,440		266,805		220,184

Condensed Balance Sheets	September 30, 2021		December 31, 2020
Current assets	$	123,325	$	151,515
Non-current assets	4,426		4,296
Total assets	$	127,751	$	155,811
Current liabilities	$	69,349	$	77,077
Non-current liabilities	4,058		4,620
Partners’ capital	54,344		74,114
Total liabilities and partners’ capital	$	127,751	$	155,811

On April 1, 2021, LSV provided an interest in the partnership to select key employees which reduced the ownership percentage of each existing partner on a pro-rata basis. As a result, the Company's total partnership interest in LSV was reduced slightly to approximately 38.7% from approximately 38.8%.

Note 3.    Composition of Certain Financial Statement Captions

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	September 30, 2021		December 31, 2020
Trade receivables	$	112,572	$	99,106
Fees earned, not billed	313,883		262,167
Other receivables	18,401		25,046
	444,856		386,319
Less: Allowance for doubtful accounts	(2,669)		(1,100)
	$	442,187	$	385,219

Fees earned, not billed represents receivables from contracts with customers earned but unbilled and results from timing differences between services provided and contractual billing schedules. These billing schedules generally provide for fees to be billed on a quarterly basis. In addition, certain fees earned from investment operations services are calculated based on assets under administration that have an extended valuation process. Billings to these clients occur once the asset valuation processes are completed.

Receivables from investment products on the accompanying Consolidated Balance Sheets primarily represent fees receivable for distribution, investment advisory, and administration services to various regulated investment companies and other investment products sponsored by SEI.

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Property and Equipment

Property and Equipment on the accompanying Consolidated Balance Sheets consists of:

	September 30, 2021		December 31, 2020
Buildings	$	209,315	$	206,151
Equipment	150,945		141,820
Land	24,651		24,179
Purchased software	156,327		147,838
Furniture and fixtures	21,196		21,439
Leasehold improvements	21,838		21,604
Construction in progress	209		4,660
	584,481		567,691
Less: Accumulated depreciation	(400,679)		(378,639)
Property and Equipment, net	$	183,802	$	189,052

The Company recognized $25,141 and $23,058 in depreciation expense related to property and equipment for the nine months ended September 30, 2021 and 2020, respectively.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $34,263 and $33,781 as of September 30, 2021 and December 31, 2020, respectively. The Company deferred expenses related to contract costs of $2,932 and $2,521 during the three months ended September 30, 2021 and 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company deferred expenses related to contract costs of $6,978 and $7,270, respectively. Amortization expense related to deferred contract costs were $6,496 and $4,428 during the nine months ended September 30, 2021 and 2020, respectively, and are included in Compensation, benefits and other personnel on the accompanying Consolidated Statements of Operations. There was no impairment loss in relation to deferred contract costs during the nine months ended September 30, 2021.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	September 30, 2021		December 31, 2020
Accrued employee compensation	$	86,924	$	95,656
Accrued employee benefits and other personnel	11,743		18,770
Accrued consulting, outsourcing and professional fees	35,945		31,907
Accrued sub-advisory, distribution and other asset management fees	57,560		49,924
Accrued dividend payable	—		53,127
Other accrued liabilities	38,871		50,461
Total accrued liabilities	$	231,043	$	299,845

Note 4.    Fair Value Measurements

The fair value of the Company’s financial assets and liabilities, except for the Company's investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the Company’s Level 1 financial assets consist mainly of investments in open-ended mutual funds that are quoted daily. Level 2 financial assets consist of GNMA mortgage-backed securities held by the Company's wholly-owned limited purpose federal thrift subsidiary, SEI Private Trust Company (SPTC), Federal Home Loan Bank (FHLB) and other U.S. government agency short-term notes held by SIDCO. The financial assets held by SIDCO were purchased as part of a cash management program requiring only short term, top-tier investment grade government and corporate securities. The financial assets held by SPTC are debt securities issued by GNMA and are backed by the full faith and credit of the U.S. government. These securities were purchased for the sole purpose of satisfying applicable regulatory requirements and have maturity dates which range from 2023 to 2041.

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived

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from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

The valuation of the Company's Level 2 financial assets held by SIDCO and SPTC are based upon securities pricing policies and procedures utilized by third-party pricing vendors.

The pricing policies and procedures applied for our Level 1 and Level 2 financial assets during the nine months ended September 30, 2021 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2020. The Company had no Level 3 financial assets at September 30, 2021 or December 31, 2020 that were required to be measured at fair value on a recurring basis. Level 3 financial liabilities at September 30, 2021 and December 31, 2020 consist entirely of the estimated contingent consideration resulting from an acquisition (See Note 12). The fair value of the contingent consideration was determined using a Monte-Carlo simulation model. Key assumptions for the Monte-Carlo simulation model include expected revenues, expected volatility, risk-free rate and other factors. There were no transfers of financial assets between levels within the fair value hierarchy during the nine months ended September 30, 2021.

The fair value of certain financial assets of the Company was determined using the following inputs:

			Fair Value Measurements at the End of the Reporting Period Using
Assets	September 30, 2021		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	12,241	$	12,241	$	—
Available-for-sale debt securities	127,838		—		127,838
Fixed-income securities owned	31,770		—		31,770
Investment funds sponsored by LSV (1)	6,893
	$	178,742	$	12,241	$	159,608

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2020		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	12,142	$	12,142	$	—
Available-for-sale debt securities	93,277		—		93,277
Fixed-income securities owned	34,064		—		34,064
Investment funds sponsored by LSV (1)	6,166
	$	145,649	$	12,142	$	127,341

(1) The fair value amounts presented in the tables above are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the accompanying Consolidated Balance Sheets (See Note 5).

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Note 5.    Marketable Securities

Marketable securities include investments in money market funds and commercial paper classified as cash equivalents, available-for-sale debt securities, investments in SEI-sponsored and non-SEI-sponsored mutual funds, equities, investments in funds sponsored by LSV and securities owned by SIDCO.

Cash Equivalents

Investments in money market funds and commercial paper classified as cash equivalents had a fair value of $453,628 and $462,624 at September 30, 2021 and December 31, 2020, respectively. There were no material unrealized or realized gains or losses from these investments during the nine months ended September 30, 2021 and 2020. Investments in money market funds and commercial paper are Level 1 assets.

Available for Sale and Equity Securities

Available For Sale and Equity Securities on the accompanying Consolidated Balance Sheets consist of: 

	At September 30, 2021
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	126,964	$	874	$	—	$	127,838
SEI-sponsored mutual funds	6,692		380		—		7,072
Equities and other mutual funds	4,932		237		—		5,169
	$	138,588	$	1,491	$	—	$	140,079

	At December 31, 2020
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	91,262	$	2,015	$	—	$	93,277
SEI-sponsored mutual funds	6,866		382		—		7,248
Equities and other mutual funds	4,421		473		—		4,894
	$	102,549	$	2,870	$	—	$	105,419

Net unrealized gains at September 30, 2021 of available-for-sale debt securities were $673 (net of income tax expense of $201). Net unrealized gains at December 31, 2020 of available-for-sale debt securities were $1,551 (net of income tax expense of $464). These net unrealized gains are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

There were gross realized losses of $861 and $582 from available-for-sale debt securities during the nine months ended September 30, 2021 and 2020, respectively. There were no gross realized gains from available-for-sale debt securities during the nine months ended September 30, 2021 and 2020. Realized losses from available-for-sale debt securities, including amounts reclassified from accumulated comprehensive loss, are reflected in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

There were gross realized gains of $714 and gross realized losses of $65 from mutual funds and equities during the nine months ended September 30, 2021. There were gross realized gains of $254 and gross realized losses of $250 from mutual funds and equities during the nine months ended September 30, 2020. Gains and losses from mutual funds and equities are reflected in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

Investments in Affiliated Funds

The Company has an investment in funds sponsored by LSV. The Company records this investment on the accompanying Consolidated Balance Sheets at fair value. Unrealized gains and losses from the change in fair value of these funds are recognized in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

The funds had a fair value of $6,893 and $6,166 at September 30, 2021 and December 31, 2020, respectively. The Company recognized unrealized losses of $39 and unrealized gains of $458 during the three months ended September 30, 2021 and 2020, respectively, from the change in fair value of the funds. The Company recognized unrealized gains of $727 and unrealized losses of $781 during the nine months ended September 30, 2021 and 2020, respectively, from the change in fair value of the funds.

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Securities Owned

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency securities with maturity dates less than one year. These investments are reflected as Securities owned on the accompanying Consolidated Balance Sheets. Due to specialized accounting practices applicable to investments by broker-dealers, the securities are reported at fair value and changes in fair value are recorded in current period earnings. The securities had a fair value of $31,770 and $34,064 at September 30, 2021 and December 31, 2020, respectively. There were no material net gains or losses related to the securities during the three and nine months ended September 30, 2021 and 2020.

Note 6.    Line of Credit

On April 23, 2021 (the Closing Date), the Company entered into a new five-year $325,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, N.A., and a syndicate of other lenders. The Credit Facility became available on the Closing Date and replaced the former credit facility agreement (the 2016 Credit Facility). The Credit Facility is scheduled to expire in April 2026, at which time any aggregate principal amount of loans outstanding becomes payable in full. Any borrowings made under the Credit Facility will accrue interest at rates that, at the Company's option, are based on a base rate (the Base Rate) plus a premium that can range from 0.25% to 1.00% or the London InterBank Offered Rate (LIBOR) plus a premium that can range from 1.25% to 2.00% depending on the Company’s Leverage Ratio (a ratio of consolidated indebtedness to consolidated EBITDA for the four preceding fiscal quarters, all as defined in the related agreement). The Base Rate is defined as the highest of a) the Federal Funds Rate, as published by the Federal Reserve Bank of New York, plus 0.50%, b) the prime commercial lending rate of Wells Fargo, c) the applicable LIBOR plus 1.00%, or d) 0%. The Credit Facility includes fallback language clearly defining an alternative reference rate which provides for specified replacement rates upon a LIBOR cessation event. At the time of a LIBOR cessation event, the replacement rate, the Secured Overnight Financing Rate (SOFR), self-executes without the need for negotiations or a formal amendment process.

The Company also pays quarterly commitment fees based on the unused portion of the Credit Facility. The quarterly fees for the Credit Facility can range from 0.15% of the amount of the unused portion to 0.30%, depending on the Company’s Leverage Ratio. Certain wholly-owned subsidiaries of the Company have guaranteed the obligations of the Company under the agreement. The aggregate amount of the Credit Facility may be increased by an additional $100,000 under certain conditions set forth in the agreement. The Company may issue up to $15,000 in letters of credit under the terms of the Credit Facility. The Company pays a periodic commission fee of 1.25% plus an issuance fee of 0.200% of the aggregate face amount of the outstanding letters of credit issued under the Credit Facility.

The Credit Facility contains covenants with restrictions on the ability of the Company to do transactions with affiliates other than wholly-owned subsidiaries or to incur liens or certain types of indebtedness as defined in the agreement. In the event of a default under the Credit Facility, the Company would also be restricted from paying dividends on, or repurchasing, its common stock without the approval of the lenders. Upon the occurrence of certain financial or economic events, significant corporate events, or certain other events of default constituting an event of default under the Credit Facility, all loans outstanding may be declared immediately due and payable and all commitments under the agreement may be terminated.

As of September 30, 2021, the Company had outstanding letters of credit of $5,808 under the Credit Facility. These letters of credit were issued primarily for the expansion of the Company's headquarters and are scheduled to expire during 2021. The amount of the Credit Facility that is available for general corporate purposes as of September 30, 2021 was $319,192.

The Company was in compliance with all covenants of the credit facilities during the nine months ended September 30, 2021.

Note 7.    Shareholders’ Equity

Stock-Based Compensation

The Company has only non-qualified stock options outstanding under its equity compensation plans. All outstanding stock options have performance-based vesting provisions specific to each option grant that tie the vesting of the applicable stock options to the Company’s financial performance. The Company’s stock options vest at a rate of 50% when a specified financial vesting target is achieved, and the remaining 50% when a second, higher specified financial vesting target is achieved. Options vest as a result of achievement of the financial vesting targets. Options granted in December 2017 and thereafter include a service condition which requires a minimum two or four year waiting period from the grant date along with the attainment of the applicable financial vesting target. The targets are measured annually on December 31. The amount of stock-based compensation expense recognized in the period is based upon management’s

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estimate of when the financial vesting targets may be achieved. Any change in management’s estimate could result in the remaining amount of stock-based compensation expense to be accelerated, spread out over a longer period, or reversed. This may cause volatility in the recognition of stock-based compensation expense in future periods and could materially affect the Company’s earnings.

The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three and nine months ended September 30, 2021 and 2020, respectively, as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Stock-based compensation expense	$	11,318	$	6,467	$	31,173	$	20,458
Less: Deferred tax benefit	(1,857)		(1,229)		(5,615)		(3,932)
Stock-based compensation expense, net of tax	$	9,461	$	5,238	$	25,558	$	16,526

The Company revised its estimates of when some vesting targets are expected to be achieved during 2021 and 2020. The change in management's estimate during the nine months ended September 30, 2021 resulted in an increase of $3,209 in stock-based compensation expense. The change in estimate during the nine months ended September 30, 2020 did not result in a material change to the Company's stock-based compensation expense.

As of September 30, 2021, there was approximately $72,399 of unrecognized compensation cost remaining related to unvested employee stock options that management expects will vest and is being amortized.

The Company issues new common shares associated with the exercise of stock options. The total intrinsic value of options exercised during the nine months ended September 30, 2021 was $30,496. The total options exercisable as of September 30, 2021 had an intrinsic value of $104,146. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of September 30, 2021 and the weighted average exercise price of the options. The market value of the Company’s common stock as of September 30, 2021 was $59.30 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of September 30, 2021 was $40.63. Total options that were outstanding as of September 30, 2021 were 16,925,000. Total options that were exercisable as of September 30, 2021 were 5,578,000.

Common Stock Buyback

The Company’s Board of Directors, under multiple authorizations, has authorized the repurchase of common stock on the open market or through private transactions. The Company purchased 5,218,000 shares at a total cost of $316,053 during the nine months ended September 30, 2021, which reduced the total shares outstanding of common stock. The cost of stock purchases during the period includes the cost of certain transactions that settled in the following quarter. As of September 30, 2021, the Company had approximately $126,775 of authorization remaining for the purchase of common stock under the program.

The Company immediately retires its common stock when purchased. Upon retirement, the Company reduces Capital in excess of par value for the average capital per share outstanding and the remainder is charged against Retained earnings. If the Company reduces its Retained earnings to zero, any subsequent purchases of common stock will be charged entirely to Capital in excess of par value.

Cash Dividend

On June 2, 2021, the Board of Directors declared a cash dividend of $0.37 per share on the Company's common stock, which was paid on June 22, 2021, to shareholders of record on June 14, 2021. Cash dividends declared during the nine months ended September 30, 2021 and 2020 were $52,389 and $51,462, respectively.

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Note 8.    Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss, net of tax, are as follows: 

	Foreign Currency Translation Adjustments		Unrealized Gains (Losses) on Investments		Accumulated Other Comprehensive Loss
Balance, January 1, 2021	$	(18,349)	$	1,551	$	(16,798)
Other comprehensive loss before reclassifications	(2,867)		(1,548)		(4,415)
Amounts reclassified from accumulated other comprehensive loss	—		670		670
Net current-period other comprehensive loss	(2,867)		(878)		(3,745)
Balance, September 30, 2021	$	(21,216)	$	673	$	(20,543)

Note 9.    Business Segment Information

The Company’s reportable business segments are:

Private Banks – Provides outsourced investment processing and investment management platforms to banks and trust institutions, independent wealth advisers and financial advisors worldwide;

Investment Advisors – Provides investment management and investment processing platforms to affluent investors through a network of independent registered investment advisors, financial planners and other investment professionals in the United States;

Institutional Investors – Provides OCIO solutions, including investment management and administrative outsourcing platforms to retirement plan sponsors, healthcare systems, higher education and other not-for-profit organizations worldwide;

Investment Managers – Provides investment operations outsourcing platforms to fund companies, banking institutions, traditional and non-traditional investment managers worldwide and family offices in the United States; and

Investments in New Businesses – Focuses on providing investment management solutions to ultra-high-net-worth families residing in the United States; developing network and data protection services; modularizing larger technology platforms into stand-alone components; entering new markets; and conducting other research and development activities.

The information in the following tables is derived from internal financial reporting used for corporate management purposes. There are no inter-segment revenues for the three and nine months ended September 30, 2021 and 2020. Management evaluates Company assets on a consolidated basis during interim periods. The accounting policies of the reportable business segments are the same as those described in Note 1 to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.

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The following tables highlight certain financial information about each of the business segments for the three months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2021
Revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322
Expenses	116,679		62,107		41,643		89,594		12,820		322,843
Operating profit (loss)	$	6,339	$	62,661	$	44,116	$	57,818	$	(8,455)	$	162,479

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2020
Revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927
Expenses	113,066		51,519		37,812		79,838		13,315		295,550
Operating profit (loss)	$	1,726	$	51,670	$	41,771	$	44,008	$	(9,798)	$	129,377

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the three months ended September 30, 2021 and 2020 is as follows:

	2021		2020
Total operating profit from segments	$	162,479	$	129,377
Corporate overhead expenses	(21,354)		(18,040)
Income from operations	$	141,125	$	111,337

The following tables provide additional information for the three months ended September 30, 2021 and 2020 pertaining to the business segments:

	Capital Expenditures (1)				Depreciation
	2021		2020		2021		2020
Private Banks	$	6,173	$	7,652	$	4,980	$	4,222
Investment Advisors	2,896		3,234		499		1,255
Institutional Investors	720		698		271		298
Investment Managers	3,722		2,776		2,428		1,818
Investments in New Businesses	336		144		60		97
Total from business segments	$	13,847	$	14,504	$	8,238	$	7,690
Corporate overhead	419		274		170		255
	$	14,266	$	14,778	$	8,408	$	7,945

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2021		2020
Private Banks	$	8,526	$	7,505
Investment Advisors	3,014		2,683
Institutional Investors	427		426
Investment Managers	2,451		2,343
Investments in New Businesses	185		186
Total from business segments	$	14,603	$	13,143
Corporate overhead	71		57
	$	14,674	$	13,200

The following tables highlight certain financial information about each of business segment for the nine months ended September 30, 2021 and 2020:

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	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2021
Revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659
Expenses	345,057		176,267		122,696		257,609		39,855		941,484
Operating profit (loss)	$	19,245	$	181,191	$	133,261	$	169,030	$	(27,552)	$	475,175

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2020
Revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335
Expenses	331,442		154,100		113,016		228,795		37,691		865,044
Operating profit (loss)	$	4,297	$	145,118	$	122,293	$	131,020	$	(27,437)	$	375,291

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the nine months ended September 30, 2021 and 2020:

	2021		2020
Total operating profit from segments	$	475,175	$	375,291
Corporate overhead expenses	(65,192)		(53,414)
Income from operations	$	409,983	$	321,877

The following tables provide additional information for the nine months ended September 30, 2021 and 2020:

	Capital Expenditures (1)				Depreciation
	2021		2020		2021		2020
Private Banks	$	20,596	$	24,211	$	13,290	$	12,069
Investment Advisors	8,784		12,427		3,205		3,578
Institutional Investors	2,115		3,085		982		901
Investment Managers	8,726		19,067		6,508		5,499
Investments in New Businesses	788		894		306		243
Total from business segments	$	41,009	$	59,684	$	24,291	$	22,290
Corporate Overhead	997		2,069		850		768
	$	42,006	$	61,753	$	25,141	$	23,058

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2021		2020
Private Banks	$	25,735	$	22,390
Investment Advisors	8,550		7,999
Institutional Investors	1,280		1,280
Investment Managers	7,375		7,020
Investments in New Businesses	555		556
Total from business segments	$	43,495	$	39,245
Corporate Overhead	254		172
	$	43,749	$	39,417

Note 10.    Income Taxes

The gross liability for unrecognized tax benefits at September 30, 2021 and December 31, 2020 was $16,721 and $15,911, respectively, exclusive of interest and penalties, of which $16,532 and $15,761 would affect the effective tax rate if the Company were to recognize the tax benefit.

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The Company classifies interest and penalties on unrecognized tax benefits as income tax expense. As of September 30, 2021 and December 31, 2020, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $1,835 and $2,105, respectively.

	September 30, 2021		December 31, 2020
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	16,721	$	15,911
Interest and penalties on unrecognized benefits	1,835		2,105
Total gross uncertain tax positions	$	18,556	$	18,016
Amount included in Current liabilities	$	4,497	$	6,546
Amount included in Other long-term liabilities	14,059		11,470
	$	18,556	$	18,016

The effective income tax rate for the three and nine months ended September 30, 2021 and 2020 differs from the federal income tax statutory rate due to the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Statutory rate	21.0	%	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.5		3.3		3.0		3.2
Foreign tax expense and tax rate differential	(0.1)		(0.2)		(0.1)		(0.1)
Tax benefit from stock option exercises	(0.6)		(0.4)		(1.0)		(1.0)
Expiration of the statute of limitations	—		(1.3)		—		(0.5)
State settlements	(0.3)		—		(0.2)		—
Provision-to-return adjustment	(0.5)		(0.4)		(0.2)		(0.1)
Other, net	(0.3)		(0.6)		(0.3)		(0.5)
	21.7	%	21.4	%	22.2	%	22.0	%

The Company files income tax returns in the United States on a consolidated basis and in many U.S. state and foreign jurisdictions. The Company is subject to examination of income tax returns by the Internal Revenue Service (IRS) and other domestic and foreign tax authorities. The Company is no longer subject to U.S. federal income tax examination for years before 2017 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2015.

The Company estimates it will recognize $4,497 of gross unrecognized tax benefits. This amount is expected to be paid within one year or to be removed at the expiration of the statute of limitations and resolution of income tax audits and is netted against the current payable account. These unrecognized tax benefits are related to tax positions taken on certain federal, state, and foreign tax returns. However, the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year. While it is reasonably possible that some issues under examination could be resolved in the next twelve months, based upon the current facts and circumstances, the Company cannot reasonably estimate the timing of such resolution or the total range of potential changes as it relates to the current unrecognized tax benefits that are recorded as part of the Company’s financial statements.

Note 11.    Commitments and Contingencies

In the ordinary course of business, the Company from time to time enters into contracts containing indemnification obligations of the Company. These obligations may require the Company to make payments to another party upon the occurrence of certain events including the failure by the Company to meet its performance obligations under the contract. These contractual indemnification provisions are often standard contractual terms of the nature customarily found in the type of contracts entered into by the Company. In many cases, there are no stated or notional amounts included in the indemnification provisions. There are no amounts reflected on the Consolidated Balance Sheets as of September 30, 2021 and December 31, 2020 related to these indemnifications.

Stanford Trust Company Litigation

SEI has been named in seven lawsuits filed in Louisiana courts; four of the cases also name SPTC as a defendant. The underlying allegations in all actions relate to the purported role of SPTC in providing back-office services to Stanford Trust

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Company. The complaints allege that SEI and SPTC participated in some manner in the sale of “certificates of deposit” issued by Stanford International Bank so as to be a “seller” of the certificates of deposit for purposes of primary liability under the Louisiana Securities Law or so as to be secondarily liable under that statute for sales of certificates of deposit made by Stanford Trust Company. Two of the actions also include claims for violations of the Louisiana Racketeering Act and possibly conspiracy, and a third also asserts claims of negligence, breach of contract, breach of fiduciary duty, violations of the uniform fiduciaries law, negligent misrepresentation, detrimental reliance, violations of the Louisiana Racketeering Act, and conspiracy.

The procedural status of the seven cases varies. The Lillie case, filed originally in the 19th Judicial District Court for the Parish of East Baton Rouge, was brought as a class action. A group of plaintiffs who opted out of the Lillie class filed a complaint against SEI and SPTC in the United States District Court in the Middle District of Louisiana, alleging claims essentially the same as those in Lillie. In both cases, as a result of the proceedings in the Northern District of Texas, only the plaintiffs’ secondary liability claims under Section 714(B) of the Louisiana Securities Law remain. On January 31, 2019, the Judicial Panel on Multidistrict Litigation remanded the Lillie and Ahders proceedings to the Middle District of Louisiana.

