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| February 23, 2026 | 320 Bay Street, 14th Floor |
| Toronto ON M5H 4A6 | |
| www.computershare.com | |
| To: All Canadian Securities Regulatory Authorities |
Subject: IAMGOLD 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 General Meeting | ||
| Record Date for Notice of Meeting : | March 20, 2026 | ||
| Record Date for Voting (if applicable) : | March 20, 2026 | ||
| Beneficial Ownership Determination Date : | March 20, 2026 | ||
| Meeting Date : | May 05, 2026 | ||
| 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 | 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 | 450913108 | CA4509131088 | |
Sincerely,
Computershare
Agent for IAMGOLD CORPORATION