🔴 BillionToOne is trading 4.5% down today as S&P 500 and Nasdaq Composite fall

BillionToOne is trading 4.5% down at $89.71 after opening-session weakness on August 18, 2026, amid broad market weakness.

• The S&P 500 is down 0.58% and Nasdaq Composite 1.32%.
• BillionToOne launched its 130-gene Unity Fetal Risk Screen on August 17; available reporting does not directly link it to today’s decline.
• Recent earnings coverage cited investor concerns about unchanged guidance and growth expectations.