On March 18, 2016, H. Michael Mattson, Executive Vice President and Chief Lending Officer of Guaranty Bank the wholly-owned subsidiary of Guaranty Federal Bancshares Inc. advised the Bank and the Company that he will be retiring effective June 30, 2016. Mattson is a board member of Ozarks Food Harvest and has served as past president and a finance committee member. He is a member of the Springfield Area Chamber of Commerce and has served on its board nominating committee and venture capital committee.