BLLN insider buying – BillionToOne, Inc.
5 insider purchases since 2016 worth $3.2M by 5 different insiders. Last 12 months: 0 purchases, $0. Most recent filing: 2025-11-12.
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| Bremner Thomas S Director | $2.5M 1× · 41,666 sh | 2025-11-07 2025-11-07 | – | 11,350 shares as of 2026-06-12 | Holds - never sold |
| Johnson Nancy JoAnn Officer | $414,000 1× · 6,900 sh | 2025-11-07 2025-11-07 | 3× · $3.3M last 2026-07-16 | 18,966 shares as of 2026-07-20 | Sold part |
| Rai Akshay Director | $150,000 1× · 2,500 sh | 2025-11-07 2025-11-07 | – | 14,026 shares as of 2026-06-12 | Holds - never sold |
| Tsao David Officer | $60,000 1× · 1,000 sh | 2025-11-07 2025-11-07 | 6× · $8.9M last 2026-09-24 | 1,000 shares as of 2026-09-28 | Sold part |
| ten Bosch John Roderick Officer | $48,000 1× · 800 sh | 2025-11-07 2025-11-07 | 8× · $1.7M last 2026-09-24 | 22,219 shares as of 2026-09-28 | Sold part |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 0 | – | – | 30 | $46.0M |
| 2025 | 5 | $3.2M | 5 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2025-11-12 | ten Bosch John Roderick | Officer | 800 | $60.00 | $48,000 | +2.2% | SEC |
| 2025-11-12 | Tsao David | Officer | 1,000 | $60.00 | $60,000 | SEC | |
| 2025-11-12 | Rai Akshay | Director | 2,500 | $60.00 | $150,000 | +22.7% | SEC |
| 2025-11-12 | Johnson Nancy JoAnn | Officer | 6,900 | $60.00 | $414,000 | +23.8% | SEC |
| 2025-11-10 | Bremner Thomas S | Director | 41,666 | $60.00 | $2.5M | +6.4% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Atay Oguzhan | CEO | 10,999 | $120.64 | $1.3M | Pre-planned (10b5-1) | SEC |
| 2026-09-28 | ten Bosch John Roderick | Officer | 1,416 | $120.00 | $169,920 | Pre-planned (10b5-1) | SEC |
| 2026-09-28 | Tsao David | Officer | 3,333 | $125.00 | $416,625 | Pre-planned (10b5-1) | SEC |
| 2026-09-23 | ten Bosch John Roderick | Officer | 1,416 | $106.61 | $150,960 | Pre-planned (10b5-1) | SEC |
| 2026-09-21 | Lynch Thomas P. | Officer | 35,112 | $110.33 | $3.9M | Pre-planned (10b5-1) | SEC |
| 2026-09-16 | Atay Oguzhan | CEO | 30,331 | $99.91 | $3.0M | Pre-planned (10b5-1) | SEC |
| 2026-09-11 | ten Bosch John Roderick | Officer | 1,416 | $97.54 | $138,117 | Pre-planned (10b5-1) | SEC |
| 2026-09-11 | Tsao David | Officer | 20,000 | $98.77 | $2.0M | Pre-planned (10b5-1) | SEC |
| 2026-09-10 | Lynch Thomas P. | Officer | 20,000 | $99.99 | $2.0M | Pre-planned (10b5-1) | SEC |
| 2026-08-27 | ten Bosch John Roderick | Officer | 1,417 | $100.00 | $141,700 | Pre-planned (10b5-1) | SEC |
| 2026-08-27 | Tsao David | Officer | 10,000 | $100.00 | $1.0M | Pre-planned (10b5-1) | SEC |
| 2026-08-12 | ten Bosch John Roderick | Officer | 1,417 | $92.86 | $131,583 | Pre-planned (10b5-1) | SEC |
| 2026-08-12 | Tsao David | Officer | 10,000 | $92.86 | $928,600 | Pre-planned (10b5-1) | SEC |
| 2026-08-07 | Atay Oguzhan | CEO | 15,539 | $150.03 | $2.3M | Pre-planned (10b5-1) | SEC |
| 2026-08-05 | Atay Oguzhan | CEO | 45,000 | $137.07 | $6.2M | Pre-planned (10b5-1) | SEC |
Showing the latest 15 of 30 sales of $50,000+ since 2016.
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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