10-Q - SEI INVESTMENTS CO (0000350894) (Filer)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

________________________________________

FORM 10-Q

________________________________________


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

For the quarterly period ended September 30, 2026


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

For the transition period from_________to ________

Commission File Number: 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

Accelerated filer

☐

Non-accelerated filer

☐

Smaller reporting company

☐

Emerging growth company

☐

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

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

The number of shares outstanding of the registrant’s common stock, as of the close of business on October 20, 2026:


Common Stock, $0.01 par value						118,587,861

SEI INVESTMENTS COMPANY

TABLE OF CONTENTS

PART I - FINANCIAL INFORMATION

Page

Item 1.

Financial Statements.

Consolidated Balance Sheets (Unaudited) -- September 30, 2026 and December 31, 2025

Consolidated Statements of Operations (Unaudited) -- For the Three and Nine Months Ended September 30, 2026 and 2025

Consolidated Statements of Comprehensive Income (Unaudited) -- For the Three and Nine Months Ended September 30, 2026 and 2025

Consolidated Statements of Changes in Equity (Unaudited) -- For the Three and Nine Months Ended September 30, 2026 and 2025

Consolidated Condensed Statements of Cash Flows (Unaudited) -- For the Nine Months Ended September 30, 2026 and 2025

Notes to Consolidated Financial Statements

Item 2.

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

Item 3.

Quantitative and Qualitative Disclosures About Market Risk.

Item 4.

Controls and Procedures.

PART II - OTHER INFORMATION

Item 1.

Legal Proceedings.

Item 1A.

Risk Factors.

Item 2.

Unregistered Sales of Equity Securities and Use of Proceeds.

Item 5.

Other Information

Item 6.

Exhibits.

Signatures

PART I – FINANCIAL INFORMATION

Item 1. Financial Statements.


Consolidated Balance Sheets									SEI Investments Company
(unaudited)									and Subsidiaries
(Dollars in thousands, except per-share data)


	September 30, 2026		December 31, 2025
Assets
Current Assets:
Cash and cash equivalents	$	399,766	$	399,804
Receivables from investment products	59,278		63,317
Receivables, net of allowance for doubtful accounts of $2,398 and $1,916	851,279		709,748
Securities owned	25,750		33,777

Other current assets	75,611		66,691
Total Current Assets	1,411,684		1,273,337
Property and Equipment, net of accumulated depreciation of $487,903 and $468,700	153,496		150,434
Operating Lease Right-of-Use Assets	30,186		26,447
Capitalized Software, net of accumulated amortization of $697,165 and $669,896	224,189		234,272
Investments	335,895		428,004
Assets of Consolidated Variable Interest Entities	223,785		183,994
Goodwill	392,205		354,989
Intangible Assets, net of accumulated amortization of $78,925 and $49,534	481,727		368,272
Deferred Contract Costs	58,954		53,345
Deferred Income Taxes	9,178		8,048
Deposits Related to Acquisitions	33,005		118,606

Other Assets, net	80,335		60,096
Total Assets	$	3,434,639	$	3,259,844

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


Consolidated Balance Sheets									SEI Investments Company
(unaudited)									and Subsidiaries
(Dollars in thousands, except per-share data)


	September 30, 2026		December 31, 2025
Liabilities, Redeemable Non-controlling Interests and Equity
Current Liabilities:
Accounts payable	$	13,905	$	5,404
Accrued liabilities	284,920		359,823
Current portion of long-term debt	5,754		—
Current portion of long-term operating lease liabilities	9,124		8,677
Deferred revenue	13,648		13,307
Total Current Liabilities	327,351		387,211
Long-term Debt	30,951		—

Liabilities of Consolidated Variable Interest Entities	136,536		108,504

Deferred Income Taxes	14,206		16,842
Long-term Operating Lease Liabilities	23,474		19,885
Other Long-term Liabilities	24,823		23,626
Total Liabilities	557,341		556,068
Commitments and Contingencies
Redeemable Non-controlling Interests	323,105		243,959
Equity:
Shareholders' Equity:
Common stock, $0.01 par value, 750,000,000 shares authorized; 118,942,181 and 122,232,251 shares issued and outstanding	1,189		1,222
Capital in excess of par value	1,758,970		1,678,787
Retained earnings	785,633		792,280
Accumulated other comprehensive loss, net	(33,229)		(24,505)
Total SEI Shareholders' Equity	2,512,563		2,447,784
Non-controlling interests	41,630		12,033
Total Equity	2,554,193		2,459,817
Total Liabilities, Redeemable Non-controlling Interests and Equity	$	3,434,639	$	3,259,844

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



Consolidated Statements of Operations			SEI Investments Company
(unaudited)			and Subsidiaries
(Dollars in thousands, except per-share data)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Revenues:
Asset management, administration and distribution fees	$	531,417	$	461,964	$	1,542,883	$	1,331,650
Information processing and software servicing fees	130,626		116,547		382,960		357,806
Total revenues	662,043		578,511		1,925,843		1,689,456
Expenses:
Subadvisory, distribution and other asset management costs	61,194		55,072		177,920		152,313
Software royalties and other information processing costs	9,878		9,434		29,487		27,706
Compensation, benefits and other personnel	220,069		203,739		634,223		594,097
Stock-based compensation	16,000		13,956		46,809		41,985
Consulting, outsourcing and professional fees	58,394		54,401		169,066		167,344
Data processing and computer related	49,388		41,569		141,123		122,689
Facilities, supplies and other costs	22,318		20,982		64,093		61,481
Amortization	19,684		11,912		57,175		33,071
Depreciation	7,119		7,485		21,446		23,077
Total expenses	464,044		418,550		1,341,342		1,223,763
Income from operations	197,999		159,961		584,501		465,693
Net gain from investments	1,206		1,992		4,387		4,244
Interest and dividend income	6,866		10,207		21,040		29,711
Interest expense	(606)		(109)		(1,641)		(386)
Gain on sale of business	—		—		—		94,412
Other (expense) income	(32,500)		4,922		(32,050)		9,422
Equity in earnings of unconsolidated affiliates	39,819		31,903		110,989		94,290
Net gain from consolidated variable interest entities	1,809		1,845		11,363		1,845
Income before income taxes	214,593		210,721		698,589		699,231
Income taxes	43,346		46,135		151,015		156,045
Net income	171,247		164,586		547,574		543,186
Less: Net income attributable to non-controlling interests	2,989		382		9,171		382
Net income attributable to SEI Investments Company	$	168,258	$	164,204	$	538,403	$	542,804

Basic earnings per common share	$	1.42	$	1.33	$	4.48	$	4.35
Shares used to compute basic earnings per share	118,415		123,099		120,138		124,710
Diluted earnings per common share	$	1.38	$	1.30	$	4.37	$	4.25
Shares used to compute diluted earnings per share	122,012		126,325		123,280		127,684
Dividends declared per common share	$	—	$	—	$	0.52	$	0.49

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


Consolidated Statements of Comprehensive Income						SEI Investments Company
(unaudited)						and Subsidiaries
(Dollars in thousands)


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Net income	$	171,247	$	164,586	$	547,574	$	543,186
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	185		(3,855)		(3,309)		18,038
Unrealized (loss) gain on investments:
Unrealized (losses) gains during the period, net of income taxes of $1,078, $(276), $1,357 and $(1,410)	(3,572)		924		(4,505)		4,731
Reclassification adjustment for gains realized in net income, net of income taxes of $58, $18, $260 and $49	(226)		(64)		(910)		(172)
Total other comprehensive (loss) income, net of tax	(3,613)		(2,995)		(8,724)		22,597
Comprehensive income	$	167,634	$	161,591	$	538,850	$	565,783
Less: Comprehensive income attributable to the non-controlling interests	2,989		382		9,171		382
Comprehensive income attributable to SEI Investments Company	$	164,645	$	161,209	$	529,679	$	565,401

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


Consolidated Statements of Changes in Equity						SEI Investments Company
(unaudited)						and Subsidiaries
(Dollars in thousands, except per-share data)


	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Non-controlling Interests		Total Equity
	For the Three Months Ended September 30, 2026
Balance, July 1, 2026	119,977	$	1,200	$	1,714,294	$	813,820	$	(29,616)	$	36,174	$	2,535,872
Net income	—	—		—		168,258		—		728		168,986
Other comprehensive loss	—	—		—		—		(3,613)		—		(3,613)
Purchase and retirement of common stock	(2,043)	(20)		(18,628)		(196,445)		—		—		(215,093)
Issuance of common stock under employee stock purchase plan	15	—		1,241		—		—		—		1,241
Issuance of common stock under share-based award plans	993	9		56,011		—		—		—		56,020
Stock-based compensation	—	—		16,000		—		—		—		16,000

Acquired non-controlling interest	—	—		—		—		—		5,190		5,190
Redemption value remeasurement	—	—		(9,948)		—		—		—		(9,948)
Capital distributions	—	—		—		—		—		(462)		(462)
Balance, September 30, 2026	118,942	$	1,189	$	1,758,970	$	785,633	$	(33,229)	$	41,630	$	2,554,193


	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Non-controlling Interests		Total Equity
	For the Three Months Ended September 30, 2025
Balance, July 1, 2025	123,697	$	1,236	$	1,619,133	$	739,453	$	(21,383)	$	—	$	2,338,439
Net income	—	—		—		164,204		—		—		164,204
Other comprehensive loss	—	—		—		—		(2,995)		—		(2,995)
Purchase and retirement of common stock	(1,572)	(15)		(12,775)		(128,765)		—		—		(141,555)
Issuance of common stock under employee stock purchase plan	16	—		1,158		—		—		—		1,158
Issuance of common stock under share-based award plans	492	4		27,345		—		—		—		27,349
Stock-based compensation	—	1		13,956		—		—		—		13,957




Balance, September 30, 2025	122,633	$	1,226	$	1,648,817	$	774,892	$	(24,378)	$	—	$	2,400,557

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


Consolidated Statements of Changes in Equity						SEI Investments Company
(unaudited)						and Subsidiaries
(Dollars in thousands, except per-share data)


	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Non-controlling Interests		Total Equity
	For the Nine Months Ended September 30, 2026
Balance, January 1, 2026	122,232	$	1,222	$	1,678,787	$	792,280	$	(24,505)	$	12,033	$	2,459,817
Net income	—	—		—		538,403		—		1,822		540,225
Other comprehensive loss	—	—		—		—		(8,724)		—		(8,724)
Purchase and retirement of common stock	(5,890)	(58)		(53,689)		(482,005)		—		—		(535,752)
Issuance of common stock under employee stock purchase plan	56	—		4,201		—		—		—		4,201
Issuance of common stock under share-based award plans	2,544	25		143,502		—		—		—		143,527
Stock-based compensation	—	—		46,809		—		—		—		46,809
Dividends declared ($0.52 per share)	—	—		—		(63,045)		—		—		(63,045)
Acquired non-controlling interest	—	—		—		—		—		29,587		29,587
Redemption value remeasurement	—	—		(60,640)		—		—		—		(60,640)
Capital distributions	—	—		—		—		—		(1,812)		(1,812)
Balance, September 30, 2026	118,942	$	1,189	$	1,758,970	$	785,633	$	(33,229)	$	41,630	$	2,554,193


	Shares of Common Stock	Common Stock		Capital In Excess of Par Value		Retained Earnings		Accumulated Other Comprehensive Loss		Non-controlling Interests		Total Equity
	For the Nine Months Ended September 30, 2025
Balance, January 1, 2025	126,840	$	1,268	$	1,539,816	$	758,003	$	(46,975)	$	—	$	2,252,112
Net income	—	—		—		542,804		—		—		542,804
Other comprehensive income	—	—		—		—		22,597		—		22,597
Purchase and retirement of common stock	(6,235)	(62)		(50,657)		(464,437)		—		—		(515,156)
Issuance of common stock under employee stock purchase plan	55	—		3,912		—		—		—		3,912
Issuance of common stock under share-based award plans	1,973	19		111,957		—		—		—		111,976
Stock-based compensation	—	1		43,789		—		—		—		43,790
Dividends declared ($0.49 per share)	—	—		—		(61,478)		—		—		(61,478)



Balance, September 30, 2025	122,633	$	1,226	$	1,648,817	$	774,892	$	(24,378)	$	—	$	2,400,557

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



Consolidated Statements of Cash Flows						SEI Investments Company
(unaudited)						and Subsidiaries
(Dollars in thousands)


	Nine Months Ended September 30,
	2026		2025
Cash flows from operating activities:
Net income	$	547,574	$	543,186
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	21,446		23,077
Amortization	57,175		33,071
Equity in earnings of unconsolidated affiliates	(110,989)		(94,290)
Distributions received from unconsolidated affiliates	121,734		104,768
Stock-based compensation	46,809		41,985
Provision for losses on receivables	(655)		765
Deferred income tax benefit	(2,150)		33,134
Net loss (gain) from investments	(4,387)		(4,244)
Net gain from business divestiture	—		(94,412)

Change in other long-term liabilities	947		2,711
Change in other assets	(10,117)		(6,029)
Contract costs capitalized, net of amortization	(5,609)		(3,653)
Contingent consideration fair value adjustments	—		(4,054)
Insurance rebates received for Health and Welfare Benefit Plan Trust	—		14,500
Insurance rebates transferred to Health and Welfare Benefit Plan Trust	—		(14,500)

Other	1,900		(898)
Change in current assets and liabilities:
Receivables from investment products	4,039		3,555
Receivables	(143,374)		(112,214)
Other current assets	(8,920)		(6,986)
Advances due from unconsolidated affiliate	54,269		51,738
Accounts payable	8,501		(5,210)
Accrued liabilities	(16,114)		(19,742)
Deferred revenue	341		560
Consolidated variable interest entities related:
Change from investment security transactions	12,380		(3,808)
Net gain from investments	(11,363)		(1,770)
Change in other assets and liabilities	1,890		24
Total adjustments	17,753		(61,922)
Net cash provided by operating activities	$	565,327	$	481,264

