We advise of the following with respect to the upcoming Meeting of Security Holders for the subject Issuer:

Meeting Type : Special Meeting
Record Date for Notice of Meeting : September 22, 2023
Record Date for Voting (if applicable) : September 22, 2023
Beneficial Ownership Determination Date : September 22, 2023
Meeting Date : November 1, 2023
Meeting Location (if available) : Hybrid
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
COMMON CLASS 731916409 CA7319164090

Sincerely,

Computershare

Agent for POLYMET MINING CORP.

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PolyMet Mining Corporation published this content on 12 September 2023 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 13 September 2023 10:18:05 UTC.