IAMGOLD Corporation Completes Acquisition of Mines D'Or Orbec Inc.

The most recent news release dated December 22, 2025, confirms that IAMGOLD Corporation (IAG) has completed the acquisition of all issued and outstanding common shares of Mines D'Or Orbec Inc. (Orbec). Orbec is now a wholly-owned subsidiary of IAMGOLD. Under the terms of the court-approved plan of arrangement, Orbec shareholders received C$0.0625 in cash and 0.003466 of an IAMGOLD common share for each Orbec share held, representing a total consideration of C$0.125 per share at the time of the initial agreement. Orbec shares are being delisted from the TSX Venture Exchange and the OTC Pink Limited Market.

The impact is definitively material and represents a terminal liquidity event for Orbec shareholders. - Positive: Shareholders realized an immediate exit at a 25% premium (at announcement) during a period when the company was facing a significant working capital deficiency (C$-212,926 as of Sept 30, 2025). - Strategic: IAMGOLD successfully consolidates the Muus Project, which sits adjacent to its Nelligan and Monster Lake deposits. - Financial: "In-the-money" options and warrants were settled for cash (difference between exercise price and C$0.125), providing value to security holders that might have otherwise expired worthless or faced heavy dilution. - Operational: Independent exploration at Muus ends; the project will now be absorbed into IAMGOLD’s larger regional development strategy.

Mines D'Or Orbec (formerly Blue Thunder Mining) was focused on the Muus Project in the Chibougamau region of Quebec. - Flagship: Muus Project (25,250 hectares). - Geology: Situated along the Guercheville Deformation Zone (GDZ), the same structure hosting IAMGOLD’s Nelligan deposit (indicated resource of 3.1M oz Au). - Development Stage: Early to mid-stage exploration. Summer 2025 drilling confirmed "Nelligan-style" mineralization with anomalous gold zones.