The Vanguard Group 13D and 13G filings for Koppers Holdings Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2024-02-13 5:08 pm Purchase | 2023-12-29 | 13G | Koppers Holdings Inc. KOP | The Vanguard Group | 2,366,913 11.370% | 8,277 (+0.35%) | Filing |
| 2023-02-09 11:25 am Sale | 2022-12-30 | 13G | Koppers Holdings Inc. KOP | The Vanguard Group | 2,358,636 11.290% | -10,542 (-0.44%) | Filing |
| 2022-02-10 08:22 am Purchase | 2021-12-31 | 13G | Koppers Holdings Inc. KOP | The Vanguard Group | 2,369,178 11.120% | 155,702 (+7.03%) | Filing |
| 2021-02-10 11:10 am Purchase | 2020-12-31 | 13G | Koppers Holdings Inc. KOP | The Vanguard Group | 2,213,476 10.510% | 32,687 (+1.50%) | Filing |
| 2020-02-11 7:24 pm Purchase | 2019-12-31 | 13G | Koppers Holdings Inc. KOP | The Vanguard Group | 2,180,789 10.530% | 43,786 (+2.05%) | Filing |