Company: GANX
Filing Date: 2025-05-28
Form Type: S-3
Source: 0001104659-25-053619
Chunk: 6

Company: Gain Therapeutics, Inc.
Filing Date: 2025-05-28
Form: S-3
Chunk 6
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 This prospectus and any prospectus supplement do not constitute an offer to sell or a solicitation of an offer to buy any securities in any circumstances in which such offer or solicitation is unlawful. Neither the delivery of this prospectus or any prospectus supplement nor any sale made hereunder shall, under any circumstances, create any implication that there has been no change in our affairs since the date of this prospectus or such prospectus supplement or that the information incorporated by reference to this prospectus or any prospectus supplement is correct as of any time after its date.

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TABLE OF CONTENTS

### PROSPECTUS SUMMARY
The following summary highlights some information from this prospectus. It is not complete and does not contain all of the information that you should consider before making an investment decision. You should read this entire prospectus, including the “Risk Factors” section on page 4 and the disclosures to which that section refers you, the financial statements and related notes and the other more detailed information appearing elsewhere or incorporated by reference into this prospectus before investing in any of the securities described in this prospectus.

### Overview
We are a biotechnology company developing novel small molecule therapeutics to treat diseases across several therapeutic areas, including, central nervous system (“CNS”) disorders, lysosomal storage disorders (“LSDs”), metabolic disorders, and other diseases that can be targeted through protein degradation, such as oncology.

GT-02287 — our lead product candidate, for the treatment of Parkinson’s disease, is currently being evaluated in a Phase 1b study in people with Parkinson’s disease with or without a GBA1 mutation.

We have generated an extensive preclinical data package providing evidence of the mechanism of action and safety of GT-02287. In preclinical models of GBA1 and idiopathic Parkinson’s disease, GT-02287 has been shown to restore glucocerebrosidase, or GCase, function in the lysosome, improve mitochondrial health, reduce toxic lipid substrates and toxic forms of alpha-synuclein, reduce neuroinflammation, improve survival of dopaminergic neurons, increase dopamine levels, completely restore locomotor function and improve cognition, and reduce plasma-based neurodegeneration maker, neurofilament light chain (NfL) back to the level of healthy animals.

In September 2024, we reported results from a first-in-human Phase 1 clinical trial completed in Australia to assess the safety, tolerability, pharmacokinetics, and food