BillionToOne Stock (BLLN) Falls After Hours: Here's What's Driving the Move

BillionToOne, Inc. (NASDAQ: BLLN ) shares fell 28.12% in Wednesday’s after-hours session after the company reported its second-quarter financial results. The stock closed Wednesday’s regular session up 5.43% at $149.97 before falling 28.12% to $107.80 in after-hours trading. BillionToOne is a molecular diagnostics company that develops genetic testing products for prenatal and oncology applications using its proprietary DNA counting technology. Quarter Results For the quarter ended June 30, 2026, BillionToOne reported revenue of $109.4 million, up from $66.6 million in the prior-year period. Net income was $8.1 million, or $0.15 per diluted share, compared with a net loss of $0.2 million, or $(0.02) per diluted share, a year earlier. The company delivered 196,000 tests during the quarter, a 35% increase from a year ago, while gross profit margin improved to 70% from 65%. I...