The CEO's sales are mechanically tied to option exercises and follow a pattern seen in prior periods — not a fresh bearish signal. The dollar amount is trivial relative to market cap. No actionable trading signal from this cluster alone. Monitor the next 10-Q for any fundamental deterioration that would justify a more cautious stance.
Price Chart
Executive Summary
A cluster of insider selling at Twist Bioscience over the past week, led by CEO Emily Leproust who sold ~$3.2M in open-market shares alongside option exercises, while the CAO and a director also sold smaller amounts. The total open-market sales of ~$4.0M represent ~0.1% of the $4.2B market cap, falling at the low end of the proportionality band. The CEO's sales are part of a regular pattern tied to option exercises, reducing their informational signal per the academic literature.
Key Financial Metrics
Key Facts
- CEO Emily Leproust sold 49,516 shares open-market for ~$3.2M across May 26-28, all tied to same-day option exercises at $8.82 or $0 strike
- CAO Robert Werner sold 800 shares for ~$50K on May 26
- Director Melissa Starovasnik sold 3,000 shares for ~$201K across May 26 and May 28
- Total open-market sales in the cluster: ~$4.0M, or ~0.1% of market cap
- Non-cash option exercises (M transactions) by CEO totaled $0 economic value for 65,769 shares
- Prior 30-day insider activity showed 5 sells totaling $3.4M, consistent with ongoing selling pattern
Financial Impact
Total open-market sales of ~$4.0M, representing ~0.1% of $4.2B market cap
Risk Factors
- CEO selling alongside option exercises could be misinterpreted as bearish by the market
- If the company reports disappointing earnings in the next quarter, the insider sales may be viewed in hindsight as informed
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-1780344427670 |
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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