FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Rathbun Robert   2. Issuer Name and Ticker or Trading Symbol CHEMICAL FINANCIAL CORP [CHFC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner _____ Officer (give title below) __X__ Other (specify below) Officer of Principal Bus. Unit (Last) (First) (Middle) 333 W. FORT STREET, SUITE 1800 3. Date of Earliest Transaction (Month/Day/Year) 02/27/2019 (Street) DETROIT, MI 48226 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/27/2019   M   217.37 (1) A $ 0 14,178.37 D   Common Stock 02/27/2019   F   74.37 (2) D $ 46.48 14,104 D   Common Stock 02/27/2019   M   373.89 (1) A $ 0 14,477.89 D   Common Stock 02/27/2019   F   126.89 (2) D $ 46.48 14,351 D   Common Stock 02/28/2019   M   3,857 (3) A $ 0 18,208 D   Common Stock 02/28/2019   F   1,126 (4) D $ 45.83 17,082 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Service-Based Units

(1)

02/27/2019

M

212

(1)

(1)

Common Stock

212

$ 0

848

D

Restricted Stock Service-Based Units

(1)

02/27/2019

M

367

(1)

(1)

Common Stock

367

$ 0

1,465

D

Restricted Stock Performance Units

(3)

02/28/2019

M

4,286

(3)

(3)

Common Stock

3,857

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Rathbun Robert 333 W. FORT STREET, SUITE 1800 DETROIT, MI 48226				Officer of Principal Bus. Unit

Signatures

/s/ Kimberly K. Martin, His Attorney-in-Fact		03/01/2019
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Restricted stock service-based units converted into shares of common stock at the end of the first year of a 5-year vesting period. Dividend equivalents accrued on the restricted stock service-based units.
(2)	Shares withheld to satisfy applicable withholding taxes in connection with the conversion of restricted stock service-based units.
(3)	Restricted stock performance units converted into shares of common stock upon the attainment by the Company of certain financial performance criteria upon completion of the year ended December 31, 2018 and the reporting person's satisfaction of the service requirement as of February 28, 2019. Each restricted stock performance unit was converted to 0.9 share of common stock, as performance targets were achieved at below the targeted level.
(4)	Shares withheld to satisfy applicable withholding taxes in connection with conversion of restricted stock performance units.

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