BLLN Institutional Ownership & Shareholders
BillionToOne, Inc. (BLLN) is currently held by 159 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $1.76B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Adams Street Partners Llc is currently the largest disclosed institutional shareholder of BLLN tracked by InsiderSet, reporting ownership valued at approximately $205.34M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $193.94M, representing an estimated loss of -5.55% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 56% of the total disclosed BLLN value among the investors covered in this analysis. Major shareholders include Adams Street Partners Llc, Price T Rowe Associates Inc, Baillie Gifford & Co, and several other long-term asset managers with concentrated positions in BillionToOne, Inc. (BLLN).
This page ranks the largest institutional BLLN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
159
Total Reported Value
$1.76B
Largest Holder
Adams Street Partners Llc
Largest Position
$205.34M
Insider Transactions (90d)
43
Latest Filing Quarter
Q2 2026
New Institutional Positions
171
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Adams Street Partners Llc | 46.39% | 1,711,430 | $205,337,371 | $193,939,248 | -$11,398,123 | -5.55% | |
| Price T Rowe Associates Inc | 0.01% | 1,010,322 | $121,220,000 | $114,489,689 | -$6,730,311 | -5.55% | |
| Baillie Gifford & Co | 0.10% | 901,420 | $108,152,370 | $102,148,914 | -$6,003,456 | -5.55% | |
| Vanguard Portfolio Management Llc | 0.00% | 840,970 | $100,899,581 | $95,298,720 | -$5,600,861 | -5.55% | |
| Invesco Ltd. | 0.01% | 835,614 | $100,256,968 | $94,691,778 | -$5,565,190 | -5.55% | |
| Vanguard Capital Management Llc | 0.00% | 799,468 | $95,920,171 | $90,595,714 | -$5,324,457 | -5.55% | |
| Bamco Inc | 0.13% | 742,093 | $89,036,318 | $84,093,979 | -$4,942,339 | -5.55% | |
| Neuberger Berman Group Llc | 0.04% | 700,867 | $57,358,955 | $79,422,248 | +$22,063,293 | +38.47% | |
| Wasatch Advisors Lp | 0.40% | 507,258 | $53,992,542 | $57,482,477 | +$3,489,935 | +6.46% | |
| Millennium Management Llc | 0.03% | 425,032 | $50,995,339 | $48,164,626 | -$2,830,713 | -5.55% | |
| Fuller & Thaler Asset Management, Inc. | 0.14% | 418,565 | $50,219,447 | $47,431,786 | -$2,787,661 | -5.55% | |
| Emerald Advisers, Llc | 1.06% | 375,858 | $45,095,443 | $42,592,229 | -$2,503,214 | -5.55% | |
| Next Century Growth Investors Llc | 2.32% | 364,467 | $43,728,750 | $41,301,400 | -$2,427,350 | -5.55% | |
| Ubs Group Ag | 0.01% | 344,287 | $41,307,554 | $39,014,603 | -$2,292,951 | -5.55% | |
| Jpmorgan Chase & Co | 0.00% | 340,371 | $41,013,056 | $38,570,842 | -$2,442,214 | -5.95% | |
| Ameriprise Financial Inc | 0.01% | 320,612 | $38,497,422 | $36,331,752 | -$2,165,670 | -5.63% | |
| Oberweis Asset Management Inc/ | 0.74% | 299,030 | $35,877,619 | $33,886,080 | -$1,991,539 | -5.55% | |
| Wells Fargo & Company/Mn | 0.01% | 271,554 | $32,581,049 | $30,772,499 | -$1,808,550 | -5.55% | |
| Napean Trading & Investment Co (Singapore) Pte Ltd | 9.62% | 233,333 | $27,995,293 | $26,441,296 | -$1,553,997 | -5.55% | |
| Emerald Mutual Fund Advisers Trust | 0.86% | 203,990 | $24,474,720 | $23,116,147 | -$1,358,573 | -5.55% | |
| Alliancebernstein L.P. | 0.01% | 262,103 | $20,690,411 | $29,701,512 | +$9,011,101 | +43.55% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 240,587 | $18,991,938 | $27,263,319 | +$8,271,381 | +43.55% | |
| Penn Capital Management Company, Llc | 0.99% | 129,602 | $15,549,648 | $14,686,499 | -$863,149 | -5.55% | |
| Bnp Paribas Financial Markets | 0.01% | 122,527 | $14,700,789 | $13,884,760 | -$816,029 | -5.55% | |
| Goldman Sachs Group Inc | 0.00% | 120,325 | $14,436,593 | $13,635,229 | -$801,364 | -5.55% | |
| New York State Common Retirement Fund | 0.02% | 117,771 | $14,130,165 | $13,345,810 | -$784,355 | -5.55% | |
