- U.S. GoldMining Inc. announced updated metallurgical test work results for its Whistler Gold-Copper Project, achieving a combined gold recovery of up to **85.3% Au**, **79.1% Cu**, and **55.3% Ag**.  **[1947244_0001493152-25-014390_ex99-1.htm:0]** 
- This represents a **22% improvement** in gold recovery compared to previous test work, which yielded approximately 70% gold recovery from sulphide flotation alone.  **[1947244_0001493152-25-014390_ex99-1.htm:0]** 
- The enhanced recovery is attributed to a new process flowsheet combining conventional flotation with a sequential leach process, providing key inputs for the ongoing preliminary economic assessment (PEA).  **[1947244_0001493152-25-014390_ex99-1.htm:0]**

U.S. GoldMining Inc. announces improved gold recovery rates for Whistler Gold-Copper Project

- U.S. GoldMining Inc. announced updated metallurgical test work results for its Whistler Gold-Copper Project, achieving a combined overall recovery of up to **85.3% gold (Au)**, **79.1% copper (Cu)**, and **55.3% silver (Ag)**.  **[1947244_20250922TO79711:0]** 
- This gold recovery marks a **22% increase** over previous test work, which only included sulphide flotation, by incorporating a sequential leach process.  **[1947244_20250922TO79711:0]** 
- The test work successfully produced a **copper concentrate grading 23.7% Cu**.  **[1947244_20250922TO79711:0]** 
- These results will provide key metallurgical recovery and process flowsheet inputs for the ongoing Preliminary Economic Assessment (PEA) of the project.  **[1947244_20250922TO79711:0]**

U.S. GoldMining (USGO)