Who owns BillionToOne, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of BLLN from SEC Form 13F filings across 154 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 154 institutions disclosed 15.3M shares of BillionToOne, Inc. worth $1.82B — about 32.9% of shares outstanding; the largest disclosed holder is ADAMS STREET PARTNERS LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
154
13F holders
$1.82B
value, 2026 filers
32.9%
of shares outstanding (15.3M sh)
76
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of BLLN's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | ADAMS STREET PARTNERS LLC | 1.7M | $205.3M | 46.4% | 3.7% | 0.0% |
| 2 | PRICE T ROWE ASSOCIATES INC /MD/ | 1.0M | $121.2M | 0.0% | 2.2% | +37.0% |
| 3 | BAILLIE GIFFORD & CO | 901,420 | $108.2M | 0.1% | 1.9% | -28.5% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 840,970 | $100.9M | 0.0% | 1.8% | +456.1% |
| 5 | Invesco Ltd. | 835,614 | $100.3M | 0.0% | 1.8% | +105.6% |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | 799,468 | $95.9M | 0.0% | 1.7% | +338.2% |
| 7 | NEUBERGER BERMAN GROUP LLC | 764,215 | $91.7M | 0.1% | 1.6% | +7.8% |
| 8 | BAMCO INC /NY/ | 742,093 | $89.0M | 0.1% | 1.6% | +0.1% |
| 9 | WASATCH ADVISORS LP | 518,084 | $62.2M | 0.4% | 1.1% | +40.2% |
| 10 | MILLENNIUM MANAGEMENT LLCNEW | 425,032 | $51.0M | 0.0% | 0.9% | new |
| 11 | FULLER & THALER ASSET MANAGEMENT, INC.NEW | 418,565 | $50.2M | 0.1% | 0.9% | new |
| 12 | EMERALD ADVISERS, LLC | 375,858 | $45.1M | 1.1% | 0.8% | +56.9% |
| 13 | NEXT CENTURY GROWTH INVESTORS LLC | 364,467 | $43.7M | 2.3% | 0.8% | +302.4% |
| 14 | UBS Group AG | 344,287 | $41.3M | 0.0% | 0.7% | +183.1% |
| 15 | JPMORGAN CHASE & CO | 340,371 | $41.0M | 0.0% | 0.7% | +20.2% |
| 16 | AMERIPRISE FINANCIAL INC | 320,612 | $38.5M | 0.0% | 0.7% | +45.7% |
| 17 | OBERWEIS ASSET MANAGEMENT INC/NEW | 299,030 | $35.9M | 0.7% | 0.6% | new |
| 18 | WELLS FARGO & COMPANY/MN | 271,554 | $32.6M | 0.0% | 0.6% | +24408.5% |
| 19 | ALLIANCEBERNSTEIN L.P. | 262,103 | $20.7M | 0.0% | 0.6% | +17.4% |
| 20 | Napean Trading & Investment Co (Singapore) PTE Ltd | 233,333 | $28.0M | 9.6% | 0.5% | 0.0% |
| 21 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 223,933 | $26.9M | 0.0% | 0.5% | -6.9% |
| 22 | EMERALD MUTUAL FUND ADVISERS TRUST | 203,990 | $24.5M | 0.9% | 0.4% | +54.3% |
| 23 | Penn Capital Management Company, LLC | 129,602 | $15.5M | 1.0% | 0.3% | +2.6% |
| 24 | BNP PARIBAS FINANCIAL MARKETS | 122,527 | $14.7M | 0.0% | 0.3% | +1531487.5% |
| 25 | GOLDMAN SACHS GROUP INC | 120,325 | $14.4M | 0.0% | 0.3% | +2793.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.