[Form 4] Koppers Holdings Inc. Insider Trading Activity

Rhea-AI Filing Summary

Reporting person: Director Feng Xudong reported transactions in Koppers Holdings Inc. (KOP) on Form 4. The filing shows 33.338 dividend equivalent rights (DERs) credited in connection with deferred compensation tied to restricted stock units (RSUs), which are economically equivalent to Koppers common shares. After the reported transaction the filing lists 264.474 shares beneficially owned by the reporting person.

Payment and timing: The DERs accrue with respect to additional RSUs and, once released, will be payable under the Director Deferred Compensation Plan either as a lump sum or in annual installments beginning the May 31 following separation from service or a later elected year. The filing also corrects prior reporting by including 30.109 DERs that were inadvertently not previously reported.

Positive

• Correction included for 30.109 DERs that were inadvertently omitted previously, improving disclosure accuracy
• Clarity provided on payment timing and election options under the Director Deferred Compensation Plan

Negative

• Prior reporting omission of 30.109 DERs indicates an administrative reporting error

Insights

Corporate Governance Expert

TL;DR: Routine director deferred-compensation accruals and a corrective disclosure of previously unreported DERs; governance processes likely adjusted.

The Form 4 documents non-cash accruals under the company's Director Deferred Compensation Plan rather than open-market purchases or sales. The disclosure of 33.338 DERs reflects additional compensation-crediting events tied to RSUs and clarifies the director's deferred payout elections. The inclusion of 30.109 previously unreported DERs is a corrective note that suggests an administrative reporting gap was addressed; the filing does not indicate any change in control, market trading, or material shift in beneficial ownership percentages.

Securities Analyst

TL;DR: Impact is neutral for investors; transaction is compensation-related and not a market disposition.

The reported items are dividend equivalent rights that are the economic equivalent of common shares and will convert to payables under deferral elections. Because the entry records accruals rather than open-market transactions, there is no immediate dilution or sale pressure reflected. The adjustment adding 30.109 DERs corrects prior reporting but is immaterial to overall outstanding shares based on information in this filing alone.

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^*

Feng Xudong

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2025

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

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
Dividend Equivalent Rights	(1)	09/15/2025		A		33.338		(2)	(2)	Common Stock	33.338	$0	264.474(3)	D

Explanation of Responses:

1. The dividend equivalent rights ("DERs") accrued with respect to additional restricted stock units ("RSUs") credited to the reporting person with respect to deferred compensation. Each DER is the economic equivalent of one share of Koppers Holdings Inc. common stock.

2. Once released, the RSUs corresponding to these DERs will become payable according to the election of payment designation that was filed by the reporting person subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan"). Such payment will be either lump sum or in annual installments commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan) or, if later, and elected by the reporting person at the time he/she first elects to defer any payment under the Plan, May 31st of the year specified by the reporting person.

3. Includes 30.109 DERs that inadvertently were not previously reported.

Remarks:

	/s/ Stephanie L. Apostolou, Attorney in Fact	09/17/2025
	** 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.

FAQ

What did Feng Xudong report on the Form 4 for KOP?

The filing reports 33.338 dividend equivalent rights (DERs) credited related to additional RSUs and shows 264.474 shares beneficially owned following the transaction.

What are dividend equivalent rights (DERs) in this filing?

The filing states each DER is the economic equivalent of one share of Koppers common stock and accrues with respect to deferred RSUs.

When will the DERs be paid out under the plan?

DERs corresponding to RSUs will be payable per the reporting person's election under the Director Deferred Compensation Plan either as a lump sum or in annual installments starting the May 31 following separation from service or a later elected year.

Does this Form 4 reflect a purchase or sale of KOP stock?

No. The Form 4 reports compensation-related accruals (DERs) tied to RSUs rather than open-market purchases or dispositions.

Was there any correction in this filing?

Yes. The filing includes 30.109 DERs that were inadvertently not previously reported.