The cluster is too small relative to market cap to be material. The simultaneous C-suite selling on Aug 21 at identical prices strongly suggests a 10b5-1 plan execution or blackout-window opening, not a coordinated bearish view. Monitor for any upcoming earnings or material news that could have triggered a blackout window closing, but no immediate trading action is warranted.
Price Chart
Executive Summary
A cluster of insider sales at Twist Bioscience, totaling ~$2.50M over a week, with the CEO, CFO, COO, and other senior executives all selling on the same day (Aug 21). While the dollar amount is modest relative to the $9.3B market cap (~0.027%), the unanimity of C-suite selling on a single date is notable. The sales are likely driven by a shared blackout-window opening or 10b5-1 plan, not a bearish signal, given the academic literature showing cluster sales are not predictive of negative returns.
Key Financial Metrics
Key Facts
- CEO Emily Leproust sold 6,639 shares for ~$923K on Aug 21
- CFO Adam Laponis sold 1,965 shares for ~$273K on Aug 21
- COO Patrick Finn sold 4,046 shares for ~$563K on Aug 21
- Chief Accounting Officer Robert Werner sold 854 shares for ~$120K on Aug 24
- Total cluster value ~$2.50M, representing ~0.027% of $9.3B market cap
- All C-suite sales occurred on Aug 21 at the same price ($139.066), suggesting a coordinated or plan-driven event
Financial Impact
Total insider sales of ~$2.50M, a trivial 0.027% of market cap
Risk Factors
- Insider sales could be misinterpreted as a bearish signal by the market
- If the sales are not plan-driven, they may indicate management's lack of confidence in near-term prospects
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-TWST-1787728174018 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 10, 2026 21d ago | Insider Cluster | $127.22 $166.99 | ▲ +31.26% | ▲ +31.60% | $187.45 (+47.34%) |
Aug 27, 2026 5w ago | Insider Cluster | $153.10 $128.71 | ▼ −15.93% | ▼ −16.20% | $187.45 (+22.44%) |
Aug 25, 2026 5w ago | Insider Cluster | $151.42 $132.06 | ▼ −12.79% | ▼ −12.25% | $187.45 (+23.79%) |
Aug 21, 2026 6w ago | Insider Cluster | $145.59 $141.38 | ▼ −2.89% | ▼ −3.37% | $187.45 (+28.75%) |
Aug 20, 2026 6w ago | Insider Cluster | $136.23 $153.10 | ▲ +12.38% | ▲ +11.27% | $187.45 (+37.60%) |
Aug 14, 2026 6w ago | Insider Cluster | $124.41 $140.80 | ▲ +13.17% | ▲ +14.36% | $187.45 (+50.67%) |
Aug 14, 2026 6w ago | Insider Cluster | $124.41 $140.80 | ▼ −13.17% | ▼ −14.36% | $187.45 (−50.67%) |
Aug 12, 2026 7w ago | Insider Cluster | $125.29 $136.23 | ▲ +8.73% | ▲ +10.70% | $187.45 (+49.61%) |
Aug 12, 2026 7w ago | 144 | $125.29 $136.23 | ▲ +8.73% | ▲ +10.70% | $187.45 (+49.61%) |
Aug 11, 2026 7w ago | Insider Cluster | $123.12 $116.10 | ▼ −5.70% | ▼ −5.30% | $187.45 (+52.25%) |
US Market Status
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