X0407 4 2023-04-06 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 0 Common Stock 2023-04-06 4 P 0 12919 7.8199 A 188290 D Common Stock 2235.9 I by 401(k) The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.79 to $7.85. 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 Terrie Curran 2023-04-07