On September 15, 2023, Sonia M. Dumbleton notified Financial Institutions, Inc. that she will retire from her position as Senior Vice President, Controller, and Principal Accounting Officer effective March 22, 2024. Over the succeeding six months, the responsibilities of the Controller function will be transitioned to Sandra L. Byers, who has been promoted to Deputy Controller effective October 2, 2023. Prior to joining the Company as Assistant Controller in May 2021, Ms. Byers held consulting positions with Robert Half and Kei Advisors, LLC.

From 2016 to 2019, she served as Finance and Treasury Manager with global manufacturer Hardinge, Inc. Ms. Byers also spent 12 years in the banking industry, including with First Niagara Financial Group, HSBC Bank USA, Inc. and M&T Bank Corporation, where she began her career in 2000. Ms. Byers earned her Bachelor?s of Science in Accounting from The State University of New York at Buffalo.