Security record · archived quarter
BLLN
BillionToOne, Inc. · Healthcare · Medical - Diagnostics & Research
45Tracked holders
+8Δ holders
6.22MShares held
$470.80MReported value
+13New positions
−6Exits
Momentum inputs (comparable managers):
holder breadth +21.6% ·
share flow +29.0% ·
net new positions +15.6%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 62 | +17 | 8.87M | $1.05B | +21 | −4 |
| Q1 2026 | 45 | +8 | 6.22M | $470.80M | +13 | −6 |
| Q4 2025 | 38 | +14 | 5.00M | $409.17M | +15 | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Baillie Gifford ✦ | 1.26M | -0.6% | $99.46M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 2 | Baillie Gifford ✦ | 1.26M | -0.6% | $99.46M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 3 | Baillie Gifford ✦ | 1.26M | -0.6% | $99.46M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 4 | Baillie Gifford ✦ | 1.26M | -0.6% | $99.46M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 5 | Baillie Gifford ✦ | 1.26M | -0.6% | $99.46M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 6 | Bamco Inc /Ny/ | 741.49K | +336.2% | $58.53M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 7 | T. Rowe Price ✦ | 737.52K | +52.0% | $58.22M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | T. Rowe Price ✦ | 737.52K | +52.0% | $58.22M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | Neuberger Berman Group LLC | 709.21K | +1.2% | $37.81M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | Neuberger Berman Group LLC | 709.21K | +1.2% | $37.81M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | Invesco Ltd. | 406.51K | +114.2% | $32.09M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 12 | JPMorgan Chase ✦ | 283.14K | -27.8% | $19.85M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 13 | JPMorgan Chase ✦ | 283.14K | -27.8% | $19.85M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 14 | JPMorgan Chase ✦ | 283.14K | -27.8% | $19.85M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 15 | UBS AM, a distinct business unit of… | 240.59K | +5.7% | $18.99M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | UBS AM, a distinct business unit of… | 240.59K | +5.7% | $18.99M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | UBS AM, a distinct business unit of… | 240.59K | +5.7% | $18.99M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Alliancebernstein L.P. | 223.25K | +7.0% | $18.27M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | Ameriprise Financial Inc | 220.03K | +80.0% | $17.37M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | Ameriprise Financial Inc | 220.03K | +80.0% | $17.37M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | Vanguard Capital Management Llc | 182.46K | — | $14.40M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | Capital International Investors | 178.00K | 0.0% | $14.05M | 0.0% | Held | 2 | SEC ↗ |
| 23 | Massachusetts Financial Services Co… | 159.57K | -2.3% | $12.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | Massachusetts Financial Services Co… | 159.57K | -2.3% | $12.60M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 25 | UBS Group AG | 121.60K | +284.8% | $9.60M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 26 | UBS Group AG | 121.60K | +284.8% | $9.60M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | UBS Group AG | 121.60K | +284.8% | $9.60M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 28 | UBS Group AG | 121.60K | +284.8% | $9.60M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 29 | BlackRock ✦ (passive) | 95.16K | +33.3% | $7.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 30 | BlackRock ✦ (passive) | 95.16K | +33.3% | $7.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | BlackRock ✦ (passive) | 95.16K | +33.3% | $7.51M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 32 | Geode Capital Management ✦ (passive) | 89.11K | +8.6% | $7.04M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 33 | Geode Capital Management ✦ (passive) | 89.11K | +8.6% | $7.04M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | New York State Common Retirement… | 88.68K | +1633.1% | $7.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Two Sigma Investments ✦ | 82.78K | New | $6.53M | 0.0% | New | 1 | SEC ↗ |
| 36 | Ensign Peak Advisors, Inc | 51.50K | New | $4.07M | 0.0% | New | 1 | SEC ↗ |
| 37 | Renaissance Technologies ✦ | 51.25K | New | $4.05M | 0.0% | New | 1 | SEC ↗ |
