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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 □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number : 001-33652 FIRST FINANCIAL NORTHWEST , INC . ( Exact name of registrant as specified in its charter ) ☑ Washington ( State or other jurisdiction of incorporation or organization ) 201 Wells Avenue South , Renton , Washington ( Address of principal executive offices ) Registrant's telephone number , including area code : Securities registered pursuant to Section 12 ( b ) of the Act : Common Stock , $ 0.01 par value per share ( Title of Each Class ) Securities registered pursuant to Section 12 ( g ) of the Act : Yes None 26-0610707 ( I.R.S. Employer Identification Number ) 98057 ( Zip Code ) ( 425 ) 255-4400 The Nasdaq Stock Market LLC ( Name of Each Exchange on Which Registered ) Indicate by check mark if the Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . No ✗ 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 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 Smaller reporting company X Accelerated filer Emerging growth company Non - accelerated filer X 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 12b - 2 of the Act ) . Yes ☐ No ☑ The aggregate market value of the Common Stock outstanding held by nonaffiliates of the Registrant based on the closing sales price of the Registrant's Common Stock as quoted on The Nasdaq Stock Market LLC on June 30 , 2020 , was $ 85,122,386 ( 8,784,560 shares at $ 9.69 per share ) . For purposes of this calculation , common stock held only by executive officers , the employee stock ownership plan and directors of the Registrant is considered to be held by affiliates . As of March 8 , 2021 , the Registrant had 9,655,614 shares of common stock outstanding . DOCUMENTS INCORPORATED BY REFERENCE 1. Portions of Registrant's Definitive Proxy Statement for the 2020 Annual Meeting of Shareholders ( Part III ) .