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



Consolidated Statements of Cash Flows						SEI Investments Company
(unaudited)						and Subsidiaries
(Dollars in thousands)


	Nine Months Ended September 30,
	2026		2025
Cash flows from investing activities:
Additions to property and equipment	(24,698)		(21,069)
Additions to capitalized software	(17,186)		(22,828)
Purchases of marketable securities	(152,089)		(123,708)
Prepayments and maturities of marketable securities	156,962		93,367


Purchases of interest in limited partnerships	—		(1,114)
Cash paid for acquisitions, net of cash acquired	(11,901)		—
Return of deposits on canceled acquisitions	17,594		—
Proceeds from fixed asset dispositions	—		3,293
Proceeds from business divestiture	—		116,020

Other investing activities	(769)		(3,464)
Net cash (used in) provided by investing activities	$	(32,087)	$	40,497
Cash flows from financing activities:


Purchase and retirement of common stock	(532,846)		(527,491)
Proceeds from issuance of common stock	147,728		115,888
Payment of dividends	(126,336)		(123,341)
Distributions to non-controlling interest holders	(1,812)		—
Consolidated variable interest entities related:
Non-controlling interest capital raised, net	757		18,470
Net cash used in financing activities	$	(512,509)	$	(516,474)
Effect of exchange rate changes on cash and cash equivalents	(6,103)		11,953
Net change in cash and cash equivalents and cash and cash equivalents held at consolidated variable interest entities	14,628		17,240
Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, beginning of period	470,595		840,193
Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, end of period	$	485,223	$	857,433

Non-cash investing activities:
Application of previously funded acquisition deposits toward purchase consideration	$	62,257	$	—


Reconciliation of Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities to the Consolidated Balance Sheets:	September 30, 2026		December 31, 2025
Cash and cash equivalents	$	399,766	$	399,804

Cash and cash equivalents held at consolidated variable interest entities	85,457		70,791
Total cash and cash equivalents and cash and cash equivalents held at consolidated variable interest entities	$	485,223	$	470,595

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


Notes to Consolidated Financial Statements						SEI Investments Company
(all figures are in thousands except share and per-share data)						and Subsidiaries

Note 1 – Summary of Significant Accounting Policies

Nature of Operations

SEI Investments Company (the Company), a Pennsylvania corporation, is a leading global provider of financial technology, operations, and asset management services within the financial services industry. The Company's core capabilities unify technology, operations, and asset management to power clients’ transformation across advice, asset management, and administration. The Company delivers modular or end‑to‑end solutions through a single, modern infrastructure that integrates platform technology, custody, operations, and investment expertise.

Investment processing solutions 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 services are recognized in Information processing and software servicing fees on the accompanying Consolidated Statements of Operations.

Investment operations solutions provide business process outsourcing services for investment managers and asset owners. These services 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 services are recognized in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations.

Investment management services provide comprehensive solutions for managing personal and institutional wealth. These services include goals-based investment strategies; SEI-sponsored and third-party investment products, including mutual funds, ETFs, collective investment products, alternative investment portfolios and separately managed accounts (SMA); and other market-specific advice, technology and operational components. These services are offered to wealth managers as part of a complete goals-based investment program for their end-investors. For institutional investors, the Company provides an Outsourced Chief Investment Officer (OCIO) platform and Unbundled OCIO platform that include investment management programs, as well as advisory and administrative services. Revenues from investment management services 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 which are, in the opinion of management, necessary for a fair statement of financial position of the Company as of September 30, 2026, the results of operations for the three and nine months ended September 30, 2026 and 2025, and cash flows for the nine months ended September 30, 2026 and 2025. 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, 2025.

There have been no significant changes in significant accounting policies during the nine months ended September 30, 2026 as compared to the significant accounting policies described in the Company's Annual Report on Form 10-K for the year ended December 31, 2025.

Variable Interest Entities

The Company or its affiliates have created numerous investment products for its clients in various types of legal entity structures. For entities determined to be a variable interest entity (VIE) in which the Company has a variable interest, an evaluation is required to determine whether the Company is the primary beneficiary. The Company evaluates its economic interests in the entity specifically determining if the Company has both the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and the obligation to absorb losses or the right to receive benefits that could potentially be significant to the VIE. When making the determination on whether the benefits received from an entity are significant, the Company considers the total economics of the entity, and analyzes whether the Company’s share of the economics is significant. The Company utilizes qualitative factors, and, where applicable, quantitative factors, while performing the analysis. At each balance sheet date, the Company determines whether any

reconsideration events, such as capital contributions and redemptions, either by the Company or third parties, have occurred that require it to revisit the VIE analysis and will consolidate or deconsolidate accordingly.

Consolidated Variable Interest Entities

VIEs which the Company controls as the primary beneficiary have been included in the Company’s Consolidated Financial Statements. The results of the consolidated VIEs are reported on a one-month lag due to the timing of the receipt of related financial statements. To the extent the Company is aware of material events that affect the consolidated VIEs during the intervening period, the impact of the events would be disclosed in the Notes to Consolidated Financial Statements.

The Company's consolidated net income on the accompanying Consolidated Statement of Operations includes the income (loss) attributable to non-controlling interests. The portion of the consolidated VIEs owned by other investors is included in Redeemable Non-controlling Interests on the accompanying Consolidated Balance Sheet. Activity related to other investors of the consolidated VIEs is eliminated through Net income attributable to non-controlling interests on the accompanying Consolidated Statement of Operations.

Investments held by consolidated VIEs are recorded at fair value. Unrealized gains and losses from the investments are recognized in Net gain from consolidated variable interest entities on the accompanying Consolidated Statement of Operations.

The Company deconsolidates all the assets and liabilities of the non-controlling interests from the Consolidated Balance Sheets once it no longer qualifies as the primary beneficiary of a consolidated VIE. See Note 15 for related disclosures regarding the Company's consolidated VIEs.

Redeemable Non-controlling Interests

Non-controlling interests that are redeemable outside the Company's control at fixed or determinable prices and dates are presented as temporary equity in the accompanying Consolidated Balance Sheets. Redeemable non-controlling interests are recorded at the greater of the redemption fair value or the carrying value of the non-controlling interest and adjusted each reporting period for income, loss and any distributions made. Remeasurements to the redemption value of the redeemable non-controlling interest are recognized in capital in excess of par value. As of December 31, 2025 and September 30, 2026, the Company has a redeemable non-controlling interest related to an acquisition (See Note 12).

The Company also includes redeemable non-controlling interests related to consolidated VIEs as temporary equity on the accompanying Consolidated Balance Sheets. Non-controlling interests in consolidated VIEs are subject to redemption by future investors. When redeemable amounts become legally payable to the investors, they are classified as a liability and included in Liabilities of consolidated variable interest entities on the Consolidated Balance Sheets.

Changes in the Company's redeemable non-controlling interests are as follows:


	Redeemable Non-controlling Interests
Balance, December 31, 2025	$	243,959
Increase from acquisition	10,400
Net income attributable to non-controlling interests	7,348
Capital contributions from non-controlling interests, net	758

Redemption value remeasurement	60,640
Balance, September 30, 2026	$	323,105

Non-consolidated Variable Interest Entities

The Company serves as the Manager, Administrator and Distributor for certain 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 in which it serves as the Manager, Administrator, Distributor or Trustee 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 $4,782 and $5,397 in fees during the three months ended September 30, 2026 and 2025, respectively. During the nine months ended September 30, 2026 and 2025, the Company waived $14,635 and $14,792, respectively, in fees.

New Accounting Pronouncements

In November 2024, the FASB issued ASU 2024-03, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (ASU 2024-03) and in January 2025, the FASB issued ASU 2025-01, Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Clarifying the Effective Date (ASU 2025-01), which clarified the effective date of ASU 2024-03. This standard requires new disclosures to disaggregate prescribed natural expenses underlying any income statement caption. ASU 2024-03 is effective for annual periods beginning after December 15, 2026 on a prospective basis and interim periods beginning after December 15, 2027. Early adoption is permitted. The Company is currently evaluating the impact of adopting the guidance on its consolidated financial statements and related disclosures.

In May 2025, the FASB issued ASU 2025-03, Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity (ASU 2025-03). This standard eliminates the presumption that the primary beneficiary of a VIE is the accounting acquirer in a business combination. Instead, entities are required to apply the general guidance in Accounting Standards Codification (ASC) 805 to determine the accounting acquirer when the transaction is primarily effected by the exchange of equity interests. ASU 2025-03 is effective for annual and interim periods beginning after December 15, 2026 on a prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting the guidance on its consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-06, Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal Use Software (ASU 2025-06). This standard clarifies capitalization thresholds for software development costs and aligns accounting treatment more closely with the economic substance of modern software development activities. ASU 2025-06 is effective for annual and interim periods beginning after December 15, 2027 on a retrospective, prospective or modified prospective basis. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2025-06 on its consolidated financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025-11, Interim Reporting (Topic 270): Narrow-Scope Improvements (ASU 2025-11). ASU 2025-11 is intended to improve the clarity and navigability of interim reporting guidance by (i) specifying the required form and content of interim financial statements, (ii) consolidating and organizing interim disclosure requirements across the Codification, and (iii) introducing a disclosure principle requiring entities to describe events occurring after the end of the most recent annual reporting period that have a material impact on the entity. ASU 2025-11 is effective for public business entities for fiscal years beginning after December 15, 2027, including interim periods within those fiscal years. Early adoption is permitted. The Company is currently evaluating the impact of adopting ASU 2025-11 on its consolidated financial statements and related disclosures.

Reclassifications

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

Note 2 – Equity Method Investments

The Company's equity method investments included in Investments on the accompanying Consolidated Balance Sheets consist of:


	September 30, 2026		December 31, 2025
Investment in LSV Asset Management	$	59,465	$	121,512
Other equity method investments	34,808		67,637
Total	$	94,273	$	189,149

LSV Asset Management

The Company has an investment in LSV Asset Management (LSV), a registered investment advisor that provides investment advisory services primarily to institutions, including pension plans and investment companies. LSV is currently an investment sub-advisor for a limited number of SEI-sponsored investment products. The Company's partnership interest in LSV as of September 30, 2026 was 38.4%. The Company’s interest in the net assets of LSV is included in Investments 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.

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 earnings of LSV is reflected in Equity in earnings of unconsolidated affiliates on the accompanying Consolidated Statements of Operations.

At September 30, 2026 and December 31, 2025, the Company’s total investment in LSV was $59,465 and $121,512, respectively. The Company's investment includes advances provided to LSV related to their working capital accounts. The Company receives partnership distributions from LSV on a quarterly basis. The Company received partnership distributions from LSV of $117,726 and $104,768 in the nine months ended September 30, 2026 and 2025, 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 $39,590 and $31,903 during the three months ended September 30, 2026 and 2025, respectively. During the nine months ended September 30, 2026 and 2025, the Company’s proportionate share in the earnings of LSV was $109,946 and $94,290, respectively.

This table contains condensed financial information of LSV:


Condensed Statement of Operations	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Revenues	$	136,559	$	111,750	$	392,867	$	325,894
Net income	102,995		82,812		285,794		244,639

On April 1, 2026, LSV provided an interest in the partnership to select key employees which reduced the ownership percentage of each existing partner on a pro-rata basis. As a result, the Company's total partnership interest in LSV was reduced slightly to approximately 38.4% from approximately 38.5%.

Other Equity Method Investments

The Company's other equity method investments consist of several firms acquired in December 2025 and during 2026 in connection with the Stratos Acquisition (See Note 12) and investments in non-affiliated limited partnership funds in which the Company holds a more than minor interest. At September 30, 2026 and December 31, 2025, the value of the equity method entities related to Stratos was $23,945 and $57,153, respectively. At September 30, 2026 and December 31, 2025, the value of the Company's investments in limited partnership funds was $10,863 and $10,484, respectively.

Note 3 – Composition of Certain Financial Statement Captions

Receivables

Receivables on the accompanying Consolidated Balance Sheets consist of:


	September 30, 2026		December 31, 2025
Trade receivables	$	190,196	$	178,902
Fees earned, not billed	591,774		483,860
Taxes receivable	64,220		40,415
Other receivables	7,487		8,487
	853,677		711,664
Less: Allowance for doubtful accounts	(2,398)		(1,916)
	$	851,279	$	709,748

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.

Property and Equipment

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


	September 30, 2026		December 31, 2025
Buildings	$	223,452	$	221,488
Equipment	173,533		158,740
Land	27,457		27,457
Purchased software	165,244		165,229
Furniture and fixtures	25,049		23,066
Leasehold improvements	25,545		23,003
Construction in progress	1,119		151
	641,399		619,134
Less: Accumulated depreciation	(487,903)		(468,700)
Property and Equipment, net	$	153,496	$	150,434

The Company recognized $21,446 and $23,077 in depreciation expense related to property and equipment for the nine months ended September 30, 2026 and 2025, respectively.

Deferred Contract Costs

Deferred contract costs, which primarily consist of deferred sales commissions, were $58,954 and $53,345 as of September 30, 2026 and December 31, 2025, respectively. The Company deferred expenses related to contract costs of $17,909 and $13,528 during the nine months ended September 30, 2026 and 2025, respectively. Amortization expense related to deferred contract costs were $12,300 and $9,875 during the nine months ended September 30, 2026 and 2025, 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 nine months ended September 30, 2026.

