BLLN Insider Trading Activity and SEC Form 4 Filings
BLLN insider trading summary
Over the past 12 months, insiders at BillionToOne, Inc. (BLLN) reported 189 sales worth $53.0M by 6 insiders and 11 open-market purchases worth $3.2M by 6 insiders on SEC Form 4. Net insider selling was $49.8M.
Latest BLLN insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $11K (100 @ $113.17) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $266K (2,450 @ $108.39) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $219K (1,992 @ $110.13) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $34K (300 @ $112.19) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $251K (2,320 @ $108.24) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $114K (1,063 @ $107.33) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $98K (917 @ $107.31) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $353K (3,241 @ $109.04) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $125K (1,130 @ $110.77) |
| Nov 2, 2026 | David Tsao | Chief Technology Officer | Sell | $353K (3,234 @ $109.15) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.