0000899460 2026-05-20 2026-05-20 false 0000899460 8-K 2026-05-20 MannKind Corporation DE 000-50865 13-3607736 1 Casper Street Danbury CT 06810 (818) 661-5000 false false false false Common Stock, par value $0.01 per share MNKD NASDAQ false