Accrued Liabilities

Accrued liabilities on the accompanying Consolidated Balance Sheets consist of:


	September 30, 2026		December 31, 2025
Accrued employee compensation	$	120,221	$	143,358


Accrued consulting, outsourcing and professional fees	34,268		29,186
Accrued sub-advisory, distribution and other asset management fees	58,516		56,445

Accrued dividend payable	1,891		65,182
Accrued income taxes	7,657		6,560
Other accrued liabilities	62,367		59,092
Total accrued liabilities	$	284,920	$	359,823

Note 4 – Fair Value Measurements

The fair value of the Company’s financial assets and liabilities is determined in accordance with the fair value hierarchy. The pricing policies and procedures applied to the Company's Level 1 and Level 2 financial assets during the nine months ended September 30, 2026 were consistent with those as described in the Company's Annual Report on Form 10-K at December 31, 2025. Level 1 financial assets and liabilities of the Company and consolidated VIEs consist mainly of equity securities and investments in open-end and closed-end investment products that are quoted daily. Level 2 financial assets primarily consist of Government National Mortgage Association (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 Company's Level 3 financial liabilities at September 30, 2026 and December 31, 2025 consist entirely of the estimated fair value of

the contingent considerations resulting from business acquisitions. There were no transfers of financial assets between levels within the fair value hierarchy during the nine months ended September 30, 2026.

The fair value of the Company's investments in funds sponsored by LSV are 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 investment funds sponsored by LSV allow for investor redemptions at the end of each calendar month. The investments measured using the NAV as a practical expedient have not been classified in the fair value hierarchy but are presented in the tables below to permit reconciliation to the amounts presented on the accompanying Consolidated Balance Sheets.

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


	At September 30, 2026
	Level 1		Level 2		Level 3		NAV as a Practical Expedient		Total
Financial Assets
SEI Investments Company
Equity securities	$	70,144	$	—	$	—	$	—	$	70,144
Available-for-sale debt securities	—		155,995		—		—		155,995
Securities owned	—		25,750		—		—		25,750
Investment funds sponsored by LSV	—		—		—		14,176		14,176
Investments in limited partnership funds	—		—		—		1,307		1,307
Total financial assets of SEI Investments Company	70,144		181,745		—		15,483		267,372
Consolidated VIEs
Equity securities	135,268		—		—		—		135,268
Total financial assets of consolidated VIEs	135,268		—		—		—		135,268
Total financial assets measured at fair value	$	205,412	$	181,745	$	—	$	15,483	$	402,640

Financial Liabilities
SEI Investments Company
Contingent considerations	$	—	$	—	$	7,834	$	—	$	7,834
Total financial liabilities of SEI Investments Company	—		—		7,834		—		7,834
Consolidated VIEs
Securities sold short	131,408		—		—		—		131,408
Total financial liabilities of consolidated VIEs	131,408		—		—		—		131,408
Total financial liabilities measured at fair value	$	131,408	$	—	$	7,834	$	—	$	139,242


	At December 31, 2025
	Level 1		Level 2		Level 3		NAV as a Practical Expedient		Total
Financial Assets
SEI Investments Company
Equity securities	$	67,414	$	—	$	—	$	—	$	67,414
Available-for-sale debt securities	—		158,690		—		—		158,690
Securities owned	—		33,777		—		—		33,777
Investment funds sponsored by LSV	—		—		—		11,593		11,593
Investments in limited partnership funds	—		—		—		1,158		1,158
Total financial assets of SEI Investments Company	67,414		192,467		—		12,751		272,632
Consolidated VIEs
Equity securities	113,119		—		—		—		113,119
Total financial assets of consolidated VIEs	113,119		—		—		—		113,119
Total financial assets measured at fair value	$	180,533	$	192,467	$	—	$	12,751	$	385,751

Financial Liabilities
SEI Investments Company
Contingent considerations	$	—	$	—	$	7,834	$	—	$	7,834
Total financial liabilities of SEI Investments Company	—		—		7,834		—		7,834
Consolidated VIEs
Securities sold short	108,243		—		—		—		108,243
Total financial liabilities of consolidated VIEs	108,243		—		—		—		108,243
Total financial liabilities measured at fair value	$	108,243	$	—	$	7,834	$	—	$	116,077

Note 5 – Investments and Other Marketable Securities

Investments on the accompanying Consolidated Balance Sheets consist of:


	September 30, 2026		December 31, 2025
Available for sale debt securities	$	155,995	$	158,690
Investment products and equities	70,144		67,414
Investments in affiliated funds	14,176		11,593
Investments in limited partnership funds	1,307		1,158
Equity method investments (See Note 2)	94,273		189,149
Total	$	335,895	$	428,004

Available For Sale Debt Securities

The Company's available-for-sale debt securities consist of


	At September 30, 2026
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Mortgage-backed securities issued by GNMA	$	139,418	$	—	$	(11,418)	$	128,000
Corporate and government agency debt securities	27,990		5		—		27,995
	$	167,408	$	5	$	(11,418)	$	155,995


	At December 31, 2025
	Cost Amount		Gross Unrealized Gains		Gross Unrealized (Losses)		Fair Value
Mortgage-backed securities issued by GNMA	$	163,071	$	—	$	(4,381)	$	158,690

	$	163,071	$	—	$	(4,381)	$	158,690

Unrealized holding losses, net of income tax benefit, at September 30, 2026 and December 31, 2025 of available-for-sale debt securities were:


	September 30, 2026		December 31, 2025
Unrealized holding losses	$	(11,418)	$	(4,381)
Less: Income tax benefit	2,626		1,008
Unrealized holding losses, net of tax	(8,792)		(3,373)

The 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.

The unrealized losses, net of unrealized gains, associated with the Company's available-for-sale debt securities 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 September 30, 2026
	Cost		Fair Value
Within one year	$	8,161	$	8,095
After one year through five years	5,769		4,879
After 5 years through 10 years	40,826		35,139
After 10 years	112,652		107,882
	$	167,408	$	155,995


	At December 31, 2025
	Cost		Fair Value
Within one year	$	—	$	—
After one year through five years	3,248		2,930
After 5 years through 10 years	14,789		13,787
After 10 years	145,034		141,973
	$	163,071	$	158,690

There were no material realized gains or losses from available-for-sale debt securities during the nine months ended September 30, 2026 and 2025, respectively.

Investment Products and Equities

The Company's investments in investment products and equities had a fair value of $70,144 and $67,414 at September 30, 2026 and December 31, 2025, respectively. There were no material realized gains or losses during the nine months ended September 30, 2026 and 2025, respectively, from investment products and equities.

Investments in Affiliated Funds

The Company has an investment in funds sponsored by LSV. The Company records this investment 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 Company's investment in the funds had a fair value of $14,176 and $11,593 at September 30, 2026 and December 31, 2025, respectively. The Company recognized unrealized gains of $2,583 and $2,393 during the nine months ended September 30, 2026 and 2025, 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 $25,750 and $33,777 at September 30, 2026 and December 31, 2025, respectively. There were no material net gains or losses related to the securities during the three and nine months ended September 30, 2026 and 2025.

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 $255,318 and $235,933 at September 30, 2026 and December 31, 2025, respectively. There were no material unrealized or realized gains or losses from these investments during the nine months ended September 30, 2026 and 2025. Cash equivalents includes $89,189 and $201,675 at September 30, 2026 and December 31, 2025, respectively, invested in SEI-sponsored open-ended money market investment products. Investments in money market funds and commercial paper are Level 1 assets.

Note 6 – Line of Credit

On August 18, 2025 (the Closing Date), the Company entered into a five-year $500,000 Credit Agreement (the Facility) with U.S. Bank National Association, and a syndicate of other lenders. The Facility is scheduled to expire in August 2030, at which time any aggregate principal amount of loans outstanding becomes payable in full. The aggregate principal amount of the Facility may be increased by an additional $250,000 under certain conditions set forth in the agreement. The Facility replaces the Company’s $325,000 five-year credit facility that was scheduled to expire in April 2026. Interest on borrowings under the Facility is payable 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 1.25% or the Term Secured Overnight Financing Rate (Term SOFR) plus a premium that can range from 1.25% to 2.25% 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 relevant agreement). The Base Rate is defined as the highest of a) the Prime Rate, b) the Federal Funds Rate (each as defined in the relevant agreement) plus 0.50%, or c) 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 Facility. The quarterly fees for the Facility can range from 0.15% of the amount of the unused portion of the Facility to 0.35%, depending on the Company’s Leverage Ratio. Certain wholly-owned subsidiaries of the Company have guaranteed the obligations of the Company under the Facility.

The Company may issue up to $25,000 in letters of credit under the terms of the Facility. The Company pays a periodic commission fee based on the applicable rate with respect to borrowings that are designated as SOFR Loans (as defined in the relevant agreement) plus an issuance fee agreed upon between the Company and the lender.

The Facility contains covenants that, among other things, restrict the ability of the Company and its subsidiaries to engage in mergers, consolidations, asset sales, acquisitions, transactions with affiliates, or to incur indebtedness or liens, subject in certain cases to certain exceptions and thresholds, as defined in the related agreement. In the event of a default under the Facility, the Company would also be restricted from paying dividends on, or repurchasing, its capital 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 Facility, all loans outstanding under the Facility may be declared immediately due and payable and all commitments under the Facility may be terminated.

The Company was in compliance with all covenants of the credit facilities during the nine months ended September 30, 2026. As of October 20, 2026, the Company had outstanding letters of credit of $4,630 under the Facility. The amount of the Facility that is available for general corporate purposes as of October 20, 2026 was $495,370.

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 and nine months ended September 30, 2026 and 2025, respectively, as follows:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Stock-based compensation expense	$	16,000	$	13,956	$	46,809	$	41,985
Less: Deferred tax benefit	(2,596)		(2,561)		(7,723)		(7,737)
Stock-based compensation expense, net of tax	$	13,404	$	11,395	$	39,086	$	34,248

As of September 30, 2026, there was approximately $64,142 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 total intrinsic value of options exercised during the nine months ended September 30, 2026 was $87,923. The total options exercisable as of September 30, 2026 had an intrinsic value of $255,110. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Company’s common stock as of September 30, 2026 and the weighted average exercise price of the options. The market value of the Company’s common stock as of September 30, 2026 was $102.66 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of September 30, 2026 was $59.73. Total options that were outstanding as of September 30, 2026 were 11,154,000. Total options that were exercisable as of September 30, 2026 were 5,942,000.

Earnings per Share

The calculations of basic and diluted earnings per share for the three and nine months ended September 30, 2026 and 2025 are:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Net income	$	171,247	$	164,586	$	547,574	$	543,186
Less: Net income attributable to non-controlling interests	2,989		382		9,171		382
Net income attributable to SEI Investments Company	$	168,258	$	164,204	$	538,403	$	542,804
Shares used to compute basic earnings per common share	118,415,000		123,099,000		120,138,000		124,710,000
Dilutive effect of stock awards	3,597,000		3,226,000		3,142,000		2,974,000
Shares used to compute diluted earnings per common share	122,012,000		126,325,000		123,280,000		127,684,000
Basic earnings per common share	$	1.42	$	1.33	$	4.48	$	4.35
Diluted earnings per common share	$	1.38	$	1.30	$	4.37	$	4.25

During the three months ended September 30, 2026 and 2025, employee stock options to purchase 4,368,000 and 5,687,000 shares of common stock with an average exercise price of $75.30 and $66.09, respectively, were outstanding but not included in the computation of diluted earnings per common share. During the nine months ended September 30, 2026 and 2025, employee stock options to purchase 4,396,000 and 5,744,000 shares of common stock with an average exercise price of $75.28 and $66.04, respectively, were outstanding but not included in the computation of diluted earnings per common share. These options for the three and nine month periods were not included in the computation of diluted earnings per common share because either the performance conditions have not been satisfied or would not have been satisfied if the reporting date was the end of the contingency period or the options' exercise price was greater than the average market price of the Company’s common stock and the effect on diluted earnings per common share would have been anti-dilutive.

Common Stock Buyback

The Company’s Board of Directors, under multiple authorizations, has authorized the repurchase of common stock on the open market or through private transactions. The Company purchased 5,890,000 shares at a total cost of $535,752 during the nine months ended September 30, 2026, 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. On October 20, 2026, the Company's Board of Directors approved an

increase in the stock repurchase program by an additional $800,000. As of October 20, 2026, the Company had approximately $925,643 of authorization remaining for the purchase of common stock under the program.

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

Cash Dividend

On May 27, 2026, the Board of Directors declared a cash dividend of $0.52 per share on the Company's common stock, which was paid on June 16, 2026, to shareholders of record on June 8, 2026. Cash dividends declared during the nine months ended September 30, 2026 and 2025 were $63,045 and $61,478, respectively.

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, 2026	$	(21,132)	$	(3,373)	$	(24,505)

Other comprehensive loss before reclassifications	(3,309)		(4,505)		(7,814)
Amounts reclassified from accumulated other comprehensive loss	—		(910)		(910)
Net current-period other comprehensive loss	(3,309)		(5,415)		(8,724)

Balance, September 30, 2026	$	(24,441)	$	(8,788)	$	(33,229)

Note 9 – Business Segment Information

The Company's business segments are generally organized around its target markets. The Company’s reportable business segments are:

Investment Managers – Provides an outsourced investment management operating platform to alternative and traditional asset managers, fund companies, and sovereign wealth funds;

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; 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 Company's CODM is the chief executive officer who uses the reported measures of each business segment's profit or loss to allocate resources and assess performance by comparing historical, actual and forecasted amounts. The Company's CODM does not evaluate business segments using asset or capital expenditure information.

There are no inter-segment revenues for the three and nine months ended September 30, 2026 and 2025. 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, 2025.

