X0306 4 2020-07-13 0 0001783183 Phathom Pharmaceuticals, Inc. PHAT 0001765274 Branning Todd P. C/O PHATHOM PHARMACEUTICALS, INC. 100 CAMPUS DRIVE, SUITE 102 FLORHAM PARK NJ 07932 0 1 0 0 Chief Financial Officer Stock Option (Right to Buy) 29.43 2020-07-13 4 A 0 85000 0.00 A 2030-07-12 Common Stock 85000 85000 D The option will vest with respect to one-fourth of the shares of common stock on July 13, 2021, 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 Todd Branning 2020-07-13