Koppers director granted 29 dividend rights

A Koppers Holdings director received a small grant of dividend equivalent rights tied to deferred RSUs, increasing her derivative holdings modestly.

Rhea-AI Filing Summary

Koppers Holdings Inc. (KOP) reported that director Sonja Michelle Wilkerson acquired 29.352 Dividend Equivalent Rights (DERs) on September 14, 2026 as a grant or award related to deferred compensation. Each DER is economically equivalent to one share of common stock, bringing her directly held DER balance to 385.202. These DERs correspond to additional time-based restricted stock units (RSUs) that will be paid in a lump sum or annual installments after her separation from service, in accordance with the company’s Director Deferred Compensation Plan. No Rule 10b5-1 trading plan is reported for this award.

Insider Trade Summary

Grant/Award: 29.352 shares

Grant/Award 1 txn

Insider WILKERSON SONJA MICHELLE

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Dividend Equivalent Rights F1, F2	29.352	$0.00	$0.00

Holdings After Transaction: Dividend Equivalent Rights — 385.202 contracts (Direct)

Footnotes (2)

1. F1. The dividend equivalent rights ("DERs") accrued with respect to additional time-based 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. F2. 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.

Key Figures

Dividend Equivalent Rights granted: 29.352 rights Total Dividend Equivalent Rights after transaction: 385.202 rights Underlying common stock per DER: 1 share equivalent per right +2 more

5 metrics

Dividend Equivalent Rights granted 29.352 rights Grant to director Sonja Michelle Wilkerson on September 14, 2026

Total Dividend Equivalent Rights after transaction 385.202 rights Directly owned by the director following the September 14, 2026 award

Underlying common stock per DER 1 share equivalent per right Each DER is the economic equivalent of one Koppers common share

Reported transaction price per DER $0.00 per right Recorded as a grant or award with no cash price on September 14, 2026

Underlying RSUs associated with grant 29.352 RSUs Underlying Common Stock units corresponding to the new DERs

Key Terms

Dividend Equivalent Rights, restricted stock units, Director Deferred Compensation Plan, separation from service

4 terms

Dividend Equivalent Rights financial

"The dividend equivalent rights ("DERs") accrued with respect to additional time-based restricted stock units"

Dividend equivalent rights are promises that mirror the cash payments shareholders get from a company’s profits, but they are paid to holders of certain awards (like stock options or restricted stock units) rather than to actual shares. Think of them as a paycheck top‑up that matches dividends while the award is not yet a real stock, and they matter to investors because they add to employee compensation costs and potential share dilution, affecting company profitability and per‑share value.

restricted stock units financial

"DERs accrued with respect to additional time-based restricted stock units ("RSUs") credited"

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 regulatory

"commencing on the May 31st next following the reporting person's separation from service"

FAQ

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

What insider transaction did KOP report for Sonja Michelle Wilkerson?

Koppers Holdings reported that director Sonja Michelle Wilkerson received a grant of 29.352 Dividend Equivalent Rights on September 14, 2026, tied to deferred time-based restricted stock units under the Director Deferred Compensation Plan.

How many Dividend Equivalent Rights does the KOP director hold after this transaction?

After the September 14, 2026 grant, Sonja Michelle Wilkerson holds a total of 385.202 Dividend Equivalent Rights, all reported as directly owned and economically equivalent to the same number of Koppers Holdings common shares.

What are Dividend Equivalent Rights in the KOP Form 4 filing?

Dividend Equivalent Rights (DERs) are described as accruing on time-based RSUs credited for deferred compensation, with each DER being the economic equivalent of one share of Koppers Holdings Inc. common stock.

When will the RSUs tied to the KOP director’s DERs be paid out?

Once released, the RSUs linked to these DERs will become payable under the Director Deferred Compensation Plan, either in a lump sum or annual installments starting on May 31 following the director’s separation from service, or May 31 of a later year the director elected.

Was the KOP director’s DER grant made under a Rule 10b5-1 plan?

No. The report indicates that no Rule 10b5-1 trading plan is affirmed for this transaction; it is reported simply as a grant or award of Dividend Equivalent Rights related to deferred compensation.

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

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Available on EDGAR 09/15/2026 - 04:20 PM Accepted by SEC EDGAR 09/15/2026 - 04:20 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^*

WILKERSON SONJA MICHELLE

(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)
09/14/2026

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
Dividend Equivalent Rights	(1)	09/14/2026		A		29.352		(2)	(2)	Common Stock	29.352	$0	385.202	D

Explanation of Responses:

1. The dividend equivalent rights ("DERs") accrued with respect to additional time-based 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.

Remarks:

	/s/ Stephanie L. Apostolou, Attorney in Fact	09/15/2026
	** 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)