Nasdaq · CIK 0002070849
BLLN BillionToOne, Inc.
Insider trading from SEC Form 4. Last filing 5 d ago. Close $98.09 on Oct 9, 2026, +53% from the 52-week low and -35% from the high.
Last 90 days
Net insider value
-$16M
more sold than bought
Buys
0
$0 by 0 insiders
Sells
11
$16M by 4 insiders
Insiders on file
10
with a Form 4 at this company
Price and insider trades, last year
BLLNOct 9, 2026 · close 98.09
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at BillionToOne, Inc., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 29Weak | John Roderick ten Bosch SVP of Laboratory Operations sell | $298k 2,834 shares | -13% | +70% from low-27% from high | |
| 40Moderate | David Tsao Chief Technology Officer sell | $2.2M 20,000 shares | -95% | +70% from low-27% from high | |
| 50Moderate | Oguzhan Atay Chairman and CEO sell | $1.3M 10,999 shares | -132% | +90% from low-19% from high | |
| 21Weak | John Roderick ten Bosch SVP of Laboratory Operations sell | $170k 1,416 shares | -6% | +95% from low-17% from high | |
| 31Weak | David Tsao Chief Technology Officer sell | $417k 3,333 shares | -77% | +95% from low-17% from high | |
| 21Weak | John Roderick ten Bosch SVP of Laboratory Operations sell | $151k 1,416 shares | -6% | +62% from low-31% from high | |
| 40Moderate | Thomas P. Lynch See Remarks sell | $3.9M 35,112 shares | -98% | - | |
| 50Moderate | Oguzhan Atay Chairman and CEO sell | $3.0M 30,331 shares | -121% | - | |
| 21Weak | John Roderick ten Bosch SVP of Laboratory Operations sell | $138k 1,416 shares | -5% | - | |
| 40Moderate | David Tsao Chief Technology Officer sell | $2.0M 20,000 shares | -95% | - | |
| 40Moderate | Thomas P. Lynch See Remarks sell | $2.0M 20,000 shares | -97% | - | |
| 57Moderate | Akshay Rai director buy | $150k 2,500 shares | +23% | 0% from low-8% from high | |
| 62Notable | Nancy JoAnn Johnson See Remarks buy | $414k 6,900 shares | +24% | 0% from low-8% from high | |
| 47Moderate | John Roderick ten Bosch See Remarks buy | $48k 800 shares | +2% | 0% from low-8% from high | |
| 55Moderate | David Tsao Chief Technology Officer buy | $60k 1,000 shares | - | 0% from low-8% from high | |
| 43Moderate | Thomas P. Lynch See Remarks buy | $6,000 100 shares | +17% | 0% from low-8% from high | |
| 71Notable | Thomas S Bremner director buy | $2.5M 41,666 shares | +27% | 0% from low-8% from high |
Transactions
The last 100 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 5, 2026 | John Roderick ten Bosch SVP of Laboratory Operations | SOpen-market sale Class A Common Stock10b5-1 | -1,417 | $105.15 | $149k | 20,802 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | MOption exercise Class A Common Stock10b5-1 | +10,000 | $2.80 | $28k | 11,000 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | MOption exercise Class A Common Stock10b5-1 | +10,000 | $2.80 | $28k | 21,000 | 5 d ago |
| Oct 5, 2026 | John Roderick ten Bosch SVP of Laboratory Operations | SOpen-market sale Class A Common Stock10b5-1 | -1,417 | $105.15 | $149k | 19,385 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -866 | $105.90 | $92k | 20,134 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -1,909 | $107.20 | $205k | 18,225 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -4,284 | $108.39 | $464k | 13,941 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -2,921 | $109.00 | $318k | 11,020 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -20 | $110.08 | $2,202 | 11,000 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -555 | $105.56 | $59k | 10,445 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -400 | $106.10 | $42k | 10,045 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -2,200 | $107.47 | $236k | 7,845 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -4,916 | $108.53 | $534k | 2,929 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -1,829 | $109.14 | $200k | 1,100 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -100 | $110.09 | $11k | 1,000 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | MOption exercise Stock Option (right to buy)derivative10b5-1 | -10,000 | $2.80 | $28k | 546,667 | 5 d ago |
| Oct 5, 2026 | David Tsao Chief Technology Officer | MOption exercise Stock Option (right to buy)derivative10b5-1 | -10,000 | $2.80 | $28k | 536,667 | 5 d ago |
| Sep 28, 2026 | Oguzhan Atay Chairman and CEO | MOption exercise Class A Common Stock10b5-1 | +8,333 | $2.80 | $23k | 8,333 | 12 d ago |
| Sep 28, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -8,333 | $120.64 | $1.0M | 0 | 12 d ago |
| Sep 28, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stockindirect: By spouse10b5-1 | -2,666 | $120.64 | $322k | 154,502 | 12 d ago |