With respect to the Lillie proceeding, on July 9, 2019, the District Court issued an order granting SEI’s Summary Judgment Motion to dismiss the remaining Section 714(B) claim and denying Plaintiffs’ Motion for Continuance of SEI and SPTC’s Motion for Summary Judgment pursuant to Rule 56(d). On August 27, 2019, Plaintiffs-Appellants filed a Notice of Appeal to the United States Court of Appeals for the Fifth Circuit of the District Court's dismissal of the Lillie matter. On May 14, 2021, the United States Court of Appeals for the Fifth Circuit unanimously affirmed the District Court’s order granting summary judgment in favor SEI and the Insurer Defendants in the Lillie matter.

With respect to the Ahders proceeding, on January 24, 2020, the District Court issued an order granting SEI’s Summary Judgment Motion to dismiss the remaining Section 714(B) claim. On March 17, 2020, Plaintiffs-Appellants filed a Notice of Appeal to the United States Court of Appeals for the Fifth Circuit of the District Court's dismissal of the Ahders matter. On December 3, 2020, the United States Court of Appeals for the Fifth Circuit unanimously affirmed the District Court’s order granting summary judgment in favor of SEI and the Insurer Defendants in the Adhers matter.

Another case, filed in the 23rd Judicial District Court for the Parish of Ascension, also was removed to federal court and transferred by the Judicial Panel on Multidistrict Litigation to the Northern District of Texas and the Stanford MDL. The schedule for responding to that Complaint has not yet been established.

Two additional cases remain in the Parish of East Baton Rouge. Plaintiffs filed petitions in 2010 and have granted SEI and SPTC indefinite extensions to respond. No material activity has taken place since.

In two additional cases, filed in East Baton Rouge and brought by the same counsel who filed the Lillie action, virtually all of the litigation to date has involved motions practice and appellate litigation regarding the existence of federal subject matter jurisdiction under the federal Securities Litigation Uniform Standards Act (SLUSA). The matters were removed to the United States District Court for the Northern District of Texas and consolidated. The court then dismissed the action under SLUSA. The Court of Appeals for the Fifth Circuit reversed that order, and the Supreme Court of the United States affirmed the Court of Appeals judgment on February 26, 2014. The matters were remanded to state court and no material activity has taken place since that date.

While the outcome of this litigation remains uncertain, SEI and SPTC believe that they have valid defenses to plaintiffs' claims and intend to defend the lawsuits vigorously. Because of uncertainty in the make-up of the Lillie class, the specific theories of liability that may survive a motion for summary judgment or other dispositive motion, the relative lack of discovery regarding damages, causation, mitigation and other aspects that may ultimately bear upon loss, the Company is not reasonably able to provide an estimate of loss, if any, with respect to the foregoing lawsuits.

SS&C Advent Matter

On February 28, 2020, SEI Global Services, Inc. (SGSI), a wholly-owned subsidiary of the Company, filed a complaint under seal in the United States District Court for the Eastern District of Pennsylvania against SS&C Advent (Advent) and SS&C Technologies Holdings, Inc. (SS&C) alleging that SS&C and Advent breached the terms of the contract between the parties and asking the Court to hold SS&C and Advent to their bargained-for obligations (the Advent Matter). In addition to Breach of Contract, the complaint also includes counts for Declaratory Judgment, Tortious Interference with Existing and Prospective Contractual Relations, Violation of the New York General Business Law Section 349, Violations of Section 2 of the Sherman Antitrust Act, Promissory Estoppel and Breach of the Covenant of Good Faith and Fair Dealing. SGSI seeks various forms of relief, including declaratory judgment, specific performance under the contract, and monetary damages, including treble damages and attorney’s fees.

Following various procedural actions, including an amendment of SGSI’s complaint to include additional breach of contract claims, Advent filed a motion to dismiss SGSI’s complaint.

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On October 23, 2020, the United States District Court for the Eastern District of Pennsylvania dismissed SEI’s federal antitrust claims and declined to rule on the state law claims on the basis that in the absence of the anti-trust claim, the court had no jurisdiction over the state law claims. SGSI has appealed the dismissal of the federal anti-trust claims to the Third Circuit Court of Appeals, which is currently pending.

Since October 23, 2020, Advent and SGSI have been litigating the remaining breach of contract and tortious interference with contract claims in New York State Court. Additionally, SGSI made motions for injunctive relief to insure that Advent provided SGSI with access to the Geneva, Moxy and APX software modules as SGSI believes is required pursuant to the terms of a valid contract. On January 13, 2021, Judge Borrok of the Supreme Court of the State of New York, granted SGSI’s motion for injunctive relief and issued an Order in which he characterized the basis for Advent’s claim for breach of contract as appearing to be “pre-textual” and found that SGSI’s claims for breach of contract would likely succeed on the merits. Judge Borrok granted SGSI’s motion for injunctive relief, on a preliminary basis, and precluded SS&C Advent from:

•    Dishonoring their contractual obligations and commitments under the SLSA, including, denying SEI’s licenses, rights, and privileges under the SLSA;

•    Failing to provide new license keys for the license keys due to Geneva, Moxy, and APX, and other software products licensed by SEI pursuant to the SLSA (such new license keys to be provided no later than January 15, 2021 at 10 A.M.);

•    Denying to SEI any and all access to the Geneva, Moxy, and APX software and related modules as are reasonably necessary to provide access to such software to SEI’s clients; and

•    Denying to SEI any and all support, maintenance and technical support services for Geneva, Moxy, and APX.

SS&C Advent provided SEI with the necessary access to the Geneva, Moxy and APX software modules on January 14, 2021. These have been tested, verified and are now running in the SEI production environment.

On January 15, 2021, SS&C Advent appealed Judge Borrok’s order granting SEI’s motion for preliminary injunctive relief to the Appellate Division of the Supreme Court of the State of New York, First Department. The Appellate Division affirmed the injunction order on June 15, 2021.

On March 1, 2021, SS&C Advent moved to dismiss SGSI’s breach of contract and tortious interference with contract counter claims. These counter-claims were:

1.breach of contract,

2.declaratory judgment,

3.tortious interference with existing and prospective contractual relations,

4.deceptive trade practices in violation of NY Statutes,

5.breach of the covenant of good faith and fair dealing, and

6.promissory estoppel.

The parties agreed to toll the litigation while endeavoring to resolve their dispute through a settlement mediation process moderated by Judge Borrock. The parties were unable to reach an agreement as to a settlement of the litigation and reengaged in the litigation process.

On October 5, 2021, Judge Borrock issued an order partially denying and partially granting SS&C’s Advent’s motion to dismiss SGSI’s breach of contract and tortious interference with contract counter claims.

Judge Borrock dismissed the third claim with respect to prospective contractual relationships only, as well as the fourth claim and the sixth claim. The remaining claims that will proceed are:

1.breach of contract,

2.declaratory judgment,

3.tortious interference with existing a contractual relations, and

4.breach of the covenant of good faith and fair dealing.

We expect that the parties will also reengage with respect to SGSI’s pending appeal in the Third Circuit of the dismissal of SGSI’s anti-trust-claims.

SEI continues to believe that it will have to change providers under the current terms of its contract with SS&C Advent and that the process of litigating its rights under this contract may be a multi-year process. Consequently, SEI does not believe

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that the Advent Matter will create any consequence to the services SGSI provides to its clients in the near term. SEI believes that it has alternatives available to it that will enable it to continue to provide currently provided services to its clients in all material respects in the unlikely event that there ultimately is a negative outcome in the Advent Matter.

SEI believes SGSI has a strong basis for proving the actions it alleges in the Advent Matter and looks forward to the opportunity to continue to assert its rights under contract and prove the damages that it has suffered as a consequence of the behavior by SS&C Advent that SGSI alleges. SEI expects the financial impact of litigating the Advent Matter to be immaterial.

Other Matters

The Company and certain of its subsidiaries are party to various other examinations, investigations, actions and claims arising in the normal course of business that the Company does not believe are material. The Company believes that the ultimate resolution of these matters will not have a material adverse effect on the Company's financial position or the manner in which the Company conducts its business. Currently, the Company does not believe the amount of losses associated with these matters can be estimated. While the Company does not believe that the amount of such losses will, when liquidated or estimable, be material to its financial position, the assumptions may be incorrect and any such loss could have a material adverse effect on the Company's results of operations or the manner in which the Company conducts its business in the period(s) during which the underlying matters are resolved.

Note 12.    Goodwill and Intangible Assets

On April 2, 2018, the Company acquired all ownership interests of Huntington Steele, LLC (Huntington Steele). The total purchase price was allocated to Huntington Steele’s net tangible and intangible assets based upon their estimated fair values at the date of purchase. The excess purchase price over the value of the identifiable intangible assets was recorded as goodwill. The total amount of goodwill from this transaction amounted to $11,499 and is included on the accompanying Consolidated Balance Sheets. The total purchase price for Huntington Steele included a contingent purchase price payable to the sellers upon the attainment of specified financial measures determined at various intervals occurring between 2019 and 2023. The Company made payments of $3,965 and $633 during the nine months ended September 30, 2021 and 2020, respectively, to the sellers. As of September 30, 2021, the current portion of the contingent consideration of $765 is included in Accrued liabilities on the accompanying Balance Sheet. The long-term portion of the contingent consideration of $8,099 is included in Other long-term liabilities on the accompanying Balance Sheet.

In July 2017, the Company acquired all ownership interests of Archway Technology Partners, LLC, Archway Finance & Operations, Inc. and Keystone Capital Holdings, LLC (collectively, Archway), a provider of operating technologies and services to the family office industry. The total purchase price was allocated to Archway’s net tangible and intangible assets based upon their estimated fair values at the date of purchase. The excess purchase price over the value of the net tangible and identifiable intangible assets was recorded as goodwill. The total amount of goodwill from this transaction amounted to $52,990 and is included on the accompanying Consolidated Balance Sheets.

There were no changes to goodwill during the nine months ended September 30, 2021.

The Company recognized $2,763 of amortization expense related to the intangible assets acquired through acquisitions of Huntington Steele and Archway during the nine months ended September 30, 2021 and 2020.

Note 13.    Revenues from Contracts with Customers

The Company’s principal sources of revenues are: (1) asset management, administration and distribution fees primarily earned based upon a contractual percentage of net assets under management or administration; and (2) information processing and software servicing fees that are either recurring and primarily earned based upon the number of trust accounts being serviced or a percentage of the market value of the clients' assets processed on the Company's platforms, or non-recurring and based upon project-oriented contractual agreements related to client implementations.

Disaggregation of Revenue

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the business segments for the three months ended September 30, 2021 and 2020:

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	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2021
Investment management fees from pooled investment products	$	34,212	$	77,123	$	13,639	$	32	$	338	$	125,344
Investment management fees from investment management agreements	605		41,688		71,964		—		3,864		118,121
Investment operations fees	363		—		—		136,978		—		137,341
Investment processing fees - PaaS	54,191		—		—		—		—		54,191
Investment processing fees - SaaS	28,579		—		—		3,848		—		32,427
Professional services fees	4,174		—		—		871		—		5,045
Account fees and other	894		5,957		156		5,683		163		12,853
Total revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322
Primary Geographic Markets:
United States	$	77,260	$	124,768	$	68,810	$	136,934	$	4,365	$	412,137
United Kingdom	28,767		—		13,327		—		—		42,094
Canada	12,343		—		926		—		—		13,269
Ireland	4,648		—		2,570		10,478		—		17,696
Other	—		—		126		—		—		126
Total revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2020
Investment management fees from pooled investment products	$	32,256	$	68,287	$	13,417	$	180	$	356	$	114,496
Investment management fees from investment management agreements	421		29,761		65,811		—		3,041		99,034
Investment operations fees	446		—		—		113,037		—		113,483
Investment processing fees - PaaS	47,393		—		—		—		—		47,393
Investment processing fees - SaaS	27,567		—		—		3,479		—		31,046
Professional services fees	5,663		—		—		2,016		—		7,679
Account fees and other	1,046		5,141		355		5,134		120		11,796
Total revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927
Primary Geographic Markets:
United States	$	74,633	$	103,189	$	62,699	$	116,196	$	3,517	$	360,234
United Kingdom	25,234		—		12,930		—		—		38,164
Canada	10,596		—		1,298		—		—		11,894
Ireland	4,329		—		2,526		7,650		—		14,505
Other	—		—		130		—		—		130
Total revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the nine months ended September 30, 2021 and 2020:

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	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2021
Investment management fees from pooled investment products	$	100,484	$	224,816	$	41,365	$	105	$	993	$	367,763
Investment management fees from investment management agreements	1,681		114,747		213,249		—		10,811		340,488
Investment operations fees	1,134		—		—		394,401		—		395,535
Investment processing fees - PaaS	160,813		—		—		—		—		160,813
Investment processing fees - SaaS	84,831		—		—		11,409		—		96,240
Professional services fees	12,509		—		—		2,885		—		15,394
Account fees and other	2,850		17,895		1,343		17,839		499		40,426
Total revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659
Primary Geographic Markets:
United States	$	231,203	$	357,458	$	203,322	$	396,598	$	12,303	$	1,200,884
United Kingdom	83,514		—		41,091		—		—		124,605
Canada	35,977		—		3,426		—		—		39,403
Ireland	13,608		—		7,735		30,041		—		51,384
Other	—		—		383		—		—		383
Total revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2020
Investment management fees from pooled investment products	$	95,407	$	200,718	$	39,628	$	536	$	1,063	$	337,352
Investment management fees from investment management agreements	1,060		83,726		194,445		—		8,912		288,143
Investment operations fees	1,359		—		—		328,316		—		329,675
Investment processing fees - PaaS	137,737		—		—		—		—		137,737
Investment processing fees - SaaS	84,783		—		—		10,122		—		94,905
Professional services fees	11,535		—		—		4,674		—		16,209
Account fees and other	3,858		14,774		1,236		16,167		279		36,314
Total revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335
Primary Geographic Markets:
United States	$	220,254	$	299,218	$	185,202	$	335,776	$	10,254	$	1,050,704
United Kingdom	71,938		—		38,034		—		—		109,972
Canada	30,723		—		4,327		—		—		35,050
Ireland	12,824		—		7,321		24,039		—		44,184
Other	—		—		425		—		—		425
Total revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335

Investment management fees from pooled investment products - Revenues associated with clients' assets invested in Company-sponsored pooled investment products. Contractual fees are stated as a percentage of the market value of

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assets under management and collected on a monthly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment management fees from investment management agreements - Revenues based on assets of clients of the Institutional Investors segment primarily invested in Company-sponsored products. Each client is charged an investment management fee that is stated as a percentage of the market value of all assets under management. The client is billed directly on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Revenues associated with the separately managed account program offered through registered investment advisors located throughout the United States. The contractual fee is stated as a percentage of the market value of all assets invested in the separately managed account and collected on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment operations fees - Revenues earned from accounting and administrative services, distribution support services and regulatory and compliance services to investment management firms and family offices. The Company contracts directly with the investment management firm or family office. The contractual fees are stated as a percentage of net assets under administration and billed when asset valuations are finalized. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment processing fees - Platform as a Service - Revenues associated with clients that outsource their entire investment operation and back-office processing functions. Through the use of the Company's proprietary platforms, the Company assumes all back-office investment processing services including investment processing, custody and safekeeping of assets, income collections, securities settlement and other related trust activities. The contractual fee is based on either a monthly fee or a percentage of the value of assets processed on the Company's platforms each month as long as the fee is in excess of a monthly contractual minimum. The contractual fee may also include additional fees determined on a per-account or per-transaction basis. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment processing fees - Software as a Service - Revenues associated with clients that outsource investment processing technology software and computer processing by accessing our proprietary software and data center remotely but retain responsibility for all investment operations, client administration and other back-office trust operations. The contractual fee is based on a monthly fee plus additional fees determined on a per-account or per-transaction basis. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Professional services fees - Revenues associated with the business services migration for investment processing clients of the Private Banks segment and investment operations clients of the Investment Managers segment. In addition, Professional services include other services such as business transformation consulting. Typically, fees are stated as a contractual fixed fee. The client is billed directly and fees are collected according to the terms of the agreement.

Account fees and other - Revenues associated with custody account servicing, account terminations, reimbursements received for out-of-pocket expenses, and other fees for the provision of ancillary services.

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

(In thousands, except asset balances and per share data)

This discussion reviews and analyzes the consolidated financial condition, the consolidated results of operations and other key factors that may affect future performance. This discussion should be read in conjunction with the Consolidated Financial Statements, the Notes to the Consolidated Financial Statements and the Annual Report on Form 10-K for the year ended December 31, 2020.

Overview

Consolidated Summary

SEI is a leading global provider of technology-driven wealth and investment management solutions. We deliver comprehensive platforms, services and infrastructure—encompassing technology, operational, and investment management services—to help wealth managers, financial advisors, investment managers, family offices, institutional and private investors create and manage wealth. Investment processing fees are earned as either monthly fees for contracted services or as a percentage of the market value of our clients' assets processed on our platforms. Investment operations and investment management fees are earned as a percentage of assets under management, administration or advised assets (See Note 13 to the Consolidated Financial Statements for more information pertaining to our revenues). As of September 30, 2021, through our subsidiaries and partnerships in which we have a significant interest, we manage, advise or administer $1.3 trillion in hedge, private equity, mutual fund and pooled or separately managed assets, including $391.5 billion in assets under management and $866.3 billion in client assets under administration. Our affiliate, LSV Asset Management (LSV), manages $97.6 billion of assets which are included as assets under management.

Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2021 and 2020 were:

	Three Months Ended September 30,				Percent Change*	Nine Months Ended September 30,				Percent Change*
	2021		2020			2021		2020
Revenues	$	485,322	$	424,927	14%	$	1,416,659	$	1,240,335	14%
Expenses	344,197		313,590		10%	1,006,676		918,458		10%
Income from operations	141,125		111,337		27%	409,983		321,877		27%
Net (loss) gain from investments	(575)		776		NM	134		(1,310)		NM
Interest income, net of interest expense	791		856		(8)%	2,361		5,126		(54)%
Equity in earnings from unconsolidated affiliate	35,005		28,305		24%	103,420		86,488		20%
Income before income taxes	176,346		141,274		25%	515,898		412,181		25%
Income taxes	38,301		30,178		27%	114,605		90,777		26%
Net income	138,045		111,096		24%	401,293		321,404		25%
Diluted earnings per common share	$	0.97	$	0.75	29%	$	2.79	$	2.14	30%

* Variances noted "NM" indicate the percent change is not meaningful.

The following items had a significant impact on our financial results for the three and nine months ended September 30, 2021 and 2020:

•Revenue from Asset management, administration and distribution fees increased from higher average assets under administration from market appreciation and positive cash flows from new and existing clients. Average assets under administration increased $148.2 billion, or 21%, to $845.2 billion in the first nine months of 2021 as compared to $697.0 billion during the first nine months of 2020.

•Average assets under management, excluding LSV, increased $54.6 billion, or 23%, to $291.3 billion in the first nine months of 2021 as compared to $236.7 billion during the first nine months of 2020. The increase was primarily due to market appreciation from the recovery of the capital markets during the later half of 2020 and first half of 2021. Defined benefit plan client losses in the Institutional Investors segment partially offset the increase and negatively impacted our asset-based revenues.

•Information processing and software servicing fees in the Private Banks segment increased $23.8 million during the first nine months of 2021 due to higher asset balances processed on SWP.

•Earnings from LSV increased to $103.4 million in the first nine months of 2021 as compared to $86.5 million in the first nine months of 2020 due to higher assets under management from market appreciation and new clients. Negative cash flows from existing clients and client losses partially offset the increase in earnings from LSV.

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•Operating expenses increased primarily from direct costs related to increased revenues and higher personnel costs due to business growth and competitive labor markets.

•Stock-based compensation expense increased $10.7 million during the first nine months of 2021 due to equity awards in late 2020 and from a change in estimate of the timing of when stock-option vesting targets would be achieved.

•We capitalized $19.4 million in the first nine months of 2021 for the SEI Wealth Platform as compared to $17.2 million in the first nine months of 2020. Amortization expense related to SWP increased to $35.8 million during the first nine months of 2021 as compared to $32.6 million during the first nine months of 2020 due to additional enhancements placed in service.

•We continued the stock repurchase program during 2021 and purchased 5.2 million shares for $316.1 million in the nine month period.

Impact of COVID-19 and Other Events

The occurrence of unforeseen or catastrophic events, including the emergence of a pandemic or other widespread health emergency or concerns over the possibility of such an emergency, could create economic and financial disruptions, and could lead to operational difficulties that could impair our ability to manage our business. In December 2019, a novel strain of coronavirus (COVID-19) was identified in Wuhan, China. COVID-19 quickly spread globally, leading the World Health Organization to declare the COVID-19 virus outbreak a global pandemic in March 2020. Since that time, governmental authorities have implemented numerous and varying measures to stall the spread and ameliorate the impact of COVID-19, including travel bans and restrictions, quarantines, curfews, shelter in place and safer-at-home orders, business shutdowns and closures, and have also implemented multi-step policies with the goal of re-opening domestic and global markets. Certain jurisdictions have begun re-opening only to return to restrictions in the face of increases in new COVID-19 cases. Recent developments include the phased re-opening of domestic and global markets to varying degrees.

In March 2020, we executed upon our business resiliency and contingency plans. To date, our remote capabilities have proven to be effective during the disruption caused by the COVID-19 pandemic with almost the entire workforce working remotely, with only a very limited number of on-site activities in our operational offices continuing to be performed.

We continue to closely monitor the domestic and international landscape for changes in governmental measures both in the United States and in the locations where we rely on critical outsourced services. We continue to be in regular contact with regulators, clients and vendors to confirm the measures taken to continue operating during this crisis, taking into consideration the latest announcements from state and federal authorities. We are also in continuous communication with our workforce to provide for the health and welfare of our employees working remotely and have implemented a return plan that is available for review on our website for those employees working in our operational offices. We will monitor the ability of these individuals to work as safely as possible at our offices and make adjustments to the number of on-site personnel (either increases or decreases) accordingly. We expect that the individual circumstances of our employees regarding school, childcare, care-giving and underlying health concerns will significantly impact our ability to return staff to their primary office locations.

The majority of our revenues are based on the value of assets invested in investment products that we manage or administer which are affected by changes in the capital markets and the portfolio strategy of our clients or their customers. The strong recovery of the capital markets after the widespread economic shutdowns in response to the emergence of the pandemic has had a positive impact on our asset-based fees thereby increasing our base revenues. Any prolonged future downturns in general capital market conditions or long-term client portfolio strategies directing significant assets into lower margin products could have adverse effects on our revenues and earnings derived from assets under management and administration.

While we have developed and implemented and continue to develop and implement health and safety protocols, business continuity plans and crisis management protocols designed to mitigate the potentially negative impact of COVID-19 to our employees and our business, the extent of the impact of the pandemic on our business and financial results will continue to depend on numerous evolving factors that we are not able to accurately predict and which will vary by market, including the duration and scope of the pandemic, the effectiveness of vaccinations, the implications arising out of the emerging and potentially yet to be identified variants of COVID-19, global economic conditions during and after the pandemic, governmental actions that have been taken, or may be taken in the future, in response to the pandemic, the extent that critical public and private infrastructure functions upon which we rely are suspended and changes in investor and consumer behavior in response to the pandemic. The resulting market conditions may adversely affect our revenues and earnings derived from assets under management and administration.

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On May 17, 2020, M.J. Brunner (Brunner), one of our third-party developers/vendors that provides development services and application management for two of our client applications experienced a ransomware attack. We are aware that certain client data was illegally accessed and revealed by cybercriminal(s). The applications themselves were not compromised by this attack. The root cause of the attack was not predicated on vulnerability within SEI’s network, and neither SEI’s network nor operations were compromised, attacked or otherwise affected as part of this incident. While there were direct and indirect expenses associated with the incident in each fiscal quarter since the incident, and we expect there will continue to be costs associated with the incident going-forward, we do not expect these will be material. We note that several regulatory bodies who routinely review our operations, including the SEC and the United States Federal Financial Institutions Examination Council (FFIEC), have requested information with respect to, and are investigating the facts and circumstances surrounding, the ransomware attack on Brunner. We have produced information in connection with and continue to cooperate in the ongoing investigation being conducted by the SEC’s Division of Enforcement relating to this matter. Additionally, the SEC’s Division of Examinations concluded its examination of our regulated entities and found limited and discrete deficiencies in the execution of our third-party vendor management program as it pertained to Brunner. While we have identified no causal connection between the Examination findings and the Brunner ransomware attack, we take our clients’ security very seriously and have responded to the Staff’s Examination findings and are documenting further enhancements to our third-party vendor management program.

