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About BillionToOne, Inc. (BLLN)
BillionToOne, Inc. files with the SEC under CIK 0002070849 and is classified as medical laboratories. It is grouped with Health Care companies on this site. Its offering priced on 6 November 2025 and it trades on 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)
19365 Form 4 filings on record, the earliest from Nov 10, 2025, newest first. Filing history page 1 of 3.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 8,333 | $2.80 | $23K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 8,333 | $118.00 | $983K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,667 | $118.00 | $315K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 8,333 | $2.80 | $23K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 2,000 | $8.65 | $17K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 2,000 | $8.65 | $17K | |
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 3,183 | $2.80 | $9K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 3,083 | $98.32 footnote F2 | $303K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 100 | $99.00 | $10K | |
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 5,150 | $2.80 | $14K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 900 | $98.43 footnote F3 | $89K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,861 | $99.84 footnote F4 | $186K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,276 | $100.60 footnote F5 | $128K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 980 | $101.79 footnote F6 | $100K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 133 | $102.78 footnote F7 | $14K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,667 | $98.00 | $261K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 3,183 | $2.80 | $9K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 5,150 | $2.80 | $14K | |
| ||||||
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 16,667 | $2.80 | $47K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,961 | $91.57 footnote F2 | $180K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,553 | $93.05 footnote F3 | $238K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 6,763 | $93.65 footnote F4 | $633K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 3,869 | $94.61 footnote F5 | $366K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,521 | $96.39 footnote F6 | $147K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,667 | $97.61 | $260K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 16,667 | $2.80 | $47K | |
| ||||||
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 8,000 | $8.65 | $69K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 8,000 | $8.65 | $69K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $105.15 | $149K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $105.15 | $149K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 866 | $105.90 footnote F2 | $92K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 1,909 | $107.20 footnote F3 | $205K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 4,284 | $108.39 footnote F4 | $464K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 2,921 | $109.00 footnote F5 | $318K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 20 | $110.08 | $2K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 555 | $105.56 footnote F6 | $59K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 400 | $106.10 footnote F7 | $42K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 2,200 | $107.47 footnote F8 | $236K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 4,916 | $108.53 footnote F9 | $534K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 1,829 | $109.14 footnote F10 | $200K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 100 | $110.09 | $11K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| ||||||
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 8,333 | $2.80 | $23K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 8,333 | $120.64 | $1.01M | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,666 | $120.64 | $322K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 8,333 | $2.80 | $23K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 3,333 | $2.80 | $9K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 3,333 | $125.00 | $417K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 3,333 | $2.80 | $9K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,416 | $120.00 | $170K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,416 | $106.61 | $151K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 19,384 | $8.65 | $168K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 6,968 | $11.55 | $80K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 2,920 | $17.12 | $50K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 5,840 | $30.78 | $180K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 19,384 | $110.36 footnote F2 | $2.14M | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 6,968 | $110.30 footnote F3 | $769K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 2,920 | $110.31 footnote F3 | $322K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 5,840 | $110.29 footnote F2 | $644K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 19,384 | $8.65 | $168K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 6,968 | $11.55 | $80K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 2,920 | $17.12 | $50K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 5,840 | $30.78 | $180K | |
| ||||||
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 16,666 | $2.80 | $47K | |
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 8,333 | $2.80 | $23K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 4,465 | $98.63 footnote F2 | $440K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,456 | $99.57 footnote F3 | $245K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,531 | $100.58 footnote F4 | $255K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 7,214 | $101.44 footnote F5 | $732K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,680 | $98.64 footnote F6 | $166K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,500 | $99.57 footnote F7 | $149K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,010 | $100.78 footnote F8 | $203K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 3,143 | $101.49 footnote F9 | $319K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,666 | $98.00 | $261K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,666 | $98.00 | $261K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 16,666 | $2.80 | $47K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 8,333 | $2.80 | $23K | |
| ||||||
| Shan Riku Sakakibara - Officer | Gift | Class A Common Stock | 3,500 | $0.00 | - | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,416 | $97.54 | $138K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 10,000 | $97.54 | $975K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 10,000 | $100.00 | $1.00M | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 11,042 | $8.65 | $96K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 3,969 | $11.55 | $46K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 1,663 | $17.12 | $28K | |
| Thomas P. Lynch - Officer | Option exercise | Class A Common Stock | 3,326 | $30.78 | $102K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 38 | $96.47 | $4K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 1,944 | $98.97 footnote F2 | $192K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 8,285 | $100.12 footnote F3 | $830K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 775 | $100.83 footnote F4 | $78K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 614 | $99.00 footnote F5 | $61K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 2,997 | $100.11 footnote F3 | $300K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 358 | $100.82 footnote F6 | $36K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 385 | $99.22 footnote F7 | $38K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 1,131 | $100.33 footnote F8 | $113K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 147 | $101.41 footnote F9 | $15K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 576 | $98.89 footnote F2 | $57K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 2,518 | $100.20 footnote F10 | $252K | |
