X0609 4 2026-05-19 0001783183 Phathom Pharmaceuticals, Inc. PHAT 0001188940 COLA MICHAEL F false C/O PHATHOM PHARMACEUTICALS, INC. 100 CAMPUS DRIVE, SUITE 102 FLORHAM PARK NJ 07932 true false false false false Common Stock 2026-05-19 4 A false 24122 0 A 63920 D The Restricted Stock Units ("RSUs") were granted on May 19, 2026, pursuant to the Issuer's Non-Employee Director Compensation Program. 100% of the total number of RSUs granted shall vest on the first to occur of (A) the first anniversary of the date of grant or (B) the next occurring annual meeting of the Issuer's stockholders, subject to the Reporting Person's continuing service on the Board through such vesting date. Each RSU represents a contingent right to receive one share of common stock of the Issuer. /s/ Anne Marie Cook, Attorney-in-Fact for Michael F. Cola 2026-05-21