Kevin Washington - 13 Jun 2025 Form 4 Insider Report for Koppers Holdings Inc. (KOP)

Role: VP, External Relations
Signature: /s/Stephanie L. Apostolou, Attorney in Fact
Issuer symbol: KOP
Transactions as of: 13 Jun 2025
Net transactions value: -$26,102
Form type: 4
Filing time: 16 Jun 2025, 16:21:37 UTC
Previous filing: 26 Mar 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Washington Kevin	VP, External Relations	436 SEVENTH AVENUE, PITTSBURGH	/s/Stephanie L. Apostolou, Attorney in Fact	16 Jun 2025	0001932214

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	KOP	Common Stock	Options Exercise	$0	+33	+0.38%	$0.000000	8,769	13 Jun 2025	Direct	F1
transaction	KOP	Common Stock	Tax liability	$26,102	-818	-9.3%	$31.91	7,951	13 Jun 2025	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	KOP	Dividend Equivalent Rights	Options Exercise	$0	-33	-55%	$0.000000	27	13 Jun 2025	Common Stock	33		Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents shares acquired upon release of dividend equivalent rights ("DERs"), as reported in Table II, on a one-for-one basis.
F2	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").
F3	These DERs were released in connection with the vesting of RSUs granted on June 13, 2022. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.