| Sep 28, 2026 | Oguzhan Atay Chairman and CEO | MOption exercise Stock Option (right to buy)derivative10b5-1 | -8,333 | $2.80 | $23k | 493,629 | 12 d ago |
| Sep 24, 2026 | John Roderick ten Bosch SVP of Laboratory Operations | SOpen-market sale Class A Common Stock10b5-1 | -1,416 | $120.00 | $170k | 22,219 | 14 d ago |
| Sep 24, 2026 | David Tsao Chief Technology Officer | MOption exercise Class A Common Stock10b5-1 | +3,333 | $2.80 | $9,332 | 4,333 | 14 d ago |
| Sep 24, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -3,333 | $125.00 | $417k | 1,000 | 14 d ago |
| Sep 24, 2026 | David Tsao Chief Technology Officer | MOption exercise Stock Option (right to buy)derivative10b5-1 | -3,333 | $2.80 | $9,332 | 556,667 | 14 d ago |
| Sep 21, 2026 | John Roderick ten Bosch SVP of Laboratory Operations | SOpen-market sale Class A Common Stock10b5-1 | -1,416 | $106.61 | $151k | 23,635 | 19 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +19,384 | $8.65 | $168k | 20,084 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +6,968 | $11.55 | $80k | 27,052 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +2,920 | $17.12 | $50k | 29,972 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +5,840 | $30.78 | $180k | 35,812 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -19,384 | $110.36 | $2.1M | 16,428 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -6,968 | $110.30 | $769k | 9,460 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -2,920 | $110.31 | $322k | 6,540 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -5,840 | $110.29 | $644k | 700 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -19,384 | $8.65 | $168k | 48,974 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -6,968 | $11.55 | $80k | 4,063 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -2,920 | $17.12 | $50k | 5,417 | 21 d ago |
| Sep 17, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -5,840 | $30.78 | $180k | 30,834 | 21 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | MOption exercise Class A Common Stock10b5-1 | +16,666 | $2.80 | $47k | 16,666 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | MOption exercise Class A Common Stock10b5-1 | +8,333 | $2.80 | $23k | 24,999 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -4,465 | $98.63 | $440k | 20,534 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -2,456 | $99.57 | $245k | 18,078 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -2,531 | $100.58 | $255k | 15,547 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -7,214 | $101.44 | $732k | 8,333 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -1,680 | $98.64 | $166k | 6,653 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -1,500 | $99.57 | $149k | 5,153 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -2,010 | $100.78 | $203k | 3,143 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stock10b5-1 | -3,143 | $101.49 | $319k | 0 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stockindirect: By spouse10b5-1 | -2,666 | $98.00 | $261k | 159,834 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | SOpen-market sale Class A Common Stockindirect: By spouse10b5-1 | -2,666 | $98.00 | $261k | 157,168 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | MOption exercise Stock Option (right to buy)derivative10b5-1 | -16,666 | $2.80 | $47k | 510,295 | 26 d ago |
| Sep 14, 2026 | Oguzhan Atay Chairman and CEO | MOption exercise Stock Option (right to buy)derivative10b5-1 | -8,333 | $2.80 | $23k | 501,962 | 26 d ago |
| Sep 10, 2026 | Shan Riku Sakakibara Chief Product Officer | GGift Class A Common Stock | -3,500 | $0.00 | $0 | 196,500 | 28 d ago |
| Sep 9, 2026 | John Roderick ten Bosch SVP of Laboratory Operations | SOpen-market sale Class A Common Stock10b5-1 | -1,416 | $97.54 | $138k | 25,051 | 31 d ago |
| Sep 9, 2026 | David Tsao Chief Technology Officer | MOption exercise Class A Common Stock10b5-1 | +10,000 | $2.80 | $28k | 11,000 | 31 d ago |
| Sep 9, 2026 | David Tsao Chief Technology Officer | MOption exercise Class A Common Stock10b5-1 | +10,000 | $2.80 | $28k | 21,000 | 31 d ago |
| Sep 9, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -10,000 | $97.54 | $975k | 11,000 | 31 d ago |
| Sep 9, 2026 | David Tsao Chief Technology Officer | SOpen-market sale Class A Common Stock10b5-1 | -10,000 | $100.00 | $1.0M | 1,000 | 31 d ago |
| Sep 9, 2026 | David Tsao Chief Technology Officer | MOption exercise Stock Option (right to buy)derivative10b5-1 | -10,000 | $2.80 | $28k | 570,000 | 31 d ago |
| Sep 9, 2026 | David Tsao Chief Technology Officer | MOption exercise Stock Option (right to buy)derivative10b5-1 | -10,000 | $2.80 | $28k | 560,000 | 31 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +11,042 | $8.65 | $96k | 11,742 | 32 d ago |
