BLLN Institutional Ownership
Who owns BillionToOne, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 156 funds reported holding BLLN at Jun 30, 2026.
- ▲126 buying vs 24 selling
- ▲Shares held by funds +34.7%
- ▲Funds holding +66
- ▲Superinvestors: 3 added, 1 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
3 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 156 | 90 | +73.3% |
| In funds' top 10 | 7 | 5 | +40.0% |
| 13F shares | 15.3M | 11.3M | +34.7% |
| Held by funds | – | – | – |
| New positions | 77 | 25 | +208.0% |
| Increased | 49 | 32 | +53.1% |
| Reduced | 13 | 14 | −7.1% |
| Sold out | 11 | 28 | −60.7% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in BLLN
All superinvestors →
Who owns BLLN
share of fund held shares- Index and passive funds18.3%
- Active managers and hedge funds67.0%
- Banks and brokers12.8%
- Pensions, insurers and other1.9%
The top 10 holders own 56.0% of all BLLN shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
31 funds changed their position- Regents of the University of CaliforniaSold out−41K sh
- OpenArc Corporate Advisory, LLCSold out−24K sh
- Sierra Summit Advisors LLCSold out−12K sh
- Creative PlanningNew+11K sh
- Wasatch Advisors LPTrimmed−11K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Adams Street Partners LLC | – | 1.7M | $205M | 0 |
| 2 | Price T Rowe Associates Inc /md/ | – | 1M | $121M | +273K |
| 3 | Baillie Gifford & Co | – | 901K | $108M | −359K |
| 4 | Vanguard Portfolio Management LLC | – | 841K | $101M | +690K |
| 5 | Invesco Ltd. | – | 836K | $100M | +429K |
| 6 | Vanguard Capital Management LLC | – | 799K | $95.9M | +617K |
| 7 | Neuberger Berman Group LLC | – | 764K | $91.7M | +55K |
| 8 | Bamco Inc /ny/ | – | 742K | $89M | +608 |
| 9 | Wasatch Advisors LP | – | 518K | $62.2M | +148K |
| 10 | Millennium Management LLC | – | 425K | $51M | +425K |
- Vanguard Portfolio Management LLC+690K sh+$82.8M
- Vanguard Capital Management LLC+617K sh+$74M
- Invesco Ltd.+429K sh+$51.5M
- Millennium Management LLC+425K sh+$51M
- Fuller & Thaler Asset Management, Inc.+419K sh+$50.2M
- Oberweis Asset Management Inc/+299K sh+$35.9M
- Next Century Growth Investors LLC+274K sh+$32.9M
- Price T Rowe Associates Inc /md/+273K sh+$32.7M
- Civilization Ventures Management, LLC−1.1M sh−$108M
- Baillie Gifford & Co−359K sh−$43M
- Nvp Associates, LLC−513K sh−$40.5M
- Capital International Investors−178K sh−$14.1M
- Massachusetts Financial Services Co /ma/−81K sh−$9.7M
- PFM Health Sciences, LP−88K sh−$7M
- Two Sigma Investments, LP−53K sh−$6.3M
- Deep Track Capital, LP−50K sh−$3.9M
BLLN institutional ownership FAQ
Who owns the most BLLN stock?
In Q2 2026 13F filings the largest holder of BLLN was Adams Street Partners LLC, followed by Price T Rowe Associates Inc /md/ and Baillie Gifford & Co. Index fund managers are usually the biggest holders of large companies.
What percentage of BLLN is owned by institutions?
156 funds reported holding 15.3M BLLN shares at Jun 30, 2026.
Are hedge funds buying BLLN?
In Q2 2026, 126 funds bought BLLN (77 of them new positions) and 24 sold (11 sold out completely). Among well known investors, 3 added and 1 cut. Our fund sentiment for BLLN is strongly bullish.
What is BLLN's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this BLLN ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.