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Table of Contents ( Mark One ) ☐ ☑ ☐ ☐ SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 20 - F REGISTRATION STATEMENT PURSUANT TO SECTION 12 ( b ) or ( g ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ANNUAL REPORT PURSUANT TO SECTION 13 or 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 OR TRANSITION REPORT PURSUANT TO SECTION 13 or 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SHELL COMPANY REPORT PURSUANT TO SECTION 13 or 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of event requiring this shell company report . For the transition period from to Commission file number 1-33867 TEEKAY TANKERS LTD . ( Exact name of Registrant as specified in its charter ) UNITED STATES Republic of the Marshall Islands ( Jurisdiction of incorporation or organization ) 4th Floor , Belvedere Building , 69 Pitts Bay Road , Hamilton , HM 08 Bermuda Telephone : ( 441 ) 298-2530 ( Address and telephone number of principal executive offices ) N. Angelique Burgess 4th Floor , Belvedere Building , 69 Pitts Bay Road , Hamilton , HM 08 Bermuda Telephone : ( 441 ) 298-2530 Fax : ( 441 ) 292-3931 ( Name , Telephone , E - mail and / or Facsimile number and Address of Company Contact Person ) Securities registered , or to be registered , pursuant to Section 12 ( b ) of the Act . Title of each class Class A common stock , par value of $ 0.01 per share Trading symbol TNK Name of each exchange on which registered New York Stock Exchange 1