The following tables highlight certain financial information about each of the business segments for the three months ended September 30, 2026 and 2025:


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2026
Total revenue	$	235,817	$	160,439	$	185,378	$	70,638	$	9,771	$	662,043
Less:
Operations & services	98,035		57,945		49,326		20,966		3,004		229,276
Sales, marketing & client service	10,993		11,736		24,382		9,014		2,261		58,386
Technology services & infrastructure	14,156		31,418		9,541		1,458		1,223		57,796
Strategic initiatives & new business development	12,292		20,815		21,016		3,838		3,180		61,141
Other segment expenses (1)	8,086		6,361		3,413		2,525		920		21,305
Total segment expenses	143,562		128,275		107,678		37,801		10,588		427,904
Non-controlling interest & other, net	—		—		2,034		—		—		2,034
Segment profit (loss)	$	92,255	$	32,164	$	75,666	$	32,837	$	(817)	$	232,105


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
	For the Three Months Ended September 30, 2025
Total revenue	$	207,050	$	143,994	$	147,465	$	71,826	$	8,176	$	578,511
Less:
Operations & services	89,335		54,044		46,211		21,010		1,810		212,410
Sales, marketing & client service	11,240		10,723		8,819		9,820		3,844		44,446
Technology services & infrastructure	12,887		28,809		9,074		1,678		1,603		54,051
Strategic initiatives & new business development	8,316		21,305		13,389		4,168		3,471		50,649
Other segment expenses (1)	4,156		5,882		1,635		1,392		1,135		14,200
Total segment expenses	125,934		120,763		79,128		38,068		11,863		375,756

Segment profit (loss)	$	81,116	$	23,231	$	68,337	$	33,758	$	(3,687)	$	202,755

(1) Other segment expenses for each reportable segment includes professional services, occupancy and certain overhead expenses.

A reconciliation of the total segment profit to income from operations on the Consolidated Statements of Operations for the three months ended September 30, 2026 and 2025 is as follows:


	Three Months Ended September 30,
	2026		2025
Total segment profit	$	232,105	$	202,755
Corporate overhead expenses	(36,140)		(42,794)
Segment reclassification (2)	2,034		—
Income from operations	$	197,999	$	159,961

(2) Primarily includes non-controlling interest and earnings from equity method investments.

Other income and expense items to reconcile income from operations to income before income taxes on the Consolidated Statements of Operations include net gain from investments, interest and dividend income, interest expense, gain on sale of business, other income, the Company's portion of the earnings of LSV included in equity in earnings of unconsolidated affiliates and net gain from consolidated variable interest entities. These items are not allocated to the Company's segments.

The following tables provide additional information for the three months ended September 30, 2026 and 2025 pertaining to the business segments:


	Amortization				Depreciation
	2026		2025		2026		2025
Investment Managers	$	1,700	$	1,301	$	1,764	$	1,788
Private Banks	5,634		5,427		2,645		2,681
Investment Advisors	9,871		2,473		1,689		1,889
Institutional Investors	1,953		1,956		420		474
Investments in New Businesses	416		416		109		122
Total from business segments	$	19,574	$	11,573	$	6,627	$	6,954
Corporate overhead	110		339		492		531
	$	19,684	$	11,912	$	7,119	$	7,485

The following tables highlight certain financial information about each of business segment for the nine months ended September 30, 2026 and 2025:


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2026
Total revenue	$	684,213	$	469,580	$	532,970	$	211,856	$	27,224	$	1,925,843
Less:
Operations & services	289,544		169,647		147,613		63,286		7,559		677,649
Sales, marketing & client service	33,821		35,048		63,098		26,860		7,200		166,027
Technology services & infrastructure	41,154		91,556		27,193		4,602		3,849		168,354
Strategic initiatives & new business development	34,110		60,882		59,783		11,118		8,919		174,812
Other segment expenses (3)	14,850		16,393		8,214		5,898		2,293		47,648
Total segment expenses	413,479		373,526		305,901		111,764		29,820		1,234,490
Non-controlling interest & other, net	—		—		4,732		—		—		4,732
Segment profit (loss)	$	270,734	$	96,054	$	222,337	$	100,092	$	(2,596)	$	686,621


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
	For the Nine Months Ended September 30, 2025
Total revenue	$	594,165	$	423,157	$	421,234	$	209,675	$	41,225	$	1,689,456
Less:
Operations & services	263,945		157,576		130,048		62,401		12,408		626,378
Sales, marketing & client service	31,573		29,756		28,251		29,574		13,569		132,723
Technology services & infrastructure	39,407		85,412		26,849		4,810		4,473		160,951
Strategic initiatives & new business development	20,987		65,185		37,191		8,994		13,993		146,350
Other segment expenses (3)	8,869		16,307		5,045		4,016		4,346		38,583
Total segment expenses	364,781		354,236		227,384		109,795		48,789		1,104,985
Segment profit (loss)	$	229,384	$	68,921	$	193,850	$	99,880	$	(7,564)	$	584,471

(3) Other segment expenses for each reportable segment includes professional services, occupancy and certain overhead expenses.

A reconciliation of the total segment profit to income from operations in the Consolidated Statements of Operations for the nine months ended September 30, 2026 and 2025 is as follows:


	2026		2025
Total segment profit	$	686,621	$	584,471
Corporate overhead expenses	(106,852)		(118,778)
Segment reclassification (4)	4,732		—
Income from operations	$	584,501	$	465,693

(4) Primarily includes non-controlling interest and earnings from equity method investments.

The following tables provide additional information for the nine months ended September 30, 2026 and 2025:


	Amortization				Depreciation
	2026		2025		2026		2025
Investment Managers	$	5,109	$	1,704	$	5,372	$	3,582
Private Banks	16,943		16,046		7,870		7,634
Investment Advisors	27,737		7,342		5,128		5,914
Institutional Investors	5,859		5,775		1,339		1,287
Investments in New Businesses	1,247		1,707		340		411
Total from business segments	$	56,895	$	32,574	$	20,049	$	18,828
Corporate Overhead	280		497		1,397		4,249
	$	57,175	$	33,071	$	21,446	$	23,077

Note 10 – Income Taxes

The gross liability for unrecognized tax benefits at September 30, 2026 and December 31, 2025 was $15,415 and $13,613, respectively, exclusive of interest and penalties, of which $15,823 and $13,577 would affect the effective tax rate if the Company were to recognize the tax benefit.

The Company classifies interest and penalties on unrecognized tax benefits as income tax expense. As of September 30, 2026 and December 31, 2025, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $2,420 and $1,685, respectively.


	September 30, 2026		December 31, 2025
Gross liability for unrecognized tax benefits, exclusive of interest and penalties	$	15,415	$	13,613
Interest and penalties on unrecognized benefits	2,420		1,685
Total gross uncertain tax positions	$	17,835	$	15,298
Amount included in Current liabilities	$	4,057	$	3,642
Amount included in Other long-term liabilities	13,778		11,656
	$	17,835	$	15,298

The effective income tax rate for the three and nine months ended September 30, 2026 and 2025 differs from the federal income tax statutory rate due to the following:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Statutory rate	21.0	%	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.8		2.7		2.8		2.7
Foreign tax expense and tax rate differential	(0.1)		(0.1)		(0.1)		(0.1)
Tax benefit from stock option exercises	(2.7)		(1.0)		(1.5)		(0.8)
Energy tax credits	(0.7)		—		(0.7)		—



Other, net	(0.1)		(0.7)		0.1		(0.5)
	20.2	%	21.9	%	21.6	%	22.3	%

The decrease in the effective tax rate for the three and nine months ended September 30, 2026 was primarily due to higher excess tax benefits recognized on employee stock option exercises and the favorable impact from the recognition of federal energy tax credits purchased during the period, both of which reduced the Company's income tax expense.

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 2022 and is no longer subject to state, local or foreign income tax examinations by authorities for years before 2018.

Note 11 – Commitments and Contingencies

In the ordinary course of business, the Company from time to time enters into contracts containing indemnification obligations of the Company. These obligations may require the Company to make payments to another party upon the occurrence of certain events including the failure by the Company to meet its performance obligations under the contract. These contractual indemnification provisions are often standard contractual terms of the nature customarily found in the type of contracts entered into by the Company. In many cases, there are no stated or notional amounts included in the indemnification provisions. There are no amounts reflected on the Consolidated Balance Sheets as of September 30, 2026 and December 31, 2025 related to these indemnifications.

Rubicon Wealth Management

As the Company reported in prior filings with the Commission, on May 1, 2024, SEI Private Trust Company (SPTC), a wholly-owned, operating subsidiary of SEI, terminated its client relationship with Rubicon Wealth Management LLC, an SPTC investment advisor client (Rubicon). SPTC terminated the Rubicon relationship due to suspicions of fraudulent activity by Rubicon’s founder, Scott Mason. Mr. Mason and Rubicon were investigated by the U.S. Department of Justice and Securities and Exchange Commission and Mr. Mason pled guilty to several crimes and consented to a judgment being entered against him in both proceedings. On June 25, 2025, Mr. Mason was sentenced to 97 months in prison, followed by three years of supervised release. Mason was also ordered to pay nearly $25,000 in restitution to his victims and more than $2,300 in back taxes to the Internal Revenue Service.

The previously disclosed lawsuits filed against SPTC in its capacity as custodian for the Rubicon accounts of the plaintiffs (collectively, the Rubicon Actions) remain pending in the Court of Common Pleas of Montgomery County, Pennsylvania, and are now in the discovery phase. While the ultimate outcomes of these litigations remain uncertain, SPTC is vigorously defending each of the Rubicon Actions. Currently, SPTC estimates that the aggregate amount of Rubicon client assets transferred at the direction of Mr. Mason from SPTC custodial accounts to accounts of an entity, Orchard Park, that unbeknownst to the investors or SPTC was established and controlled by Mr. Mason and was used by Mr. Mason for

personal expenditures is approximately $13,500. In the event that SPTC is unsuccessful in its defense of the Rubicon Actions, SEI does not currently believe that the losses associated with such unsuccessful defense would exceed the approximately $13,500 of Rubicon client assets that Mr. Mason directed to be transferred to Orchard Park.

SEI Capital Accumulation Plan

As the Company reported in prior filings with the Commission, on December 26, 2025, a class action complaint was filed in the United States District Court for the Eastern District of Pennsylvania by David Hall and Jennifer Knapp, individually and as representatives of similarly situated persons, and on behalf of the SEI Capital Accumulation Plan (the Plan), naming the Company and its affiliated and/or related entities SEI Investments Management Corporation, SEI Capital Accumulation Plan Administration Committee, and John Does 1-30 as defendants (the Hall Complaint). The Hall Complaint seeks damages for defendants’ alleged breach of fiduciary duties under ERISA with respect to selecting and monitoring certain of the Plan’s investment options, which are affiliated investment products.

Defendants believe that they have valid defenses to plaintiffs’ claims and deny any wrongdoing. However, to avoid the costs and burdens of protracted litigation, after a private mediation the Company reached an agreement to resolve the Hall litigation as a class settlement. The terms of the resolution are not yet public, and the Hall plaintiffs must file a motion for preliminary approval on or before October 30, 2026. At this stage of the litigation, the Company is not reasonably able to provide an estimate of loss, if any, with respect to the matters set forth in the Hall Complaint.

United Kingdom Financial Conduct Authority Supervisory Review of SEI Investments (Europe) Limited

As previously reported, on July 31, 2024, SEI Investments (Europe) Limited (SIEL), an indirectly, wholly-owned operating subsidiary of SEI, received a final requirement notice from the Financial Conduct Authority of the United Kingdom (the FCA) under section 166(3)(a) of the Financial Services and Markets Act 2000 (FSMA), requiring SIEL to engage a “Skilled Person” to undertake a two-stage review of SIEL’s governance arrangements and control environment.

Following the delivery of the Skilled Person’s Phase 1 Report, SIEL agreed with the FCA that a variation of SIEL’s FCA permissions would apply from February 26, 2025 (the VREQ), such that SIEL needed the FCA’s prior consent to onboard new institutional clients where this would require a material change to its existing propositions, systems or services, or significant senior management engagement. SIEL also needed consent to launch any new proposition, product, or service that was not already offered by it at the time the VREQ came into effect.

Following a comprehensive program of change to address both the Skilled Person’s recommendations and the FCA’s underlying concerns, the FCA confirmed that the s.166 was closed on July 29, 2026.

On October 22, 2026, the FCA confirmed that it had lifted the VREQ with immediate effect, with the result that SIEL’s ability to onboard new institutional clients had been fully restored.

SIEL is no longer required to seek FCA permission for launching new products or solutions or new client engagements.

Other Matters

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

Unfunded Commitments to Limited Partnership Funds

The Company has unfunded commitments of $22,520 at October 20, 2026 to limited partnership funds which are expected to be funded over time as capital calls are made in accordance with the applicable partnership agreements.

Unused Letters of Credit

As of September 30, 2026, the Company had outstanding and unused letters of credit of $4,630 under its Credit Facility (See Note 6). The letters of credit were issued for certain municipal requirements related to the expansion of the Company's corporate headquarters and are due to expire in 2026. The Company does not expect that any material amounts will be drawn under these letters of credit. Accordingly, no liability has been recorded in the accompanying Consolidated Balance Sheets.

Note 12 – Business Acquisitions and Divestitures

Stratos Wealth Holdings

On July 17, 2025, SEI-Eclipse Holding Company, LLC (SEI-Eclipse), a newly-formed, wholly-owned indirect subsidiary of the Company, and the Company entered into a definitive agreement (as amended, the Acquisition Agreement) with Stratos Wealth Holdings, LLC (Stratos) and Stratos Intermediate Holdco I, LLC (Stratos US Holdings) to acquire a controlling interest in the businesses operated by Stratos. Stratos is a holding company that directly and indirectly holds 100.0% of the equity of certain subsidiary holding companies (including Stratos US Holdings), which, in turn, own equity interests in multiple operating companies that form a network of over 350 affiliated financial advisors in the U.S. and Mexico. The transaction was designed to be completed by SEI-Eclipse in two stages. The first stage (the Stratos Acquisition) entailed the acquisition of all of the outstanding equity of Stratos US Holdings, which directly owns equity interests in the U.S.-based Stratos operating entities. The second stage of the transaction (the Second Stage) was contemplated to be a purchase by SEI Eclipse of the outstanding equity of the Stratos subsidiary holding company (Stratos NSC Holdings) that directly owns a controlling interest in NSC Asesores, S.C, the Mexico based operating entity (NSC Asesores) for approximately $103,000.

