Orezone Gold Corporation — Proxy Solicitation & Information Statement 2026

Apr 10, 2026

April 10, 2026

Computershare

650 boulevard De Maisonneuve ouest,

7e étage

Montreal (Québec), H3A 3T2

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: OREZONE GOLD CORPORATION

Dear Sir/Madam:

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

Meeting Type : Annual Meeting
Record Date for Notice of Meeting : May 05, 2026
Record Date for Voting (if applicable) : May 05, 2026
Beneficial Ownership Determination Date : May 05, 2026
Meeting Date : June 25, 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
COMMON SHARES	68616T109	CA68616T1093
RESTRICTED COMMON REGULATION D	68616T125	US68616T1253

Sincerely,

Computershare

Agent for OREZONE GOLD CORPORATION