BillionToOne, Inc. (BLLN) Stock
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 91 sales on SEC Form 4 in the 90 days to Oct 21, 2026.
Which hedge funds own BLLN?
From 13F filings| Fund | Shares Held | Position Value | Change vs prior Q |
|---|---|---|---|
| Millennium Management Israel Englander | 425K | $51.00M | NEW |
| Renaissance Technologies Jim Simons (founder) | 97K | $11.59M | +88% |
| Marshall Wace | 45K | $5.36M | NEW |
| D.E. Shaw David Shaw | 26K | $3.12M | +573% |
| Citadel Ken Griffin | 15K | $1.82M | NEW |
13F holdings as of Jun 30, 2026
Explore all tracked funds →Are BillionToOne, Inc. insiders buying or selling?
SEC Form 4 filings| Date | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| Oct 15, 26 | Atay Oguzhan | Chairman and CEO | SELL | 900 | $89K |
| Oct 15, 26 | Atay Oguzhan | Chairman and CEO | SELL | 1.9K | $186K |
| Oct 15, 26 | Atay Oguzhan | Chairman and CEO | SELL | 1.3K | $128K |
| Oct 15, 26 | Atay Oguzhan | Chairman and CEO | SELL | 980 | $100K |
| Oct 15, 26 | Atay Oguzhan | Chairman and CEO | SELL | 133 | $14K |
| Oct 14, 26 | Atay Oguzhan | Chairman and CEO | SELL | 3.1K | $303K |
| Oct 14, 26 | Atay Oguzhan | Chairman and CEO | SELL | 100 | $10K |
| Oct 14, 26 | Atay Oguzhan | Chairman and CEO | SELL | 2.7K | $261K |
| Oct 12, 26 | Atay Oguzhan | Chairman and CEO | SELL | 2.0K | $180K |
| Oct 12, 26 | Atay Oguzhan | Chairman and CEO | SELL | 2.6K | $238K |
SEC Form 4 filings as of Oct 21, 2026
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Powered by TradingViewWhat 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.