10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 ________________________________________

FORM 10-Q

________________________________________

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

For the quarterly period ended March 31, 2024

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 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 April 11, 2024:

Common Stock, $0.01 par value 131,388,447 

SEI INVESTMENTS COMPANY

TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION
		Page
Item 1.	Financial Statements.	2
	Consolidated Balance Sheets (Unaudited) -- March 31, 2024 and December 31, 2023	2
	Consolidated Statements of Operations (Unaudited) -- For the Three Months Ended March 31, 2024 and 2023	4
	Consolidated Statements of Comprehensive Income (Unaudited) -- For the Three Months Ended March 31, 2024 and 2023	5
	Consolidated Statements of Changes in Equity (Unaudited) -- For the Three Months Ended March 31, 2024 and 2023	6
	Consolidated Condensed Statements of Cash Flows (Unaudited) -- For the Three Months Ended March 31, 2024 and 2023	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management's Discussion and Analysis of Financial Condition and Results of Operations.	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk.	40
Item 4.	Controls and Procedures.	40
PART II - OTHER INFORMATION
Item 1.	Legal Proceedings.	41
Item 1A.	Risk Factors.	41
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds.	41
Item 5.	Other Information	41
Item 6.	Exhibits.	41
	Signatures	42

1

PART I.        FINANCIAL INFORMATION

Item 1.    Consolidated Financial Statements.

SEI Investments Company

Consolidated Balance Sheets

(unaudited)

(Dollars in thousands, except par value)

	March 31, 2024		December 31, 2023
Assets
Current Assets:
Cash and cash equivalents	$	846,628	$	834,697
Restricted cash	301		301
Receivables from investment products	55,606		55,886
Receivables, net of allowance for doubtful accounts of $1,165 and $663	561,395		501,434
Securities owned	31,958		31,334
Other current assets	59,136		54,464
Total Current Assets	1,555,024		1,478,116
Property and Equipment, net of accumulated depreciation of $475,832 and $474,034	168,204		171,364
Operating Lease Right-of-Use Assets	20,687		22,477
Capitalized Software, net of accumulated amortization of $619,875 and $612,971	239,156		239,783
Available for Sale and Equity Securities	164,027		155,413
Investments in Affiliated Funds, at fair value	8,149		7,316
Investment in Unconsolidated Affiliate	57,291		110,781
Goodwill	137,204		137,333
Intangible Assets, net of accumulated amortization of $45,923 and $42,520	78,739		82,443
Deferred Contract Costs	40,000		40,221
Deferred Income Taxes	45,257		37,709
Other Assets, net	54,699		37,047
Total Assets	$	2,568,437	$	2,520,003

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

2

SEI Investments Company

Consolidated Balance Sheets

(unaudited)

(Dollars in thousands, except par value)

	March 31, 2024		December 31, 2023
Liabilities and Equity
Current Liabilities:
Accounts payable	$	10,290	$	10,618
Accrued liabilities	242,856		318,945
Current portion of long-term operating lease liabilities	7,562		8,118
Deferred revenue	15,274		15,366
Total Current Liabilities	275,982		353,047
Long-term Income Taxes Payable	803		803
Long-term Operating Lease Liabilities	15,599		17,235
Other Long-term Liabilities	16,999		17,090
Total Liabilities	309,383		388,175
Commitments and Contingencies
Shareholders' Equity:
Common stock, $0.01 par value, 750,000,000 shares authorized; 131,329,261 and 131,177,513 shares issued and outstanding	1,313		1,312
Capital in excess of par value	1,455,162		1,404,962
Retained earnings	843,870		762,586
Accumulated other comprehensive loss, net	(41,291)		(37,032)
Total Shareholders' Equity	2,259,054		2,131,828
Total Liabilities and Shareholders' Equity	$	2,568,437	$	2,520,003

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 March 31,
	2024		2023
Revenues:
Asset management, administration and distribution fees	$	404,366	$	371,829
Information processing and software servicing fees	107,213		97,290
Total revenues	511,579		469,119
Expenses:
Subadvisory, distribution and other asset management costs	46,768		47,379
Software royalties and other information processing costs	8,471		7,293
Compensation, benefits and other personnel	192,916		173,415
Stock-based compensation	11,059		8,074
Consulting, outsourcing and professional fees	51,976		61,104
Data processing and computer related	37,160		33,340
Facilities, supplies and other costs	18,603		18,792
Amortization	10,386		9,424
Depreciation	8,389		8,531
Total expenses	385,728		367,352
Income from operations	125,851		101,767
Net gain from investments	2,256		744
Interest and dividend income	10,819		8,778
Interest expense	(139)		(141)
Equity in earnings of unconsolidated affiliate	31,643		28,879
Income before income taxes	170,430		140,027
Income taxes	39,030		33,012
Net income	$	131,400	$	107,015
Basic earnings per common share	$	1.00	$	0.80
Shares used to compute basic earnings per share	131,417		134,020
Diluted earnings per common share	$	0.99	$	0.79
Shares used to compute diluted earnings per share	132,745		135,311

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 March 31,
	2024		2023
Net income	$	131,400	$	107,015
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(2,923)		3,067
Unrealized (loss) gain on investments:
Unrealized (losses) gains during the period, net of income taxes of $367 and $(385)	(1,231)		1,287
Reclassification adjustment for (gains) losses realized in net income, net of income taxes of $31 and $(11)	(105)		35
Total other comprehensive (loss) income, net of tax	(4,259)		4,389
Comprehensive income	$	127,141	$	111,404

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 March 31, 2024
Balance, January 1, 2024	131,178	$	1,312	$	1,404,962	$	762,586	$	(37,032)	$	2,131,828
Net income	—	—		—		131,400		—		131,400
Other comprehensive loss	—	—		—		—		(4,259)		(4,259)
Purchase and retirement of common stock	(808)	(8)		(5,877)		(50,116)		—		(56,001)
Issuance of common stock under employee stock purchase plan	22	—		1,196		—		—		1,196
Issuance of common stock under share-based award plans	937	9		43,822		—		—		43,831
Stock-based compensation	—	—		11,059		—		—		11,059
Balance, March 31, 2024	131,329	$	1,313	$	1,455,162	$	843,870	$	(41,291)	$	2,259,054

	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 March 31, 2023
Balance, January 1, 2023	134,162	$	1,342	$	1,307,162	$	694,287	$	(48,967)	$	1,953,824
Net income	—	—		—		107,015		—		107,015
Other comprehensive income	—	—		—		—		4,389		4,389
Purchase and retirement of common stock	(1,361)	(14)		(9,004)		(71,314)		—		(80,332)
Issuance of common stock under employee stock purchase plan	24	—		1,203		—		—		1,203
Issuance of common stock under share-based award plans	443	5		20,156		—		—		20,161
Stock-based compensation	—	—		8,074		—		—		8,074
Balance, March 31, 2023	133,268	$	1,333	$	1,327,591	$	729,988	$	(44,578)	$	2,014,334

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

6

SEI Investments Company

Consolidated Condensed Statements of Cash Flows

(unaudited)

(In thousands)

	Three Months Ended March 31,
	2024		2023
Cash flows from operating activities:
Net income	$	131,400	$	107,015
Adjustments to reconcile net income to net cash provided by operating activities (See Note 1)	(19,106)		7,349
Net cash provided by operating activities	112,294		114,364
Cash flows from investing activities:
Additions to property and equipment	(13,072)		(10,640)
Additions to capitalized software	(6,277)		(9,041)
Purchases of marketable securities	(41,650)		(21,777)
Prepayments and maturities of marketable securities	32,116		28,387
Proceeds from fixed asset dispositions	1,180		—
Other investing activities	(9,931)		(3,917)
Net cash used in investing activities	(37,634)		(16,988)
Cash flows from financing activities:
Payment of contingent consideration	—		(904)
Purchase and retirement of common stock	(46,825)		(81,214)
Proceeds from issuance of common stock	45,027		21,364
Payment of dividends	(60,359)		(57,835)
Net cash used in financing activities	(62,157)		(118,589)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(572)		2,561
Net increase (decrease) in cash, cash equivalents and restricted cash	11,931		(18,652)
Cash, cash equivalents and restricted cash, beginning of period	834,998		853,359
Cash, cash equivalents and restricted cash, end of period	$	846,929	$	834,707

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

7

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. 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 and Enhanced Chief Investment Officer (ECIO) 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 March 31, 2024, the results of operations for the three months ended March 31, 2024 and 2023, and cash flows for the three months ended March 31, 2024 and 2023. 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, 2023.

There have been no significant changes in significant accounting policies during the three months ended March 31, 2024 as compared to the significant accounting policies described in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.

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

8

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 $4,299 and $5,561 in fees during the three months ended March 31, 2024 and 2023, respectively.

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 $436,130 and $397,838 at March 31, 2024 and December 31, 2023, respectively, invested in SEI-sponsored open-ended money market mutual funds. See Note 5 for information related to the Company's total investments in SEI-sponsored and non-SEI-sponsored money market mutual funds and commercial paper classified as cash equivalents.

Restricted Cash

Restricted cash includes $250 at March 31, 2024 and December 31, 2023 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $51 at March 31, 2024 and December 31, 2023 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 $6,277 and $9,041 of software development costs during the three months ended March 31, 2024 and 2023, respectively, to further develop the SEI Wealth PlatformSM (SWP) and for the development of a new platform for the Investment Managers segment. The Company capitalized $3,795 and $4,734 of software development costs for significant enhancements to SWP during the three months ended March 31, 2024 and 2023, respectively. As of March 31, 2024, the net book value of SWP was $215,474. The net book value includes $3,795 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 $5,916 as of December 31, 2023. SWP has a weighted average remaining life of 8.8 years. Amortization expense for SWP was $6,757 and $6,158 during the three months ended March 31, 2024 and 2023, respectively.

The Company also capitalized $2,482 and $4,307 of software development costs during the three months ended March 31, 2024 and 2023, respectively, related to the development of a new platform for the Investment Managers segment. Capitalized software development costs in-progress associated with this platform were $22,650 and $20,083 as of March 31, 2024 and December 31, 2023, respectively. The platform is not yet ready for use.

Earnings per Share

The calculations of basic and diluted earnings per share for the three months ended March 31, 2024 and 2023 are:

	Three Months Ended March 31,
	2024		2023
Net income	$	131,400	$	107,015
Shares used to compute basic earnings per common share	131,417,000		134,020,000
Dilutive effect of stock options	1,328,000		1,291,000
Shares used to compute diluted earnings per common share	132,745,000		135,311,000
Basic earnings per common share	$	1.00	$	0.80
Diluted earnings per common share	$	0.99	$	0.79

During the three months ended March 31, 2024 and 2023, employee stock options to purchase 10,912,000 and 11,273,000 shares of common stock with an average exercise price of $61.05 and $61.28, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three month periods

9

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.

New Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (ASU 2023-07) which updates reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. The amendments are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments in ASU 2023-07 apply retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the impact of adopting ASU 2023-07 on its consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures (ASU 2023-09) to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 is effective for annual periods beginning after December 15, 2024 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2023-09 on its consolidated financial statements and related disclosures.

Reclassifications

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

10

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 three months ended March 31:

	2024		2023
Net income	$	131,400	$	107,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,389		8,531
Amortization	10,386		9,424
Equity in earnings of unconsolidated affiliate	(31,643)		(28,879)
Distributions received from unconsolidated affiliate	33,147		29,219
Stock-based compensation	11,059		8,074
Provision for losses on receivables	502		(180)
Deferred income tax expense	(7,150)		(5,452)
Net (gain) loss from investments	(2,256)		(744)
Change in other long-term liabilities	850		938
Change in other assets	(7,800)		(783)
Contract costs capitalized, net of amortization	221		423
Other	(2,068)		123
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products	280		6,270
Receivables	(60,386)		(962)
Other current assets	1,268		(2,261)
Advances due from unconsolidated affiliate	51,986		49,292
(Decrease) increase in
Accounts payable	(328)		877
Accrued liabilities	(25,471)		(65,998)
Deferred revenue	(92)		(563)
Total adjustments	(19,106)		7,349
Net cash provided by operating activities	$	112,294	$	114,364

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 March 31, 2024 was 38.6%. 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 March 31, 2024, the Company’s total investment in LSV was $57,291. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $33,147 and $29,219 in the three months ended March 31, 2024 and 2023, 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.

11

The Company’s proportionate share in the earnings of LSV was $31,643 and $28,879 during the three months ended March 31, 2024 and 2023, respectively.

These tables contain condensed financial information of LSV:

Condensed Statement of Operations	Three Months Ended March 31,
	2024		2023
Revenues	$	107,349	$	98,192
Net income	82,012		74,774

Condensed Balance Sheets	March 31, 2024		December 31, 2023
Current assets	$	127,930	$	169,867
Non-current assets	6,198		6,568
Total assets	$	134,128	$	176,435
Current liabilities	$	36,673	$	74,853
Non-current liabilities	1,955		2,182
Partners’ capital	95,500		99,400
Total liabilities and partners’ capital	$	134,128	$	176,435

Note 3.    Composition of Certain Financial Statement Captions

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2024		December 31, 2023
Trade receivables	$	136,599	$	115,356
Fees earned, not billed	408,852		372,291
Other receivables	17,109		14,450
	562,560		502,097
Less: Allowance for doubtful accounts	(1,165)		(663)
	$	561,395	$	501,434

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.

12

Property and Equipment

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

	March 31, 2024		December 31, 2023
Buildings	$	216,968	$	216,968
Equipment	190,071		193,096
Land	26,450		26,450
Purchased software	166,848		165,348
Furniture and fixtures	23,053		23,025
Leasehold improvements	19,857		19,827
Construction in progress	789		684
	644,036		645,398
Less: Accumulated depreciation	(475,832)		(474,034)
Property and Equipment, net	$	168,204	$	171,364

The Company recognized $8,389 and $8,531 in depreciation expense related to property and equipment for the three months ended March 31, 2024 and 2023, respectively.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $40,000 and $40,221 as of March 31, 2024 and December 31, 2023, respectively. The Company deferred expenses related to contract costs of $2,391 and $1,744 during the three months ended March 31, 2024 and 2023, respectively. Amortization expense related to deferred contract costs were $2,612 and $2,167 during the three months ended March 31, 2024 and 2023, respectively. Amortization expense related to deferred contract costs is included in Compensation, benefits and other personnel on the accompanying Consolidated Statements of Operations. There were no material impairment losses in relation to deferred contract costs during the three months ended March 31, 2024.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2024		December 31, 2023
Accrued employee compensation	$	54,872	$	107,495
Accrued employee benefits and other personnel	2,445		9,797
Accrued voluntary separation program	14,657		21,058
Accrued consulting, outsourcing and professional fees	31,780		32,285
Accrued sub-advisory, distribution and other asset management fees	52,169		49,405
Accrued dividend payable	715		61,104
Accrued income taxes	41,032		4,965
Other accrued liabilities	45,186		32,836
Total accrued liabilities	$	242,856	$	318,945

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), and 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 2027 to 2041.

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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 three months ended March 31, 2024 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2023. The Company had no Level 3 financial assets at March 31, 2024 or December 31, 2023 that were required to be measured at fair value on a recurring basis. The Company's Level 3 financial liabilities at March 31, 2024 and December 31, 2023 consist entirely of the estimated fair value of the contingent consideration resulting from an acquisition (See Note 12). There were no transfers of financial assets between levels within the fair value hierarchy during the three months ended March 31, 2024.

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	March 31, 2024		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	37,842	$	37,842	$	—
Available-for-sale debt securities	126,185		—		126,185
Fixed-income securities owned	31,958		—		31,958
Investment funds sponsored by LSV (1)	8,149
	$	204,134	$	37,842	$	158,143

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2023		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	36,661	$	36,661	$	—
Available-for-sale debt securities	118,752		—		118,752
Fixed-income securities owned	31,334		—		31,334
Investment funds sponsored by LSV (1)	7,316
	$	194,063	$	36,661	$	150,086

(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).