One SEISM Strategy

In 2020, we invested in our One SEI strategy. The One SEI strategy is a company-wide initiative to open business opportunities across the entire company by leveraging existing and new SEI platforms and making them accessible to all types of clients, adjacent markets and other non-SEI platforms. As we execute on our strategy, we have incurred significant costs during 2020 and throughout 2021 to integrate, modularize and leverage these technologies in our service offerings for the front, middle and back-office. The majority of these costs have been recognized in the Investments in New Businesses segment. To date, we have not capitalized any software development costs related to the One SEI strategy. We expect these investments will continue during the fourth quarter of 2021 and into 2022 as we continue to deliver on our One SEI strategy.

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Ending Asset Balances

(In millions)

	As of September 30,				Percent Change
	2021		2020
Private Banks:
Equity and fixed-income programs	$	25,618	$	23,499	9%
Collective trust fund programs	6		6		—%
Liquidity funds	3,988		3,718		7%
Total assets under management	$	29,612	$	27,223	9%
Client assets under administration	4,675		24,174		(81)%
Total assets	$	34,287	$	51,397	(33)%
Investment Advisors:
Equity and fixed-income programs	$	78,560	$	65,581	20%
Collective trust fund programs	—		3		(100)%
Liquidity funds	3,477		3,866		(10)%
Total Platform assets under management	$	82,037	$	69,450	18%
Platform-only assets (E)	13,728		10,506		31%
Total Platform assets (E)	$	95,765	$	79,956	20%
Institutional Investors:
Equity and fixed-income programs	$	89,441	$	83,846	7%
Collective trust fund programs	5		101		(95)%
Liquidity funds	2,599		2,096		24%
Total assets under management	$	92,045	$	86,043	7%
Client assets under advisement	4,698		3,618		30%
Total assets	$	96,743	$	89,661	8%
Investment Managers:
Collective trust fund programs	$	87,488	$	63,277	38%
Liquidity funds	568		389		46%
Total assets under management	$	88,056	$	63,666	38%
Client assets under administration (A)	861,605		730,369		18%
Total assets	$	949,661	$	794,035	20%
Investments in New Businesses:
Equity and fixed-income programs	$	1,964	$	1,572	25%
Liquidity funds	202		169		20%
Total assets under management	$	2,166	$	1,741	24%
Client assets under advisement	1,378		1,179		17%
Total assets	$	3,544	$	2,920	21%
LSV:
Equity and fixed-income programs (B)	$	97,604	$	82,051	19%

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Total:
Equity and fixed-income programs (C)	$	293,187	$	256,549	14%
Collective trust fund programs	87,499		63,387		38%
Liquidity funds	10,834		10,238		6%
Total assets under management	$	391,520	$	330,174	19%
Client assets under advisement	6,076		4,797		27%
Client assets under administration (D)	866,280		754,543		15%
Platform-only assets	13,728		10,506		31%
Total assets	$	1,277,604	$	1,100,020	16%

(A)Client assets under administration in the Investment Managers segment include $12.3 billion of assets that are at fee levels below our normal full service assets (as of September 30, 2021).

(B)    Equity and fixed-income programs include assets managed by LSV in which fees are based on performance only. The ending value of these assets as of September 30, 2021 was $2.3 billion.

(C)    Equity and fixed-income programs include $7.8 billion of assets invested in various asset allocation funds at September 30, 2021.

(D)    In addition to the numbers presented, SEI also administers an additional $13.7 billion in Funds of Funds assets (as of September 30, 2021) on which SEI does not earn an administration fee.

(E)    Platform assets under management and Platform-only assets combined are total Platform assets in the Investment Advisors segment.

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Average Asset Balances

(In millions)

	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2021		2020			2021		2020
Private Banks:
Equity and fixed-income programs	$	26,232	$	23,740	10%	$	25,809	$	23,542	10%
Collective trust fund programs	6		7		(14)%	6		5		20%
Liquidity funds	3,916		3,948		(1)%	3,875		3,965		(2)%
Total assets under management	$	30,154	$	27,695	9%	$	29,690	$	27,512	8%
Client assets under administration	4,476		25,295		(82)%	4,399		24,651		(82)%
Total assets	$	34,630	$	52,990	(35)%	$	34,089	$	52,163	(35)%
Investment Advisors:
Equity and fixed-income programs	$	79,602	$	64,479	23%	$	76,560	$	62,280	23%
Collective trust fund programs	—		3		(100)%	1		3		(67)%
Liquidity funds	3,403		4,569		(26)%	3,464		4,925		(30)%
Total Platform assets under management	$	83,005	$	69,051	20%	$	80,025	$	67,208	19%
Platform-only assets (E)	13,863		10,501		32%	13,120		9,481		38%
Total Platform assets (E)	$	96,868	$	79,552	22%	$	93,145	$	76,689	21%
Institutional Investors:
Equity and fixed-income programs	$	91,965	$	82,830	11%	$	92,257	$	79,931	15%
Collective trust fund programs	5		102		(95)%	56		96		(42)%
Liquidity funds	2,742		2,120		29%	2,681		2,313		16%
Total assets under management	$	94,712	$	85,052	11%	$	94,994	$	82,340	15%
Client assets under advisement	4,658		3,565		31%	4,440		3,562		25%
Total assets	$	99,370	$	88,617	12%	$	99,434	$	85,902	16%
Investment Managers:
Collective trust fund programs	$	89,441	$	62,028	44%	$	84,010	$	57,347	46%
Liquidity funds	532		565		(6)%	497		555		(10)%
Total assets under management	$	89,973	$	62,593	44%	$	84,507	$	57,902	46%
Client assets under administration (A)	851,183		713,528		19%	840,774		672,309		25%
Total assets	$	941,156	$	776,121	21%	$	925,281	$	730,211	27%
Investments in New Businesses:
Equity and fixed-income programs	$	1,958	$	1,560	26%	$	1,857	$	1,564	19%
Liquidity funds	205		180		14%	203		177		15%
Total assets under management	$	2,163	$	1,740	24%	$	2,060	$	1,741	18%
Client assets under advisement	1,423		1,206		18%	1,385		1,192		16%
Total assets	$	3,586	$	2,946	22%	$	3,445	$	2,933	17%
LSV:
Equity and fixed-income programs (B)	$	99,924	$	83,536	20%	$	100,328	$	83,997	19%

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Total:
Equity and fixed-income programs (C)	$	299,681	$	256,145	17%	$	296,811	$	251,314	18%
Collective trust fund programs	89,452		62,140		44%	84,073		57,451		46%
Liquidity funds	10,798		11,382		(5)%	10,720		11,935		(10)%
Total assets under management	$	399,931	$	329,667	21%	$	391,604	$	320,700	22%
Client assets under advisement	6,081		4,771		27%	5,825		4,754		23%
Client assets under administration (D)	855,659		738,823		16%	845,173		696,960		21%
Platform-only assets	13,863		10,501		32%	13,120		9,481		38%
Total assets	$	1,275,534	$	1,083,762	18%	$	1,255,722	$	1,031,895	22%

(A)    Average client assets under administration in the Investment Managers segment for the three months ended September 30, 2021 include $12.5 billion that are at fee levels below our normal full service assets.

(B)    Equity and fixed-income programs include assets managed by LSV in which fees are based on performance only. The average value of these assets for the three months ended September 30, 2021 was $2.4 billion.

(C)    Equity and fixed-income programs include $7.8 billion of average assets invested in various asset allocation funds for the three months ended September 30, 2021.

(D)    In addition to the numbers presented, SEI also administers an additional $13.6 billion of average assets in Funds of Funds assets for the three months ended September 30, 2021 on which SEI does not earn an administration fee.

(E)    Platform assets under management and Platform-only assets combined are total Platform assets in the Investment Advisors segment.

In the preceding tables, assets under management are total assets of our clients or their customers invested in equity and fixed-income investment programs, collective trust fund programs, and liquidity funds for which we provide asset management services through our subsidiaries and partnerships in which we have a significant interest. Assets under advisement include assets for which we provide advisory services through a subsidiary to the accounts but do not manage the underlying assets. Assets under administration include total assets of our clients or their customers for which we provide administrative services, including client fund balances for which we provide administration and/or distribution services through our subsidiaries and partnerships in which we have a significant interest. Platform-only assets include total assets of our clients or their customers which are not invested in any SEI-sponsored investment products. The assets presented in the preceding tables do not include assets processed on SWP and are not included in the accompanying Consolidated Balance Sheets because we do not own them.

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Business Segments

Revenues, Expenses and Operating Profit (Loss) for our business segments for the three and nine months ended September 30, 2021 compared to the three and nine months ended September 30, 2020 were as follows:

	Three Months Ended September 30,						Percent Change	Nine Months Ended September 30,						Percent Change
	2021			2020				2021			2020
Private Banks:
Revenues	$	123,018		$	114,792		7%	$	364,302		$	335,739		9%
Expenses	116,679			113,066			3%	345,057			331,442			4%
Operating Profit	$	6,339		$	1,726		NM	$	19,245		$	4,297		NM
Operating Margin	5		%	2		%		5		%	1		%
Investment Advisors:
Revenues	$	124,768		$	103,189		21%	$	357,458		$	299,218		19%
Expenses	62,107			51,519			21%	176,267			154,100			14%
Operating Profit	$	62,661		$	51,670		21%	$	181,191		$	145,118		25%
Operating Margin	50		%	50		%		51		%	48		%
Institutional Investors:
Revenues	$	85,759		$	79,583		8%	$	255,957		$	235,309		9%
Expenses	41,643			37,812			10%	122,696			113,016			9%
Operating Profit	$	44,116		$	41,771		6%	$	133,261		$	122,293		9%
Operating Margin	51		%	52		%		52		%	52		%
Investment Managers:
Revenues	$	147,412		$	123,846		19%	$	426,639		$	359,815		19%
Expenses	89,594			79,838			12%	257,609			228,795			13%
Operating Profit	$	57,818		$	44,008		31%	$	169,030		$	131,020		29%
Operating Margin	39		%	36		%		40		%	36		%
Investments in New Businesses:
Revenues	$	4,365		$	3,517		24%	$	12,303		$	10,254		20%
Expenses	12,820			13,315			(4)%	39,855			37,691			6%
Operating Loss	$	(8,455)		$	(9,798)		NM	$	(27,552)		$	(27,437)		NM

For additional information pertaining to our business segments, see Note 9 to the Consolidated Financial Statements.

Private Banks

	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2021		2020			2021		2020
Revenues:
Information processing and software servicing fees	$	88,340	$	81,811	8%	$	261,907	$	238,099	10%
Asset management, administration & distribution fees	34,678		32,981		5%	102,395		97,640		5%
Total revenues	$	123,018	$	114,792	7%	$	364,302	$	335,739	9%

Revenues increased $8.2 million, or 7%, in the three month period and increased $28.6 million, or 9%, in the nine month period ended September 30, 2021 and were primarily affected by:

•Increased investment processing fees from new SWP client conversions and growth from existing SWP clients, partially due to market appreciation;

•Increased investment management fees from existing international clients due to market appreciation;

•Increased non-recurring professional service fees from existing clients and one-time early termination fees from an existing TRUST 3000® client; and

•The positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British

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pound on our foreign operations; partially offset by

•Decreased investment processing fees from the loss of clients; and

•Decreased investment management fees from liquidity products.

Operating margins increased to 5% in the three and nine month periods. Operating margins in the prior year comparable periods were essentially flat. Operating income increased by $4.6 million in the three month period and increased by $14.9 million in the nine month period and was primarily affected by:

•An increase in revenues;

•Decreased non-capitalized costs, mainly personnel and consulting costs, related to maintenance, support and client migrations to SWP; and

•The net positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British pound on our foreign operations; partially offset by

•Increased direct expenses associated with increased investment management fees from existing international clients;

•Increased amortization expense related to SWP; and

•Increased personnel and stock-based compensation costs.

Investment Advisors

	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2021		2020			2021		2020
Revenues:
Investment management fees-SEI fund programs	$	77,123	$	68,287	13%	$	224,816	$	200,718	12%
Separately managed account fees	41,688		29,761		40%	114,747		83,726		37%
Other fees	5,957		5,141		16%	17,895		14,774		21%
Total revenues	$	124,768	$	103,189	21%	$	357,458	$	299,218	19%

Revenues increased $21.6 million, or 21%, in the three month period and increased $58.2 million, or 19%, in the nine month period ended September 30, 2021 and were primarily affected by:

•Increased separately managed account program fees from positive cash flows into new and existing SEI-sponsored programs; and

•The positive impact to investment management fees from market appreciation; partially offset by

•Negative cash flows from SEI-sponsored mutual funds.

Operating margin remained at 50% in the three month period and increased to 51% compared to 48% in the nine month period. Operating income increased $11.0 million, or 21%, in the three month period and increased $36.1 million, or 25%, in the nine month period and was primarily affected by:

•An increase in revenues; partially offset by

•Increased direct expenses associated with increased assets into our separately managed account program; and

•Increased promotion costs as well as increased personnel and stock-based compensation costs.

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Institutional Investors

Revenues increased $6.2 million, or 8%, in the three month period and increased $20.6 million, or 9%, in the nine month period ended September 30, 2021 and were primarily affected by:

•Increased investment management fees from market appreciation;

•Asset funding from new sales of our OCIO platform;

•Performance fees associated with an SEI-sponsored investment product during the third-quarter 2021; and

•The positive impact from foreign currency exchange rate fluctuations between the U.S. dollar and the British pound on our foreign operations; partially offset by

•Defined benefit client losses.

Operating margin decreased to 51% compared to 52% in the three month period and remained at 52% in the nine month period. Operating income increased $2.3 million, or 6%, in the three month period and increased $11.0 million, or 9%, in the nine month period and was primarily affected by:

•An increase in revenues; partially offset by

•Increased direct expenses associated with investment management fees; and

•Increased personnel and stock-based compensation costs.

Investment Managers

Revenues increased $23.6 million, or 19%, in the three month period and increased $66.8 million, or 19%, in the nine month period ended September 30, 2021 and were primarily affected by:

•Higher valuations of existing client assets from market appreciation; and

•Positive cash flows into alternative, traditional and separately managed account offerings from new and existing clients; partially offset by

•Client losses and fund closures.

Operating margin increased to 39% compared to 36% in the three month period and increased to 40% compared to 36% in the nine month period. Operating income increased $13.8 million, or 31%, in the three month period and increased $38.0 million, or 29%, in the nine month period and was primarily affected by:

•An increase in revenues; partially offset by

•Increased costs associated with new business, primarily personnel expenses and third-party vendor costs;

•Increased non-capitalized investment spending, mainly consulting costs; and

•Increased stock-based compensation costs

Other

Corporate overhead expenses

Corporate overhead expenses primarily consist of general and administrative expenses and other costs not directly attributable to a reportable business segment. Corporate overhead expenses were $21.4 million and $18.0 million in the three months ended September 30, 2021 and 2020, respectively, and $65.2 million and $53.4 million in the nine months ended September 30, 2021 and 2020, respectively. The increase in corporate overhead expenses is primarily due to an increase in personnel costs, stock-based compensation, consulting and professional fees.

Other income and expense

Other income and expense items on the accompanying Consolidated Statements of Operations consists of: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net (loss) gain from investments	$	(575)	$	776	$	134	$	(1,310)
Interest and dividend income	892		1,009		2,715		5,582
Interest expense	(101)		(153)		(354)		(456)
Equity in earnings of unconsolidated affiliate	35,005		28,305		103,420		86,488
Total other income and expense items, net	$	35,221	$	29,937	$	105,915	$	90,304

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Interest and dividend income

Interest and dividend income is earned based upon the amount of cash that is invested daily. The decrease in interest and dividend income in the three and nine months ended September 30, 2021 was due to an overall decline in interest rates.

Equity in earnings of unconsolidated affiliate

Equity in earnings of unconsolidated affiliate reflects our ownership interest in LSV. As of September 30, 2021, our total partnership interest in LSV was 38.7%. The table below presents the revenues and net income of LSV and the proportionate share in LSV's earnings.

	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2021		2020			2021		2020
Revenues of LSV	$	115,728	$	94,902	22%	$	342,957	$	289,546	18%
Net income of LSV	90,365		70,440		28%	266,805		220,184		21%
SEI's proportionate share in earnings of LSV	$	35,005	$	28,305	24%	$	103,420	$	86,488	20%

The increase in earnings from LSV in the three and nine months ended September 30, 2021 was primarily due to higher assets under management from market appreciation. Negative cash flows from existing clients and client losses partially offset the increase in earnings from LSV. Average assets under management by LSV increased $16.3 billion to $100.3 billion during the nine months ended September 30, 2021 as compared to $84.0 billion during the nine months ended September 30, 2020, an increase of 19%.

Income Taxes

The effective income tax rates for the three and nine months ended September 30, 2021 and 2020 differ from the federal income tax statutory rate due to the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Statutory rate	21.0	%	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.5		3.3		3.0		3.2
Foreign tax expense and tax rate differential	(0.1)		(0.2)		(0.1)		(0.1)
Tax benefit from stock option exercises	(0.6)		(0.4)		(1.0)		(1.0)
Expiration of the statute of limitations	—		(1.3)		—		(0.5)
Provision-to-return adjustment	(0.5)		(0.4)		(0.2)		(0.1)
Other, net	(0.3)		(0.6)		(0.3)		(0.5)
	21.7	%	21.4	%	22.2	%	22.0	%

Stock-Based Compensation

We recognized $31.2 million and $20.5 million in stock-based compensation expense during the nine months ended September 30, 2021 and 2020, respectively. The amount of stock-based compensation expense we recognize is based upon management's estimate of when financial vesting targets may be achieved. Any change in the estimate could result in the amount of stock-based compensation expense to be accelerated, spread out over a longer period, or reversed. This may cause volatility in the recognition of stock-based compensation expense in future periods and could materially affect earnings.

We revised our estimate of when some vesting targets are expected to be achieved. This change in estimate resulted in an increase of $3.2 million in stock-based compensation expense during the nine months ended September 30, 2021. We expect to recognize $13.1 million in stock-based compensation expense during the remainder of 2021.

Fair Value Measurements

The fair value of financial assets and liabilities, except for the investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The fair value of all other financial assets are determined using Level 1 or Level 2 inputs and consist mainly of investments in equity or fixed-income mutual funds that are quoted daily and Government National Mortgage Association (GNMA) and other U.S. government agency securities that are single

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issuer pools that are valued based on current market data of similar assets. Level 3 financial liabilities at September 30, 2021 and December 31, 2020 consist entirely of the estimated contingent consideration resulting from an acquisition (See Note 12 to the Consolidated Financial Statements).

Regulatory Matters

Like many firms operating within the financial services industry, we are experiencing a complex and changing regulatory environment across our markets. Our current scale and reach as a provider to the financial services industry, the introduction and implementation of new solutions for our financial services industry clients, the increased regulatory oversight of the financial services industry generally, new laws and regulations affecting the financial services industry and ever-changing regulatory interpretations of existing laws and regulations, and a greater propensity of regulators to pursue enforcement actions and other sanctions against regulated entities, have made this an increasingly challenging and costly regulatory environment in which to operate.

SEI and some of our regulated subsidiaries have undergone or been scheduled to undergo a range of periodic or thematic reviews, examinations or investigations by numerous regulatory authorities around the world, including the Office of the Comptroller of the Currency, the Securities and Exchange Commission, the Financial Industry Regulatory Authority, the Financial Conduct Authority of the United Kingdom (FCA), the Central Bank of Ireland and others. These regulatory activities typically result in the identification of matters or practices to be addressed by us or our subsidiaries and, in certain circumstances, the regulatory authorities require remediation activities or pursue enforcement proceedings against us or our subsidiaries. From time to time, the regulators in different jurisdictions will elevate their level of scrutiny of our operations as our business expands or is deemed critical to the operations of the relevant financial markets. As described under the caption “Regulatory Considerations” in our Annual Report on Form 10-K, the range of possible sanctions that are available to regulatory authorities include limitations on our ability to engage in business for specified periods of time, the revocation of registration, censures and fines. The direct and indirect costs of responding to these regulatory activities and of complying with new or modified regulations, as well as the potential financial costs and potential reputational impact against us of any enforcement proceedings that might result, is uncertain but could have a material adverse impact on our operating results or financial position.

Liquidity and Capital Resources 

	Nine Months Ended September 30,
	2021		2020
Net cash provided by operating activities	$	483,881	$	396,524
Net cash used in investing activities	(87,542)		(64,243)
Net cash used in financing activities	(387,390)		(401,833)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(2,442)		(4,196)
Net increase (decrease) in cash, cash equivalents and restricted cash	6,507		(73,748)
Cash, cash equivalents and restricted cash, beginning of period	787,727		844,547
Cash, cash equivalents and restricted cash, end of period	$	794,234	$	770,799

Cash requirements and liquidity needs are primarily funded through our cash flow from operations and our capacity for additional borrowing. At September 30, 2021, our unused sources of liquidity consisted of cash and cash equivalents and the amount available under our credit facility.

On April 23, 2021, we replaced our credit facility with a new five-year credit facility agreement which provides for borrowings up to $325.0 million (See Note 6 to the Consolidated Financial Statements). The new credit facility is a revolving line of credit with Wells Fargo Bank, N.A., and a syndicate of other lenders and is scheduled to expire in April 2026. The availability of the credit facility is subject to compliance with certain covenants set forth in the agreement. The credit facility contains covenants which restrict our ability to engage in transactions with affiliates other than wholly-owned subsidiaries or to incur liens or certain types of indebtedness as defined in the agreement. In the event of a default under the credit facility, we would also be restricted from paying dividends on, or repurchasing, our common stock. Currently, our ability to borrow from the credit facility is not limited by any covenant of the agreement (See Note 6 to the Consolidated Financial Statements).

The credit facility contains terms that utilize the London InterBank Offered Rate (LIBOR) as a potential component of the interest rate to be applied to any borrowings; however, an alternative reference rate is included under the agreement which provides for a specified replacement rate upon a LIBOR cessation event. At the time of a LIBOR cessation event,

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the replacement rate, the Secured Overnight Financing Rate (SOFR), self-executes without the need for negotiations or a formal amendment process.

We had outstanding letters of credit of $5.8 million as of October 21, 2021 which reduced our amount available under the credit facility to $319.2 million. These letters of credit were primarily issued for the expansion of our corporate headquarters completed in 2020 and are due to expire in late 2021.

The majority of excess cash reserves are primarily placed in accounts located in the United States that invest entirely in SEI-sponsored money market mutual funds denominated in the U.S. dollar. We also utilize demand deposit accounts or money market accounts at several well-established financial institutions located in the United States. Accounts used to manage these excess cash reserves do not impose any restrictions or limitations that would prevent us from being able to access such cash amounts immediately. As of October 21, 2021, the amount of cash and cash equivalents considered free and immediately accessible for other general corporate purposes was $376.1 million.

Cash and cash equivalents include accounts managed by subsidiaries that are used in their operations or to cover specific business and regulatory requirements. The availability of this cash for other purposes beyond the operations of these subsidiaries may be limited. We therefore do not include accounts of foreign subsidiaries in the calculation of free and immediately accessible cash for other general corporate purposes. A portion of the undistributed earnings of foreign subsidiaries are deemed repatriated. Any subsequent transfer of available cash related to the repatriated earnings of foreign subsidiaries could significantly increase free and immediately accessible cash.

Cash flows from operations increased $87.4 million in the first nine months of 2021 compared to the first nine months of 2020 primarily from the increase in net income and increased repayments from LSV related to their working capital accounts. The negative impact from the change in the Company's working capital accounts and lower distribution payments received from LSV partially offset the increase.

Net cash used in investing activities includes:

•Purchases, sales and maturities of marketable securities. Purchases, sales and maturities of marketable securities in the first nine months of 2021 and 2020 were as follows:

	Nine Months Ended September 30,
	2021		2020
Purchases	$	(168,333)	$	(114,407)
Sales and maturities	134,222		113,417
Net investing activities from marketable securities	$	(34,111)	$	(990)

See Note 5 to the Consolidated Financial Statements for more information related to marketable securities.

