EXHIBIT C FORM OF FOBB AFFILIATE AGREEMENT May 1, 2006Affiliate Agreement • May 2nd, 2006 • First Oak Brook Bancshares Inc • State commercial banks
to MBFI that the MBFI Stock represented by such certificates is being or has been sold in conformity with the provisions of Rule 145(d) under the Securities Act.
EXHIBIT A FORM OF FOBB VOTING AGREEMENT May 1, 2006Voting Agreement • May 2nd, 2006 • First Oak Brook Bancshares Inc • State commercial banks
MB Financial, Inc. (“MBFI”), MBFI Acquisition Corp., a wholly-owned subsidiary of MBFI (“Merger Sub”) and First Oak Brook Bancshares, Inc. (“FOBB”) have entered into an Agreement and Plan of Merger dated as of May 1, 2006 (the “Merger Agreement”) pursuant to which, among other things, and subject to the terms and conditions set forth therein, (a) FOBB will merge with and into Merger Sub; and (b) the shareholders of FOBB will receive cash and/or common stock of MBFI as stated in the Merger Agreement.