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 SEI-sponsored and non-SEI-sponsored money market funds and commercial paper classified as cash equivalents had a fair value of $598,118 and $565,588 at March 31, 2024 and December 31, 2023, respectively. There were no material unrealized or realized gains or losses from these investments during the three months ended March 31, 2024 and 2023. Investments in money market funds and commercial paper are Level 1 assets.

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Available for Sale and Equity Securities

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

	At March 31, 2024
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	136,848	$	—	$	(10,663)	$	126,185
SEI-sponsored mutual funds	30,956		1,271		(5)		32,222
Equities and other mutual funds	5,335		285		—		5,620
	$	173,139	$	1,556	$	(10,668)	$	164,027

	At December 31, 2023
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	127,681	$	—	$	(8,929)	$	118,752
SEI-sponsored mutual funds	30,427		818		(19)		31,226
Equities and other mutual funds	5,301		134		—		5,435
	$	163,409	$	952	$	(8,948)	$	155,413

Net unrealized losses at March 31, 2024 of available-for-sale debt securities were $8,211 (net of income tax benefit of $2,452). Net unrealized losses at December 31, 2023 of available-for-sale debt securities were $6,875 (net of income tax benefit of $2,054). These unrealized losses are associated with the Company’s investments in mortgage-backed securities issued by GNMA and were caused by interest rate increases (See Note 4). The contractual cash flows of these securities are guaranteed by an agency of the U.S. government. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost bases of the Company's investments. The Company does not intend to sell the investments and it is not likely that the Company will be required to sell the investments before recovery of their amortized cost bases. These net unrealized losses are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

The following tables provide the scheduled maturities of the Company's available-for-sale debt securities:

	At March 31, 2024
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	5,118		4,661
After 5 years through 10 years	20,836		18,811
After 10 years	110,894		102,713
	$	136,848	$	126,185

	At December 31, 2023
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	5,679		5,035
After 5 years through 10 years	31,162		28,084
After 10 years	90,840		85,633
	$	127,681	$	118,752

There were no material realized gains or losses from available-for-sale debt securities during the three months ended March 31, 2024 and 2023, respectively.

There were gross realized gains of $595 and gross realized losses of $46 from mutual funds and equities during the three months ended March 31, 2024. There were no material realized gains or losses from mutual funds and equities during the three months ended March 31, 2023. Gains and losses from mutual funds and equities are reflected in Net gain from investments on the accompanying Consolidated Statements of Operations.

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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 gain from investments on the accompanying Consolidated Statements of Operations.

The funds had a fair value of $8,149 and $7,316 at March 31, 2024 and December 31, 2023, respectively. The Company recognized unrealized gains of $833 and unrealized losses of $171 during the three months ended March 31, 2024 and 2023, 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 $31,958 and $31,334 at March 31, 2024 and December 31, 2023, respectively. There were no material net gains or losses related to the securities during the three months ended March 31, 2024 and 2023.

Note 6.    Line of Credit

The Company has a five-year $325,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, N.A., and a syndicate of other lenders. 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 Adjusted Term Secured Overnight Financing Rate (SOFR) 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 Prime Rate, b) the Federal Funds Rate plus 0.50% and c) the Adjusted Term SOFR for a one-month tenor in effect on such day plus 1.00%.

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 0.20% 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.

The Company was in compliance with all covenants of the Credit Facility during the three months ended March 31, 2024. As of April 11, 2024, the Company had outstanding letters of credit of $4,866 under the Credit Facility. The amount of the Credit Facility that is available for general corporate purposes as of April 11, 2024 was $320,134.

Note 7.    Shareholders’ Equity

Stock-Based Compensation

The Company has non-qualified stock options and restricted stock units (RSUs) outstanding under its equity compensation plans. The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three months ended March 31, 2024 and 2023, respectively, as follows: 

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	Three Months Ended March 31,
	2024		2023
Stock-based compensation expense	$	11,059	$	8,074
Less: Deferred tax benefit	(2,213)		(1,492)
Stock-based compensation expense, net of tax	$	8,846	$	6,582

The vesting of the Company's RSUs are time-based and are not based on the achievement of performance targets. The majority of the Company's RSUs will vest on the third anniversary of the issuance date. 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 revised its estimate of when some vesting targets are expected to be achieved. This change in management's estimate resulted in an increase of $310 in stock-based compensation expense during the three months ended March 31, 2024.

As of March 31, 2024, there was approximately $115,038 of unrecognized compensation cost remaining related to unvested employee stock options and restricted stock units 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 three months ended March 31, 2024 was $18,831. The total options exercisable as of March 31, 2024 had an intrinsic value of $91,066. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of March 31, 2024 and the weighted average exercise price of the options. The market value of the Company’s common stock as of March 31, 2024 was $71.90 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of March 31, 2024 was $55.78. Total options that were outstanding as of March 31, 2024 were 15,968,000. Total options that were exercisable as of March 31, 2024 were 5,649,000.

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 808,000 shares at a total cost of $56,001 during the three months ended March 31, 2024, which reduced the total shares outstanding of common stock. The cost of stock purchases during the period includes the cost of excise taxes applicable to stock repurchases and certain transactions that settled in the following quarter. As of March 31, 2024, the Company had approximately $226,077 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.

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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, 2024	$	(30,157)	$	(6,875)	$	(37,032)
Other comprehensive loss before reclassifications	(2,923)		(1,231)		(4,154)
Amounts reclassified from accumulated other comprehensive loss	—		(105)		(105)
Net current-period other comprehensive loss	(2,923)		(1,336)		(4,259)
Balance, March 31, 2024	$	(33,080)	$	(8,211)	$	(41,291)

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 Outsourced Chief Investment Officer 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

Investments in New Businesses – Focuses on providing investment management solutions to ultra-high-net-worth families residing in the United States, hosted technology services to family offices and financial institutions; developing network and data protection services; 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 months ended March 31, 2024 and 2023. Assets are not allocated to segments for internal reporting purposes. 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, 2023.

During the three months ended March 31, 2024 and made effective January 1, 2024, the Company made a determination to reorganize some of its business segments based on how its current Chief Operating Decision Maker (CODM) manages its businesses, including with respect to resource allocation and performance assessment. As a result, one of the Company's client relationships formerly reported in the Private Banks segment will be reported in the Investment Managers segment and the Company’s family office services business, formerly reported in the Investment Managers segment, will be reported in the Investments in New Businesses segment. The business segment financial presentation was reclassified in 2024 to conform to this reorganization. Prior year amounts have been reclassified to conform to current year presentation.

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The following tables highlight certain financial information about each of the business segments for the three months ended March 31, 2024 and 2023:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended March 31, 2024
Revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579
Expenses	112,974		66,958		40,109		109,550		18,383		347,974
Operating profit (loss)	$	17,163	$	55,760	$	31,669	$	63,103	$	(4,090)	$	163,605

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended March 31, 2023
Revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119
Expenses	112,462		63,546		40,868		101,685		17,639		336,200
Operating profit (loss)	$	8,440	$	42,992	$	33,422	$	52,812	$	(4,747)	$	132,919

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 March 31, 2024 and 2023 is as follows:

	2024		2023
Total operating profit from segments	$	163,605	$	132,919
Corporate overhead expenses	(37,754)		(31,152)
Income from operations	$	125,851	$	101,767

The following tables provide additional information for the three months ended March 31, 2024 and 2023 pertaining to the business segments:

	Capital Expenditures (1)				Depreciation
	2024		2023		2024		2023
Private Banks	$	6,432	$	9,071	$	2,904	$	5,354
Investment Advisors	3,165		4,339		2,181		468
Institutional Investors	1,119		648		604		282
Investment Managers	7,675		4,566		1,579		1,992
Investments in New Businesses	416		382		172		231
Total from business segments	$	18,807	$	19,006	$	7,440	$	8,327
Corporate overhead	542		615		949		204
	$	19,349	$	19,621	$	8,389	$	8,531

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

	Amortization
	2024		2023
Private Banks	$	5,111	$	4,646
Investment Advisors	2,122		1,818
Institutional Investors	1,892		1,824
Investment Managers	—		177
Investments in New Businesses	1,182		895
Total from business segments	$	10,307	$	9,360
Corporate overhead	79		64
	$	10,386	$	9,424

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Note 10.    Income Taxes

The gross liability for unrecognized tax benefits at March 31, 2024 and December 31, 2023 was $16,383 and $15,532, respectively, exclusive of interest and penalties, of which $15,849 and $14,878 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 March 31, 2024 and December 31, 2023, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $1,655 and $1,385, respectively.

	March 31, 2024		December 31, 2023
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	16,383	$	15,532
Interest and penalties on unrecognized benefits	1,655		1,385
Total gross uncertain tax positions	$	18,038	$	16,917
Amount included in Current liabilities	$	3,658	$	3,837
Amount included in Other long-term liabilities	14,380		13,080
	$	18,038	$	16,917

The effective income tax rate for the three months ended March 31, 2024 and 2023 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2024		2023
Statutory rate	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.9		2.9
Foreign tax expense and tax rate differential	0.1		(0.1)
Tax benefit from stock option exercises	(1.1)		(0.2)
	22.9	%	23.6	%

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 2020 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2018.

The Company estimates it will recognize $3,658 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.

The Organization for Economic Co-operation and Development (OECD) has a framework to implement a global minimum corporate tax of 15% for companies with global revenues and profits above certain thresholds (referred to as Pillar Two). Certain aspects of Pillar Two are effective January 1, 2024 and other aspects are effective January 1, 2025. While it is uncertain whether the U.S. will enact legislation to adopt Pillar Two, certain countries in which we operate have adopted legislation, and other countries are in the process of introducing legislation to implement Pillar Two. We do not expect Pillar Two to have a material impact on our effective tax rate or our consolidated results of operation, financial position, or cash flows.

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.

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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 recognized on the Consolidated Balance Sheet as of March 31, 2024 and December 31, 2023 related to these indemnifications.

Legal Proceedings

The Company is a party to various disputes, actions and claims 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, if any, 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 upon which these beliefs are based may be incorrect and, if so, 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

The changes in the carrying amount of the Company's goodwill by segment are as follows:

	Institutional Investors		Investment Managers		Investments in New Businesses		Total
Balance, December 31, 2023	$	61,884	$	56,990	$	18,459	$	137,333
Reclassification due to segment reorganization	—		(1,711)		1,711		—
Foreign currency translation adjustments	(128)		(1)		—		(129)
Balance, March 31, 2024	$	61,756	$	55,278	$	20,170	$	137,204

The reclassification of the Company's goodwill by segment during the three months ended March 31, 2024 reflects the relative fair value allocation of the goodwill related to the businesses that were reclassified into the new segment (See Note 9).

In November 2023, the Company's wholly-owned operating subsidiary in the United Kingdom, SIEL, acquired all of the outstanding equity of XPS Pensions (Nexus) Limited, principal employer and scheme funder of the National Pensions Trust (NPT), from its parent company, XPS Pensions Group PLC (XPS). The total purchase price for XPS Pensions (Nexus) Limited included a contingent consideration payable to the sellers subject to the achievement of certain post-closing performance measurements determined during intervals occurring within two years immediately following the closing date. As of March 31, 2024, the current portion of the contingent consideration of $915 is included in Accrued liabilities on the accompanying Balance Sheet. The long-term portion of the contingent consideration of $2,618 is included in Other long-term liabilities on the accompanying Balance Sheet.

The Company recognized $3,403 and $3,055 of amortization expense related to acquired intangible assets during the three months ended March 31, 2024 and 2023, respectively.

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.

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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 March 31, 2024 and 2023:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2024
Investment management fees from pooled investment products	$	32,399	$	58,597	$	12,074	$	84	$	356	$	103,510
Investment management fees from investment management agreements	931		48,161		54,209		—		4,308		107,609
Investment operations fees	539		9,644		—		164,189		1,478		175,850
Investment processing fees - PaaS	67,846		1,281		423		1,258		10		70,818
Investment processing fees - SaaS	23,459		—		2,088		19		5,097		30,663
Professional services fees	4,115		—		—		1,017		583		5,715
Account fees and other	848		5,035		2,984		6,086		2,461		17,414
Total revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579
Primary Geographic Markets:
United States	$	85,775	$	122,718	$	59,376	$	155,959	$	14,293	$	438,121
United Kingdom	29,848		—		9,218		—		—		39,066
Canada	9,799		—		1,471		—		—		11,270
Ireland	4,715		—		1,713		9,906		—		16,334
Luxembourg	—		—		—		6,788		—		6,788
Total revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2023
Investment management fees from pooled investment products	$	32,220	$	60,605	$	11,713	$	126	$	338	$	105,002
Investment management fees from investment management agreements	498		40,666		58,028		—		4,217		103,409
Investment operations fees	346		—		—		145,639		1,555		147,540
Investment processing fees - PaaS	60,865		1,254		194		1,044		11		63,368
Investment processing fees - SaaS	22,215		—		2,651		18		4,207		29,091
Professional services fees	3,792		—		—		1,661		349		5,802
Account fees and other	966		4,013		1,704		6,009		2,215		14,907
Total revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119
Primary Geographic Markets:
United States	$	78,469	$	106,538	$	62,218	$	140,083	$	12,892	$	400,200
United Kingdom	27,846		—		9,095		—		—		36,941
Canada	10,090		—		1,369		—		—		11,459
Ireland	4,497		—		1,608		9,025		—		15,130
Luxembourg	—		—		—		5,389		—		5,389
Total revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119

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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. Also includes income from client cash balances held in the FDIC-insured accounts through the SEI Integrated Cash program. 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 a monthly fee plus additional fees determined on a per-account or per-transaction basis. Contractual fees can also be stated as 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 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.

Revenues associated with clients of the mutual fund trading solution are fees recognized for shareholder services and related services through the use of the Company's proprietary platform or through third-party vendor agreements. Contractual fees are stated as a percentage of the value of total assets or positions processed on the Company's platform or subject to third-party vendor agreements each month. Fees are billed and collected on a monthly and quarterly basis. These revenues were previously classified under Account fees and other in 2023 and have been reclassified to conform to the current year presentation.

Investment processing fees - Software as a Service - Revenues associated with clients of the Private Banks segment for application software services. Clients 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 associated with clients of the Investments in New Businesses segment processed on the Archway PlatformSM are fees for hosted technology services to family offices and financial institutions. The Archway Platform is an integrated technology platform used for investment, operations, accounting and client reporting by these institutions. The contractual fee is based on a monthly subscription fee to access the Archway Platform along with additional fees on a per transaction basis.

Revenues associated with clients of the Institutional Investors segment processed on the SEI NovusSM portfolio intelligence tool are fees for data management, performance measurement, reporting, and risk analytics. The contractual fee is based on a fixed fee to access SEI Novus and includes fees for integration of historical fund data and custom reporting.

All revenues from investment processing fees 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.

23

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.

Note 14.    Subsequent Event

The Company is currently in the process of entering into an agreement of sale pending finalization of certain administrative items related to a condominium owned by the Company located in New York, New York. The sale is expected to close during the second quarter 2024 subject to the completion of all terms and conditions of the agreement. If a transaction is finalized, the Company expects to recognize a net pre-tax gain of approximately $8,000 to $8,500 after associated costs and expenses once the sale is finalized.

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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, 2023.

Overview

Consolidated Summary

SEI delivers technology and investment solutions that connect the financial services industry. With capabilities across investment processing, operations, and asset management, SEI works with corporations, financial institutions and professionals, and ultra-high-net-worth families to help drive growth, make confident decisions, and protect futures. 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. As of March 31, 2024, through our subsidiaries and partnerships in which we have a significant interest, we manage, advise or administer $1.5 trillion in hedge, private equity, mutual fund and pooled or separately managed assets.

