Company: LBRX
Filing Date: 2025-09-18
Form Type: SCHEDULE 13G
Source: 0001831942-25-000020
Chunk: 0

Company: LB PHARMACEUTICALS INC
Filing Date: 2025-09-18
Form: SCHEDULE 13G
Chunk 0
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 the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. |

| Commodore Capital LP |

| Signature:   Michael Kramarz      
   Name/Title:  Managing Partner   
   Date:        09/18/2025         |

| Commodore Capital Master LP |

| Signature:   Michael Kramarz          
   Name/Title:  Authorized Signatory   
   Date:        09/18/2025             |

| Robert Egen Atkinson |

| Signature:   Robert Egen Atkinson     
   Name/Title:  Authorized Sigantory   
   Date:        09/18/2025             |

| Michael Kramarz |

| Signature:   Michael Kramarz          
   Name/Title:  Authorized Signatory   
   Date:        09/18/2025             |

| Exhibit Information               |
| Exhibit 1: Joint Filing Agreement |