Radisson Mining Resources Inc. — Proxy Solicitation & Information Statement 2026

Apr 2, 2026

April 02, 2026

Computershare

650 boulevard De Maisonneuve ouest,

7e étage

Montreal (Québec), H3A 3T2

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: RADISSON MINING RESOURCES 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 29, 2026

Record Date for Voting (if applicable) : April 29, 2026

Beneficial Ownership Determination Date : April 29, 2026

Meeting Date : June 11, 2026

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 : Yes

Beneficial Holders Stratification Criteria: Not Applicable

NAA for Registered Holders : Yes

Registered Holders Stratification Criteria: Not Applicable

Voting Security Details:

Description	CUSIP Number	ISIN
CLASS A COMMON SHARES	76125W505	CA76125W5054

Sincerely,

Computershare

Agent for RADISSON MINING RESOURCES INC.