BLLN
BillionToOne, Inc.
NASDAQ · Healthcare · Medical - Diagnostics & Research · US
$103.78
+2.72%0
Insider buys (3m)
35
Insider sells (3m)
-$11.2M
Net value (3m)
-19.4%
Price return (3m)
Form 4 filings
| Date | Insider | Activity | Shares | Price |
|---|---|---|---|---|
| Oct 19, 2026 | Lynch Thomas P. · officer: See Remarks | M-Exempt | 2,000 | $8.65 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 900 | $98 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | M-Exempt | 5,150 | $2.80 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 100 | $99 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 3,083 | $98 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | M-Exempt | 3,183 | $2.80 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 1,861 | $100 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 2,667 | $98 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 133 | $103 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 980 | $102 |
| Oct 16, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 1,276 | $101 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 1,961 | $92 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 6,763 | $94 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 2,667 | $98 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 1,521 | $96 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 3,869 | $95 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | Sale | 2,553 | $93 |
| Oct 14, 2026 | Atay Oguzhan · director, officer: Chairman and CEO | M-Exempt | 16,667 | $2.80 |
| Oct 13, 2026 | Lynch Thomas P. · officer: See Remarks | M-Exempt | 8,000 | $8.65 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 400 | $106 |
| Oct 7, 2026 | ten Bosch John Roderick · officer: SVP of Laboratory Operations | Sale | 1,417 | $105 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | M-Exempt | 10,000 | $2.80 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 866 | $106 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 1,909 | $107 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 4,284 | $108 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 2,921 | $109 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 20 | $110 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 555 | $106 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 2,200 | $107 |
| Oct 7, 2026 | Tsao David · director, officer: Chief Technology Officer | Sale | 4,916 | $109 |
Institutional positioning
13F filings over the trailing two quarters
New 106Increased 82Reduced 28Sold out 20
| Filer | Action | Shares | Filed |
|---|---|---|---|
| ADAMS STREET PARTNERS LLC | Unchanged | 1,711,430 | May 15, 2026 |
| ADAMS STREET PARTNERS LLC | Unchanged | 1,711,430 | Aug 14, 2026 |
| BAILLIE GIFFORD & CO | Reduced | 1,259,993 | May 8, 2026 |
| Civilization Ventures Management, LLC | Unchanged | 1,099,431 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1,010,322 | Aug 14, 2026 |
| BAILLIE GIFFORD & CO | Reduced | 901,420 | Aug 6, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 840,970 | Aug 13, 2026 |
| Invesco Ltd. | Increased | 835,614 | Aug 14, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 799,468 | Aug 13, 2026 |
| Neuberger Berman Group LLC | Increased | 764,215 | Aug 13, 2026 |
| BAMCO INC /NY/ | Increased | 742,093 | Aug 14, 2026 |
| BAMCO INC /NY/ | Increased | 741,485 | May 15, 2026 |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 737,518 | May 15, 2026 |
| NEUBERGER BERMAN GROUP LLC | Increased | 709,214 | May 14, 2026 |
| WASATCH ADVISORS LP | Increased | 518,084 | Jul 10, 2026 |
Insider activity from SEC Form 4; institutional positioning from 13F filings · Latest filing Oct 19, 2026