Condensed Consolidated Statements of Operations for the three months ended March 31, 2024 and 2023 were:

	Three Months Ended March 31,				Percent Change*
	2024		2023
Revenues	$	511,579	$	469,119	9%
Expenses	385,728		367,352		5%
Income from operations	125,851		101,767		24%
Net gain from investments	2,256		744		NM
Interest income, net of interest expense	10,680		8,637		24%
Equity in earnings from unconsolidated affiliate	31,643		28,879		10%
Income before income taxes	170,430		140,027		22%
Income taxes	39,030		33,012		18%
Net income	131,400		107,015		23%
Diluted earnings per common share	$	0.99	$	0.79	25%

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

The following items had a significant impact on our financial results for the three months ended March 31, 2024 and 2023:

•Revenue from Assets under management, administration, and distribution fees increased in the first three months of 2024 primarily from higher assets under administration due to sales to new and existing alternative investment clients of the Investment Managers segment. Average assets under administration increased $121.0 billion, or 14%, to $961.7 billion during the first quarter 2024, as compared to $840.7 billion during the first quarter 2023.

•Revenue from Asset management, administration and distribution fees also increased during the first quarter from market appreciation and positive cash flows into separately managed account programs and Strategist programs of the Investment Advisors segment. Negative cash flows from SEI fund programs in the Investment Advisors segment and client losses in the Institutional Investors segment partially offset the increase in revenues. Average assets under management in equity and fixed income programs, excluding LSV, increased $8.1 billion, or 5%, to $175.9 billion in the first quarter of 2024 as compared to $167.8 billion during the first quarter of 2023.

•Fees from the SEI Integrated Cash Program of the Investment Advisors segment launched in December 2023 were $9.6 million during the first quarter of 2024.

•Revenue from Information processing and software servicing fees increased in the first quarter of 2024 primarily from higher assets from new and existing clients processed on the SEI Wealth PlatformSM (SWP).

•Earnings from LSV increased to $31.6 million in the first quarter of 2024 as compared to $28.9 million in the first quarter of 2023 due to higher performance fees and market appreciation. Negative cash flows from existing clients and client losses partially offset the increase in earnings from LSV.

•Operating expenses increased from higher personnel costs due to business growth, primarily in the Investment Managers segment, severance costs of $6.2 million, and the impact of inflation on wages and services. Cost

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containment measures related to consulting and other outsourced vendor costs partially offset the increase in operating expenses in the first quarter of 2024.

•Capitalized software development costs were $6.3 million in the first quarter of 2024, of which $3.8 million was for continued enhancements to SWP. Capitalized software development costs also include $2.5 million of software development costs in the first quarter of 2024 for a new platform for the Investment Managers segment.

•Amortization expense related to SWP was $6.8 million in the first quarter of 2024 as compared to $6.2 million in the first quarter of 2023.

•Effective tax rates were 22.9% in the first quarter of 2024 and 23.6% in the first quarter of 2023.

•SEI repurchased 808 thousand shares of its common stock for $56.0 million in the first quarter of 2024.

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Ending Asset Balances

(In millions)

	As of March 31,				Percent Change
	2024		2023
Private Banks:
Equity and fixed-income programs	$	25,282	$	23,653	7%
Collective trust fund programs	5		6		(17)%
Liquidity funds	2,733		3,427		(20)%
Total assets under management	$	28,020	$	27,086	3%
Client assets under administration	8,024		4,299		87%
Total assets	$	36,044	$	31,385	15%
Investment Advisors:
Equity and fixed-income programs	$	74,715	$	68,065	10%
Liquidity funds	4,722		4,965		(5)%
Total Platform assets under management	$	79,437	$	73,030	9%
Platform-only assets	20,516		14,980		37%
Platform-only assets-deposit program	897		—		NM
Total Platform assets	$	100,850	$	88,010	15%
Institutional Investors:
Equity and fixed-income programs	$	75,969	$	74,939	1%
Collective trust fund programs	1		4		(75)%
Liquidity funds	2,179		1,576		38%
Total assets under management	$	78,149	$	76,519	2%
Client assets under advisement	6,862		4,559		51%
Total assets	$	85,011	$	81,078	5%
Investment Managers:
Collective trust fund programs (A)	$	161,660	$	146,176	11%
Liquidity funds	202		203		—%
Total assets under management	$	161,862	$	146,379	11%
Client assets under administration (E)	959,904		829,352		16%
Total assets	$	1,121,766	$	975,731	15%
Investments in New Businesses:
Equity and fixed-income programs	$	2,269	$	2,031	12%
Liquidity funds	223		217		3%
Total assets under management	$	2,492	$	2,248	11%
Client assets under advisement	1,248		1,081		15%
Client assets under administration (E)	15,411		16,476		(6)%
Total assets	$	19,151	$	19,805	(3)%
LSV:
Equity and fixed-income programs (B)	$	93,616	$	84,964	10%

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Total:
Equity and fixed-income programs (C)	$	271,851	$	253,652	7%
Collective trust fund programs	161,666		146,186		11%
Liquidity funds	10,059		10,388		(3)%
Total assets under management	$	443,576	$	410,226	8%
Client assets under advisement	8,110		5,640		44%
Client assets under administration (D)	983,339		850,127		16%
Platform-only assets	21,413		14,980		43%
Total assets	$	1,456,438	$	1,280,973	14%

(A)Collective trust fund program assets are included in assets under management since SEI is the trustee. Fees earned on this product are less than fees earned on customized asset management programs.

(B)    Equity and fixed-income programs include $2.0 billion of assets managed by LSV in which fees are based solely on performance and are not calculated as an asset-based fee (as of March 31, 2024).

(C)    Equity and fixed-income programs include $6.4 billion of assets invested in various asset allocation funds at March 31, 2024.

(D)    In addition to the assets presented, SEI also administers an additional $11.0 billion in Funds of Funds assets on which SEI does not earn an administration fee (as of March 31, 2024).

(E)    Due to the reorganization of business segments, client assets under administration were reclassified from Investment Managers to Investments in New Businesses (See Note 9 to the Consolidated Financial Statements).

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Average Asset Balances

(In millions)

	Three Months Ended March 31,				Percent Change
	2024		2023
Private Banks:
Equity and fixed-income programs	$	24,593	$	23,576	4%
Collective trust fund programs	4		7		(43)%
Liquidity funds	3,902		3,253		20%
Total assets under management	$	28,499	$	26,836	6%
Client assets under administration	7,753		4,316		80%
Total assets	$	36,252	$	31,152	16%
Investment Advisors:
Equity and fixed-income programs	$	72,689	$	67,578	8%
Liquidity funds	4,649		4,995		(7)%
Total Platform assets under management	$	77,338	$	72,573	7%
Platform-only assets	19,198		14,812		30%
Platform-only assets-deposit program	849		—		NM
Total Platform assets	$	97,385	$	87,385	11%
Institutional Investors:
Equity and fixed-income programs	$	76,414	$	74,653	2%
Collective trust fund programs	1		5		(80)%
Liquidity funds	1,812		1,715		6%
Total assets under management	$	78,227	$	76,373	2%
Client assets under advisement	6,498		4,431		47%
Total assets	$	84,725	$	80,804	5%
Investment Managers:
Collective trust fund programs (A)	$	156,737	$	144,914	8%
Liquidity funds	207		317		(35)%
Total assets under management	$	156,944	$	145,231	8%
Client assets under administration (E)	938,804		820,014		14%
Total assets	$	1,095,748	$	965,245	14%
Investments in New Businesses:
Equity and fixed-income programs	$	2,200	$	1,991	10%
Liquidity funds	214		212		1%
Total assets under management	$	2,414	$	2,203	10%
Client assets under advisement	1,194		1,098		9%
Client assets under administration (E)	15,147		16,396		(8)%
Total assets	$	18,755	$	19,697	(5)%
LSV:
Equity and fixed-income programs (B)	$	90,708	$	86,987	4%

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Total:
Equity and fixed-income programs (C)	$	266,604	$	254,785	5%
Collective trust fund programs	156,742		144,926		8%
Liquidity funds	10,784		10,492		3%
Total assets under management	$	434,130	$	410,203	6%
Client assets under advisement	7,692		5,529		39%
Client assets under administration (D)	961,704		840,726		14%
Platform-only assets	20,047		14,812		35%
Total assets	$	1,423,573	$	1,271,270	12%

(A)    Collective trust fund program average assets are included in assets under management since SEI is the trustee. Fees earned on this product are less than fees earned on customized asset management programs.

(B)    Equity and fixed-income programs include assets managed by LSV in which fees are based solely on performance and are not calculated as an asset-based fee. The average value of these assets for the three months ended March 31, 2024 was $1.9 billion.

(C)    Equity and fixed-income programs include $6.3 billion of average assets invested in various asset allocation funds for the three months ended March 31, 2024.

(D)    In addition to the assets presented, SEI also administers an additional $11.1 billion of average assets in Funds of Funds assets for the three months ended March 31, 2024 on which SEI does not earn an administration fee.

(E)    Due to the reorganization of business segments, client assets under administration were reclassified from Investment Managers to Investments in New Businesses (See Note 9 to the Consolidated Financial Statements).

In the preceding tables, assets under management are total assets of our clients or their customers invested in our 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. Advised assets 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-deposit program include assets of our clients in the SEI Integrated Cash program for which we provide custody services through our federal thrift subsidiary. 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 months ended March 31, 2024 compared to the three months ended March 31, 2023 were as follows:

	Three Months Ended March 31,						Percent Change
	2024			2023
Private Banks:
Revenues	$	130,137		$	120,902		8%
Expenses	112,974			112,462			—%
Operating Profit	$	17,163		$	8,440		103%
Operating Margin	13		%	7		%
Investment Advisors:
Revenues	$	122,718		$	106,538		15%
Expenses	66,958			63,546			5%
Operating Profit	$	55,760		$	42,992		30%
Operating Margin	45		%	40		%
Institutional Investors:
Revenues	$	71,778		$	74,290		(3)%
Expenses	40,109			40,868			(2)%
Operating Profit	$	31,669		$	33,422		(5)%
Operating Margin	44		%	45		%
Investment Managers:
Revenues	$	172,653		$	154,497		12%
Expenses	109,550			101,685			8%
Operating Profit	$	63,103		$	52,812		19%
Operating Margin	37		%	34		%
Investments in New Businesses:
Revenues	$	14,293		$	12,892		11%
Expenses	18,383			17,639			4%
Operating Loss	$	(4,090)		$	(4,747)		NM

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

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Private Banks

	Three Months Ended March 31,				Percent Change
	2024		2023
Revenues:
Information processing and software servicing fees	$	96,178	$	88,277	9%
Asset management, administration & distribution fees	33,959		32,625		4%
Total revenues	$	130,137	$	120,902	8%

Revenues increased $9.3 million, or 8%, in the three month period ended March 31, 2024 and were primarily affected by:

•Increased investment processing fees from new SWP client conversions and growth from existing SWP clients due to market appreciation and increased transaction volumes; and

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

•Lower investment processing fees earned on our mutual fund trading solution.

Operating margins increased to 13% compared to 7% in the three month period. Operating income increased by $8.7 million, or 103%, in the three month period and was primarily affected by:

•An increase in revenues; and

•Decreased costs, mainly consulting and other outsourced vendor costs from cost containment measures.

Investment Advisors

	Three Months Ended March 31,				Percent Change
	2024		2023
Revenues:
Investment management fees-SEI fund programs	$	58,597	$	60,605	(3)%
Separately managed account fees	48,161		40,666		18%
Other fees	15,960		5,267		203%
Total revenues	$	122,718	$	106,538	15%

Revenues increased $16.2 million, or 15%, in the three month period ended March 31, 2024 and were primarily affected by:

•Increased fees from separately managed account programs and Strategist programs due to growth from existing clients and market appreciation; and

•New fee revenue of $9.6 million from the SEI Integrated Cash Program launched in December 2023; partially offset by

•Decreased investment management fees from SEI fund programs resulting from the continued shift out of SEI fund programs into separately managed accounts and other investment products.

Operating margin increased to 45% compared to 40% in the three month period. Operating income increased $12.8 million, or 30%, in the three month period and was primarily affected by:

•An increase in revenues;

•Decreased non-capitalized consulting costs; and

•Decreased stock-based compensation costs; partially offset by

•Increased direct expenses associated with the increase in separately managed account fees.

Institutional Investors

Revenues decreased $2.5 million, or 3%, in the three month period ended March 31, 2024 and were primarily affected by:

•Decreased investment management fees from client losses; partially offset by

•Increased investment management fees from existing clients due to higher assets under management due to market appreciation.

Operating margin decreased to 44% compared to 45% in the three month period. Operating income decreased $1.8 million, or 5%, in the three month period and was primarily affected by:

•A decrease in revenues; partially offset by

•Decreased direct expenses associated with investment management fees; and

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•Decreased personnel costs.

Investment Managers

Revenues increased $18.2 million, or 12%, in the three month period ended March 31, 2024 and were primarily affected by:

•Increased revenues from additional services provided to our largest alternative fund clients; and

•Positive cash flows into alternative and traditional funds from new and existing clients; partially offset by

•Client losses and fund closures.

Operating margin increased to 37% compared to 34% in the three month period. Operating income increased $10.3 million, or 19%, in the three month period and was primarily affected by:

•An increase in revenues; and

•Decreased non-capitalized investment spending, mainly consulting costs; partially offset by

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

•Costs to enhance, support and maintain technologies and investment service capabilities.

Investments in New Businesses

	Three Months Ended March 31,				Percent Change
	2024		2023
Revenues:
SEI Family Office Services	$	8,795	$	7,890	11%
SEI Private Wealth Management	4,708		4,611		2%
Other	790		391		102%
Total revenues	$	14,293	$	12,892	11%

Revenues increased $1.4 million, or 11% in the three month period ended March 31, 2024 and were primarily affected by:

•Increased revenues from hosted technology offerings through SEI Family Office Services due to higher assets under administration and increased non-recurring implementation fees.

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 $37.8 million and $31.2 million in the three months ended March 31, 2024 and 2023, respectively. The increase in corporate overhead expenses is primarily due to severance costs of $6.2 million and investments in upgrading and enhancing various technologies utilized by corporate overhead units. Additionally, personnel costs increased from enhancements to further build our compliance infrastructure.

Other income and expense

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

	Three Months Ended March 31,
	2024		2023
Net gain from investments	$	2,256	$	744
Interest and dividend income	10,819		8,778
Interest expense	(139)		(141)
Equity in earnings of unconsolidated affiliate	31,643		28,879
Total other income and expense items, net	$	44,579	$	38,260

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Net gain from investments

Net gain from investments in the three months ended March 31, 2024 were primarily due to unrealized mark-to-market gains recorded in current earnings associated with LSV-sponsored investment funds and Company-sponsored investment funds from market appreciation (See Note 5).

Interest and dividend income

Interest and dividend income is earned based upon the amount of cash that is invested daily. The increase in interest and dividend income in the three months ended March 31, 2024 was due to an overall increase in interest rates.

Equity in earnings of unconsolidated affiliate

Equity in earnings of unconsolidated affiliate reflects our ownership interest in LSV. As of March 31, 2024, our total partnership interest in LSV was 38.6%. The table below presents the revenues and net income of LSV and the proportionate share in LSV's earnings.

	Three Months Ended March 31,				Percent Change
	2024		2023
Revenues of LSV	$	107,349	$	98,192	9%
Net income of LSV	82,012		74,774		10%
SEI's proportionate share in earnings of LSV	$	31,643	$	28,879	10%

The increase in earnings from LSV in the three months ended March 31, 2024 was primarily due to higher performance fees and 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 $3.7 billion to $90.7 billion during the three months ended March 31, 2024 as compared to $87.0 billion during the three months ended March 31, 2023, an increase of 4%.

