<SEC-DOCUMENT>0000791963-24-000038-index.html : 20240610 <SEC-HEADER>0000791963-24-000038.hdr.sgml : 20240610 <ACCEPTANCE-DATETIME>20240610154016 ACCESSION NUMBER: 0000791963-24-000038 CONFORMED SUBMISSION TYPE: 11-K PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20231231 FILED AS OF DATE: 20240610 DATE AS OF CHANGE: 20240610 FILER: COMPANY DATA: COMPANY CONFORMED NAME: OPPENHEIMER HOLDINGS INC CENTRAL INDEX KEY: 0000791963 STANDARD INDUSTRIAL CLASSIFICATION: SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211] ORGANIZATION NAME: 02 Finance IRS NUMBER: 980080034 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 11-K SEC ACT: 1934 Act SEC FILE NUMBER: 001-12043 FILM NUMBER: 241032507 BUSINESS ADDRESS: STREET 1: 85 BROAD STREET STREET 2: 22ND FLOOR CITY: NEW YORK STATE: NY ZIP: 10004 BUSINESS PHONE: (212) 825-4331 MAIL ADDRESS: STREET 1: 85 BROAD STREET STREET 2: 22ND FLOOR CITY: NEW YORK STATE: NY ZIP: 10004 FORMER COMPANY: FORMER CONFORMED NAME: FAHNESTOCK VINER HOLDINGS INC DATE OF NAME CHANGE: 19950725 FORMER COMPANY: FORMER CONFORMED NAME: VINER E A HOLDINGS LTD DATE OF NAME CHANGE: 19880622 FORMER COMPANY: FORMER CONFORMED NAME: GOLDALE INVESTMENTS LTD DATE OF NAME CHANGE: 19861030 </SEC-HEADER> <DOCUMENT> <TYPE>11-K <SEQUENCE>1 <FILENAME>oppenheimer401k-2023fs.htm <DESCRIPTION>11-K <TEXT> Document 1 - file: oppenheimer401k-2023fs.htm
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