CHFC 2018 Proxy Statement

Important Notice Regarding Delivery of Shareholder Documents The SEC has adopted rules that permit companies to satisfy the delivery requirements for proxy statements, annual reports or Notice of InternetAvailability of ProxyMaterials with respected to two or more shareholders sharing the same address by delivering a single proxy statement, annual report or Notice of Internet Availability of Proxy Materials addressed to those shareholder, unless we have received contrary instructions from one or more of the shareholders who share the same address. We will deliver on a one-time basis, promptly upon written or oral request from a shareholder at a shared address, a separate copy of our 2018 Proxy Statement, 2017 Annual Report to Shareholders and Notice of Internet Availability of Proxy Materials. Requests should be made to Chemical Financial Corporation, Attn: Dennis L. Klaeser, Chief Financial Officer, 235 E. Main Street, Midland, Michigan 48640, telephone (989) 839-5350. Shareholders sharing an address who are currently receiving multiple copies of the proxy statement, annual report to shareholders and Notice of Internet Availability of Proxy Materials may instruct us to deliver a single copy of such documents on an ongoing basis. Such instructions must be in writing, must be signed by each shareholder who is currently receiving a separate copy of the documents, must be addressed to Chemical Financial Corporation, Attn: Dennis L. Klaeser, Chief Financial Officer, 235 E. Main Street, Midland, Michigan 48640, and will continue in effect unless and until we receive contrary instructions as provided below. Any shareholder sharing an address may request to receive and instruct us to send separate copies of the proxy statement, annual report to shareholders and Notice of Internet Availability of Proxy Materials on an ongoing basis by written or verbal request to Chemical Financial Corporation, Attn: Dennis L. Klaeser, Chief Financial Officer, 235 E. Main Street, Midland, Michigan 48640, telephone (989) 839-5350.Wewill begin sending separate copies of such documents within thirty days of receipt of such instructions. Availability of Information Our combined 2017 Annual Report to Shareholders and Form 10-K Annual Report, including financial statements and financial statement schedules, but not the exhibits to the Form 10-K, and the 2018 Notice of Annual Meeting and Proxy Statement are available on the following website, www.proxydocs.com/CHFC or through the SEC's website at www.sec.gov. This information may be obtained without charge upon written request to Chemical Financial Corporation. Please direct your requests to Chemical Financial Corporation, 235 E. Main Street, Midland, Michigan 48640, Attn: Dennis L. Klaeser, Chief Financial Officer. Copies of exhibits to the Form 10-K may be requested at the cost of 30 cents per page from the Corporation. Your vote is important. Even if you plan to attend the meeting, PLEASE SIGN, DATE AND RETURN THE ENCLOSED PROXY PROMPTLY OR VOTE BY TELEPHONE OR THE INTERNET. 63