The Stratos Acquisition closed in December 2025. During the quarter, the Company and Stratos entered into an agreement to terminate the Second Stage and that released the Company from any and all obligations with respect to the consummation of the Second Stage (the Termination Agreement). The Company paid $32,500 to Stratos upon execution of the Termination Agreement. The Termination Agreement defines the conditions on which the Company may be required to make additional payments to Stratos if such conditions are satisfied within 60 months from the date of the Termination Agreement. Additionally, the Termination Agreement defines the conditions on which the Company may recover some or all of the initial payment of $32,500. The Company used an option pricing model to estimate the fair value of the payment provisions in the Termination Agreement. The fair value of the payment provisions was determined to be approximately equal to the $32,500 paid to Stratos upon execution of the Termination Agreement. It was also determined that any potential future additional payments or amounts potentially recoverable that were previously paid are immaterial as of September 30, 2026. As a result, the Company recognized a one-time charge of $32,500 during the third quarter 2026 resulting from the Termination Agreement which is reflected in Other (expense) income on the accompanying Consolidated Statements of Operations.

The acquisition consideration paid in consummating the Stratos Acquisition was comprised of cash of $323,102, funded by a cash contribution by the Company to SEI-Eclipse, and the issuance of 42.5% of the common units of SEI-Eclipse with an estimated fair value of $235,145 (the Stratos Acquisition). Following consummation of the Stratos Acquisition, the Company indirectly owns a 57.5% controlling interest in SEI-Eclipse and certain Stratos equity holders own the remaining 42.5% of the common units of SEI-Eclipse through an aggregator entity (Stratos Aggregator). This 42.5% minority interest in SEI-Eclipse held by Stratos Aggregator is subject to three equal put/call options by SEI-Eclipse or Stratos Aggregator exercisable at 36 months, 54 months and 72 months after the Closing Date, and is presented as redeemable non-controlling interest on the accompanying Consolidated Balance Sheets. If the puts or calls are fully exercised, it will result in the Company indirectly owning 100.0% of the outstanding equity of SEI-Eclipse.

The Company accounted for the Stratos Acquisition as a business combination using the acquisition method of accounting in accordance with ASC 805, Business Combinations. The purchase price has been allocated to the tangible assets and identifiable intangible assets acquired and liabilities assumed, based upon their estimated fair values. In addition, the redeemable non-controlling interest was recorded at fair value under ASC 805. The Company finalized its accounting for the purchase price allocation related to the Stratos business during the third quarter 2026.

As part of the Stratos Acquisition, the Company, via its 57.5% indirect interest in SEI-Eclipse, acquired a portfolio of minority equity investments which were accounted for under ASC 323, Investments - Equity Method and Joint Ventures as of the Closing Date due to the Company having significant influence. These investments were determined to have an acquisition date fair value of $56,974. For certain equity method investments, the Company, via its 57.5% indirect interest in SEI-Eclipse, also acquired rights to obtain a controlling interest in the investees. These contractual rights were previously negotiated between Stratos Wealth Enterprises, LLC, one of the U.S.-based Stratos operating entities (SWE), and the equity method investee controlling interest holders and were contingently exercisable upon a change of control of Stratos. The purchase price under the contractual rights is based on a proscribed formula tied to historical profitability of the applicable equity method investee. The Company determined that the fair value of these rights was de minimis on the Closing Date.

Given the Company’s intent to cause SWE to exercise its contractual rights to acquire controlling interests in the equity method investees and to close on the purchases contemplated after the Closing Date, the Company deposited $118,606 in escrow on the Closing Date.

The following unaudited pro forma consolidated financial information reflects the results of operations of the Company for the nine months ended September 30, 2026 and 2025 as if the Stratos Acquisition had occurred as of January 1, 2025,

after giving effect to certain purchase accounting adjustments. These amounts are based on financial information of the Stratos business and are not necessarily indicative of what the Company’s operating results would have been had the Stratos Acquisition taken place on January 1, 2025:


	Nine Months Ended September 30,
	2026		2025
Revenues	$	1,925,843	$	1,725,408
Net income attributable to SEI Investments Company	571,460		450,173

The unaudited pro forma consolidated financial information includes certain nonrecurring adjustments directly attributable to the Stratos Acquisition. These adjustments primarily relate to transaction‑related costs and were immaterial.

SWE Acquisition of Equity Method Investments (EMI Entities)

SWE used cash funded from the deposit account to purchase 100% interests of nine entities and a majority interest in two additional entities (collectively, the EMI Entities) through the exercise of its contractual rights noted above. The closing date on the additional interest acquired occurred at various dates during the first quarter of 2026. The following table summarizes the purchase consideration for the EMI Entities as of the various closing dates during the first quarter of 2026:


	Purchase Consideration
Cash in deposit account	$	62,257
Promissory notes to sellers	30,687
Fair value of previously held equity method investments	40,323
Contingent consideration	250
	$	133,517

The promissory notes have interest rates ranging from 3.67% to 4.67% and are payable in 12 to 16 quarterly installments ranging between April 30, 2026 and April 30, 2030. The expected cash payments under the promissory notes are fully funded as part of the deposit account described above.

Each EMI entity acquired is subject to a lookback provision (Revenue Clawback) which provides for the seller to reimburse the buyer should the trailing twelve month gross revenue calculated eighteen months following the respective closing dates falls below 95% of Target Gross Revenue (as defined in the respective agreements). Any contingent consideration owed will be settled through a reduction of the respective promissory note. If the amount of the adjustment is greater than the amount owed under the respective promissory note, a payment is owed from the respective seller. These Revenue Clawbacks are contingent consideration which values will be adjusted to fair value each subsequent reporting period.

The following table summarizes the estimated fair values of the assets acquired, liabilities assumed, and non-controlling interest for the EMI Entities as of the various closing dates:


	Estimated Fair Value
Cash and cash equivalents	$	1,595
Other current assets	23
Property and equipment, net	16
Operating lease right-of-use asset	654
Other assets	450
Goodwill, net	26,149
Identifiable intangible assets	132,284
Lease liabilities	(653)
Other liabilities	(1,706)
Total net assets acquired	$	158,812
Non-controlling interest	(25,295)
	$	133,517

The acquisitions of certain EMI Entities were accounted for as asset acquisitions and one transaction was accounted for as a business combination. For the business combination transaction, the excess of the purchase price and the fair value of the non-controlling interest over the tangible and intangible assets acquired and liabilities assumed has been recorded as goodwill. The Company has assigned the goodwill to its Investment Advisors reportable segment. The resulting goodwill is primarily due to the perceived growth potential of the acquired business, plus the fair value of the assembled workforce. Any goodwill generated for income tax purposes from the acquisition is fully deductible.

The results of operations for the acquired EMI Entities are included in the consolidated financial statements of the Company from the date of the acquisition.

The Company has identified the following significant intangible assets acquired: trade names, unpatented technology, client relationships, and non-compete agreements. The following table summarizes the estimated fair value of the significant identifiable intangible assets:


	Estimated Fair Value		Estimated Useful Life
Trade names	$	1,329	3 years
Unpatented technology	816		1 year
Client relationships	126,760		18 years
Non-compete agreements	3,379		6 years
Total identifiable intangible assets	$	132,284

The fair values of identifiable intangible assets were determined by using certain estimates and assumptions that are not observable in the market. Determining the useful life of an intangible asset also requires judgment, as different types of intangible assets will have different useful lives.

The fair value of the identified intangible assets and the non-controlling interests were determined using the same methodology and key assumptions as those disclosed in the Annual Report on Form 10-K for the year ended
December 31, 2025.

The acquisition of certain EMI Entities triggered a provision in the Stratos Acquisition agreement whereby the Company has a contractual right to receive additional amounts from the Stratos sellers based on the future performance of the acquired EMI Entities. The Company is entitled to an amount from the SEI-Eclipse non-controlling interest holders should there be an EBITDA shortfall at any of the EMI Entities. The amount of a shortfall is calculated on an entity-by-entity basis based on a stated multiple and the difference between the eighteen-month prior quarter annualized EBITDA less the closing date EBITDA. The amount payable under this EBITDA clawback is reduced by the amount of the promissory note forgiveness under the revenue based contingent consideration arrangement described above. The amount payable by the SEI-Eclipse non-controlling interest holders can be funded, at the election of the SEI-Eclipse non-controlling interest holder, through i) cash payment to the Company or ii) issuance of preferred units of SEI-Eclipse to the Company.

SWE Acquisition of Other Entities

After the first quarter 2026, SWE acquired other entities in addition to the EMI Entities. The Company accounted for these transactions in accordance with ASC 805. The total preliminary purchase consideration consisted of the following components:


	Purchase Consideration
Cash	$	13,460
Promissory notes to sellers	4,681
Total purchase consideration	$	18,141

The promissory notes have interest rates ranging from 4.00% to 5.00% and are payable in 8 to 16 quarterly installments ranging between January 30, 2028 and October 30, 2031.

The following table summarizes the preliminary estimated fair values of the assets acquired, liabilities assumed, and non-controlling interest for the other acquisitions:


	Estimated Fair Value
Cash and cash equivalents	$	329
Other current assets	11
Goodwill, net	10,936
Identifiable intangible assets	11,168
Other liabilities	(10)
Total net assets acquired	$	22,434
Non-controlling interest	(4,293)
	$	18,141

The Company has identified client relationships as the only significant identifiable intangible asset. The following table summarizes the preliminary fair value of the significant identifiable intangible asset:


	Estimated Fair Value		Estimated Useful Life
Client relationships	$	11,168	18 years
Total identifiable intangible assets	$	11,168

The provisional fair values of the client relationships were determined by using certain estimates and assumptions that are not observable in the market. Determining the useful life of an intangible asset also requires judgment. The Company has not finalized its accounting for any areas of the purchase price allocation related to these entities. As a result, the amounts presented in the table above are preliminary. The Company anticipates it will finalize its accounting during the fourth quarter of 2026. The Company will make adjustments to the purchase price allocation prior to completion of the measurement period, as required.

Note 13 – Goodwill and Intangible Assets

Goodwill

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


	Investment Managers		Investment Advisors		Institutional Investors		Investments in New Businesses		Total

Balance, December 31, 2025	$	55,247	$	218,571	$	62,712	$	18,459	$	354,989
Acquisitions	—		37,450		—		—		37,450

Foreign currency translation adjustments	(24)		—		(210)		—		(234)
Balance, September 30, 2026	$	55,223	$	256,021	$	62,502	$	18,459	$	392,205

Acquired Intangible Assets

The Company recognized $29,626 and $9,774 of amortization expense related to acquired intangible assets during the nine months ended September 30, 2026 and 2025, respectively. The increase in amortization expense was primarily due to intangible assets acquired through the acquisition of Stratos (See Note 12).

Capitalized Software

Capitalized software consists primarily of internal-use software developed for the Company's operating platforms. During the nine months ended September 30, 2026 and 2025, the Company capitalized $17,186 and $22,828 of software development costs and recognized $27,269 and $22,800 of amortization expense, respectively. There were no material impairments or changes in estimated useful lives during the period.

Note 14 – 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 the Company's revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the business segments for the three months ended September 30, 2026 and 2025:


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2026
Investment management fees from pooled investment products	$	241	$	38,526	$	62,169	$	14,448	$	524	$	115,908
Investment management fees from investment management agreements	—		957		77,170		51,776		5,726		135,629
Investment operations fees	222,548		635		35,955		26		—		259,164
Investment processing fees - PaaS	1,518		86,833		1,781		282		13		90,427
Investment processing fees - SaaS	4		22,732		1,041		1,680		564		26,021
Professional services fees	2,145		10,169		—		—		—		12,314
Account fees and other	9,361		587		7,262		2,426		2,944		22,580
Total revenues	$	235,817	$	160,439	$	185,378	$	70,638	$	9,771	$	662,043

Primary Geographic Markets:
United States	$	205,778	$	104,593	$	185,378	$	58,668	$	8,557	$	562,974
United Kingdom	—		37,062		—		6,851		1,214		45,127
Canada	—		12,657		—		1,555		—		14,212
Ireland	17,619		6,127		—		3,564		—		27,310
Luxembourg	12,420		—		—		—		—		12,420

Total revenues	$	235,817	$	160,439	$	185,378	$	70,638	$	9,771	$	662,043


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
Major Product Lines:	For the Three Months Ended September 30, 2025
Investment management fees from pooled investment products	$	163	$	34,797	$	57,724	$	12,640	$	406	$	105,730
Investment management fees from investment management agreements	—		1,057		59,871		53,633		5,253		119,814
Investment operations fees	195,737		629		20,739		21		14		217,140
Investment processing fees - PaaS	1,387		79,837		1,717		316		11		83,268
Investment processing fees - SaaS	—		22,076		1,282		1,809		621		25,788
Professional services fees	1,231		4,856		—		—		—		6,087
Account fees and other	8,532		742		6,132		3,407		1,871		20,684
Total revenues	$	207,050	$	143,994	$	147,465	$	71,826	$	8,176	$	578,511

Primary Geographic Markets:
United States	$	182,696	$	94,224	$	147,465	$	59,335	$	7,587	$	491,307
United Kingdom	66		33,355		—		8,894		589		42,904
Canada	—		10,943		—		1,577		—		12,520
Ireland	14,716		5,472		—		2,020		—		22,208
Luxembourg	9,572		—		—		—		—		9,572

Total revenues	$	207,050	$	143,994	$	147,465	$	71,826	$	8,176	$	578,511

The following tables provide additional information pertaining to the Company's revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Company’s business segments for the nine months ended September 30, 2026 and 2025:


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2026
Investment management fees from pooled investment products	$	697	$	110,923	$	180,372	$	41,958	$	1,429	$	335,379
Investment management fees from investment management agreements	—		2,897		218,223		154,967		16,725		392,812
Investment operations fees	647,145		1,892		104,573		66		12		753,688
Investment processing fees - PaaS	4,399		257,880		5,232		1,107		35		268,653
Investment processing fees - SaaS	4		68,120		3,197		5,183		1,294		77,798
Professional services fees	6,409		25,940		—		—		—		32,349
Account fees and other	25,559		1,928		21,373		8,575		7,729		65,164
Total revenues	$	684,213	$	469,580	$	532,970	$	211,856	$	27,224	$	1,925,843

