Based on the currently forecasted capital spending profile at the C(tT Gold Project and revised joint venture interests, it is expected that this will result in Sumitomo contributing an additional $90 million of construction cost funding to the project in 2023 (the "Incremental Contributions by SMM"). Upon commencement of production, each of IAMGOLD and Sumitomo will fund joint venture expenditures and receive gold in proportion to their revised joint venture interests. In connection with the Repurchase Option, IAMGOLD will pay Sumitomo a repurchase option fee ("Repurchase Option Fee") equal to 3 Month SOFR plus 4.00% on the amounts advanced during construction and up to achieving commercial production. This Repurchase Option Fee will be payable in cash quarterly from January 1, 2024. The amount of the fee accrued until January 1, 2024 will be payable upon the earlier of IAMGOLD's repurchase of the Transferred Interests, or November 30, 2026.