Tsao David — Chief Technology Officer
Insider trading activity for Tsao David sourced from SEC EDGAR Form 4 filings.
Overview
- Title: Chief Technology Officer
- Company: BillionToOne, Inc.
- Total insider trades: 49
- Total buy volume: $84K
- Total sell volume: $10.2M
- Last trade: Oct 7, 2026
Recent Trades
| Date | Insider | Ticker / Company | Type | Shares | Value |
|---|---|---|---|---|---|
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | OTHER | 10,000 | $28K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | OTHER | 10,000 | $28K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 100 | $11K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 1,829 | $200K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 4,916 | $534K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 2,200 | $236K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 400 | $42K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 555 | $59K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 20 | $2K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 2,921 | $318K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 4,284 | $464K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 1,909 | $205K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 866 | $92K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | OTHER | 10,000 | $28K |
| Oct 5, 2026 | Tsao David | BLLN BillionToOne, Inc. | OTHER | 10,000 | $28K |
| Oct 5, 2026 | Tsao David | BBLLN BillionToOne, Inc. | OTHER | 1,750 | $184K |
| Sep 24, 2026 | Tsao David | BLLN BillionToOne, Inc. | OTHER | 3,333 | $9K |
| Sep 24, 2026 | Tsao David | BLLN BillionToOne, Inc. | SELL | 3,333 | $417K |
| Sep 24, 2026 | Tsao David | BLLN BillionToOne, Inc. | OTHER | 3,333 | $9K |
| Sep 24, 2026 | Tsao David | BBLLN BillionToOne, Inc. | SELL | 3,333 | $417K |