Primary Geographic Markets:
United States	$	598,734	$	307,587	$	532,970	$	174,806	$	24,270	$	1,638,367
United Kingdom	57		108,024		—		22,352		2,954		133,387
Canada	—		36,561		—		4,630		—		41,191
Ireland	51,226		17,408		—		10,068		—		78,702
Luxembourg	34,196		—		—		—		—		34,196

Total revenues	$	684,213	$	469,580	$	532,970	$	211,856	$	27,224	$	1,925,843


	Investment Managers		Private Banks		Investment Advisors		Institutional Investors		Investments In New Businesses		Total
Major Product Lines:	For the Nine Months Ended September 30, 2025
Investment management fees from pooled investment products	$	385	$	98,093	$	166,903	$	36,161	$	1,203	$	302,745
Investment management fees from investment management agreements	—		3,077		165,862		158,383		15,036		342,358
Investment operations fees	560,970		1,871		62,296		48		1,999		627,184
Investment processing fees - PaaS	4,003		234,617		4,577		1,524		31		244,752
Investment processing fees - SaaS	—		65,742		4,075		5,545		12,886		88,248
Professional services fees	4,056		17,644		—		—		1,614		23,314
Account fees and other	24,751		2,113		17,521		8,014		8,456		60,855
Total revenues	$	594,165	$	423,157	$	421,234	$	209,675	$	41,225	$	1,689,456

Primary Geographic Markets:
United States	$	524,823	$	280,629	$	421,234	$	174,508	$	39,816	$	1,441,010
United Kingdom	220		95,764		—		24,705		1,409		122,098
Canada	—		31,269		—		4,521		—		35,790
Ireland	43,116		15,495		—		5,941		—		64,552
Luxembourg	26,006		—		—		—		—		26,006

Total revenues	$	594,165	$	423,157	$	421,234	$	209,675	$	41,225	$	1,689,456

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 fees from client cash balances held in the FDIC-insured accounts through the SEI Integrated Cash program. Fees are based on client cash balances held in FDIC insured deposit accounts through a network of independent banks and are dependent on the prevailing market interest rates. The amount recognized is net of amounts paid to clients for their swept deposits.

Stratos provides a suite of infrastructure and operational support services to independent advisors. These services include practice management coaching, compliance and regulatory oversight, billing and administrative support, technology access, and marketing resources. Fees are primarily earned based on an agreed-upon percentage of qualified assets under management.

Revenues associated with Investment operations fees 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.

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 former clients of the Investments in New Businesses segment processed on the Archway PlatformSM were fees for hosted technology services formerly offered 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 was 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.

Note 15 – Consolidated Variable Interest Entities

On July 31, 2025, the Company made a seed capital investment of $50,000 through a subscription agreement with the LSV Global Equity Market Neutral Fund, LP (LSV GEMNF), a limited partnership fund that was operationalized on July 1, 2025. LSV serves as the general partner and investment manager to the LSV GEMNF and makes all operational and investment decisions on behalf of the fund. LSV does not have a partnership interest in the LSV GEMNF.

The Company determined the LSV GEMNF to be a variable interest entity (VIE) in which it has a variable interest through its direct equity partnership interest and also determined LSV does not have a variable interest through its management fee as general partner to the fund. The Company concluded that it is the primary beneficiary as substantially all of the activities of the fund are currently conducted on behalf of the Company while the fund is in the seed capital stage and is therefore required to consolidate the accounts of the LSV GEMNF into its financial statements.

The Company recognized unrealized gains of $8,188 and $1,463 during the nine months ended September 30, 2026 and 2025, respectively, from the change in fair value of the seed capital investment in the LSV GEMNF. These gains are included in Net gain from consolidated variable interest entities on the accompanying Consolidated Statement of Operations.

The assets and liabilities of the LSV GEMNF presented on the accompanying Consolidated Balance Sheets consist of:


Assets of Consolidated Variable Interest Entities	September 30, 2026		December 31, 2025
Cash and cash equivalents	$	85,457	$	70,791
Equity securities	135,268		113,119
Due from broker for securities sold	3,017		—
Other assets	43		84
Total	$	223,785	$	183,994


Liabilities of Consolidated Variable Interest Entities	September 30, 2026		December 31, 2025
Accrued expenses	$	35	$	28
Securities sold short	131,408		108,243
Due to broker for securities purchased	5,093		233

Total	$	136,536	$	108,504

The assets presented in the table above may only be used to settle obligations of the LSV GEMNF and are not available for use by the Company to the extent they are held by non-controlling interests. Any debt or liabilities of the LSV GEMNF have no recourse to the Company’s general credit.

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, 2025.

Overview

Consolidated Summary

SEI Investments Company is a leading global provider of financial technology, operations, and asset management services within the financial services industry. 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 September 30, 2026, through our subsidiaries and partnerships in which we have a significant interest, we manage, advise or administer $2.1 trillion in hedge, private equity, mutual fund and pooled or separately managed assets.

Condensed Consolidated Statements of Operations for the three and nine months ended September 30, 2026 and 2025 were:


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Revenues	$	662,043	$	578,511	14%	$	1,925,843	$	1,689,456	14%
Expenses	464,044		418,550		11%	1,341,342		1,223,763		10%
Income from operations	197,999		159,961		24%	584,501		465,693		26%
Net gain from investments	1,206		1,992		(39)%	4,387		4,244		3%
Interest income, net of interest expense	6,260		10,098		(38)%	19,399		29,325		(34)%
Gain on sale of business	—		—		NM	—		94,412		NM
Other (expense) income	(32,500)		4,922		NM	(32,050)		9,422		NM
Equity in earnings of unconsolidated affiliates	39,819		31,903		25%	110,989		94,290		18%
Net gain from consolidated variable interest entities	1,809		1,845		NM	11,363		1,845		NM
Income before income taxes	214,593		210,721		2%	698,589		699,231		—%
Income taxes	43,346		46,135		(6)%	151,015		156,045		(3)%
Net income	171,247		164,586		4%	547,574		543,186		1%
Less: Net income attributable to non-controlling interests	2,989		382		NM	9,171		382		NM
Net income attributable to SEI Investments Company	$	168,258	$	164,204	2%	$	538,403	$	542,804	(1)%
Diluted earnings per common share	$	1.38	$	1.30	6%	$	4.37	$	4.25	3%

The following items had a significant impact on our financial results for the three and nine months ended September 30, 2026 and 2025:

•Revenue from Assets under management, administration, and distribution fees increased in the first nine months of 2026 primarily from higher assets under administration due to cross sales to existing alternative investment clients of the Investment Managers segment as well as new sales within the segment. Average assets under administration increased $212.8 billion, or 19%, to $1.3 trillion during the first nine months of 2026, as compared to $1.1 trillion during the first nine months of 2025.

•Revenue from Assets under management, administration, and distribution fees also increased from market appreciation and positive cash flows into separately managed account programs and Strategist programs of the Investment Advisors segment. This was partially offset by negative cash flows and lower fee structures from SEI fund programs and fee reductions in separately managed account programs. Average assets under management

in equity and fixed income programs, excluding LSV, increased $25.7 billion, or 14%, to $212.6 billion in the first nine months of 2026 as compared to $186.9 billion during the first nine months of 2025.

•Revenues from the Stratos acquisition contributed $126.7 million during the first nine months of 2026.

•Revenue from Information processing and software servicing fees increased in the first nine months of 2026 primarily from new client conversions and growth from existing SEI Wealth PlatformSM (SWP) clients.

•Earnings from LSV increased to $109.9 million in the first nine months of 2026 as compared to $94.3 million in the first nine months of 2025 due to market appreciation of assets under management and increased performance fees. Negative cash flows from existing clients and client losses partially offset the increase in earnings from LSV.

•Operating expenses increased primarily from compensation, benefits and other personnel costs and higher direct costs reflected in subadvisory, distribution and other asset management costs. The increase in personnel costs was largely attributable to business growth, primarily in the Investment Managers segment. This increase was partially offset by lower costs for consulting and outsourced vendor costs supporting operations in the Investment Managers and Private Banks segments.

•Operating expenses also increased due to the Stratos acquisition in December 2025. The incremental expenses primarily consisted of personnel costs and amortization of acquired intangible assets.

•Capitalized software development costs were $17.2 million in the first nine months of 2026, of which $11.2 million was for continued enhancements to SWP. Capitalized software development costs also include $6.0 million of software development costs in the first nine months of 2026 for SEI Scope, a new platform for the Investment Managers segment placed into service during the third quarter 2025.

•Amortization expense of capitalized software development costs related to SWP was $22.7 million in the first nine months of 2026 as compared to $21.6 million in the first nine months of 2025. Amortization expense related to the SEI Scope platform was $4.5 million in the first nine months of 2026.

•Other expense consists of a charge of $32.5 million during the third quarter 2026 related to a termination agreement with Stratos (See Note 12 to the Consolidated Financial Statements).

•SEI repurchased 5.9 million shares of common stock for $535.8 million in the first nine months of 2026.

Stratos Wealth Holdings

In December 2025, we completed our strategic investment in the Stratos business (Stratos), a network of affiliated companies focused on supporting the success of financial advisors. During 2026, we completed the purchases of 100% interests of nine entities and a majority interest in two additional entities and also acquired other entities. Stratos contributed $126.7 million to revenue and $10.5 million to operating profit during the first nine months of 2026, which includes $20.1 million of expense associated with acquired intangible amortization, before considering non-controlling interest (See Note 12 to the Notes to Consolidated Financial Statements).

Ending Asset Balances

(In millions)


	As of September 30,				Percent Change
	2026		2025
Investment Managers:
Collective trust fund programs (A)	$	267,693	$	237,964	12%
Liquidity funds	493		418		18%
Total assets under management	$	268,186	$	238,382	13%
Client assets under administration	1,400,810		1,204,843		16%
Total assets	$	1,668,996	$	1,443,225	16%
Private Banks:
Equity and fixed-income programs	$	32,949	$	28,408	16%
Collective trust fund programs	4		3		33%
Liquidity funds	1,646		2,802		(41)%
Total assets under management	$	34,599	$	31,213	11%
Client assets under administration	9,784		8,902		10%
Total assets	$	44,383	$	40,115	11%
Investment Advisors:
Equity and fixed-income programs	$	94,470	$	85,245	11%
Liquidity funds	3,306		3,391		(3)%
Total Platform assets under management	$	97,776	$	88,636	10%
Platform-only assets	38,464		32,152		20%
Platform-only assets-deposit program	2,326		2,165		7%
Total Platform assets	$	138,566	$	122,953	13%
Institutional Investors:
Equity and fixed-income programs	$	84,533	$	82,676	2%
Liquidity funds	1,485		1,580		(6)%
Total assets under management	$	86,018	$	84,256	2%
Client assets under advisement	3,776		6,564		(42)%
Total assets	$	89,794	$	90,820	(1)%
Investments in New Businesses:
Equity and fixed-income programs	$	3,289	$	2,999	10%
Liquidity funds	404		244		66%
Total assets under management	$	3,693	$	3,243	14%
Client assets under advisement	2,613		2,452		7%

Total assets	$	6,306	$	5,695	11%
LSV:
Equity and fixed-income programs (B)	$	116,080	$	95,801	21%

Stratos (E)	$	41,655	$	—	NM


Total:
Equity and fixed-income programs (C)	$	331,321	$	295,129	12%
Collective trust fund programs	267,697		237,967		12%
Liquidity funds	7,334		8,435		(13)%
Total assets under management	$	606,352	$	541,531	12%
Client assets under advisement	6,389		9,016		(29)%
Client assets under administration (D)	1,410,594		1,213,745		16%
Platform-only assets	40,790		34,317		19%
Stratos	41,655		—		NM
Total assets	$	2,105,780	$	1,798,609	17%

(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 $1.4 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 September 30, 2026).

(C) Equity and fixed-income programs include $9.0 billion of assets invested in various asset allocation funds at September 30, 2026.

(D) In addition to the assets presented, SEI also administers an additional $16.1 billion in Funds of Funds assets on which SEI does not earn an administration fee (as of September 30, 2026).

(E) Stratos is a network of affiliated companies that provides financial services to $41.7 billion in client assets across business models and affiliation structures (as of September 30, 2026).

