Tsao David (CIK 2087127) reported 39 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-11). Recent activity: Buy BLLN (10,000 shares), Buy BLLN (10,000 shares), Sell BLLN (10,000 shares), Sell BLLN (10,000 shares), Buy BLLN (20,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-11 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-09-11 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-09-11 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 10,000 | $975,400 |
| 2026-09-11 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 10,000 | $1.0M |
| 2026-09-08 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 20,000 | $0 |
| 2026-09-08 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 20,000 | $0 |
| 2026-08-27 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-08-27 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 10,000 | $1.0M |
| 2026-08-12 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-08-12 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 10,000 | $928,600 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 1,102 | $135,441 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,477 | $306,760 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,415 | $301,633 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 3,185 | $400,819 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 821 | $104,175 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 1,138 | $139,795 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,274 | $281,314 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 1,725 | $215,028 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 3,835 | $482,285 |
| 2026-07-15 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 1,028 | $130,448 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 10,000 | $28,000 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 1,704 | $171,030 |
来源：SEC Form 4 申报文件 · 截至 2026-09-11