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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

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OMB Number: 3235-0006
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Report for the Calendar Year or Quarter Ended: 03-31-2024
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:
Michael N. Peterson OaksPA 05-07-2024
[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, the information required by Form 13F is reported herein on behalf of the following subsidiaries: SEI Investments Management Corporation ("SIMC"), SEI Trust Company and SEI Investments Canada Company (SEI Canada). 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, hedge funds, private equity funds, collective investment trusts and offshore investment funds (together, the "Pooled Investment Vehicles"). In addition, SIMC sponsor 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" below.
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      
AllianceBernstein L.P. 028-10562      
AQR Capital Management, LLC 028-10120      
Arcus 028-17137      
ArrowMark Partners 028-13791      
Axiom International Investors LLC 028-05615      
Beutel, Goodman & Company Ltd. 028-02951      
Brigade Capital Management, LP 028-12820      
Causeway Capital Management LLC 028-11728      
Coho Partners, Ltd. 028-11563      
Copeland Capital Management, LLC 028-14668      
Fiera Capital Corporation 028-14036      
Great Lakes Advisors, LLC 028-05229      
Hillsdale Investment Management Inc. 028-11957      
INTECH Investment Management LLC 028-04211      
JO Hambro Capital Management Limited 028-14777      
Kettle Hill Capital Management, LLC 028-17689      
LMCG Investments, LLC 028-13608      
LSV Asset Management 028-06580      
Macquarie Investment Management 028-13124      
Manulife Investment Management Limited 028-03673      
Mar Vista Investment Partners, LLC 028-13243      
Marathon Asset Management, L.P. 028-03743      
Martingale Asset Management, L.P. 028-04632      
Neuberger Berman LLC 028-13573      
GOLDMAN SACHS GROUP INC. 028-04981      
Pacific Investment Management Company LLC 028-12690      
PanAgora Asset Management Inc. 028-03042      
Parametric Portfolio Associates LLC 028-04558      
PIMCO 028-12690      
PIMCO Europe Ltd 028-12690      
Poplar Forest Capital, LLC 028-13350      
Principal Global Investors 028-01549      
QS Investors, LLC 028-14009      
Qtron Investments, LLC 028-19339      
Ramius Advisors, LLC 028-10674      
RWC Asset Advisors 028-14481      
Schafer Cullen Capital Management, Inc. 028-04691      
SSGA Funds Management, Inc. 028-00733      
State Street Global Advisors Trust Co. 028-00733      
WCM Investment Management 028-07104      
Victory Capital Management Inc. 028-06354      
Allspring Global Investments 028-04413      
Perpetual Investment Management Ltd 028-21079      
Diamond Hill Capital Management Inc. 028-10648      
Stone Harbor Investment Partners LP 028-14178      
Leeward Investments, LLC 028-13608      
Alphinity Investment Management 028-18430      
Form 13F Summary Page
Report Summary:
Number of Other Included Managers: 4
Form 13F Information Table Entry Total: 5,159
Form 13F Information Table Value Total: 68,249,527,190
(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 EAM Investors LLC   000144908 801-70305  
3 SEI Investments Management Corporation 028-16475 000105146 801-24593  
4 SEI Trust Company 028-10297      
5 SEI Investments Canada Company 028-16449