Average Asset Balances

(In millions)


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Investment Managers:
Collective trust fund programs (A)	$	267,834	$	231,088	16%	$	258,780	$	218,298	19%
Liquidity funds	569		385		48%	547		310		76%
Total assets under management	$	268,403	$	231,473	16%	$	259,327	$	218,608	19%
Client assets under administration	1,386,909		1,174,961		18%	1,333,373		1,111,723		20%
Total assets	$	1,655,312	$	1,406,434	18%	$	1,592,700	$	1,330,331	20%
Private Banks:
Equity and fixed-income programs	$	33,201	$	28,051	18%	$	31,967	$	26,826	19%
Collective trust fund programs	4		3		33%	4		3		33%
Liquidity funds	1,680		2,834		(41)%	1,849		2,855		(35)%
Total assets under management	$	34,885	$	30,888	13%	$	33,820	$	29,684	14%
Client assets under administration	9,602		8,665		11%	9,446		8,473		11%
Total assets	$	44,487	$	39,553	12%	$	43,266	$	38,157	13%
Investment Advisors:
Equity and fixed-income programs	$	95,439	$	82,735	15%	$	92,089	$	78,884	17%
Liquidity funds	3,292		3,378		(3)%	3,383		3,320		2%
Total Platform assets under management	$	98,731	$	86,113	15%	$	95,472	$	82,204	16%
Platform-only assets	38,662		30,874		25%	36,638		28,034		31%
Platform-only assets-deposit program	2,297		2,136		8%	2,293		2,158		6%
Total Platform assets	$	139,690	$	119,123	17%	$	134,403	$	112,396	20%
Institutional Investors:
Equity and fixed-income programs	$	86,212	$	80,802	7%	$	85,302	$	78,379	9%
Liquidity funds	1,700		1,810		(6)%	1,781		1,773		—%
Total assets under management	$	87,912	$	82,612	6%	$	87,083	$	80,152	9%
Client assets under advisement	3,852		6,274		(39)%	3,737		5,952		(37)%
Total assets	$	91,764	$	88,886	3%	$	90,820	$	86,104	5%
Investments in New Businesses:
Equity and fixed-income programs	$	3,317	$	2,934	13%	$	3,228	$	2,822	14%
Liquidity funds	407		255		60%	328		258		27%
Total assets under management	$	3,724	$	3,189	17%	$	3,556	$	3,080	15%
Client assets under administration (E)	—		—		—%	—		9,849		(100)%
Client assets under advisement	2,632		2,428		8%	2,464		2,321		6%
Total assets	$	6,356	$	5,617	13%	$	6,020	$	15,250	(61)%
LSV:
Equity and fixed-income programs (B)	$	118,889	$	92,969	28%	$	113,123	$	90,060	26%

Stratos (F)	$	41,902	$	—	NM	$	40,593	$	—	NM


Total:
Equity and fixed-income programs (C)	$	337,058	$	287,491	17%	$	325,709	$	276,971	18%
Collective trust fund programs	267,838		231,091		16%	258,784		218,301		19%
Liquidity funds	7,648		8,662		(12)%	7,888		8,516		(7)%
Total assets under management	$	612,544	$	527,244	16%	$	592,381	$	503,788	18%
Client assets under advisement	6,484		8,702		(25)%	6,201		8,273		(25)%
Client assets under administration (D)	1,396,511		1,183,626		18%	1,342,819		1,130,045		19%
Platform-only assets	40,959		33,010		24%	38,931		30,192		29%
Stratos	41,902		—		NM	40,593		—		NM
Total assets	$	2,098,400	$	1,752,582	20%	$	2,020,925	$	1,672,298	21%

(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 September 30, 2026 was $1.4 billion.

(C) Equity and fixed-income programs include $8.9 billion of average assets invested in various asset allocation funds for the three months ended September 30, 2026.

(D) In addition to the assets presented, SEI also administers an additional $15.2 billion of average assets in Funds of Funds assets for the three months ended September 30, 2026 on which SEI does not earn an administration fee.

(E) Client assets under administration related to the Family Office Services business divested on June 30, 2025.

(F) Stratos is a network of affiliated companies that provides financial services to $41.9 billion in average client assets across business models and affiliation structures during the three months ended September 30, 2026.

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.

Business Segments

Revenues, Expenses and Operating Profit (Loss) for our business segments for the three and nine months ended September 30, 2026 compared to the three and nine months ended September 30, 2025 were as follows:


	Three Months Ended September 30,						Percent Change	Nine Months Ended September 30,						Percent Change
	2026			2025				2026			2025
Investment Managers:
Revenues	$	235,817		$	207,050		14%	$	684,213		$	594,165		15%
Expenses	143,562			125,934			14%	413,479			364,781			13%
Operating Profit	$	92,255		$	81,116		14%	$	270,734		$	229,384		18%
Operating Margin	39		%	39		%		40		%	39		%
Private Banks:
Revenues	$	160,439		$	143,994		11%	$	469,580		$	423,157		11%
Expenses	128,275			120,763			6%	373,526			354,236			5%
Operating Profit	$	32,164		$	23,231		38%	$	96,054		$	68,921		39%
Operating Margin	20		%	16		%		20		%	16		%
Investment Advisors:
Revenues	$	185,378		$	147,465		26%	$	532,970		$	421,234		27%
Expenses	107,678			79,128			36%	305,901			227,384			35%
Non-controlling interest and other, net	2,034			—			NM	4,732			—			NM
Operating Profit	$	75,666		$	68,337		11%	$	222,337		$	193,850		15%
Operating Margin	41		%	46		%		42		%	46		%
Institutional Investors:
Revenues	$	70,638		$	71,826		(2)%	$	211,856		$	209,675		1%
Expenses	37,801			38,068			(1)%	111,764			109,795			2%
Operating Profit	$	32,837		$	33,758		(3)%	$	100,092		$	99,880		—%
Operating Margin	46		%	47		%		47		%	48		%
Investments in New Businesses:
Revenues	$	9,771		$	8,176		20%	$	27,224		$	41,225		(34)%
Expenses	10,588			11,863			(11)%	29,820			48,789			(39)%
Operating Loss	$	(817)		$	(3,687)		(78)%	$	(2,596)		$	(7,564)		(66)%

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

Investment Managers

Revenues increased $28.8 million, or 14%, in the three month period and increased $90.0 million, or 15%, in the nine month period ended September 30, 2026 and were primarily affected by:

•Increased administration fees 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 remained at 39% in the three month period ended and increased to 40% compared to 39% in the nine month period. Operating income increased $11.1 million, or 14%, in the three month period and increased $41.4 million, or 18%, in the nine month period and was primarily affected by:

•An increase in revenues as mentioned above; partially offset by

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

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

Private Banks


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Revenues:
Information processing and software servicing fees	$	120,298	$	107,405	12%	$	353,802	$	319,829	11%
Asset management, administration & distribution fees	40,141		36,589		10%	115,778		103,328		12%
Total revenues	$	160,439	$	143,994	11%	$	469,580	$	423,157	11%

Revenues increased $16.4 million, or 11%, in the three month period and increased $46.4 million, or 11%, in the nine month period ended September 30, 2026 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

•Negative cash flows and fee reductions from existing international clients; and

•Lower investment processing fees from the recontracting of existing clients and client losses.

Operating margins increased to 20% compared to 16% in the three month period and increased to 20% compared to 16% in the nine month period. Operating income increased $8.9 million, or 38%, in the three month period and increased $27.1 million, or 39%, in the nine month period and was primarily affected by:

•An increase in revenues as mentioned above; partially offset by

•Increased costs, mainly personnel, technology and third-party vendor costs supporting operations.

Investment Advisors


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Revenues:
Investment management fees-SEI fund programs	$	62,169	$	57,724	8%	$	180,372	$	166,903	8%
Separately managed account fees	77,170		59,871		29%	218,223		165,862		32%
Other fees	46,039		29,870		54%	134,375		88,469		52%
Total revenues	$	185,378	$	147,465	26%	$	532,970	$	421,234	27%

Revenues increased $37.9 million, or 26%, in the three month period and increased $111.7 million, or 27%, in the nine month period ended September 30, 2026 and were primarily affected by:

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

•Revenues from Stratos acquisition of $126.7 million; 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; and

•Lower fee structures in SEI fund programs and fee reductions in our separately managed account programs.

Operating margin decreased to 41% compared to 46% in the three month period and decreased to 42% compared to 46% in the nine month period. Operating income increased $7.3 million, or 11%, in the three month period and increased $28.5 million, or 15%, in the nine month period and was primarily affected by:

•An increase in revenues as mentioned above; partially offset by

•Increased amortization expense from intangible assets related to the Stratos acquisition;

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

•Increased personnel costs from business growth.

Institutional Investors

Revenues decreased $1.2 million, or 2%, in the three month period and increased $2.2 million, or 1%, in the nine month period ended September 30, 2026 and were primarily affected by:

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

•Increased fees from new and existing Outsourced Chief Investment Officer (OCIO) platform clients; partially offset by

•Decreased investment management fees from client losses.

Operating margin decreased to 46% compared to 47% in the three month period and decreased to 47% compared to 48% in the nine month period. Operating income decreased $921 thousand, or 3%, in the three month period and increased slightly in the nine month period and was primarily affected by:

•An increase in revenues as mentioned above; and

•Decreased personnel costs; partially offset by

•Increased direct expenses associated with investment management fees.

Investments in New Businesses


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Revenues:
SEI Private Wealth Management	$	6,323	$	5,796	9%	$	18,378	$	16,468	12%
SEI Family Office Services	—		—		NM	—		18,002		(100)%
Other	3,448		2,380		45%	8,846		6,755		31%
Total revenues	$	9,771	$	8,176	20%	$	27,224	$	41,225	(34)%

Revenues increased $1.6 million, or 20%, in the three month period and decreased $14.0 million, or 34%, in the nine month period ended September 30, 2026 and were primarily affected by:

•The divestiture of the SEI Family Office Services business in June 2025; partially offset by

•Increased revenues from SEI Private Wealth Management through higher assets under advisement due to market appreciation and new business.

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 $36.1 million and $42.8 million in the three months ended September 30, 2026 and 2025, respectively, and $106.9 million and $118.8 million in the nine months ended September 30, 2026 and 2025, respectively. The decline in corporate overhead expenses was primarily due to lower personnel costs and professional fees.

Other income and expense

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


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Net gain from investments	$	1,206	$	1,992	$	4,387	$	4,244
Interest and dividend income	6,866		10,207		21,040		29,711
Interest expense	(606)		(109)		(1,641)		(386)
Gain on sale of business	—		—		—		94,412
Other (expense) income	(32,500)		4,922		(32,050)		9,422
Equity in earnings of unconsolidated affiliates	39,819		31,903		110,989		94,290
Net gain from consolidated variable interest entities	1,809		1,845		11,363		1,845
Total other income and expense items, net	$	16,594	$	50,760	$	114,088	$	233,538

Net gain from investments

Net gain from investments in the three and nine months ended September 30, 2026 was primarily due to unrealized mark-to-market gains recorded in current earnings associated with Company-sponsored investment funds and other investments from market appreciation in 2026 (See Notes 2 and 5 to the Consolidated Financial Statements).

Interest and dividend income

Interest and dividend income is earned based upon the amount of cash that is invested daily. The decrease in interest and dividend income in the three and nine months ended September 30, 2026 was due to lower invested cash balances and, to a lesser extent, an overall decline in interest rates.

Other (expense) income

Other expense in the three and nine months ended September 30, 2026 is primarily related to a charge resulting from a termination agreement with Stratos during the third quarter 2026 (See Note 12 to the Consolidated Financial Statements).

Equity in earnings of unconsolidated affiliates

Equity in earnings of unconsolidated affiliates primarily includes the earnings from our ownership interest in LSV. The table below presents the revenues and net income of LSV and the proportionate share in LSV's earnings.


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Revenues of LSV	$	136,559	$	111,750	22%	$	392,867	$	325,894	21%
Net income of LSV	102,995		82,812		24%	285,794		244,639		17%

SEI's proportionate share in earnings of LSV	$	39,590	$	31,903	24%	$	109,946	$	94,290	17%

The increase in earnings from LSV in the three and nine months ended September 30, 2026 was primarily due to market appreciation of assets under management. An increase in performance fees in the second quarter 2026 also positively impacted our earnings from LSV. Negative cash flows from existing clients and client losses partially offset the increase in earnings. Average assets under management by LSV increased $23.1 billion to $113.1 billion during the nine months ended September 30, 2026 as compared to $90.1 billion during the nine months ended September 30, 2025, an increase of 26%.

Our total partnership interest in LSV was approximately 38.4% as of September 30, 2026 (See Note 2 to the Consolidated Financial Statements).

Net gain from consolidated variable interest entities

Net gain from consolidated variable interest entities in the three and nine months ended September 30, 2026 reflects the total net gains of the LSV Global Market Neutral Fund LP consolidated into our financial statements. The portion of this gain associated with our investment in the fund was $8.2 million and $1.5 million during the nine months ended September 30, 2026 and 2025, respectively (See Notes 1 and 15 to the Consolidated Financial Statements).

Amortization

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


	Three Months Ended September 30,				Percent Change	Nine Months Ended September 30,				Percent Change
	2026		2025			2026		2025
Capitalized software development costs	$	9,080	$	8,405	8%	$	27,269	$	22,800	20%
Intangible assets acquired through acquisitions and asset purchases	10,494		3,168		231%	29,626		9,774		203%
Other	$	110	$	339	(68)%	280		497		(44)%
Total amortization expense	$	19,684	$	11,912	65%	$	57,175	$	33,071	73%

Capitalized software development costs

The increase in amortization expense related to capitalized software development costs during the three and nine months ended September 30, 2026 was due to significant enhancements to SWP and the placement into service of SEI Scope during the third quarter 2025 (See Note 1 to the Consolidated Financial Statements).

Intangible assets acquired through acquisitions and asset purchases

The increase in amortization expense related to intangible assets during the three and nine months ended September 30, 2026 was due to intangible assets related to the Stratos acquisition (See Note 12 to the Consolidated Financial Statements).

Income Taxes


	Three Months Ended September 30,						Percent Change	Nine Months Ended September 30,						Percent Change
	2026			2025				2026			2025
Provision for income taxes	$	43,346		$	46,135		(6)%	$	151,015		$	156,045		(3)%

Effective income tax rate	20.2		%	21.9		%		21.6		%	22.3		%

The decrease in the effective tax rate for the three and nine months ended September 30, 2026 was primarily due to higher excess tax benefits recognized on employee stock option exercises and the favorable impact of purchased energy tax credits, both of which reduced the Company's income tax expense.

Stock-Based Compensation

We recognized $46.8 million and $42.0 million in stock-based compensation expense during the nine months ended September 30, 2026 and 2025, respectively. 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 $16.0 million in stock-based compensation expense during the remainder of 2026.

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 (CBI), the Commission de Surveillance du Secteur Financier of the Grand Duchy of Luxembourg (CSSF), 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. 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 or with certain restrictions, 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.

Non-GAAP Information and Reconciliation

We present certain non‑GAAP financial measures to supplement the consolidated financial statements prepared in accordance with GAAP. Management believes these measures provide useful information to investors by enhancing the understanding of our core operating performance and facilitating comparisons across reporting periods. These non‑GAAP measures are also used by our management to evaluate operating results, allocate resources, and assess performance against strategic objectives.

