X0306 4 2022-09-01 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 2022-09-01 4 A 0 7500 0.00 A 85246 D Common Stock 2235.9 I by 401(k) Represents restricted stock units ("RSUs") granted on September 1, 2022. Fifty percent (50%) of the total number of RSUs granted vest on each of March 1, 2023 and June 1, 2023, subject to the Reporting Person's continued service on each applicable vesting date. Each RSU represents a contingent right to receive one share of common stock of the Issuer. Includes 1,151 shares acquired under the Phathom Pharmaceuticals, Inc. employee stock purchase plan in July 2022. Includes 1,511.80 shares acquired under the Phathom Pharmaceuticals, Inc. 401(k) plan. /s/ Larry Miller, Attorney-in-Fact for Terrie Curran 2022-09-02