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Whole-project rollup at the latest vintage per category: printed project-level rows are preferred, and mining areas are summed (tonnes-weighted grade) only where the issuer prints no project-level row. Per-area and per-source detail in the Current R&R table below.
| Category | Tonnes (Mt) | Grade (g/t Au) | Contained (Moz Au) | As at |
|---|---|---|---|---|
| Measured | — | — | — | — |
| Indicated | 25.62 Mt | 0.20 g/t | 0.16 Moz | 31 Dec 2025 |
| M&I = Measured + Indicated (overlaps both) | 22.88 Mt | 0.23 g/t | 0.17 Moz | 31 Dec 2024 |
| Inferred | 31.51 Mt | 0.20 g/t | 0.20 Moz | 31 Dec 2025 |
| Total Resources | 57.13 Mt | 0.20 g/t | 0.36 Moz | 31 Dec 2025 |
| Proved | — | — | — | — |
| Probable | 62.79 Mt | 0.23 g/t | 0.46 Moz | 31 Dec 2025 |
| Total Reserves | 50.75 Mt | 0.27 g/t | 0.43 Moz | 31 Dec 2024 |
M&I is the issuer's printed Measured + Indicated subtotal — it overlaps the Measured and Indicated rows and is never added alongside them; the Total rows and every rollup already exclude it.
Sub-category rows are as disclosed (no Reserves-treatment netting); the Total rows honour the Resources treatment and Inferred-policy toggles, so components may not sum to the Total.
| Category | Tonnes (Mt) | Grade (g/t Ag) | Contained (Moz Ag) | As at |
|---|---|---|---|---|
| Measured | — | — | — | — |
| Indicated | 25.62 Mt | 9.84 g/t | 8.11 Moz | 31 Dec 2025 |
| M&I = Measured + Indicated (overlaps both) | 22.88 Mt | 11.36 g/t | 8.36 Moz | 31 Dec 2024 |
| Inferred | 31.51 Mt | 8.99 g/t | 9.11 Moz | 31 Dec 2025 |
| Total Resources | 57.13 Mt |
Percentile of this project's current total Resource among covered peers (P100 = largest / highest grade). Basis and Inferred toggles apply.
| Category | Tonnes (Mt) | Au | Ag | As at | Source | Provenance | ||
|---|---|---|---|---|---|---|---|---|
| Grade (g/t Au) | Contained (Moz Au) | Grade (g/t Ag) | Contained (Moz Ag) | |||||
| Indicated | 25.62 Mt | 0.20 g/t | 0.16 Moz | 9.84 g/t | 8.11 Moz | 31 Dec 2025 | 62, Coimolache – Year End Mineral Resources as of December 31, 2025Unverified | |
| 17.21 Moz |
| 31 Dec 2025 |
| Proved | — | — | — | — |
| Probable | 62.79 Mt | 10.66 g/t | 21.51 Moz | 31 Dec 2025 |
| Total Reserves | 50.75 Mt | 10.93 g/t | 17.84 Moz | 31 Dec 2024 |
M&I is the issuer's printed Measured + Indicated subtotal — it overlaps the Measured and Indicated rows and is never added alongside them; the Total rows and every rollup already exclude it.
Sub-category rows are as disclosed (no Reserves-treatment netting); the Total rows honour the Resources treatment and Inferred-policy toggles, so components may not sum to the Total.
notes (2)Ref: 62, Coimolache – Year End Mineral Resources as of December 31, 2025
|
| M&I = Measured + Indicated (overlaps both) | 22.88 Mt | 0.23 g/t | 0.17 Moz | 11.36 g/t | 8.36 Moz | 31 Dec 2024 | Coimolache – Year End Mineral Resources as of December 31, 2024 (on a 100% Buenaventura ownership basis)Unverified | notes (4)Ref: Coimolache – Year End Mineral Resources as of December 31, 2024 (on a 100% Buenaventura ownership basis)
QA notes:
|
| Inferred | 31.51 Mt | 0.20 g/t | 0.20 Moz | 8.99 g/t | 9.11 Moz | 31 Dec 2025 | 62, Coimolache – Year End Mineral Resources as of December 31, 2025Unverified | notes (2)Ref: 62, Coimolache – Year End Mineral Resources as of December 31, 2025
|
| Total Resources | 57.13 Mt | 0.20 g/t | 0.36 Moz | 9.37 g/t | 17.21 Moz | 31 Dec 2025 | derived from 2 rows | — |
| Category | Tonnes (Mt) | Au | Ag | As at | Source | Provenance | ||
|---|---|---|---|---|---|---|---|---|
| Grade (g/t Au) | Contained (Moz Au) | Grade (g/t Ag) | Contained (Moz Ag) | |||||
| Probable | 62.79 Mt | 0.23 g/t | 0.46 Moz | 10.66 g/t | 21.51 Moz | 31 Dec 2025 | 60, Coimolache – Year End Mineral Reserves as of December 31, 2025Unverified | notes (1)Ref: 60, Coimolache – Year End Mineral Reserves as of December 31, 2025
|
| Total Reserves | 50.75 Mt | 0.27 g/t | 0.43 Moz | 10.93 g/t | 17.84 Moz | 31 Dec 2024 | Coimolache – Year End Mineral Reserves as of December 31, 2024 (on a 100% ownership basis)Unverified | notes (4)Source: 20-F: 20-F |
Rows are hierarchical, not additive — do not sum a column across rows. “M&I” is the issuer's printed Measured + Indicated subtotal: it overlaps the Measured and Indicated rows and is never added alongside them. All derived totals and rollups on this site already exclude the overlapping rows.
Figures are on a 100% project basis unless a row carries the attrib chip; BUENAVENTURA MINING CO INC holds 40.1% of this project.