Amortization

Amortization expense on the accompanying Consolidated Statements of Operations consists of: 

	Three Months Ended March 31,				Percent Change
	2024		2023
Capitalized software development costs	$	6,904	$	6,305	10%
Intangible assets acquired through acquisitions and asset purchases	3,403		3,055		11%
Other	79		64		23%
Total amortization expense	$	10,386	$	9,424	10%

Capitalized software development costs

The increase in amortization expense related to capitalized software development costs during the three months ended March 31, 2024 was primarily due significant enhancements to SWP (See Note 1 to the Consolidated Financial Statements).

Income Taxes

The effective income tax rates for the three months ended March 31, 2024 and 2023 differ from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2024		2023
Statutory rate	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.9		2.9
Foreign tax expense and tax rate differential	0.1		(0.1)
Tax benefit from stock option exercises	(1.1)		(0.2)
	22.9	%	23.6	%

Stock-Based Compensation

We recognized $11.1 million and $8.1 million in stock-based compensation expense during the three months ended March 31, 2024 and 2023, respectively. The increase in expense was primarily due to new equity awards granted during

34

the fourth quarter 2023. The amount of stock-based compensation expense recognized is primarily based upon management's estimate of when the financial vesting targets of outstanding stock options 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 (See Note 7 to the Consolidated Financial Statements).

We expect to recognize approximately $42.5 million in stock-based compensation expense during the remainder of 2024.

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 issuer pools that are valued based on current market data of similar assets. Level 3 financial liabilities at March 31, 2024 and December 31, 2023 consist entirely of the estimated fair value of the 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 

	Three Months Ended March 31,
	2024		2023
Net cash provided by operating activities	$	112,294	$	114,364
Net cash used in investing activities	(37,634)		(16,988)
Net cash used in financing activities	(62,157)		(118,589)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(572)		2,561
Net increase (decrease) in cash, cash equivalents and restricted cash	11,931		(18,652)
Cash, cash equivalents and restricted cash, beginning of period	834,998		853,359
Cash, cash equivalents and restricted cash, end of period	$	846,929	$	834,707

Our credit facility provides for borrowings up to $325.0 million and is scheduled to expire in April 2026 (See Note 6 to the Consolidated Financial Statements). As of April 11, 2024, we had outstanding letters of credit of $4.9 million which reduced the amount available under the credit facility. These letters of credit were primarily issued for the expansion of the corporate headquarters and are due to expire in late 2024. As of April 11, 2024, the amount of the credit facility available for corporate purposes was $320.1 million.

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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 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 large, well-established financial institutions located in the United States. The institutions we utilize have not indicated any stability issues regarding the ability to honor current or future deposit obligations to their customers. 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 April 11, 2024, the amount of cash and cash equivalents considered free and immediately accessible for other general corporate purposes was $497.5 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 decreased $2.1 million in the first three months of 2024 compared to the first three months of 2023 primarily from the negative impact from the change in working capital accounts. The increase in net income partially offset the decline in cash flows from operations.

Net cash used in investing activities includes:

•Purchases, sales and maturities of marketable securities. Purchases, sales and maturities of marketable securities in the first three months of 2024 and 2023 were as follows:

	Three Months Ended March 31,
	2024		2023
Purchases	$	(41,650)	$	(21,777)
Sales and maturities	32,116		28,387
Net investing activities from marketable securities	$	(9,534)	$	6,610

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 $6.3 million of software development costs in the first three months of 2024 as compared to $9.0 million in the first three months of 2023. Software development costs are principally related to significant enhancements for the expanded functionality of the SEI Wealth Platform and a new platform for the Investment Managers segment.

•Capital expenditures. Capital expenditures in the first three months of 2024 were $13.1 million as compared to $10.6 million in the first three months of 2023. Expenditures in 2024 and 2023 include capital outlays for purchased software and equipment for data center operations. 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. In February 2024, we made a strategic investment of $10.0 million in an innovation platform for wealth management.

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 $46.8 million during the first three months of 2024 and $81.2 million during the first three months of 2023 for the repurchase of common stock.

•Proceeds from the issuance of common stock. We received $45.0 million and $21.4 million in proceeds from the issuance of common stock during the first three months of 2024 and 2023, respectively. These proceeds were primarily from stock option exercise activity.

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•Dividend payments. Cash dividends paid were $60.4 million in the first three months of 2024 as compared to $57.8 million in the first three months of 2023.

Cash Requirements

Cash requirements and liquidity needs are primarily funded through cash flow from operations and our capacity for additional borrowing. At March 31, 2024, unused sources of liquidity consisted of cash and cash equivalents and the amount available under our credit facility.

We are obligated to make payments in connection with the credit facility, operating leases, maintenance contracts and other commitments. We believe our operating cash flow, available borrowing capacity, and existing cash and cash equivalents will provide adequate funds for these obligations and ongoing operations. We currently anticipate that our available funds and cash flow from operations will be sufficient to meet our operational cash needs and fund our stock repurchase program for at least the next 12 months and for the foreseeable future.

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 and significant changes in the value of financial instruments that may affect our revenues and earnings;

•product development risk;

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

•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;

•consolidation within our target markets;

•external factors affecting the fiduciary management market;

•software defects, development delays or installation difficulties, which would harm our business and reputation and expose us to potential liability;

•data and cyber security risks;

•risk of the disclosure and misuse of personal data;

•risk of outages, data losses, and disruptions of services;

•intellectual property risks;

•third-party service providers in our operations;

•poor investment performance of our investment products or a client preference for products other than those which we offer or for products that generate lower fees;

•investment advisory contracts which may be terminated or may not be renewed on favorable terms;

•the effect of governmental regulation;

•our ability to meet competing and/or conflicting regulatory requirements of the different jurisdictions;

•our ability to address conflicts of interest appropriately;

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

•the results of commercial disputes, litigation and regulatory examinations and investigations;

•effective business strategies;

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

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

37

•operational risks associated with the processing of investment transactions;

•disruptions of operations of other participants in the global financial system;

•our ability to hire and retain qualified employees;

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

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

•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;

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

•stockholder activism efforts;

•retention of executive officers and senior management personnel;

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

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

•geopolitical unrest and other events;

•climate change concerns and incidents; and

•environmental, social, and governance (ESG) matters.

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 Institutional Transfer Agent, Inc., or SITA, a transfer agent registered with the SEC under the Securities Exchange Act of 1934;

•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;

•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;

•SEI Investments - Luxembourg S.A., or SEI Lux, a professional of the specialized financial sector subject to regulation by the Commission de Surveillance du Secteur Financier of the Grand Duchy of Luxembourg;

•SEI Investments Global (Cayman), Ltd., a full mutual fund administrator that is regulated by the Cayman Island Monetary Authority; and

•SEI Investments (South Africa) (PTY) Limited, a Private Company that is a licensed Financial Service Provider regulated by the Financial Sector Conduct Authority.

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 38.6% in LSV, which is also an investment advisor registered with the SEC.

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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 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 U.S. and foreign anti-money laundering and financial transparency laws that require implementation of regulations applicable to financial services companies, including standards for verifying client identification and monitoring client transactions and detecting and reporting suspicious activities. 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.

We must comply with economic sanctions and embargo programs administered by the Office of Foreign Assets Control (OFAC) and similar national and multinational bodies and governmental agencies outside the United States, as well as anti-corruption and anti-money laundering laws and regulations throughout the world. We can incur higher costs and face greater compliance risks in structuring and operating our businesses to comply with these requirements. Furthermore, a violation of a sanction or embargo program or anti-corruption or anti-money laundering laws and regulations could subject us and our subsidiaries, and individual employees, to regulatory enforcement actions as well as significant civil and criminal penalties.

Our businesses are also subject to privacy and data protection information security legal requirements concerning the use and protection of certain personal information. These include those adopted pursuant to the Gramm-Leach-Bliley Act and the Fair and Accurate Credit Transactions Act of 2003 in the United States, the General Data Protection Regulation (GDPR) in the EU, Canada’s Personal Information Protection and Electronic Documents Act, the Cayman Islands' Data Protection Law, and various other laws. Privacy and data security legislation is a priority issue in many states and localities in the United States, as well as foreign jurisdictions outside of the EU. For example, California enacted the California Consumer Privacy Act (CCPA) which broadly regulates the sale of the consumer information of California residents and grants California residents certain rights to, among other things, access and delete data about them in certain circumstances. Other states are considering similar proposals. Such attempts by the states to regulate have the potential to create a patchwork of differing and/or conflicting state regulations. Ensuring compliance under ever-evolving privacy legislation, such as GDPR and CCPA, is an ongoing commitment, which involves substantial costs.

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

39

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 the current regulatory regimes and 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 "Sensitivity of our revenues and earnings to capital market fluctuations" 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, 2023. There have been no material changes to this information as it is disclosed in our Annual Report on Form 10-K for 2023.

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.

(b) Change in Internal Control over Financial Reporting

No change in our internal control over financial reporting occurred during the quarter ended March 31, 2024 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

40

PART II.    OTHER INFORMATION

Item 1.    Legal Proceedings.

The information required by this Item is incorporated by reference from Note 11 – “Legal Proceedings” included in Part I, Item 1 of this Quarterly Report on Form 10-Q.

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, 2023. There have been no material changes in the risk factors from those disclosed in the Annual Report on Form 10-K for 2023.

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

(e)    Our Board of Directors has authorized the repurchase of up to $5.828 billion worth of our common stock through multiple authorizations through March 31, 2024. Currently, there is no expiration date for the common stock repurchase program.

Information regarding the repurchase of common stock during the three months ended March 31, 2024 is as follows:

Period	Total Number of Shares Purchased	Average Price Paid per Share (1)		Total Number of Shares Purchased as Part of Publicly Announced Program	Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program
January 2024	—	$	—	—	$	282,079,000
February 2024	175,000	66.71		175,000	270,409,000
March 2024	633,000	70.04		633,000	226,077,000
Total	808,000	$	69.32	808,000

(1) Average price paid per share does not include excise tax on stock repurchases.

Item 5.    Other Information.

During the three months ended March 31, 2024, none of our officers or directors adopted or terminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any "non-Rule 10b5-1 trading arrangement" (as defined in Item 408 (c) of Regulation S-K).

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 Principal Executive Officer.
31.2	Rule 13a-15(e)/15d-15(e) Certification of Principal 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

41

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:	April 29, 2024	By:	/s/ Dennis J. McGonigle
			Dennis J. McGonigle
			Chief Financial Officer

42

EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Ryan P. Hicke, 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: April 29, 2024

/s/ Ryan P. Hicke

Ryan P. Hicke

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: April 29, 2024

/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, Ryan P. Hicke, 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 March 31, 2024 (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:	April 29, 2024	Date:	April 29, 2024
/s/ Ryan P. Hicke		/s/ Dennis J. McGonigle
Ryan P. Hicke		Dennis J. McGonigle
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.

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	Mar. 31, 2024	Apr. 11, 2024
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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	19456-1100
City Area Code	610
Local Phone Number	676-1000
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	SEIC
Security Exchange Name	NASDAQ
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Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 846,628	$ 834,697
Restricted cash	301	301
Receivables from investment products	55,606	55,886
Receivables, net of allowance for doubtful accounts of $1,165 and $663	561,395	501,434
Securities owned	31,958	31,334
Other current assets	59,136	54,464
Total Current Assets	1,555,024	1,478,116
Property and Equipment, net of accumulated depreciation of $475,832 and $474,034	168,204	171,364
Operating Lease Right-of-Use Assets	20,687	22,477
Capitalized Software, net of accumulated amortization of $619,875 and $612,971	239,156	239,783
Available for Sale and Equity Securities	164,027	155,413
Investments in Affiliated Funds, at fair value	8,149	7,316
Investment in Unconsolidated Affiliate	57,291	110,781
Goodwill	137,204	137,333
Intangible Assets, net of accumulated amortization of $45,923 and $42,520	78,739	82,443
Deferred Contract Costs	40,000	40,221
Deferred Income Taxes	45,257	37,709
Other Assets, net	54,699	37,047
Total Assets	2,568,437	2,520,003
Current Liabilities:
Accounts payable	10,290	10,618
Accrued liabilities	242,856	318,945
Current portion of long-term operating lease liabilities	7,562	8,118
Deferred revenue	15,274	15,366
Total Current Liabilities	275,982	353,047
Long-term Income Taxes Payable	803	803
Long-term Operating Lease Liabilities	15,599	17,235
Other Long-term Liabilities	16,999	17,090
Total Liabilities	309,383	388,175
Commitments and Contingencies
Shareholders' Equity:
Common stock, $0.01 par value, 750,000,000 shares authorized; 131,329,261 and 131,177,513 shares issued and outstanding	1,313	1,312
Capital in excess of par value	1,455,162	1,404,962
Retained earnings	843,870	762,586
Accumulated other comprehensive loss, net	(41,291)	(37,032)
Total Shareholders' Equity	2,259,054	2,131,828
Total Liabilities and Shareholders' Equity	$ 2,568,437	$ 2,520,003

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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Receivables, allowance for doubtful accounts	$ 1,165	$ 663
Property and Equipment, accumulated depreciation	475,832	474,034
Capitalized Software, accumulated amortization	619,875	612,971
Intangible Assets, accumulated amortization	$ 45,923	$ 42,520
Shareholders' Equity:
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	750,000,000	750,000,000
Common stock, shares issued (in shares)	131,329,261	131,177,513
Common stock, shares outstanding (in shares)	131,329,261	131,177,513

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Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues:
Revenues	$ 511,579	$ 469,119
Expenses:
Subadvisory, distribution and other asset management costs	46,768	47,379
Software royalties and other information processing costs	8,471	7,293
Compensation, benefits and other personnel	192,916	173,415
Stock-based compensation	11,059	8,074
Consulting, outsourcing and professional fees	51,976	61,104
Data processing and computer related	37,160	33,340
Facilities, supplies and other costs	18,603	18,792
Amortization	10,386	9,424
Depreciation	8,389	8,531
Total expenses	385,728	367,352
Income from operations	125,851	101,767
Net gain from investments	2,256	744
Interest and dividend income	10,819	8,778
Interest expense	(139)	(141)
Equity in earnings of unconsolidated affiliate	31,643	28,879
Income before income taxes	170,430	140,027
Income taxes	39,030	33,012
Net income	$ 131,400	$ 107,015
Basic earnings per common share (in USD per share)	$ 1.00	$ 0.80
Shares used to compute basic earnings per share (in shares)	131,417	134,020
Diluted earnings per common share (in USD per share)	$ 0.99	$ 0.79
Shares used to compute diluted earnings per share (in shares)	132,745	135,311
Asset management, administration and distribution fees
Revenues:
Revenues	$ 404,366	$ 371,829
Information processing and software servicing fees
Revenues:
Revenues	$ 107,213	$ 97,290

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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 131,400	$ 107,015
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(2,923)	3,067
Unrealized (loss) gain on investments:
Unrealized (losses) gains during the period, net of income taxes of $367 and $(385)	(1,231)	1,287
Reclassification adjustment for (gains) losses realized in net income, net of income taxes of $31 and $(11)	(105)	35
Total other comprehensive (loss) income, net of tax	(4,259)	4,389
Comprehensive income	$ 127,141	$ 111,404

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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Unrealized (losses) gains during period, tax benefit (expense)	$ 367	$ (385)
Reclassification adjustment for (gains) losses realized in net income, tax expense (benefit)	$ 31	$ (11)

