# EDGAR Filing Document

**Accession Number:** 0001574232
**File Stem:** 0001104659-26-034491
**Filing Date:** 2026-3
**Character Count:** 8598
**Document Hash:** 6755461582c43cae704f5c28bf80ab84
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-034491.hdr.sgml**: 20260325

**ACCESSION NUMBER**: 0001104659-26-034491

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260325

**DATE AS OF CHANGE**: 20260325

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Hill Raymond George
- **CENTRAL INDEX KEY:** 0002123864

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39179
- **FILM NUMBER:** 26792357

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** CHEMIN DES MINES 9
- **CITY:** GENEVA
- **PROVINCE COUNTRY:** V8
- **ZIP:** CH-1202
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Addex Therapeutics Ltd.
- **CENTRAL INDEX KEY:** 0001574232
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** V8
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** CHEMIN DES MINES 9
- **CITY:** GENEVA
- **STATE:** V8
- **ZIP:** CH-1202
- **BUSINESS PHONE:** 01141228841555

**MAIL ADDRESS:**
- **STREET 1:** CHEMIN DES MINES 9
- **CITY:** GENEVA
- **STATE:** V8
- **ZIP:** CH-1202

## Ex-24

**Exhibit 24**

**<u>LIMITED POWER OF ATTORNEY</u>**

Know all by these presents, that the undersigned hereby makes, constitutes and appoints Timothy Mark Dyer and Lenaïc Nathanael Teyssedou, and each of them singly, as the undersigned's true and lawful attorneys-in-fact with full power and authority as hereinafter described to:

&nbsp;&nbsp;&nbsp;&nbsp;1. execute for and on behalf of the undersigned, (i) Forms 3, 4, and 5 (including amendments thereto)
in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and the
rules thereunder, (ii) Form 144 in accordance with Rule 144 under the Securities Act of 1933, as amended (the "Securities
Act"), and (iii) Schedules 13D and 13G (including amendments thereto) in accordance with Sections 13(d) and 13(g) of
the Exchange Act and the rules thereunder;

&nbsp;&nbsp;&nbsp;&nbsp;2. do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable
to complete and execute any such Form 3, 4, or 5 (including amendments thereto), Form 144, or Schedule 13D or 13G (including
amendments thereto) and timely file such form with the United States Securities and Exchange Commission (the "SEC") and any
stock exchange or similar authority, including, but not limited to, executing a Form ID or Update Passphrase request for and on behalf
of the undersigned and filing such applications with the SEC; and

&nbsp;&nbsp;&nbsp;&nbsp;3. take any other action of any type whatsoever in connection with the foregoing which, in the opinion of
such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that
the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Limited Power of Attorney shall be in such
form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all the acts such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this Limited Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that each of the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, is not assuming any of the undersigned's responsibilities to comply with Sections 13 or 16 of the Exchange Act or Rule 144 under the Securities Act.

This Limited Power of Attorney is perpetual unless revoked by the undersigned in a signed writing delivered to each of the foregoing attorneys-in-fact. In addition, at such time as any attorney-in-fact resigns as attorney-in-fact by the execution of a written resignation delivered to the undersigned, without any action on the part of the undersigned, this Limited Power of Attorney shall be partially revoked solely with respect to such individual; such individual shall cease to be an attorney-in-fact under this Limited Power of Attorney; and the authority of the other attorneys-in-fact then existing hereunder shall remain in full force and effect.

*[Signature page follows]*

IN WITNESS WHEREOF, the undersigned has caused this Limited Power of Attorney to be executed as of this 16<sup>th</sup> day of March, 2026.

---

| |
|:---|
| /s/ Raymond G. Hill |
| Raymond G. Hill |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Hill Raymond George<br><sub>(Last) (First) (Middle)</sub><br>CHEMIN DES MINES 9<br><sub>(Street)</sub><br>GENEVA, SWITZERLAND CH-1202<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Addex Therapeutics Ltd. [ ADXN ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common stock | 1365532<sup>(1)</sup> | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Stock-Option (Right to Buy) | 2024-01-08<sup>(2)</sup> | 2034-01-07 | Common Stock | 273107 | 0.064<sup>(3)</sup> | D |  |

---

### Footnotes:

(1) Represents 1,365,532 shares of Common Stock listed on SIX Swiss Exchange.

(2) The stock-options vest on equal monthly installments over a 4-year period beginning at the exercisable date. Each stock-option grants to right to purchase one ADXN share listed on SIX Swiss Exchange.

(3) The exercise price is reported in U.S. dollars and reflects the conversion from CHF to USD at an exchange rate of $1.2769 per CHF 1.00 as of March 12, 2026.

**Remarks:**
Exhibit List: Exhibit 24 - Power of Attorney

**Signature:** /s/ Lenaic Nathanael Teyssedou by power of attorney  
**Date:** 2026-03-18

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**