Press Release: Addex Enters into At-The-Market ADS Offering Agreement with H.C. Wainwright & Co. LLC.

Ad Hoc Announcement Pursuant to Art. 53 LR

Geneva, Switzerland, January 31, 2024 -- Addex Therapeutics (SIX: ADXN), a clinical-stage pharmaceutical company pioneering allosteric modulation-based drug discovery and development, announced today that the company has entered into an At The Market Offering Agreement (the "ATM Agreement") with H.C. Wainwright & Co., LLC ("H.C. Wainwright") with respect to an at-the-market offering program under which the Company may offer and sell, from time to time at its sole discretion, ADSs having an aggregate offering price of up to $2.1 million through H.C. Wainwright as its sales agent. The issuance and sale, if any, of the ADSs by the Company under the ATM Agreement will be made pursuant to the Company's effective registration statement on Form F-3 (Registration Statement No. 333-255089).

H.C. Wainwright may sell the ADSs by any method permitted by law deemed to be an "at the market offering" as defined in Rule 415(a)(4) of the Securities Act of 1933, as amended, including, without limitation, sales made through The Nasdaq Capital Market or on any other existing trading market for the ADSs. H.C. Wainwright will use commercially reasonable efforts to sell the ADSs from time to time, based upon instructions from the Company (including any price, time or size limits or other customary parameters or conditions the Company may impose). The Company will pay H.C. Wainwright a commission equal to three percent (3.0%) of the gross sales proceeds of any ADSs sold through H.C. Wainwright under the ATM Agreement, and also has provided H.C. Wainwright with customary indemnification and contribution rights.

The Company is not obligated to make any sales of ADSs under the ATM Agreement. The Company or H.C. Wainwright may suspend or terminate the offering of ADSs upon notice to the other party and subject to other conditions. H.C. Wainwright will act as the sales agent on a commercially reasonable efforts basis consistent with its normal trading and sales practices and applicable state and federal law, rules and regulations and the rules of the Nasdaq Stock Market.

The foregoing description of the ATM Agreement is not complete and is qualified in its entirety by reference to the full text of the ATM Agreement.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. No sales of securities are being made under the ATM in Switzerland.

About Addex Therapeutics

Addex Therapeutics https://www.globenewswire.com/Tracker?data=TCDDaCW2PNZmDHrGocVXZeA971ss1xcwsYch1vAczsibyBXfwi5qn3KsffLVEDSvifd8HimAMV0CAkaLPm_4SJBWczct5MCv3ZLj4Ek5vZVVq_ekdYujt_1A1iLBfI4S is a clinical-stage pharmaceutical company focused on the development and commercialization of an emerging class of novel orally available, small molecule drugs known as allosteric modulators for neurological disorders. Allosteric modulators offer several potential advantages over conventional, non-allosteric molecules and may offer an improved therapeutic approach to conventional "orthosteric" small molecule or biological drugs. Addex's allosteric modulator drug discovery platform targets receptors and other proteins that are recognized as essential for therapeutic intervention. Addex's lead drug candidate, ADX71149 (mGlu2 positive allosteric modulator or PAM), developed in collaboration with Janssen Pharmaceuticals, Inc., is in a Phase 2 clinical trial for the treatment of epilepsy. The company's second clinical program, dipraglurant (mGlu5 negative allosteric modulator or NAM), is under evaluation for future development in post-stroke recovery. Indivior PLC has licensed Addex's GABAB PAM program for the development of drug candidates, with a focus on substance use disorder. Addex is also advancing a broad preclinical pipeline, which includes development of a range of GABAB PAM for chronic cough, mGlu7 NAM for stress related disorders, M4 PAM for schizophrenia and other forms of psychosis and mGlu2 NAM for mild neurocognitive disorders and depression. Addex shares are listed on the SIX Swiss Exchange and American Depositary Shares representing its shares are listed on the NASDAQ Capital Market, and trade under the ticker symbol "ADXN" on each exchange.

Contacts:

Tim Dyer Mike Sinclair

Chief Executive Officer Partner, Halsin Partners

Telephone: +41 22 884 15 +44 7968 022075

55 msinclair@halsin.com

PR@addextherapeutics.com

Forward Looking Statements

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including statements about the intended use of proceeds of the offering. The words "may," "will," "could," "would," "should," "expect," "plan," "anticipate," "intend," "believe," "estimate," "predict," "project," "potential," "continue," "target" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Any forward-looking statements in this press release, are based on management's current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this press release, including, without limitation, uncertainties related to market conditions. These and other risks and uncertainties are described in greater detail in the section entitled "Risk Factors" in Addex Therapeutics' Annual Report on Form 20-F for the year ended December 31, 2022, as filed with the SEC on March 30, 2023, the final prospectus supplement and accompanying prospectus and other filings that Addex Therapeutics may make with the SEC in the future. Any forward-looking statements contained in this press release represent Addex Therapeutics' views only as of the date hereof and should not be relied upon as representing its views as of any subsequent date. Addex Therapeutics explicitly disclaims any obligation to update any forward-looking statements.

(END) Dow Jones Newswires

January 31, 2024 01:00 ET (06:00 GMT)