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Reporting assumptions

These choices persist and are added to shared URLs.

Ownership basis

Show the full project inventory before ownership adjustment.

Display scale

Display contained quantities in millions of ounces or tonnes.

Resource treatment

Normalise Resources to exclude Reserves: where a project is flagged inclusive, net Reserves out of Resources so the figure is additional Resources beyond Reserves. Unknown-convention rows are shown as stated.

Resource total

Total Resource includes Inferred (JORC convention). Totals are re-derived from category rows wherever the document discloses them.

Recovery basis

Show the issuer's headline recoverable figure as reported. Lithium-brine reserves already have the brine-processing recovery factor applied; everything else is shown as stated.

Commodity view

Primary view: each commodity in its own contained unit (oz / t).

Round Mountain

Nevada, United States · Producing · 100.0% ownedUnverified

Current R&R by category

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.

Au

Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	As at
Measured	—	—	—	—
Indicated	81.28 Mt	0.60 g/t	1.45 Moz	31 Dec 2025
Inferred	61.27 Mt	1.00 g/t	1.96 Moz	31 Dec 2025
Total Resources	142.54 Mt	0.77 g/t	3.41 Moz	31 Dec 2025
Proved	5.37 Mt	0.30 g/t	0.06 Moz	31 Dec 2025
Probable	39.69 Mt	1.40 g/t	1.83 Moz	31 Dec 2025
Total Reserves	45.06 Mt	1.30 g/t	1.89 Moz	31 Dec 2025

Ag

Category	Tonnes (Mt)	Grade (g/t Ag)	Contained (Moz Ag)	As at
Measured	—	—	—	—
Indicated	—	—	—	—
Inferred	36.65 Mt	6.90 g/t	8.12 Moz	31 Dec 2025
Total Resources	36.65 Mt	6.90 g/t	8.12 Moz	31 Dec 2025
Proved	—	—	—	—
Probable	—

Cut-off grade

0.1700 g/t Au

Price assumption

US$2500.00/oz · US$29.41/oz · US$2000.00/oz

JORC code year

—

Peer benchmark — producing Au projects (282 with resources)Resource size P65Resource grade P28View on grade-tonnage chart →

Percentile of this project's current total Resource among covered peers (P100 = largest / highest grade). Basis and Inferred toggles apply.

Data quality

Latest source: 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit) · 31 Dec 2025
Reporting code: SK-1300
Convention: exclusive
Currency assumption: US$
Disagreement flags: 3 rows

Current R&R

Resources

Category	Tonnes (Mt)	Au		Ag		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	As at	Source	Provenance
Indicated	81.28 Mt	0.60 g/t	1.45 Moz	—	—	31 Dec 2025	MEASURED AND INDICATED MINERAL RESOURCES — GOLDUnverified Evidence record Round Mountain Indicated · Au · as at 2025-12-31 Reported figure Area Whole project Basis attributable Ore tonnes (t) 81275000.0000 Grade 0.6000 Contained (oz) 1446000.0000 Classification Resource Source trail 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit) MEASURED AND INDICATED MINERAL RESOURCES — GOLD Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA INFO: recompute differs 8.43% from the printed contained figure, but the print is exactly consistent with the recompute at the printed tonnes/grade/contained granularity (rounding-interval overlap) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.

Reserves

Category	Tonnes (Mt)	Au		Ag		As at	Source	Provenance
Category	Tonnes (Mt)	Grade (g/t Au)	Contained (Moz Au)	Grade (g/t Ag)	Contained (Moz Ag)	As at	Source	Provenance
Proved	5.37 Mt	0.30 g/t	0.06 Moz	—	—	31 Dec 2025	PROVEN AND PROBABLE MINERAL RESERVES — GOLDUnverified Evidence record Round Mountain Proved · Au · as at 2025-12-31 Reported figure Area Whole project Basis attributable Ore tonnes (t) 5365000.0000 Grade 0.3000 Contained (oz) 59000.0000 Classification Reserve Source trail 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit) PROVEN AND PROBABLE MINERAL RESERVES — GOLD Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. QA BLOCK: recomputed contained 51746.6266 oz vs reported 59000 oz (12.29% disagreement) Rounding-interval overlap exists at the printed granularity, but a 12.29% gap exceeds the 10% interval-waiver ceiling (t23 STM AuEq-miscopy precedent) — verify the printed contained figure before approval. Copies a pre-filled issue record so you can send it through your normal channel.	notes (5) Source: 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit) · published 26 Mar 2026 Ref: PROVEN AND PROBABLE MINERAL RESERVES — GOLD SK-1300 — Reporting code of record: SK-1300 Cutoff 0.17 g/t Au — Cut-off grade assumption from the source statement. @ US$ 2,000/oz — Metal price assumption used to derive this estimate. attrib — Figures are net to the issuer's ownership interest as reported (attributable basis) — NOT 100% of the project. QA notes: QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. QA BLOCK: recomputed contained 51746.6266 oz vs reported 59000 oz (12.29% disagreement) Rounding-interval overlap exists at the printed granularity, but a 12.29% gap exceeds the 10% interval-waiver ceiling (t23 STM AuEq-miscopy precedent) — verify the printed contained figure before approval.
Probable	39.69 Mt	1.40 g/t	1.83 Moz	—	—	31 Dec 2025	PROVEN AND PROBABLE MINERAL RESERVES — GOLDUnverified Evidence record Round Mountain Probable · Au · as at 2025-12-31 Reported figure Area Whole project Basis attributable Ore tonnes (t) 39690000.0000 Grade 1.4000 Contained (oz) 1829000.0000 Classification Reserve Source trail 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit) PROVEN AND PROBABLE MINERAL RESERVES — GOLD Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. QA INFO: recompute differs 2.32% from the printed contained figure, but the printed tonnes/grade/contained are only good to ±3.61% (rounding granularity) — treated as reconciled. Copies a pre-filled issue record so you can send it through your normal channel.	notes (5) Source: 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit)
Total Reserves	45.06 Mt	1.30 g/t	1.89 Moz	—	—	31 Dec 2025	PROVEN AND PROBABLE MINERAL RESERVES — GOLDUnverified Evidence record Round Mountain Total Reserve · Au · as at 2025-12-31 Reported figure Area Whole project Basis attributable Ore tonnes (t) 45055000.0000 Grade 1.3000 Contained (oz) 1888000.0000 Classification Reserve Source trail 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit) PROVEN AND PROBABLE MINERAL RESERVES — GOLD Published 2026-03-26 Verification Approved; not independently verified · Model extracted QA INFO: inclusive-of-reserves flag cleared — the flag describes resource statements; reserve rows carry none. Copies a pre-filled issue record so you can send it through your normal channel.	notes (5) Source: 40-F: FORM 40-F — kgc-20251231xex99d1.htm (AIF exhibit)