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Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Capital In Excess of Par Value	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2022		134,162,000
Beginning balance at Dec. 31, 2022	$ 1,953,824	$ 1,342	$ 1,307,162	$ 694,287	$ (48,967)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	107,015			107,015
Other comprehensive (loss) income	4,389				4,389
Purchase and retirement of common stock (in shares)		(1,361,000)
Purchase and retirement of common stock	(80,332)	$ (14)	(9,004)	(71,314)
Issuance of common stock under employee stock purchase plan (in shares)		24,000
Issuance of common stock under employee stock purchase plan	1,203		1,203
Issuance of common stock under share-based award plans (in shares)		443,000
Issuance of common stock under share-based award plans	20,161	$ 5	20,156
Stock-based compensation	8,074		8,074
Ending balance (in shares) at Mar. 31, 2023		133,268,000
Ending balance at Mar. 31, 2023	$ 2,014,334	$ 1,333	1,327,591	729,988	(44,578)
Beginning balance (in shares) at Dec. 31, 2023	131,177,513	131,178,000
Beginning balance at Dec. 31, 2023	$ 2,131,828	$ 1,312	1,404,962	762,586	(37,032)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	131,400			131,400
Other comprehensive (loss) income	(4,259)				(4,259)
Purchase and retirement of common stock (in shares)		(808,000)
Purchase and retirement of common stock	(56,001)	$ (8)	(5,877)	(50,116)
Issuance of common stock under employee stock purchase plan (in shares)		22,000
Issuance of common stock under employee stock purchase plan	1,196		1,196
Issuance of common stock under share-based award plans (in shares)		937,000
Issuance of common stock under share-based award plans	43,831	$ 9	43,822
Stock-based compensation	$ 11,059		11,059
Ending balance (in shares) at Mar. 31, 2024	131,329,261	131,329,000
Ending balance at Mar. 31, 2024	$ 2,259,054	$ 1,313	$ 1,455,162	$ 843,870	$ (41,291)

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Consolidated Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net income	$ 131,400	$ 107,015
Adjustments to reconcile net income to net cash provided by operating activities (See Note 1)	(19,106)	7,349
Net cash provided by operating activities	112,294	114,364
Cash flows from investing activities:
Additions to property and equipment	(13,072)	(10,640)
Additions to capitalized software	(6,277)	(9,041)
Purchases of marketable securities	(41,650)	(21,777)
Prepayments and maturities of marketable securities	32,116	28,387
Proceeds from fixed asset dispositions	1,180	0
Other investing activities	(9,931)	(3,917)
Net cash used in investing activities	(37,634)	(16,988)
Cash flows from financing activities:
Payment of contingent consideration	0	(904)
Purchase and retirement of common stock	(46,825)	(81,214)
Proceeds from issuance of common stock	45,027	21,364
Payment of dividends	(60,359)	(57,835)
Net cash used in financing activities	(62,157)	(118,589)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(572)	2,561
Net increase (decrease) in cash, cash equivalents and restricted cash	11,931	(18,652)
Cash, cash equivalents and restricted cash, beginning of period	834,998	853,359
Cash, cash equivalents and restricted cash, end of period	$ 846,929	$ 834,707

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Summary of Significant Accounting Policies

3 Months Ended

Mar. 31, 2024

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. 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 and Enhanced Chief Investment Officer (ECIO) 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 March 31, 2024, the results of operations for the three months ended March 31, 2024 and 2023, and cash flows for the three months ended March 31, 2024 and 2023. 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, 2023.

There have been no significant changes in significant accounting policies during the three months ended March 31, 2024 as compared to the significant accounting policies described in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.

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 $4,299 and $5,561 in fees during the three months ended March 31, 2024 and 2023, respectively.

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 $436,130 and $397,838 at March 31, 2024 and December 31, 2023, respectively, invested in SEI-sponsored open-ended money market mutual funds. See Note 5 for information related to the Company's total investments in SEI-sponsored and non-SEI-sponsored money market mutual funds and commercial paper classified as cash equivalents.

Restricted Cash

Restricted cash includes $250 at March 31, 2024 and December 31, 2023 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $51 at March 31, 2024 and December 31, 2023 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 $6,277 and $9,041 of software development costs during the three months ended March 31, 2024 and 2023, respectively, to further develop the SEI Wealth PlatformSM (SWP) and for the development of a new platform for the Investment Managers segment. The Company capitalized $3,795 and $4,734 of software development costs for significant enhancements to SWP during the three months ended March 31, 2024 and 2023, respectively. As of March 31, 2024, the net book value of SWP was $215,474. The net book value includes $3,795 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 $5,916 as of December 31, 2023. SWP has a weighted average remaining life of 8.8 years. Amortization expense for SWP was $6,757 and $6,158 during the three months ended March 31, 2024 and 2023, respectively.

The Company also capitalized $2,482 and $4,307 of software development costs during the three months ended March 31, 2024 and 2023, respectively, related to the development of a new platform for the Investment Managers segment. Capitalized software development costs in-progress associated with this platform were $22,650 and $20,083 as of March 31, 2024 and December 31, 2023, respectively. The platform is not yet ready for use.

Earnings per Share

The calculations of basic and diluted earnings per share for the three months ended March 31, 2024 and 2023 are:

	Three Months Ended March 31,
	2024		2023
Net income	$	131,400	$	107,015
Shares used to compute basic earnings per common share	131,417,000		134,020,000
Dilutive effect of stock options	1,328,000		1,291,000
Shares used to compute diluted earnings per common share	132,745,000		135,311,000
Basic earnings per common share	$	1.00	$	0.80
Diluted earnings per common share	$	0.99	$	0.79

During the three months ended March 31, 2024 and 2023, employee stock options to purchase 10,912,000 and 11,273,000 shares of common stock with an average exercise price of $61.05 and $61.28, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three 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.

New Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (ASU 2023-07) which updates reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. The amendments are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments in ASU 2023-07 apply retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the impact of adopting ASU 2023-07 on its consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures (ASU 2023-09) to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 is effective for annual periods beginning after December 15, 2024 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2023-09 on its consolidated financial statements and related disclosures.

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 three months ended March 31:

	2024		2023
Net income	$	131,400	$	107,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,389		8,531
Amortization	10,386		9,424
Equity in earnings of unconsolidated affiliate	(31,643)		(28,879)
Distributions received from unconsolidated affiliate	33,147		29,219
Stock-based compensation	11,059		8,074
Provision for losses on receivables	502		(180)
Deferred income tax expense	(7,150)		(5,452)
Net (gain) loss from investments	(2,256)		(744)
Change in other long-term liabilities	850		938
Change in other assets	(7,800)		(783)
Contract costs capitalized, net of amortization	221		423
Other	(2,068)		123
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products	280		6,270
Receivables	(60,386)		(962)
Other current assets	1,268		(2,261)
Advances due from unconsolidated affiliate	51,986		49,292
(Decrease) increase in
Accounts payable	(328)		877
Accrued liabilities	(25,471)		(65,998)
Deferred revenue	(92)		(563)
Total adjustments	(19,106)		7,349
Net cash provided by operating activities	$	112,294	$	114,364

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Investment In Unconsolidated Affiliate

3 Months Ended

Mar. 31, 2024

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 March 31, 2024 was 38.6%. 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 March 31, 2024, the Company’s total investment in LSV was $57,291. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $33,147 and $29,219 in the three months ended March 31, 2024 and 2023, 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 $31,643 and $28,879 during the three months ended March 31, 2024 and 2023, respectively.

These tables contain condensed financial information of LSV:

Condensed Statement of Operations	Three Months Ended March 31,
	2024		2023
Revenues	$	107,349	$	98,192
Net income	82,012		74,774

Condensed Balance Sheets	March 31, 2024		December 31, 2023
Current assets	$	127,930	$	169,867
Non-current assets	6,198		6,568
Total assets	$	134,128	$	176,435
Current liabilities	$	36,673	$	74,853
Non-current liabilities	1,955		2,182
Partners’ capital	95,500		99,400
Total liabilities and partners’ capital	$	134,128	$	176,435

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Composition of Certain Financial Statement Captions

3 Months Ended

Mar. 31, 2024

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: 

	March 31, 2024		December 31, 2023
Trade receivables	$	136,599	$	115,356
Fees earned, not billed	408,852		372,291
Other receivables	17,109		14,450
	562,560		502,097
Less: Allowance for doubtful accounts	(1,165)		(663)
	$	561,395	$	501,434

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:

	March 31, 2024		December 31, 2023
Buildings	$	216,968	$	216,968
Equipment	190,071		193,096
Land	26,450		26,450
Purchased software	166,848		165,348
Furniture and fixtures	23,053		23,025
Leasehold improvements	19,857		19,827
Construction in progress	789		684
	644,036		645,398
Less: Accumulated depreciation	(475,832)		(474,034)
Property and Equipment, net	$	168,204	$	171,364

The Company recognized $8,389 and $8,531 in depreciation expense related to property and equipment for the three months ended March 31, 2024 and 2023, respectively.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $40,000 and $40,221 as of March 31, 2024 and December 31, 2023, respectively. The Company deferred expenses related to contract costs of $2,391 and $1,744 during the three months ended March 31, 2024 and 2023, respectively. Amortization expense related to deferred contract costs were $2,612 and $2,167 during the three months ended March 31, 2024 and 2023, respectively. Amortization expense related to deferred contract costs is included in Compensation, benefits and other personnel on the accompanying Consolidated Statements of Operations. There were no material impairment losses in relation to deferred contract costs during the three months ended March 31, 2024.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2024		December 31, 2023
Accrued employee compensation	$	54,872	$	107,495
Accrued employee benefits and other personnel	2,445		9,797
Accrued voluntary separation program	14,657		21,058
Accrued consulting, outsourcing and professional fees	31,780		32,285
Accrued sub-advisory, distribution and other asset management fees	52,169		49,405
Accrued dividend payable	715		61,104
Accrued income taxes	41,032		4,965
Other accrued liabilities	45,186		32,836
Total accrued liabilities	$	242,856	$	318,945

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Fair Value Measurements

3 Months Ended

Mar. 31, 2024

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), and 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 2027 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 three months ended March 31, 2024 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2023. The Company had no Level 3 financial assets at March 31, 2024 or December 31, 2023 that were required to be measured at fair value on a recurring basis. The Company's Level 3 financial liabilities at March 31, 2024 and December 31, 2023 consist entirely of the estimated fair value of the contingent consideration resulting from an acquisition (See Note 12). There were no transfers of financial assets between levels within the fair value hierarchy during the three months ended March 31, 2024.

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	March 31, 2024		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	37,842	$	37,842	$	—
Available-for-sale debt securities	126,185		—		126,185
Fixed-income securities owned	31,958		—		31,958
Investment funds sponsored by LSV (1)	8,149
	$	204,134	$	37,842	$	158,143

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2023		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	36,661	$	36,661	$	—
Available-for-sale debt securities	118,752		—		118,752
Fixed-income securities owned	31,334		—		31,334
Investment funds sponsored by LSV (1)	7,316
	$	194,063	$	36,661	$	150,086

(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

3 Months Ended

Mar. 31, 2024

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 SEI-sponsored and non-SEI-sponsored money market funds and commercial paper classified as cash equivalents had a fair value of $598,118 and $565,588 at March 31, 2024 and December 31, 2023, respectively. There were no material unrealized or realized gains or losses from these investments during the three months ended March 31, 2024 and 2023. 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 March 31, 2024
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	136,848	$	—	$	(10,663)	$	126,185
SEI-sponsored mutual funds	30,956		1,271		(5)		32,222
Equities and other mutual funds	5,335		285		—		5,620
	$	173,139	$	1,556	$	(10,668)	$	164,027

	At December 31, 2023
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	127,681	$	—	$	(8,929)	$	118,752
SEI-sponsored mutual funds	30,427		818		(19)		31,226
Equities and other mutual funds	5,301		134		—		5,435
	$	163,409	$	952	$	(8,948)	$	155,413

Net unrealized losses at March 31, 2024 of available-for-sale debt securities were $8,211 (net of income tax benefit of $2,452). Net unrealized losses at December 31, 2023 of available-for-sale debt securities were $6,875 (net of income tax benefit of $2,054). These unrealized losses are associated with the Company’s investments in mortgage-backed securities issued by GNMA and were caused by interest rate increases (See Note 4). The contractual cash flows of these securities are guaranteed by an agency of the U.S. government. Accordingly, it is expected that the securities would not be settled at a price less than the amortized cost bases of the Company's investments. The Company does not intend to sell the investments and it is not likely that the Company will be required to sell the investments before recovery of their amortized cost bases. These net unrealized losses are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

The following tables provide the scheduled maturities of the Company's available-for-sale debt securities:

	At March 31, 2024
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	5,118		4,661
After 5 years through 10 years	20,836		18,811
After 10 years	110,894		102,713
	$	136,848	$	126,185

	At December 31, 2023
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	5,679		5,035
After 5 years through 10 years	31,162		28,084
After 10 years	90,840		85,633
	$	127,681	$	118,752

There were no material realized gains or losses from available-for-sale debt securities during the three months ended March 31, 2024 and 2023, respectively.

There were gross realized gains of $595 and gross realized losses of $46 from mutual funds and equities during the three months ended March 31, 2024. There were no material realized gains or losses from mutual funds and equities during the three months ended March 31, 2023. Gains and losses from mutual funds and equities are reflected in Net 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 gain from investments on the accompanying Consolidated Statements of Operations.

The funds had a fair value of $8,149 and $7,316 at March 31, 2024 and December 31, 2023, respectively. The Company recognized unrealized gains of $833 and unrealized losses of $171 during the three months ended March 31, 2024 and 2023, 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 $31,958 and $31,334 at March 31, 2024 and December 31, 2023, respectively. There were no material net gains or losses related to the securities during the three months ended March 31, 2024 and 2023.

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Line of Credit

3 Months Ended

Mar. 31, 2024

Line of Credit Facility [Abstract]

Line of Credit

Line of Credit

The Company has a five-year $325,000 Credit Agreement (the Credit Facility) with Wells Fargo Bank, N.A., and a syndicate of other lenders. 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 Adjusted Term Secured Overnight Financing Rate (SOFR) 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 Prime Rate, b) the Federal Funds Rate plus 0.50% and c) the Adjusted Term SOFR for a one-month tenor in effect on such day plus 1.00%.

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 0.20% 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.

The Company was in compliance with all covenants of the Credit Facility during the three months ended March 31, 2024. As of April 11, 2024, the Company had outstanding letters of credit of $4,866 under the Credit Facility. The amount of the Credit Facility that is available for general corporate purposes as of April 11, 2024 was $320,134.

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Shareholders' Equity

3 Months Ended

Mar. 31, 2024

Stockholders' Equity Note [Abstract]

Shareholders' Equity

Shareholders’ Equity

Stock-Based Compensation

The Company has non-qualified stock options and restricted stock units (RSUs) outstanding under its equity compensation plans. The Company recognized stock-based compensation expense in its Consolidated Financial Statements in the three months ended March 31, 2024 and 2023, respectively, as follows: 

	Three Months Ended March 31,
	2024		2023
Stock-based compensation expense	$	11,059	$	8,074
Less: Deferred tax benefit	(2,213)		(1,492)
Stock-based compensation expense, net of tax	$	8,846	$	6,582

The vesting of the Company's RSUs are time-based and are not based on the achievement of performance targets. The majority of the Company's RSUs will vest on the third anniversary of the issuance date. 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 revised its estimate of when some vesting targets are expected to be achieved. This change in management's estimate resulted in an increase of $310 in stock-based compensation expense during the three months ended March 31, 2024.

