Koppers director awarded 3,280 RSUs

Sandifer Andrew D reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Sandifer Andrew D reported acquisition or exercise transactions in this Form 4 filing.

Koppers Holdings Inc. director Andrew D. Sandifer reported receiving a grant of 3,280 Restricted Stock Units (RSUs), each representing the right to receive one share of common stock on a one-for-one basis. Following this award, he directly holds 10,137 RSUs tied to Koppers common stock.

The RSUs are governed by the Koppers Holdings Inc. Director Deferred Compensation Plan. They will be paid in either a lump sum or annual installments starting on May 31 following his separation from service, or on a later May 31 if he previously elected a different year under the plan.

Insider Trade Summary

Grant/Award: 3,280 shares

Grant/Award 1 txn

Insider Sandifer Andrew D

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Stock Units	3,280	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 10,137 contracts (Direct)

Footnotes (2)

1. F1. Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis.
2. F2. The RSUs 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.

Key Figures

RSUs granted: 3,280 units RSUs after grant: 10,137 units RSU conversion ratio: 1 share per unit

3 metrics

RSUs granted 3,280 units Restricted Stock Units granted on 2026-05-07

RSUs after grant 10,137 units Total Restricted Stock Units held following transaction

RSU conversion ratio 1 share per unit Each RSU represents the right to receive one share of common stock

Key Terms

Restricted Stock Units, Director Deferred Compensation Plan, separation from service

3 terms

Restricted Stock Units financial

"Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Director Deferred Compensation Plan financial

"subject to the Koppers Holdings Inc. Director Deferred Compensation Plan (the "Plan")."

separation from service financial

"commencing on the May 31st next following the reporting person's separation from service (as defined under the Plan)"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Andrew D. Sandifer report for Koppers (KOP)?

Andrew D. Sandifer reported receiving a grant of 3,280 Restricted Stock Units in Koppers. These RSUs are derivative awards that convert into common stock on a one-for-one basis, rather than an open-market stock purchase or sale.

How many Koppers RSUs does Andrew D. Sandifer hold after this Form 4 filing?

After the reported transaction, Andrew D. Sandifer directly holds 10,137 Restricted Stock Units in Koppers. This total reflects his position in RSUs that are each linked to one share of Koppers common stock under the company’s compensation arrangements.

What do the Koppers Restricted Stock Units reported by Andrew D. Sandifer represent?

The Restricted Stock Units represent the right to receive Koppers common stock on a one-for-one basis. They are not shares today but promises of future stock delivery, subject to the terms of the company’s Director Deferred Compensation Plan and related elections.

When will Andrew D. Sandifer’s Koppers RSUs reported on this Form 4 be paid?

The RSUs will be paid in a lump sum or annual installments starting on the May 31 following his separation from service, or on May 31 of a later year that he elected. These timing rules come from the Koppers Director Deferred Compensation Plan.

Is the Koppers (KOP) Form 4 transaction an open-market trade?

No, the filing shows a grant or award acquisition of 3,280 Restricted Stock Units, coded as transaction type A. This reflects an equity-based award under company plans rather than an open-market purchase or sale of Koppers common stock.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/11/2026 - 04:15 PM Learn about SEC filing dates

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^*

Sandifer Andrew D

(Last) (First) (Middle)

436 SEVENTH AVENUE

(Street)

PITTSBURGH PENNSYLVANIA 15219

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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
Restricted Stock Units	(1)	05/07/2026		A		3,280		(2)	(2)	Common Stock	3,280	$0	10,137	D

Explanation of Responses:

1. Restricted Stock Units ("RSUs") represent the right to receive shares of common stock on a one-for-one basis.

2. The RSUs 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.

Remarks:

	/s/ Stephanie L. Apostolou, Attorney in Fact	05/11/2026
	** 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.
* Form 4: SEC 1474 (03-26)