The $6.64M insider selling cluster is too small relative to TWST's $9.4B market cap to be actionable. The COO's sales coincide with option exercises, suggesting routine tax-related selling rather than a bearish view. Monitor for any larger insider sales or a Form 144 filing that would indicate a planned distribution. The stock's strong recent performance (+14.35% avg T+20 on prior reports) and 94% analyst bullish consensus suggest the current insider activity is not a red flag.
Price Chart
Executive Summary
Three Twist Bioscience insiders — CEO Emily Leproust, President/COO Patrick Finn, and Director Katryn Blake — sold a combined $6.64M in open-market shares over a 7-day window. The CEO's $2.5M sale and the COO's $3.87M sale are the largest, and the cluster represents ~0.07% of the $9.4B market cap, which is below the 0.1% materiality threshold. While the cluster includes multiple C-suite executives, the dollar amount is trivial relative to market cap, and the COO's sales coincide with derivative exercises, suggesting a tax-planning or liquidity motive rather than a bearish signal. The historical calibration shows strong past returns on TWST reports, but this cluster is too small to warrant a directional call.
Key Financial Metrics
Key Facts
- CEO Emily Leproust sold 20,000 shares for $2.50M on 2026-08-12
- President/COO Patrick Finn sold 33,354 shares for $3.87M on 2026-08-18 (also exercised 23,355 options)
- Director Katryn Blake sold 2,200 shares for $275K on 2026-08-12
- Total cluster value: $6.64M, representing ~0.07% of $9.4B market cap
- COO Finn's sales partially offset by derivative exercises — likely liquidity/vesting-driven
Financial Impact
Total insider sales of $6.64M represent ~0.07% of market cap — below the 0.1% materiality threshold
Risk Factors
- Insider selling could accelerate if the stock continues to rally, creating overhead supply
- COO Finn's multiple tranches at declining prices ($122.58 down to $115.90) suggest aggressive selling into strength
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-1787292388464 |
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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