BillionToOne, Inc. (BLLN) Stock

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5 of the hedge funds AlphaScala tracks reported BLLN in 13F filings for the quarter ended Jun 30, 2026; the largest reported position is Millennium Management's at $51.00M. Company insiders reported 0 open-market buys and 96 sales on SEC Form 4 in the 90 days to Nov 10, 2026.

Which hedge funds own BLLN?

From 13F filings
FundShares HeldPosition ValueChange vs prior Q
Millennium Management
Israel Englander
425K$51.00MNEW
Renaissance Technologies
Jim Simons (founder)
97K$11.59M+88%
Marshall Wace45K$5.36MNEW
D.E. Shaw
David Shaw
26K$3.12M+573%
Citadel
Ken Griffin
15K$1.82MNEW

13F holdings as of Jun 30, 2026

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Are BillionToOne, Inc. insiders buying or selling?

SEC Form 4 filings
90 days to Nov 10, 2026
Buys
0
Sells
96
Net $
-$26.7M
Unique insiders
4
DateInsiderRoleTypeSharesValue
Nov 2, 26Ten Bosch John RoderickSVP of Laboratory OperationsSELL1.4K$160K
Nov 2, 26Ten Bosch John RoderickSVP of Laboratory OperationsSELL1.4K$160K
Nov 2, 26Tsao DavidChief Technology OfficerSELL917$98K
Nov 2, 26Tsao DavidChief Technology OfficerSELL2.3K$251K
Nov 2, 26Tsao DavidChief Technology OfficerSELL3.2K$353K
Nov 2, 26Tsao DavidChief Technology OfficerSELL2.0K$219K
Nov 2, 26Tsao DavidChief Technology OfficerSELL1.1K$125K
Nov 2, 26Tsao DavidChief Technology OfficerSELL300$34K
Nov 2, 26Tsao DavidChief Technology OfficerSELL100$11K
Nov 2, 26Tsao DavidChief Technology OfficerSELL1.1K$114K

SEC Form 4 filings as of Nov 10, 2026

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What does BillionToOne, Inc. do?

BillionToOne, Inc. is a precision diagnostics company specializing in the development of advanced molecular diagnostic tests for healthcare applications. The company’s core innovation is its proprietary single-molecule next-generation sequencing (smNGS) platform, which enables highly sensitive and accurate detection and quantification of DNA molecules at the single-molecule level. This technological breakthrough underpins BillionToOne’s flagship product lines, including UNITY Complete, a non-invasive prenatal screening test that assesses fetal risk for chromosomal aneuploidies, recessive conditions such as sickle cell disease and cystic fibrosis, and fetal antigens, all from a single maternal blood draw. Additionally, the company’s Northstar Select and Northstar Response tests are designed for oncology, offering sensitive liquid biopsy solutions that guide therapy selection and provide longitudinal monitoring of cancer burden. BillionToOne’s molecular counting technologies are intended to address significant unmet needs in both the prenatal and oncology sectors, enabling earlier, safer, and more comprehensive disease detection. With a mission to improve healthcare accessibility and patient outcomes, BillionToOne plays a transformative role in the diagnostics and research segment of the healthcare market, supporting the shift toward personalized and non-invasive medicine.

CEO
Dr. Oguzhan Atay Ph.D.
Employees
713
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