Company: PHAT
Filing Date: 2025-04-03
Form Type: S-8
Source: 0001193125-25-072460
Chunk: 4

Company: Phathom Pharmaceuticals, Inc.
Filing Date: 2025-04-03
Form: S-8
Chunk 4
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| 23.1    |     | Consent of Independent Registered Public Accounting Firm                                                                                                                                     |     |                           |     |            |     |         |     |             |     | X        |
| 23.3    |     | Consent of Latham & Watkins LLP (included in Exhibit 5.1 hereto)                                                                                                                             |     |                           |     |            |     |         |     |             |     | X        |
| 24.1    |     | Power of Attorney (see signature page)                                                                                                                                                       |     |                           |     |            |     |         |     |             |     | X        |
| 107.1   |     | Filing Fee Table                                                                                                                                                                             |     |                           |     |            |     |         |     |             |     | X        |

Item 9. Undertakings.

| (a) | The undersigned Registrant hereby undertakes: |

| (1) | To file, during any period in which offers or sales are being made, a post-effective amendment to this 
 registration statement,                                                                                |

| (i) | to include any prospectus required by Section 10(a)(3) of the Securities Act; |

| (ii) | to reflect in the prospectus any facts or events arising after the effective date of this registration                                                                                                                                                   
 statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this registration statement. Notwithstanding the foregoing, any increase or      
 decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of 
 prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20% change in the maximum aggregate offering price set forth in the “Calculation of Filing Fee Tables” in             
 the effective registration statement; and                                                                                                                                                                                                                |

| (iii) | to include any material information with respect to the plan of distribution not previously disclosed in this 
 registration statement or any material change to such information in this registration statement;             |

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if this registration statement is on Form S-8and the information required to be included in a post-effective amendment by