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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 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 : 001-39325 FORM 10 - K ATLANTIC UNION BANKSHARES CORPORATION ( Exact name of registrant as specified in its charter ) Virginia ( State or other jurisdiction of incorporation or organization ) Title of each class 1051 East Cary Street , Suite 1200 , Richmond , Virginia 23219 ( Address of principal executive offices ) ( Zip Code ) Registrant's telephone number , including area code : ( 804 ) 633-5031 Securities registered pursuant to Section 12 ( b ) of the Act : th Common Stock , par value $ 1.33 per share Depositary Shares , Each Representing a 1/400 " Interest in a Share of 6.875 % Perpetual Non - Cumulative Preferred Stock , Series A Trading Symbol ( s ) AUB 54-1598552 ( I.R.S. Employer Identification No. ) Name of exchange on which registered The NASDAQ Global Select Market AUBAP Securities registered pursuant to Section 12 ( g ) of the Act : None The NASDAQ Global Select Market No Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes 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 □ 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 and 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 Accelerated filer Non - accelerated filer 0 Smaller reporting company Emerging growth company The number of shares of common stock outstanding as of February 17 , 2021 was 78,798,747 . 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 common stock held by non - affiliates of the registrant as of June 30 , 2020 was approximately $ 1,789,465,089 based on the closing share price on that date of $ 23.16 per share . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's definitive proxy statement to be used in conjunction with the registrant's 2021 Annual Meeting of Shareholders are incorporated by reference into Part III of this Form 10 - K .