Mountain Province Diamonds Inc. — Proxy Solicitation & Information Statement 2025

Mar 24, 2025

March 24, 2025

Computershare

100 University Avenue, 8th floor

Toronto ON, M5J 2Y1

www.computershare.com

To: All Canadian Securities Regulatory Authorities

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 : Annual General and Special Meeting
Record Date for Notice of Meeting : April 10, 2025
Record Date for Voting (if applicable) : April 10, 2025
Beneficial Ownership Determination Date : April 10, 2025
Meeting Date : May 16, 2025
Meeting Location (if available) : Virtual Meeting
Issuer sending proxy related materials directly to NOBO: Yes
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.