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Notes to above Mineral Resources:

1. Certain definitions: The term “resource” means that it is a concentration or occurrence of material of economic interest in or on the Earth’s crust in such form, grade or quantity that there are reasonable prospects for economic extraction. Inferred, Indicated, and Measured resources are in order of increasing confidence based on level of underlying geological evidence. The term ‘inferred resource’ is that part of a mineral resource for which quantity and grade or quality are estimated on the basis of limited geological evidence and sampling. The term “limited geological evidence” means evidence that is only sufficient to establish that geological and grade or quality continuity is more likely than not. The level of geological uncertainty associated an inferred mineral resource is too high to apply relevant technical and economic factors likely to influence the prospects of economic extraction in a manner useful for evaluation of economic viability and must have a reasonable expectation that the majority of inferred mineral resources could be upgraded to indicated or measured mineral resources with continued exploration. In addition, no assurances can be given that any mineral resource estimate will ultimately be reclassified as proven or probable mineral reserves or that inferred resources will be upgraded to measured or indicated resources.
2. Assumed metal prices for 2025 estimated Mineral Resources were $30.00 per ounce of silver, $2,500 per ounce of gold, $3.50 per pound of copper, $1.30 per pound of zinc, $1.00 per pound of lead, unless otherwise noted.
3. Palmarejo Mineral Resource estimates use the following key input parameters: assumption of conventional longhole underground mining; reported above a variable gold equivalent cut-off grade that ranges from 0.93–1.62 g/tonne AuEq; metallurgical recovery assumption of 95.4% for gold and 87.1% for silver; variable mining costs that range from US$32.29–$43.08/tonne; surface haulage costs of US$4.40/tonne; process costs of US$30.02/tonne; general and administrative costs of US$14.17/tonne; and surface/auxiliary support costs of US$3.52/tonne. Excludes the impact of the Franco-Nevada gold stream agreement at Palmarejo in calculation of Mineral Resources.
4. Kensington Mineral Resource estimates use the following key input parameters: assumption of conventional longhole underground mining; reported above a variable gold cut-off grade of 0.108 oz/ton Au; metallurgical recovery assumption of 94.5%; gold payability of 97.5%; mining costs of US$127.32/ton mined; process costs of US$51.48/ton processed; general and administrative costs of US$49.74/ton processed; sustaining capital US$5.79/ton processed; and concentrate refining and shipping costs of US$104.73/oz sold.
5. Wharf Mineral Resource estimates use the following key input parameters: assumption of conventional open pit mining; reported above a NSR cut-off grade of $13.42/ton; average metallurgical recovery assumption of 78.0% across all rock types; royalty burden of US$112.00/oz Au; pit slope angles that vary from 34–50º; mining costs of $2.71/ton mined; process costs of US$13.42/ton processed (includes general & administrative and sustaining capital costs).
6. Rochester Mineral Resource estimates are tabulated within a confining pit shell and use the following input parameters: Rochester oxide variable recovery Au = 71.2–85.9% and Ag = 59.4% and Rochester sulfide variable recovery Au = 15.2–77.7% and Ag = 0.0–59.4%, with a net smelter return cut-off of $4.12/ton oxide and US$4.22/ton sulfide; Nevada Packard oxide recovery Au = 88.4% and Ag = 59.4%, with a net smelter return cut-off of $4.92/ton for oxide; Lincoln Hill oxide recovery Au = 61-63.9% and Ag = 18.5-39.5%, with a net smelter return cut-off of $5.02/ton for oxide, where the NSR is calculated as net smelter return (NSR) = silver grade (oz/ton) * silver recovery (%) * (silver price ($/oz) - refining cost ($/oz)) + gold grade (oz/ton) * gold recovery (%) * (gold price ($/oz) - refining cost ($/oz)); variable pit slope angles that approximately average 48º over the life-of-mine.
7. Silvertip Underground Mineral Resource estimates are reported using a net smelter return cut-off of US$130/tonne. Mineral Resources are reported insitu using the following assumptions: The estimates use the following key input parameters: lead recovery of 89-90%, zinc recovery of 82-83% and silver recovery of 83-84%. Lead concentrate grade of 53-54%; zinc concentrate grade of 56-57%; mining costs of US$68.77/tonne; processing costs of US$58.20/tonne and US$46.49/tonne, where the NSR ($/tonne) = tonnes x grade x metal prices x metallurgical recoveries – royalties – TCRCs – transport costs over the life of the mine.
8. Wilco Open Pit Mineral Resource estimates are reported using an equivalent gold cut-off of 0.20 ounces per ton assuming a silver to gold ratio of 60:1. Resources are reported in-situ and contained within a conceptual measured, indicated and inferred optimized pit shell. Silver price of US$22/oz, gold price of US$1,350/oz. Average oxide and sulfide gold recovery is 70%, average carbonaceous gold recovery is 50%. Average oxide and sulfide gold recovery is 60%. Average carbonaceous silver recovery is 50%. Open pit mining cost is US$1.50/ton, processing and G&A cost is US$5.46/ton; average pit slope angles of 50º.
9. Las Chispas Mineral Resource estimates uses the following key input parameters: assumption of conventional underground mining; reported above a silver equivalent cut-off grade (AgEq) of 140 g/tonne; metallurgical recovery assumption of 97.5% for silver and 98.0% for gold; mining loss of 2% for development and 5% for stoping was applied, additional losses have been included to account for the required pillars in uphole stopes that cannot be filled; variable production mining costs that range from US$58.06–US$239.51/tonne, development mining costs of US$27.40/tonne, process costs of US$45.72/tonne, site general and administrative costs of US$20.70/tonne, underground general and administrative costs of US$12.81/tonne, and sustaining capital costs of US$7.64/tonne.
10. New Afton Mineral Resource estimates uses the following key input parameters: The following copper-equivalency (CuEq%) formula is used: Cu% + (Au g/tonne * Au Recovery * Au Payable * (Au Price - Refining) / 31.1035) + (Ag g/tonne * Ag Recovery * Ag Payable * (Ag Price - Refining) / 31.1035) / (22.046 * Cu Recovery * Cu Payable * (Cu Price - Refining). The calculations are based on the following: Au price: US$2,500/oz Au; Au recovery: 87.7%; Au payable: 97.0%; Au refining charge: US$6.00/oz; Ag price: US$30/oz Au; Ag recovery: 73.5%; Ag payable: 90.0%; Ag refining charge: US$0.50/oz; Cu price: US$4.40/lb Cu; Cu recovery: 86.4%; Cu payable: 96.4%; Cu refining charge: US$0.8/lb.
11. Rainy River Mineral Resource estimates uses the following key input parameters: The estimate for the mineral resources considered potentially amenable to open pit mining methods uses the following key input parameters: assumption of conventional open pit mining; gold price of US$2,500/oz Au and silver price of US$30/oz Ag; gold selling cost of US$3.54/oz Au; reported above a gold equivalent cut-off grade of 0.20 g/tonne AuEq; variable metallurgical recoveries; royalty burden of 1.4%; variable pit slope angles by litho-structural domain; overburden mining cost of US$3.18/tonne mined, base mining cost at 300 m bench of US$4.38/tonne mined and incremental mining cost of US$0.025/tonne mined per 10 m bench; processing cost of US$10.40/tonne processed, and general and administrative costs of US$4.49/t processed.
12. Rounding of tonnes, grades, and ounces, as required by reporting guidelines, may result in apparent differences between tonnes, grades, and contained metal contents.