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Table of Contents ( Mark one ) ☑ ㅁ 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 Commission File Number : 001-35589 FS BANCORP , INC . ( Exact name of registrant as specified in its charter ) Washington ( State or other jurisdiction of incorporation or organization ) 6920 220th Street SW , Mountlake Terrace , Washington ( Address of principal executive offices ) Registrant's telephone number , including area code : Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , $ 0.01 par value per share Securities Registered Pursuant to Section 12 ( g ) of the Act : None 45-4585178 ( I.R.S. Employer Identification Number ) 98043 ( Zip Code ) ( 425 ) 771-5299 Trading Symbol ( s ) FSBW Name of each exchange on which registered The NASDAQ Stock Market LLC No Indicate by check mark if the Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes Indicate by check mark if 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 ☐ 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 , a smaller reporting company , or an emerging growth company . See 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 □ 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 in Exchange Act Rule 12b - 2 ) . Yes □ No As of March 5 , 2021 , there were 4,233,040 shares of the Registrant's common stock outstanding . The aggregate market value of the common stock held by non- affiliates of the Registrant was $ 147,557,403 , based on the closing sales price of $ 38.57 per share of the Registrant's common stock as quoted on the NASDAQ Stock Market LLC on June 30 , 2020. For purposes of this calculation , common stock held by executive officers and directors of the Registrant is considered to be held by affiliates . DOCUMENTS INCORPORATED BY REFERENCE 1. Portions of the definitive Proxy Statement for the 2021 Annual Meeting of Shareholders ( " Proxy Statement " ) are incorporated by reference into Part III .