0002153598 2026-10-15 2026-10-15 false 0002153598 8-K 2026-10-15 Frazier Life Sciences Acquisition Corp. II E9 001-43504 98-1964369 1001 Page Mill Road Building 4 Suite 200B Palo Alto CA 93404 (650) 325-5156 false false false false Class A ordinary shares, par value $0.0001 per share FLSC NASDAQ true false