Page 1

Table of Contents As filed with the U.S. Securities and Exchange Commission on March 1 , 2021 0 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D. C. 20549 ( Mark One ) X ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FORM 10 - K TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR For the transition period from Delaware ( State or other jurisdiction of incorporation or organization ) 85 Broad Street , New York , ( Address of principal executive offices ) OPPENHEIMER HOLDINGS INC . ( Exact name of registrant as specified in its charter ) Title of each class Class A non - voting common stock to Commission file number 1-12043 NY 98-0080034 ( I.R.S. Employer Identification No. ) 10004 ( Zip Code ) Registrant's Telephone number , including area code : ( 212 ) 668-8000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol OPY Name of each exchange on which registered The New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : Not Applicable ( Title of class ) No X Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes o Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act . Yes o No x