•The capitalization of costs incurred in developing computer software. We capitalized $19.5 million of software development costs in the first nine months of 2021 as compared to $18.6 million in the first nine months of 2020. The majority of our software development costs are related to significant enhancements for the expanded functionality of the SEI Wealth Platform.

•Capital expenditures. Capital expenditures in the first nine months of 2021 were $22.5 million as compared to $43.1 million in the first nine months of 2020. Expenditures in 2021 include capital outlays for purchased software and equipment for data center operations. Expenditures in 2020 include the expansion of our corporate headquarters completed in the fourth quarter 2020 as well as purchased software and equipment. We continue to evaluate improvements to our information technology infrastructure which, if implemented, will result in additional expenditures for purchased software and equipment for data center operations.

•Other investing activities. We made a payment of $11.0 million in the first nine months of 2021 to purchase a technology platform providing digital collaboration tools for financial advisors. In October 2021, we made a payment related to the acquisition of an investor lifecycle management fintech firm. The cash payment associated with this acquisition was not material. In November 2021, pending regulatory approval, we expect to make a payment for the acquisition of a defined contribution master trust in the United Kingdom. The cash payment related to this acquisition is not expected to be material.

Net cash used in financing activities includes:

•The repurchase of common stock. Our Board of Directors has authorized the repurchase of common stock through multiple authorizations. Currently, there is no expiration date for the common stock repurchase program. We had total capital outlays of $315.8 million during the first nine months of 2021 and $327.1 million during the first nine months of 2020 for the repurchase of common stock.

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•Proceeds from the issuance of common stock. We received $37.9 million in proceeds from the issuance of common stock during the first nine months of 2021 as compared to $29.8 million during the first nine months of 2020. The increase in proceeds is primarily attributable to a higher level of stock option exercise activity.

•Dividend payments. Cash dividends paid were $105.5 million in the first nine months of 2021 as compared to $103.9 million in the first nine months of 2020.

We believe our operating cash flow, available borrowing capacity, and existing cash and cash equivalents should provide adequate funds for ongoing operations; continued investment in new products and equipment; the common stock repurchase program and future dividend payments.

Forward-Looking Information and Risk Factors

The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Certain information contained in this discussion is or may be considered forward-looking. Forward-looking statements relate to future operations, strategies, financial results or other developments. Forward-looking statements are based upon estimates and assumptions that involve certain risks and uncertainties, many of which are beyond our control or are subject to change. Although we believe our assumptions are reasonable, they could be inaccurate. Our actual future revenues and income could differ materially from our expected results. We have no obligation to publicly update or revise any forward-looking statements.

Among the risks and uncertainties which may affect our future operations, strategies, financial results or other developments are those risks described in our latest Annual Report on Form 10-K in Part I, Item 1A. These risks include the following:

•changes in capital markets that may affect our revenues and earnings;

•product development risk;

•risk of failure by a third-party service provider;

•data and cyber security risks;

•operational risks associated with the processing of investment transactions;

•systems and technology risks;

•intellectual property risks;

•pricing pressure from increased competition, disruptive technology and poor investment performance;

•the affect on our earnings and cashflows from the performance of LSV Asset Management;

•third-party pricing services for the valuation of securities invested in our investment products;

•external factors affecting the fiduciary management market;

•the affect of extensive governmental regulation;

•litigation and regulatory examinations and investigations;

•our ability to capture the expected value from acquisitions, divestitures, joint ventures, minority stakes or strategic alliances;

•increased costs and regulatory risks from the growth of our business;

•fiduciary or other legal liability for client losses from our investment management operations;

•consolidation within our target markets;

•our ability to receive dividends or other payments in needed amounts from our subsidiaries;

•the exit by the United Kingdom from the European Union;

•third-party approval of our investment products with advisors affiliated with independent broker-dealers or other networks;

•the effectiveness of our business, risk management and business continuity strategies, models and processes;

•financial and non-financial covenants which may restrict our ability to manage liquidity needs;

•changes in, or interpretation of, accounting principles or tax rules and regulations;

•fluctuations in foreign currency exchange rates;

•fluctuations in interest rates affecting the value of our fixed-income investment securities;

•our ability to hire and retain qualified employees;

•the competence and integrity of our employees and third-parties;

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•stockholder activism efforts;

•retention of executive officers and senior management personnel; and

•unforeseen or catastrophic events, including the emergence of pandemic, terrorist attacks, extreme weather events or other natural disasters.

We conduct operations through many regulated wholly-owned subsidiaries. These subsidiaries include:

•SEI Investments Distribution Co., or SIDCO, a broker-dealer registered with the SEC under the Securities Exchange Act of 1934 and a member of the Financial Industry Regulatory Authority, Inc., or FINRA;

•SEI Investments Management Corporation, or SIMC, an investment advisor registered with the SEC under the Investment Advisers Act of 1940 and with the Commodity Futures Trading Commission, or CFTC, under the Commodity Exchange Act;

•SEI Private Trust Company, or SPTC, a limited purpose federal thrift chartered and regulated by the Office of the Comptroller of the Currency;

•SEI Trust Company, or STC, a Pennsylvania trust company, regulated by the Pennsylvania Department of Banking and Securities;

•SEI Investments (Europe) Limited, or SIEL, an investment manager and financial institution subject to regulation by the Financial Conduct Authority of the United Kingdom;

•SEI Investments Canada Company, or SEI Canada, an investment fund manager that has various other capacities that is regulated by the Ontario Securities Commission and various provincial authorities;

•SEI Investments Global, Limited, or SIGL, a management company for Undertakings for Collective Investment in Transferable Securities, or UCITS, and for Alternative Investment Funds, or AIFs, that is regulated primarily by the Central Bank of Ireland, or CBI;

•SEI Investments - Global Fund Services, Ltd., or GFSL, an authorized provider of administration services for Irish and non-Irish collective investment schemes that is regulated by the CBI; and

•SEI Investments - Depositary and Custodial Services (Ireland) Limited, or D&C, an authorized provider of depositary and custodial services that is regulated by the CBI.

In addition to the regulatory authorities listed above, our subsidiaries are subject to the jurisdiction of regulatory authorities in other foreign countries. In addition to our wholly-owned subsidiaries, we also own a minority interest of approximately 38.7 percent in LSV, which is also an investment advisor registered with the SEC.

The Company, its regulated subsidiaries, their regulated services and solutions and their customers are all subject to extensive legislation, regulation and supervision that recently has been subject to, and continues to experience, significant change and increased regulatory activity. These changes and regulatory activities could have a material adverse effect on us and our clients.

The various governmental agencies and self-regulatory authorities that regulate or supervise the Company and its subsidiaries have broad administrative powers. In the event of a failure to comply with laws, regulations and requirements of these agencies and authorities, the possible business process changes required or sanctions that may be imposed include the suspension of individual employees, limitations on our ability to engage in business for specified periods of time, the revocation of applicable registration as a broker-dealer, investment advisor or other regulated entity, and, as the case may be, censures and fines. Additionally, certain securities and banking laws applicable to us and our subsidiaries provide for certain private rights of action that could give rise to civil litigation. Any litigation could have significant financial and non-financial consequences including monetary judgments and the requirement to take action or limit activities that could ultimately affect our business.

Governmental scrutiny from regulators, legislative bodies and law enforcement agencies with respect to matters relating to our regulated subsidiaries and their activities, services and solutions, our business practices, our past actions and other matters has increased dramatically in the past several years. Responding to these examinations, investigations, actions and lawsuits, regardless of the ultimate outcome of the proceeding, is time consuming and expensive and can divert the time and effort of our senior management from our business. Penalties, fines and changes to business processes sought by regulatory authorities have increased substantially over the last several years, and certain regulators have been more likely in recent years to commence enforcement actions or to advance or support legislation targeted at the financial services industry. We continue to be subject to inquiries from examinations and investigations by supervisory and enforcement divisions of regulatory authorities and expect this to continue in the future. We believe this is also the case with many of our regulated clients. Governmental scrutiny and legal and enforcement proceedings can also have a

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negative impact on our reputation, our relationship with clients and prospective clients, and on the morale and performance of our employees, which could adversely affect our businesses and results of operations.

We are subject to the USA PATRIOT Act of 2001, which contains anti-money laundering and financial transparency laws and requires implementation of regulations applicable to financial services companies, including standards for verifying client identification and monitoring client transactions and detecting and reporting suspicious activities. Anti-money laundering laws outside the United States contain similar requirements. We offer investment and banking solutions that also are subject to regulation by the federal and state securities and banking authorities, as well as foreign regulatory authorities, where applicable. Existing or future regulations that affect these solutions could lead to a reduction in sales of these solutions or require modifications of these solutions.

Compliance with existing and future regulations and responding to and complying with recent increased regulatory activity affecting broker-dealers, investment advisors, investment companies, financial institutions and their service providers could have a significant impact on us. We periodically undergo regulatory examinations and respond to regulatory inquiries and document requests. In addition, recent and continuing legislative activity in the United States and in other jurisdictions (including the European Union and the United Kingdom) have made and continue to make extensive changes to the laws regulating financial services firms. As a result of these examinations, inquiries and requests, as a result of increased civil litigation activity, and as a result of these new laws and regulations, we engage legal counsel and other subject matter experts, review our compliance procedures, solution and service offerings, and business operations, and make changes as we deem necessary or as may be required by the applicable authority. These additional activities and required changes may result in increased expense or may reduce revenues.

Our bank clients are subject to supervision by federal, state and foreign banking and financial services authorities concerning the manner in which such clients purchase and receive our products and services. Our plan sponsor clients and our subsidiaries providing services to those clients are subject to supervision by the Department of Labor and compliance with employee benefit regulations. Investment advisor and broker-dealer clients are regulated by the SEC, state securities authorities, or FINRA. Existing or future regulations applicable to our clients may affect our clients’ purchase of our products and services.

In addition, see the discussion of governmental regulations in Item 1A “Risk Factors” in our latest Annual Report on Form 10-K for a description of the risks that proposed regulatory changes may present for our business.

Item 3.    Quantitative and Qualitative Disclosures About Market Risk.

Information required by this item is set forth under the captions "Our revenues and earnings are affected by changes in capital markets and significant changes in the value of financial instruments" and "Changes in interest rates may affect the value of our fixed-income investment securities" in Item 1A "Risk Factors" and under the caption "Impact of COVID-19 and Other Events" in Item 7 "Management's Discussion and Analysis of Financial Condition and Results of Operations" of our Annual Report on Form 10-K for the year ended December 31, 2020. There have been no material changes to this information as it is disclosed in our Annual Report on Form 10-K for 2020.

Item 4.    Controls and Procedures.

(a) Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report. Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures as of the end of the period covered by this report are effective in ensuring that information required to be disclosed by us in reports filed under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Act is accumulated and communicated to the issuer’s management including its principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure. A controls system, no matter how well designed and operated, cannot provide absolute assurance that the objectives of the controls systems are met, and no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within a company have been detected.

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(b) Change in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the quarter ended September 30, 2021 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II.    OTHER INFORMATION

Item 1.    Legal Proceedings.

We and certain of our subsidiaries are a party to or have property subject to litigation and other proceedings, examinations and investigations that arise in the ordinary course of our business that we do not believe are material. These types of matters could result in fines, penalties, cost reimbursements or contributions, compensatory or treble damages or non-monetary sanctions or relief. We believe the probability is remote that the outcome of any of these matters will have a material adverse effect on SEI as a whole, notwithstanding that the unfavorable resolution of any matter may have a material effect on our net earnings in any particular interim reporting period. We cannot predict the outcome of legal or other proceedings with certainty. These matters include the proceedings summarized in “Note 11. Commitments and Contingencies” included in our Notes to Consolidated Financial Statements.

Item 1A.     Risk Factors.

Information regarding risk factors appears in Part I – Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. There have been no material changes in the risk factors from those disclosed in the Annual Report on Form 10-K for 2020.

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

(e)    Our Board of Directors has authorized the repurchase of up to $4.682 billion worth of our common stock through multiple authorizations. Currently, there is no expiration date for the common stock repurchase program.

Information regarding the repurchase of common stock during the three months ended September 30, 2021 is as follows:

Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program
July 2021	200,000	$	60.87	200,000	$	234,495,000
August 2021	619,000	61.77		619,000	196,241,000
September 2021	1,160,000	59.89		1,160,000	126,775,000
Total	1,979,000	$	60.57	1,979,000

Item 6.    Exhibits.

The following is a list of exhibits filed as part of the Form 10-Q.

31.1	Rule 13a-15(e)/15d-15(e) Certification of Chief Executive Officer.
31.2	Rule 13a-15(e)/15d-15(e) Certification of Chief Financial Officer.
32	Section 1350 Certifications.
101.INS	XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

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SIGNATURES

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

		SEI INVESTMENTS COMPANY
Date:	October 25, 2021	By:	/s/ Dennis J. McGonigle
			Dennis J. McGonigle
			Chief Financial Officer

46

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Alfred P. West, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of SEI Investments Company;

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 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 registrant’s board of directors (or persons performing the equivalent function):

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

Date: October 25, 2021

/s/ Alfred P. West, Jr.

Alfred P. West, Jr.

Chairman and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, Dennis J. McGonigle, certify that:

1. I have reviewed this quarterly report on Form 10-Q of SEI Investments Company;

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 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 registrant’s board of directors (or persons performing the equivalent function):

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

Date: October 25, 2021

/s/ Dennis J. McGonigle

Dennis J. McGonigle

Chief Financial Officer

EX-32

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

I, Alfred P. West, Jr., Chairman and Chief Executive Officer, and I, Dennis J. McGonigle, Chief Financial Officer, of SEI Investments Company, a Pennsylvania corporation (the “Company”), hereby certify that, to my knowledge:

(1) The Company’s Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2021 (the “Form 10-Q”) fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

(2) The information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date:	October 25, 2021	Date:	October 25, 2021
/s/ Alfred P. West, Jr.		/s/ Dennis J. McGonigle
Alfred P. West, Jr.		Dennis J. McGonigle
Chairman and Chief Executive Officer		Chief Financial Officer

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

XML

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Oct. 21, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	0-10200
Entity Registrant Name	SEI INVESTMENTS COMPANY
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-1707341
Entity Address, Address Line One	1 Freedom Valley Drive
Entity Address, City or Town	Oaks
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19456
City Area Code	610
Local Phone Number	676-1000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SEIC
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		139,452,507
Entity Central Index Key	0000350894
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Current Fiscal Year End Date	--12-31

XML

Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 793,883	$ 784,626
Restricted cash	351	3,101
Receivables from investment products	59,808	55,271
Receivables, net of allowance for doubtful accounts of $2,669 and $1,100	442,187	385,219
Securities owned	31,770	34,064
Other current assets	42,615	38,696
Total Current Assets	1,370,614	1,300,977
Property and Equipment, net of accumulated depreciation of $400,679 and $378,639	183,802	189,052
Operating Lease Right-of-Use Assets	35,145	38,397
Capitalized Software, net of accumulated amortization of $531,923 and $491,739	250,280	270,977
Available for Sale and Equity Securities	140,079	105,419
Investments in Affiliated Funds, at fair value	6,893	6,166
Investment in Unconsolidated Affiliate	39,872	98,433
Goodwill	64,489	64,489
Intangible Assets, net of accumulated amortization of $15,768 and $12,456	31,992	24,304
Deferred Contract Costs	34,263	33,781
Deferred Income Taxes	2,148	2,972
Other Assets, net	32,224	32,289
Total Assets	2,191,801	2,167,256
Current Liabilities:
Accounts payable	10,772	7,766
Accrued liabilities	231,043	299,845
Current portion of long-term operating lease liabilities	10,412	8,579
Deferred revenue	1,235	1,085
Total Current Liabilities	253,462	317,275
Long-term Income Taxes Payable	803	803
Deferred Income Taxes	47,434	55,159
Long-term Operating Lease Liabilities	29,857	34,058
Other Long-term Liabilities	22,157	20,054
Total Liabilities	353,713	427,349
Commitments and Contingencies
Shareholders' Equity:
Common stock, $0.01 par value, 750,000 shares authorized; 139,305 and 143,396 shares issued and outstanding	1,393	1,434
Capital in excess of par value	1,228,085	1,190,001
Retained earnings	629,153	565,270
Accumulated other comprehensive loss, net	(20,543)	(16,798)
Total Shareholders' Equity	1,838,088	1,739,907
Total Liabilities and Shareholders' Equity	$ 2,191,801	$ 2,167,256

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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 2,669	$ 1,100
Property and equipment, accumulated depreciation	400,679	378,639
Capitalized Software, accumulated amortization	531,923	491,739
Intangible Assets, accumulated amortization	$ 15,768	$ 12,456
Shareholders' Equity:
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	139,305,000	143,396,000
Common stock, shares outstanding	139,305,000	143,396,000

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Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues:
Revenues	$ 485,322	$ 424,927	$ 1,416,659	$ 1,240,335
Expenses:
Subadvisory, distribution and other asset management costs	55,619	45,126	161,610	134,645
Software royalties and other information processing costs	7,348	6,992	20,561	21,828
Compensation, benefits and other personnel	150,188	134,795	429,188	391,607
Stock-based compensation	11,318	6,467	31,173	20,458
Consulting, outsourcing and professional fees	55,868	57,949	165,657	168,350
Data processing and computer related	26,650	24,437	79,746	71,647
Facilities, supplies and other costs	14,124	16,679	49,851	47,448
Amortization	14,674	13,200	43,749	39,417
Depreciation	8,408	7,945	25,141	23,058
Total expenses	344,197	313,590	1,006,676	918,458
Income from operations	141,125	111,337	409,983	321,877
Net (loss) gain from investments	(575)	776	134	(1,310)
Interest and dividend income	892	1,009	2,715	5,582
Interest expense	(101)	(153)	(354)	(456)
Equity in earnings of unconsolidated affiliate	35,005	28,305	103,420	86,488
Income before income taxes	176,346	141,274	515,898	412,181
Income taxes	38,301	30,178	114,605	90,777
Net income	$ 138,045	$ 111,096	$ 401,293	$ 321,404
Basic earnings per common share (in USD per share)	$ 0.98	$ 0.76	$ 2.83	$ 2.18
Shares used to compute basic earnings per share (in shares)	140,507	145,812	141,928	147,586
Diluted earnings per common share (in USD per share)	$ 0.97	$ 0.75	$ 2.79	$ 2.14
Shares used to compute diluted earnings per share (in shares)	142,426	147,907	143,981	149,958
Dividends declared per common share (in USD per share)	$ 0	$ 0	$ 0.37	$ 0.35
Asset management, administration and distribution fees
Revenues:
Revenues	$ 393,296	$ 339,609	$ 1,143,451	$ 992,039
Information processing and software servicing fees
Revenues:
Revenues	$ 92,026	$ 85,318	$ 273,208	$ 248,296

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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 138,045	$ 111,096	$ 401,293	$ 321,404
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(5,546)	7,085	(2,867)	(5,051)
Unrealized (loss) gain on investments:
Unrealized (losses) gains during the period, net of income taxes of $208, $154, $453 and $(218)	(713)	(542)	(1,548)	702
Reclassification adjustment for losses realized in net income, net of income taxes of $(67), $(63), $(190) and $(126)	238	238	670	455
Total other comprehensive (loss) income, net of tax	(6,021)	6,781	(3,745)	(3,894)
Comprehensive income	$ 132,024	$ 117,877	$ 397,548	$ 317,510

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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Unrealized gains during the period, taxes	$ 208	$ 154	$ 453	$ (218)
Reclassification adjustment for losses realized in net income, taxes	$ (67)	$ (63)	$ (190)	$ (126)

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Consolidated Statements of Changes in Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital In Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance, shares at Dec. 31, 2019		149,745
Beginning balance at Dec. 31, 2019	$ 1,738,778	$ 1,497	$ 1,158,900	$ 601,885	$ (23,504)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	321,404			321,404
Other comprehensive income (loss)	(3,894)				(3,894)
Purchase and retirement of common stock, shares		(6,185)
Purchase and retirement of common stock	(325,644)	$ (62)	(34,999)	(290,583)
Issuance of common stock under employee stock purchase plan, shares		73
Issuance of common stock under employee stock purchase plan	3,401	$ 1	3,400
Issuance of common stock upon exercise of stock options, shares		858
Issuance of common stock upon exercise of stock options	26,392	$ 9	26,383
Stock-based compensation	20,458		20,458
Dividends declared	(51,462)			(51,462)
Ending balance, shares at Sep. 30, 2020		144,491
Ending balance at Sep. 30, 2020	1,729,433	$ 1,445	1,174,142	581,244	(27,398)
Beginning balance, shares at Jun. 30, 2020		146,445
Beginning balance at Jun. 30, 2020	1,708,625	$ 1,464	1,174,411	566,929	(34,179)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	111,096			111,096
Other comprehensive income (loss)	6,781				6,781
Purchase and retirement of common stock, shares		(2,110)
Purchase and retirement of common stock	(108,742)	$ (22)	(11,939)	(96,781)
Issuance of common stock under employee stock purchase plan, shares		26
Issuance of common stock under employee stock purchase plan	1,153	$ 1	1,152
Issuance of common stock upon exercise of stock options, shares		130
Issuance of common stock upon exercise of stock options	4,053	$ 2	4,051
Stock-based compensation	6,467		6,467
Ending balance, shares at Sep. 30, 2020		144,491
Ending balance at Sep. 30, 2020	$ 1,729,433	$ 1,445	1,174,142	581,244	(27,398)
Beginning balance, shares at Dec. 31, 2020	143,396	143,396
Beginning balance at Dec. 31, 2020	$ 1,739,907	$ 1,434	1,190,001	565,270	(16,798)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	401,293			401,293
Other comprehensive income (loss)	(3,745)				(3,745)
Purchase and retirement of common stock, shares		(5,218)
Purchase and retirement of common stock	(316,053)	$ (53)	(30,979)	(285,021)
Issuance of common stock under employee stock purchase plan, shares		64
Issuance of common stock under employee stock purchase plan	3,225	$ 1	3,224
Issuance of common stock upon exercise of stock options, shares		1,063
Issuance of common stock upon exercise of stock options	34,677	$ 11	34,666
Stock-based compensation	31,173		31,173
Dividends declared	$ (52,389)			(52,389)
Ending balance, shares at Sep. 30, 2021	139,305	139,305
Ending balance at Sep. 30, 2021	$ 1,838,088	$ 1,393	1,228,085	629,153	(20,543)
Beginning balance, shares at Jun. 30, 2021		141,027
Beginning balance at Jun. 30, 2021	1,805,606	$ 1,410	1,219,487	599,231	(14,522)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	138,045			138,045
Other comprehensive income (loss)	(6,021)				(6,021)
Purchase and retirement of common stock, shares		(1,980)
Purchase and retirement of common stock	(119,895)	$ (21)	(11,751)	(108,123)
Issuance of common stock under employee stock purchase plan, shares		22
Issuance of common stock under employee stock purchase plan	1,120	$ 1	1,119
Issuance of common stock upon exercise of stock options, shares		236
Issuance of common stock upon exercise of stock options	7,915	$ 3	7,912
Stock-based compensation	$ 11,318		11,318
Ending balance, shares at Sep. 30, 2021	139,305	139,305
Ending balance at Sep. 30, 2021	$ 1,838,088	$ 1,393	$ 1,228,085	$ 629,153	$ (20,543)

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Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) - $ / shares		3 Months Ended		9 Months Ended
	Jun. 02, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared per common share (in USD per share)	$ 0.37	$ 0	$ 0	$ 0.37	$ 0.35

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Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income	$ 401,293	$ 321,404
Adjustments to reconcile net income to net cash provided by operating activities (See Note 1)	82,588	75,120
Net cash provided by operating activities	483,881	396,524
Cash flows from investing activities:
Additions to property and equipment	(22,520)	(43,113)
Additions to capitalized software	(19,486)	(18,640)
Purchases of marketable securities	(168,333)	(114,407)
Prepayments and maturities of marketable securities	133,895	112,575
Sales of marketable securities	327	842
Other investing activities	(11,425)	(1,500)
Net cash used in investing activities	(87,542)	(64,243)
Cash flows from financing activities:
Payment of contingent consideration	(3,965)	(633)
Purchase and retirement of common stock	(315,811)	(327,079)
Proceeds from issuance of common stock	37,902	29,793
Payment of dividends	(105,516)	(103,914)
Net cash used in financing activities	(387,390)	(401,833)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(2,442)	(4,196)
Net increase (decrease) in cash, cash equivalents and restricted cash	6,507	(73,748)
Cash, cash equivalents and restricted cash, beginning of period	787,727	844,547
Cash, cash equivalents and restricted cash, end of period	$ 794,234	$ 770,799

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Summary of Significant Accounting Policies

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Summary of Significant Accounting Policies

Nature of Operations

SEI Investments Company (the Company), a Pennsylvania corporation, provides comprehensive platforms, services and infrastructure—encompassing technology, operational, and investment management services—to help wealth managers, financial advisors, investment managers, family offices, institutional and private investors create and manage wealth.

