Stocks › KOP
Koppers KOP
US equityMarket cap rank #3598
$29.97 −$9.67 (-24.39%)
Market closed · Nov 6, 8:10 pm ET · Last extended-hours $30.09 +0.40%
Open$29.47
Prev close$39.64
Day range$26.86 – $33.51
Volume354.6K
Market cap$566.78M
P/E (TTM)–
Dividend yield1.13%
Ownership & positioning
Who holds it, who is betting against it, and where the big money is moving
Institutional ownership101.2%-2.54 pts vs. prior quarter
Institutions holding265+3 vs. prior quarter
Insider trades (recent)32 buys / 18 sellsNet buying
Short interest3.91% of floatDays to cover 4.8 · as of 15 Oct 2026
Short-sale volume share23.9%5-day average of daily volume
Short-sale volume as % of daily volume
Large-order net flow, last 20 sessions
Net of large-order buying minus selling, in USD. Over this window: +$191.0K (8 inflow days, 12 outflow days).
Net flow by order size, last 20 sessions
Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.
The five largest holders on file together own 38.4% of shares outstanding.
Largest holders
By investor type
Reported short interest has risen from 3.71% to 3.91% of float over the last 6 biweekly reports (31 Jul 2026 to 15 Oct 2026).
Recent institutional activity
| Holder | Type | Period | Share change | New stake |
|---|---|---|---|---|
| Dimensional Fund Advisors | Mutual Fund | 2026/Q3 | +28,280 | 6.7% |
| SummerHaven Investment Management, LLC | Mutual Fund | 2026/Q3 | +19,229 | 0.1% |
| Nuveen Asset Management LLC | Insurance Company | 2026/Q3 | +14,036 | 0.2% |
| Simcoe Capital Management, LLC | Hedge Fund | 2026/Q3 | +471,730 | 7.5% |
| American Century Investment Management | Mutual Fund | 2026/Q3 | +313,066 | 4.5% |
| Invesco Capital Management LLC | Mutual Fund | 2026/Q3 | +148,119 | 1.7% |
| Pacer Advisors, Inc. | Mutual Fund | 2026/Q3 | +114,072 | 0.6% |
| State Street Global Advisors | Mutual Fund | 2026/Q3 | +52,289 | 4.3% |
| Dimensional Fund Advisors | Mutual Fund | 2026/Q3 | +45,891 | 6.5% |
| Denali Advisors, LLC | Mutual Fund | 2026/Q3 | +41,127 | 0.5% |
| J.P. Morgan Asset Management, Inc. | Mutual Fund | 2026/Q3 | +32,766 | 0.6% |
| Arrowstreet Capital, Limited Partnership | Mutual Fund | 2026/Q3 | +27,128 | 1.0% |
| Columbia Management Investment Advisers, LLC | Mutual Fund | 2026/Q3 | +23,868 | 1.5% |
| Creative Planning, Inc. | Mutual Fund | 2026/Q3 | +21,816 | 0.2% |
| XTX Markets Limited | Private Company | 2026/Q3 | +21,785 | 0.2% |
Institutional buy/sell activity by reporting period, largest moves first.
Insider transactions
| Date | Insider | Title | Transaction | Shares | Price | Held after |
|---|---|---|---|---|---|---|
| 13 Sep 2026 | Sonja Wilkerson | Independent Director | Other Derivative Acquisition | +29 | – | 385 |
| 13 Sep 2026 | Andrew Sandifer | Independent Director | Other Derivative Acquisition | +13 | – | 117 |
| 13 Sep 2026 | Xudong Feng | Independent Director | Other Derivative Acquisition | +32 | – | 445 |
| 13 Sep 2026 | David Motley | Independent Director | Other Derivative Acquisition | +19 | – | 316 |
| 30 Aug 2026 | Leroy Ball | Chairperson & CEO | Other Disposition | -200 | – | 429,355 |
| 30 Aug 2026 | Leroy Ball | Chairperson & CEO | Open Market Disposition | -4,000 | $45.96 | 429,355 |
| 18 Aug 2026 | Leroy Ball | Chairperson & CEO | Open Market Disposition | -3,000 | $45.84 | 433,555 |
| 11 Aug 2026 | Stephen Lucas | Open Market Disposition | -1,308 | $44.55 | 19,492 | |
| 10 Aug 2026 | James Sullivan | Former President | Open Market Disposition | -7,500 | $50.00 | 82,898 |
| 9 Aug 2026 | Bradley Pearce | Chief Accounting Officer | Open Market Disposition | -2,000 | $51.01 | 41,037 |
| 6 Aug 2026 | James Sullivan | Former President | Open Market Disposition | -80,000 | $51.22 | 90,398 |
| 17 Jun 2026 | Leroy Ball | Chairperson & CEO | Open Market Disposition | -3,412 | $43.90 | 436,243 |
| 14 Jun 2026 | Sonja Wilkerson | Independent Director | Other Derivative Acquisition | +30 | – | 356 |
| 14 Jun 2026 | Andrew Sandifer | Independent Director | Other Derivative Acquisition | +13 | – | 103 |
| 14 Jun 2026 | Xudong Feng | Independent Director | Other Derivative Acquisition | +34 | – | 412 |
| 14 Jun 2026 | David Motley | Independent Director | Other Derivative Acquisition | +20 | – | 296 |
| 10 Jun 2026 | Leroy Ball | Chairperson & CEO | Other Disposition | -300 | – | 439,655 |
| 10 Jun 2026 | Leroy Ball | Chairperson & CEO | Open Market Disposition | -4,141 | $41.34 | 439,655 |
| 2 Jun 2026 | Xudong Feng | Independent Director | Other Disposition | -5,695 | – | 23,209 |
| 12 May 2026 | Leroy Ball | Chairperson & CEO | Open Market Disposition | -2,659 | $42.55 | 444,096 |
From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.
Short interest, by report
| Report date | Shares short | % of float | Days to cover |
|---|---|---|---|
| 15 Oct 2026 | 739,634 | 3.9% | 4.8 |
| 30 Sep 2026 | 800,969 | 4.2% | 4.5 |
| 15 Sep 2026 | 769,075 | 4.1% | 4.8 |
| 31 Aug 2026 | 950,642 | 5.0% | 5.8 |
| 14 Aug 2026 | 781,631 | 4.1% | 3.1 |
| 31 Jul 2026 | 713,171 | 3.7% | 4.6 |
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