Tsao David (CIK 2087127) reported 17 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-17). Recent activity: Buy BLLN (10,000 shares), Buy BLLN (10,000 shares), Sell BLLN (1,704 shares), Sell BLLN (2,361 shares), Sell BLLN (2,816 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 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 | $171,034 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,361 | $239,765 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,816 | $289,411 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,889 | $299,544 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 230 | $24,029 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 600 | $59,245 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 1,000 | $100,053 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,461 | $249,473 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,978 | $305,539 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2,398 | $248,502 |
| 2026-06-17 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 563 | $58,730 |
| 2025-11-12 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2.3M | $0 |
| 2025-11-12 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 2.3M | $0 |
| 2025-11-12 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Sell | 2.3M | $0 |
| 2025-11-12 | BillionToOne, Inc. (BLLN) | Chief Technology Officer | Buy | 1,000 | $60,000 |
Source: SEC Form 4 filings · as of 2026-06-17