Financial Analysis

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 is designed to be completed by SEI-Eclipse in two stages. The first stage is 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 is an option to acquire all 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). The due diligence process regarding Stratos NSC Holdings and NSC Asesores is still ongoing and the Company has not yet determined if it will cause SEI-Eclipse to exercise the second stage option. On December 3, 2025 (the Cl …

BusinessCombinationDisclosureTextBlock · excerpt; the full note is in the filing

Commitments and Contingencies The Company leases software, facilities, and equipment under non-cancelable operating leases, some which contain escalation clauses for increased taxes and operating expenses. The Company has entered into maintenance agreements primarily for its equipment. Rent expense, primarily related to user licenses for software, was $88,855, $81,142 and $71,962 in 2025, 2024 and 2023, respectively. The aggregate noncancellable minimum commitments at December 31, 2025 are: Year Aggregate Noncancellable Minimum Commitments 2026 $ 11,997 2027 9,561 2028 6,153 2029 6,114 2030 and thereafter 12,998 $ 46,823 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 December 31, 2025 and 2024 related to these indemnifications. Rubicon Wealth Management As the Company reported in prior filings with the Commission, on May 1, 2024, SEI Private Trus …

CommitmentsAndContingenciesDisclosureTextBlock · excerpt; the full note is in the filing

Lines of Credit On August 18, 2025, 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 Companys $325,000 former 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 Companys 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 t …

DebtDisclosureTextBlock · excerpt; the full note is in the filing

The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Companys business segments for 2025, 2024 and 2023: Investment Managers Private Banks Investment Advisors Institutional Investors Investments in New Businesses Total Major Product Lines: For the Year Ended December 31, 2025 Investment management fees from pooled investment products $ 602 $ 133,221 $ 225,196 $ 49,994 $ 1,632 $ 410,645 Investment management fees from investment management agreements 4,026 230,050 212,128 20,335 466,539 Investment operations fees 767,883 2,508 86,453 68 1,999 858,911 Investment processing fees - PaaS 5,379 317,062 6,371 2,113 41 330,966 Investment processing fees - SaaS 88,339 5,319 7,344 13,340 114,342 Professional services fees 5,917 24,938 1,614 32,469 Account fees and other 35,224 2,845 24,008 10,851 10,581 83,509 Total revenues $ 815,005 $ 572,939 $ 577,397 $ 282,498 $ 49,542 $ 2,297,381 Primary Geographic Markets: United States $ 718,216 $ 379,967 $ 577,397 $ 234,911 $ 47,246 $ 1,957,737 United Kingdom 286 129,463 32,977 2,296 165,022 Canada 42,547 6,086 48,633 Ireland 59,399 20,962 8,524 88,885 Luxembourg 37,104 37,104 Total revenues $ 815,005 $ 572,939 $ 577,397 $ 282,498 $ 49,542 $ 2,297,381 Investment Managers Private Banks Investment Advisors Institutional Investors Investments in New Businesses Total Major Product L …

DisaggregationOfRevenueTableTextBlock · excerpt; the full note is in the filing

Goodwill and Intangible Assets The carrying amount of the Company's goodwill by segment at December 31, 2025 and 2024 is as follows: Investment Managers Investment Advisors Institutional Investors Investments in New Businesses Total Balance, January 1, 2024 $ 56,990 $ $ 61,884 18,459 $ 137,333 Acquisitions 33,131 33,131 Measurement period adjustments 25 25 Reclassification due to segment reorganization (1,711) 1,711 Foreign currency translation adjustments (12) (190) (202) Balance, December 31, 2024 $ 55,267 $ 33,131 $ 61,719 $ 20,170 $ 170,287 Acquisition of Stratos (See Note 14) 186,549 186,549 Divestiture of Family Office Services business (1,711) (1,711) Measurement period adjustments (1,109) (1,109) Foreign currency translation adjustments (20) 993 973 Balance, December 31, 2025 $ 55,247 $ 218,571 $ 62,712 $ 18,459 $ 354,989 The Company's intangible assets consist of: 2025 Weighted Average Estimated Useful Life 2024 Weighted Average Estimated Useful Life Client relationships $ 356,635 18.7 years $ 63,785 9.8 years Acquired technology 49,186 7.9 years 61,060 7.5 years Trade name 5,205 7.8 years 4,890 15.3 years Non-competition agreements 6,780 6.0 years 3,470 5.0 years 417,806 133,205 Less: Accumulated amortization (49,534) (55,835) Intangible assets, net $ 368,272 $ 77,370 During 2025, the Company recognized significant additions to its intangible assets as a result of the Stratos Acquisition (See Note 14). The Company recognized $14,776, $13,448 and $12,161 of amortizat …

GoodwillAndIntangibleAssetsDisclosureTextBlock · excerpt; the full note is in the filing

