BillionToOne, Inc. (BLLN)
Data as of , from SEC Form 4 filings.
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About BillionToOne, Inc. (BLLN)
BillionToOne Inc is a molecular diagnostics company. It offers a portfolio of ultrasensitive tests covering prenatal genetic testing, cancer therapy selection, and response monitoring, which are based on its Quantitative Counting Templates (QCT) molecular counting platform. The company's product portfolio comprises UNITY, a portfolio of prenatal testing products that can conduct fetal risk analysis without requiring a paternal sample; Northstar Select, a ultrasensitive liquid biopsy test that provides insights into appropriate therapies for stage III or IV cancer patients; and Northstar Response, a tissue-free, pan-cancer, liquid biopsy test that measures several genomic loci uniquely methylated in cancer to provide insight into dynamic changes in therapy response.
- MENLO PARK, CA
- 713
- 2025
- Nasdaq
BLLN Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 92 | 271,564 | $30.46M |
| Option exercise | 56 | 486,298 | |
| Bona-fide gift | 3 | 43,500 | |
BLLN insider transactions (Form 4)
13165 Form 4 filings on record, the earliest from Nov 10, 2025, newest first. Filing history page 3 of 3.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Akshay Rai | Grant or award | Common Stock | 8,333 footnote F1 | $0.00 | - | |
| Akshay Rai | Other | Common Stock | 2,676 | - footnote F3 | - | |
| Akshay Rai | Other | Common Stock | 1,784,414 | - footnote F3 | - | |
| Akshay Rai | Other | Common Stock | 11,009 | - footnote F5 | - | |
| Akshay Rai | Other | Common Stock | 1,784,414 | - footnote F5 | - | |
| Akshay Rai | Other | Class A Common Stock | 11,009 | - footnote F5 | - | |
| Akshay Rai | Other | Class A Common Stock | 1,784,414 | - footnote F5 | - | |
| Akshay Rai | Other | Series D Convertible Preferred Stock | 2,676 | - footnote F3 | - | |
| Akshay Rai | Other | Series D Convertible Preferred Stock | 1,784,414 | - footnote F3 | - | |
| ||||||
| Firat Ileri | Other | Common Stock | 640,727 | - footnote F3 | - | |
| Firat Ileri | Other | Common Stock | 18,845 | - footnote F3 | - | |
| Firat Ileri | Other | Common Stock | 2,015,118 | - footnote F3 | - | |
| Firat Ileri | Other | Common Stock | 2,451,665 | - footnote F3 | - | |
| Firat Ileri | Other | Common Stock | 2,580,833 | - footnote F3 | - | |
| Firat Ileri | Other | Common Stock | 640,727 | - footnote F10 | - | |
| Firat Ileri | Other | Common Stock | 18,845 | - footnote F10 | - | |
| Firat Ileri | Other | Common Stock | 2,015,118 | - footnote F10 | - | |
| Firat Ileri | Other | Common Stock | 2,631,664 | - footnote F10 | - | |
| Firat Ileri | Other | Common Stock | 2,580,833 | - footnote F10 | - | |
| Firat Ileri | Other | Class A Common Stock | 37,314 | - footnote F10 | - | |
| Firat Ileri | Other | Class A Common Stock | 640,727 | - footnote F10 | - | |
| Firat Ileri | Other | Class A Common Stock | 18,845 | - footnote F10 | - | |
| Firat Ileri | Other | Class A Common Stock | 2,015,118 | - footnote F10 | - | |
| Firat Ileri | Other | Class A Common Stock | 2,631,664 | - footnote F10 | - | |
| Firat Ileri | Other | Class A Common Stock | 2,580,833 | - footnote F10 | - | |
| Firat Ileri | Other | Series A-6 Convertible Preferred Stock | 28,981 | - footnote F3 | - | |
| Firat Ileri | Other | Series B-2 Convertible Preferred Stock | 640,727 | - footnote F3 | - | |
| Firat Ileri | Other | Series B-1 Convertible Preferred Stock | 18,845 | - footnote F3 | - | |
| Firat Ileri | Other | Series C Convertible Preferred Stock | 1,569,015 | - footnote F3 | - | |
| Firat Ileri | Other | Series D Convertible Preferred Stock | 446,103 | - footnote F3 | - | |
| Firat Ileri | Other | Series A-1 Convertible Preferred Stock | 20,000 | - footnote F3 | - | |
| Firat Ileri | Other | Series A-2 Convertible Preferred Stock | 33,000 | - footnote F3 | - | |
| Firat Ileri | Other | Series B-1 Convertible Preferred Stock | 2,261,377 | - footnote F3 | - | |
| Firat Ileri | Other | Series C Convertible Preferred Stock | 137,288 | - footnote F3 | - | |
| Firat Ileri | Other | Series A-6 Convertible Preferred Stock | 2,260,520 | - footnote F3 | - | |
| Firat Ileri | Other | Series B-2 Convertible Preferred Stock | 320,363 | - footnote F3 | - | |
| Firat Ileri | Grant or award | Common Stock | 8,333 footnote F1 | $0.00 | - | |
| Firat Ileri | Other | Common Stock | 28,981 | - footnote F3 | - | |
| Firat Ileri | Other | Common Stock | 37,314 | - footnote F10 | - | |
| ||||||
| Thomas S. Bremner | Grant or award | Common Stock | 8,333 footnote F1 | $0.00 | - | |
| Thomas S. Bremner | Other | Common Stock | 152,440 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 155,711 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 176,271 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 269,918 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 240,072 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 675,352 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 277,508 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Common Stock | 8,333 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 152,440 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 155,711 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 176,271 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 269,918 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 240,072 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 675,352 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Common Stock | 277,508 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 8,333 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 152,440 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 155,711 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 176,271 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 269,918 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 240,072 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 675,352 | - footnote F13 | - | |
| Thomas S. Bremner | Other | Class A Common Stock | 277,508 | - footnote F13 | - | |
| Thomas S. Bremner | Open-market purchase | Class A Common Stock | 4,016 | $60.00 | $241K | |
| Thomas S. Bremner | Open-market purchase | Class A Common Stock | 4,084 | $60.00 | $245K | |
| Thomas S. Bremner | Open-market purchase | Class A Common Stock | 3,462 | $60.00 | $208K | |
| Thomas S. Bremner | Open-market purchase | Class A Common Stock | 5,446 | $60.00 | $327K | |
| Thomas S. Bremner | Open-market purchase | Class A Common Stock | 6,867 | $60.00 | $412K | |
| Thomas S. Bremner | Open-market purchase | Class A Common Stock | 17,791 | $60.00 | $1.07M | |