| Sep 8, 2026 | Oguzhan Atay Chairman and CEO | CConversion Class A Common Stock | +20,000 | $0.00 | $0 | 20,000 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +3,969 | $11.55 | $46k | 15,711 | 32 d ago |
| Sep 9, 2026 | Oguzhan Atay Chairman and CEO | GGift Class A Common Stock | -20,000 | $0.00 | $0 | 0 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +1,663 | $17.12 | $28k | 17,374 | 32 d ago |
| Sep 8, 2026 | Oguzhan Atay Chairman and CEO | CConversion Class B Common Stockderivative | -20,000 | $0.00 | $0 | 2,197,542 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Class A Common Stock10b5-1 | +3,326 | $30.78 | $102k | 20,700 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -38 | $96.47 | $3,666 | 20,662 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -1,944 | $98.97 | $192k | 18,718 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -8,285 | $100.12 | $830k | 10,433 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -775 | $100.83 | $78k | 9,658 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -614 | $99.00 | $61k | 9,044 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -2,997 | $100.11 | $300k | 6,047 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -358 | $100.82 | $36k | 5,689 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -385 | $99.22 | $38k | 5,304 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -1,131 | $100.33 | $113k | 4,173 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -147 | $101.41 | $15k | 4,026 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -576 | $98.89 | $57k | 3,450 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -2,518 | $100.20 | $252k | 932 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | SOpen-market sale Class A Common Stock10b5-1 | -232 | $100.92 | $23k | 700 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -11,042 | $8.65 | $96k | 68,358 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -3,969 | $11.55 | $46k | 11,031 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -1,663 | $17.12 | $28k | 8,337 | 32 d ago |
| Sep 8, 2026 | Thomas P. Lynch See Remarks | MOption exercise Stock Option (right to buy)derivative10b5-1 | -3,326 | $30.78 | $102k | 36,674 | 32 d ago |
| Sep 3, 2026 | David Tsao Chief Technology Officer | CConversion Class A Common Stock | +20,000 | $0.00 | $0 | 21,000 | 34 d ago |
| Sep 8, 2026 | David Tsao Chief Technology Officer | GGift Class A Common Stock | -20,000 | $0.00 | $0 | 1,000 | 34 d ago |
| Sep 3, 2026 | David Tsao Chief Technology Officer | CConversion Class B Common Stockderivative | -20,000 | $0.00 | $0 | 2,305,108 | 34 d ago |
| Nov 7, 2025 | Ross Taylor Chief Financial Officer | JOther Stock Option (right to buy)derivative | -175,000 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | John Roderick ten Bosch See Remarks | JOther Common Stock | -37,000 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | John Lister Chief Administrative Officer | JOther Stock Option (right to buy)derivative | -133,300 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | Nancy JoAnn Johnson See Remarks | JOther Common Stock | -29,000 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | Oguzhan Atay See Remarks | CConversion Common Stock | +262,434 | - | - | 262,434 | Nov 12, 2025 |
| Nov 7, 2025 | Thomas P. Lynch See Remarks | JOther Common Stock | -600 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | David Tsao Chief Technology Officer | JOther Common Stock | -2,325,108 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | Shan Riku Sakakibara Chief Product Officer | JOther Common Stock | -220,000 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | Akshay Rai director | POpen-market purchase Class A Common Stock | +2,500 | $60.00 | $150k | 13,509 | Nov 12, 2025 |
| Nov 7, 2025 | Oguzhan Atay See Remarks | JOther Common Stock | -262,434 | - | - | 0 | Nov 12, 2025 |
| Nov 7, 2025 | Shan Riku Sakakibara Chief Product Officer | JOther Class A Common Stock | +220,000 | - | - | 220,000 | Nov 12, 2025 |
| Nov 7, 2025 | Ross Taylor Chief Financial Officer | JOther Stock Option (right to buy)derivative | +175,000 | - | - | 175,000 | Nov 12, 2025 |
| Nov 7, 2025 | John Roderick ten Bosch See Remarks | JOther Class A Common Stock | +37,000 | - | - | 37,000 | Nov 12, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Oguzhan AtaySee Remarks
- Thomas S Bremnerdirector
- Nancy JoAnn JohnsonSee Remarks
- John ListerChief Administrative Officer
- Thomas P. LynchSee Remarks
- Akshay Raidirector
- Shan Riku SakakibaraChief Product Officer
- Ross TaylorChief Financial Officer
- David TsaoChief Technology Officer
- John Roderick ten BoschSee Remarks
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.