SEI Investments Company
11/10/2026 | Press release | Distributed by Public on 11/10/2026 12:48
Initial Quarterly Holdings Report by Institutional Manager (Form 13F-HR)
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The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete. |
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F COVER PAGE |
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| Report for the Calendar Year or Quarter Ended: | 09-30-2026 |
| Check here if Amendment | Amendment Number: | |
| This Amendment (Check only one.): | is a restatement. | |
| adds new holdings entries. |
| Institutional Investment Manager Filing this Report: | |
| Name: | SEI INVESTMENTS CO |
| Address: | 1 FREEDOM VALLEY DRIVE |
| OAKS, PA 19456-1100 | |
| Form 13F File Number: | 028-16454 |
The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.
| Person Signing this Report on Behalf of Reporting Manager: | ||||
| Name: | Michael N. Peterson | |||
| Title: | Executive Vice President | |||
| Phone: | 610-676-1000 | |||
| Signature, Place, and Date of Signing: | ||||
| Michael N. Peterson | Oaks, PA | 11-10-2026 | ||
| [Signature] | [City, State] | [Date] | ||
| Report Type (Check only one.): | |
| 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) | |
| 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) | |
| X | 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) |
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List of Other Managers Reporting for this Manager: [If there are no entries in this list, omit this section.] |
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| Form 13F File Number | Name | ||
| 028-05990 | ACADIAN ASSET MANAGEMENT LLC | ||
| 028-10562 | ALLIANCEBERNSTEIN L.P. | ||
| 028-10120 | AQR CAPITAL MANAGEMENT LLC | ||
| 028-17137 | Arcus Capital Partners, LLC | ||
| 028-13791 | ArrowMark Colorado Holdings LLC | ||
| 028-05615 | AXIOM INVESTORS LLC /DE | ||
| 028-11939 | Beutel, Goodman & Co Ltd. | ||
| 028-12820 | BRIGADE CAPITAL MANAGEMENT, LP | ||
| 028-11728 | CAUSEWAY CAPITAL MANAGEMENT LLC | ||
| 028-11563 | Coho Partners, Ltd. | ||
| 028-14668 | Copeland Capital Management, LLC | ||
| 028-14036 | Fiera Capital Corp | ||
| 028-05229 | GREAT LAKES ADVISORS, LLC | ||
| 028-11957 | Hillsdale Investment Management Inc. | ||
| 028-04211 | INTECH INVESTMENT MANAGEMENT LLC | ||
| 028-14777 | J O HAMBRO CAPITAL MANAGEMENT LTD | ||
| 028-17689 | KETTLE HILL CAPITAL MANAGEMENT, LLC | ||
| 028-13608 | LMCG INVESTMENTS, LLC | ||
| 028-06580 | LSV ASSET MANAGEMENT | ||
| 028-13124 | Macquarie Investment Management LTD | ||
| 028-03673 | MANULIFE INVESTMENT MANAGEMENT (US) LLC | ||
| 028-13243 | MAR VISTA INVESTMENT PARTNERS LLC | ||
| 028-10682 | MARATHON ASSET MANAGEMENT LP | ||
| 028-04632 | MARTINGALE ASSET MANAGEMENT L P | ||
| 028-13573 | Neuberger Berman Group LLC | ||
| 028-04981 | GOLDMAN SACHS GROUP INC | ||
| 028-10952 | PACIFIC INVESTMENT MANAGEMENT CO LLC | ||
| 028-03042 | PANAGORA ASSET MANAGEMENT INC | ||
| 028-04558 | PARAMETRIC PORTFOLIO ASSOCIATES LLC | ||
| 028-13350 | Poplar Forest Capital LLC | ||
| 028-14009 | QS Investors, LLC | ||
| 028-19339 | Qtron Investments LLC | ||
| 028-10674 | RAMIUS ADVISORS LLC | ||
| 028-14481 | RWC Asset Management LLP | ||
| 028-04691 | SCHAFER CULLEN CAPITAL MANAGEMENT INC | ||
| 028-11338 | SSGA FUNDS MANAGEMENT INC | ||
| 028-07104 | WCM INVESTMENT MANAGEMENT, LLC | ||
| 028-04413 | Allspring Global Investments, LLC | ||
| 028-14178 | Stone Harbor Investment Partners LP | ||
| 028-22464 | Leeward Investments, LLC - MA | ||
| 028-18430 | Alphinity Investment Management Pty Ltd | ||
| 028-00060 | BARINGS LLC | ||
| 028-04825 | BAILLIE GIFFORD & CO | ||
| 028-23502 | Aikya Investment Management Ltd | ||
| 028-18146 | Benefit Street Partners LLC | ||
| 028-18913 | Blackcrane Capital, LLC | ||
| 028-04295 | BLACKROCK ADVISORS LLC | ||
| 028-03946 | BlackRock Institutional Trust Company, N.A. | ||
| 028-18845 | Fondsmaeglerselskabet Maj Invest A/S | ||
| 028-11937 | J.P. Morgan Investment Management Inc. | ||
| 028-11300 | Spectrum Asset Management, Inc. | ||
| 028-24840 | Skerryvore Asset Management Ltd | ||
| 028-19113 | Stratos Wealth Advisors, LLC | ||
| 028-16201 | Stratos Wealth Partners, LTD. | ||
| 028-19493 | Stratos Investment Management, LLC | ||
| 028-27151 | SEI-Eclipse Holding Company, LLC | ||
| 028-05775 | Brown Advisory LLC | ||
| 028-10648 | Diamond Hill Capital Management, LLC (Investment Advisor) | ||
| Form 13F Summary Page | |||||
| Report Summary: | |||||
| Number of Other Included Managers: | 3 | ||||
| Form 13F Information Table Entry Total: | 6,069 | ||||
| Form 13F Information Table Value Total: | 112,638,826,149 | ||||
| (thousands) | |||||
| List of Other Included Managers: | |||
| Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. | |||
| [If there are no entries in this list, state "NONE" and omit the column headings and list entries.] | |||
| No. | Form 13F File Number | Name | |
| 1 | 028-16475 | SEI INVESTMENTS MANAGEMENT CORP | |
| 2 | 028-10297 | SEI TRUST CO | |
| 3 | 028-16449 | SEI Investments Canada Co | |
SEI Investments Company published this content on November 10, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on November 10, 2026 at 18:48 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]