This cluster is too small relative to market cap to warrant a directional trade. Monitor for any upcoming INSM earnings or pipeline catalysts that could explain the timing, but treat these sales as routine portfolio diversification. No bearish signal.
Price Chart
Executive Summary
Three top INSM insiders—CEO, CFO, and CMO—collectively sold $1.29M in open-market sales over a 7-day window. The total value is ~0.006% of INSM's $22.7B market cap, well below the 0.1% materiality threshold, making this a routine liquidity-driven cluster. Historical calibration shows prior INSM reports have underperformed significantly (avg T+20 alpha -21.65%), reinforcing that this filing warrants a neutral, low-impact read.
Key Financial Metrics
Key Facts
- CEO Lewis William sold 7,605 shares for ~$778K on June 3, 2026
- CFO Bonstein Sara sold 2,404 shares for ~$246K on June 3, 2026
- CMO Flammer Martina sold 4,424 shares total (~$455K) across June 3 and June 5, 2026
- Total cluster value of $1.29M represents ~0.006% of INSM's $22.7B market cap
- All sales were open-market (code S), with no 10b5-1 plan disclosure in the filing
Financial Impact
Total insider sales of $1.29M, equivalent to ~0.006% of market cap — immaterial
Risk Factors
- Insider sales could accelerate if a negative catalyst (e.g., FDA setback) emerges, but current volume is negligible
- Historical INSM reports show poor predictive accuracy (0% win rate at T+20), so even a larger cluster would need independent confirmation
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-INSM-1780690509017 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 19, 2026 6w ago | Insider Cluster | $130.66 $119.92 | ▼ −8.22% | ▼ −6.70% | $109.99 (−15.82%) |
Aug 12, 2026 7w ago | Insider Cluster | $126.33 $129.41 | ▲ +2.44% | ▲ +4.19% | $109.99 (−12.93%) |
Aug 6, 2026 8w ago | 8-K | $132.55 $126.68 | ▼ −4.43% | ▼ −5.03% | $109.99 (−17.02%) |
Jul 24, 2026 10w ago | Institutional Cluster | $106.92 $125.77 | ▲ +17.63% | ▲ +14.00% | $109.99 (+2.87%) |
Jul 21, 2026 10w ago | ANALYST-UPGRADE | $108.62 $128.46 | ▲ +18.27% | ▲ +15.70% | $109.99 (+1.26%) |
Jul 16, 2026 11w ago | 8-K | $107.46 $126.33 | ▲ +17.56% | ▲ +13.94% | $109.99 (+2.35%) |
Jun 26, 2026 13w ago | Insider Cluster | $104.74 $106.92 | ▲ +2.08% | ▲ +2.36% | $109.99 (+5.01%) |
Jun 5, 2026 16w ago | Insider Cluster | $94.17 $111.54 | ▲ +18.45% | ▲ +16.81% | $109.99 (+16.80%) |
Jun 5, 2026 16w ago | Insider Cluster | $94.17 $111.54 | ▲ +18.45% | ▲ +16.81% | $109.99 (+16.80%) |
May 15, 2026 19w ago | S-3ASR | $107.15 $95.52 | ▼ −10.85% | ▼ −12.44% | $109.99 (+2.65%) |
US Market Status
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