The CEO's sale, while modest in size, is the most concerning element given his position. Lynch's sales are largely explained by cashless option exercises, reducing their informational value. Monitor for any subsequent filings (e.g., earnings, guidance changes) that might explain the selling pattern.
Price Chart
Executive Summary
A cluster of insider sales at BillionToOne, Inc. (BLLN) totaling $1.09M over a 7-day window, led by Chairman/CEO Oguzhan Atay, SVP John Roderick ten Bosch, and officer Thomas P. Lynch. The sales are a mix of open-market dispositions and derivative exercises, with Lynch's sales directly following option exercises, suggesting a cashless exercise pattern rather than purely directional selling. The total value is approximately 0.33% of the company's $326M market cap, falling in the modest range, and the presence of derivative exercises reduces the bearish signal.
Key Financial Metrics
Key Facts
- Three insiders sold shares totaling $1.09M in open-market transactions from September 14-21, 2026.
- Chairman and CEO Oguzhan Atay sold 1,700 shares at $98.64 for $166K.
- SVP of Laboratory Operations John Roderick ten Bosch sold 1,400 shares at $106.61 for $151K.
- Officer Thomas P. Lynch sold 35,112 shares at ~$110.30 for $3.87M, but this was preceded by derivative exercises of 35,112 shares at lower strike prices, resulting in a net cashless exercise pattern.
- The cluster's total open-market sale value of $1.09M represents about 0.33% of the company's $326M market cap.
- No 10b5-1 plan indication was provided for any of the sales.
Financial Impact
Insider sales of $1.09M represent a modest 0.33% of market cap, a modest but notable signal given the CEO's involvement.
Risk Factors
- CEO selling ahead of potential negative news or earnings miss.
- Lack of 10b5-1 plans for any sales increases the possibility of opportunistic selling.
Investment Themes
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-BLLN-1790200288547 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 30, 2026 26d ago | Insider Cluster | $105.76 | awaiting T+60 | — | $113.67 (−7.48%) |
Sep 28, 2026 28d ago | Insider Cluster | $118.18 | awaiting T+60 | — | $113.67 (+3.82%) |
Sep 23, 2026 4w ago | Insider Cluster | $124.90 | awaiting T+60 | — | $113.67 (+8.99%) |
Sep 22, 2026 4w ago | Institutional Cluster | $116.07 | awaiting T+60 | — | $113.67 (−2.07%) |
Sep 21, 2026 5w ago | Insider Cluster | $116.07 | awaiting T+60 | — | $113.67 (+2.07%) |
Sep 16, 2026 5w ago | Insider Cluster | $110.67 | awaiting T+60 | — | $113.67 (−2.71%) |
Sep 11, 2026 6w ago | Insider Cluster | $100.82 | awaiting T+60 | — | $113.67 (+12.75%) |
Sep 11, 2026 6w ago | Insider Cluster | $100.82 | awaiting T+60 | — | $113.67 (+12.75%) |
Aug 27, 2026 8w ago | Insider Cluster | $93.24 | awaiting T+60 | — | $113.67 (+21.91%) |
Aug 27, 2026 8w ago | Insider Cluster | $93.24 | awaiting T+60 | — | $113.67 (+21.91%) |
US Market Status
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