• Exploration Alliance & JV with Fortuna Mining Corp in the Siguiri Basin, Guinea
• Maiden reconnaissance RC drilling completed at Dadjan and Tolé with high-grade intercepts
• Regional pipeline advanced across Koba, Nérékoró Sud, Mini and Kassa Est

DeSoto Resources Limited (ASX:DES) has reported its Quarterly Activities Report for the period 1 October 2025 to 31 December 2025. Key highlights include the execution of a binding Heads of Agreement with Fortuna Mining Corp to establish an exploration alliance and joint venture over a defined Area of Interest in the Siguiri Basin, Guinea. Fortuna will sole-fund up to US$12.5M over three years to earn 70%, with DeSoto retaining 30%. DeSoto also completed maiden reconnaissance RC drilling at Dadjan and Tolé, with high-grade intercepts reported. The Company continued to advance its regional pipeline, commencing or progressing first-pass programs across Koba, Nérékoró Sud, Mini and Kassa Est. Systematic coverage was also underway at Timbakouna. Corporately, DeSoto announced a A$14M placement, including a A$5M cornerstone investment. The Company held cash of A$12.7M at 31 December 2025.