These non-GAAP financial measures should be viewed in addition to, and not as a substitute for, reported results prepared in accordance with GAAP.

The following schedules reconcile U.S. GAAP Net income attributable to SEI Investments Company and Income from operations on the accompanying Consolidated Statements of Operations for the three and nine months ended September 30, 2026 and 2025:


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Net income attributable to SEI Investments Company (U.S. GAAP basis)	$	168,258	$	164,204	$	538,403	$	542,804
Non-GAAP adjustments:
Acquisition-related:
Third party costs(1)	—		3,767		—		4,587
Intangible assets amortization & impairments(2)	7,379		3,168		21,070		9,774

Total acquisition-related	7,379		6,935		21,070		14,361
Gain on sale of asset/business(3)	—		—		—		(94,412)
Litigation settlements and insurance proceeds(4)	—		(4,350)		3,808		(8,850)


Other individually significant items(5)	32,500		—		32,500		—
Income tax effect(6)	(8,167)		(567)		(12,058)		19,787
Adjusted net income attributable to SEI Investments Company (non-GAAP basis)	$	199,970	$	166,222	$	583,723	$	473,690

Diluted earnings per common share (U.S. GAAP basis)	$	1.38	$	1.30	$	4.37	$	4.25
Adjusted diluted earnings per common share (non-GAAP basis)	$	1.64	$	1.32	4.73		3.71
Diluted weighted average shares outstanding	122,012		126,325		123,280		127,684


	Three Months Ended September 30,				Nine Months Ended September 30,
	2026		2025		2026		2025
Income from operations (U.S. GAAP Basis)	197,999		159,961		584,501		465,693
Non-GAAP adjustments:
Acquisition-related:
Third party costs(1)	—		3,767		—		4,587
Intangible assets amortization & impairments(2)	10,494		3,168		29,626		9,774
Total acquisition-related	10,494		6,935		29,626		14,361

Adjusted income from operations (non-GAAP Basis)	$	208,493	$	166,896	$	614,127	$	480,054

(1) This non-GAAP adjustment removes incremental and directly attributable costs incurred to execute acquisitions, such as third-party advisory, legal, accounting, valuation, and due diligence. For the three and nine months ended September 30, 2025, this non-GAAP adjustment consisted of the legal costs, advisory fees, and due diligence fees in relation to the Stratos acquisition. Management believes adjusting for these charges helps the reader's ability to understand our core operating results and increases comparability quarter to quarter.

(2) This non-GAAP adjustment removes the impact of amortization expense associated with acquired intangible assets (e.g., customer relationships, technology, trade names). This non-GAAP adjustment removes only amortization recorded in the current period related to acquired intangibles from prior acquisitions. The non-GAAP adjustments in 2026 include the amortization of the acquired intangibles from the Stratos acquisition, which closed in December 2025. Management included the Stratos related amortization expense net of the 42.5% NCI adjustment for the adjusted EPS calculation. However, this adjustment is not inclusive of the NCI portion for adjusted income from operations. The associated revenues are not adjusted. Management believes adjusting for these charges helps the reader's ability to understand our core operating results and increases comparability quarter to quarter.

(3) This non-GAAP adjustment removes realized gains on the sale of assets owned or entities under our control, out of the normal course of business. For the nine months ended September 30, 2025, the adjustment consisted of the realized gain from the sale of Family Office Services (FOS). Management believes adjusting for these gains helps the reader's ability to understand our core operating results and increases comparability quarter to quarter.

(4) This non-GAAP adjustment removes individually significant litigation settlements and insurance proceeds. For the nine months ended September 30, 2026, this non-GAAP adjustment was related to litigation settlements. For the three and nine months ended September 30, 2025, the non-GAAP adjustment consisted of a $4.5M settlement related to a vendor matter and a $4.4M insurance settlement. Management included these transactions as non-GAAP adjustments since they were out of the normal course of business. Management believes adjusting for these items helps the reader's ability to understand our core operating results and increases comparability quarter to quarter.

(5) This non-GAAP adjustment removes other items that are individually significant and highly unusual. For the three and nine months ended September 30, 2026, this non-GAAP adjustment consisted of the amount recognized related to the mutually agreed Termination Agreement between the Company and Stratos with respect to the previously reported obligations to proceed with the closing of the purchase of the equity of a Mexican RIA owned by Stratos. Management believes this charge is outside the normal course of business and not indicative of ongoing operating performance. Excluding this item enhances comparability between periods and assists investors in evaluating SEI's core operating results.

(6) Income tax effects are presented as a separate reconciling item (not netted within each adjustment). For performance measures, the tax effect reflects current and deferred tax expense commensurate with the adjusted measure of profitability. The methodology used (e.g., statutory rate, effective rate, or discrete item approach) is consistently applied. All of the above items use a systematic approach.

Liquidity and Capital Resources


	Nine Months Ended September 30,
	2026		2025
Net cash provided by operating activities	$	565,327	$	481,264
Net cash (used in) provided by investing activities	(32,087)		40,497
Net cash used in financing activities	(512,509)		(516,474)
Effect of exchange rate changes on cash and cash equivalents	(6,103)		11,953
Net change in cash and cash equivalents and cash and cash equivalents held at consolidated variable interest entities	14,628		17,240
Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, beginning of period	470,595		840,193
Cash, cash equivalents and cash and cash equivalents held at consolidated variable interest entities, end of period	$	485,223	$	857,433

Our credit facility provides for borrowings up to $500.0 million and is scheduled to expire in August 2030 (See Note 6 to the Consolidated Financial Statements). As of October 20, 2026, we had outstanding letters of credit of $4.6 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 2026. As of October 20, 2026, the amount of the credit facility available for corporate purposes was $495.4 million.

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 in commercial paper and SEI-sponsored money market mutual funds denominated in the U.S. dollar. We also utilize demand deposit accounts or money market accounts at several well-established financial institutions located in the United States. Accounts used to manage these excess cash reserves do not impose any restrictions or limitations that would prevent us from being able to access such cash amounts immediately. As of October 20, 2026, the amount of cash and cash equivalents considered free and immediately accessible for other general corporate purposes was $217.4 million.

Cash and cash equivalents include cash of $85.5 million held in accounts of the LSV Global Equity Market Neutral Fund, LP consolidated into our financial statements and may only be used to settle obligations of the fund (See Note 15 to the Consolidated Financial Statements).

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

Cash flows from operations increased $84.1 million in the first nine months of 2026 compared to the first nine months of 2025 primarily from increased distributions received from unconsolidated affiliates and non-cash adjustments. The increase in cash flows from operations was partially offset by the negative change in working capital accounts.

Net cash from investing activities includes:

•Purchases, sales and maturities of marketable securities. Purchases, sales and maturities of marketable securities in the first nine months of 2026 and 2025 were as follows:


	Nine Months Ended September 30,
	2026		2025
Purchases	$	(152,089)	$	(123,708)
Sales and maturities	156,962		93,367
Net investing activities from marketable securities	$	4,873	$	(30,341)

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 $17.2 million of software development costs in the first nine months of 2026 as compared to $22.8 million in the first nine months of 2025 related to significant enhancements for the expanded functionality of the SEI Wealth Platform and SEI Scope, a new platform for the Investment Managers segment.

•Capital expenditures. Capital expenditures in the first nine months of 2026 were $24.7 million as compared to $21.1 million in the first nine months of 2025. Expenditures in 2026 and 2025 include capital outlays for purchased software and equipment for data center operations.

Net cash from financing activities includes:

•The repurchase of common stock. We had total capital outlays of $532.8 million during the first nine months of 2026 and $527.5 million during the first nine months of 2025 for the repurchase of common stock.

•Proceeds from the issuance of common stock. We received $147.7 million and $115.9 million in proceeds from the issuance of common stock during the first nine months of 2026 and 2025, respectively, through our equity compensation plans. These proceeds were primarily from stock option exercise activity.

•Dividend payments. Cash dividends paid were $126.3 million in the first nine months of 2026 as compared to $123.3 million in the first nine months of 2025.

Cash Requirements

Cash requirements and liquidity needs are primarily funded through cash flow from operations and our capacity for additional borrowing. At September 30, 2026, 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, promissory notes, and other commitments. In addition, we also have $22.5 million in cash requirements from unfunded commitments to limited partnership funds. 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, expected M&A activity, 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:

•Market-driven risks related to capital market conditions, asset values, interest rates, market volatility, and investor sentiment;

•Client and relationship risks, including client attrition, unfavorable contract renewals, and loss of large clients;

•Fee compression and competitive pricing pressure across investment management and technology services;

•Product development and innovation risks, including delays, cost overruns, system issues, and failure of new offerings to gain market acceptance;

•Business model innovation and expansion risks, including entry into new markets or channels (e.g., direct-to-consumer);

•Market consolidation and competitive disruption from traditional competitors, fintechs, and large technology firms;

•Key personnel and broader human capital risks, including retention, workforce reductions, and talent availability;

•Outsourcing and offshoring strategy risks associated with the Global Capability Center in India;

•M&A execution and integration risks, including the Stratos acquisition and other strategic transactions;

•Dependence on third-party service providers, vendors, market infrastructure, sub-advisers, and pricing services;

•Process errors in fund accounting, investment operations, pricing, and other judgment-based or manual activities;

•Operational resilience risks, including business continuity and disaster recovery failures;

•Rapid growth and capacity constraints impacting cost structure, compliance, controls, cybersecurity, and scalability;

•Cybersecurity threats, including cyberattacks, data breaches, system failures, and third-party technology risks;

•Risks related to artificial intelligence, machine learning, and automation, including model risk, bias, and regulatory uncertainty;

•Tokenization risks, including regulatory uncertainty, cybersecurity, custody, valuation, liquidity, and smart contract risks;

•Open-source software risks, including security vulnerabilities and license compliance;

•Data privacy and protection risks related to handling sensitive personal and client data;

•Intellectual property risks involving protection of proprietary technology and infringement claims;

•System outages and downtime affecting platform availability, processing, and data integrity;

•Technology disruption, software defects, and development or implementation delays;

•Earnings volatility and cash flow exposure, including reliance on LSV Asset Management and strategic investments;

•Interest rate, currency, and tax law change risks affecting revenues, margins, and asset values;

•Covenant compliance risks under revolving credit facilities;

•Holding company structure risks, including restrictions on subsidiary cash distributions;

•Liquidity risk, particularly during market stress and in alternative investments;

•Investment performance risk and continued fee pressure across investment products;

•Insourcing of investment functions and increased operational complexity;

•Proprietary capital deployment risks and conflicts of interest;

•Fiduciary risk related to retirement plans, OCIO services, and competitive pressures;

•Regulatory changes and evolving compliance obligations across U.S. and global jurisdictions;

•Financial crime, sanctions, AML, and anti-corruption compliance risks;

•Privacy and data protection regulatory risk;

•Conflicts of interest involving clients, affiliates, directors, executives, and acquisitions;

•Litigation, regulatory examinations, and investigations;

•Shareholder activism and ESG-related scrutiny;

•Geopolitical instability, including wars, global tensions, and state-sponsored cyber activity;

•Unforeseen or catastrophic events, including pandemics, extreme weather, and natural disasters; and

•Climate change and ESG-related risks, including regulatory, reputational, and transition risks.

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, an institutional transfer agent registered with the SEC under the Securities Exchange Act of 1934.

•SEI Transfer Agency and Registry Services, or STARS, a retail 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, or FCA;

•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;

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

•SEI Investments - Guernsey Limited, a provider of custody, administration and reporting services that is regulated by the Guernsey Financial Services Commission.

In addition to the regulatory authorities listed above, our subsidiaries are subject to the jurisdiction of regulatory authorities in other foreign countries or jurisdictions. Further, in connection with our strategic investment in Stratos, we own 57.5% of the holding company that holds the equity of Stratos Wealth Securities, LLC, a limited purpose broker-dealer registered with the SEC under the Securities Exchange Act of 1934 and a member of FINRA, and the following SEC registered investment advisors:

•Stratos Wealth Advisors, LLC;

•Stratos Wealth Partners, Ltd.;

•Stratos Investment Management, LLC;

•Renaissance Investment Group, LLC; and

•Norland LLC.

In addition to our wholly-owned or majority-owned subsidiaries, we also own a minority interest of approximately 38.4% in LSV, which is also an investment advisor registered with the SEC.

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

The various governmental agencies and self-regulatory authorities that regulate or supervise the Company and its subsidiaries have broad administrative powers. In the event of a failure to comply with laws, regulations, and requirements of these agencies and authorities, or to meet regulator expectations, 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 or a direction that we comply with certain restrictions, 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 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, 2025. There have been no material changes to this information as it is disclosed in our Annual Report on Form 10-K for 2025.

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 September 30, 2026 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

PART II – OTHER INFORMATION

Item 1. Legal Proceedings.

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

Item 1A. Risk Factors.

Information regarding risk factors appears in Part I – Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2025. There have been no material changes in the risk factors from those disclosed in the Annual Report on Form 10-K for 2025.

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

(e) Our Board of Directors has authorized the repurchase of up to $7.378 billion worth of our common stock through multiple authorizations through September 30, 2026. Currently, there is no expiration date for the common stock repurchase program. On October 20, 2026, our Board of Directors approved an increase in the stock repurchase program by an additional $800.0 million. As of October 20, 2026, the Company had approximately $925.6 million of authorization remaining for the purchase of common stock under the program.

Information regarding the repurchase of common stock during the three months ended September 30, 2026 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
July 2026	529,000	$	98.27	529,000	$	330,744,000
August 2026	771,000	107.40		771,000	247,939,000
September 2026	743,000	106.40		743,000	167,655,000
Total	2,043,000	$	104.67	2,043,000

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

Item 5. Other Information.

During the three months ended September 30, 2026, 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

SIGNATURES

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

SEI INVESTMENTS COMPANY

Date:

October 26, 2026

By:

/s/ Sean J. Denham

Sean J. Denham

Chief Financial and Chief Operating Officer