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Resources & Reserves

Gold Resources

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Resources
 MEASURED INDICATED MEASURED + INDICATED INFERRED
Au
Resources		 Tonnes (000s) Au Grade (g/t) Contained Au (oz) Tonnes (000s) Au Grade (g/t) Contained Au (oz) Tonnes (000s) Au Grade (g/t) Contained Au (oz) Tonnes (000s) Au Grade (g/t) Contained Au (oz)
Ontario, Canada
Fox Complex		                        
Froome Mine 212 2.45 17,000 440 2.94 42,000 651 2.78 58,000 302 2.93 28,000
Grey Fox - - - 19,474 3.02 1,892,000 19,474 3.02 1,892,000 5,101 2.66 436,000
Stock West & Main - - - 3,179 2.63 268,000 3,179 2.63 268,000 2,468 2.31 184,000
Fuller - - - 1,552 3.86 193,000 1,552 3.86 193,000 970 2.93 91,000
Stock East - - - 1,790 2.12 122,000 1,790 2.12 122,000 1,350 2.02 87,000
Black Fox 244 3.59 28,000 141 3.54 16,000 385 3.57 44,000 385 2.90 36,000
Davidson Tisdale 223 6.87 49,000 69 6.70 15,000 292 6.83 64,000 133 4.01 17,000
Total Ontario 679 4.31 94,000 26,645 2.79 2,548,000 27,323 3.01 2,641,000 10,709 2.55 879,000
Manitoba, Canada                        
Tartan Mine - - - 2,619 3.67 308,900 2,619 3.67 308,900 2,833 3.32 302,700
United States
Gold Bar Mine Complex		                        
Gold Bar Mine - - - 9,630 0.52 162,000 9,630 0.52 162,000 1,368 0.43 19,000
Lookout Mtn - - - 19,570 0.64 402,000 19,570 0.64 402,000 7,292 0.57 134,000
Mexico                        
Fenix Project 9,000 0.51 148,000 5,700 0.27 50,000 14,700 0.42 199,000 300 0.41 4,000
Argentina                        
San José
(MSC, 49% attributable)		 270 2.93 25,500 203 1.93 13,000 473 2.50 38,000 1,306 3.81 160,000
Los Azules
(McEwen Copper
46.3% attributable)		 4,739 0.06 9,000 325,629 0.05 474,000 330,369 0.05 482,000 1,962,800 0.04 2,659,000
TOTAL GOLD RESOURCES     276,500     3,957,900     4,232,900     4,158,700

Silver Resources

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MEASURED INDICATED MEASURED + INDICATED INFERRED
Ag Resources  Tonnes (000s) Ag Grade
(g/t)		 Contained Ag (000s oz) Tonnes (000s) Ag Grade
(g/t)		 Contained Ag (000s oz) Tonnes (000s) Ag Grade
(g/t)		 Contained Ag (000s oz) Tonnes (000s) Ag Grade
(g/t)		 Contained Ag (000s oz)
Mexico                        
Fenix Project 9,000 19 5,600 5,700 79 14,500 14,700 42 20,100 300 33 300
Argentina                        
San José
(MSC, 49% attributable)		 270 202 1,800 203 126 800 473 169 2,600 1,306 222 9,300
Los Azules
(McEwen Copper
46.3% attributable)		 4,739 1.81 0 325,629 1.15 12,000 330,369 0.86 12,300 1,962,000 1.10 69,400
TOTAL SILVER RESOURCES     7,600     27,400     35,000     79,000

Copper Resources

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 MEASURED INDICATED MEASURED + INDICATED INFERRED
Cu
Resources		 Tonnes (Billion) Cu Grade
(%)		 Contained Cu
(Billion lbs)		 Tonnes (Billion) Cu Grade
(%)		 Contained Cu
(Billion lbs)		 Tonnes (Billion) Cu Grade
(%)		 Contained Cu
(Billion lbs)		 Tonnes (Billion) Cu Grade
(%)		 Contained Cu
(Billion lbs)
Argentina                        
Los Azules
(McEwen Copper
46.3% attributable)		 6.4 0.16 0.02 0.4 0.26 2.5 0.4 0.26 2.5 2.0 0.21 9.2

Gold Reserves

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empty header
 Proven Probable Proven + Probable
Au
Reserves		 Tonnes
(000s)		 Au Grade
(g/t)		 Contained Au
(oz)		 Tonnes
(000s)		 Au Grade
(g/t)		 Contained Au
(oz)		 Tonnes
(000s)		 Au Grade
(g/t)		 Contained Au
(oz)
United States                  
Gold Bar Mine - - - 8,624 0.61 168,000 8,624 0.61 168,000
Argentina                  
San José Mine (49% attributable) 494 3.72 59,100 358 3.69 42,500 852 3.71 101,600
TOTAL
     59,100     210,500     269,600

Silver Reserves

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empty heading
 Proven Probable Proven + Probable
Ag
Reserves 		 Tonnes
(000s)		 Ag Grade
(g/t)		 Contained Ag
(000s oz)		 Tonnes
(000s)		 Ag Grade
(g/t)		 Contained Ag
(000s oz)		 Tonnes
(000s)		 Ag Grade
(g/t)		 Contained Ag
(000s oz)
Argentina                  
San José Mine (49% attributable) 494 199 3,200 358 175 2,000 852 189 5,200
Total
     3,200

2,000

5,200

Copper Reserves

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empty heading
 Proven Probable Proven + Probable
Cu
Reserves 		 Tonnes
(Billion)		 Cu Grade
(%)		 Contained Cu
(Billion lbs)		 Tonnes
(Billion)		 Cu Grade
(%)		 Contained Cu
(Billion lbs)		 Tonnes
(Billion)		 Cu Grade
(%)		 Contained Cu
(Billion lbs)
Argentina                  
Los Azules (46.3% attributable) 106 0.68 1.6 368 0.39 3.1 474 0.45 4.7
Total
     1.6

3.1

4.7

Notes to the 2025 Mineral Reserves and Resource Tables

Resources presented here are exclusive of Reserves.

Resources and Reserves have been prepared in accordance with the Regulation S-K 1300 requirements of the SEC, according to McEwen's Resources and Reserves from December 31, 2025 (for details please see the 2025 10-K Report). Resource estimates were further updated "McEwen Reports Tartan Mine Project Gold Mineral Resource Estimate" on March 23, 2026 .

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