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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 10 - K 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 For the transition period from to Commission file number 0-12014 IMPERIAL OIL LIMITED ( Exact name of registrant as specified in its charter ) CANADA ( State or other jurisdiction of incorporation or organization ) 505 QUARRY PARK BOULEVARD S.E. , CALGARY , AB , CANADA ( Address of principal executive offices ) 98-0017682 ( I.R.S. Employer Identification No. ) T2C 5N1 ( Postal Code ) Title of each class None 1-800-567-3776 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading symbol Securities registered pursuant to Section 12 ( g ) of the Act : Common Shares ( without par value ) ( Title of Class ) Indicate by check mark if the registrant is a well - known seasoned issuer ( as defined in Rule 405 of the Securities Act ) . Yes No ...... Name of each exchange on which registered None Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Securities Exchange Act of 1934. Yes . No ✓ Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ✓ No ...... Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T during the preceding 12 months ( or for such shorter period that the registrant was required to submit and post such files ) . Yes ✓ No ...... Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer " , " accelerated filer " , " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Securities Exchange Act of 1934 . Large accelerated filer ✓ Accelerated filer ...... Non - accelerated filer ...... Smaller reporting company ...... Emerging growth company ...... If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act ...... Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . ✓ Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12 b - 2 of the Securities Exchange Act of 1934 ) . Yes .... No ✓ As of the last business day of the 2020 second fiscal quarter , the aggregate market value of the voting stock held by non - affiliates of the registrant was Canadian $ 4,873,811,386 based upon the reported last sale price of such stock on the Toronto Stock Exchange on that date . The number of common shares outstanding , as of February 16 , 2021 , was 734,076,755 .