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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 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number : 000-33063 SIERRA BANCORP ( Exact name of registrant as specified in its charter ) California ( State of incorporation ) 86 North Main Street , Porterville , California ( Address of principal executive offices ) Title of each class Common Stock , No Par Value ( 559 ) 782-4900 33-0937517 ( I.R.S. Employer Identification No. ) Registrant's telephone number , including area code Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol BSRR 93257 ( Zip Code ) Name of each exchange on which registered The NASDAQ Stock Market LLC ( NASDAQ Global Select Market ) Securities registered pursuant to Section 12 ( g ) of the Act : None No Yes Yes > No 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 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 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 Exchange Act . ( Check one ) : Large accelerated filer Non - accelerated filer Emerging growth company 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 pursuant to Section 13 ( a ) of the Exchange Act . Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . □ Yes No 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 . ☑ As of June 30 , 2020 , the last business day of the registrant's most recently completed second fiscal quarter , the aggregate market value of the voting stock held by non - affiliates of the registrant was approximately $ 262 million , based on the closing price reported to the registrant on that date of $ 18.88 per share . Shares of Common Stock held by each officer and director and each person or control group owning more than ten percent of the outstanding Common Stock have been excluded in that such persons may be deemed to be affiliates . This determination of affiliate status is not necessarily a conclusive determination for other purposes . The number of shares of common stock of the registrant outstanding as of March 1 , 2021 was 15,389,023 . Documents Incorporated by Reference : Portions of the definitive proxy statement for the 2020 Annual Meeting of Shareholders to be filed with the Securities and Exchange Commission pursuant to SEC Regulation 14A are incorporated by reference in Part III , Items 10-14 .