No immediate trading signal from this cluster — the dollar amounts are too small to indicate informed selling.
Price Chart
Executive Summary
Three insiders at BillionToOne, including CEO Oguzhan Atay and CTO David Tsao, sold a total of $538K in shares over a one-week window. The CTO exercised 20,000 options at $2.80/share simultaneously with open-market sales, suggesting a cashless exercise/hedge strategy. Relative to a $5.7B market cap, the cluster represents ~0.009% — far below the 0.1% threshold for materiality. Per the literature, insider sales clusters are weak predictors, and these sales appear liquidity-driven or tax-related, not based on negative non-public information.
Key Financial Metrics
Key Facts
- CEO Oguzhan Atay sold 2,700 shares for ~$339K on July 9.
- CTO David Tsao sold 16,015 shares total (including same-day option exercises) for ~$2.1M in gross proceeds; netting option cost of $56K for 20,000 shares exercised at $2.80.
- SVP of Lab Operations John ten Bosch sold 1,417 shares for ~$178K.
- Chief Product Officer Shan Sakakibara sold 174 shares for ~$22K.
- Total cluster value of $538K (open market) is ~0.009% of $5.7B market cap — well under the 0.1% materiality floor.
- No insider purchases occurred during the window.
Financial Impact
Total insider sales of $538K over 7 days; statistically negligible relative to $5.7B market cap
Risk Factors
- Insider selling at a ~$125 price near IPO or lockup expiry may signal eventual dilution if a secondary offering follows.
- Historical cluster of sells preceded by strong stock performance — normal profit-taking by insiders post-IPO.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-BLLN-1784185546495 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 30, 2026 26d ago | Insider Cluster | $105.76 | awaiting T+60 | — | $111.46 (−5.39%) |
Sep 28, 2026 28d ago | Insider Cluster | $118.18 | awaiting T+60 | — | $111.46 (+5.68%) |
Sep 23, 2026 4w ago | Insider Cluster | $124.90 | awaiting T+60 | — | $111.46 (+10.76%) |
Sep 22, 2026 4w ago | Institutional Cluster | $116.07 | awaiting T+60 | — | $111.46 (−3.97%) |
Sep 21, 2026 5w ago | Insider Cluster | $116.07 | awaiting T+60 | — | $111.46 (+3.97%) |
Sep 16, 2026 5w ago | Insider Cluster | $110.67 | awaiting T+60 | — | $111.46 (−0.72%) |
Sep 11, 2026 6w ago | Insider Cluster | $100.82 | awaiting T+60 | — | $111.46 (+10.56%) |
Sep 11, 2026 6w ago | Insider Cluster | $100.82 | awaiting T+60 | — | $111.46 (+10.56%) |
Aug 27, 2026 8w ago | Insider Cluster | $93.24 | awaiting T+60 | — | $111.46 (+19.55%) |
Aug 27, 2026 8w ago | Insider Cluster | $93.24 | awaiting T+60 | — | $111.46 (+19.55%) |
US Market Status
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