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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 or □ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission file number : 001-33037 SOUTHERN NATIONAL BANCORP OF VIRGINIA , INC . ( Exact name of registrant as specified in its charter ) Virginia ( State or other jurisdiction of incorporation or organization ) Title of each class Common Stock , $ 0.01 par value to 6830 Old Dominion Drive McLean , Virginia 22101 ( Address of principal executive offices ) ( Zip code ) ( 703 ) 893-7400 ( Registrant's telephone number including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading symbol SONA 20-1417448 ( I.R.S. Employer Identification No. ) Name of each exchange on which registered Nasdaq Global Market Securities registered pursuant to Section 12 ( g ) of the Act : None 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 Accelerated filer = No " 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 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 . □ Smaller reporting company Emerging growth company Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of 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 issues its audit report . Yes □ No No " Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes □ The aggregate market value of voting stock held by non - affiliates of the registrant as of June 30 , 2020 was approximately $ 230.8 million based on the closing price of the common stock on such date . The number of shares of common stock outstanding as of March 5 , 2021 was 24,438,545 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's definitive proxy statement pursuant to Regulation 14A of the Securities Exchange Act of 1934 in conjunction with the registrant's 2021 Annual Meeting of Shareholders are incorporated by reference into Part III , Items 10-14 of this Annual Report on Form 10 - K .