CHFC 2018 Proxy Statement

Ownership of Chemical Financial Common Stock Five Percent Shareholders The following table lists the only shareholders known by the Corporation to have been the beneficial owners of more than 5% of the outstanding shares of our common stock as of February 28, 2018: Amount and Nature of Beneficial Ownership of Common Stock (1) Name and Address of Beneficial Owner Sole Voting Power Shared Voting Power (2) Sole Dispositive Power Shared Dispositive Power (2) Total Beneficial Ownership Percent of Class BlackRock, Inc. (3) 7,332,661 — 7,487,927 — 7,487,927 10.5% 55 East 52nd Street New York, NY 10055 The Vanguard Group (4) 77,976 8,208 6,188,212 80,091 6,268,303 8.8% 100 Vanguard Blvd. Malvern, PA 19355 (1) The numbers of shares stated are based on information furnished by each shareholder listed and include shares beneficially owned by that shareholder under applicable regulations. Under these regulations, a beneficial owner of a security includes any person who, directly or indirectly, has or shares voting power or dispositive power with respect to the security. We have based our calculation of the percentage of beneficial ownership on 71,303,019 shares of common stock outstanding as of February 28, 2018. (2) These numbers include shares over which the listed shareholder is legally entitled to share voting or dispositive power by reason of joint ownership, trust, or other contract or property right. (3) Based on information filedwith the SECon Schedule 13G/Aon January 19, 2018. BlackRock, Inc., an investment management firm, in its role as investment advisor or manager, possesses investment and/or voting power over these shares of our common stock and may be deemed to be the beneficial owner of these shares. (4) Based on information filed with the SEC on Schedule 13G/A on February 9, 2018. The Vanguard Group, an investment management firm, in its role as investment advisor or manager, possesses investment and/or voting power over these shares of our common stock and may be deemed to be the beneficial owner of these shares. 19