VANGUARD GROUP INC 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 |
| 2026-03-27 10:17 am Sale | 2026-03-13 | 13G | KOPPERS HOLDINGS, INC. KOP | VANGUARD GROUP INC | 0 0.000% | -1,539,485 (Position Closed) | Filing |
| 2025-10-31 11:04 am Sale | 2025-09-30 | 13G | KOPPERS HOLDINGS, INC. KOP | VANGUARD GROUP INC | 1,539,485 7.800% | -382,519 (-19.90%) | Filing |
| 2025-04-30 11:23 am Sale | 2025-03-31 | 13G | KOPPERS HOLDINGS, INC. KOP | VANGUARD GROUP INC | 1,922,004 9.380% | -444,909 (-18.80%) | Filing |
| 2024-02-13 5:08 pm Purchase | 2023-12-29 | 13G | KOPPERS HOLDINGS, INC. KOP | VANGUARD GROUP INC | 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 | VANGUARD GROUP INC | 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 | VANGUARD GROUP INC | 2,369,178 11.120% | 155,702 (+7.03%) | Filing |