X0407 4 2023-04-11 0 0001783183 Phathom Pharmaceuticals, Inc. PHAT 0001791412 Nabulsi Azmi C/O PHATHOM PHARMACEUTICALS, INC. 100 CAMPUS DRIVE, SUITE 102 FLORHAM PAK NJ 07932 0 1 0 0 Chief Operating Officer 0 Common Stock 2023-04-11 4 P 0 10000 8.26 A 99567 D Common Stock 2355.22 I by 401(k) Common Stock 785700 I by Trust The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $8.20 to $8.50. The Reporting Person undertakes to provide Phathom Pharmaceuticals, Inc. (the "Company"), any security holder of the Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote. /s/ Larry Miller, Attorney-in-Fact for Azmi Nabulsi 2023-04-11