As of March 31, 2024, there was approximately $115,038 of unrecognized compensation cost remaining related to unvested employee stock options and restricted stock units 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 three months ended March 31, 2024 was $18,831. The total options exercisable as of March 31, 2024 had an intrinsic value of $91,066. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of March 31, 2024 and the weighted average exercise price of the options. The market value of the Company’s common stock as of March 31, 2024 was $71.90 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of March 31, 2024 was $55.78. Total options that were outstanding as of March 31, 2024 were 15,968,000. Total options that were exercisable as of March 31, 2024 were 5,649,000.

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 808,000 shares at a total cost of $56,001 during the three months ended March 31, 2024, which reduced the total shares outstanding of common stock. The cost of stock purchases during the period includes the cost of excise taxes applicable to stock repurchases and certain transactions that settled in the following quarter. As of March 31, 2024, the Company had approximately $226,077 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.

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Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2024

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, 2024	$	(30,157)	$	(6,875)	$	(37,032)
Other comprehensive loss before reclassifications	(2,923)		(1,231)		(4,154)
Amounts reclassified from accumulated other comprehensive loss	—		(105)		(105)
Net current-period other comprehensive loss	(2,923)		(1,336)		(4,259)
Balance, March 31, 2024	$	(33,080)	$	(8,211)	$	(41,291)

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Business Segment Information

3 Months Ended

Mar. 31, 2024

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 Outsourced Chief Investment Officer 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

Investments in New Businesses – Focuses on providing investment management solutions to ultra-high-net-worth families residing in the United States, hosted technology services to family offices and financial institutions; developing network and data protection services; 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 months ended March 31, 2024 and 2023. Assets are not allocated to segments for internal reporting purposes. 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, 2023.

During the three months ended March 31, 2024 and made effective January 1, 2024, the Company made a determination to reorganize some of its business segments based on how its current Chief Operating Decision Maker (CODM) manages its businesses, including with respect to resource allocation and performance assessment. As a result, one of the Company's client relationships formerly reported in the Private Banks segment will be reported in the Investment Managers segment and the Company’s family office services business, formerly reported in the Investment Managers segment, will be reported in the Investments in New Businesses segment. The business segment financial presentation was reclassified in 2024 to conform to this reorganization. Prior year amounts have been reclassified to conform to current year presentation.

The following tables highlight certain financial information about each of the business segments for the three months ended March 31, 2024 and 2023:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended March 31, 2024
Revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579
Expenses	112,974		66,958		40,109		109,550		18,383		347,974
Operating profit (loss)	$	17,163	$	55,760	$	31,669	$	63,103	$	(4,090)	$	163,605

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended March 31, 2023
Revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119
Expenses	112,462		63,546		40,868		101,685		17,639		336,200
Operating profit (loss)	$	8,440	$	42,992	$	33,422	$	52,812	$	(4,747)	$	132,919

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 March 31, 2024 and 2023 is as follows:

	2024		2023
Total operating profit from segments	$	163,605	$	132,919
Corporate overhead expenses	(37,754)		(31,152)
Income from operations	$	125,851	$	101,767

The following tables provide additional information for the three months ended March 31, 2024 and 2023 pertaining to the business segments:

	Capital Expenditures (1)				Depreciation
	2024		2023		2024		2023
Private Banks	$	6,432	$	9,071	$	2,904	$	5,354
Investment Advisors	3,165		4,339		2,181		468
Institutional Investors	1,119		648		604		282
Investment Managers	7,675		4,566		1,579		1,992
Investments in New Businesses	416		382		172		231
Total from business segments	$	18,807	$	19,006	$	7,440	$	8,327
Corporate overhead	542		615		949		204
	$	19,349	$	19,621	$	8,389	$	8,531

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

	Amortization
	2024		2023
Private Banks	$	5,111	$	4,646
Investment Advisors	2,122		1,818
Institutional Investors	1,892		1,824
Investment Managers	—		177
Investments in New Businesses	1,182		895
Total from business segments	$	10,307	$	9,360
Corporate overhead	79		64
	$	10,386	$	9,424

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Income Taxes

3 Months Ended

Mar. 31, 2024

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The gross liability for unrecognized tax benefits at March 31, 2024 and December 31, 2023 was $16,383 and $15,532, respectively, exclusive of interest and penalties, of which $15,849 and $14,878 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 March 31, 2024 and December 31, 2023, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $1,655 and $1,385, respectively.

	March 31, 2024		December 31, 2023
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	16,383	$	15,532
Interest and penalties on unrecognized benefits	1,655		1,385
Total gross uncertain tax positions	$	18,038	$	16,917
Amount included in Current liabilities	$	3,658	$	3,837
Amount included in Other long-term liabilities	14,380		13,080
	$	18,038	$	16,917

The effective income tax rate for the three months ended March 31, 2024 and 2023 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2024		2023
Statutory rate	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.9		2.9
Foreign tax expense and tax rate differential	0.1		(0.1)
Tax benefit from stock option exercises	(1.1)		(0.2)
	22.9	%	23.6	%

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 2020 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2018.

The Company estimates it will recognize $3,658 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.

The Organization for Economic Co-operation and Development (OECD) has a framework to implement a global minimum corporate tax of 15% for companies with global revenues and profits above certain thresholds (referred to as Pillar Two). Certain aspects of Pillar Two are effective January 1, 2024 and other aspects are effective January 1, 2025. While it is uncertain whether the U.S. will enact legislation to adopt Pillar Two, certain countries in which we operate have adopted legislation, and other countries are in the process of introducing legislation to implement Pillar Two. We do not expect Pillar Two to have a material impact on our effective tax rate or our consolidated results of operation, financial position, or cash flows.

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Commitments and Contingencies

3 Months Ended

Mar. 31, 2024

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 recognized on the Consolidated Balance Sheet as of March 31, 2024 and December 31, 2023 related to these indemnifications.

Legal Proceedings

The Company is a party to various disputes, actions and claims 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, if any, 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 upon which these beliefs are based may be incorrect and, if so, 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

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill and Intangible Assets

The changes in the carrying amount of the Company's goodwill by segment are as follows:

	Institutional Investors		Investment Managers		Investments in New Businesses		Total
Balance, December 31, 2023	$	61,884	$	56,990	$	18,459	$	137,333
Reclassification due to segment reorganization	—		(1,711)		1,711		—
Foreign currency translation adjustments	(128)		(1)		—		(129)
Balance, March 31, 2024	$	61,756	$	55,278	$	20,170	$	137,204

The reclassification of the Company's goodwill by segment during the three months ended March 31, 2024 reflects the relative fair value allocation of the goodwill related to the businesses that were reclassified into the new segment (See Note 9).

In November 2023, the Company's wholly-owned operating subsidiary in the United Kingdom, SIEL, acquired all of the outstanding equity of XPS Pensions (Nexus) Limited, principal employer and scheme funder of the National Pensions Trust (NPT), from its parent company, XPS Pensions Group PLC (XPS). The total purchase price for XPS Pensions (Nexus) Limited included a contingent consideration payable to the sellers subject to the achievement of certain post-closing performance measurements determined during intervals occurring within two years immediately following the closing date. As of March 31, 2024, the current portion of the contingent consideration of $915 is included in Accrued liabilities on the accompanying Balance Sheet. The long-term portion of the contingent consideration of $2,618 is included in Other long-term liabilities on the accompanying Balance Sheet.

The Company recognized $3,403 and $3,055 of amortization expense related to acquired intangible assets during the three months ended March 31, 2024 and 2023, respectively.

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Revenues from Contracts with Customers

3 Months Ended

Mar. 31, 2024

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 March 31, 2024 and 2023:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2024
Investment management fees from pooled investment products	$	32,399	$	58,597	$	12,074	$	84	$	356	$	103,510
Investment management fees from investment management agreements	931		48,161		54,209		—		4,308		107,609
Investment operations fees	539		9,644		—		164,189		1,478		175,850
Investment processing fees - PaaS	67,846		1,281		423		1,258		10		70,818
Investment processing fees - SaaS	23,459		—		2,088		19		5,097		30,663
Professional services fees	4,115		—		—		1,017		583		5,715
Account fees and other	848		5,035		2,984		6,086		2,461		17,414
Total revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579
Primary Geographic Markets:
United States	$	85,775	$	122,718	$	59,376	$	155,959	$	14,293	$	438,121
United Kingdom	29,848		—		9,218		—		—		39,066
Canada	9,799		—		1,471		—		—		11,270
Ireland	4,715		—		1,713		9,906		—		16,334
Luxembourg	—		—		—		6,788		—		6,788
Total revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2023
Investment management fees from pooled investment products	$	32,220	$	60,605	$	11,713	$	126	$	338	$	105,002
Investment management fees from investment management agreements	498		40,666		58,028		—		4,217		103,409
Investment operations fees	346		—		—		145,639		1,555		147,540
Investment processing fees - PaaS	60,865		1,254		194		1,044		11		63,368
Investment processing fees - SaaS	22,215		—		2,651		18		4,207		29,091
Professional services fees	3,792		—		—		1,661		349		5,802
Account fees and other	966		4,013		1,704		6,009		2,215		14,907
Total revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119
Primary Geographic Markets:
United States	$	78,469	$	106,538	$	62,218	$	140,083	$	12,892	$	400,200
United Kingdom	27,846		—		9,095		—		—		36,941
Canada	10,090		—		1,369		—		—		11,459
Ireland	4,497		—		1,608		9,025		—		15,130
Luxembourg	—		—		—		5,389		—		5,389
Total revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119

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. Also includes income from client cash balances held in the FDIC-insured accounts through the SEI Integrated Cash program. 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 a monthly fee plus additional fees determined on a per-account or per-transaction basis. Contractual fees can also be stated as 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 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.

Revenues associated with clients of the mutual fund trading solution are fees recognized for shareholder services and related services through the use of the Company's proprietary platform or through third-party vendor agreements. Contractual fees are stated as a percentage of the value of total assets or positions processed on the Company's platform or subject to third-party vendor agreements each month. Fees are billed and collected on a monthly and quarterly basis. These revenues were previously classified under Account fees and other in 2023 and have been reclassified to conform to the current year presentation.

Investment processing fees - Software as a Service - Revenues associated with clients of the Private Banks segment for application software services. Clients 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 associated with clients of the Investments in New Businesses segment processed on the Archway PlatformSM are fees for hosted technology services to family offices and financial institutions. The Archway Platform is an integrated technology platform used for investment, operations, accounting and client reporting by these institutions. The contractual fee is based on a monthly subscription fee to access the Archway Platform along with additional fees on a per transaction basis.

Revenues associated with clients of the Institutional Investors segment processed on the SEI NovusSM portfolio intelligence tool are fees for data management, performance measurement, reporting, and risk analytics. The contractual fee is based on a fixed fee to access SEI Novus and includes fees for integration of historical fund data and custom reporting.

All revenues from investment processing fees 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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Subsequent Event

3 Months Ended

Mar. 31, 2024

Subsequent Events [Abstract]

Subsequent Event

Subsequent Event

The Company is currently in the process of entering into an agreement of sale pending finalization of certain administrative items related to a condominium owned by the Company located in New York, New York. The sale is expected to close during the second quarter 2024 subject to the completion of all terms and conditions of the agreement. If a transaction is finalized, the Company expects to recognize a net pre-tax gain of approximately $8,000 to $8,500 after associated costs and expenses once the sale is finalized.

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Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Pay vs Performance Disclosure
Net income	$ 131,400	$ 107,015

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Insider Trading Arrangements	3 Months Ended
	Mar. 31, 2024
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

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Summary of Significant Accounting Policies (Policies)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Basis of Presentation

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 March 31, 2024, the results of operations for the three months ended March 31, 2024 and 2023, and cash flows for the three months ended March 31, 2024 and 2023. 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, 2023.

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 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).

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.

Cash and Cash Equivalents

Cash and Cash Equivalents

Cash and cash equivalents includes $436,130 and $397,838 at March 31, 2024 and December 31, 2023, respectively, 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 Cash

Restricted cash includes $250 at March 31, 2024 and December 31, 2023 segregated for regulatory purposes related to trade-execution services conducted by SEI Investments (Europe) Limited. Restricted cash also includes $51 at March 31, 2024 and December 31, 2023 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.

New Accounting Pronouncements

New Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures (ASU 2023-07) which updates reportable segment disclosure requirements primarily through enhanced disclosures about significant segment expenses. The amendments are effective for fiscal years beginning after December 15, 2023, and for interim periods within fiscal years beginning after December 15, 2024. Early adoption is permitted. The amendments in ASU 2023-07 apply retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the impact of adopting ASU 2023-07 on its consolidated financial statements and related disclosures.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures (ASU 2023-09) to enhance the transparency and decision usefulness of income tax disclosures. ASU 2023-09 is effective for annual periods beginning after December 15, 2024 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2023-09 on its consolidated financial statements and related disclosures.

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), and 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 2027 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 three months ended March 31, 2024 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2023. The Company had no Level 3 financial assets at March 31, 2024 or December 31, 2023 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 losses are reported as a separate component of Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets.

Securities Owned

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)

3 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Schedule of Calculation of Basic and Diluted Earnings Per Share

The calculations of basic and diluted earnings per share for the three months ended March 31, 2024 and 2023 are:

	Three Months Ended March 31,
	2024		2023
Net income	$	131,400	$	107,015
Shares used to compute basic earnings per common share	131,417,000		134,020,000
Dilutive effect of stock options	1,328,000		1,291,000
Shares used to compute diluted earnings per common share	132,745,000		135,311,000
Basic earnings per common share	$	1.00	$	0.80
Diluted earnings per common share	$	0.99	$	0.79

Schedule of 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 three months ended March 31:

	2024		2023
Net income	$	131,400	$	107,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,389		8,531
Amortization	10,386		9,424
Equity in earnings of unconsolidated affiliate	(31,643)		(28,879)
Distributions received from unconsolidated affiliate	33,147		29,219
Stock-based compensation	11,059		8,074
Provision for losses on receivables	502		(180)
Deferred income tax expense	(7,150)		(5,452)
Net (gain) loss from investments	(2,256)		(744)
Change in other long-term liabilities	850		938
Change in other assets	(7,800)		(783)
Contract costs capitalized, net of amortization	221		423
Other	(2,068)		123
Change in current assets and liabilities
(Increase) decrease in
Receivables from investment products	280		6,270
Receivables	(60,386)		(962)
Other current assets	1,268		(2,261)
Advances due from unconsolidated affiliate	51,986		49,292
(Decrease) increase in
Accounts payable	(328)		877
Accrued liabilities	(25,471)		(65,998)
Deferred revenue	(92)		(563)
Total adjustments	(19,106)		7,349
Net cash provided by operating activities	$	112,294	$	114,364

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Investment In Unconsolidated Affiliate (Tables)

3 Months Ended

Mar. 31, 2024

Equity Method Investments and Joint Ventures [Abstract]

Schedule of Equity Method Investments

These tables contain condensed financial information of LSV:

Condensed Statement of Operations	Three Months Ended March 31,
	2024		2023
Revenues	$	107,349	$	98,192
Net income	82,012		74,774

Condensed Balance Sheets	March 31, 2024		December 31, 2023
Current assets	$	127,930	$	169,867
Non-current assets	6,198		6,568
Total assets	$	134,128	$	176,435
Current liabilities	$	36,673	$	74,853
Non-current liabilities	1,955		2,182
Partners’ capital	95,500		99,400
Total liabilities and partners’ capital	$	134,128	$	176,435

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Composition of Certain Financial Statement Captions (Tables)

3 Months Ended

Mar. 31, 2024

Items Included in Consolidated Statement of Financial Condition [Abstract]

Schedule of Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2024		December 31, 2023
Trade receivables	$	136,599	$	115,356
Fees earned, not billed	408,852		372,291
Other receivables	17,109		14,450
	562,560		502,097
Less: Allowance for doubtful accounts	(1,165)		(663)
	$	561,395	$	501,434

