SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Sullivan James A. (Last) (First) (Middle) 436 SEVENTH AVENUE (Street) PITTSBURGH PA 15219 (City) (State) (Zip)	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) President and COO
	3. Date of Earliest Transaction (Month/Day/Year) 01/04/2024
	4. If Amendment, Date of 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
	Rule 10b5-1(c) Transaction Indication Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

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(1)	01/04/2024		A		12,531	A	$0.00	107,316.738	D
Common Stock	01/05/2024		M		15,868	A	(2)	123,184.738	D
Common Stock	01/05/2024		M		301(3)	A	$0.00(3)	123,485.738	D
Common Stock	01/05/2024		F		11,232	D(4)	$47.32	112,253.738	D

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 Securities Underlying Derivative Security (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: 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 Units	(2)	01/04/2024		A		8,077		(5)	(5)	Common Stock	8,077	$0.00	15,868	D
Restricted Stock Units	(2)	01/04/2024		A		8,645		(6)	(6)	Common Stock	8,645	$0.00	10,581	D
Restricted Stock Units	(2)	01/04/2024		A		5,530		(7)	(7)	Common Stock	5,530	$0.00	5,530	D
Dividend Equivalent Rights	(8)	01/04/2024		A		263		(8)	(8)	Common Stock	263	$0.00	660	D
Restricted Stock Units	(2)	01/05/2024		M			15,868	(9)	(9)	Common Stock	15,868	$0.00	0	D
Dividend Equivalent Rights	(10)	01/05/2024		M			301(10)	(10)	(10)	Common Stock	301	$0.00	359	D

Explanation of Responses:

1. The reporting person was awarded time-based restricted stock units on January 4, 2024, which will vest in annual installments of one-third each over three years.

2. Restricted stock units convert into common stock on a one-for-one basis.

3. Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.

4. Shares surrendered to the issuer by the reporting person as payment for the tax withholding related to the vesting of time-based restricted stock units ("RSUs") and performance share units ("PSUs").

5. On January 4, 2021, the reporting person was granted PSUs for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied.

6. On January 4, 2022, the reporting person was granted PSUs for which the performance criteria for the two-year performance period from January 1, 2022 through December 31, 2023 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2025. If the Company's total shareholder return over the three-year period of January 1, 2022 through December 31, 2024 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

7. On January 4, 2023, the reporting person was granted PSUs for which the performance criteria for the one-year performance period from January 1, 2023 through December 31, 2023 have been satisfied. All of the restricted stock units reported here are subject to vesting based on the continued service of the reporting person through January 5, 2026. If the Company's total shareholder return over the three-year period of January 1, 2023 through December 31, 2025 is negative, then the cumulative number of units that may vest for such three-year period will be capped at 150% of the target number.

8. The DERs accrued with respect to additional PSUs credited to the reporting person with respect to PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

9. Represents previously granted performance share units for which the performance criteria for the three-year performance period from January 1, 2021 through December 31, 2023 have been satisfied, as reported in Table II above.

10. These DERs were released in connection with the vesting of RSUs and PSUs granted on January 4, 2021, January 4, 2022, and January 4, 2023. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

	/s/Stephanie L. Apostolou, Attorney in Fact	01/08/2024
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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