🕵️ Koppers Holdings Inc. ($KOP)
SEC insider & ownership activity, last 12 months · CIK 1315257 · every row links its SEC filing
Over the last 12 months insiders sold $5.6M with no open-market buying against it. James A. Sullivan sold $4.4M in discretionary trades (Aug). 1 planned sale is pending, the largest $4.0M (James A. Sullivan). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 4 sellers, $5.6M (14 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| James A. Sullivan | 0 | – | 3 | $4.4M | Aug 11, 2026 |
| Ball M. Leroy | 0 | – | 9 | $1.1M | Aug 31, 2026 |
| Bradley A. Pearce | 0 | – | 1 | $102K | Aug 10, 2026 |
| Stephen G. Lucas | 0 | – | 1 | $58K | Aug 12, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15.3% | 13G | Apr 24, 2026 | filing ↗ | |
| Simcoe Capital Management, LLC | 7.0% | 13D | May 12, 2026 | filing ↗ | |
| Jacobowitz Jeffrey | 7.0% | 13D | May 12, 2026 | filing ↗ | |
| Simcoe Management Company, LLC | 6.8% | 13D | May 12, 2026 | filing ↗ | |
| Simcoe Partners L P | 6.4% | 13D | May 12, 2026 | filing ↗ | |
| Pzena Investment Management LLC | 6.1% | 13G | Apr 28, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Stephen G. Lucas | $58K | Aug 12, 2026 | filing ↗ |
| James A. Sullivan | $375K | Aug 11, 2026 | filing ↗ |
| Bradley A. Pearce | $102K | Aug 10, 2026 | filing ↗ |
| James A. Sullivan | $4.0M | Aug 7, 2026 | filing ↗ |
| Ball M. Leroy | $92K | Mar 2, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Aug 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 11, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 11, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 11, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Exit or disposal costs (2.05) | May 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 7, 2026 | filing ↗ |
| Shareholder vote (5.07) | May 7, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Earnings (2.02) | Feb 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 26, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 5, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 5, 2026 | filing ↗ |
| Other events (8.01) | Jan 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 5, 2026 | filing ↗ |
| Earnings (2.02) | Nov 7, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 7, 2025 | filing ↗ |
| Officer/director changes (5.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Officer/director changes (5.02) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Exit or disposal costs (2.05) | Nov 8, 2024 | filing ↗ |