[Form 4] Koppers Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Ball M. LeRoy, CEO and Director of Koppers Holdings Inc. (KOP), reported a sale of 2,448 shares of Koppers common stock on 08/15/2025 at a weighted average price of $30.48 per share. Following the reported disposition, the filing shows beneficial ownership of 357,308.4007 shares held directly. The filing also discloses that 328 shares were acquired under the company Employee Stock Purchase Plan on 06/30/2025; those acquisitions were exempt under Rule 16b-3(c) and (d). The Form 4 was executed by an attorney-in-fact on 08/18/2025.

Insights

Corporate Governance Expert

TL;DR: Insider sale disclosed; ownership remains sizable and ESPP purchases were exempt.

The filing transparently documents an insider sale of 2,448 shares at a weighted average of $30.48 and confirms continued direct beneficial ownership of 357,308.4007 shares. The disclosure that 328 shares were acquired through the ESPP and treated as exempt under Rule 16b-3(c) and (d) is routine but important for compliance. The use of an attorney-in-fact to sign the form is noted and properly dated.

Securities Analyst

TL;DR: Transaction is routine insider selling with specific quantities and prices disclosed; no other material events reported.

The Form 4 provides precise transaction detail: date, quantity, and weighted average price. The remaining reported direct holding figure aids transparency for ownership calculations. There are no derivative transactions or amendments reported, and the ESPP purchase is explicitly identified, clarifying its exempt status under Rule 16b-3.

Insider Trade Summary

Net Seller: 2,448 shares ($74,615)

Net Sell 1 txn

Insider BALL M LEROY

Role CEO

Sold 2,448 shs ($75K)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,448	$30.48	$75K

Holdings After Transaction: Common Stock — 357,308.401 shares (Direct)

Footnotes (1)

1. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.32 to $30.50, inclusive. The reporting person undertakes to provide to the Securities and Exchange Commission, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price. Includes 328 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on June 30, 2025. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).

Form 4 Insider Transactions: What Each Field Means →

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BALL M LEROY

(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)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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

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	08/15/2025		S		2,448	D	$30.48(1)	357,308.4007(2)	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

Explanation of Responses:

1. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.32 to $30.50, inclusive. The reporting person undertakes to provide to the Securities and Exchange Commission, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price.

2. Includes 328 shares of Koppers Holdings Inc. common stock acquired pursuant to the Koppers Holdings Inc. Employee Stock Purchase Plan on June 30, 2025. These acquisitions were exempt under both Rule 16b-3(c) and Rule 16b-3(d).

	/s/Stephanie L. Apostolou, Attorney in Fact	08/18/2025
	** 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).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.