BillionToOne, Inc. (BLLN) Institutional Ownership

Ownership Summary

BillionToOne, Inc. (NASDAQ:BLLN) is held by 89 institutional investors per 13F filings through March 2026.

• Their combined ownership stood at 24.7% of outstanding shares in March 2026, down from 57.9% in December 2025.
• They increased total shares held in BillionToOne by 37.03% from last quarter, and the number of investors in BLLN stayed flat annually.
• Activity in BLLN broke down as 61 buyers, 15 sellers, and 13 unchanged among 89 total holders.
• The aggregate institutional position in BillionToOne amounted to 11.34Mn shares as of March 2026, up by 3.06Mn shares quarter on quarter, and with no net change year over year.
• As of March 31, 2026, the biggest holder of BillionToOne is ADAMS STREET PARTNERS LLC at 1.71Mn shares, representing 3.73% of shares outstanding.
• The largest buyers of BillionToOne for the quarter ending March 2026 were PRICE T ROWE ASSOCIATES INC /MD/ (737.52K), BAMCO INC /NY/ (571.48K), WASATCH ADVISORS LP (369.64K), Invesco Ltd. (216.69K), VANGUARD CAPITAL MANAGEMENT LLC (182.46K).
• Leading sellers of BillionToOne shares for the quarter ending March 2026 were Jpmorgan Chase & Co (108.82K), Goldman Sachs Group Inc (37.27K), MYDA Advisors LLC (36.2K), BAILLIE GIFFORD & CO (8.17K), XTX Topco Ltd (7.5K).
• According to Business Quant data, leading holders of BLLN for March 2026 are ADAMS STREET PARTNERS LLC (1.71Mn), BAILLIE GIFFORD & CO (1.26Mn), Civilization Ventures Management, LLC (1.1Mn), BAMCO INC /NY/ (741.48K), PRICE T ROWE ASSOCIATES INC /MD/ (737.52K), Neuberger Berman Group LLC (709.21K), NVP Associates, LLC (513.33K), Invesco Ltd. (406.51K), WASATCH ADVISORS LP (369.64K), Jpmorgan Chase & Co (283.14K).