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SEI Investments (NASDAQ: SEIC) reports $113.3B in equity positions in latest 13F

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Form Type
13F-HR

Rhea-AI Filing Summary

SEI Investments filed a Form 13F-HR as an institutional investment manager, reporting its discretionary equity holdings and those of key operating subsidiaries. The filing is a 13F Combination Report, meaning part of the holdings are reported directly and part through other reporting managers.

SEI explains that investment and voting authority over Section 13(f) securities generally resides with subsidiaries such as SEI Investments Management Corporation, SEI Trust Company, and SEI Investments Canada Company, and that SEI itself disclaims investment discretion and voting authority, though positions are reported as having Sole Voting Authority under Form 13F instructions. The report covers 6,177 line-item holdings with an aggregate reported value of $113,347,285,164, and includes three other “included managers” plus a long list of separate “other managers reporting for this manager,” reflecting SEI’s use of sub-advisers and a manager-of-managers structure.

Positive

  • None.

Negative

  • None.
Form 13F Information Table Entry Total 6,177 Number of individual securities positions reported in the Form 13F Information Table
Form 13F Information Table Value Total $113,347,285,164 Aggregate value of all reported Section 13(f) securities, rounded to the nearest dollar
Number of Other Included Managers 3 SEI Investments Management Corp, SEI Trust Co, and SEI Investments Canada Co
Form 13F regulatory
"For purposes of the reporting requirements under Section 13(f) of the Act"
A Form 13F is a quarterly filing that large investment managers must submit to disclose their holdings in publicly traded stocks and certain other securities. It acts like a peek into the portfolios of big investors, helping other market participants see what large players are buying or selling and offering clues about investment trends, crowded trades, and potential market impact.
institutional investment manager regulatory
"SEI Investments Company (SEI) is the parent holding company of certain institutional investment managers"
Sole Voting Authority regulatory
"such Section 13(f) securities are reported as "Sole Voting Authority.""
manager of managers financial
"SIMC and SEI Canada may act as a "manager of managers" whereby each retain"
An investment approach in which a primary manager hires and oversees several specialist managers, each responsible for a portion of the portfolio—like a conductor bringing together soloists or a general contractor coordinating trades on a building. It matters to investors because it can add diversification and access to specialized skills while concentrating decision-making and monitoring with the lead manager, but can also increase fees and complexity compared with a single-manager fund.
Pooled Investment Vehicles financial
"serve as an investment adviser to a number of pooled investment vehicles"

FAQ

What is SEI Investments (SEIC) reporting in this Form 13F-HR?

SEI Investments is reporting its institutional equity holdings and those of key subsidiaries on Form 13F-HR. The report aggregates 6,177 positions with a total reported value of $113,347,285,164 as of the filing date’s reference period.

How large are SEI Investments’ reported 13F holdings in this filing?

The filing lists a total Form 13F Information Table Value of $113,347,285,164. This figure represents the aggregate fair value of the 6,177 individual securities positions reported under Section 13(f) for SEI Investments and certain subsidiaries.

What type of 13F report did SEI Investments (SEIC) file?

SEI Investments filed a 13F Combination Report. This means a portion of its reportable holdings appears in this document, while another portion is reported by other managers that are separately filing Form 13F reports on overlapping assets.

Which SEI subsidiaries are included as other managers in this 13F report?

Three subsidiaries are listed as Other Included Managers: SEI Investments Management Corp, SEI Trust Co, and SEI Investments Canada Co. Their Form 13F file numbers are identified, reflecting their role in managing and reporting Section 13(f) securities.

Does SEI Investments (SEIC) claim investment discretion and voting authority over the 13F securities?

SEI states it does not exercise and disclaims investment discretion and voting authority over Section 13(f) securities, which reside with operating subsidiaries. However, pursuant to Form 13F instructions, the securities are reported as having Sole Voting Authority for reporting purposes.

How does SEI Investments use sub-advisers within its 13F-reportable assets?

