<SEC-DOCUMENT>0000929638-23-000801.txt : 20230306
<SEC-HEADER>0000929638-23-000801.hdr.sgml : 20230306
<ACCEPTANCE-DATETIME>20230306180347
ACCESSION NUMBER:		0000929638-23-000801
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20220419
FILED AS OF DATE:		20230306
DATE AS OF CHANGE:		20230306

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Brassington Jonathan
		CENTRAL INDEX KEY:			0001967817

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10200
		FILM NUMBER:		23710269

	MAIL ADDRESS:	
		STREET 1:		ONE FREEDOM VALLEY DRIVE
		CITY:			OAKS
		STATE:			PA
		ZIP:			19456

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEI INVESTMENTS CO
		CENTRAL INDEX KEY:			0000350894
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				231707341
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1 FREEDOM VALLEY DRIVE
		CITY:			OAKS
		STATE:			PA
		ZIP:			19456-1100
		BUSINESS PHONE:		6106761000

	MAIL ADDRESS:	
		STREET 1:		1 FREEDOM VALLEY DRIVE
		CITY:			OAKS
		STATE:			PA
		ZIP:			19456-1100

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SEI INVESTMENT CO
		DATE OF NAME CHANGE:	20040806

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	SEI CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
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<TYPE>3
<SEQUENCE>1
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<TEXT>
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<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2022-04-19</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000350894</issuerCik>
        <issuerName>SEI INVESTMENTS CO</issuerName>
        <issuerTradingSymbol>SEIC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001967817</rptOwnerCik>
            <rptOwnerName>Brassington Jonathan</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ONE FREEDOM VALLEY DRIVE</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>OAKS</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19456</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <remarks>Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>/s/ Jonathan A. Brassington by Michael N. Peterson, attorney in fact</signatureName>
        <signatureDate>2023-03-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
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<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>ex24.htm
<TEXT>
<html>
  <head>
    <title></title>
    <!-- Licensed to: Morgan, Lewis & Bockius
         Document created using Broadridge PROfile 23.1.1.5115
         Copyright 1995 - 2023 Broadridge -->
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<body style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; text-align: left; color: #000000;" bgcolor="#ffffff">
  <div style="text-align: right;"><font style="font-weight: bold;">Exhibit 24</font><br>
  </div>
  <div> <br>
  </div>
  <div>
    <div><br>
    </div>
    <div style="text-align: center; margin-top: 0.35pt; color: #000000; font-family: 'Times New Roman'; font-size: 8pt; font-weight: bold;">POWER OF ATTORNEY</div>
    <div style="text-indent: 32.4pt; margin-right: 3.6pt; margin-top: 12.5pt; color: #000000; font-family: 'Times New Roman';">Known all by these presents that the undersigned hereby constitutes and appoints each of Michael Peterson, Rebecca Stump and
      Diane Gallagher signing singly, the undersigned&#8217;s true and lawful attorney-in-fact to:</div>
    <div style="text-indent: 32.4pt; margin-top: 12.75pt;"><font style="font-family: 'Times New Roman'; color: #000000;">(1)</font><font style="text-indent: 0px; font-size: 5.14pt;" class="TRGRRTFtoHTMLTab">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="font-family: 'Times New Roman'; color: #000000;">execute for and on behalf of the undersigned, in the undersigned&#8217;s capacity as an officer and/or director of SEI Investments Company (the &#8220;Company&#8221;), Forms 3, 4,and 5 in accordance with Section 16(a) of the
        Securities Exchange Act of 1934 and the rules thereunder;</font></div>
    <div style="text-indent: 32.4pt; margin-right: 3.6pt; margin-top: 12.5pt;"><font style="font-family: 'Times New Roman'; color: #000000;">(2)</font><font style="text-indent: 0px; font-size: 5.14pt;" class="TRGRRTFtoHTMLTab">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="font-family: 'Times New Roman'; color: #000000;">do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5 and timely file such form with the
        United States Securities and Exchange Commission and any stock exchange or similar authority; and</font></div>
    <div style="text-indent: 32.4pt; margin-right: 3.6pt; margin-top: 13pt;"><font style="font-family: 'Times New Roman'; color: #000000;">(3)</font><font style="text-indent: 0px; font-size: 5.14pt;" class="TRGRRTFtoHTMLTab">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="font-family: 'Times New Roman'; color: #000000;">take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, and in the best interest of, or legally
        required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such
        attorney-in- fact may approve in such attorney-in-fact&#8217;s discretion.</font></div>
    <div style="text-indent: 32.4pt; margin-top: 13.75pt; color: #000000; font-family: 'Times New Roman';">The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever
      requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation,
      hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact&#8217;s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned
      acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned&#8217;s responsibilities to comply with Section 16 of the Securities
      Exchange Act of 1934.</div>
    <div style="text-indent: 32.4pt; margin-right: 18pt; margin-top: 12.25pt; color: #000000; font-family: 'Times New Roman';">This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and
      5 with respect to the undersigned&#8217;s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.</div>
    <div style="text-indent: 32.4pt; margin-right: 14.4pt; margin-top: 12.2pt; margin-bottom: 6.1pt; color: #000000; font-family: 'Times New Roman';">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed on this day February
      25, 2023.</div>
    <div style="color: rgb(0, 0, 0); font-family: 'Times New Roman',Times,serif; margin-left: 243pt;"><u> <br>
      </u></div>
    <div style="color: rgb(0, 0, 0); font-family: 'Times New Roman',Times,serif; margin-left: 243pt;"><u> <br>
      </u></div>
    <div style="color: rgb(0, 0, 0); font-family: 'Times New Roman',Times,serif; margin-left: 243pt;"><u>/s/ Jonathan Brassington<br>
      </u></div>
    <div style="color: rgb(0, 0, 0); font-family: 'Times New Roman',Times,serif; margin-left: 243pt;"><font style="text-transform: uppercase;">Jonathan Brassington</font><u><br>
      </u></div>
    <div style="margin-left: 208.8pt; margin-top: 34pt; color: #000000; font-family: 'Times New Roman';"><u> <br>
      </u></div>
  </div>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
