BillionToOne, Inc. - Class A common stock, par value $0.00001 per share (BLLN) Institutional Ownership

13F Institutional Holders and Ownership History for Q4 2025

Type / Class
Equity / Class A common stock, par value $0.00001 per share
Symbol
BLLN on Nasdaq
Shares outstanding
43,996,623
Price per share
$81.21
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
8,546,380
Total reported value
$699,500,498
% of total 13F portfolios
0.01%
Share change
+8,545,379
Value change
+$699,418,577
Number of holders
87
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of BillionToOne, Inc. - Class A common stock, par value $0.00001 per share (BLLN) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Humming Bird Ventures Management NV 20% $645,491,476 7,887,237 Hummingbird Ventures Management NV 06 Nov 2025
NeoTribe Ventures I, L.P. 11% $422,218,059 4,359,505 Krishna Kittu Kolluri ("Kolluri") 07 Nov 2025
Atay Oguzhan 7.3% $310,584,488 3,206,861 Oguzhan Atay 31 Dec 2025
Tsao David 6.9% $294,014,034 3,035,767 David Tsao 31 Dec 2025

As of 31 Dec 2025, 87 institutional investors reported holding 8,546,380 shares of BillionToOne, Inc. - Class A common stock, par value $0.00001 per share (BLLN). This represents 19% of the company’s total 43,996,623 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of BillionToOne, Inc. - Class A common stock, par value $0.00001 per share (BLLN) together control 18% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
ADAMS STREET PARTNERS LLC 3.9% 1,711,430 53% $140,063,431
BAILLIE GIFFORD & CO 2.9% 1,268,163 0.09% $103,786,460
NEUBERGER BERMAN GROUP LLC 1.6% 700,867 0.04% $57,358,955
NVP ASSOCIATES, LLC 1.2% 513,330 16% $42,010,927
PRICE T ROWE ASSOCIATES INC /MD/ 1.1% 485,283 0% $39,717,000
JPMORGAN CHASE & CO 0.89% 391,958 0% $32,077,843
VANGUARD GROUP INC 0.8% 352,368 0% $28,837,797
Napean Trading & Investment Co (Singapore) PTE Ltd 0.53% 233,333 3.7% $19,095,973
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.52% 227,655 0% $18,631,285
ALLIANCEBERNSTEIN L.P. 0.47% 208,594 0.01% $17,071,333
Invesco Ltd. 0.43% 189,819 0% $15,534,787
EMERALD ADVISERS, LLC 0.43% 188,949 0.48% $15,463,586
Capital International Investors 0.4% 178,000 0% $14,567,520
BAMCO INC /NY/ 0.39% 170,000 0.04% $13,912,800
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.37% 163,400 0% $13,372,656
CITADEL ADVISORS LLC 0.34% 148,868 0.01% $12,183,357
AMERIPRISE FINANCIAL INC 0.28% 122,273 0% $10,006,823
EMERALD MUTUAL FUND ADVISERS TRUST 0.27% 118,134 0.47% $9,668,087
T. Rowe Price Investment Management, Inc. 0.23% 101,136 0.01% $8,277,000
PFM Health Sciences, LP 0.2% 87,547 0.73% $7,164,846
Siren, L.L.C. 0.19% 83,833 0.2% $6,860,893
GEODE CAPITAL MANAGEMENT, LLC 0.19% 82,034 0% $6,715,766
PERCEPTIVE ADVISORS LLC 0.17% 72,812 0.11% $5,958,934
BlackRock, Inc. 0.16% 71,400 0% $5,843,377
BRAIDWELL LP 0.11% 50,000 0.13% $4,092,000

Institutional Holders of BillionToOne, Inc. - Class A common stock, par value $0.00001 per share (BLLN) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 8,546,380 $699,500,498 +$699,418,577 $81.84 87