Investment processing platforms provide technologies and business process outsourcing services for wealth managers and investment advisors. These solutions include investment advisory, client relationship, and other technology-enabled capabilities for the front office; administrative and investment services for the middle office; and accounting and processing services for the back office. Revenues from investment processing platforms are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment operations platforms provide business process outsourcing services for investment managers and asset owners. These platforms support a broad range of traditional and alternative investments and provide technology-enabled information analytics and investor capabilities for the front office; administrative and investment services for the middle office; and fund administration and accounting services for the back office. Revenues from investment operations platforms are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment management platforms provide comprehensive solutions for managing personal and institutional wealth. These platforms include goals-based investment strategies; SEI-sponsored investment products, including mutual funds, collective investment products, alternative investment portfolios and separately managed accounts (SMA); and other market-specific advice, technology and operational components. These platforms are offered to wealth managers as part of a complete goals-based investment program for their end-investors. For institutional investors, the Company provides Outsourced Chief Investment Officer (OCIO) solutions that include investment management programs, as well as advisory and administrative services. Revenues from investment management platforms are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Basis of Presentation

The accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America. Certain financial information and accompanying note disclosure normally included in the Company’s Annual Report on Form 10-K have been condensed or omitted. The interim financial information is unaudited but reflects all adjustments (consisting of only normal recurring adjustments) which are, in the opinion of management, necessary for a fair statement of financial position of the Company as of September 30, 2021, the results of operations for the three and nine months ended September 30, 2021 and 2020, and cash flows for the nine-months ended September 30, 2021 and 2020. These interim Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.

There have been no significant changes in significant accounting policies during the nine months ended September 30, 2021 as compared to the significant accounting policies described in the Company's Annual Report on Form 10-K for the year ended December 31, 2020.

Variable Interest Entities

The Company or its affiliates have created numerous investment products for its clients in various types of legal entity structures. The Company serves as the Manager, Administrator and Distributor for these investment products and may also serve as the Trustee for some of the investment products. The Company receives asset management, distribution, administration and custodial fees for these services. Clients are the equity investors and participate in proportion to their ownership percentage in the net income or loss and net capital gains or losses of the products, and, on liquidation, will participate in proportion to their ownership percentage in the remaining net assets of the products after satisfaction of outstanding liabilities. The Company has concluded that it is not the primary beneficiary of the entities and, therefore, is not required to consolidate any of the pooled investment vehicles for which it receives asset management, distribution, administration and custodial fees under the VIE model.

The Company is a party to expense limitation agreements with certain SEI-sponsored money market funds subject to Rule 2a-7 of the Investment Company Act of 1940 which establish a maximum level of ordinary operating expenses incurred by the fund in any fiscal year including, but not limited to, fees of the administrator or its affiliates. Under the terms of these

agreements, the Company waived $11,629 and $8,575 in fees during the three months ended September 30, 2021 and 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company waived $33,118 and $24,930, respectively, in fees.

Revenue Recognition

Revenue is recognized when the transfer of control of promised goods or services under the terms of a contract with customers are satisfied in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those promised goods or services. Certain portions of the Company’s revenues involve a third party in providing goods or services to its customers. In such circumstances, the Company must determine whether the nature of its promise to the customer is to provide the underlying goods or services (the Company is the principal in the transaction and reports the transaction gross) or to arrange for a third party to provide the underlying goods or services (the entity is the agent in the transaction and reports the transaction net). See Note 13 for related disclosures regarding revenue recognition.

Cash and Cash Equivalents

Cash and cash equivalents includes $332,657 and $347,082 at September 30, 2021 and December 31, 2020, respectively, primarily invested in SEI-sponsored open-ended money market mutual funds.

Restricted Cash

Restricted cash includes $250 and $3,000 at September 30, 2021 and December 31, 2020, respectively, segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $101 at September 30, 2021 and December 31, 2020 segregated in special reserve accounts for the benefit of customers of the Company’s broker-dealer subsidiary, SEI Investments Distribution Co. (SIDCO), in accordance with certain rules established by the Securities and Exchange Commission (SEC) for broker-dealers.

Capitalized Software

The Company capitalized $19,486 and $18,640 of software development costs during the nine months ended September 30, 2021 and 2020, respectively. The Company's software development costs primarily relate to significant enhancements to the SEI Wealth PlatformSM (SWP). The Company capitalized $19,387 and $17,208 of software development costs for significant enhancements to SWP during the nine months ended September 30, 2021 and 2020, respectively. As of September 30, 2021, the net book value of SWP was $241,262. The net book value includes $22,702 of capitalized software development costs in-progress associated with future releases of SWP. Capitalized software development costs in-progress associated with future releases of SWP were $13,409 as of December 31, 2020. SWP has a weighted average remaining life of 10.0 years. Amortization expense for SWP was $35,834 and $32,576 during the nine months ended September 30, 2021 and 2020, respectively.

Earnings per Share

The calculations of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 are:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net income	$	138,045	$	111,096	$	401,293	$	321,404
Shares used to compute basic earnings per common share	140,507,000		145,812,000		141,928,000		147,586,000
Dilutive effect of stock options	1,919,000		2,095,000		2,053,000		2,372,000
Shares used to compute diluted earnings per common share	142,426,000		147,907,000		143,981,000		149,958,000
Basic earnings per common share	$	0.98	$	0.76	$	2.83	$	2.18
Diluted earnings per common share	$	0.97	$	0.75	$	2.79	$	2.14

During the three months ended September 30, 2021 and 2020, employee stock options to purchase 11,347,000 and 8,813,000 shares of common stock with an average exercise price of $57.80 and $57.98, respectively, were outstanding but not included in the computation of diluted earnings per common share. During the nine months ended September 30, 2021 and 2020, employee stock options to purchase 11,531,000 and 8,342,000 shares of common stock with an average exercise price of $57.78 and $58.18, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three and nine month periods were not included in the computation of diluted earnings per common share because either the performance conditions have not been satisfied or would not have been satisfied if the reporting date was the end of the contingency period or the options' exercise price was greater than

the average market price of the Company’s common stock and the effect on diluted earnings per common share would have been anti-dilutive.

Reclassifications

Certain prior year amounts have been reclassified to conform to current year presentation.

Statements of Cash Flows

For purposes of the Consolidated Statements of Cash Flows, the Company considers investment instruments purchased with an original maturity of three months or less to be cash equivalents.

The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the nine months ended September 30:

	2021		2020
Net income	$	401,293	$	321,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	25,141		23,058
Amortization	43,749		39,417
Equity in earnings of unconsolidated affiliate	(103,420)		(86,488)
Distributions received from unconsolidated affiliate	110,559		107,180
Stock-based compensation	31,173		20,458
Provision for losses on receivables	1,569		109
Deferred income tax expense	(6,639)		(7,731)
Net (gain) loss from investments	(134)		1,310
Change in other long-term liabilities	2,103		(4,442)
Change in other assets	314		(965)
Contract costs capitalized, net of amortization	(482)		(2,842)
Other	921		(1,053)
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products	(4,537)		2,521
Receivables	(58,537)		(37,921)
Other current assets	(3,919)		(6,186)
Advances due from unconsolidated affiliate	51,422		12,641
(Decrease) increase in
Accounts payable	3,006		8,615
Accrued liabilities	(9,851)		8,809
Deferred revenue	150		(1,370)
Total adjustments	82,588		75,120
Net cash provided by operating activities	$	483,881	$	396,524

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Investment In Unconsolidated Affiliate

9 Months Ended

Sep. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

Investment In Unconsolidated Affiliate

Investment in Unconsolidated Affiliate

LSV Asset Management

The Company has an investment in LSV Asset Management (LSV), a registered investment advisor that provides investment advisory services primarily to institutions, including pension plans and investment companies. LSV is currently an investment sub-advisor for a limited number of SEI-sponsored investment products. The Company's partnership interest in LSV as of September 30, 2021 was 38.7%. The Company accounts for its interest in LSV using the equity method because of its less than 50% ownership. The Company’s interest in the net assets of LSV is reflected in Investment in unconsolidated affiliate on the accompanying Consolidated Balance Sheets and its interest in the earnings of LSV is reflected in Equity in earnings of unconsolidated affiliate on the accompanying Consolidated Statements of Operations.

At September 30, 2021, the Company’s total investment in LSV was $39,872. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $110,559 and $107,180 in the nine months ended September 30, 2021 and 2020, respectively. As such, the Company considers these distribution payments as returns on investment rather than returns of the Company's original investment in LSV and has therefore classified the associated cash inflows as an operating activity on the Consolidated Statements of Cash Flows.

The Company’s proportionate share in the earnings of LSV was $35,005 and $28,305 during the three months ended September 30, 2021 and 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company's proportionate share in the earnings of LSV was $103,420 and $86,488, respectively.

These tables contain condensed financial information of LSV:

Condensed Statement of Operations	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Revenues	$	115,728	$	94,902	$	342,957	$	289,546
Net income	90,365		70,440		266,805		220,184

Condensed Balance Sheets	September 30, 2021		December 31, 2020
Current assets	$	123,325	$	151,515
Non-current assets	4,426		4,296
Total assets	$	127,751	$	155,811
Current liabilities	$	69,349	$	77,077
Non-current liabilities	4,058		4,620
Partners’ capital	54,344		74,114
Total liabilities and partners’ capital	$	127,751	$	155,811

On April 1, 2021, LSV provided an interest in the partnership to select key employees which reduced the ownership percentage of each existing partner on a pro-rata basis. As a result, the Company's total partnership interest in LSV was reduced slightly to approximately 38.7% from approximately 38.8%.

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Composition of Certain Financial Statement Captions

9 Months Ended

Sep. 30, 2021

Items Included in Consolidated Statement of Financial Condition [Abstract]

Composition of Certain Financial Statement Captions

Composition of Certain Financial Statement Captions

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	September 30, 2021		December 31, 2020
Trade receivables	$	112,572	$	99,106
Fees earned, not billed	313,883		262,167
Other receivables	18,401		25,046
	444,856		386,319
Less: Allowance for doubtful accounts	(2,669)		(1,100)
	$	442,187	$	385,219

Fees earned, not billed represents receivables from contracts with customers earned but unbilled and results from timing differences between services provided and contractual billing schedules. These billing schedules generally provide for fees to be billed on a quarterly basis. In addition, certain fees earned from investment operations services are calculated based on assets under administration that have an extended valuation process. Billings to these clients occur once the asset valuation processes are completed.

Receivables from investment products on the accompanying Consolidated Balance Sheets primarily represent fees receivable for distribution, investment advisory, and administration services to various regulated investment companies and other investment products sponsored by SEI.

Property and Equipment

Property and Equipment on the accompanying Consolidated Balance Sheets consists of:

	September 30, 2021		December 31, 2020
Buildings	$	209,315	$	206,151
Equipment	150,945		141,820
Land	24,651		24,179
Purchased software	156,327		147,838
Furniture and fixtures	21,196		21,439
Leasehold improvements	21,838		21,604
Construction in progress	209		4,660
	584,481		567,691
Less: Accumulated depreciation	(400,679)		(378,639)
Property and Equipment, net	$	183,802	$	189,052

The Company recognized $25,141 and $23,058 in depreciation expense related to property and equipment for the nine months ended September 30, 2021 and 2020, respectively.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $34,263 and $33,781 as of September 30, 2021 and December 31, 2020, respectively. The Company deferred expenses related to contract costs of $2,932 and $2,521 during the three months ended September 30, 2021 and 2020, respectively. During the nine months ended September 30, 2021 and 2020, the Company deferred expenses related to contract costs of $6,978 and $7,270, respectively. Amortization expense related to deferred contract costs were $6,496 and $4,428 during the nine months ended September 30, 2021 and 2020, respectively, and are included in Compensation, benefits and other personnel on the accompanying Consolidated Statements of Operations. There was no impairment loss in relation to deferred contract costs during the nine months ended September 30, 2021.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	September 30, 2021		December 31, 2020
Accrued employee compensation	$	86,924	$	95,656
Accrued employee benefits and other personnel	11,743		18,770
Accrued consulting, outsourcing and professional fees	35,945		31,907
Accrued sub-advisory, distribution and other asset management fees	57,560		49,924
Accrued dividend payable	—		53,127
Other accrued liabilities	38,871		50,461
Total accrued liabilities	$	231,043	$	299,845

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Fair Value Measurements

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

Fair Value Measurements

The fair value of the Company’s financial assets and liabilities, except for the Company's investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the Company’s Level 1 financial assets consist mainly of investments in open-ended mutual funds that are quoted daily. Level 2 financial assets consist of GNMA mortgage-backed securities held by the Company's wholly-owned limited purpose federal thrift subsidiary, SEI Private Trust Company (SPTC), Federal Home Loan Bank (FHLB) and other U.S. government agency short-term notes held by SIDCO. The financial assets held by SIDCO were purchased as part of a cash management program requiring only short term, top-tier investment grade government and corporate securities. The financial assets held by SPTC are debt securities issued by GNMA and are backed by the full faith and credit of the U.S. government. These securities were purchased for the sole purpose of satisfying applicable regulatory requirements and have maturity dates which range from 2023 to 2041.

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived

from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

The valuation of the Company's Level 2 financial assets held by SIDCO and SPTC are based upon securities pricing policies and procedures utilized by third-party pricing vendors.

The pricing policies and procedures applied for our Level 1 and Level 2 financial assets during the nine months ended September 30, 2021 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2020. The Company had no Level 3 financial assets at September 30, 2021 or December 31, 2020 that were required to be measured at fair value on a recurring basis. Level 3 financial liabilities at September 30, 2021 and December 31, 2020 consist entirely of the estimated contingent consideration resulting from an acquisition (See Note 12). The fair value of the contingent consideration was determined using a Monte-Carlo simulation model. Key assumptions for the Monte-Carlo simulation model include expected revenues, expected volatility, risk-free rate and other factors. There were no transfers of financial assets between levels within the fair value hierarchy during the nine months ended September 30, 2021.

The fair value of certain financial assets of the Company was determined using the following inputs:

			Fair Value Measurements at the End of the Reporting Period Using
Assets	September 30, 2021		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	12,241	$	12,241	$	—
Available-for-sale debt securities	127,838		—		127,838
Fixed-income securities owned	31,770		—		31,770
Investment funds sponsored by LSV (1)	6,893
	$	178,742	$	12,241	$	159,608

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2020		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	12,142	$	12,142	$	—
Available-for-sale debt securities	93,277		—		93,277
Fixed-income securities owned	34,064		—		34,064
Investment funds sponsored by LSV (1)	6,166
	$	145,649	$	12,142	$	127,341

(1) The fair value amounts presented in the tables above are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the accompanying Consolidated Balance Sheets (See Note 5).

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Marketable Securities

9 Months Ended

Sep. 30, 2021

Marketable Securities [Abstract]

Marketable Securities

Marketable Securities

Marketable securities include investments in money market funds and commercial paper classified as cash equivalents, available-for-sale debt securities, investments in SEI-sponsored and non-SEI-sponsored mutual funds, equities, investments in funds sponsored by LSV and securities owned by SIDCO.

Cash Equivalents

Investments in money market funds and commercial paper classified as cash equivalents had a fair value of $453,628 and $462,624 at September 30, 2021 and December 31, 2020, respectively. There were no material unrealized or realized gains or losses from these investments during the nine months ended September 30, 2021 and 2020. Investments in money market funds and commercial paper are Level 1 assets.

Available for Sale and Equity Securities

Available For Sale and Equity Securities on the accompanying Consolidated Balance Sheets consist of: 

	At September 30, 2021
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	126,964	$	874	$	—	$	127,838
SEI-sponsored mutual funds	6,692		380		—		7,072
Equities and other mutual funds	4,932		237		—		5,169
	$	138,588	$	1,491	$	—	$	140,079

	At December 31, 2020
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	91,262	$	2,015	$	—	$	93,277
SEI-sponsored mutual funds	6,866		382		—		7,248
Equities and other mutual funds	4,421		473		—		4,894
	$	102,549	$	2,870	$	—	$	105,419

Net unrealized gains at September 30, 2021 of available-for-sale debt securities were $673 (net of income tax expense of $201). Net unrealized gains at December 31, 2020 of available-for-sale debt securities were $1,551 (net of income tax expense of $464). These net unrealized gains are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

There were gross realized losses of $861 and $582 from available-for-sale debt securities during the nine months ended September 30, 2021 and 2020, respectively. There were no gross realized gains from available-for-sale debt securities during the nine months ended September 30, 2021 and 2020. Realized losses from available-for-sale debt securities, including amounts reclassified from accumulated comprehensive loss, are reflected in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

There were gross realized gains of $714 and gross realized losses of $65 from mutual funds and equities during the nine months ended September 30, 2021. There were gross realized gains of $254 and gross realized losses of $250 from mutual funds and equities during the nine months ended September 30, 2020. Gains and losses from mutual funds and equities are reflected in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

Investments in Affiliated Funds

The Company has an investment in funds sponsored by LSV. The Company records this investment on the accompanying Consolidated Balance Sheets at fair value. Unrealized gains and losses from the change in fair value of these funds are recognized in Net (loss) gain from investments on the accompanying Consolidated Statements of Operations.

The funds had a fair value of $6,893 and $6,166 at September 30, 2021 and December 31, 2020, respectively. The Company recognized unrealized losses of $39 and unrealized gains of $458 during the three months ended September 30, 2021 and 2020, respectively, from the change in fair value of the funds. The Company recognized unrealized gains of $727 and unrealized losses of $781 during the nine months ended September 30, 2021 and 2020, respectively, from the change in fair value of the funds.

Securities Owned

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency securities with maturity dates less than one year. These investments are reflected as Securities owned on the accompanying Consolidated Balance Sheets. Due to specialized accounting practices applicable to investments by broker-dealers, the securities are reported at fair value and changes in fair value are recorded in current period earnings. The securities had a fair value of $31,770 and $34,064 at September 30, 2021 and December 31, 2020, respectively. There were no material net gains or losses related to the securities during the three and nine months ended September 30, 2021 and 2020.

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Line of Credit

9 Months Ended

Sep. 30, 2021

Line of Credit Facility [Abstract]

Line of Credit

Line of Credit

On April 23, 2021 (the Closing Date), the Company entered into a new five-year $325,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, N.A., and a syndicate of other lenders. The Credit Facility became available on the Closing Date and replaced the former credit facility agreement (the 2016 Credit Facility). The Credit Facility is scheduled to expire in April 2026, at which time any aggregate principal amount of loans outstanding becomes payable in full. Any borrowings made under the Credit Facility will accrue interest at rates that, at the Company's option, are based on a base rate (the Base Rate) plus a premium that can range from 0.25% to 1.00% or the London InterBank Offered Rate (LIBOR) plus a premium that can range from 1.25% to 2.00% depending on the Company’s Leverage Ratio (a ratio of consolidated indebtedness to consolidated EBITDA for the four preceding fiscal quarters, all as defined in the related agreement). The Base Rate is defined as the highest of a) the Federal Funds Rate, as published by the Federal Reserve Bank of New York, plus 0.50%, b) the prime commercial lending rate of Wells Fargo, c) the applicable LIBOR plus 1.00%, or d) 0%. The Credit Facility includes fallback language clearly defining an alternative reference rate which provides for specified replacement rates upon a LIBOR cessation event. At the time of a LIBOR cessation event, the replacement rate, the Secured Overnight Financing Rate (SOFR), self-executes without the need for negotiations or a formal amendment process.

The Company also pays quarterly commitment fees based on the unused portion of the Credit Facility. The quarterly fees for the Credit Facility can range from 0.15% of the amount of the unused portion to 0.30%, depending on the Company’s Leverage Ratio. Certain wholly-owned subsidiaries of the Company have guaranteed the obligations of the Company under the agreement. The aggregate amount of the Credit Facility may be increased by an additional $100,000 under certain conditions set forth in the agreement. The Company may issue up to $15,000 in letters of credit under the terms of the Credit Facility. The Company pays a periodic commission fee of 1.25% plus an issuance fee of 0.200% of the aggregate face amount of the outstanding letters of credit issued under the Credit Facility.

The Credit Facility contains covenants with restrictions on the ability of the Company to do transactions with affiliates other than wholly-owned subsidiaries or to incur liens or certain types of indebtedness as defined in the agreement. In the event of a default under the Credit Facility, the Company would also be restricted from paying dividends on, or repurchasing, its common stock without the approval of the lenders. Upon the occurrence of certain financial or economic events, significant corporate events, or certain other events of default constituting an event of default under the Credit Facility, all loans outstanding may be declared immediately due and payable and all commitments under the agreement may be terminated.

As of September 30, 2021, the Company had outstanding letters of credit of $5,808 under the Credit Facility. These letters of credit were issued primarily for the expansion of the Company's headquarters and are scheduled to expire during 2021. The amount of the Credit Facility that is available for general corporate purposes as of September 30, 2021 was $319,192.

The Company was in compliance with all covenants of the credit facilities during the nine months ended September 30, 2021.

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Shareholders' Equity

9 Months Ended

Sep. 30, 2021

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ Equity

Stock-Based Compensation

The Company has only non-qualified stock options outstanding under its equity compensation plans. All outstanding stock options have performance-based vesting provisions specific to each option grant that tie the vesting of the applicable stock options to the Company’s financial performance. The Company’s stock options vest at a rate of 50% when a specified financial vesting target is achieved, and the remaining 50% when a second, higher specified financial vesting target is achieved. Options vest as a result of achievement of the financial vesting targets. Options granted in December 2017 and thereafter include a service condition which requires a minimum two or four year waiting period from the grant date along with the attainment of the applicable financial vesting target. The targets are measured annually on December 31. The amount of stock-based compensation expense recognized in the period is based upon management’s

estimate of when the financial vesting targets may be achieved. Any change in management’s estimate could result in the remaining amount of stock-based compensation expense to be accelerated, spread out over a longer period, or reversed. This may cause volatility in the recognition of stock-based compensation expense in future periods and could materially affect the Company’s earnings.

The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three and nine months ended September 30, 2021 and 2020, respectively, as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Stock-based compensation expense	$	11,318	$	6,467	$	31,173	$	20,458
Less: Deferred tax benefit	(1,857)		(1,229)		(5,615)		(3,932)
Stock-based compensation expense, net of tax	$	9,461	$	5,238	$	25,558	$	16,526

The Company revised its estimates of when some vesting targets are expected to be achieved during 2021 and 2020. The change in management's estimate during the nine months ended September 30, 2021 resulted in an increase of $3,209 in stock-based compensation expense. The change in estimate during the nine months ended September 30, 2020 did not result in a material change to the Company's stock-based compensation expense.

As of September 30, 2021, there was approximately $72,399 of unrecognized compensation cost remaining related to unvested employee stock options that management expects will vest and is being amortized.

The Company issues new common shares associated with the exercise of stock options. The total intrinsic value of options exercised during the nine months ended September 30, 2021 was $30,496. The total options exercisable as of September 30, 2021 had an intrinsic value of $104,146. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of September 30, 2021 and the weighted average exercise price of the options. The market value of the Company’s common stock as of September 30, 2021 was $59.30 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of September 30, 2021 was $40.63. Total options that were outstanding as of September 30, 2021 were 16,925,000. Total options that were exercisable as of September 30, 2021 were 5,578,000.

Common Stock Buyback

The Company’s Board of Directors, under multiple authorizations, has authorized the repurchase of common stock on the open market or through private transactions. The Company purchased 5,218,000 shares at a total cost of $316,053 during the nine months ended September 30, 2021, which reduced the total shares outstanding of common stock. The cost of stock purchases during the period includes the cost of certain transactions that settled in the following quarter. As of September 30, 2021, the Company had approximately $126,775 of authorization remaining for the purchase of common stock under the program.

