Sakakibara Shan Riku (CIK 2088547) reported 7 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-06-26). Recent activity: Buy BLLN (4,000 shares), Sell BLLN (4,000 shares), Sell BLLN (4,000 shares), Sell BLLN (4,000 shares), Sell BLLN (4,000 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-26 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Buy | 4,000 | $34,600 |
| 2026-06-26 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Sell | 4,000 | $440,000 |
| 2026-06-26 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Sell | 4,000 | $440,000 |
| 2026-06-10 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Sell | 4,000 | $385,800 |
| 2026-06-10 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Sell | 4,000 | $400,000 |
| 2025-11-12 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Sell | 220,000 | $0 |
| 2025-11-12 | BillionToOne, Inc. (BLLN) | Chief Product Officer | Buy | 220,000 | $0 |
Source: SEC Form 4 filings · as of 2026-06-26