BillionToOne, Inc. 13F holders
155 funds reported a position in BillionToOne, Inc. in their 13F for the quarter ended 30 June 2026, together 15.3 million shares worth $1.82 billion. Against the quarter before, 76 opened a position, 49 added, 13 trimmed and 11 sold out; together they bought a net 3.9 million shares. The largest holders: Adams Street Partners LLC, Price T Rowe Associates Inc. and Baillie Gifford & Co.
Funds holding155+65 on Q1 2026
Shares they held15.3Mworth $1.82 billion
Net bought on the quarter3.9M sharesabout $469.9 million at the funds' values
Funds buying to selling125 to 24opened or added, to cut or sold
Opened 76Added 49Held 17Trimmed 13Sold out 11
What each fund did in BLLN against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in BLLN in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,405 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 26 reported a position in BillionToOne, Inc.: 10 opened one, 10 added, 3 trimmed and 6 sold out, a net 70,728 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 7 reported a position in BillionToOne, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Baillie Gifford, 901,420 shares worth $108.2 million, 0.1% of its reported book. New this quarter: Millennium Management, Citadel Advisors, FMR LLC. Sold out: Soros Fund Management, Alyeska. In the quarter, 4 funds added or opened a position and 5 trimmed or sold out; together they bought a net 51,687 shares, about $6.2 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Baillie Gifford | 901,420 | $108.2 million | 0.1% | -358,573 | trimmed | 30 June 2026 | 13F |
| Millennium Management | 425,032 | $51.0 million | 0.0% | +425,032 | new | 30 June 2026 | 13F |
| Renaissance Technologies | 96,600 | $11.6 million | 0.0% | +45,346 | added | 30 June 2026 | 13F |
| Geode Capital Management | 87,934 | $10.6 million | 0.0% | -1,180 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 30,176 | $3.6 million | 0.0% | -52,600 | trimmed | 30 June 2026 | 13F |
| Citadel Advisors | 15,155 | $1.8 million | 0.0% | +15,155 | new | 30 June 2026 | 13F |
| FMR LLC | 7 | $840 | 0.0% | +7 | new | 30 June 2026 | 13F |
| Soros Fund Management | 0 | $0 | 0.0% | -14,500 | exited | 30 June 2026 | 13F |
| Alyeska | 0 | $0 | 0.0% | -7,000 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Adams Street Partners LLC | 1,711,430 | 11.20% | $205.3 million | 46.39% | no change | 13F |
| Price T Rowe Associates Inc. | 1,010,322 | 6.61% | $121.2 million | 0.01% | +272,804 | 13F |
| Baillie Gifford & Co. | 901,420 | 5.90% | $108.2 million | 0.10% | -358,573 | 13F |
| Vanguard Portfolio Management LLC | 840,970 | 5.50% | $100.9 million | 0.01% | +689,757 | 13F |
| Invesco Ltd. | 835,614 | 5.47% | $100.3 million | 0.01% | +429,102 | 13F |
| Vanguard Capital Management LLC | 799,468 | 5.23% | $95.9 million | 0.00% | +617,005 | 13F |
| Neuberger Berman Group LLC | 764,215 | 5.00% | $91.7 million | 0.06% | +55,001 | 13F |
| Bamco Inc. | 742,093 | 4.86% | $89.0 million | 0.13% | +608 | 13F |
| Wasatch Advisors LP | 518,084 | 3.39% | $62.2 million | 0.41% | +148,446 | 13F |
| Millennium Management LLC | 425,032 | 2.78% | $51.0 million | 0.04% | new | 13F |
| Fuller & Thaler Asset Management, Inc. | 418,565 | 2.74% | $50.2 million | 0.14% | new | 13F |
| Emerald Advisers, LLC | 375,858 | 2.46% | $45.1 million | 1.06% | +136,296 | 13F |
| Next Century Growth Investors LLC | 364,467 | 2.39% | $43.7 million | 2.32% | +273,903 | 13F |
| UBS Group AG | 344,287 | 2.25% | $41.3 million | 0.01% | +222,683 | 13F |
| JPMorgan Chase & Co. | 340,371 | 2.23% | $41.0 million | 0.00% | +57,231 | 13F |
| Ameriprise Financial Inc. | 320,612 | 2.10% | $38.5 million | 0.01% | +100,577 | 13F |
| Oberweis Asset Management Inc. | 299,030 | 1.96% | $35.9 million | 0.74% | new | 13F |
| Wells Fargo & Company | 271,554 | 1.78% | $32.6 million | 0.01% | +270,446 | 13F |
| Napean Trading & Investment Co (Singapore) PTE Ltd | 233,333 | 1.53% | $28.0 million | 9.62% | no change | 13F |
| UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 223,933 | 1.47% | $26.9 million | 0.01% | -16,654 | 13F |
| Emerald Mutual Fund Advisers Trust | 203,990 | 1.34% | $24.5 million | 0.86% | +71,784 | 13F |
| AllianceBernstein L.P. | 262,103 | 1.72% | $20.7 million | 0.01% | +38,852 | 13F |
