The cluster of open-market sales by both the CTO and a director, with no insider buying, is a mild negative signal. Monitor for additional insider selling or a broader pattern. The stock's strong run-up may be prompting insiders to take profits. Watch next 8-K for any material developments that could explain the timing.
Price Chart
Executive Summary
Two insiders at Coherent Corp. sold a combined $1.76M in open-market transactions over a one-week period. The CTO sold $814K and a director sold $945K. While the dollar amount is modest relative to the $53.3B market cap (0.003%), the cluster of open-market sales by both a senior executive and a board member warrants attention, especially given the stock's strong recent performance and elevated valuation.
Key Financial Metrics
Key Facts
- Chief Technology Officer Eng Julie Sheridan sold 2,800 shares at $291.42 for $814K on 2026-03-02
- Director Enrico Digirolomo sold 3,900 shares at $241.50 for $945K on 2026-03-06
- Total insider sales in cluster: $1.76M, representing ~0.003% of $53.3B market cap
- No insider purchases in the cluster window
- Stock has rallied significantly — COHR closed at $270.69 on 2026-09-01, up from $241.50 on 2026-03-06
Financial Impact
Insider sales of $1.76M are trivial relative to $53.3B market cap but notable as a cluster of open-market sales by both C-suite and board
Risk Factors
- Insider sales may signal management's view that the stock is fully valued
- No insider buying to offset the selling cluster
- Historical COHR reports show negative average T+20 alpha (-6.02%), suggesting the stock tends to underperform after our filings
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-COHR-1788394218907 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 15, 2026 16d ago | Insider Cluster | $289.93 $300.60 | ▲ +3.68% | ▲ +1.12% | $325.89 (+12.40%) |
Sep 11, 2026 21d ago | Insider Cluster | $305.37 $317.36 | ▲ +3.93% | ▲ +4.15% | $325.89 (+6.72%) |
Sep 4, 2026 28d ago | Insider Cluster | $281.86 $266.50 | ▼ −5.45% | ▼ −4.24% | $325.89 (+15.62%) |
Sep 3, 2026 29d ago | Insider Cluster | $264.41 $305.37 | ▲ +15.49% | ▲ +16.64% | $325.89 (+23.25%) |
Sep 3, 2026 29d ago | Insider Cluster | $264.41 $305.37 | ▼ −15.49% | ▼ −16.64% | $325.89 (−23.25%) |
Aug 31, 2026 4w ago | 8-K | $277.83 $301.88 | ▲ +8.66% | ▲ +8.80% | $325.89 (+17.30%) |
Jul 15, 2026 11w ago | Institutional Cluster | $299.38 $312.19 | ▲ +4.28% | ▲ +5.26% | $325.89 (+8.85%) |
Jun 20, 2026 14w ago | Institutional Cluster | $425.48 $380.56 | ▼ −10.56% | ▼ −8.49% | $325.89 (−23.41%) |
Jun 11, 2026 16w ago | Institutional Cluster | $363.58 $378.85 | ▲ +4.20% | ▲ +3.77% | $325.89 (−10.37%) |
Apr 28, 2026 22w ago | 8-K | $304.93 $344.67 | ▲ +13.03% | ▲ +9.92% | $325.89 (+6.87%) |
US Market Status
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