The Company immediately retires its common stock when purchased. Upon retirement, the Company reduces Capital in excess of par value for the average capital per share outstanding and the remainder is charged against Retained earnings. If the Company reduces its Retained earnings to zero, any subsequent purchases of common stock will be charged entirely to Capital in excess of par value.

Cash Dividend

On June 2, 2021, the Board of Directors declared a cash dividend of $0.37 per share on the Company's common stock, which was paid on June 22, 2021, to shareholders of record on June 14, 2021. Cash dividends declared during the nine months ended September 30, 2021 and 2020 were $52,389 and $51,462, respectively.

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Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Loss

The components of Accumulated other comprehensive loss, net of tax, are as follows: 

	Foreign Currency Translation Adjustments		Unrealized Gains (Losses) on Investments		Accumulated Other Comprehensive Loss
Balance, January 1, 2021	$	(18,349)	$	1,551	$	(16,798)
Other comprehensive loss before reclassifications	(2,867)		(1,548)		(4,415)
Amounts reclassified from accumulated other comprehensive loss	—		670		670
Net current-period other comprehensive loss	(2,867)		(878)		(3,745)
Balance, September 30, 2021	$	(21,216)	$	673	$	(20,543)

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Business Segment Information

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Business Segment Information

Business Segment Information

The Company’s reportable business segments are:

Private Banks – Provides outsourced investment processing and investment management platforms to banks and trust institutions, independent wealth advisers and financial advisors worldwide;

Investment Advisors – Provides investment management and investment processing platforms to affluent investors through a network of independent registered investment advisors, financial planners and other investment professionals in the United States;

Institutional Investors – Provides OCIO solutions, including investment management and administrative outsourcing platforms to retirement plan sponsors, healthcare systems, higher education and other not-for-profit organizations worldwide;

Investment Managers – Provides investment operations outsourcing platforms to fund companies, banking institutions, traditional and non-traditional investment managers worldwide and family offices in the United States; and

Investments in New Businesses – Focuses on providing investment management solutions to ultra-high-net-worth families residing in the United States; developing network and data protection services; modularizing larger technology platforms into stand-alone components; entering new markets; and conducting other research and development activities.

The information in the following tables is derived from internal financial reporting used for corporate management purposes. There are no inter-segment revenues for the three and nine months ended September 30, 2021 and 2020. Management evaluates Company assets on a consolidated basis during interim periods. The accounting policies of the reportable business segments are the same as those described in Note 1 to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.

The following tables highlight certain financial information about each of the business segments for the three months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2021
Revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322
Expenses	116,679		62,107		41,643		89,594		12,820		322,843
Operating profit (loss)	$	6,339	$	62,661	$	44,116	$	57,818	$	(8,455)	$	162,479

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2020
Revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927
Expenses	113,066		51,519		37,812		79,838		13,315		295,550
Operating profit (loss)	$	1,726	$	51,670	$	41,771	$	44,008	$	(9,798)	$	129,377

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the three months ended September 30, 2021 and 2020 is as follows:

	2021		2020
Total operating profit from segments	$	162,479	$	129,377
Corporate overhead expenses	(21,354)		(18,040)
Income from operations	$	141,125	$	111,337

The following tables provide additional information for the three months ended September 30, 2021 and 2020 pertaining to the business segments:

	Capital Expenditures (1)				Depreciation
	2021		2020		2021		2020
Private Banks	$	6,173	$	7,652	$	4,980	$	4,222
Investment Advisors	2,896		3,234		499		1,255
Institutional Investors	720		698		271		298
Investment Managers	3,722		2,776		2,428		1,818
Investments in New Businesses	336		144		60		97
Total from business segments	$	13,847	$	14,504	$	8,238	$	7,690
Corporate overhead	419		274		170		255
	$	14,266	$	14,778	$	8,408	$	7,945

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2021		2020
Private Banks	$	8,526	$	7,505
Investment Advisors	3,014		2,683
Institutional Investors	427		426
Investment Managers	2,451		2,343
Investments in New Businesses	185		186
Total from business segments	$	14,603	$	13,143
Corporate overhead	71		57
	$	14,674	$	13,200

The following tables highlight certain financial information about each of business segment for the nine months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2021
Revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659
Expenses	345,057		176,267		122,696		257,609		39,855		941,484
Operating profit (loss)	$	19,245	$	181,191	$	133,261	$	169,030	$	(27,552)	$	475,175

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2020
Revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335
Expenses	331,442		154,100		113,016		228,795		37,691		865,044
Operating profit (loss)	$	4,297	$	145,118	$	122,293	$	131,020	$	(27,437)	$	375,291

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the nine months ended September 30, 2021 and 2020:

	2021		2020
Total operating profit from segments	$	475,175	$	375,291
Corporate overhead expenses	(65,192)		(53,414)
Income from operations	$	409,983	$	321,877

The following tables provide additional information for the nine months ended September 30, 2021 and 2020:

	Capital Expenditures (1)				Depreciation
	2021		2020		2021		2020
Private Banks	$	20,596	$	24,211	$	13,290	$	12,069
Investment Advisors	8,784		12,427		3,205		3,578
Institutional Investors	2,115		3,085		982		901
Investment Managers	8,726		19,067		6,508		5,499
Investments in New Businesses	788		894		306		243
Total from business segments	$	41,009	$	59,684	$	24,291	$	22,290
Corporate Overhead	997		2,069		850		768
	$	42,006	$	61,753	$	25,141	$	23,058

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2021		2020
Private Banks	$	25,735	$	22,390
Investment Advisors	8,550		7,999
Institutional Investors	1,280		1,280
Investment Managers	7,375		7,020
Investments in New Businesses	555		556
Total from business segments	$	43,495	$	39,245
Corporate Overhead	254		172
	$	43,749	$	39,417

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Income Taxes

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Income Taxes

Income TaxesThe gross liability for unrecognized tax benefits at September 30, 2021 and December 31, 2020 was $16,721 and $15,911, respectively, exclusive of interest and penalties, of which $16,532 and $15,761 would affect the effective tax rate if the Company were to recognize the tax benefit.

The Company classifies interest and penalties on unrecognized tax benefits as income tax expense. As of September 30, 2021 and December 31, 2020, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $1,835 and $2,105, respectively.

	September 30, 2021		December 31, 2020
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	16,721	$	15,911
Interest and penalties on unrecognized benefits	1,835		2,105
Total gross uncertain tax positions	$	18,556	$	18,016
Amount included in Current liabilities	$	4,497	$	6,546
Amount included in Other long-term liabilities	14,059		11,470
	$	18,556	$	18,016

The effective income tax rate for the three and nine months ended September 30, 2021 and 2020 differs from the federal income tax statutory rate due to the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Statutory rate	21.0	%	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.5		3.3		3.0		3.2
Foreign tax expense and tax rate differential	(0.1)		(0.2)		(0.1)		(0.1)
Tax benefit from stock option exercises	(0.6)		(0.4)		(1.0)		(1.0)
Expiration of the statute of limitations	—		(1.3)		—		(0.5)
State settlements	(0.3)		—		(0.2)		—
Provision-to-return adjustment	(0.5)		(0.4)		(0.2)		(0.1)
Other, net	(0.3)		(0.6)		(0.3)		(0.5)
	21.7	%	21.4	%	22.2	%	22.0	%

The Company files income tax returns in the United States on a consolidated basis and in many U.S. state and foreign jurisdictions. The Company is subject to examination of income tax returns by the Internal Revenue Service (IRS) and other domestic and foreign tax authorities. The Company is no longer subject to U.S. federal income tax examination for years before 2017 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2015.

The Company estimates it will recognize $4,497 of gross unrecognized tax benefits. This amount is expected to be paid within one year or to be removed at the expiration of the statute of limitations and resolution of income tax audits and is netted against the current payable account. These unrecognized tax benefits are related to tax positions taken on certain federal, state, and foreign tax returns. However, the timing of the resolution of income tax examinations is highly uncertain, and the amounts ultimately paid, if any, upon resolution of the issues raised by the taxing authorities may differ materially from the amounts accrued for each year. While it is reasonably possible that some issues under examination could be resolved in the next twelve months, based upon the current facts and circumstances, the Company cannot reasonably estimate the timing of such resolution or the total range of potential changes as it relates to the current unrecognized tax benefits that are recorded as part of the Company’s financial statements.

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Commitments and Contingencies

9 Months Ended

Sep. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Commitments and Contingencies

In the ordinary course of business, the Company from time to time enters into contracts containing indemnification obligations of the Company. These obligations may require the Company to make payments to another party upon the occurrence of certain events including the failure by the Company to meet its performance obligations under the contract. These contractual indemnification provisions are often standard contractual terms of the nature customarily found in the type of contracts entered into by the Company. In many cases, there are no stated or notional amounts included in the indemnification provisions. There are no amounts reflected on the Consolidated Balance Sheets as of September 30, 2021 and December 31, 2020 related to these indemnifications.

Stanford Trust Company Litigation

SEI has been named in seven lawsuits filed in Louisiana courts; four of the cases also name SPTC as a defendant. The underlying allegations in all actions relate to the purported role of SPTC in providing back-office services to Stanford Trust

Company. The complaints allege that SEI and SPTC participated in some manner in the sale of “certificates of deposit” issued by Stanford International Bank so as to be a “seller” of the certificates of deposit for purposes of primary liability under the Louisiana Securities Law or so as to be secondarily liable under that statute for sales of certificates of deposit made by Stanford Trust Company. Two of the actions also include claims for violations of the Louisiana Racketeering Act and possibly conspiracy, and a third also asserts claims of negligence, breach of contract, breach of fiduciary duty, violations of the uniform fiduciaries law, negligent misrepresentation, detrimental reliance, violations of the Louisiana Racketeering Act, and conspiracy.

The procedural status of the seven cases varies. The Lillie case, filed originally in the 19th Judicial District Court for the Parish of East Baton Rouge, was brought as a class action. A group of plaintiffs who opted out of the Lillie class filed a complaint against SEI and SPTC in the United States District Court in the Middle District of Louisiana, alleging claims essentially the same as those in Lillie. In both cases, as a result of the proceedings in the Northern District of Texas, only the plaintiffs’ secondary liability claims under Section 714(B) of the Louisiana Securities Law remain. On January 31, 2019, the Judicial Panel on Multidistrict Litigation remanded the Lillie and Ahders proceedings to the Middle District of Louisiana.

With respect to the Lillie proceeding, on July 9, 2019, the District Court issued an order granting SEI’s Summary Judgment Motion to dismiss the remaining Section 714(B) claim and denying Plaintiffs’ Motion for Continuance of SEI and SPTC’s Motion for Summary Judgment pursuant to Rule 56(d). On August 27, 2019, Plaintiffs-Appellants filed a Notice of Appeal to the United States Court of Appeals for the Fifth Circuit of the District Court's dismissal of the Lillie matter. On May 14, 2021, the United States Court of Appeals for the Fifth Circuit unanimously affirmed the District Court’s order granting summary judgment in favor SEI and the Insurer Defendants in the Lillie matter.

With respect to the Ahders proceeding, on January 24, 2020, the District Court issued an order granting SEI’s Summary Judgment Motion to dismiss the remaining Section 714(B) claim. On March 17, 2020, Plaintiffs-Appellants filed a Notice of Appeal to the United States Court of Appeals for the Fifth Circuit of the District Court's dismissal of the Ahders matter. On December 3, 2020, the United States Court of Appeals for the Fifth Circuit unanimously affirmed the District Court’s order granting summary judgment in favor of SEI and the Insurer Defendants in the Adhers matter.

Another case, filed in the 23rd Judicial District Court for the Parish of Ascension, also was removed to federal court and transferred by the Judicial Panel on Multidistrict Litigation to the Northern District of Texas and the Stanford MDL. The schedule for responding to that Complaint has not yet been established.

Two additional cases remain in the Parish of East Baton Rouge. Plaintiffs filed petitions in 2010 and have granted SEI and SPTC indefinite extensions to respond. No material activity has taken place since.

In two additional cases, filed in East Baton Rouge and brought by the same counsel who filed the Lillie action, virtually all of the litigation to date has involved motions practice and appellate litigation regarding the existence of federal subject matter jurisdiction under the federal Securities Litigation Uniform Standards Act (SLUSA). The matters were removed to the United States District Court for the Northern District of Texas and consolidated. The court then dismissed the action under SLUSA. The Court of Appeals for the Fifth Circuit reversed that order, and the Supreme Court of the United States affirmed the Court of Appeals judgment on February 26, 2014. The matters were remanded to state court and no material activity has taken place since that date.

While the outcome of this litigation remains uncertain, SEI and SPTC believe that they have valid defenses to plaintiffs' claims and intend to defend the lawsuits vigorously. Because of uncertainty in the make-up of the Lillie class, the specific theories of liability that may survive a motion for summary judgment or other dispositive motion, the relative lack of discovery regarding damages, causation, mitigation and other aspects that may ultimately bear upon loss, the Company is not reasonably able to provide an estimate of loss, if any, with respect to the foregoing lawsuits.

SS&C Advent Matter

On February 28, 2020, SEI Global Services, Inc. (SGSI), a wholly-owned subsidiary of the Company, filed a complaint under seal in the United States District Court for the Eastern District of Pennsylvania against SS&C Advent (Advent) and SS&C Technologies Holdings, Inc. (SS&C) alleging that SS&C and Advent breached the terms of the contract between the parties and asking the Court to hold SS&C and Advent to their bargained-for obligations (the Advent Matter). In addition to Breach of Contract, the complaint also includes counts for Declaratory Judgment, Tortious Interference with Existing and Prospective Contractual Relations, Violation of the New York General Business Law Section 349, Violations of Section 2 of the Sherman Antitrust Act, Promissory Estoppel and Breach of the Covenant of Good Faith and Fair Dealing. SGSI seeks various forms of relief, including declaratory judgment, specific performance under the contract, and monetary damages, including treble damages and attorney’s fees.

Following various procedural actions, including an amendment of SGSI’s complaint to include additional breach of contract claims, Advent filed a motion to dismiss SGSI’s complaint.

On October 23, 2020, the United States District Court for the Eastern District of Pennsylvania dismissed SEI’s federal antitrust claims and declined to rule on the state law claims on the basis that in the absence of the anti-trust claim, the court had no jurisdiction over the state law claims. SGSI has appealed the dismissal of the federal anti-trust claims to the Third Circuit Court of Appeals, which is currently pending.

Since October 23, 2020, Advent and SGSI have been litigating the remaining breach of contract and tortious interference with contract claims in New York State Court. Additionally, SGSI made motions for injunctive relief to insure that Advent provided SGSI with access to the Geneva, Moxy and APX software modules as SGSI believes is required pursuant to the terms of a valid contract. On January 13, 2021, Judge Borrok of the Supreme Court of the State of New York, granted SGSI’s motion for injunctive relief and issued an Order in which he characterized the basis for Advent’s claim for breach of contract as appearing to be “pre-textual” and found that SGSI’s claims for breach of contract would likely succeed on the merits. Judge Borrok granted SGSI’s motion for injunctive relief, on a preliminary basis, and precluded SS&C Advent from:

•    Dishonoring their contractual obligations and commitments under the SLSA, including, denying SEI’s licenses, rights, and privileges under the SLSA;

•    Failing to provide new license keys for the license keys due to Geneva, Moxy, and APX, and other software products licensed by SEI pursuant to the SLSA (such new license keys to be provided no later than January 15, 2021 at 10 A.M.);

•    Denying to SEI any and all access to the Geneva, Moxy, and APX software and related modules as are reasonably necessary to provide access to such software to SEI’s clients; and

•    Denying to SEI any and all support, maintenance and technical support services for Geneva, Moxy, and APX.

SS&C Advent provided SEI with the necessary access to the Geneva, Moxy and APX software modules on January 14, 2021. These have been tested, verified and are now running in the SEI production environment.

On January 15, 2021, SS&C Advent appealed Judge Borrok’s order granting SEI’s motion for preliminary injunctive relief to the Appellate Division of the Supreme Court of the State of New York, First Department. The Appellate Division affirmed the injunction order on June 15, 2021.

On March 1, 2021, SS&C Advent moved to dismiss SGSI’s breach of contract and tortious interference with contract counter claims. These counter-claims were:

1.breach of contract,

2.declaratory judgment,

3.tortious interference with existing and prospective contractual relations,

4.deceptive trade practices in violation of NY Statutes,

5.breach of the covenant of good faith and fair dealing, and

6.promissory estoppel.

The parties agreed to toll the litigation while endeavoring to resolve their dispute through a settlement mediation process moderated by Judge Borrock. The parties were unable to reach an agreement as to a settlement of the litigation and reengaged in the litigation process.

On October 5, 2021, Judge Borrock issued an order partially denying and partially granting SS&C’s Advent’s motion to dismiss SGSI’s breach of contract and tortious interference with contract counter claims.

Judge Borrock dismissed the third claim with respect to prospective contractual relationships only, as well as the fourth claim and the sixth claim. The remaining claims that will proceed are:

1.breach of contract,

2.declaratory judgment,

3.tortious interference with existing a contractual relations, and

4.breach of the covenant of good faith and fair dealing.

We expect that the parties will also reengage with respect to SGSI’s pending appeal in the Third Circuit of the dismissal of SGSI’s anti-trust-claims.

SEI continues to believe that it will have to change providers under the current terms of its contract with SS&C Advent and that the process of litigating its rights under this contract may be a multi-year process. Consequently, SEI does not believe

that the Advent Matter will create any consequence to the services SGSI provides to its clients in the near term. SEI believes that it has alternatives available to it that will enable it to continue to provide currently provided services to its clients in all material respects in the unlikely event that there ultimately is a negative outcome in the Advent Matter.

SEI believes SGSI has a strong basis for proving the actions it alleges in the Advent Matter and looks forward to the opportunity to continue to assert its rights under contract and prove the damages that it has suffered as a consequence of the behavior by SS&C Advent that SGSI alleges. SEI expects the financial impact of litigating the Advent Matter to be immaterial.

Other Matters

The Company and certain of its subsidiaries are party to various other examinations, investigations, actions and claims arising in the normal course of business that the Company does not believe are material. The Company believes that the ultimate resolution of these matters will not have a material adverse effect on the Company's financial position or the manner in which the Company conducts its business. Currently, the Company does not believe the amount of losses associated with these matters can be estimated. While the Company does not believe that the amount of such losses will, when liquidated or estimable, be material to its financial position, the assumptions may be incorrect and any such loss could have a material adverse effect on the Company's results of operations or the manner in which the Company conducts its business in the period(s) during which the underlying matters are resolved.

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Goodwill and Intangible Assets

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

On April 2, 2018, the Company acquired all ownership interests of Huntington Steele, LLC (Huntington Steele). The total purchase price was allocated to Huntington Steele’s net tangible and intangible assets based upon their estimated fair values at the date of purchase. The excess purchase price over the value of the identifiable intangible assets was recorded as goodwill. The total amount of goodwill from this transaction amounted to $11,499 and is included on the accompanying Consolidated Balance Sheets. The total purchase price for Huntington Steele included a contingent purchase price payable to the sellers upon the attainment of specified financial measures determined at various intervals occurring between 2019 and 2023. The Company made payments of $3,965 and $633 during the nine months ended September 30, 2021 and 2020, respectively, to the sellers. As of September 30, 2021, the current portion of the contingent consideration of $765 is included in Accrued liabilities on the accompanying Balance Sheet. The long-term portion of the contingent consideration of $8,099 is included in Other long-term liabilities on the accompanying Balance Sheet.

In July 2017, the Company acquired all ownership interests of Archway Technology Partners, LLC, Archway Finance & Operations, Inc. and Keystone Capital Holdings, LLC (collectively, Archway), a provider of operating technologies and services to the family office industry. The total purchase price was allocated to Archway’s net tangible and intangible assets based upon their estimated fair values at the date of purchase. The excess purchase price over the value of the net tangible and identifiable intangible assets was recorded as goodwill. The total amount of goodwill from this transaction amounted to $52,990 and is included on the accompanying Consolidated Balance Sheets.

There were no changes to goodwill during the nine months ended September 30, 2021.

The Company recognized $2,763 of amortization expense related to the intangible assets acquired through acquisitions of Huntington Steele and Archway during the nine months ended September 30, 2021 and 2020.

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Revenues from Contracts with Customers

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenues from Contracts with Customers

Revenues from Contracts with Customers

The Company’s principal sources of revenues are: (1) asset management, administration and distribution fees primarily earned based upon a contractual percentage of net assets under management or administration; and (2) information processing and software servicing fees that are either recurring and primarily earned based upon the number of trust accounts being serviced or a percentage of the market value of the clients' assets processed on the Company's platforms, or non-recurring and based upon project-oriented contractual agreements related to client implementations.

Disaggregation of Revenue

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the business segments for the three months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2021
Investment management fees from pooled investment products	$	34,212	$	77,123	$	13,639	$	32	$	338	$	125,344
Investment management fees from investment management agreements	605		41,688		71,964		—		3,864		118,121
Investment operations fees	363		—		—		136,978		—		137,341
Investment processing fees - PaaS	54,191		—		—		—		—		54,191
Investment processing fees - SaaS	28,579		—		—		3,848		—		32,427
Professional services fees	4,174		—		—		871		—		5,045
Account fees and other	894		5,957		156		5,683		163		12,853
Total revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322
Primary Geographic Markets:
United States	$	77,260	$	124,768	$	68,810	$	136,934	$	4,365	$	412,137
United Kingdom	28,767		—		13,327		—		—		42,094
Canada	12,343		—		926		—		—		13,269
Ireland	4,648		—		2,570		10,478		—		17,696
Other	—		—		126		—		—		126
Total revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2020
Investment management fees from pooled investment products	$	32,256	$	68,287	$	13,417	$	180	$	356	$	114,496
Investment management fees from investment management agreements	421		29,761		65,811		—		3,041		99,034
Investment operations fees	446		—		—		113,037		—		113,483
Investment processing fees - PaaS	47,393		—		—		—		—		47,393
Investment processing fees - SaaS	27,567		—		—		3,479		—		31,046
Professional services fees	5,663		—		—		2,016		—		7,679
Account fees and other	1,046		5,141		355		5,134		120		11,796
Total revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927
Primary Geographic Markets:
United States	$	74,633	$	103,189	$	62,699	$	116,196	$	3,517	$	360,234
United Kingdom	25,234		—		12,930		—		—		38,164
Canada	10,596		—		1,298		—		—		11,894
Ireland	4,329		—		2,526		7,650		—		14,505
Other	—		—		130		—		—		130
Total revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the nine months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2021
Investment management fees from pooled investment products	$	100,484	$	224,816	$	41,365	$	105	$	993	$	367,763
Investment management fees from investment management agreements	1,681		114,747		213,249		—		10,811		340,488
Investment operations fees	1,134		—		—		394,401		—		395,535
Investment processing fees - PaaS	160,813		—		—		—		—		160,813
Investment processing fees - SaaS	84,831		—		—		11,409		—		96,240
Professional services fees	12,509		—		—		2,885		—		15,394
Account fees and other	2,850		17,895		1,343		17,839		499		40,426
Total revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659
Primary Geographic Markets:
United States	$	231,203	$	357,458	$	203,322	$	396,598	$	12,303	$	1,200,884
United Kingdom	83,514		—		41,091		—		—		124,605
Canada	35,977		—		3,426		—		—		39,403
Ireland	13,608		—		7,735		30,041		—		51,384
Other	—		—		383		—		—		383
Total revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2020
Investment management fees from pooled investment products	$	95,407	$	200,718	$	39,628	$	536	$	1,063	$	337,352
Investment management fees from investment management agreements	1,060		83,726		194,445		—		8,912		288,143
Investment operations fees	1,359		—		—		328,316		—		329,675
Investment processing fees - PaaS	137,737		—		—		—		—		137,737
Investment processing fees - SaaS	84,783		—		—		10,122		—		94,905
Professional services fees	11,535		—		—		4,674		—		16,209
Account fees and other	3,858		14,774		1,236		16,167		279		36,314
Total revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335
Primary Geographic Markets:
United States	$	220,254	$	299,218	$	185,202	$	335,776	$	10,254	$	1,050,704
United Kingdom	71,938		—		38,034		—		—		109,972
Canada	30,723		—		4,327		—		—		35,050
Ireland	12,824		—		7,321		24,039		—		44,184
Other	—		—		425		—		—		425
Total revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335

Investment management fees from pooled investment products - Revenues associated with clients' assets invested in Company-sponsored pooled investment products. Contractual fees are stated as a percentage of the market value of

assets under management and collected on a monthly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment management fees from investment management agreements - Revenues based on assets of clients of the Institutional Investors segment primarily invested in Company-sponsored products. Each client is charged an investment management fee that is stated as a percentage of the market value of all assets under management. The client is billed directly on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Revenues associated with the separately managed account program offered through registered investment advisors located throughout the United States. The contractual fee is stated as a percentage of the market value of all assets invested in the separately managed account and collected on a quarterly basis. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment operations fees - Revenues earned from accounting and administrative services, distribution support services and regulatory and compliance services to investment management firms and family offices. The Company contracts directly with the investment management firm or family office. The contractual fees are stated as a percentage of net assets under administration and billed when asset valuations are finalized. Revenues are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment processing fees - Platform as a Service - Revenues associated with clients that outsource their entire investment operation and back-office processing functions. Through the use of the Company's proprietary platforms, the Company assumes all back-office investment processing services including investment processing, custody and safekeeping of assets, income collections, securities settlement and other related trust activities. The contractual fee is based on either a monthly fee or a percentage of the value of assets processed on the Company's platforms each month as long as the fee is in excess of a monthly contractual minimum. The contractual fee may also include additional fees determined on a per-account or per-transaction basis. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment processing fees - Software as a Service - Revenues associated with clients that outsource investment processing technology software and computer processing by accessing our proprietary software and data center remotely but retain responsibility for all investment operations, client administration and other back-office trust operations. The contractual fee is based on a monthly fee plus additional fees determined on a per-account or per-transaction basis. The client is billed directly on a monthly basis. Revenues are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Professional services fees - Revenues associated with the business services migration for investment processing clients of the Private Banks segment and investment operations clients of the Investment Managers segment. In addition, Professional services include other services such as business transformation consulting. Typically, fees are stated as a contractual fixed fee. The client is billed directly and fees are collected according to the terms of the agreement.

