X0306 4 2021-05-21 0 0001783183 Phathom Pharmaceuticals, Inc. PHAT 0001014330 FIELDS HEIDI C/O PHATHOM PHARMACEUTICALS, INC. 100 CAMPUS DRIVE, SUITE 102 FLORHAM PARK NJ 07932 1 0 0 0 Stock Option (Right to Buy) 35.49 2021-05-21 4 A 0 12500 0.00 A 2031-05-20 Common Stock 12500 12500 D The option was granted pursuant to the Registrant's Non-Employee Director Compensation Program. The option shall vest and/or become exercisable on the first to occur of (A) the first anniversary of the date of grant or (B) the next occurring annual meeting of the Registrant's stockholders, subject to Reporting Person's continuing in service on the Board through such vesting date. /s/ Larry Miller, Attorney-in-Fact for Heidi Kunz 2021-05-24