Income Taxes The federal and state and foreign income tax provision is summarized as follows: Year Ended December 31, 2025 2024 2023 Current tax provision: Federal $ 100,730 $ 138,970 $ 133,465 State 21,922 26,536 23,621 Foreign 16,894 13,840 8,807 Total Current 139,546 179,346 165,893 Deferred Tax Provision: Federal 56,862 (8,558) (29,837) State 1,973 (5,161) (3,620) Foreign 402 (61) (39) Total Deferred 59,237 (13,780) (33,496) Total Current and Deferred Tax Provision: Federal 157,592 130,412 103,628 State 23,895 21,375 20,001 Foreign 17,296 13,779 8,768 Provision for income taxes $ 198,783 $ 165,566 $ 132,397 Annual tax provisions include amounts considered sufficient to pay assessments that may result from examination of prior year tax returns; however, the amount ultimately paid upon resolution of issues raised may differ materially from the amount accrued. The examination and the resolution process may last longer than one year. The components of Income before income taxes are summarized as follows: Year Ended December 31, 2025 2024 2023 Domestic $ 838,477 $ 682,017 $ 545,642 Foreign 77,856 64,740 49,013 $ 916,333 $ 746,757 $ 594,655 The Company's foreign income is primarily earned in Canada, the Republic of Ireland, Luxembourg and the United Kingdom. A reconciliation of the provision for income taxes to the amount computed by applying the statutory U.S. federal income tax rate to income before income taxes is as follows: Year Ended December 31, 2025 2024 2023 Amount Per …

IncomeTaxDisclosureTextBlock · excerpt; the full note is in the filing

Leases The Company has operating leases for corporate facilities and equipment. The Company's expense related to leases during 2025, 2024 and 2023 was $8,316, $9,571 and $10,334, respectively, and is included in Facilities, supplies and other costs on the accompanying Consolidated Statements of Operations. During 2025, 2024 and 2023 the Company incurred variable lease costs of $1,022, $1,137 and $1,084, respectively included in total expense. The Company's future minimum lease payments under non-cancelable leases as of December 31, 2025 are as follows: Year Future Minimum Lease Payment 2026 $ 9,296 2027 6,237 2028 3,389 2029 3,218 2030 3,024 Thereafter 6,933 Total future minimum lease payments 32,097 Less: Imputed interest (3,535) Total $ 28,562 The following table provides supplemental Consolidated Balance Sheet information related to the Company's leases: 2025 2024 Current portion of long-term operating lease liabilities $ 8,677 $ 7,900 Long-term operating lease liabilities 19,885 24,235 Total operating lease liabilities $ 28,562 $ 32,135 Weighted average remaining lease term 5.4 years 5.9 years Weighted average discount rate 4.01 % 3.86 % The following table provides supplemental cash flow information related to the Company's leases: Year Ended December 31, 2025 2024 2023 Cash paid for amounts included in the measurement of lease liabilities $ 9,711 $ 8,531 $ 11,092 Right-of-use assets obtained in exchange for lease obligations $ 1,548 $ 13,076 $ 6,009 As of December 31, 2 …

LesseeOperatingLeasesTextBlock · excerpt; the full note is in the filing

Recently Adopted Accounting Pronouncements In December 2023, the Financial Accounting Standards Board (FASB) issued ASU 2023-09, Income Taxes (Topic 740): Improvement to Income Tax Disclosures (ASU 2023-09) to enhance the transparency and decision usefulness of income tax disclosures. The Company adopted ASU 2023-09 for the fiscal year ended December 31, 2025 and applied the disclosure requirements on a retrospective basis. See Note 11 for related disclosures regarding the Company's income taxes. New Accounting Pronouncements In November 2024, the FASB issued ASU 2024-03, Income StatementReporting Comprehensive IncomeExpense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (ASU 2024-03) and in January 2025, the FASB issued ASU 2025-01, Income StatementReporting Comprehensive IncomeExpense 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 …

NewAccountingPronouncementsPolicyPolicyTextBlock · excerpt; the full note is in the filing

Employee Benefit Plan The Company has a tax-qualified defined contribution plan (the Plan). The Plan provides retirement benefits, including provisions for early retirement and disability benefits, as well as a tax-deferred savings feature. After satisfying certain requirements, participants are vested in employer contributions at the time the contributions are made. All Company contributions are discretionary and are made from available profits. The Company contributed $20,315, $19,038 and $18,069 to the Plan in 2025, 2024 and 2023, respectively.