SEI Investments Management Corporation and SEI Investments Canada Co may act as managers of managers, retaining sub-advisers for pooled vehicles and SMA programs. Those sub-advisers are instructed to file their own Form 13F and are listed as “Other Managers Reporting for this Manager.”

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Learn about SEC filing dates

The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F COVER PAGE

OMB APPROVAL
OMB Number: 3235-0006
Estimated average burden
hours per response: 23.8

Report for the Calendar Year or Quarter Ended: 06-30-2026
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
CRD Number (if applicable):
SEC File Number (if applicable):

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:
/s/ Michael N. Peterson Oaks, PA 08-14-2026
[Signature] [City, State] [Date]
SEI Investments Company (SEI) is the parent holding company of certain institutional investment managers, as defined by Section 13(f) of the Securities Exchange Act of 1934, as amended (the "Act"). For purposes of the reporting requirements under Section 13(f) of the Act, and the rules promulgated thereunder, SEI does not exercise, and therefore disclaims, investment discretion with respect to any Section 13(f) securities positions over which its investment operating subsidiaries exercise such discretion. To the extent, however, that SEI's ownership interest in such subsidiaries may nevertheless give rise to a Form 13F obligation for SEI, it is reporting as follows. The information required by Form 13F is reported herein on behalf of the following subsidiaries: SEI Investments Management Corporation ("SIMC"), SEI Trust Company, SEI Investments Canada Company (SEI Canada). SEI-Eclipse Holding Co, ("Eclipse") is an indirect majority owned subsidiary of SEI. Stratos Investment Management, LLC ("SIM"), Stratos Wealth Partners, LTD. ("SWP") and Stratos Wealth Advisors, LLC ("SWA") are 100% owned indirect subsidiaries of Eclipse. Eclipse, SIM, SWP and SWA are included in the "List of Other Managers Reporting for this Manager." Voting authority with respect to the Section 13(f) securities reported herein resides with and is exercised by SEI's operating subsidiaries, unless otherwise indicated. Although SEI has not been delegated voting authority over such Section 13(f) securities, and disclaims such voting authority, pursuant to instruction 12b.viii of Form 13F, and for that purpose only, such Section 13(f) securities are reported as "Sole Voting Authority." SIMC and SEI Canada each serve as an investment adviser to a number of pooled investment vehicles, which may include mutual funds, exchange traded funds (ETFs), hedge funds, private equity funds, alternative funds, collective investment trusts and offshore investment funds (together, the "Pooled Investment Vehicles"). In addition, SIMC sponsors and may serve as adviser to, separately managed account programs (SMA Programs). SIMC and SEI Canada may act as a "manager of managers" whereby each retain, subject to SIMC's and SEI Canada's oversight, respectively, sub-advisers to buy and sell securities on behalf of such Pooled Investment Vehicles and SMA Programs. To the extent that SIMC's and SEI Canada's role as a manager of managers could give rise to a Form 13F obligation, SIMC or SEI Canada has instructed its sub-advisers to file a Form 13F with respect to such securities and has included such sub-advisers in the "List of Other Managers Reporting for this Manager
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).)
