BillionToOne is trading at $95.50, up +4.18%, in what appears to be an unexplained rebound after the August 18 decline.

  • No new BillionToOne announcement dated August 20, 2026, was identified; the latest company release concerns a prospective cfDNA study published August 18.
  • The broader biotech sector is down, and major U.S. indexes are also lower, so today’s gain does not clearly align with sector or market direction.