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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 0-14384 BANCFIRST CORPORATION ( Exact name of registrant as specified in its charter ) OKLAHOMA ( State or other jurisdiction of incorporation or organization ) 73-1221379 ( I.R.S. Employer Identification No. ) 101 North Broadway , Oklahoma City , Oklahoma 73102 ( Address of principal executive offices ) ( Zip Code ) Registrant's telephone number , including area code : ( 405 ) 270-1086 Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , $ 1.00 Par Value Per Share Title of each class Trading Symbol ( s ) BANF Securities registered pursuant to Section 12 ( g ) of the Act : Trading Symbol ( s ) BANFP Name of each exchange on which registered NASDAQ Global Select Market System Name of each exchange on which registered NASDAQ Global Select Market System Yes ☑ No □ Yes □ No ☑ 7.2 % Cumulative Trust Preferred Securities Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Indicate by check mark whether the registrant ( 1 ) has filed all reports required 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 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 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 Exchange Act . Large accelerated filer Non - accelerated filer Emerging growth company 凶 ☐ ☐ Accelerated filer Smaller reporting 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 by Rule 12b - 2 of the Exchange Act ) . Yes ☐ No ☑ The aggregate market value of the Common Stock held by nonaffiliates of the registrant computed using the last sale price on June 30 , 2020 was approximately $ 767,536,284 . As of January 31 , 2021 , there were 32,746,513 shares of Common Stock outstanding . DOCUMENTS INCORPORATED BY REFERENCE : Portions of the Proxy Statement for the 2021 Annual Meeting of Stockholders of the registrant ( the " 2021 Proxy Statement " ) to be filed pursuant to Regulation 14A are incorporated by reference into Part III of this report .