Schedule of Property And Equipment

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

	March 31, 2024		December 31, 2023
Buildings	$	216,968	$	216,968
Equipment	190,071		193,096
Land	26,450		26,450
Purchased software	166,848		165,348
Furniture and fixtures	23,053		23,025
Leasehold improvements	19,857		19,827
Construction in progress	789		684
	644,036		645,398
Less: Accumulated depreciation	(475,832)		(474,034)
Property and Equipment, net	$	168,204	$	171,364

Schedule of Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of: 

	March 31, 2024		December 31, 2023
Accrued employee compensation	$	54,872	$	107,495
Accrued employee benefits and other personnel	2,445		9,797
Accrued voluntary separation program	14,657		21,058
Accrued consulting, outsourcing and professional fees	31,780		32,285
Accrued sub-advisory, distribution and other asset management fees	52,169		49,405
Accrued dividend payable	715		61,104
Accrued income taxes	41,032		4,965
Other accrued liabilities	45,186		32,836
Total accrued liabilities	$	242,856	$	318,945

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2024

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	March 31, 2024		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	37,842	$	37,842	$	—
Available-for-sale debt securities	126,185		—		126,185
Fixed-income securities owned	31,958		—		31,958
Investment funds sponsored by LSV (1)	8,149
	$	204,134	$	37,842	$	158,143

			Fair Value Measurements at the End of the Reporting Period Using
Assets	December 31, 2023		Quoted Prices in Active  Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)
Equity securities	$	36,661	$	36,661	$	—
Available-for-sale debt securities	118,752		—		118,752
Fixed-income securities owned	31,334		—		31,334
Investment funds sponsored by LSV (1)	7,316
	$	194,063	$	36,661	$	150,086

(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)

3 Months Ended

Mar. 31, 2024

Marketable Securities [Abstract]

Schedule of Available For Sale and Equity Securities

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

	At March 31, 2024
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	136,848	$	—	$	(10,663)	$	126,185
SEI-sponsored mutual funds	30,956		1,271		(5)		32,222
Equities and other mutual funds	5,335		285		—		5,620
	$	173,139	$	1,556	$	(10,668)	$	164,027

	At December 31, 2023
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Available-for-sale debt securities	$	127,681	$	—	$	(8,929)	$	118,752
SEI-sponsored mutual funds	30,427		818		(19)		31,226
Equities and other mutual funds	5,301		134		—		5,435
	$	163,409	$	952	$	(8,948)	$	155,413

Schedule of Available-for-Sale Debt Securities by Maturity

The following tables provide the scheduled maturities of the Company's available-for-sale debt securities:

	At March 31, 2024
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	5,118		4,661
After 5 years through 10 years	20,836		18,811
After 10 years	110,894		102,713
	$	136,848	$	126,185

	At December 31, 2023
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	5,679		5,035
After 5 years through 10 years	31,162		28,084
After 10 years	90,840		85,633
	$	127,681	$	118,752

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Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2024

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 months ended March 31, 2024 and 2023, respectively, as follows: 

	Three Months Ended March 31,
	2024		2023
Stock-based compensation expense	$	11,059	$	8,074
Less: Deferred tax benefit	(2,213)		(1,492)
Stock-based compensation expense, net of tax	$	8,846	$	6,582

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Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2024

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, 2024	$	(30,157)	$	(6,875)	$	(37,032)
Other comprehensive loss before reclassifications	(2,923)		(1,231)		(4,154)
Amounts reclassified from accumulated other comprehensive loss	—		(105)		(105)
Net current-period other comprehensive loss	(2,923)		(1,336)		(4,259)
Balance, March 31, 2024	$	(33,080)	$	(8,211)	$	(41,291)

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Business Segment Information (Tables)

3 Months Ended

Mar. 31, 2024

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 March 31, 2024 and 2023:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended March 31, 2024
Revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579
Expenses	112,974		66,958		40,109		109,550		18,383		347,974
Operating profit (loss)	$	17,163	$	55,760	$	31,669	$	63,103	$	(4,090)	$	163,605

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
	For the Three Months Ended March 31, 2023
Revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119
Expenses	112,462		63,546		40,868		101,685		17,639		336,200
Operating profit (loss)	$	8,440	$	42,992	$	33,422	$	52,812	$	(4,747)	$	132,919

Schedule of 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 March 31, 2024 and 2023 is as follows:

	2024		2023
Total operating profit from segments	$	163,605	$	132,919
Corporate overhead expenses	(37,754)		(31,152)
Income from operations	$	125,851	$	101,767

Schedule of Additional Information Pertaining to Business Segments

The following tables provide additional information for the three months ended March 31, 2024 and 2023 pertaining to the business segments:

	Capital Expenditures (1)				Depreciation
	2024		2023		2024		2023
Private Banks	$	6,432	$	9,071	$	2,904	$	5,354
Investment Advisors	3,165		4,339		2,181		468
Institutional Investors	1,119		648		604		282
Investment Managers	7,675		4,566		1,579		1,992
Investments in New Businesses	416		382		172		231
Total from business segments	$	18,807	$	19,006	$	7,440	$	8,327
Corporate overhead	542		615		949		204
	$	19,349	$	19,621	$	8,389	$	8,531

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

	Amortization
	2024		2023
Private Banks	$	5,111	$	4,646
Investment Advisors	2,122		1,818
Institutional Investors	1,892		1,824
Investment Managers	—		177
Investments in New Businesses	1,182		895
Total from business segments	$	10,307	$	9,360
Corporate overhead	79		64
	$	10,386	$	9,424

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Income Taxes (Tables)

3 Months Ended

Mar. 31, 2024

Income Tax Disclosure [Abstract]

Schedule of Interest And Penalties

	March 31, 2024		December 31, 2023
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	16,383	$	15,532
Interest and penalties on unrecognized benefits	1,655		1,385
Total gross uncertain tax positions	$	18,038	$	16,917
Amount included in Current liabilities	$	3,658	$	3,837
Amount included in Other long-term liabilities	14,380		13,080
	$	18,038	$	16,917

Schedule of Effective Income Tax Rate Reconciliation

The effective income tax rate for the three months ended March 31, 2024 and 2023 differs from the federal income tax statutory rate due to the following:

	Three Months Ended March 31,
	2024		2023
Statutory rate	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.9		2.9
Foreign tax expense and tax rate differential	0.1		(0.1)
Tax benefit from stock option exercises	(1.1)		(0.2)
	22.9	%	23.6	%

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Goodwill and Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The changes in the carrying amount of the Company's goodwill by segment are as follows:

	Institutional Investors		Investment Managers		Investments in New Businesses		Total
Balance, December 31, 2023	$	61,884	$	56,990	$	18,459	$	137,333
Reclassification due to segment reorganization	—		(1,711)		1,711		—
Foreign currency translation adjustments	(128)		(1)		—		(129)
Balance, March 31, 2024	$	61,756	$	55,278	$	20,170	$	137,204

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Revenues from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2024

Revenue from Contract with Customer [Abstract]

Schedule of 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 March 31, 2024 and 2023:

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2024
Investment management fees from pooled investment products	$	32,399	$	58,597	$	12,074	$	84	$	356	$	103,510
Investment management fees from investment management agreements	931		48,161		54,209		—		4,308		107,609
Investment operations fees	539		9,644		—		164,189		1,478		175,850
Investment processing fees - PaaS	67,846		1,281		423		1,258		10		70,818
Investment processing fees - SaaS	23,459		—		2,088		19		5,097		30,663
Professional services fees	4,115		—		—		1,017		583		5,715
Account fees and other	848		5,035		2,984		6,086		2,461		17,414
Total revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579
Primary Geographic Markets:
United States	$	85,775	$	122,718	$	59,376	$	155,959	$	14,293	$	438,121
United Kingdom	29,848		—		9,218		—		—		39,066
Canada	9,799		—		1,471		—		—		11,270
Ireland	4,715		—		1,713		9,906		—		16,334
Luxembourg	—		—		—		6,788		—		6,788
Total revenues	$	130,137	$	122,718	$	71,778	$	172,653	$	14,293	$	511,579

	Private Banks		Investment Advisors		Institutional Investors		Investment Managers		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended March 31, 2023
Investment management fees from pooled investment products	$	32,220	$	60,605	$	11,713	$	126	$	338	$	105,002
Investment management fees from investment management agreements	498		40,666		58,028		—		4,217		103,409
Investment operations fees	346		—		—		145,639		1,555		147,540
Investment processing fees - PaaS	60,865		1,254		194		1,044		11		63,368
Investment processing fees - SaaS	22,215		—		2,651		18		4,207		29,091
Professional services fees	3,792		—		—		1,661		349		5,802
Account fees and other	966		4,013		1,704		6,009		2,215		14,907
Total revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119
Primary Geographic Markets:
United States	$	78,469	$	106,538	$	62,218	$	140,083	$	12,892	$	400,200
United Kingdom	27,846		—		9,095		—		—		36,941
Canada	10,090		—		1,369		—		—		11,459
Ireland	4,497		—		1,608		9,025		—		15,130
Luxembourg	—		—		—		5,389		—		5,389
Total revenues	$	120,902	$	106,538	$	74,290	$	154,497	$	12,892	$	469,119

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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Summary of Significant Accounting Policies [Line Items]
Cash and cash equivalents invested in SEI-sponsored money market funds	$ 846,628		$ 834,697
Restricted cash	301		301
Capitalized software development costs	6,277	$ 9,041
Net book value of capitalized software	$ 239,156		239,783
Anti-dilutive employee stock options (in shares)	10,912	11,273
Anti-dilutive employee stock options (in USD per share)	$ 61.05	$ 61.28
Investment Managers
Summary of Significant Accounting Policies [Line Items]
Capitalized software development costs	$ 2,482	$ 4,307
Capitalized software in progress	22,650		20,083
SEI Wealth Platform
Summary of Significant Accounting Policies [Line Items]
Capitalized software development costs	3,795	4,734
Net book value of capitalized software	215,474
Capitalized software in progress	3,795		5,916
Amortization expense related to the SEI Wealth Platform	$ 6,757	6,158
SEI Wealth Platform | Weighted Average
Summary of Significant Accounting Policies [Line Items]
Estimated useful life of the SEI Wealth Platform	8 years 9 months 18 days
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	$ 436,130		397,838
SEI Investments (Europe) Limited
Summary of Significant Accounting Policies [Line Items]
Restricted cash	250		250
SEI Investments Distribution Co. (SIDCO)
Summary of Significant Accounting Policies [Line Items]
Restricted cash	51		$ 51
SEI-Sponsored Open-Ended Money Market Mutual Funds
Summary of Significant Accounting Policies [Line Items]
Fees waived	$ 4,299	$ 5,561

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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
	Mar. 31, 2024	Mar. 31, 2023
Accounting Policies [Abstract]
Net income	$ 131,400	$ 107,015
Shares used to compute basic earnings per common share (in shares)	131,417	134,020
Dilutive effect of stock options (in shares)	1,328	1,291
Shares used to compute diluted earnings per common share (in shares)	132,745	135,311
Basic earnings per common share (in USD per share)	$ 1.00	$ 0.80
Diluted earnings per common share (in USD per share)	$ 0.99	$ 0.79

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Summary of Significant Accounting Policies (Net Cash Provided by Operating Activities) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accounting Policies [Abstract]
Net income	$ 131,400	$ 107,015
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	8,389	8,531
Amortization	10,386	9,424
Equity in earnings of unconsolidated affiliate	(31,643)	(28,879)
Distributions received from unconsolidated affiliate	33,147	29,219
Stock-based compensation	11,059	8,074
Provision for losses on receivables	502	(180)
Deferred income tax expense	(7,150)	(5,452)
Net (gain) loss from investments	(2,256)	(744)
Change in other long-term liabilities	850	938
Change in other assets	(7,800)	(783)
Contract costs capitalized, net of amortization	221	423
Other	(2,068)	123
Change in current assets and liabilities (Increase) decrease in
Receivables from investment products	280	6,270
Receivables	(60,386)	(962)
Other current assets	1,268	(2,261)
Advances due from unconsolidated affiliate	51,986	49,292
(Decrease) increase in
Accounts payable	(328)	877
Accrued liabilities	(25,471)	(65,998)
Deferred revenue	(92)	(563)
Total adjustments	(19,106)	7,349
Net cash provided by operating activities	$ 112,294	$ 114,364

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Investment In Unconsolidated Affiliate (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Total investment in LSV	$ 57,291
Distributions received from LSV	33,147	$ 29,219
Company's share in the earnings of LSV	$ 31,643	$ 28,879
L S V Asset Management
Schedule of Equity Method Investments [Line Items]
Ownership interest in LSV	38.60%

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Investment In Unconsolidated Affiliate (Condensed Statements of Operations of LSV) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Schedule of Equity Method Investments [Line Items]
Revenues	$ 511,579	$ 469,119
Equity Method Investment, Nonconsolidated Investee
Schedule of Equity Method Investments [Line Items]
Revenues	107,349	98,192
Net income	$ 82,012	$ 74,774

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Investment in Unconsolidated Affiliate (Condensed Balance Sheets of LSV) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Current assets	$ 1,555,024	$ 1,478,116
Total Assets	2,568,437	2,520,003
Current liabilities	275,982	353,047
Total Liabilities and Shareholders' Equity	2,568,437	2,520,003
Equity Method Investment, Nonconsolidated Investee
Schedule of Equity Method Investments [Line Items]
Current assets	127,930	169,867
Non-current assets	6,198	6,568
Total Assets	134,128	176,435
Current liabilities	36,673	74,853
Non-current liabilities	1,955	2,182
Partners’ capital	95,500	99,400
Total Liabilities and Shareholders' Equity	$ 134,128	$ 176,435

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Composition of Certain Financial Statement Captions (Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Items Included in Consolidated Statement of Financial Condition [Abstract]
Trade receivables	$ 136,599	$ 115,356
Fees earned, not billed	408,852	372,291
Other receivables	17,109	14,450
Gross receivables	562,560	502,097
Less: Allowance for doubtful accounts	(1,165)	(663)
Receivables, net	$ 561,395	$ 501,434

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Composition of Certain Financial Statement Captions (Property And Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Property and Equipment [Line Items]
Property and equipment, gross	$ 644,036		$ 645,398
Less: Accumulated depreciation	(475,832)		(474,034)
Property and Equipment, net	168,204		171,364
Depreciation expense	8,389	$ 8,531
Buildings
Property and Equipment [Line Items]
Property and equipment, gross	216,968		216,968
Equipment
Property and Equipment [Line Items]
Property and equipment, gross	190,071		193,096
Land
Property and Equipment [Line Items]
Property and equipment, gross	26,450		26,450
Purchased software
Property and Equipment [Line Items]
Property and equipment, gross	166,848		165,348
Furniture and fixtures
Property and Equipment [Line Items]
Property and equipment, gross	23,053		23,025
Leasehold improvements
Property and Equipment [Line Items]
Property and equipment, gross	19,857		19,827
Construction in progress
Property and Equipment [Line Items]
Property and equipment, gross	$ 789		$ 684

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Composition of Certain Financial Statement Captions (Deferred Contract Costs) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Items Included in Consolidated Statement of Financial Condition [Abstract]
Deferred contract costs	$ 40,000,000		$ 40,221,000
Capitalized contract cost, amount capitalized during period	2,391,000	$ 1,744,000
Amortization of deferred contract costs	2,612,000	$ 2,167,000
Capitalized contract cost impairment	$ 0

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Composition of Certain Financial Statement Captions (Accrued Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Items Included in Consolidated Statement of Financial Condition [Abstract]
Accrued employee compensation	$ 54,872	$ 107,495
Accrued employee benefits and other personnel	2,445	9,797
Accrued voluntary separation program	14,657	21,058
Accrued consulting, outsourcing and professional fees	31,780	32,285
Accrued sub-advisory, distribution and other asset management fees	52,169	49,405
Accrued dividend payable	715	61,104
Accrued income taxes	41,032	4,965
Other accrued liabilities	45,186	32,836
Total accrued liabilities	$ 242,856	$ 318,945

