Page 1

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 For the transition period from Commission file number Non - accelerated filer FORM 10 - K Iowa ( State or Other Jurisdiction of Incorporation or Organization ) Title of each Class Common Stock , $ 1.00 par value MIDWESTONE FINANCIAL GROUP , INC . ( Exact name of Registrant as specified in its charter ) to 0 001-35968 102 South Clinton Street , Iowa City , IA 52240 ( Address of principal executive offices , including zip code ) ( 319 ) 356-5800 ( Registrant's telephone number , including area code ) ( I.R.S. Employer Identification Number ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) . MOFG Securities registered pursuant to Section 12 ( g ) of the Act : None 42-1206172 Indicate by check mark if 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 - 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 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 definition 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 Name of each exchange on which registered The Nasdaq Stock Market LLC Smaller reporting company Emerging growth company 0 0 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 . DOCUMENTS INCORPORATED BY REFERENCE 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 voting and non - voting common equity held by non - affiliates of the registrant , based on the last sales price quoted on the Nasdaq Global Select Market of $ 20.00 on the last business day of the registrant's most recently completed second fiscal quarter , was approximately $ 322.0 million . The number of shares outstanding of the registrant's common stock , par value $ 1.00 per share , as of March 9 , 2021 , was 15,981,088 .