// company-profile
BillionToOne, Inc.
BLLN// activity-summary
Recent insider activity is bullish. Over the last 30 days, 7 insiders purchased shares (net $56K). Buying was led by Tsao David.
// 90-day insight
Over the last 90 days, BillionToOne, Inc. insiders bought $56K across 7 transactions with no open-market sales.
- Most active insider: Tsao David with 15 transactions totaling $2.2M.
- Largest single sale: $463K by Johnson Nancy JoAnn on Jun 9, 2026.
- 100% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of BillionToOne, Inc. as of 2026-03-31
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 15, 2026 | Tsao David | BLLN | Sale10b5 | 2,889 | $103.68 | $300K |
| Jun 15, 2026 | Tsao David | BLLN | Option Exercise10b5 | 10,000 | $2.80 | $28K |
| Jun 15, 2026 | Tsao David | BLLN | Sale10b5 | 1,704 | $100.37 | $171K |
| Jun 15, 2026 | Tsao David | BLLN | Sale10b5 | 2,398 | $103.63 | $249K |
| Jun 15, 2026 | Tsao David | BLLN | Sale10b5 | 563 | $104.32 | $59K |
45 more transactions hidden
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