It has been a mixed year for BillionToOne, Inc. insiders: $3.2 million bought by six people and $48.4 million sold by six, so more selling than buying overall.
Biggest single buyer: Bremner Thomas S, Director, with roughly $1.1 million.
On the institutional side, 156 funds reported holding BLLN at the end of Q2 2026, and more funds bought than sold. Quarter by quarter: 2 quarters in a row of net selling by insiders. Insiders bought in 1 of the last 7 full quarters.
| Filed | Insider | Role | Type | Shares | Price | Value | Source |
|---|---|---|---|---|---|---|---|
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 866 | $105.90 | $92K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 2,921 | $109.00 | $318K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 2,200 | $107.47 | $236K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 4,916 | $108.53 | $534K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 1,829 | $109.14 | $200K | SEC |
| Oct 7, 2026 | ten Bosch John Roderick | Executive Officer | Sell | 1,417 | $105.15 | $149K | SEC |
| Oct 7, 2026 | ten Bosch John Roderick | Executive Officer | Sell | 1,417 | $105.15 | $149K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 1,909 | $107.19 | $205K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 4,284 | $108.39 | $464K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 20 | $110.08 | $2K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 555 | $105.56 | $59K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 400 | $106.10 | $42K | SEC |
| Oct 7, 2026 | Tsao David | Executive Officer | Sell | 100 | $110.09 | $11K | SEC |
| Sep 30, 2026 | Atay Oguzhan | CEO | Sell | 2,666 | $120.64 | $322K | SEC |
| Sep 30, 2026 | Atay Oguzhan | CEO | Sell | 8,333 | $120.64 | $1.0M | SEC |
In the last 12 months BillionToOne, Inc. insiders made open-market purchases worth about $3.2 million and sales worth about $48.4 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
The most recent open-market insider trade in BLLN was filed on 2026-10-07.
156 investment managers reported holding BLLN in SEC Form 13F filings for Q2 2026.
No congressional trades in BLLN were reported in the past two years. The full list is free on CapitalSnitch.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1). Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).