Account fees and other - Revenues associated with custody account servicing, account terminations, reimbursements received for out-of-pocket expenses, and other fees for the provision of ancillary services.

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Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Basis of Presentation

Basis of PresentationThe accompanying Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America.

Variable Interest Entities

Variable Interest Entities

The Company or its affiliates have created numerous investment products for its clients in various types of legal entity structures. The Company serves as the Manager, Administrator and Distributor for these investment products and may also serve as the Trustee for some of the investment products. The Company receives asset management, distribution, administration and custodial fees for these services. Clients are the equity investors and participate in proportion to their ownership percentage in the net income or loss and net capital gains or losses of the products, and, on liquidation, will participate in proportion to their ownership percentage in the remaining net assets of the products after satisfaction of outstanding liabilities. The Company has concluded that it is not the primary beneficiary of the entities and, therefore, is not required to consolidate any of the pooled investment vehicles for which it receives asset management, distribution, administration and custodial fees under the VIE model.

The Company is a party to expense limitation agreements with certain SEI-sponsored money market funds subject to Rule 2a-7 of the Investment Company Act of 1940 which establish a maximum level of ordinary operating expenses incurred by the fund in any fiscal year including, but not limited to, fees of the administrator or its affiliates.

Revenue Recognition

Revenue RecognitionRevenue is recognized when the transfer of control of promised goods or services under the terms of a contract with customers are satisfied in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those promised goods or services. Certain portions of the Company’s revenues involve a third party in providing goods or services to its customers. In such circumstances, the Company must determine whether the nature of its promise to the customer is to provide the underlying goods or services (the Company is the principal in the transaction and reports the transaction gross) or to arrange for a third party to provide the underlying goods or services (the entity is the agent in the transaction and reports the transaction net).

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents includes $332,657 and $347,082 at September 30, 2021 and December 31, 2020, respectively, primarily invested in SEI-sponsored open-ended money market mutual funds.

Statements of Cash Flows

For purposes of the Consolidated Statements of Cash Flows, the Company considers investment instruments purchased with an original maturity of three months or less to be cash equivalents.

Restricted Cash

Restricted CashRestricted cash includes $250 and $3,000 at September 30, 2021 and December 31, 2020, respectively, segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $101 at September 30, 2021 and December 31, 2020 segregated in special reserve accounts for the benefit of customers of the Company’s broker-dealer subsidiary, SEI Investments Distribution Co. (SIDCO), in accordance with certain rules established by the Securities and Exchange Commission (SEC) for broker-dealers.

Reclassifications

Reclassifications

Certain prior year amounts have been reclassified to conform to current year presentation.

Equity Method Investments

The Company accounts for its interest in LSV using the equity method because of its less than 50% ownership. The Company’s interest in the net assets of LSV is reflected in Investment in unconsolidated affiliate on the accompanying Consolidated Balance Sheets and its interest in the earnings of LSV is reflected in Equity in earnings of unconsolidated affiliate on the accompanying Consolidated Statements of Operations.

Fair Value of Financial Instruments

The fair value of the Company’s financial assets and liabilities, except for the Company's investment funds sponsored by LSV, is determined in accordance with the fair value hierarchy. The fair value of the Company’s Level 1 financial assets consist mainly of investments in open-ended mutual funds that are quoted daily. Level 2 financial assets consist of GNMA mortgage-backed securities held by the Company's wholly-owned limited purpose federal thrift subsidiary, SEI Private Trust Company (SPTC), Federal Home Loan Bank (FHLB) and other U.S. government agency short-term notes held by SIDCO. The financial assets held by SIDCO were purchased as part of a cash management program requiring only short term, top-tier investment grade government and corporate securities. The financial assets held by SPTC are debt securities issued by GNMA and are backed by the full faith and credit of the U.S. government. These securities were purchased for the sole purpose of satisfying applicable regulatory requirements and have maturity dates which range from 2023 to 2041.

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived

from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

The valuation of the Company's Level 2 financial assets held by SIDCO and SPTC are based upon securities pricing policies and procedures utilized by third-party pricing vendors.

The pricing policies and procedures applied for our Level 1 and Level 2 financial assets during the nine months ended September 30, 2021 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2020. The Company had no Level 3 financial assets at September 30, 2021 or December 31, 2020 that were required to be measured at fair value on a recurring basis.

Investments in Affiliated Funds

The fair value of the Company's investment funds sponsored by LSV is measured using the net asset value per share (NAV) as a practical expedient. The NAVs of the funds are calculated by the funds' independent custodian and are derived from the fair values of the underlying investments as of the reporting date. The funds allow for investor redemptions at the end of each calendar month. This investment has not been classified in the fair value hierarchy but is presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

Available-for-sale Securities

These net unrealized gains are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

Securities Owned

The Company’s broker-dealer subsidiary, SIDCO, has investments in U.S. government agency securities with maturity dates less than one year. These investments are reflected as Securities owned on the accompanying Consolidated Balance Sheets. Due to specialized accounting practices applicable to investments by broker-dealers, the securities are reported at fair value and changes in fair value are recorded in current period earnings.

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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2021

Accounting Policies [Abstract]

Calculation Of Basic And Diluted Earnings Per Share

The calculations of basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 are:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Net income	$	138,045	$	111,096	$	401,293	$	321,404
Shares used to compute basic earnings per common share	140,507,000		145,812,000		141,928,000		147,586,000
Dilutive effect of stock options	1,919,000		2,095,000		2,053,000		2,372,000
Shares used to compute diluted earnings per common share	142,426,000		147,907,000		143,981,000		149,958,000
Basic earnings per common share	$	0.98	$	0.76	$	2.83	$	2.18
Diluted earnings per common share	$	0.97	$	0.75	$	2.79	$	2.14

Adjustments To Reconcile Net Income To Net Cash Provided By Operating Activities

The following table provides the details of the adjustments to reconcile net income to net cash provided by operating activities for the nine months ended September 30:

	2021		2020
Net income	$	401,293	$	321,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	25,141		23,058
Amortization	43,749		39,417
Equity in earnings of unconsolidated affiliate	(103,420)		(86,488)
Distributions received from unconsolidated affiliate	110,559		107,180
Stock-based compensation	31,173		20,458
Provision for losses on receivables	1,569		109
Deferred income tax expense	(6,639)		(7,731)
Net (gain) loss from investments	(134)		1,310
Change in other long-term liabilities	2,103		(4,442)
Change in other assets	314		(965)
Contract costs capitalized, net of amortization	(482)		(2,842)
Other	921		(1,053)
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products	(4,537)		2,521
Receivables	(58,537)		(37,921)
Other current assets	(3,919)		(6,186)
Advances due from unconsolidated affiliate	51,422		12,641
(Decrease) increase in
Accounts payable	3,006		8,615
Accrued liabilities	(9,851)		8,809
Deferred revenue	150		(1,370)
Total adjustments	82,588		75,120
Net cash provided by operating activities	$	483,881	$	396,524

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Investment In Unconsolidated Affiliate (Tables)

9 Months Ended

Sep. 30, 2021

Equity Method Investments and Joint Ventures [Abstract]

Condensed Financial Information of LSV

These tables contain condensed financial information of LSV:

Condensed Statement of Operations	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Revenues	$	115,728	$	94,902	$	342,957	$	289,546
Net income	90,365		70,440		266,805		220,184

Condensed Balance Sheets	September 30, 2021		December 31, 2020
Current assets	$	123,325	$	151,515
Non-current assets	4,426		4,296
Total assets	$	127,751	$	155,811
Current liabilities	$	69,349	$	77,077
Non-current liabilities	4,058		4,620
Partners’ capital	54,344		74,114
Total liabilities and partners’ capital	$	127,751	$	155,811

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Composition of Certain Financial Statement Captions (Tables)

9 Months Ended

Sep. 30, 2021

Items Included in Consolidated Statement of Financial Condition [Abstract]

Schedule of Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	September 30, 2021		December 31, 2020
Trade receivables	$	112,572	$	99,106
Fees earned, not billed	313,883		262,167
Other receivables	18,401		25,046
	444,856		386,319
Less: Allowance for doubtful accounts	(2,669)		(1,100)
	$	442,187	$	385,219

Schedule of Property And Equipment

Property and Equipment on the accompanying Consolidated Balance Sheets consists of:

	September 30, 2021		December 31, 2020
Buildings	$	209,315	$	206,151
Equipment	150,945		141,820
Land	24,651		24,179
Purchased software	156,327		147,838
Furniture and fixtures	21,196		21,439
Leasehold improvements	21,838		21,604
Construction in progress	209		4,660
	584,481		567,691
Less: Accumulated depreciation	(400,679)		(378,639)
Property and Equipment, net	$	183,802	$	189,052

Schedule of Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	September 30, 2021		December 31, 2020
Accrued employee compensation	$	86,924	$	95,656
Accrued employee benefits and other personnel	11,743		18,770
Accrued consulting, outsourcing and professional fees	35,945		31,907
Accrued sub-advisory, distribution and other asset management fees	57,560		49,924
Accrued dividend payable	—		53,127
Other accrued liabilities	38,871		50,461
Total accrued liabilities	$	231,043	$	299,845

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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Fair Value Of Certain Financial Assets And Liabilities

The fair value of certain financial assets of the Company was determined using the following inputs:

			Fair Value Measurements at the End of the Reporting Period Using
Assets	September 30, 2021		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	12,241	$	12,241	$	—
Available-for-sale debt securities	127,838		—		127,838
Fixed-income securities owned	31,770		—		31,770
Investment funds sponsored by LSV (1)	6,893
	$	178,742	$	12,241	$	159,608

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2020		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	12,142	$	12,142	$	—
Available-for-sale debt securities	93,277		—		93,277
Fixed-income securities owned	34,064		—		34,064
Investment funds sponsored by LSV (1)	6,166
	$	145,649	$	12,142	$	127,341

(1) The fair value amounts presented in the tables above are intended to permit reconciliation of the fair value hierarchy to the amounts presented on the accompanying Consolidated Balance Sheets (See Note 5).

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Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2021

Marketable Securities [Abstract]

Schedule of Investments Available For Sale

Available For Sale and Equity Securities on the accompanying Consolidated Balance Sheets consist of: 

	At September 30, 2021
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	126,964	$	874	$	—	$	127,838
SEI-sponsored mutual funds	6,692		380		—		7,072
Equities and other mutual funds	4,932		237		—		5,169
	$	138,588	$	1,491	$	—	$	140,079

	At December 31, 2020
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	91,262	$	2,015	$	—	$	93,277
SEI-sponsored mutual funds	6,866		382		—		7,248
Equities and other mutual funds	4,421		473		—		4,894
	$	102,549	$	2,870	$	—	$	105,419

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Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2021

Stockholders' Equity Note [Abstract]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three and nine months ended September 30, 2021 and 2020, respectively, as follows: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Stock-based compensation expense	$	11,318	$	6,467	$	31,173	$	20,458
Less: Deferred tax benefit	(1,857)		(1,229)		(5,615)		(3,932)
Stock-based compensation expense, net of tax	$	9,461	$	5,238	$	25,558	$	16,526

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Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2021

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule Of Accumulated Other Comprehensive Income (Loss), Net Of Tax

The components of Accumulated other comprehensive loss, net of tax, are as follows: 

	Foreign Currency Translation Adjustments		Unrealized Gains (Losses) on Investments		Accumulated Other Comprehensive Loss
Balance, January 1, 2021	$	(18,349)	$	1,551	$	(16,798)
Other comprehensive loss before reclassifications	(2,867)		(1,548)		(4,415)
Amounts reclassified from accumulated other comprehensive loss	—		670		670
Net current-period other comprehensive loss	(2,867)		(878)		(3,745)
Balance, September 30, 2021	$	(21,216)	$	673	$	(20,543)

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Business Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

Segment Reporting [Abstract]

Schedule Of Financial Information About Business Segments

The following tables highlight certain financial information about each of the business segments for the three months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2021
Revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322
Expenses	116,679		62,107		41,643		89,594		12,820		322,843
Operating profit (loss)	$	6,339	$	62,661	$	44,116	$	57,818	$	(8,455)	$	162,479

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2020
Revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927
Expenses	113,066		51,519		37,812		79,838		13,315		295,550
Operating profit (loss)	$	1,726	$	51,670	$	41,771	$	44,008	$	(9,798)	$	129,377

The following tables highlight certain financial information about each of business segment for the nine months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2021
Revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659
Expenses	345,057		176,267		122,696		257,609		39,855		941,484
Operating profit (loss)	$	19,245	$	181,191	$	133,261	$	169,030	$	(27,552)	$	475,175

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2020
Revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335
Expenses	331,442		154,100		113,016		228,795		37,691		865,044
Operating profit (loss)	$	4,297	$	145,118	$	122,293	$	131,020	$	(27,437)	$	375,291

Reconciliation Of Total Operating Profit Reported For Business Segments To Income From Operations In Consolidated Statements Of Operations

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the three months ended September 30, 2021 and 2020 is as follows:

	2021		2020
Total operating profit from segments	$	162,479	$	129,377
Corporate overhead expenses	(21,354)		(18,040)
Income from operations	$	141,125	$	111,337

A reconciliation of the total operating profit reported for the business segments to income from operations in the Consolidated Statements of Operations for the nine months ended September 30, 2021 and 2020:

	2021		2020
Total operating profit from segments	$	475,175	$	375,291
Corporate overhead expenses	(65,192)		(53,414)
Income from operations	$	409,983	$	321,877

Reconciliation of Other Significant Reconciling Items from Segments to Consolidated

The following tables provide additional information for the three months ended September 30, 2021 and 2020 pertaining to the business segments:

	Capital Expenditures (1)				Depreciation
	2021		2020		2021		2020
Private Banks	$	6,173	$	7,652	$	4,980	$	4,222
Investment Advisors	2,896		3,234		499		1,255
Institutional Investors	720		698		271		298
Investment Managers	3,722		2,776		2,428		1,818
Investments in New Businesses	336		144		60		97
Total from business segments	$	13,847	$	14,504	$	8,238	$	7,690
Corporate overhead	419		274		170		255
	$	14,266	$	14,778	$	8,408	$	7,945

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2021		2020
Private Banks	$	8,526	$	7,505
Investment Advisors	3,014		2,683
Institutional Investors	427		426
Investment Managers	2,451		2,343
Investments in New Businesses	185		186
Total from business segments	$	14,603	$	13,143
Corporate overhead	71		57
	$	14,674	$	13,200

The following tables provide additional information for the nine months ended September 30, 2021 and 2020:

	Capital Expenditures (1)				Depreciation
	2021		2020		2021		2020
Private Banks	$	20,596	$	24,211	$	13,290	$	12,069
Investment Advisors	8,784		12,427		3,205		3,578
Institutional Investors	2,115		3,085		982		901
Investment Managers	8,726		19,067		6,508		5,499
Investments in New Businesses	788		894		306		243
Total from business segments	$	41,009	$	59,684	$	24,291	$	22,290
Corporate Overhead	997		2,069		850		768
	$	42,006	$	61,753	$	25,141	$	23,058

(1) Capital expenditures include additions to property and equipment and capitalized software.

	Amortization
	2021		2020
Private Banks	$	25,735	$	22,390
Investment Advisors	8,550		7,999
Institutional Investors	1,280		1,280
Investment Managers	7,375		7,020
Investments in New Businesses	555		556
Total from business segments	$	43,495	$	39,245
Corporate Overhead	254		172
	$	43,749	$	39,417

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Income Taxes (Tables)

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

Schedule Of Interest And Penalties

	September 30, 2021		December 31, 2020
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	16,721	$	15,911
Interest and penalties on unrecognized benefits	1,835		2,105
Total gross uncertain tax positions	$	18,556	$	18,016
Amount included in Current liabilities	$	4,497	$	6,546
Amount included in Other long-term liabilities	14,059		11,470
	$	18,556	$	18,016

Schedule of Effective Income Tax Rate Reconciliation

The effective income tax rate for the three and nine months ended September 30, 2021 and 2020 differs from the federal income tax statutory rate due to the following:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Statutory rate	21.0	%	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.5		3.3		3.0		3.2
Foreign tax expense and tax rate differential	(0.1)		(0.2)		(0.1)		(0.1)
Tax benefit from stock option exercises	(0.6)		(0.4)		(1.0)		(1.0)
Expiration of the statute of limitations	—		(1.3)		—		(0.5)
State settlements	(0.3)		—		(0.2)		—
Provision-to-return adjustment	(0.5)		(0.4)		(0.2)		(0.1)
Other, net	(0.3)		(0.6)		(0.3)		(0.5)
	21.7	%	21.4	%	22.2	%	22.0	%

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Revenues from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the business segments for the three months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2021
Investment management fees from pooled investment products	$	34,212	$	77,123	$	13,639	$	32	$	338	$	125,344
Investment management fees from investment management agreements	605		41,688		71,964		—		3,864		118,121
Investment operations fees	363		—		—		136,978		—		137,341
Investment processing fees - PaaS	54,191		—		—		—		—		54,191
Investment processing fees - SaaS	28,579		—		—		3,848		—		32,427
Professional services fees	4,174		—		—		871		—		5,045
Account fees and other	894		5,957		156		5,683		163		12,853
Total revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322
Primary Geographic Markets:
United States	$	77,260	$	124,768	$	68,810	$	136,934	$	4,365	$	412,137
United Kingdom	28,767		—		13,327		—		—		42,094
Canada	12,343		—		926		—		—		13,269
Ireland	4,648		—		2,570		10,478		—		17,696
Other	—		—		126		—		—		126
Total revenues	$	123,018	$	124,768	$	85,759	$	147,412	$	4,365	$	485,322

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2020
Investment management fees from pooled investment products	$	32,256	$	68,287	$	13,417	$	180	$	356	$	114,496
Investment management fees from investment management agreements	421		29,761		65,811		—		3,041		99,034
Investment operations fees	446		—		—		113,037		—		113,483
Investment processing fees - PaaS	47,393		—		—		—		—		47,393
Investment processing fees - SaaS	27,567		—		—		3,479		—		31,046
Professional services fees	5,663		—		—		2,016		—		7,679
Account fees and other	1,046		5,141		355		5,134		120		11,796
Total revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927
Primary Geographic Markets:
United States	$	74,633	$	103,189	$	62,699	$	116,196	$	3,517	$	360,234
United Kingdom	25,234		—		12,930		—		—		38,164
Canada	10,596		—		1,298		—		—		11,894
Ireland	4,329		—		2,526		7,650		—		14,505
Other	—		—		130		—		—		130
Total revenues	$	114,792	$	103,189	$	79,583	$	123,846	$	3,517	$	424,927

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the nine months ended September 30, 2021 and 2020:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2021
Investment management fees from pooled investment products	$	100,484	$	224,816	$	41,365	$	105	$	993	$	367,763
Investment management fees from investment management agreements	1,681		114,747		213,249		—		10,811		340,488
Investment operations fees	1,134		—		—		394,401		—		395,535
Investment processing fees - PaaS	160,813		—		—		—		—		160,813
Investment processing fees - SaaS	84,831		—		—		11,409		—		96,240
Professional services fees	12,509		—		—		2,885		—		15,394
Account fees and other	2,850		17,895		1,343		17,839		499		40,426
Total revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659
Primary Geographic Markets:
United States	$	231,203	$	357,458	$	203,322	$	396,598	$	12,303	$	1,200,884
United Kingdom	83,514		—		41,091		—		—		124,605
Canada	35,977		—		3,426		—		—		39,403
Ireland	13,608		—		7,735		30,041		—		51,384
Other	—		—		383		—		—		383
Total revenues	$	364,302	$	357,458	$	255,957	$	426,639	$	12,303	$	1,416,659

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2020
Investment management fees from pooled investment products	$	95,407	$	200,718	$	39,628	$	536	$	1,063	$	337,352
Investment management fees from investment management agreements	1,060		83,726		194,445		—		8,912		288,143
Investment operations fees	1,359		—		—		328,316		—		329,675
Investment processing fees - PaaS	137,737		—		—		—		—		137,737
Investment processing fees - SaaS	84,783		—		—		10,122		—		94,905
Professional services fees	11,535		—		—		4,674		—		16,209
Account fees and other	3,858		14,774		1,236		16,167		279		36,314
Total revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335
Primary Geographic Markets:
United States	$	220,254	$	299,218	$	185,202	$	335,776	$	10,254	$	1,050,704
United Kingdom	71,938		—		38,034		—		—		109,972
Canada	30,723		—		4,327		—		—		35,050
Ireland	12,824		—		7,321		24,039		—		44,184
Other	—		—		425		—		—		425
Total revenues	$	335,739	$	299,218	$	235,309	$	359,815	$	10,254	$	1,240,335

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Summary of Significant Accounting Policies [Line Items]
Cash and cash equivalents invested in SEI-sponsored money market funds	$ 793,883		$ 793,883		$ 784,626
Restricted cash	351		351		3,101
Capitalized software development costs			19,486	$ 18,640
Net book value of capitalized software	$ 250,280		$ 250,280		270,977
Anti-dilutive employee stock options (in shares)	11,347	8,813	11,531	8,342
Anti-dilutive employee stock options (in USD per share)	$ 57.80	$ 57.98	$ 57.78	$ 58.18
SEI Wealth Platform
Summary of Significant Accounting Policies [Line Items]
Capitalized software development costs			$ 19,387	$ 17,208
Net book value of capitalized software	$ 241,262		241,262
Capitalized software in progress	22,702		22,702		13,409
Amortization expense of capitalized software			$ 35,834	32,576
SEI Wealth Platform | Weighted Average
Summary of Significant Accounting Policies [Line Items]
Weighted average remaining life (in years)			10 years
SEI-Sponsored Open-Ended Money Market Mutual Funds
Summary of Significant Accounting Policies [Line Items]
Cash and cash equivalents invested in SEI-sponsored money market funds	332,657		$ 332,657		347,082
SEI Investments (Europe) Limited
Summary of Significant Accounting Policies [Line Items]
Restricted cash	250		250		3,000
SEI Investments Distribution Co. (SIDCO)
Summary of Significant Accounting Policies [Line Items]
Restricted cash	101		101		$ 101
SEI-Sponsored Open-Ended Money Market Mutual Funds
Summary of Significant Accounting Policies [Line Items]
Fees waived	$ 11,629	$ 8,575	$ 33,118	$ 24,930