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Related Party Transactions The Company, either by itself or through its wholly-owned subsidiaries, serves as the sponsor, administrator, investment advisor, distributor and shareholder servicer for SEI-sponsored investment products. These investment products are offered to clients of the Company and its subsidiaries. Fees earned by the Company for the related services are recognized pursuant to the provisions of investment advisory, fund administration, distribution, and shareholder services agreements directly with the investment products. These fees totaled $388,727, $389,476 and $389,219 in 2025, 2024 and 2023, respectively. The Company's broker-dealer subsidiary, SIDCO, serves as an introducing broker-dealer for securities transactions of SEI-sponsored investment products. The Company recognized $2,512, $1,815 and $1,352 in commissions during 2025, 2024 and 2023, respectively. Both of these fees are reflected in Asset management, administration and distribution fees on the accompanying Consolidated Statements of Operations. Receivables from investment products on the accompanying Consolidated Balance Sheets primarily represent fees receivable for distribution, investment advisory, and administration services to various investment products sponsored by SEI.

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Revenues from Contracts with Customers The Companys principal sources of revenues are: (1) asset management, administration and distribution fees primarily earned based upon a contractual percentage of net assets under management or administration; and (2) information processing and software servicing fees that are either recurring and primarily earned based upon the number of trust accounts being serviced or a percentage of the market value of the clients' assets processed on the Company's platforms, or non-recurring and based upon project-oriented contractual agreements related to client implementations. Disaggregation of Revenue The following tables provide additional information pertaining to our revenues disaggregated by major product line and primary geographic market based on the location of the use of the products or services for each of the Companys business segments for 2025, 2024 and 2023: Investment Managers Private Banks Investment Advisors Institutional Investors Investments in New Businesses Total Major Product Lines: For the Year Ended December 31, 2025 Investment management fees from pooled investment products $ 602 $ 133,221 $ 225,196 $ 49,994 $ 1,632 $ 410,645 Investment management fees from investment management agreements 4,026 230,050 212,128 20,335 466,539 Investment operations fees 767,883 2,508 86,453 68 1,999 858,911 Investment processing fees - PaaS 5,379 317,062 6,371 2,113 41 330,966 Investment processing fees - SaaS 88,339 5,319 7,344 13,340 114, …

RevenueFromContractWithCustomerTextBlock · excerpt; the full note is in the filing

Business Segment Information The Company's business segments are generally organized around its target markets. The Companys 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; developing network and data protection services; the modularization of larger technology platforms; 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 a …

SegmentReportingDisclosureTextBlock · excerpt; the full note is in the filing

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 …

SignificantAccountingPoliciesTextBlock · excerpt; the full note is in the filing

Shareholders Equity Stock-Based Compensation The Company's active equity compensation plan, the 2024 Omnibus Equity Compensation Plan (the 2024 Plan), is the successor plan to the 2014 Equity Compensation Plan (the 2014 Plan) which was merged with and into the 2024 Plan in May 2024. The 2024 Plan provides for the grant of stock options, stock units, stock awards, stock appreciation rights and other stock-based awards. No further grants will be made under the 2014 Plan, and shares with respect to all grants outstanding under the 2014 Plan will be issued or transferred under the 2024 Plan. Permitted grantees under the 2024 Plan include employees, non-employee directors and consultants who perform services for the Company. The plan is administered by the Compensation Committee of the Board of Directors of the Company. As of December 31, 2025, the Company has restricted stock units and non-qualified stock options outstanding under the 2024 Plan. As of December 31, 2025, a total of 12,388,000 shares of common stock remain available for issuance under the 2024 Plan for future grants. The Company recognized stock-based compensation expense in its Consolidated Financial Statements in 2025, 2024 and 2023 as follows: 2025 2024 2023 Stock-based compensation expense $ 53,555 $ 58,626 $ 31,308 Less: Deferred tax benefit (9,281) (11,347) (5,989) Stock-based compensation expense, net of tax $ 44,274 $ 47,279 $ 25,319 During 2025, allowances provided to certain employees related to the vesti …

StockholdersEquityNoteDisclosureTextBlock · excerpt; the full note is in the filing

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 June 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 Rubicons 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 priso …

CommitmentsAndContingenciesDisclosureTextBlock · excerpt; the full note is in the filing

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 Companys $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 Companys 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 …

DebtDisclosureTextBlock · excerpt; the full note is in the filing

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 June 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 June 30, 2026 Investment management fees from pooled investment products $ 213 $ 37,058 $ 59,967 $ 14,130 $ 452 $ 111,820 Investment management fees from investment management agreements 1,002 73,799 51,273 5,556 131,630 Investment operations fees 215,536 632 34,298 20 2 250,488 Investment processing fees - PaaS 1,436 86,550 1,735 222 11 89,954 Investment processing fees - SaaS 22,981 1,056 1,693 574 26,304 Professional services fees 2,124 7,996 10,120 Account fees and other 8,370 660 7,042 2,364 2,865 21,301 Total revenues $ 227,679 $ 156,879 $ 177,897 $ 69,702 $ 9,460 $ 641,617 Primary Geographic Markets: United States $ 199,061 $ 102,348 $ 177,897 $ 57,799 $ 8,386 $ 545,491 United Kingdom 2 36,313 6,935 1,074 44,324 Canada 12,227 1,553 13,780 Ireland 17,087 5,991 3,415 26,493 Luxembourg 11,529 11,529 Total revenues $ 227,679 $ 156,879 $ 177,897 $ 69,702 $ 9,460 $ 641,617 Investment Managers Private Banks Investment Advisors Institutional Investors Investments In New Businesses Total Major Product Lines: For the Three M …

