X0306 4 2017-02-24 1 0001009976 COMMERCIAL BANCSHARES INC \OH\ CMOH 0001231804 DILLON MARK E P. O. BOX 342 UPPER SANDUSKY OH 43351 1 0 0 0 Common Stock 2017-02-24 4 D 0 29573 D 0 D Shares held under deferred compensation plan 2017-02-24 4 D 0 14565.822 D Common Stock 14565.822 0 I Held in rabbi trust Under the terms of the merger agreement with First Defiance Financial Corp., each shareholder of the Issuer has the right to elect to receive either $51.00 in cash or 1.1808 shares of First Defiance common stock (or a combination thereof) in exchange for each share of Issuer common owned. All elections are subject to certain adjustments under the merger agreement necessary to cause 80% of the total consideration to be paid in First Defiance Shares and the remaining 20% of the total consideration to be paid in cash. The insider has made an election to dispose of 5,914 of these shares in exchange for cash and 23,659 of these shares in exchange for First Defiance Shares, but the adjustments required under the terms of the merger agreement have yet to be finalized. Each unit credited to participant under this plan is the economic equivalent of one of issuer's common shares. These shares are vested immediately and participant account balances are payable upon termination of service on the Company's Board of Directors. Under the terms of the merger agreement with First Defiance Financial Corp., each shareholder of the Issuer has the right to elect to receive either $51.00 in cash or 1.1808 shares of First Defiance common stock (or a combination thereof) in exchange for each share of Issuer common owned. All elections are subject to certain adjustments under the merger agreement necessary to cause 80% of the total consideration to be paid in First Defiance Shares and the remaining 20% of the total consideration to be paid in cash. The insider has made an election to dispose of 2,913.822 of these shares in exchange for cash and 11,652 of these shares in exchange for First Defiance Shares, but the adjustments required under the terms of the merger agreement have yet to be finalized. /s/David J. Browne, as power of attorney for Mark E. Dillon 2017-02-27