X0306 4/A 2022-01-19 2022-01-21 0 0001783183 Phathom Pharmaceuticals, Inc. PHAT 0001690298 Curran Terrie C/O PHATHOM PHARMACEUTICALS, INC. 100 CAMPUS DRIVE, SUITE 102 FLORHAM PARK NJ 07932 1 1 0 0 President and Chief Executive Common Stock 42955 D Common Stock 724.1 I by 401(k) On January 21, 2022, the Reporting Person filed a Form 4 (the "Original Form 4") which inadvertently reported incorrect amounts of securities beneficially owned following the transactions reported. Following the transactions reported in the Original Form 4, the Reporting Person (i) directly owns 42,955 shares of Common Stock, which includes 41,250 restricted stock units, and (ii) indirectly owns 724.10 shares of Common Stock through a 401(k) account. /s/ Larry Miller, Attorney-in-Fact for Terrie Curran 2022-03-11