(b) Retirement of Dennis P. Angner.

Effective March 31, 2017, Dennis P. Angner retired as: (i) the President, the Chief Financial Officer, and a Director of Isabella Bank Corporation (the “Corporation”), and (ii) a Director of Isabella Bank (the “Bank”). Mr. Angner did not retire due to any disagreement with the Corporation or the Bank, including any disagreement related to the Corporation’s or the Bank’s operations, practices, or policies.

(c) Appointment of Jae A. Evans as Corporation President.

Effective March 31, 2017, the Board of the Corporation appointed Jae A. Evans as the Corporation’s President. Mr. Evans, age 60, was appointed a director of Isabella Bank Corporation and the Bank and elected Chief Executive Officer of Isabella Bank Corporation effective January 1, 2014. Mr. Evans has been employed by the Corporation since 2008 and has over 40 years of banking experience. He served as Chief Operations Officer of the Bank from June 2011 to December 31, 2013 and President of the Greenville Division of the Bank from January 1, 2008 to June 2011. Mr. Evans currently serves as a board member for The Community Bankers of Michigan, Art Reach of Mid Michigan, McLaren Central Michigan, is an incoming board member of the Central Michigan University Advancement Board, and is the Chair of the EightCAP, Inc. governing board. Mr. Evans is also past Vice Chair of the Carson City Hospital, was president of the Greenville Rotary Club, and past Chair of The Community Bankers of Michigan.

(c) Appointment of Rhonda S. Tudor as Interim Chief Financial Officer.

Effective March 31, 2017, the Board of the Corporation appointed Rhonda S. Tudor as the Corporation’s Interim Chief Financial Officer (Principal Financial Officer). Ms. Tudor, age 52, is a Certified Public Accountant and has over 25 years of banking experience. Since September 14, 2015, Ms. Tudor has served as the Controller and Vice President of the Corporation. Prior to joining the Corporation, Ms.Tudor was the Commercial Banking Segment Controller with Huntington Bancshares Inc. Ms. Tudor is a board member of United Way of Gratiot and Isabella Counties.

About ISABELLA BANK CORPORATION (OTCMKTS:ISBA)

Isabella Bank Corporation is a financial services holding company. The Company’s subsidiary, Isabella Bank, has approximately 30 banking offices located throughout Clare, Gratiot, Isabella, Mecosta, Midland, Montcalm and Saginaw counties. The Company offers a range of banking services to businesses, institutions and individuals. Its lending activities include loans for commercial and agricultural operating and real estate purposes, residential real estate loans and consumer loans. Deposit services offered include checking accounts, savings accounts, certificates of deposit, direct deposits, cash management services, mobile and Internet banking, electronic bill pay services and automated teller machines. The Company also offers full service trust and brokerage services. The Company provides group life, health, accident, disability and other insurance programs, as well as a number of other employee benefit programs.

ISABELLA BANK CORPORATION (OTCMKTS:ISBA) Recent Trading Information

ISABELLA BANK CORPORATION (OTCMKTS:ISBA) closed its last trading session down -0.15 at 27.60 with 1,712 shares trading hands.