SEC FORM 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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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 ^*

Kalinichev Mikhail

(Last)

(First)

(Middle)

CHEMIN DES MINES 9

(Street)

GENEVA

CH-1202

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Addex Therapeutics Ltd. [ ADXN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
HEAD OF TRANSLATIONAL SCIENCE

3. Date of Earliest Transaction (Month/Day/Year)
09/02/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	09/02/2026		D⁽¹⁾		306,765	D	$ 0 ⁽¹⁾	0	D
Common Stock	09/02/2026		A⁽¹⁾		306,765	A	$ 0 ⁽¹⁾	306,765	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock-option (Right to Buy)	$ 0.062 ⁽³⁾	09/02/2026		D⁽²⁾			200,000	01/08/2024	01/07/2034	Common Stock	200,000	$ 0	0	D
Stock-option (Right to Buy)	$ 0.032 ⁽³⁾	09/02/2026		A⁽²⁾		200,000		01/08/2024	01/07/2034	Common Stock	200,000	$ 0	200,000	D

Explanation of Responses:

1. Represents 306,765 shares of common Stock listed on SIX Swiss Exchange acquired following the exercise of options. Of these shares, 179,171 were acquired on October 26, 2022 under the deferred strike price payment plan with an initial strike price of $0.16 per share and 127,594 were acquired on November 27, 2023 with an initial strike price of $0.053 per share. On September 2, 2026, following the implementation of the Remuneration Committee's decision, the Strike price of all units was reduced to $0.032. All the other terms of the deferred strike price payment plan remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the exchange act as applicable. The strike prices indicated in this section reflect the conversion from CHF to USD at an exchange rate of $ 1.2296 per CHF 1.00 as of September 2, 2026.

2. On September 2, 2026, following the implementation of the Remuneration Committee's decision, the exercise price of the options were repriced to $0.032. All of the other terms of the options remain unchanged. Such transactions were exempt pursuant to Rule 16b-6(d) and Rule 16b-3 of the exchange act as applicable.

3. The exercise price is reported in U.S. dollars and reflects the conversion from CHF to USD at an exchange rate of $1.2296 per CHF 1.00 as of September 2, 2026.

	/s/ Lenaic Nathanael Teyssedou by power of attorney	09/04/2026
	** Signature of Reporting Person	Date
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