List of Other Managers Reporting for this Manager:
[If there are no entries in this list, omit this section.]
Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
ACADIAN ASSET MANAGEMENT LLC 028-05990 0000916542
ALLIANCEBERNSTEIN L.P. 028-10562 0001109448
AQR CAPITAL MANAGEMENT LLC 028-10120 0001167557
Arcus Capital Partners, LLC 028-17137 0001651960
ArrowMark Colorado Holdings LLC 028-13791 0001483859
AXIOM INVESTORS LLC /DE 028-05615 0001109147
Beutel, Goodman & Co Ltd. 028-11939 0001361974
BRIGADE CAPITAL MANAGEMENT, LP 028-12820 0001421306
CAUSEWAY CAPITAL MANAGEMENT LLC 028-11728 0001165797
Coho Partners, Ltd. 028-11563 0001350585
Copeland Capital Management, LLC 028-14668 0001541743
Fiera Capital Corp 028-14036 0001505817
GREAT LAKES ADVISORS, LLC 028-05229 0001078013
Hillsdale Investment Management Inc. 028-11957 0001368465
INTECH INVESTMENT MANAGEMENT LLC 028-04211 0001086318
J O HAMBRO CAPITAL MANAGEMENT LTD 028-14777 0000940755
KETTLE HILL CAPITAL MANAGEMENT, LLC 028-17689 0001387369
LMCG INVESTMENTS, LLC 028-13608 0001470944
LSV ASSET MANAGEMENT 028-06580 0001050470
Macquarie Investment Management LTD 028-13124 0001435053
MANULIFE INVESTMENT MANAGEMENT (US) LLC 028-03673 0001034182
MAR VISTA INVESTMENT PARTNERS LLC 028-13243 0001419999
MARATHON ASSET MANAGEMENT LP 028-10682 0001279913
MARTINGALE ASSET MANAGEMENT L P 028-04632 0000936944
Neuberger Berman Group LLC 028-13573 0001465109
GOLDMAN SACHS GROUP INC 028-04981 0000886982
PACIFIC INVESTMENT MANAGEMENT CO LLC 028-10952 0001163368
PANAGORA ASSET MANAGEMENT INC 028-03042 0000883677
PARAMETRIC PORTFOLIO ASSOCIATES LLC 028-04558 0000932859
Poplar Forest Capital LLC 028-13350 0001454949
QS Investors, LLC 028-14009 0001501436
Qtron Investments LLC 028-19339 0001768099
RAMIUS ADVISORS LLC 028-10674 0001275893
RWC Asset Management LLP 028-14481 0001520478
SCHAFER CULLEN CAPITAL MANAGEMENT INC 028-04691 0001056593
SSGA FUNDS MANAGEMENT INC 028-11338 0001257442
WCM INVESTMENT MANAGEMENT, LLC 028-07104 0001061186
Allspring Global Investments, LLC 028-04413 0001075869
Stone Harbor Investment Partners LP 028-14178 0001508123
Leeward Investments, LLC - MA 028-22464 0001923173
Alphinity Investment Management Pty Ltd 028-18430 0001731012
BARINGS LLC 028-00060 0000009015
BAILLIE GIFFORD & CO 028-04825 0001088875
Aikya Investment Management Ltd 028-23502 0002005403
Benefit Street Partners LLC 028-18146 0001543160
Blackcrane Capital, LLC 028-18913 0001720745
BLACKROCK ADVISORS LLC 028-04295 0001086364
BlackRock Institutional Trust Company, N.A. 028-03946 0000913414
Fondsmaeglerselskabet Maj Invest A/S 028-18845 0001746408
J.P. Morgan Investment Management Inc. 028-11937 0001363391
Spectrum Asset Management, Inc. 028-11300 0001318293
Skerryvore Asset Management Ltd 028-24840 0002043964
Stratos Wealth Advisors, LLC 028-19113 0001707202
Stratos Wealth Partners, LTD. 028-16201 0001612865
Stratos Investment Management, LLC 028-19493 0001707206
SEI-Eclipse Holding Company, LLC 0002150444
Brown Advisory LLC 028-05775 0001114667
Diamond Hill Capital Management, LLC (Investment Advisor) 028-10648 0001217541
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 3
Form 13F Information Table Entry Total: 6,177
Form 13F Information Table Value Total: 113,347,285,164
(round to nearest dollar)
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. Name Form 13F File No. CRD No. (if applicable) SEC File No. (if applicable) CIK
1 SEI INVESTMENTS MANAGEMENT CORP 028-16475 000105146 801-24593 0000907692
2 SEI TRUST CO 028-10297 0001204692
3 SEI Investments Canada Co 028-16449 0001633036