| Thomas S. Bremner | Other | Series A-1 Convertible Preferred Stock | 1,352 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 114,117 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 16,747 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 20,224 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 121,688 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 17,858 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 16,165 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series A-1 Convertible Preferred Stock | 1,562 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 131,888 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 19,355 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 23,466 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series A-1 Convertible Preferred Stock | 1,864 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 157,404 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 23,100 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 87,550 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series A-1 Convertible Preferred Stock | 652 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 55,091 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 8,084 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 176,245 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series A-1 Convertible Preferred Stock | 5,988 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 505,570 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 74,195 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 89,599 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series A-1 Convertible Preferred Stock | 1,078 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C Convertible Preferred Stock | 91,003 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series C-1 Convertible Preferred Stock | 13,355 | - footnote F3 | - | |
| Thomas S. Bremner | Other | Series D Convertible Preferred Stock | 122,072 | - footnote F3 | - | |
| ||||||
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Common Stock | 2,819,490 | - footnote F7 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Class A Common Stock | 1,297,799 | - footnote F7 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Class A Common Stock | 242,216 | - footnote F7 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Class A Common Stock | 2,819,490 | - footnote F7 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series B-1 Convertible Preferred Stock | 1,177,800 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series C Convertible Preferred Stock | 242,216 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series A-1 Convertible Preferred Stock | 16,746 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series A-3 Convertible Preferred Stock | 19,985 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series A-6 Convertible Preferred Stock | 2,318,482 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series B-2 Convertible Preferred Stock | 320,363 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Series C-1 Convertible Preferred Stock | 143,914 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Common Stock | 1,177,800 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Common Stock | 242,216 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Common Stock | 2,819,490 | - footnote F2 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Common Stock | 1,297,799 | - footnote F7 | - | |
| NeoTribe Ventures I, L.P. - 10% Owner | Other | Common Stock | 242,216 | - footnote F7 | - | |
| ||||||
| Krishna Kittu Kolluri | Other | Common Stock | 242,216 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Common Stock | 2,819,490 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Class A Common Stock | 8,333 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Class A Common Stock | 1,297,799 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Class A Common Stock | 242,216 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Class A Common Stock | 2,819,490 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Series B-1 Convertible Preferred Stock | 1,177,800 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Series C Convertible Preferred Stock | 242,216 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Series A-1 Convertible Preferred Stock | 16,746 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Series A-3 Convertible Preferred Stock | 19,985 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Series A-6 Convertible Preferred Stock | 2,318,482 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Series B-2 Convertible Preferred Stock | 320,363 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Series C-1 Convertible Preferred Stock | 143,914 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Grant or award | Common Stock | 8,333 footnote F1 | $0.00 | - | |
| Krishna Kittu Kolluri | Other | Common Stock | 1,177,800 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Common Stock | 242,216 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Common Stock | 2,819,490 | - footnote F3 | - | |
| Krishna Kittu Kolluri | Other | Common Stock | 8,333 | - footnote F8 | - | |
| Krishna Kittu Kolluri | Other | Common Stock | 1,297,799 | - footnote F8 | - | |
| ||||||
Recent BLLN Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Bosch John Roderick Ten | Officer | 2,834 | $321K | View on EDGAR | |
| Oguzhan Atay | Member of immediate family of any of the foregoing | 5,334 |
BLLN insider trading FAQ
What is the latest insider trade for BLLN?
BillionToOne, Inc. (BLLN) had 26 insider filings in the last 90 days, with the most recent on 30 October 2026. The full record for BLLN runs to 65 Form 4 filings, the earliest from 10 November 2025. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying BLLN stock?
No insider purchases of BLLN were filed in the last 90 days. 11 purchases are on record for this company.
How many insiders are selling BLLN stock?
92 insider sales of BLLN were filed in the last 90 days, totaling $30.46M.
Where can I see BLLN SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects BLLN Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Oguzhan Atay view on EDGAR
- - Thomas P. Lynch view on EDGAR
- - Oguzhan Atay view on EDGAR
- - Oguzhan Atay view on EDGAR
- - Thomas P. Lynch view on EDGAR
- - Bosch John Roderick Ten view on EDGAR
- - David Tsao view on EDGAR
- - Oguzhan Atay view on EDGAR
- - David Tsao view on EDGAR
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Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Health Care
- Where BLLN's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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- BLLN on your watchlist
- Every BLLN Form 4 filing on record
- Up to 3 months of BLLN price history
- The daily trading plan of ranked insider buys, on a delay, with the plan archive