Tombill Mines Limited — Proxy Solicitation & Information Statement 2026

Apr 1, 2026

April 01, 2026

Computershare

510 Burrard Street, 3rd Floor

Vancouver BC, V6C 3B9

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: TOMBILL MINES LIMITED

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 14, 2026
Record Date for Voting (if applicable) : April 14, 2026
Beneficial Ownership Determination Date : April 14, 2026
Meeting Date : May 20, 2026
Meeting Location (if available) : Toronto, ON
Issuer sending proxy related materials directly to NOBO: No
Issuer paying for delivery to OBO: No

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders No
NAA for Registered Holders No

Voting Security Details:

Description	CUSIP Number	ISIN
COMMON	88986P107	CA88986P1071

Sincerely,

Computershare

Agent for TOMBILL MINES LIMITED