Company: LBRX
Filing Date: 2025-09-08
Form Type: S-1/A
Source: 0001193125-25-197877
Chunk: 15

Company: LB PHARMACEUTICALS INC
Filing Date: 2025-09-08
Form: S-1/A
Chunk 15
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 this offering and excludes:

| • |     | 427,526 shares of common stock issuable upon the exercise of outstanding stock options under our 2023 Stock                                                                                          
 Incentive Plan, as amended, or the 2023 Plan, as of June 30, 2025, at a weighted-average exercise price of $41.84 per share (which does not take into account the option repricing described below); |

| • |     | 27,943 shares of common stock issuable upon the exercise of outstanding stock options under our 2018 Stock                                                                               
 Incentive Plan, or the 2018 Plan, as of June 30, 2025, at a weighted-average exercise price of $66.40 per share (which does not take into account the option repricing described below); |

| • |     | 10,397 shares of common stock issuable upon the exercise of outstanding stock options under our 2017 Stock                                                                               
 Incentive Plan, or the 2017 Plan, as of June 30, 2025, at a weighted-average exercise price of $49.81 per share (which does not take into account the option repricing described below); |

8

| • |     | 24,919 Class A common stock warrants to purchase 24,919 shares of our common stock, of which 24,919 Class A                                                                                                          
 common stock warrants remain to be exercised as of June 30, 2025, with an exercise price of $0.28 per share, as more fully described in the section titled “Description of Capital Stock—Warrants—Class A Warrants;” |

| • |     | 31,605 Class B common stock warrants to purchase 31,605 shares of our common stock, of which 31,605 Class B                                                                                                          
 common stock warrants remain to be exercised as of June 30, 2025, with an exercise price of $0.28 per share, as more fully described in the section titled “Description of Capital Stock—Warrants—Class B Warrants;” |

| • |     | 54,813 warrants held by Maxim Partners LLC to purchase 54,813 shares of our common stock of which 54,813 warrants                                                                            
 remain to be exercised as of June 30, 2025, with an exercise price of $0.28 per share, as more fully described in the section titled “Description of Capital Stock—Warrants—Maxim Warrants