Why Did GERN Stock Tumble 10% Pre-Market Today?
Geron Corp. (GERN) reported Q4 2025 revenue of $48M, missing estimates, with an EPS loss of $0.05. RYTELO sales grew 9% QoQ to $48M. The stock fell 10% premarket. Operating costs were $254.7M, with restructuring charges of $17M. Geron projects 2026 RYTELO revenue of $220M-$240M.

