Insider · CIK 0001245155
Sonja Michelle Wilkerson
Files at: KOP. On EDGAR ↗
Reported trades — common stock
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 10, 2018 AForm 4 → | Sep 12, 6:39 pm EDT | Koppers Holdings Inc.KOP | 1,768 | — | — | 1,768 | — | plan? |
Reported trades — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Company | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 14, 2026 AForm 4 → | Sep 15, 4:20 pm EDT | Koppers Holdings Inc.KOP | 29 | — | — | 385 | — | |
| Jun 15, 2026 AForm 4 → | Jun 17, 4:07 pm EDT | Koppers Holdings Inc.KOP | 30 | — | — | 356 | — |