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Summary of Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Net income	$ 138,045	$ 111,096	$ 401,293	$ 321,404
Shares used to compute basic earnings per common share (in shares)	140,507	145,812	141,928	147,586
Dilutive effect of stock options (in shares)	1,919	2,095	2,053	2,372
Shares used to compute diluted earnings per common share (in shares)	142,426	147,907	143,981	149,958
Basic earnings per common share (in USD per share)	$ 0.98	$ 0.76	$ 2.83	$ 2.18
Diluted earnings per common share (in USD per share)	$ 0.97	$ 0.75	$ 2.79	$ 2.14

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Summary of Significant Accounting Policies (Net Cash Provided by Operating Activities) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accounting Policies [Abstract]
Net income	$ 138,045	$ 111,096	$ 401,293	$ 321,404
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,408	7,945	25,141	23,058
Amortization	14,674	13,200	43,749	39,417
Equity in earnings of unconsolidated affiliate	(35,005)	(28,305)	(103,420)	(86,488)
Distributions received from unconsolidated affiliate			110,559	107,180
Stock-based compensation	11,318	6,467	31,173	20,458
Provision for losses on receivables			1,569	109
Deferred income tax expense			(6,639)	(7,731)
Net (gain) loss from investments	$ 575	$ (776)	(134)	1,310
Change in other long-term liabilities			2,103	(4,442)
Change in other assets			314	(965)
Contract costs capitalized, net of amortization			(482)	(2,842)
Other			921	(1,053)
Change in current assets and liabilities (Increase) decrease in
Receivables from investment products			(4,537)	2,521
Receivables			(58,537)	(37,921)
Other current assets			(3,919)	(6,186)
Advances due from unconsolidated affiliate			51,422	12,641
(Decrease) increase in
Accounts payable			3,006	8,615
Accrued liabilities			(9,851)	8,809
Deferred revenue			150	(1,370)
Total adjustments			82,588	75,120
Net cash provided by operating activities			$ 483,881	$ 396,524

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Investment In Unconsolidated Affiliate (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Apr. 01, 2021	Mar. 31, 2021
Investments in and Advances to Affiliates [Line Items]
Distributions received from unconsolidated affiliate			$ 110,559	$ 107,180
Company's share in the earnings of equity method investee	$ 35,005	$ 28,305	103,420	86,488
LSV Asset Management
Investments in and Advances to Affiliates [Line Items]
Equity method investment, ownership percentage					38.70%	38.80%
Total investment in equity method investee	39,872		39,872
Distributions received from unconsolidated affiliate			110,559	107,180
Company's share in the earnings of equity method investee	$ 35,005	$ 28,305	$ 103,420	$ 86,488

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Investment In Unconsolidated Affiliate (Statement of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule of Equity Method Investments [Line Items]
Revenues	$ 485,322	$ 424,927	$ 1,416,659	$ 1,240,335
Equity Method Investment, Nonconsolidated Investee | LSV Asset Management
Schedule of Equity Method Investments [Line Items]
Revenues	115,728	94,902	342,957	289,546
Net income	$ 90,365	$ 70,440	$ 266,805	$ 220,184

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Investment in Unconsolidated Affiliate (Balance Sheets) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
Current assets	$ 1,370,614	$ 1,300,977
Total Assets	2,191,801	2,167,256
Current liabilities	253,462	317,275
Total Liabilities and Shareholders' Equity	2,191,801	2,167,256
Equity Method Investment, Nonconsolidated Investee | LSV Asset Management
Schedule of Equity Method Investments [Line Items]
Current assets	123,325	151,515
Non-current assets	4,426	4,296
Total Assets	127,751	155,811
Current liabilities	69,349	77,077
Non-current liabilities	4,058	4,620
Partners’ capital	54,344	74,114
Total Liabilities and Shareholders' Equity	$ 127,751	$ 155,811

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Composition of Certain Financial Statement Captions (Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Items Included in Consolidated Statement of Financial Condition [Abstract]
Trade receivables	$ 112,572	$ 99,106
Fees earned, not billed	313,883	262,167
Other receivables	18,401	25,046
Receivables, Gross, Current	444,856	386,319
Less: Allowance for doubtful accounts	(2,669)	(1,100)
Receivables, net	$ 442,187	$ 385,219

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Composition of Certain Financial Statement Captions (Property And Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property and Equipment [Line Items]
Property and equipment, gross	$ 584,481		$ 584,481		$ 567,691
Less: Accumulated depreciation	(400,679)		(400,679)		(378,639)
Property and Equipment, net	183,802		183,802		189,052
Depreciation expense	8,408	$ 7,945	25,141	$ 23,058
Buildings
Property and Equipment [Line Items]
Property and equipment, gross	209,315		209,315		206,151
Equipment
Property and Equipment [Line Items]
Property and equipment, gross	150,945		150,945		141,820
Land
Property and Equipment [Line Items]
Property and equipment, gross	24,651		24,651		24,179
Purchased software
Property and Equipment [Line Items]
Property and equipment, gross	156,327		156,327		147,838
Furniture and fixtures
Property and Equipment [Line Items]
Property and equipment, gross	21,196		21,196		21,439
Leasehold improvements
Property and Equipment [Line Items]
Property and equipment, gross	21,838		21,838		21,604
Construction in progress
Property and Equipment [Line Items]
Property and equipment, gross	$ 209		$ 209		$ 4,660

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Composition of Certain Financial Statement Captions (Deferred Contract Costs) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Items Included in Consolidated Statement of Financial Condition [Abstract]
Deferred contract costs	$ 34,263,000		$ 34,263,000		$ 33,781,000
Capitalized contract cost, amount capitalized during period	$ 2,932,000	$ 2,521,000	6,978,000	$ 7,270,000
Amortization of deferred contract costs			6,496,000	$ 4,428,000
Capitalized contract cost impairment			$ 0

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Composition of Certain Financial Statement Captions (Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Items Included in Consolidated Statement of Financial Condition [Abstract]
Accrued employee compensation	$ 86,924	$ 95,656
Accrued employee benefits and other personnel	11,743	18,770
Accrued consulting, outsourcing and professional fees	35,945	31,907
Accrued sub-advisory, distribution and other asset management fees	57,560	49,924
Accrued dividend payable	0	53,127
Other accrued liabilities	38,871	50,461
Total accrued liabilities	$ 231,043	$ 299,845

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Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-income securities owned	$ 31,770	$ 34,064
Assets, fair value	178,742	145,649
Quoted Prices in Active  Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-income securities owned	0	0
Assets, fair value	12,241	12,142
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-income securities owned	31,770	34,064
Assets, fair value	159,608	127,341
Fair Value Measured at Net Asset Value Per Share
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment funds sponsored by LSV	6,893	6,166
Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	12,241	12,142
Equity securities | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	12,241	12,142
Equity securities | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	0	0
Available-for-sale debt securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	127,838	93,277
Available-for-sale debt securities | Quoted Prices in Active  Markets for Identical Assets (Level 1)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	0	0
Available-for-sale debt securities | Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	$ 127,838	$ 93,277

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Marketable Securities (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Schedule of Investments [Line Items]
Net unrealized gains (losses) of available-for-sale debt securities	$ 673,000		$ 673,000		$ 1,551,000
Unrealized gains (losses) during the period, income tax expense (benefit)	201,000		201,000		464,000
Available-for-sale securities, gross realized gains			0	$ 0
Mutual funds and equities, gross realized gains			714,000	254,000
Mutual funds and equities, gross realized loss			65,000	250,000
Other long-term investments	39,872,000		39,872,000		98,433,000
Securities owned	31,770,000		31,770,000		34,064,000
Cash Equivalents
Schedule of Investments [Line Items]
Cash equivalents at fair value	453,628,000		453,628,000		462,624,000
Available-for-sale debt securities
Schedule of Investments [Line Items]
Available-for-sale securities, gross realized losses			861,000	582,000
Investment Funds Sponsored by LSV
Schedule of Investments [Line Items]
Other long-term investments	6,893,000		6,893,000		$ 6,166,000
Unrealized gain (loss) on investments	$ (39,000)	$ 458,000	$ 727,000	$ (781,000)

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Marketable Securities (Investments Available For Sale) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Available For Sale and Equity Securities, Cost	$ 138,588	$ 102,549
Available For Sale and Equity Securities, Gross Unrealized Gains	1,491	2,870
Available For Sale and Equity Securities, Gross Unrealized (Losses)	0	0
Available For Sale and Equity Securities, Fair Value	140,079	105,419
Available-for-sale debt securities
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, Cost	126,964	91,262
Available for sale debt securities, Gross Unrealized Gains	874	2,015
Available for sale debt securities, Gross Unrealized (Losses)	0	0
Available for sale debt securities, Fair Value	127,838	93,277
SEI-sponsored mutual funds
Debt Securities, Available-for-sale [Line Items]
Equity securities, FV-NI, Cost	6,692	6,866
Equity securities, FV-NI, Gross Unrealized Gains	380	382
Equity securities, FV-NI, Gross Unrealized (Losses)	0	0
Equity securities, FV-NI, Fair Value	7,072	7,248
Equities and other mutual funds
Debt Securities, Available-for-sale [Line Items]
Equity securities, FV-NI, Cost	4,932	4,421
Equity securities, FV-NI, Gross Unrealized Gains	237	473
Equity securities, FV-NI, Gross Unrealized (Losses)	0	0
Equity securities, FV-NI, Fair Value	$ 5,169	$ 4,894

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Line of Credit (Details) - 2021 Credit Facility	Apr. 23, 2021 USD ($) fiscalQuarter	Sep. 30, 2021 USD ($)
Line of Credit Facility [Line Items]
Debt interest rate accrual term, number of preceding fiscal quarters | fiscalQuarter	4
Letters of credit outstanding amount		$ 5,808,000
Line of Credit
Line of Credit Facility [Line Items]
Credit facility term of agreement	5 years
Credit facility maximum borrowing capacity	$ 325,000,000
Credit facility stated percentage	0.00%
Credit facility accordion feature, increase limit	$ 100,000,000
Credit facility remaining borrowing capacity		$ 319,192,000
Line of Credit | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread	1.00%
Line of Credit | Federal Funds Rate
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread	0.50%
Line of Credit | Minimum
Line of Credit Facility [Line Items]
Credit facility commitment fee per annum on daily unused portion	0.15%
Line of Credit | Minimum | Lender's Base Rate Plus Market Spread
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread	0.25%
Line of Credit | Minimum | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread	1.25%
Line of Credit | Maximum
Line of Credit Facility [Line Items]
Credit facility commitment fee per annum on daily unused portion	0.30%
Line of Credit | Maximum | Lender's Base Rate Plus Market Spread
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread	1.00%
Line of Credit | Maximum | London Interbank Offered Rate (LIBOR)
Line of Credit Facility [Line Items]
Credit facility variable interest rate basis spread	2.00%
Letter of Credit
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity	$ 15,000,000
Credit facility, commitment fee percentage	1.25%
Credit facility, fronting fee percentage	0.20%

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Shareholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
	Jun. 02, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase (decrease) in stock-based compensation from change in management's estimate				$ 3,209	$ 0
Unrecognized compensation cost		$ 72,399		72,399
Total intrinsic value of options exercised				30,496
Aggregate intrinsic value of options exercisable		$ 104,146		$ 104,146
Market value of Company's common stock (in USD per share)		$ 59.30		$ 59.30
Weighted average exercise price per share (in USD per share)		$ 40.63		$ 40.63
Total options outstanding (in shares)		16,925		16,925
Total options exercisable (in shares)		5,578		5,578
Dividends declared per common share (in USD per share)	$ 0.37	$ 0	$ 0	$ 0.37	$ 0.35
Cash dividends declared				$ 52,389	$ 51,462
Common Stock Buyback
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased and retired (in shares)				5,218
Company purchased, cost				$ 316,053
Remaining stock repurchase authorization amount		$ 126,775		$ 126,775
2014 Plan | Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate				50.00%
2014 Plan | Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting rate				50.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award waiting period				2 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award waiting period				4 years

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Shareholders' Equity (Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stockholders' Equity Note [Abstract]
Stock-based compensation expense	$ 11,318	$ 6,467	$ 31,173	$ 20,458
Less: Deferred tax benefit	(1,857)	(1,229)	(5,615)	(3,932)
Stock-based compensation expense, net of tax	$ 9,461	$ 5,238	$ 25,558	$ 16,526

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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,805,606	$ 1,708,625	$ 1,739,907	$ 1,738,778
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications			(4,415)
Amounts reclassified from accumulated other comprehensive loss			670
Total other comprehensive (loss) income, net of tax	(6,021)	6,781	(3,745)	(3,894)
Ending balance	1,838,088	1,729,433	1,838,088	1,729,433
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			(18,349)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications			(2,867)
Amounts reclassified from accumulated other comprehensive loss			0
Total other comprehensive (loss) income, net of tax			(2,867)
Ending balance	(21,216)		(21,216)
Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance			1,551
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications			(1,548)
Amounts reclassified from accumulated other comprehensive loss			670
Total other comprehensive (loss) income, net of tax			(878)
Ending balance	673		673
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(14,522)	(34,179)	(16,798)	(23,504)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Total other comprehensive (loss) income, net of tax	(6,021)	6,781	(3,745)	(3,894)
Ending balance	$ (20,543)	$ (27,398)	$ (20,543)	$ (27,398)

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Business Segment Information (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 485,322,000	$ 424,927,000	$ 1,416,659,000	$ 1,240,335,000
Intersegment
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0

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Business Segment Information (Schedule of Financial Information About Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenues	$ 485,322	$ 424,927	$ 1,416,659	$ 1,240,335
Expenses	322,843	295,550	941,484	865,044
Operating profit (loss)	162,479	129,377	475,175	375,291
Private Banks
Segment Reporting Information [Line Items]
Revenues	123,018	114,792	364,302	335,739
Expenses	116,679	113,066	345,057	331,442
Operating profit (loss)	6,339	1,726	19,245	4,297
Investment Advisors
Segment Reporting Information [Line Items]
Revenues	124,768	103,189	357,458	299,218
Expenses	62,107	51,519	176,267	154,100
Operating profit (loss)	62,661	51,670	181,191	145,118
Institutional Investors
Segment Reporting Information [Line Items]
Revenues	85,759	79,583	255,957	235,309
Expenses	41,643	37,812	122,696	113,016
Operating profit (loss)	44,116	41,771	133,261	122,293
Investment Managers
Segment Reporting Information [Line Items]
Revenues	147,412	123,846	426,639	359,815
Expenses	89,594	79,838	257,609	228,795
Operating profit (loss)	57,818	44,008	169,030	131,020
Investments In New Businesses
Segment Reporting Information [Line Items]
Revenues	4,365	3,517	12,303	10,254
Expenses	12,820	13,315	39,855	37,691
Operating profit (loss)	$ (8,455)	$ (9,798)	$ (27,552)	$ (27,437)

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Business Segment Information (Reconciliation of Total Operating Profit) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Total operating profit from segments	$ 162,479	$ 129,377	$ 475,175	$ 375,291
Income from operations	141,125	111,337	409,983	321,877
Operating Segments
Segment Reporting Information [Line Items]
Total operating profit from segments	162,479	129,377	475,175	375,291
Corporate
Segment Reporting Information [Line Items]
Corporate overhead expenses	$ (21,354)	$ (18,040)	$ (65,192)	$ (53,414)

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Business Segment Information (Schedule Of Additional Information Pertaining To Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Capital Expenditures	$ 14,266	$ 14,778	$ 42,006	$ 61,753
Depreciation	8,408	7,945	25,141	23,058
Amortization	14,674	13,200	43,749	39,417
Operating Segments
Segment Reporting Information [Line Items]
Capital Expenditures	13,847	14,504	41,009	59,684
Depreciation	8,238	7,690	24,291	22,290
Amortization	14,603	13,143	43,495	39,245
Operating Segments | Private Banks
Segment Reporting Information [Line Items]
Capital Expenditures	6,173	7,652	20,596	24,211
Depreciation	4,980	4,222	13,290	12,069
Amortization	8,526	7,505	25,735	22,390
Operating Segments | Investment Advisors
Segment Reporting Information [Line Items]
Capital Expenditures	2,896	3,234	8,784	12,427
Depreciation	499	1,255	3,205	3,578
Amortization	3,014	2,683	8,550	7,999
Operating Segments | Institutional Investors
Segment Reporting Information [Line Items]
Capital Expenditures	720	698	2,115	3,085
Depreciation	271	298	982	901
Amortization	427	426	1,280	1,280
Operating Segments | Investment Managers
Segment Reporting Information [Line Items]
Capital Expenditures	3,722	2,776	8,726	19,067
Depreciation	2,428	1,818	6,508	5,499
Amortization	2,451	2,343	7,375	7,020
Operating Segments | Investments In New Businesses
Segment Reporting Information [Line Items]
Capital Expenditures	336	144	788	894
Depreciation	60	97	306	243
Amortization	185	186	555	556
Corporate
Segment Reporting Information [Line Items]
Capital Expenditures	419	274	997	2,069
Depreciation	170	255	850	768
Amortization	$ 71	$ 57	$ 254	$ 172

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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 16,721	$ 15,911
Unrecognized tax benefits that would affect effective tax rate	16,532	15,761
Interest and penalties on unrecognized benefits	1,835	$ 2,105
Settlement and Lapse of Statute
Income Tax Contingency [Line Items]
Unrecognized tax benefits within the next twelve months	$ 4,497

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Income Taxes (Interest And Penalties) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 16,721	$ 15,911
Interest and penalties on unrecognized benefits	1,835	2,105
Total gross uncertain tax positions	18,556	18,016
Amount included in Current liabilities	4,497	6,546
Amount included in Other long-term liabilities	14,059	11,470
Total gross uncertain tax positions	$ 18,556	$ 18,016

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Income Taxes (Effective Income Tax Rate Reconciliation) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%	21.00%	21.00%
State taxes, net of federal tax benefit	2.50%	3.30%	3.00%	3.20%
Foreign tax expense and tax rate differential	(0.10%)	(0.20%)	(0.10%)	(0.10%)
Tax benefit from stock option exercises	(0.60%)	(0.40%)	(1.00%)	(1.00%)
Expiration of the statute of limitations	0.00%	(1.30%)	0.00%	(0.50%)
State settlements	(0.30%)	0.00%	(0.20%)	0.00%
Provision-to-return adjustment	(0.50%)	(0.40%)	(0.20%)	(0.10%)
Other, net	(0.30%)	(0.60%)	(0.30%)	(0.50%)
Effective income tax rate	21.70%	21.40%	22.20%	22.00%

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Commitments and Contingencies (Details)	Sep. 30, 2021 lawsuit
Loss Contingencies [Line Items]
Number of lawsuits filed	7
Cases with SPTC as Defendant
Loss Contingencies [Line Items]
Number of lawsuits filed	4
Claims for Violations of Louisiana Racketeering Act
Loss Contingencies [Line Items]
Number of lawsuits filed	2
Cases Remaining in Parish of East Baton Rouge Granted Indefinite Extensions to Respond
Loss Contingencies [Line Items]
Number of lawsuits filed	2
Cases Filed in East Baton Rouge
Loss Contingencies [Line Items]
Number of lawsuits filed	2

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Goodwill and Intangible Assets (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Apr. 30, 2018	Jul. 31, 2017
Goodwill [Line Items]
Goodwill	$ 64,489,000		$ 64,489,000
Payment of contingent consideration	3,965,000	$ 633,000
Goodwill change during period	0
Amortization expense	2,763,000	2,763,000
Huntington Steele, LLC
Goodwill [Line Items]
Goodwill				$ 11,499,000
Payment of contingent consideration	3,965,000	$ 633,000
Contingent consideration, current	765,000
Contingent consideration, long-term	$ 8,099,000
Archway
Goodwill [Line Items]
Goodwill					$ 52,990,000

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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 485,322	$ 424,927	$ 1,416,659	$ 1,240,335
United States
Disaggregation of Revenue [Line Items]
Revenues	412,137	360,234	1,200,884	1,050,704
United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	42,094	38,164	124,605	109,972
Canada
Disaggregation of Revenue [Line Items]
Revenues	13,269	11,894	39,403	35,050
Ireland
Disaggregation of Revenue [Line Items]
Revenues	17,696	14,505	51,384	44,184
Other
Disaggregation of Revenue [Line Items]
Revenues	126	130	383	425
Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	125,344	114,496	367,763	337,352
Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	118,121	99,034	340,488	288,143
Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	137,341	113,483	395,535	329,675
Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	54,191	47,393	160,813	137,737
Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	32,427	31,046	96,240	94,905
Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	5,045	7,679	15,394	16,209
Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	12,853	11,796	40,426	36,314
Private Banks
Disaggregation of Revenue [Line Items]
Revenues	123,018	114,792	364,302	335,739
Private Banks | United States
Disaggregation of Revenue [Line Items]
Revenues	77,260	74,633	231,203	220,254
Private Banks | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	28,767	25,234	83,514	71,938
Private Banks | Canada
Disaggregation of Revenue [Line Items]
Revenues	12,343	10,596	35,977	30,723
Private Banks | Ireland
Disaggregation of Revenue [Line Items]
Revenues	4,648	4,329	13,608	12,824
Private Banks | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Private Banks | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	34,212	32,256	100,484	95,407
Private Banks | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	605	421	1,681	1,060
Private Banks | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	363	446	1,134	1,359
Private Banks | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	54,191	47,393	160,813	137,737
Private Banks | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	28,579	27,567	84,831	84,783
Private Banks | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	4,174	5,663	12,509	11,535
Private Banks | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	894	1,046	2,850	3,858
Investment Advisors
Disaggregation of Revenue [Line Items]
Revenues	124,768	103,189	357,458	299,218
Investment Advisors | United States
Disaggregation of Revenue [Line Items]
Revenues	124,768	103,189	357,458	299,218
Investment Advisors | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Ireland
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	77,123	68,287	224,816	200,718
Investment Advisors | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	41,688	29,761	114,747	83,726
Investment Advisors | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Advisors | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	5,957	5,141	17,895	14,774
Institutional Investors
Disaggregation of Revenue [Line Items]
Revenues	85,759	79,583	255,957	235,309
Institutional Investors | United States
Disaggregation of Revenue [Line Items]
Revenues	68,810	62,699	203,322	185,202
Institutional Investors | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	13,327	12,930	41,091	38,034
Institutional Investors | Canada
Disaggregation of Revenue [Line Items]
Revenues	926	1,298	3,426	4,327
Institutional Investors | Ireland
Disaggregation of Revenue [Line Items]
Revenues	2,570	2,526	7,735	7,321
Institutional Investors | Other
Disaggregation of Revenue [Line Items]
Revenues	126	130	383	425
Institutional Investors | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	13,639	13,417	41,365	39,628
Institutional Investors | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	71,964	65,811	213,249	194,445
Institutional Investors | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Institutional Investors | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Institutional Investors | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Institutional Investors | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Institutional Investors | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	156	355	1,343	1,236
Investment Managers
Disaggregation of Revenue [Line Items]
Revenues	147,412	123,846	426,639	359,815
Investment Managers | United States
Disaggregation of Revenue [Line Items]
Revenues	136,934	116,196	396,598	335,776
Investment Managers | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Managers | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Managers | Ireland
Disaggregation of Revenue [Line Items]
Revenues	10,478	7,650	30,041	24,039
Investment Managers | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Managers | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	32	180	105	536
Investment Managers | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Managers | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	136,978	113,037	394,401	328,316
Investment Managers | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investment Managers | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	3,848	3,479	11,409	10,122
Investment Managers | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	871	2,016	2,885	4,674
Investment Managers | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	5,683	5,134	17,839	16,167
Investments In New Businesses
Disaggregation of Revenue [Line Items]
Revenues	4,365	3,517	12,303	10,254
Investments In New Businesses | United States
Disaggregation of Revenue [Line Items]
Revenues	4,365	3,517	12,303	10,254
Investments In New Businesses | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Ireland
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Other
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	338	356	993	1,063
Investments In New Businesses | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	3,864	3,041	10,811	8,912
Investments In New Businesses | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	0	0	0	0
Investments In New Businesses | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	$ 163	$ 120	$ 499	$ 279