| Thomas P. Lynch - Officer | Open-market sale | Class A Common Stock | 232 | $100.92 footnote F11 | $23K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 11,042 | $8.65 | $96K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 3,969 | $11.55 | $46K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 1,663 | $17.12 | $28K | |
| Thomas P. Lynch - Officer | Option exercise | Stock Option (right to buy) | 3,326 | $30.78 | $102K | |
| ||||||
| Oguzhan Atay - Officer | Other | Class A Common Stock | 20,000 | $0.00 footnote F1 | - | |
| Oguzhan Atay - Officer | Gift | Class A Common Stock | 20,000 | $0.00 | - | |
| Oguzhan Atay - Officer | Other | Class B Common Stock | 20,000 | $0.00 footnote F1 | - | |
| ||||||
| David Tsao - Officer | Other | Class A Common Stock | 20,000 | $0.00 footnote F1 | - | |
| David Tsao - Officer | Gift | Class A Common Stock | 20,000 | $0.00 | - | |
| David Tsao - Officer | Other | Class B Common Stock | 20,000 | $0.00 footnote F1 | - | |
| ||||||
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 129,780 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 7,980 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 7,980 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 24,222 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 2,405 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 2,405 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 271,028 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 38,106 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 38,106 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 10,921 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 719 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 719 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 5,761 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 1,666 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 15,244 | $0.00 | - | |
| Krishna Kittu Kolluri - Director | Other | Class A Common Stock | 5,644 | $0.00 | - | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 10,000 | $100.00 | $1.00M | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $100.00 | $142K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $92.86 | $132K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 10,000 | $92.86 | $929K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 15,539 | $2.80 | $44K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 15,539 | $150.03 footnote F2 | $2.33M | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 15,539 | $2.80 | $44K | |
| ||||||
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 20,000 | $2.80 | $56K | |
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 6,250 | $2.80 | $18K | |
| Oguzhan Atay - Officer | Option exercise | Class A Common Stock | 6,250 | $2.80 | $18K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 269 | $133.01 footnote F2 | $36K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 555 | $133.81 footnote F3 | $74K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 135 | $135.42 footnote F4 | $18K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 6,354 | $136.42 footnote F5 | $867K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 9,989 | $137.25 footnote F6 | $1.37M | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 2,431 | $138.09 footnote F7 | $336K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 267 | $139.21 footnote F8 | $37K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 84 | $133.00 footnote F2 | $11K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 173 | $133.81 footnote F3 | $23K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 44 | $135.41 footnote F4 | $6K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,981 | $136.42 footnote F5 | $270K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 3,124 | $137.25 footnote F6 | $429K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 762 | $138.09 footnote F7 | $105K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 82 | $139.21 footnote F8 | $11K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 84 | $133.01 footnote F2 | $11K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 173 | $133.81 footnote F3 | $23K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 43 | $135.41 footnote F4 | $6K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 1,983 | $136.42 footnote F5 | $271K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 3,125 | $137.25 footnote F6 | $429K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 760 | $138.09 footnote F7 | $105K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 82 | $139.20 footnote F8 | $11K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 6,250 | $137.37 | $859K | |
| Oguzhan Atay - Officer | Open-market sale | Class A Common Stock | 6,250 | $137.37 | $859K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 20,000 | $2.80 | $56K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 6,250 | $2.80 | $18K | |
| Oguzhan Atay - Officer | Option exercise | Stock Option (right to buy) | 6,250 | $2.80 | $18K | |
| ||||||
| Shan Riku Sakakibara - Officer | Open-market sale | Class A Common Stock | 4,000 | $140.21 | $561K | |
| Nancy Joann Johnson - Officer | Open-market sale | Class A Common Stock | 2,133 | $126.98 footnote F2 | $271K | |
| Nancy Joann Johnson - Officer | Open-market sale | Class A Common Stock | 5,559 | $127.89 footnote F3 | $711K | |
| Nancy Joann Johnson - Officer | Open-market sale | Class A Common Stock | 5,601 | $128.96 footnote F4 | $722K | |
| Nancy Joann Johnson - Officer | Open-market sale | Class A Common Stock | 906 | $129.78 footnote F5 | $118K | |
| ||||||
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $125.46 | $178K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $125.46 | $178K | |
| Bosch John Roderick Ten - Officer | Open-market sale | Class A Common Stock | 1,417 | $125.46 | $178K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Option exercise | Class A Common Stock | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 1,102 | $122.90 footnote F2 | $135K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 2,477 | $123.84 footnote F3 | $307K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 2,415 | $124.90 footnote F4 | $302K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 3,185 | $125.85 footnote F5 | $401K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 821 | $126.89 footnote F6 | $104K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 1,138 | $122.84 footnote F7 | $140K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 2,274 | $123.71 footnote F8 | $281K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 1,725 | $124.65 footnote F9 | $215K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 3,835 | $125.76 footnote F10 | $482K | |
| David Tsao - Officer | Open-market sale | Class A Common Stock | 1,028 | $126.90 footnote F11 | $130K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| David Tsao - Officer | Option exercise | Stock Option (right to buy) | 10,000 | $2.80 | $28K | |
| ||||||
Item 2.02, 9.01
Item 1.01, 2.03, 9.01
Item 1.01, 2.03, 9.01
Item 2.02, 9.01
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
Related companies with recent insider activity
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
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