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 * Tronsberg-Deihle Louann E   2. Issuer Name and Ticker or Trading Symbol Koppers Holdings Inc. [KOP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Treasurer (Last) (First) (Middle) 436 SEVENTH AVENUE 3. Date of Earliest Transaction (Month/Day/Year) 03/02/2018 (Street) PITTSBURGH, PA 15219 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 03/02/2018   A   1,064 A $ 0 14,644.3512 D   Common Stock 03/02/2018   M   243 A $ 0 (1) 14,887.3512 D   Common Stock 03/02/2018   A   11,760 A (2) $ 0 26,647.3512 D   Common Stock 03/02/2018   F   5,429 D (3) $ 41.6 21,218.3512 (4) 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

Employee Stock Options (Rights to Buy)

$ 41.6

03/02/2018

A

4,063

(5)

03/02/2028

Common Stock

4,063

$ 0

4,063

D

Restricted Stock Units

(1)

03/02/2018

M

243

(6)

(6)

Common Stock

243

$ 0

732

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Tronsberg-Deihle Louann E 436 SEVENTH AVENUE PITTSBURGH, PA 15219			Treasurer

Signatures

/s/Steven R. Lacy, Attorney-in-Fact		03/06/2018
**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 units convert into common stock on a one-for-one basis.
(2)	Represents previously granted performance share units for which the performance criteria for the three-year performance period of 2015 through 2017 have been satisfied.
(3)	Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of time-based and performance-based restricted stock units.
(4)	Includes 75 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan ("ESPP") as of December 29, 2017, the date of the latest available statement of the reporting person's ESPP Holdings. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).
(5)	The reporting person was granted stock options on March 2, 2018, which will vest in four equal annual installments, with the first installment vesting on March 2, 2019.
(6)	On March 3, 2017, the reporting person was granted restricted stock units, vesting in four equal annual installments beginning on the first anniversary of the grant date.

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