i-80 Gold Corp.
For the period ended Sep 21, 2026. Filed Sep 22, 2026.
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Sep 21, 2026 · Filed Sep 22, 2026
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IAUX$1.42+4.4%Stored close · as of Nov 6, 2026
Contents
Endnotes
| (1) | A Preliminary Economic Assessment/Initial Assessment (“PEA”) on the Granite Creek Property was previously prepared by the Company in accordance with S-K 1300, filed in March 2025. The PFS focuses solely on feasibility-level technical work for Granite Creek Underground and does not update the previous work in the PEA in respect of the Granite Creek open pit, which remains subject to separate ongoing technical studies and permitting activities by the Company. |
| (2) | All reported mineral reserves for Granite Creek underground are fully attributable to the Company. All reported underground and open pit mineral resources are 100% attributable to the Company with the exception of a fee parcel and certain unpatented mining claims, which resources are 91.67% attributable to the Company. |
| (3) | The Mineral Reserve estimate is based on the Mineral Resource estimate depleted through March 31, 2026. The associated reserve mine plan therefore begins April 1, 2026. For purposes of the economic analysis, the reserve schedule was shifted one month such that the economic model begins May 1, 2026. This timing adjustment does not change the Mineral Reserve inventory, mine plan, or scheduled quantities, and does not result in double counting of production. |
| (4) | This is a non-GAAP measure. Please see the section titled “Non-GAAP Financial Performance Measures” below. |
| (5) | All-in sustaining costs presented exclude the allocation of Lone Tree Plant autoclave refurbishment capital. The Lone Tree autoclave capital allocation of $49.3M has been derived using a $25.97/tonne charge multiplied by the total tonnage processed at Lone Tree (1.90 million tonne). |
| (6) | Pending the successful completion of the refurbishment and commissioning of the Company’s Lone Tree autoclave and carbon-in-leach Plant. |
| (7) | Calculated based on a Base Case scenario of $2,750/oz; includes net profit interest (NPI) and refining. Royalties include a 10% NPI to Gold Royalty Corp. The illustrative NPI interests stated herein do not include the impacts of any future open pit projects on the Property, to which the NPI interest similarly applies. Payments made under the NPI are only made after recovery by the Company of all “recoverable costs” as further described under Chapter 3 of the PFS. |
| (8) | These historical drill results were generated by Homestake Mining Company in 1997 and Pinson Mining Company in 1995 and were not generated by i-80 Gold. The results have been reviewed by Tyler Hill, VP Geology for the Company. No QA/QC data is available for these results, however these holes were found to be acceptable for use in the 2026 Granite Creek open pit resource estimate as conducted by Global Resource Engineering (GRE). |
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