Koppers Holdings Inc. (KOP) has 11 SEC Form 4 insider filings on record in the last 90 days. No insider purchases were filed — 7 sales totalling $5.0M. Most recent filing: Sept. 15, 2026.
| Date | Insider | Value | Shares | Stake | Pre-planned | Links |
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| Sept. 15, 2026 filed Sept. 14, 2026 | WILKERSON SONJA MICHELLE Director | $0 | 29 | 0% | No | |
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| Sept. 15, 2026 filed Sept. 14, 2026 | Feng Xudong Director | $0 | 33 | 0% | No | |
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| Sept. 15, 2026 filed Sept. 14, 2026 | MOTLEY DAVID L Director | $0 | 20 | 0% | No | |
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| Sept. 15, 2026 filed Sept. 14, 2026 | Sandifer Andrew D Director | $0 | 14 | 0% | No | |
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| Sept. 1, 2026 filed Aug. 31, 2026 | BALL M LEROY CEO | −$183,840 | 4,200 | −1% | No | |
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Showing the 5 most recent of 11 filings in the last 90 days.
Form 4 is the filing company officers, directors and 10% shareholders must submit to the SEC within two business days of trading their own company's stock. Open-market purchases generally carry more signal than sales, which are often scheduled in advance. More on how this works.
Real-time Telegram alerts the moment a Form 4 is filed. Filings shown here are delayed by 72 hours.
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