| Voloridge Investment Management, Llc | 0.06% | 117,063 | $14,045,219 | $13,265,579 | -$779,640 | -5.55% | |
| Blackrock, Inc. | 0.00% | 114,281 | $13,711,434 | $12,950,323 | -$761,111 | -5.55% | |
| Fred Alger Management, Llc | 0.05% | 114,123 | $13,692,478 | $12,932,418 | -$760,060 | -5.55% | |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 96,600 | $11,590,068 | $10,946,712 | -$643,356 | -5.55% |
| T. Rowe Price Investment Management, Inc. | 0.01% | 92,957 | $11,153,000 | $10,533,887 | -$619,113 | -5.55% | |
| Geode Capital Management, Llc | 0.00% | 87,934 | $10,553,783 | $9,964,681 | -$589,102 | -5.58% | |
| Perceptive Advisors Llc | 0.16% | 86,812 | $10,415,704 | $9,837,536 | -$578,168 | -5.55% | |
| Lord, Abbett & Co. Llc | 0.03% | 86,293 | $10,353,000 | $9,778,723 | -$574,277 | -5.55% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.01% | 83,300 | $9,994,334 | $9,439,556 | -$554,778 | -5.55% | |
| Hrt Financial Lp | 0.02% | 80,709 | $9,683,000 | $9,145,944 | -$537,056 | -5.55% | |
| Massachusetts Financial Services Co | 0.00% | 78,977 | $9,475,661 | $8,949,674 | -$525,987 | -5.55% | |
| Blue Water Life Science Advisors, Lp | 5.29% | 70,000 | $8,398,600 | $7,932,400 | -$466,200 | -5.55% | |
| Td Asset Management Inc | 0.01% | 63,482 | $7,616,570 | $7,193,780 | -$422,790 | -5.55% | |
| Bank Of America Corp | 0.00% | 59,040 | $7,083,619 | $6,690,413 | -$393,206 | -5.55% | |
| Verition Fund Management Llc | 0.05% | 57,000 | $6,838,860 | $6,459,240 | -$379,620 | -5.55% | |
| Susquehanna International Group, Llp | 0.01% | 54,598 | $6,550,668 | $6,187,045 | -$363,623 | -5.55% | |
| Jump Financial, Llc | 0.05% | 46,300 | $5,555,074 | $5,246,716 | -$308,358 | -5.55% | |
| Marshall Wace, Llp | 0.00% | 44,662 | $5,358,546 | $5,061,098 | -$297,448 | -5.55% | |
| Fox Hill Wealth Management | 2.10% | 43,724 | $5,245,998 | $4,954,804 | -$291,194 | -5.55% | |
| F/M Investments Llc | 0.27% | 43,600 | $5,231,128 | $4,940,752 | -$290,376 | -5.55% | |
| Weiss Asset Management Lp | 0.06% | 43,057 | $5,165,979 | $4,879,219 | -$286,760 | -5.55% | |
| Vanguard Fiduciary Trust Co | 0.00% | 42,874 | $5,144,023 | $4,858,482 | -$285,541 | -5.55% | |
| Manufacturers Life Insurance Company, The | 0.00% | 41,697 | $5,002,806 | $4,725,104 | -$277,702 | -5.55% | |
| State Street Corp | 0.00% | 35,718 | $4,285,446 | $4,047,564 | -$237,882 | -5.55% |
Frequently asked questions about BLLN
Who are the largest institutional holders of BLLN?
The largest institutional holders of BLLN reported in the latest SEC Form 13F filings include Adams Street Partners Llc, Price T Rowe Associates Inc, Baillie Gifford & Co, Vanguard Portfolio Management Llc, and Invesco Ltd.. InsiderSet ranks institutional holders by their latest reported BLLN position.
What is BLLN institutional ownership?
This page tracks BLLN positions reported by institutional investment managers through SEC Form 13F. BillionToOne, Inc. (BLLN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own BLLN?
InsiderSet currently tracks 159 institutional managers reporting BLLN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of BLLN shareholders.
How much BLLN stock do institutions own?
Institutional investment managers disclosed approximately $1.76B in BLLN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was BLLN institutional ownership last updated?
The latest BLLN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional BLLN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its BLLN position after the reporting date.
Are institutions buying or selling BLLN?
Institutional buying and selling can be analyzed by comparing BLLN positions across consecutive 13F reporting periods. InsiderSet's BLLN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View BLLN ownership changes.
How has BLLN institutional ownership changed over time?
InsiderSet tracks BLLN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.