X0306 4 2022-01-19 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 2022-01-19 4 A 0 41250 0.00 A 44095 D Common Stock 463.55 I by 401(k) Stock Option (Right to Buy) 15.21 2022-01-19 4 A 0 206250 0.00 A 2032-01-18 Common Stock 206250 206250 D Represents restricted stock units ("RSUs") granted on January 19, 2022. One third (1/3) of the total number of RSUs granted vest on each of the first three anniversaries of January 19, 2022, the vesting commencement date, subject to the Reporting Person's continued service on the applicable vesting date. Each RSU represents a contingent right to receive one share of common stock of the Issuer. Includes 1,705 shares acquired under the Phathom Pharmaceuticals, Inc. employee stock purchase plan in January 2021, July 2021 and January 2022. The stock option will vest with respect to 25% of the shares of common stock on January 19, 2023, and will vest with respect to the remaining shares in equal monthly installments over the following three years, subject to the reporting person's continuous service to the Company on the applicable vesting dates. /s/ Larry Miller, Attorney-in-Fact for Terrie Curran 2022-01-21