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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) 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 Louisiana ( State or other jurisdiction of incorporation or organization ) Title of Each Class Common Stock , par value $ 5.00 per share to Commission file number 001-38487 Origin Bancorp , Inc. ( Exact name of registrant as specified in its charter ) 500 South Service Road East Ruston , Louisiana 71270 ( 318 ) 255-2222 ( Address , including zip code , and telephone number , including area code , of registrant's principal executive offices ) Securities Registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) OBNK Securities Registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark whether the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes > No Indicate by check mark whether the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . 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 ■ 72-1192928 ( I.R.S. Employer Identification Number ) 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 ( §232.405 of this chapter ) 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 , 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 Exchange Act . ( Check one ) Name of Exchange on which Registered Nasdaq Stock Market LLC Large accelerated filer Non - accelerated filer X 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 . Accelerated filer ■ 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 . Yes > No □ Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No The aggregate market value of the voting and non - voting common equity held by non - affiliates of the Registrant was $ 483.0 million as of June 30 , 2020 , the last business day of the Registrant's most recently completed second fiscal quarter . Solely for the purpose of this computation , it has been assumed that executive officers and directors of the Registrant are " affiliates " . Indicate the number of shares outstanding of each of the issuer's classes of common stock as of the latest practicable date : 23,510,166 shares of Common Stock , par value $ 5.00 per share , were issued and outstanding as of February 17 , 2021 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Definitive Proxy Statement for the 2021 Annual Meeting of Stockholders of Origin Bancorp , Inc. to be held on April 28 , 2021 , are incorporated by reference into Part III of this Annual Report on Form 10 - K to the extent stated herein . Such Definitive Proxy Statement will be filed with the Securities and Exchange Commission within 120 days after the end of the registrant's fiscal year ended December 31 , 2020 .