La Parrilla DEVELOPMENT Durango, Mexico OPERATOR Silver Storm Mining Ltd. ("Silver Storm") COMMODITY TYPE TERMS LAND AREA Gold, Silver, Royalty 2.0% NSR 38,128 ha Lead, Zinc Royalty Summary Reserves La Parrilla is an underground mine complex owned by Silver Storm Reserves & Resources - Au consisting of multiple inter-connected mines within a ~38,128-ha P&P Reserves (koz Au) - land package. The property has known mineralization throughout, M&I Resources (koz Au) 2 with a complex of 昀椀ve past-producing underground mines sur- Inferred Resources (koz Au) 5 rounding the mill including Los Rosarios, La Rosa, San Jose, Que- Reserves & Resources - Ag bradillas and San Marcos. P&P Reserves (koz Ag) - M&I Resources (koz Ag) 3,484 Full production from the mine for 2018 totaled 2.3 Moz AgEq mean- Inferred Resources (koz Ag) 7,728 while 2017 production totaled 2.5 Moz AgEq. The mine was placed Metalla Royalty Ounces - GEOs on care and maintenance in 2019 to complete exploration and de- P&P Reserves (koz) - velopment work. The mine has a 2,000 tpd processing plant and all M&I Resources (koz) 1.4 associated infrastructure. Upon completion of the acquisition of the Inferred Resources (koz) 2.7 mine from First Majestic Silver, Silver Storm announced a 7,000 * For royalty ounce calculation, Metalla estimates that 100% of the La Parrilla Mineral Resources and Mineral Reserves are subject to our royalty at a rate of 2%. Silver has been converted to Royalty meter drill program and a target date of Q4 2024 for techncial stud- GEOs assuming $23/oz. * For sources, please refer to note 14 on the Notes & Sources page. ies and a mine restart plan. Silver Storm outlined mid-2025 as a target to restart mining at La Parrilla. Recent highlights from drilling at La Parrilla include 500 g/t AgEq over 14.8 meters, 1,810 g/t AgEq over 14.6 meters and 1,000 g/t AgEq over 5.25 meters. Royalty & Mineralization Map Mineralization Royalty Boundary Property Boundary 28 Metalla Royalty & Streaming Ltd.