BLLN

Billiontoone, Inc.

A molecular diagnostics company that reads cell-free DNA from a simple blood draw to offer ultrasensitive prenatal and cancer tests. Its UNITY prenatal portfolio screens for fetal conditions and antigens without needing a father's sample, while its Northstar oncology tests guide therapy choices and monitor response. Founded in 2016 by two scientists who met as Princeton roommates, the name "BillionToOne" captures the ability to spot a single DNA letter among the three billion in the human genome — and, the founders joke, it was the only domain name they could afford.