DisaggregationOfRevenueTableTextBlock · excerpt; the full note is in the filing

Goodwill and Intangible Assets 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 34,679 34,679 Foreign currency translation adjustments (19) (229) (248) Balance, June 30, 2026 $ 55,228 $ 253,250 $ 62,483 $ 18,459 $ 389,420 The Company recognized $19,132 and $6,606 of amortization expense related to acquired intangible assets during the six months ended June 30, 2026 and 2025, respectively. …

GoodwillAndIntangibleAssetsDisclosureTextBlock · excerpt; the full note is in the filing

Income Taxes The gross liability for unrecognized tax benefits at June 30, 2026 and December 31, 2025 was $14,815 and $13,613, respectively, exclusive of interest and penalties, of which $15,045 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 June 30, 2026 and December 31, 2025, the combined amount of accrued interest and penalties related to tax positions taken on tax returns was $2,136 and $1,685, respectively. June 30, 2026 December 31, 2025 Gross liability for unrecognized tax benefits, exclusive of interest and penalties $ 14,815 $ 13,613 Interest and penalties on unrecognized benefits 2,136 1,685 Total gross uncertain tax positions $ 16,951 $ 15,298 Amount included in Current liabilities $ 4,057 $ 3,642 Amount included in Other long-term liabilities 12,894 11,656 $ 16,951 $ 15,298 The effective income tax rate for the three and six months ended June 30, 2026 and 2025 differs from the federal income tax statutory rate due to the following: Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Statutory rate 21.0 % 21.0 % 21.0 % 21.0 % State taxes, net of federal tax benefit 2.9 2.8 2.9 2.8 Foreign tax expense and tax rate differential (0.1) (0.2) (0.1) (0.2) Tax benefit from stock option exercises (1.4) (0.8) (1.0) (0.7) Energy tax credits (1.3) (0.7) Other, net 0.1 (0.5) 0.2 (0.4) 21.2 % 22.3 % 22.3 …

IncomeTaxDisclosureTextBlock · excerpt; the full note is in the filing

New Accounting Pronouncements In November 2024, the FASB issued ASU 2024-03, Income StatementReporting Comprehensive IncomeExpense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses (ASU 2024-03) and in January 2025, the FASB issued ASU 2025-01, Income StatementReporting Comprehensive IncomeExpense 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 202 …

NewAccountingPronouncementsPolicyPolicyTextBlock · excerpt; the full note is in the filing

Revenues from Contracts with Customers The Companys 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 June 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 June 30, 2026 Investment management fees from pooled investment products $ 213 $ 37,058 $ 59,967 $ 14,130 $ 452 $ 111,820 Investment management fees from investment management agreements 1,002 73,799 51,273 5,556 131,630 Investment operations fees 215,536 632 34,298 20 2 250,488 Investment processing fees - PaaS 1,436 86,550 1,735 222 11 89,954 Investment processing fees - SaaS 22,981 1,056 1,6 …

RevenueFromContractWithCustomerTextBlock · excerpt; the full note is in the filing

Business Segment Information The Company's business segments are generally organized around its target markets. The Companys 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 …

SegmentReportingDisclosureTextBlock · excerpt; the full note is in the filing

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 …

SignificantAccountingPoliciesTextBlock · excerpt; the full note is in the filing

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 six months ended June 30, 2026 and 2025, respectively, as follows: Three Months Ended June 30, Six Months Ended June 30, 2026 2025 2026 2025 Stock-based compensation expense $ 16,313 $ 13,891 $ 30,809 $ 28,029 Less: Deferred tax benefit (2,717) (2,554) (5,127) (5,176) Stock-based compensation expense, net of tax $ 13,596 $ 11,337 $ 25,682 $ 22,853 As of June 30, 2026, there was approximately $80,708 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 six months ended June 30, 2026 was $44,233. The total options exercisable as of June 30, 2026 had an intrinsic value of $195,276. The total intrinsic value for options exercisable is calculated as the difference between the market value of the Companys common stock as of June 30, 2026 and the weighted average exercise price of the options. The market value of the Companys common stock as of June 30, 2026 was $87.71 as reported by the Nasdaq Stock Market, LLC. The weighted average exercise price of the options exercisable as of June 30, 2026 was $59.46. Total options that wer …

StockholdersEquityNoteDisclosureTextBlock · excerpt; the full note is in the filing