| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| BALL M LEROY | CEO, Director | 436 SEVENTH AVENUE, PITTSBURGH | /s/Stephanie L. Apostolou, Attorney in Fact | 18 Aug 2025 | 0001229771 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | KOP | Common Stock | Sale | $74,615 | -2,448 | -0.68% | $30.48 | 357,308 | 15 Aug 2025 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | 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. |
| F2 | 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). |