Koppers (KOP)
Supplier of railroad crossties, utility poles, and wood-preservation chemicals across North America.
$46.10
vs last close0.00 (0.00%)
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13F · 13D/G · Form 4
| Institutions | 104.67% | 19.79M shares | |
|---|---|---|---|
| 221 holders · as of Jun 30, 2026 | |||
| Insiders | 22.87% | 4.33M shares | |
| 21 holders · as of Sep 1, 2026 | |||
| Adds to | 127.54% | ||
18.91M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
These groups come from separate filings that can overlap, so they add to 127.54%; nothing is left for Other.
13F, as of Jun 30, 2026
221 holders · 19.79M shares · 36 new positions · 109 increased · 69 reduced · 19 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 3.05M | 16.12% | +2.5K | Aug 7, 2026 |
| Simcoe Capital Management, LLC | 1.42M | 7.49% | +471.7K | Aug 14, 2026 |
| Dimensional Fund Advisors LP | 1.24M | 6.54% | +45.9K | Aug 11, 2026 |
| Pzena Investment Management LLC | 1.06M | 5.61% | −148.1K | Aug 7, 2026 |
| Fuller & Thaler Asset Management, Inc. | 943.3K | 4.99% | −35.3K | Aug 12, 2026 |
| LSV Asset Management | 941.9K | 4.98% | +15.9K | Aug 6, 2026 |
| American Century Companies Inc | 848.1K | 4.48% | +313.1K | Aug 12, 2026 |
| Vanguard Capital Management LLC | 812.6K | 4.30% | −27.8K | Aug 13, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 15.30% | 2.95M | 13G | Apr 24, 2026 |
| Simcoe Capital Management, LLCincl. SDR Partners, LLC, Jacobowitz Jeffrey +3 more | 7.00% | 1.35M | 13D | May 19, 2026 |
| Pzena Investment Management LLC | 6.10% | 1.22M | 13G | Apr 28, 2025 |
| Vanguard Capital Management | 5.08% | 983.6K | 13G | Apr 30, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 31, 2026 | M. Leroy Balldirector, officer: CEO | Sale | 4,000 | $45.96 | 429,555 |
| Aug 19, 2026 | M. Leroy Balldirector, officer: CEO | Sale | 3,000 | $45.84 | 433,555 |
| Aug 12, 2026 | Stephen G. Lucasofficer: SVP, Culture and Engagement | Sale | 1,308 | $44.55 | 34,345 |
| Aug 11, 2026 | James A. Sullivanofficer: President and CTO | Sale | 7,500 | $50.00 | 82,898 |
| Aug 10, 2026 | Bradley A. Pearceofficer: CAO | Sale | 2,000 | $51.01 | 41,037 |
| Aug 7, 2026 | James A. Sullivanofficer: President and CTO | Sale · 2 lots | 80,000 | $50.01 | 90,398 |
| Jun 18, 2026 | M. Leroy Balldirector, officer: CEO | Sale | 3,412 | $43.90 | 436,243 |
| Jun 11, 2026 | M. Leroy Balldirector, officer: CEO | Sale | 4,141 | $41.34 | 439,955 |
| May 13, 2026 | M. Leroy Balldirector, officer: CEO | Sale | 2,659 | $42.55 | 444,096 |
| Mar 17, 2026 | M. Leroy Balldirector, officer: CEO | Sale | 2,489 | $37.91 | 447,459 |
House and Senate disclosures
Not reported.