David Tsao, Chief Technology Officer at BillionToOne, Inc. (BLLN), sold 20,000 shares at $105.90 ($2.2M) on 2026-10-05, disclosed to the SEC on 2026-10-07.
Scheduled sale ($2.2M) by Chief Technology Officer under a pre-arranged 10b5-1 plan. Pre-set trade — not a discretionary signal on the stock.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $105.56 | 555 | $59K | 2.7% |
| 2 | $105.90 | 866 | $92K | 4.2% |
| 3 | $106.10 | 400 | $42K | 2.0% |
| 4 | $107.19 | 1,909 | $205K | 9.5% |
| 5 | $107.47 | 2,200 | $236K | 10.9% |
| 6 | $108.39 | 4,284 |
| $464K |
| 21.5% |
| 7 | $108.53 | 4,916 | $534K | 24.7% |
| 8 | $109.00 | 2,921 | $318K | 14.7% |
| 9 | $109.14 | 1,829 | $200K | 9.2% |
| 10 | $110.08 | 20 | $2K | 0.1% |
| 11 | $110.09 | 100 | $11K | 0.5% |
| Total | $108.15 avg | 20,000 | $2.2M | 100% |
| Filing → |
| BLLN | SELL | 2026-08-27 | $1.0M | — | Filing → |
| BLLN | SELL | 2026-08-12 | $929K | — | Filing → |
| BLLN | SELL | 2026-07-15 | $2.5M | — | Filing → |