| Penn Capital Management Company, LLC | 129,602 | 0.85% | $15.5 million | 0.99% | +3,267 | 13F |
| BNP Paribas Financial Markets | 122,527 | 0.80% | $14.7 million | 0.01% | +122,519 | 13F |
| Goldman Sachs Group Inc. | 120,325 | 0.79% | $14.4 million | 0.00% | +116,167 | 13F |
| New York State Common Retirement Fund | 117,771 | 0.77% | $14.1 million | 0.02% | +29,089 | 13F |
| Voloridge Investment Management, LLC | 117,063 | 0.77% | $14.0 million | 0.06% | new | 13F |
| BlackRock, Inc. | 114,281 | 0.75% | $13.7 million | 0.00% | +19,121 | 13F |
| Fred Alger Management, LLC | 114,123 | 0.75% | $13.7 million | 0.05% | new | 13F |
| Renaissance Technologies LLC | 96,600 | 0.63% | $11.6 million | 0.02% | +45,346 | 13F |
| T. Rowe Price Investment Management, Inc. | 92,957 | 0.61% | $11.2 million | 0.01% | new | 13F |
| Geode Capital Management, LLC | 87,934 | 0.58% | $10.6 million | 0.00% | -1,180 | 13F |
| Perceptive Advisors LLC | 86,812 | 0.57% | $10.4 million | 0.16% | -5,000 | 13F |
| Lord, Abbett & Co. LLC | 86,293 | 0.56% | $10.4 million | 0.03% | +42,004 | 13F |
| Healthcare of Ontario Pension Plan Trust Fund | 83,300 | 0.55% | $10.0 million | 0.01% | new | 13F |
| HRT Financial LP | 80,709 | 0.53% | $9.7 million | 0.02% | new | 13F |
| Massachusetts Financial Services Co. | 78,977 | 0.52% | $9.5 million | 0.00% | -80,596 | 13F |
| Greenwich Wealth Management LLC | 71,625 | 0.47% | $8.6 million | 0.31% | new | 13F |
| Blue Water Life Science Advisors, LP | 70,000 | 0.46% | $8.4 million | 5.29% | +50,000 | 13F |
| TD Asset Management Inc | 63,482 | 0.42% | $7.6 million | 0.01% | +20,374 | 13F |
| Bank of America Corp. | 59,040 | 0.39% | $7.1 million | 0.00% | +46,333 | 13F |
| Verition Fund Management LLC | 57,000 | 0.37% | $6.8 million | 0.05% | new | 13F |
| Susquehanna International Group, LLP | 54,598 | 0.36% | $6.6 million | 0.01% | +42,112 | 13F |
| Ensign Peak Advisors, Inc | 51,427 | 0.34% | $6.2 million | 0.01% | -74 | 13F |
| Jump Financial, LLC | 46,300 | 0.30% | $5.6 million | 0.05% | new | 13F |
| Marshall Wace, LLP | 44,662 | 0.29% | $5.4 million | 0.01% | new | 13F |
| Fox Hill Wealth Management | 43,724 | 0.29% | $5.2 million | 2.10% | new | 13F |
| F/m Investments LLC | 43,600 | 0.29% | $5.2 million | 0.27% | +26,692 | 13F |
| Weiss Asset Management LP | 43,057 | 0.28% | $5.2 million | 0.07% | new | 13F |
| Vanguard Fiduciary Trust Co. | 42,874 | 0.28% | $5.1 million | 0.00% | +15,083 | 13F |
The 50 largest of the 155 funds that reported a position in BLLN in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on BLLN
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Calls | 21,600 | $2.6 million | 30 June 2026 | 13F |
| Citadel Advisors | Puts | 6,200 | $743,876 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 17 February 2026 | 13G | David Tsao and 1 other | 3.0 million | 6.9% | 31 December 2025 | passive, other (13d-1(d)) | EDGAR |
| 17 February 2026 | 13G | Oguzhan Atay and 1 other | 3.2 million | 7.3% | 31 December 2025 | passive, other (13d-1(d)) | EDGAR |
| 13 February 2026 | 13G | NeoTribe Ventures I, L.P. ("NTV I") and 15 others | 4.4 million | 10.6% | 7 November 2025 | passive, other (13d-1(d)) | EDGAR |
| 20 January 2026 | 13D | Hummingbird Ventures Management NV and 8 others | 7.9 million | 19.6% | 6 November 2025 | The Shares reported herein as being beneficially owned by the Reporting Persons were acquired for investment purposes. The Reporting Persons acquired beneficial ownership of the shares as described in this Schedule 13D for investment purpos | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 31 August 2026 | 1,003 | $93.24 | SEC |
| 27 August 2026 | 34 | $96.22 | SEC |
| 26 August 2026 | 1,696 | $100.08 | SEC |
| 25 August 2026 | 34 | $96.74 | SEC |
| 21 August 2026 | 10,210 | $95.27 | SEC |
| 18 August 2026 | 1,077 | $93.91 | SEC |
| 14 August 2026 | 746 | $94.04 | SEC |
| 7 August 2026 | 273,901 | $91.65 | SEC |
| 4 August 2026 | 4,789 | $137.32 | SEC |
| 3 August 2026 | 21 | $138.60 | SEC |
| 29 July 2026 | 28 | $133.64 | SEC |
| 27 July 2026 | 46 | $126.08 | SEC |
| 24 July 2026 | 1,706 | $128.94 | SEC |
| 21 July 2026 | 34 | $125.14 | SEC |
| 20 July 2026 | 167 | $130.31 | SEC |
| 17 July 2026 | 1 | $128.18 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.