David J. Maness will reach the mandatory age for retirement according to Isabella Bank Corporation's (Corporation) bylaws in June 2023, after serving as a director for 20 years collectively between the Corporation and its subsidiary, Isabella Bank, and as Chairman from 2010 to 2021. As such, Mr. Maness advised the Corporation's Board of Directors, at its regular meeting held February 22, 2023, that he would not seek re-election to the Corporation's Board of Directors nor the appointment to the Board of Directors of Isabella Bank. Mr. Maness will continue to serve as a director through the Corporation's 2023 annual meeting of shareholders, which is when his current terms expire.

G. Charles Hubscher will reach the mandatory age for retirement according to the Corporation's bylaws in July 2023, after serving as a director for 19 years collectively between the Corporation and Isabella Bank. Mr. Hubscher also advised the Corporation's Board of Directors, at its regular meeting held February 22, 2023, that he would not seek re-election to the Corporation's Board of Directors nor the appointment to the Board of Directors of Isabella Bank. Mr. Hubscher will continue to serve as a director through the Corporation's 2023 annual meeting of shareholders, which is when his current term expires.