CHITOGENX INC — AGM Information 2024

Jun 6, 2024

June 6, 2024

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AMENDED

650 de Maisonneuve W Blvd, 7th floor Montreal QC, H3A 3T2 www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: CHITOGENX INC.

Dear Sir/Madam:

We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer: Meeting Type : Annual General Meeting Record Date for Notice of Meeting : June 13, 2024 Record Date for Voting (if applicable) : June 13, 2024 Beneficial Ownership Determination Date : June 13, 2024 Meeting Date : July 18, 2024 Meeting Location (if available) : Kirkland QC Issuer sending proxy related materials directly to NOBO: No Issuer paying for delivery to OBO: Yes

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders No NAA for Registered Holders No

Voting Security Details:

Description CUSIP Number ISIN CLASS A SHARES 169916103 CA1699161032

Sincerely,

Computershare

Agent for CHITOGENX INC.