The cluster is small relative to market cap and dominated by a single insider's cashless option exercise/sale pattern, which is typical for tax planning. Monitor for any 8-K or press release that could explain the timing — the stock's recent +23% run may simply be providing a favorable exit window. No immediate bearish read-through given the proportionality and academic evidence that cluster sales are not predictive.
Price Chart
Executive Summary
Four Twist Bioscience insiders, including CEO Emily Leproust and President/COO Patrick Finn, sold a total of $8.48M in stock over a 7-day window. The cluster is dominated by the President/COO's $11.0M in sales (including cashless exercise of options) and the CEO's $2.5M sale. While the dollar amount is modest relative to the $9.0B market cap (~0.09%), the concentration of C-suite selling at elevated prices near all-time highs warrants attention, though the academic literature finds cluster sales are not reliably informative.
Key Financial Metrics
Key Facts
- 4 insiders sold a total of $8.48M in TWST stock over 7 days
- CEO Emily Leproust sold 20,000 shares for $2.50M on 2026-08-12
- President/COO Patrick Finn sold ~78,355 shares for $11.0M (including cashless option exercises) on 2026-08-18
- Director Katryn Blake sold 2,200 shares for $275K on 2026-08-12
- VP Dennis Cho sold 14,205 shares for $1.84M on 2026-08-19
- Total sales represent ~0.09% of TWST's $9.0B market cap
- Stock is up ~23% in the past 2 weeks and trading near all-time highs
Financial Impact
Total insider sales of $8.48M represent ~0.09% of market cap — below the 0.1% materiality threshold
Risk Factors
- C-suite selling at elevated prices could signal peak sentiment or insider caution
- CEO and President/COO selling simultaneously may raise governance questions
- Stock's recent parabolic move (+23% in 2 weeks) increases mean-reversion risk
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-1787379007205 |
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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