<SEC-DOCUMENT>0000350894-24-000076-index.html : 20240423
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<ACCEPTANCE-DATETIME>20240423082934
ACCESSION NUMBER:		0000350894-24-000076
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		18
CONFORMED PERIOD OF REPORT:	20240423
ITEM INFORMATION:		Results of Operations and Financial Condition
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20240423
DATE AS OF CHANGE:		20240423

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEI INVESTMENTS CO
		CENTRAL INDEX KEY:			0000350894
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		ORGANIZATION NAME:           	02 Finance
		IRS NUMBER:				231707341
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-10200
		FILM NUMBER:		24862769

	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>8-K
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<FILENAME>seic-20240423.htm
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Document 1 - file: seic-20240423.htm

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<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>ex991reclassifiedresultsby.htm
<DESCRIPTION>RECLASSIFIED RESULTS BY BUSINESS SEGMENT YEAR OVER YEAR
<TEXT>
Document 2 - file: ex991reclassifiedresultsby.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.2
<SEQUENCE>3
<FILENAME>ex992reclassifiedresultsby.htm
<DESCRIPTION>RECLASSIFIED RESULTS BY BUSINESS SEGMENT
<TEXT>
Document 3 - file: ex992reclassifiedresultsby.htm

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<DOCUMENT>
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<SEQUENCE>4
<FILENAME>ex993reclassifiedendingass.htm
<DESCRIPTION>RECLASSIFIED ENDING ASSETS
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Document 4 - file: ex993reclassifiedendingass.htm

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<DOCUMENT>
<TYPE>EX-99.4
<SEQUENCE>5
<FILENAME>ex994reclassifiedaverageas.htm
<DESCRIPTION>RECLASSIFIED AVERAGE ASSETS
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Document 5 - file: ex994reclassifiedaverageas.htm

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<TEXT>
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Document 13 - file: Show.js

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Document 14 - file: report.css

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<SEQUENCE>16
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Document 16 - file: FilingSummary.html

Document 16 - RAW XML: FilingSummary.xml

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<SEQUENCE>18
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<TEXT>
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