<SEC-DOCUMENT>0001104659-26-030243.txt : 20260318
<SEC-HEADER>0001104659-26-030243.hdr.sgml : 20260318
<ACCEPTANCE-DATETIME>20260318110706
ACCESSION NUMBER:		0001104659-26-030243
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20260318
FILED AS OF DATE:		20260318
DATE AS OF CHANGE:		20260318

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Dyer Timothy Mark
		CENTRAL INDEX KEY:			0001830908
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39179
		FILM NUMBER:		26766813

	MAIL ADDRESS:	
		STREET 1:		CHEMIN DES MINES 9
		STREET 2:		CH-1202
		CITY:			GENEVA
		STATE:			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
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>tm268906-3_3seq1.xml
<DESCRIPTION>OWNERSHIP DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0607</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2026-03-18</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001574232</issuerCik>
        <issuerName>Addex Therapeutics Ltd.</issuerName>
        <issuerTradingSymbol>ADXN</issuerTradingSymbol>
        <issuerForeignTradingSymbol>ADXN</issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001830908</rptOwnerCik>
            <rptOwnerName>Dyer Timothy Mark</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>CHEMIN DES MINES 9</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GENEVA</rptOwnerCity>
            <rptOwnerState></rptOwnerState>
            <rptOwnerZipCode>CH-1202</rptOwnerZipCode>
            <rptOwnerStateDescription>SWITZERLAND</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Executive Officer</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16848979</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock-Option (Right to Buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.064</value>
                <footnoteId id="F3"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2024-01-08</value>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <value>2034-01-07</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3369796</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Represents 16,848,979 shares of Common Stock listed on SIX Swiss Exchange.</footnote>
        <footnote id="F2">The stock-options vest on equal monthly installments over a 4-year period beginning at the exercisable date. Each stock-option grants the right to purchase one ADXN share listed on SIX Swiss Exchange.</footnote>
        <footnote id="F3">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.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Timothy Mark Dyer</signatureName>
        <signatureDate>2026-03-18</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
