0000921299 2025-11-10 2025-11-10 0000921299 false 8-K 2025-11-10 FIBROGEN, INC. DE 001-36740 77-0357827 350 Bay Street Suite 100 #6009 San Francisco CA 94133 415 978-1200 false false false false Common Stock, $0.01 par value FGEN NASDAQ false