X0306 4 2018-02-01 1 0001123270 BANK MUTUAL CORP BKMU 0001617618 Weekley Kimberlie D. 4949 WEST BROWN DEER ROAD MILWAUKEE WI 53223 0 1 0 0 Senior VP of Bank Mutual Common Stock 2018-02-01 4 D 0 35859 D 0 D On February 1, 2018, Bank Mutual Corporation ("BKMU") completed the previously announced merger (the "Merger") of BKMU with and into Associated Banc-Corp ("Associated"), pursuant to the Agreement and Plan of Merger, dated as of July 20, 2017, by and between BKMU and Associated (the "Merger Agreement"). In accordance with the terms of the Merger Agreement, at the effective time of the Merger each share of BKMU common stock issued and outstanding immediately prior to the effective time of the Merger (including any restricted shares) was converted into 0.422 shares of Associated common stock with cash paid in lieu of any fractional shares. On January 31, 2018, the closing price of Associated common stock on the New York Stock Exchange was $24.75 per share. /s/Kimberlie D. Weekley 2018-02-01