Ad Hoc Announcement Pursuant to Art. 53 LR Geneva, Switzerland, September 23, 2025 - Addex Therapeutics (SIX and Nasdaq: ADXN), a clinical-stage biopharmaceutical company focused on developing a portfolio of novel small molecule allosteric modulators for neurological disorders, today announced the appointment the Bank of New-York Mellon (BNY) as its new ADS depositary agent. This change is expected to become effective on October 6, 2025.  The appointment of BNY has no impact on the fees paid by ADS holders. ...