The CTO's $4M sale is the dominant signal in this cluster, but at 0.47% of market cap it falls just below the 'significant' materiality threshold. Given the consistent selling pattern (over $8M in the last ~30 days) and the lack of any insider buying, traders should monitor for upcoming earnings or operational updates that may have prompted the selling.
Price Chart
Executive Summary
Two Koppers insiders (President/CTO and CAO) sold a combined ~$107K in open-market transactions over a 7-day window. The President/CTO's sale of ~$4M on August 7 dominates the cluster by dollar value, representing ~0.46% of KOP's $870M market cap. While the dollar amount is modest relative to company size, the CTO's sale is notable in absolute terms and follows a pattern of recent insider selling ($4.1M in prior 30 days). The cluster is net selling, but the total value is below the 0.5% threshold for significant materiality, and the CAO's sale is trivial.
Key Financial Metrics
Key Facts
- President and CTO James A. Sullivan sold 79,900 shares at $50.01 on 2026-08-07, totaling ~$4.0M
- CAO Bradley A. Pearce sold 2,000 shares at $51.01 on 2026-08-10, totaling ~$102K
- Total cluster value of ~$4.1M represents ~0.47% of KOP's $870M market cap
- Prior 30-day insider activity showed $4.1M in sales, extending a consistent selling pattern
- No open-market purchases in the cluster; all transactions are sales
Financial Impact
Insider sales totaling ~$4.1M, or ~0.47% of market cap
Risk Factors
- Insider sales may be liquidity-driven or part of a 10b5-1 plan, reducing their informational value
- The CAO's $102K sale is trivial and may reflect routine portfolio management
- No insider buying to counterbalance the selling pattern
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-KOP-1786525581534 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 23, 2026 3d ago | Press Release | $40.18 | awaiting T+5 | — | $39.83 (−0.87%) |
Oct 22, 2026 4d ago | SC 13D/A | $40.18 | awaiting T+5 | — | $39.83 (+0.87%) |
Oct 19, 2026 7d ago | SC 13G/A | $42.91 $39.83 | ▲ +7.18% | ▲ +7.03% | $39.83 (+7.18%) |
Oct 8, 2026 18d ago | SC 13G/A | $44.24 $43.44 | ▼ −1.81% | ▼ −1.53% | $39.83 (−9.97%) |
Aug 20, 2026 9w ago | Insider Cluster | $45.19 $46.56 | ▲ +3.03% | ▲ +2.56% | $39.83 (−11.86%) |
Aug 13, 2026 10w ago | Insider Cluster | $47.14 $45.19 | ▼ −4.14% | ▼ −2.77% | $39.83 (−15.51%) |
Aug 12, 2026 10w ago | Insider Cluster | $46.22 $45.88 | ▼ −0.74% | ▲ +1.23% | $39.83 (−13.83%) |
Aug 11, 2026 10w ago | Insider Cluster | $45.34 $44.90 | ▲ +0.97% | ▲ +0.53% | $39.83 (+12.15%) |
May 11, 2026 24w ago | 8-K | $43.08 $40.39 | ▼ −6.24% | ▼ −6.16% | $39.83 (−7.54%) |
May 8, 2026 24w ago | 8-K | $43.99 $42.41 | ▲ +3.59% | ▲ +5.06% | $39.83 (+9.46%) |
US Market Status
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