SEC Form 4 · accession 0001245155-26-000006
Koppers Holdings Inc. · KOP
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Sonja Michelle Wilkerson
Director
Period of report
Sep 14, 2026
Accepted (ET)
Sep 15, 2026 · 4:20 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001315257
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend Equivalent RightsF1,F2 | — | Sep 14, 2026 | A | 29 | A | — | — | Common Stock | 29 | 385 | D |
Explanation of responses
- F1The 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.
- F2Once 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.