BillionToOne (BLLN) stock slides 4% in thin year-end trade as investors look to January catalysts
NEW YORK, December 31, 2025, 15:27 ET — Regular session. Shares of BillionToOne fell about 4% on Wednesday, sliding $3.49 to $81.61 in afternoon trading. The stock has traded between $81.25 and $89.36, with about 243,000 shares changing hands.