0001783183 2026-09-29 2026-09-29 false 0001783183 8-K 2026-09-29 PHATHOM PHARMACEUTICALS, INC. DE 001-39094 82-4151574 100 Campus Drive Suite 102 Florham Park NJ 07932 (877) 742-8466 false false false false Common Stock, par value $0.0001 per share PHAT NASDAQ false