    <SEC-DOCUMENT>0000350894-22-000023-index.html : 20220427
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    <ACCEPTANCE-DATETIME>20220427140202
    ACCESSION NUMBER:		0000350894-22-000023
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		53
    CONFORMED PERIOD OF REPORT:	20220601
    FILED AS OF DATE:		20220427
    DATE AS OF CHANGE:		20220427

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-10200
    		FILM NUMBER:		22858639

    	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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    <SEQUENCE>1
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    <DESCRIPTION>DEFINITIVE PROXY STATEMENT
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