BillionToOne Inc
BLLN
157 hedge funds and large institutions have $1.82B invested in BillionToOne Inc in 2026 Q2 according to their latest regulatory filings, with 77 funds opening new positions, 50 increasing their positions, 13 reducing their positions, and 10 closing their positions.
670% more first-time investments, than exits
New positions opened: 77 | Existing positions closed: 10
285% more repeat investments, than reductions
Existing positions increased: 50 | Existing positions reduced: 13
108% more capital invested
Capital invested by funds: $875M → $1.82B (+$942M)
73% more funds holding
Funds holding: 91 → 157 (+66)
20% more funds holding in top 10
Funds holding in top 10: 5 → 6 (+1)
9.38% more ownership
Funds ownership: 27.43% → 36.81% (+9.4%)
2% more call options, than puts
Call options by funds: $10.6M | Put options by funds: $10.4M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Vanguard Portfolio Management
Malvern,
Pennsylvania
|
+$63M |
| 2 |
Vanguard Capital Management
Malvern,
Pennsylvania
|
+$56.3M |
| 3 |
Invesco
Atlanta,
Georgia
|
+$39.2M |
| 4 |
Millennium Management
New York
|
+$38.8M |
| 5 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$38.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
CVM
Civilization Ventures Management
Belvedere Tiburon,
California
|
-$100M |
| 2 |
NA
NVP Associates
Menlo Park,
California
|
-$40.5M |
| 3 |
Baillie Gifford & Co
Edinburgh,
United Kingdom
|
-$32.7M |
| 4 |
Capital International Investors
Los Angeles,
California
|
-$14.1M |
| 5 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$7.36M |
BLLN Hedge Fund Activity: Q2 2026 in Review
157 of the 8,188 institutional investors tracked by Wall St. Rank reported a position in BillionToOne Inc (BLLN) for Q2 2026, worth a combined $1.82B — up 108% from $875M a quarter earlier.
Buyers outnumbered sellers: 77 funds opened new BLLN positions and 10 closed out — a net gain of 67 holders — while 50 added to existing stakes and 13 trimmed.
The largest buyer was Vanguard Portfolio Management, adding an estimated $63M. The largest seller was Civilization Ventures Management, cutting an estimated $100M.
- 157 institutional investors held BillionToOne Inc (BLLN) as of Q2 2026, up from 91 in Q1 2026.
- Funds reported $1.82B of BillionToOne Inc stock for Q2 2026, up 108% quarter-over-quarter.
- 77 funds opened new BillionToOne Inc positions in Q2 2026 and 10 closed out, a net change of +67 holders.
- The largest BillionToOne Inc buyer in Q2 2026 was Vanguard Portfolio Management, an estimated $63M added.
- The largest BillionToOne Inc seller in Q2 2026 was Civilization Ventures Management, an estimated $100M sold.
Based on aggregated 13F filings for Q2 2026.