BLLN
BillionToOne, Inc.
105.30$
-4.9%
vs. previous close
Closing price · As of: Nov 13, 2026
Ownership
Ownership Structure
Who owns BillionToOne, Inc. (BLLN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 84.8% of the shares are freely tradable; institutional investors hold 35.6%.
Institutional ownership
?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
35.6%
Insiders
?Share of the stock held by the executives, founders and major shareholders of the company itself.
37.1%
Float
?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
84.8%
Short % of float
?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
11.2%
Shares Outstanding
?Total number of shares issued. Price times share count gives market cap.
43Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Adams Street Partners LLC | 3.63 | 1,711,430 | +0.0 | 06/30/2026 |
| T. Rowe Price Associates, Inc. | 2.14 | 1,010,322 | +37.0 | 06/30/2026 |
| Baillie Gifford & Co Limited. | 1.91 | 901,420 | -28.5 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 1.78 | 840,970 | +456.1 | 06/30/2026 |
| Amvescap Plc. | 1.77 | 835,614 | +105.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 1.69 | 799,468 | +338.2 | 06/30/2026 |
| Neuberger Berman Group LLC | 1.62 | 764,215 | +7.8 | 06/30/2026 |
| BAMCO Inc | 1.57 | 742,093 | +0.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 1.59 | 728,022 | +0.3 | 09/30/2026 |
| Invesco Discovery A | 1.28 | 584,709 | +10.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Sakakibara Shan Riku | Chief Product Officer | 196,500 | 20,691,450 $ | Sep 10, 2026 | direct |
| Atay Oguzhan | Chairman and CEO | 141,167 | 14,864,885 $ | Nov 2, 2026 | both |
| Kolluri Krishna Kittu | Director | 94,860 | 9,988,758 $ | Nov 9, 2026 | indirect |
| Ileri Firat | Director | 39,895 | 4,200,944 $ | Nov 6, 2026 | direct |
| ten Bosch John Roderick | SVP of Laboratory Operations | 16,551 | 1,742,820 $ | Nov 2, 2026 | direct |
| Lynch Thomas P. | See Remarks | 10,700 | 1,126,710 $ | Oct 13, 2026 | direct |
| Tsao David | Chief Technology Officer | 1,000 | 105,300 $ | Nov 2, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 5,643 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 23,316 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 2,302 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 5,760 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 719 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 10,921 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 58,290 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 271,028 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 3,704 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 24,222 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 7,980 | 0.00 | – |
| Nov 9, 2026 | Kolluri Krishna Kittu | Director | Other | 129,780 | 0.00 | – |
| Nov 6, 2026 | Ileri Firat | Director | Other | 436 | 113.94 | 49,678 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,667 | 113.17 | 301,824 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 200 | 112.39 | 22,478 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 411 | 111.03 | 45,632 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,223 | 110.35 | 245,310 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,451 | 109.11 | 267,440 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,075 | 108.43 | 224,990 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 974 | 107.34 | 104,548 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 536 | 112.44 | 60,269 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,117 | 110.98 | 123,963 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 3,803 | 110.29 | 419,433 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 5,720 | 109.08 | 623,932 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 4,009 | 108.25 | 433,960 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,482 | 107.31 | 159,040 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Other | 8,334 | 2.80 | 23,335 |
| Nov 2, 2026 | Atay Oguzhan | Chairman and CEO | Other | 16,667 | 2.80 | 46,668 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 23 | 113.17 | 2,603 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 208 | 112.01 | 23,299 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 633 | 111.14 | 70,350 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 2,389 | 110.31 | 263,520 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 3,234 | 109.15 | 353,000 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 2,450 | 108.39 | 265,544 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 1,063 | 107.33 | 114,094 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 100 | 113.17 | 11,317 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 300 | 112.19 | 33,657 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 1,130 | 110.77 | 125,171 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 1,992 | 110.13 | 219,377 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 3,241 | 109.04 | 353,412 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 2,320 | 108.24 | 251,106 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Sell | 917 | 107.31 | 98,406 |
| Nov 2, 2026 | Tsao David | Chief Technology Officer | Other | 10,000 | 2.80 | 28,000 |
| Nov 2, 2026 | ten Bosch John Roderick | SVP of Laboratory Operations | Sell | 1,417 | 113.17 | 160,362 |
| Oct 28, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 2,667 | 118.00 | 314,706 |
| Oct 28, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 8,333 | 118.00 | 983,294 |
| Oct 28, 2026 | Atay Oguzhan | Chairman and CEO | Other | 8,333 | 2.80 | 23,332 |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 133 | 102.78 | 13,669 |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 980 | 101.79 | 99,751 |
| Oct 15, 2026 | Atay Oguzhan | Chairman and CEO | Sell | 1,276 | 100.60 | 128,369 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 13, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.