| 38 | Td Asset Management Inc | 43.11K | +61.3% | $3.40M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 39 | Manufacturers Life Insurance… | 30.51K | +151.8% | $2.41M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Charles Schwab Investment… | 28.05K | +5.5% | $2.21M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 41 | Squarepoint Ops LLC | 22.95K | +190.8% | $1.81M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 42 | Universal- Beteiligungs- und… | 20.59K | +25.0% | $1.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 43 | State Street Global Advisors ✦ (passive) | 19.70K | -8.8% | $1.56M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | Russell Investments Group, Ltd. | 18.66K | New | $1.47M | 0.0% | New | 1 | SEC ↗ |
| 45 | Russell Investments Group, Ltd. | 18.66K | New | $1.47M | 0.0% | New | 1 | SEC ↗ |
| 46 | Russell Investments Group, Ltd. | 18.66K | New | $1.47M | 0.0% | New | 1 | SEC ↗ |
| 47 | Russell Investments Group, Ltd. | 18.66K | New | $1.47M | 0.0% | New | 1 | SEC ↗ |
| 48 | Russell Investments Group, Ltd. | 18.66K | New | $1.47M | 0.0% | New | 1 | SEC ↗ |
| 49 | Soros Fund Management ✦ | 14.50K | 0.0% | $1.14M | 0.0% | Held | 2 | SEC ↗ |
| 50 | Deutsche Bank Ag\ | 13.64K | New | $1.08M | 0.0% | New | 1 | SEC ↗ |
| 51 | Sei Investments Co | 13.40K | New | $1.06M | 0.0% | New | 1 | SEC ↗ |
| 52 | Bank Of America Corp /De/ | 12.71K | +8603.4% | $1.00M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Morgan Stanley ✦ | 12.59K | +249.7% | $993,539 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | Morgan Stanley ✦ | 12.59K | +249.7% | $993,539 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 55 | Morgan Stanley ✦ | 12.59K | +249.7% | $993,539 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 56 | Morgan Stanley ✦ | 12.59K | +249.7% | $993,539 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 57 | Morgan Stanley ✦ | 12.59K | +249.7% | $993,539 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | Susquehanna International Group, Llp | 12.49K | New | $985,645 | 0.0% | New | 1 | SEC ↗ |
| 59 | Nomura Holdings Inc | 8.60K | New | $678,884 | 0.0% | New | 1 | SEC ↗ |
| 60 | Alyeska Investment Group, L.P. | 7.00K | 0.0% | $552,580 | 0.0% | Held | 2 | SEC ↗ |
| 61 | Royal Bank Of Canada | 4.77K | -14.4% | $377,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 62 | Royal Bank Of Canada | 4.77K | -14.4% | $377,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | Goldman Sachs Group ✦ | 4.16K | -79.9% | $328,233 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 64 | D. E. Shaw & Co. ✦ | 3.86K | New | $304,866 | 0.0% | New | 1 | SEC ↗ |
| 65 | Barclays Plc | 2.76K | New | $217,717 | 0.0% | New | 1 | SEC ↗ |
| 66 | Barclays Plc | 2.76K | New | $217,717 | 0.0% | New | 1 | SEC ↗ |
| 67 | Wells Fargo & Company/Mn | 1.11K | +18.8% | $87,466 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Osaic Holdings, Inc. | 420 | +35.5% | $33,154 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 69 | Osaic Holdings, Inc. | 420 | +35.5% | $33,154 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Fifth Third Bancorp | 134 | New | $10,615 | 0.0% | New | 1 | SEC ↗ |
| 71 | Us Bancorp \De\ | 64 | New | $5,052 | 0.0% | New | 1 | SEC ↗ |
| 72 | Jones Financial Companies Lllp | 12 | 0.0% | $835 | 0.0% | Held | 2 | SEC ↗ |
| 73 | Bnp Paribas Financial Markets | 8 | New | $632 | 0.0% | New | 1 | SEC ↗ |
| 74 | Citigroup Inc | 1 | 0.0% | $79 | 0.0% | Held | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Two Sigma Investments | $6.53M | 0.0% |
| Ensign Peak Advisors, Inc | $4.07M | 0.0% |
| Renaissance Technologies | $4.05M | 0.0% |
| Russell Investments Group… | $1.47M | 0.0% |
| Russell Investments Group… | $1.47M | 0.0% |
| Russell Investments Group… | $1.47M | 0.0% |
| Russell Investments Group… | $1.47M | 0.0% |
| Russell Investments Group… | $1.47M | 0.0% |
| Deutsche Bank Ag\ | $1.08M | 0.0% |
| Sei Investments Co | $1.06M | 0.0% |
| Susquehanna International… | $985,645 | 0.0% |
| Nomura Holdings Inc | $678,884 | 0.0% |
Exited
| Citadel Advisors | $12.18M | was 0.0% |
| Marshall Wace | $1.71M | was 0.0% |
| Norges Bank | $818,400 | was 0.0% |
| Millennium Management | $466,979 | was 0.0% |
| Fidelity (FMR) | $57,288 | was 0.0% |
| Legal & General Group Plc | $15,059 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 88 holders, 11.06M shares, $793.58M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 10
Tsao David
Officer, Director · 10.00K sh · $928,600
Aug 10
ten Bosch John Roderick
Officer · 1.42K sh · $131,583
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
Get this via the API