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BillionToOne Goes Public — The Startup That Made Genetic Testing Universal

calendar_today November 6, 2025 person Jared Friedman domain y-combinator

Today, BillionToOne goes public, becoming YC’s fourth publicly traded biotech company. More importantly, they have built one of the most important genetic tests in the U.S. Today, 1 in 11 babies born in the US are tested with BillionToOne’s fetal genetic test.

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