Apostolou Stephanie L (CIK 1806249) reported 7 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-02). Recent activity: Buy KOP (7,223 shares), Buy KOP (174 shares), Sell KOP (3,149 shares), Buy KOP (9,876 shares), Buy KOP (4,666 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-02 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Buy | 7,223 | $0 |
| 2026-03-02 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Buy | 174 | $0 |
| 2026-03-02 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Sell | 3,149 | $117,269 |
| 2026-01-06 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Buy | 9,876 | $0 |
| 2026-01-06 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Buy | 4,666 | $0 |
| 2026-01-06 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Buy | 240 | $0 |
| 2026-01-06 | Koppers Holdings Inc. (KOP) | Chief Legal&Sus Officer & Sec. | Sell | 5,757 | $155,036 |
Source: SEC Form 4 filings · as of 2026-03-02