BillionToOne BLLN Institutional Ownership

NASDAQ BLLN

$104.67 +1.17 (+1.13%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

155 Institutions

Increased 127 81.9%

Unchanged 15 9.7%

Reduced 13 8.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

32.63%

▲+7.97 pp QoQ

Shares Held by Institutions

15.28Mn

of 46.83Mn outstanding

▲+34.74% QoQ

Shares Outstanding

46.83Mn

31.55Mn held outside 13F filers

Institutional Investors

155

filed 13F for Jun 2026

▲+65 vs prior quarter

Net Shares Added (QoQ)

+3.94Mn

accumulated since last quarter

Value of Holdings

$1.58Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 10, 2026

BillionToOne, Inc. (NASDAQ:BLLN) appeared in the 13F filings of 155 institutional investors for the quarter ended June 30, 2026.

Their combined stake equaled 32.63% of outstanding shares in Q2 2026, up from 24.66% in Q1 2026.
Total shares held in BillionToOne rose 34.74% from Q1 2026.
Of the 155 holders, 127 added to their positions, 13 reduced their stakes and 15 left their positions unchanged in Q2 2026.
In total, institutional investors held 15.28Mn shares of BillionToOne at the end of Q2 2026, up 3.94Mn from the prior quarter.
Adams Street Partners LLC led 13F holders of BLLN with 1.71Mn shares as of June 30, 2026, or 3.65% of shares outstanding.
Among holders that already owned BillionToOne, the biggest buyers in Q2 2026 were Vanguard Portfolio Management LLC (+689.76K shares), Vanguard Capital Management LLC (+617K shares), Invesco Ltd. (+429.1K shares), Next Century Growth Investors LLC (+273.9K shares) and T. Rowe Price Associates Inc (+272.8K shares).
Among holders that kept a stake in BillionToOne, the biggest sellers in Q2 2026 were Civilization Ventures Management, LLC (-1.1Mn shares), Baillie Gifford & Co (-358.57K shares), Massachusetts Financial Services Co (-80.6K shares), Two Sigma Investments, LP (-52.6K shares) and UBS Asset Management Americas (-16.65K shares).
BillionToOne's 10 largest institutional shareholders as of Q2 2026 were Adams Street Partners LLC (1.71Mn shares), T. Rowe Price Associates Inc (1.01Mn shares), Baillie Gifford & Co (901.42K shares), Vanguard Portfolio Management LLC (840.97K shares), Invesco Ltd. (835.61K shares), Vanguard Capital Management LLC (799.47K shares), Neuberger Berman Group LLC (764.22K shares), BAMCO Inc (742.09K shares), Wasatch Advisors LP (518.08K shares) and Millennium Management LLC (425.03K shares), per Business Quant data.

Form 13F Holdings

155 Institutional Holders

Report period 30 Jun, 2026

Total shares held 15.28Mn

Of outstanding 32.63%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	ADAMS STREET PARTNERS LLC	0001193586	1,711,430	3.65%	0	0.00%	$205.34Mn
2	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	1,010,322	2.16%	▲272,804	+36.99%	$121.22K
3	BAILLIE GIFFORD & CO	0001088875	901,420	1.93%	▼358,573	-28.46%	$108.15Mn
4	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	840,970	1.80%	▲689,757	+456.15%	$100.90Mn
5	Invesco Ltd.	0000914208	835,614	1.78%	▲429,102	+105.56%	$100.26Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	799,468	1.71%	▲617,005	+338.15%	$95.92Mn
7	Neuberger Berman Group LLC	0001465109	764,215	1.63%	▲55,001	+7.76%	$91.69Mn
8	BAMCO INC /NY/	0001017918	742,093	1.58%	▲608	+0.08%	$89.04Mn
9	WASATCH ADVISORS LP	0000814133	518,084	1.11%	▲148,446	+40.16%	$62.16Mn
10	MILLENNIUM MANAGEMENT LLC	0001273087	425,032	0.91%	▲425,032	0.00%	$51.00Mn
11	FULLER & THALER ASSET MANAGEMENT, INC.	0001082327	418,565	0.89%	▲418,565	0.00%	$50.22Mn
12	EMERALD ADVISERS, LLC	0001015083	375,858	0.80%	▲136,296	+56.89%	$45.10Mn
13	NEXT CENTURY GROWTH INVESTORS LLC	0001134007	364,467	0.78%	▲273,903	+302.44%	$43.73Mn
14	UBS Group AG	0001610520	344,287	0.74%	▲222,683	+183.12%	$41.31Mn
15	Jpmorgan Chase & Co	0000019617	340,371	0.73%	▲57,231	+20.21%	$41.01Mn
16	Ameriprise Financial Inc	0000820027	320,612	0.68%	▲100,577	+45.71%	$38.50Mn
17	OBERWEIS ASSET MANAGEMENT INC/	0000937886	299,030	0.64%	▲299,030	0.00%	$35.88Mn
18	Wells Fargo & Company/Mn	0000072971	271,554	0.58%	▲270,446	+24,408.48%	$32.58Mn
19	ALLIANCEBERNSTEIN L.P.	0001109448	262,103	0.56%	▲38,852	+17.40%	$20.69Mn
20	Napean Trading & Investment Co (Singapore) PTE Ltd	0002011874	233,333	0.50%	0	0.00%	$28.00Mn

Showing 1 to 20 of 155 holders