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SEIC SEI Investments

Cover

CoverJan. 27, 2021
Cover [Abstract]
Document Type8-K
Document Period End DateJan. 27,
2021
Entity Registrant NameSEI INVESTMENTS COMPANY
Entity Central Index Key0000350894
Amendment Flagfalse
Entity Incorporation, State or Country CodePA
Entity File Number0-10200
Entity Tax Identification Number23-1707341
Entity Address, Address Line One1 Freedom Valley Drive
Entity Address, City or TownOaks
Entity Address, State or ProvincePA
Entity Address, Postal Zip Code19456
City Area Code610
Local Phone Number676-1000
Written Communicationsfalse
Soliciting Materialfalse
Pre-commencement Tender Offerfalse
Pre-commencement Issuer Tender Offerfalse
Title of 12(b) SecurityCommon Stock, par value $0.01 per share
Trading SymbolSEIC
Security Exchange NameNASDAQ
Entity Emerging Growth Companyfalse