Mountain Province Diamonds Inc. — Proxy Solicitation & Information Statement 2022

Jan 24, 2022

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Date: January 24, 2022

100 University Avenue, 8th floor Toronto ON, M5J 2Y1 www.computershare.com

To: All Canadian Securities Regulatory Authorities

AMENDED

Subject: MOUNTAIN PROVINCE DIAMONDS INC.

Dear Sir/Madam:

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 : January 21, 2022 Record Date for Voting (if applicable) : January 21, 2022 Beneficial Ownership Determination Date : January 21, 2022 Meeting Date : February 28, 2022 - Amended Meeting Location (if available) : Virtual Meeting 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 SHARES 62426E402 CA62426E4022

Sincerely,

Computershare

Agent for MOUNTAIN PROVINCE DIAMONDS INC.