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Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	$ 126,185	$ 118,752
Fixed-income securities owned	31,958	31,334
Assets, fair value	204,134	194,063
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	37,842	36,661
Significant Other Observable Inputs (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-income securities owned	31,958	31,334
Assets, fair value	158,143	150,086
Equity securities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale securities	37,842	36,661
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	37,842	36,661
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	126,185	118,752
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	126,185	118,752
Investment Funds sponsored by LSV
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment funds sponsored by LSV	$ 8,149	$ 7,316

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Marketable Securities (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Schedule of Investments [Line Items]
Cash equivalents at fair value	$ 598,118		$ 565,588
Net unrealized gains (loss)	(8,211)		(6,875)
Net unrealized gains (losses) income tax expense (benefit)	(2,452)		(2,054)
Mutual funds and equities, gross realized gains	595
Mutual funds and equities, gross realized loss	46
Other long-term investments	57,291		110,781
Securities owned	31,958		31,334
Investment Funds Sponsored by LSV
Schedule of Investments [Line Items]
Other long-term investments	8,149		$ 7,316
Unrealized gains (losses) on investments	$ 833	$ (171)

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Marketable Securities (Available for Sale and Equity Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, cost	$ 136,848	$ 127,681
Available for sale debt securities, fair value	126,185	118,752
Available for sale and equity securities, cost	173,139	163,409
Available for sale and equity securities, gross unrealized gains	1,556	952
Available for sale and equity securities, gross unrealized (losses)	(10,668)	(8,948)
Available for sale and equity securities, fair value	164,027	155,413
Available-for-sale debt securities
Debt Securities, Available-for-sale [Line Items]
Available for sale debt securities, cost	136,848	127,681
Available for sale debt securities, gross unrealized gains	0	0
Available for sale debt securities, gross unrealized (losses)	(10,663)	(8,929)
Available for sale debt securities, fair value	126,185	118,752
SEI-sponsored mutual funds
Debt Securities, Available-for-sale [Line Items]
Equity securities, FV-NI, cost	30,956	30,427
Equity securities, FV-NI, gross unrealized gains	1,271	818
Equity securities, FV-NI, gross unrealized (losses)	(5)	(19)
Equity securities, FV-NI, fair value	32,222	31,226
Equities and other mutual funds
Debt Securities, Available-for-sale [Line Items]
Equity securities, FV-NI, cost	5,335	5,301
Equity securities, FV-NI, gross unrealized gains	285	134
Equity securities, FV-NI, gross unrealized (losses)	0	0
Equity securities, FV-NI, fair value	$ 5,620	$ 5,435

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Marketable Securities (Schedule of Available-for-Sale Debt Securities by Maturity) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Cost
Within one year	$ 0	$ 0
After one year through five years	5,118	5,679
After 5 years through 10 years	20,836	31,162
After 10 years	110,894	90,840
Available for sale debt securities, cost	136,848	127,681
Fair Value
Within one year	0	0
After one year through five years	4,661	5,035
After 5 years through 10 years	18,811	28,084
After 10 years	102,713	85,633
Available for sale debt securities, Fair Value	$ 126,185	$ 118,752

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Line of Credit (Details) - 2021 Credit Facility	3 Months Ended
	Mar. 31, 2024 USD ($) fiscalQuarter	Apr. 11, 2024 USD ($)
Line of Credit Facility [Line Items]
Debt interest rate accrual term, number of preceding fiscal quarters | fiscalQuarter	4
Subsequent Event
Line of Credit Facility [Line Items]
Letters of credit outstanding amount		$ 4,866,000
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 accordion feature, increase limit	$ 100,000,000
Line of Credit | Subsequent Event
Line of Credit Facility [Line Items]
Credit facility remaining borrowing capacity		$ 320,134,000
Line of Credit | 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 | 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 | 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 (Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Stockholders' Equity Note [Abstract]
Stock-based compensation expense	$ 11,059	$ 8,074
Less: Deferred tax benefit	(2,213)	(1,492)
Stock-based compensation expense, net of tax	$ 8,846	$ 6,582

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Shareholders' Equity (Narrative) (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Increase (decrease) in stock-based compensation from change in management's estimate	$ 310
Unrecognized compensation cost	115,038
Total intrinsic value of options exercised	18,831
Aggregate intrinsic value of options exercisable	$ 91,066
Market value of Company's common stock (in USD per share) | $ / shares	$ 71.90
Weighted average exercise price per share (in USD per share) | $ / shares	$ 55.78
Total options outstanding (in shares) | shares	15,968
Total options exercisable (in shares) | shares	5,649
Common Stock Buyback
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares purchased and retired (in shares) | shares	808
Company purchased, cost	$ 56,001
Remaining stock repurchase authorization amount	$ 226,077
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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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 2,131,828	$ 1,953,824
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications	(4,154)
Amounts reclassified from accumulated other comprehensive loss	(105)
Total other comprehensive (loss) income, net of tax	(4,259)	4,389
Ending balance	2,259,054	2,014,334
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(37,032)	(48,967)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Total other comprehensive (loss) income, net of tax	(4,259)	4,389
Ending balance	(41,291)	$ (44,578)
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(30,157)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications	(2,923)
Amounts reclassified from accumulated other comprehensive loss	0
Total other comprehensive (loss) income, net of tax	(2,923)
Ending balance	(33,080)
Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(6,875)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax [Abstract]
Other comprehensive loss before reclassifications	(1,231)
Amounts reclassified from accumulated other comprehensive loss	(105)
Total other comprehensive (loss) income, net of tax	(1,336)
Ending balance	$ (8,211)

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Business Segment Information (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 511,579,000	$ 469,119,000
Intersegment
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0

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Business Segment Information (Schedule of Financial Information About Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 511,579	$ 469,119
Expenses	347,974	336,200
Operating profit (loss)	163,605	132,919
Private Banks
Segment Reporting Information [Line Items]
Revenues	130,137	120,902
Expenses	112,974	112,462
Operating profit (loss)	17,163	8,440
Investment Advisors
Segment Reporting Information [Line Items]
Revenues	122,718	106,538
Expenses	66,958	63,546
Operating profit (loss)	55,760	42,992
Institutional Investors
Segment Reporting Information [Line Items]
Revenues	71,778	74,290
Expenses	40,109	40,868
Operating profit (loss)	31,669	33,422
Investment Managers
Segment Reporting Information [Line Items]
Revenues	172,653	154,497
Expenses	109,550	101,685
Operating profit (loss)	63,103	52,812
Investments In New Businesses
Segment Reporting Information [Line Items]
Revenues	14,293	12,892
Expenses	18,383	17,639
Operating profit (loss)	$ (4,090)	$ (4,747)

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Business Segment Information (Reconciliation of Total Operating Profit) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting [Abstract]
Total operating profit from segments	$ 163,605	$ 132,919
Corporate overhead expenses	(37,754)	(31,152)
Income from operations	$ 125,851	$ 101,767

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Business Segment Information (Schedule Of Additional Information Pertaining To Business Segments) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Capital expenditure	$ 19,349	$ 19,621
Depreciation	8,389	8,531
Amortization	10,386	9,424
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditure	18,807	19,006
Depreciation	7,440	8,327
Amortization	10,307	9,360
Operating Segments | Private Banks
Segment Reporting Information [Line Items]
Capital expenditure	6,432	9,071
Depreciation	2,904	5,354
Amortization	5,111	4,646
Operating Segments | Investment Advisors
Segment Reporting Information [Line Items]
Capital expenditure	3,165	4,339
Depreciation	2,181	468
Amortization	2,122	1,818
Operating Segments | Institutional Investors
Segment Reporting Information [Line Items]
Capital expenditure	1,119	648
Depreciation	604	282
Amortization	1,892	1,824
Operating Segments | Investment Managers
Segment Reporting Information [Line Items]
Capital expenditure	7,675	4,566
Depreciation	1,579	1,992
Amortization	0	177
Operating Segments | Investments In New Businesses
Segment Reporting Information [Line Items]
Capital expenditure	416	382
Depreciation	172	231
Amortization	1,182	895
Corporate overhead
Segment Reporting Information [Line Items]
Capital expenditure	542	615
Depreciation	949	204
Amortization	$ 79	$ 64

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Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Income Tax Contingency [Line Items]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 16,383	$ 15,532
Unrecognized tax benefits that would affect effective tax rate	15,849	14,878
Interest and penalties on unrecognized benefits	1,655	$ 1,385
Settlement and Lapse of Statute
Income Tax Contingency [Line Items]
Unrecognized tax benefits within the next twelve months	$ 3,658

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Income Taxes (Interest And Penalties) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$ 16,383	$ 15,532
Interest and penalties on unrecognized benefits	1,655	1,385
Total gross uncertain tax positions	18,038	16,917
Amount included in Current liabilities	3,658	3,837
Amount included in Other long-term liabilities	14,380	13,080
Total gross uncertain tax positions	$ 18,038	$ 16,917

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Income Taxes (Effective Income Tax Rate Reconciliation) (Details)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Statutory rate	21.00%	21.00%
State taxes, net of federal tax benefit	2.90%	2.90%
Foreign tax expense and tax rate differential	0.10%	(0.10%)
Tax benefit from stock option exercises	(1.10%)	(0.20%)
Effective income tax rate	22.90%	23.60%

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Goodwill and Intangible Assets (Schedule of Goodwill) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 137,333
Reclassification due to segment reorganization	0
Foreign currency translation adjustments	(129)
Goodwill, ending balance	137,204
Institutional Investors
Goodwill [Roll Forward]
Goodwill, beginning balance	61,884
Reclassification due to segment reorganization	0
Foreign currency translation adjustments	(128)
Goodwill, ending balance	61,756
Investment Managers
Goodwill [Roll Forward]
Goodwill, beginning balance	56,990
Reclassification due to segment reorganization	(1,711)
Foreign currency translation adjustments	(1)
Goodwill, ending balance	55,278
Investments In New Businesses
Goodwill [Roll Forward]
Goodwill, beginning balance	18,459
Reclassification due to segment reorganization	1,711
Foreign currency translation adjustments	0
Goodwill, ending balance	$ 20,170

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Goodwill and Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Nov. 30, 2023	Mar. 31, 2024	Mar. 31, 2023
Business Acquisition [Line Items]
Amortization expense		$ 3,403	$ 3,055
XPS Pensions (Nexus) Limited
Business Acquisition [Line Items]
Contingent consideration, earning period	2 years
Contingent consideration, current	$ 915
Contingent consideration, long-term	$ 2,618

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Revenues from Contracts with Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenues	$ 511,579	$ 469,119
United States
Disaggregation of Revenue [Line Items]
Revenues	438,121	400,200
United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	39,066	36,941
Canada
Disaggregation of Revenue [Line Items]
Revenues	11,270	11,459
Ireland
Disaggregation of Revenue [Line Items]
Revenues	16,334	15,130
Luxembourg
Disaggregation of Revenue [Line Items]
Revenues	6,788	5,389
Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	103,510	105,002
Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	107,609	103,409
Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	175,850	147,540
Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	70,818	63,368
Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	30,663	29,091
Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	5,715	5,802
Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	17,414	14,907
Private Banks
Disaggregation of Revenue [Line Items]
Revenues	130,137	120,902
Private Banks | United States
Disaggregation of Revenue [Line Items]
Revenues	85,775	78,469
Private Banks | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	29,848	27,846
Private Banks | Canada
Disaggregation of Revenue [Line Items]
Revenues	9,799	10,090
Private Banks | Ireland
Disaggregation of Revenue [Line Items]
Revenues	4,715	4,497
Private Banks | Luxembourg
Disaggregation of Revenue [Line Items]
Revenues	0	0
Private Banks | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	32,399	32,220
Private Banks | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	931	498
Private Banks | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	539	346
Private Banks | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	67,846	60,865
Private Banks | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	23,459	22,215
Private Banks | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	4,115	3,792
Private Banks | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	848	966
Investment Advisors
Disaggregation of Revenue [Line Items]
Revenues	122,718	106,538
Investment Advisors | United States
Disaggregation of Revenue [Line Items]
Revenues	122,718	106,538
Investment Advisors | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Advisors | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Advisors | Ireland
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Advisors | Luxembourg
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Advisors | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	58,597	60,605
Investment Advisors | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	48,161	40,666
Investment Advisors | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	9,644	0
Investment Advisors | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	1,281	1,254
Investment Advisors | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Advisors | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Advisors | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	5,035	4,013
Institutional Investors
Disaggregation of Revenue [Line Items]
Revenues	71,778	74,290
Institutional Investors | United States
Disaggregation of Revenue [Line Items]
Revenues	59,376	62,218
Institutional Investors | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	9,218	9,095
Institutional Investors | Canada
Disaggregation of Revenue [Line Items]
Revenues	1,471	1,369
Institutional Investors | Ireland
Disaggregation of Revenue [Line Items]
Revenues	1,713	1,608
Institutional Investors | Luxembourg
Disaggregation of Revenue [Line Items]
Revenues	0	0
Institutional Investors | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	12,074	11,713
Institutional Investors | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	54,209	58,028
Institutional Investors | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	0	0
Institutional Investors | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	423	194
Institutional Investors | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	2,088	2,651
Institutional Investors | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	0	0
Institutional Investors | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	2,984	1,704
Investment Managers
Disaggregation of Revenue [Line Items]
Revenues	172,653	154,497
Investment Managers | United States
Disaggregation of Revenue [Line Items]
Revenues	155,959	140,083
Investment Managers | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Managers | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Managers | Ireland
Disaggregation of Revenue [Line Items]
Revenues	9,906	9,025
Investment Managers | Luxembourg
Disaggregation of Revenue [Line Items]
Revenues	6,788	5,389
Investment Managers | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	84	126
Investment Managers | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investment Managers | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	164,189	145,639
Investment Managers | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	1,258	1,044
Investment Managers | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	19	18
Investment Managers | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	1,017	1,661
Investment Managers | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	6,086	6,009
Investments In New Businesses
Disaggregation of Revenue [Line Items]
Revenues	14,293	12,892
Investments In New Businesses | United States
Disaggregation of Revenue [Line Items]
Revenues	14,293	12,892
Investments In New Businesses | United Kingdom
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investments In New Businesses | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investments In New Businesses | Ireland
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investments In New Businesses | Luxembourg
Disaggregation of Revenue [Line Items]
Revenues	0	0
Investments In New Businesses | Investment management fees from pooled investment products
Disaggregation of Revenue [Line Items]
Revenues	356	338
Investments In New Businesses | Investment management fees from investment management agreements
Disaggregation of Revenue [Line Items]
Revenues	4,308	4,217
Investments In New Businesses | Investment operations fees
Disaggregation of Revenue [Line Items]
Revenues	1,478	1,555
Investments In New Businesses | Investment processing fees - PaaS
Disaggregation of Revenue [Line Items]
Revenues	10	11
Investments In New Businesses | Investment processing fees - SaaS
Disaggregation of Revenue [Line Items]
Revenues	5,097	4,207
Investments In New Businesses | Professional services fees
Disaggregation of Revenue [Line Items]
Revenues	583	349
Investments In New Businesses | Account fees and other
Disaggregation of Revenue [Line Items]
Revenues	$ 2,461	$ 2,215

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Subsequent Events (Details) - Subsequent Event - Forecast $ in Thousands	3 Months Ended
	Jun. 30, 2024 USD ($)
Minimum
Subsequent Event [Line Items]
Net gain from sale of condominium	$ 8,000
Maximum
Subsequent Event [Line Items]
Net gain from sale of condominium	$ 8,500