Company: LBRX
Filing Date: 2025-09-08
Form Type: S-1/A
Source: 0001193125-25-197877
Chunk: 338

Company: LB PHARMACEUTICALS INC
Filing Date: 2025-09-08
Form: S-1/A
Chunk 338
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Affiliates Persons seeking to sell restricted securities who are our affiliates at the time of, or any time during the three months preceding, a sale, would be subject to the restrictions described above. They are also subject to additional restrictions, by which such person would be required to comply with the manner of sale and notice provisions of Rule 144 and would be entitled to sell within any three-month period only that number of securities that does not exceed the greater of either of the following:

| • |     | 1% of the number of shares of our common stock then outstanding, which will equal approximately 201,001 shares 
 immediately after the completion of this offering; or                                                          |

| • |     | the average weekly trading volume of our common stock on the stock exchange on which our shares are listed during 
 the four calendar weeks preceding the filing of a notice on Form 144 with respect to the sale.                    |

Additionally, persons who are our affiliates at the time of, or any time during the three months preceding, a sale may sell unrestricted securities under the requirements of Rule 144 described above, without regard to the six-monthholding period of Rule 144, which does not apply to sales of unrestricted securities. Rule 701 Rule 701 under the Securities Act, as in effect on the date of this prospectus, permits resales of shares in reliance upon Rule 144 but without compliance with certain restrictions of Rule 144, including the holding period requirement. Most of our employees, executive officers or directors who purchased shares under a written compensatory plan or contract may be entitled to rely on the resale provisions of Rule 701, but all holders of Rule 701 shares are required to wait until 90 days after the date of this prospectus before selling their shares. However, substantially all Rule 701 shares are subject to lock-upagreements as described below and in the section titled “Underwriting” and will become eligible for sale upon the expiration of the restrictions set forth in those agreements. Form S-8Registration Statements We intend to file with the SEC a registration statement on Form S-8 underthe Securities Act covering the shares of common stock reserved for issuance under the 2017 Plan, the 2018 Plan, the 2023 Plan, the 2025 Plan and the ESPP. The registration statement on Form S-8 isexpected to be filed and become effective as soon as practicable after the completion of this offering. Accordingly, shares registered under the registration statement on Form S-8 willbe available for sale