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FIRST QUANTUM MINERALS REPORTS THIRD QUARTER 2025 RESULTS (In United States dollars, except where noted otherwise)

Financials

NEWS RELEASE

25-31

October 28, 2025

www.first-quantum.com

FIRST QUANTUM MINERALS REPORTS THIRD QUARTER 2025 RESULTS

(In United States dollars, except where noted otherwise)

Toronto, Ontario (October 28, 2025) - First Quantum Minerals Ltd. (“First Quantum” or the "Company”) (TSX:

FM) today reports results for the three and nine months ended September 30, 2025 (“Q3 2025” or the "third

quarter") of net loss attributable to shareholders of the Company of $48 million ($0.06 loss per share) and adjusted

loss1 of $16 million ($0.02 adjusted loss per share2) for the third quarter.

“During the quarter, we made meaningful progress on our priorities for 2025. We continued to proactively

strengthen our balance sheet and manage our liquidity with the agreement of a $1 billion non-debt gold stream

arrangement with Royal Gold. In addition, we undertook a series of bond transactions to extend our debt profile,

with our earliest bond maturity now occurring in 2029. Operationally, production continued to improve quarter-over-

quarter and we remain on track with our production guidance for the year. We have successfully delivered the

Kansanshi S3 Expansion project, which produced first concentrate in August. This marks First Quantum’s ninth

major self-built project in the last two decades that has allowed the Company to grow into the leading global copper

producer that it is today,” said Tristan Pascall, Chief Executive Officer of First Quantum. “In Panama, the remaining

concentrate shipments were completed safely and without incident during the quarter. The Government of Panama

is advancing the environmental study. We continue our work on Preservation and Safe Management of Cobre

Panamá and expect to restart the power plant in the fourth quarter. Our focus remains on reaching a constructive

resolution for the mine that serves the best interests of our stakeholders, the government, and the people of

Panama.”

Q3 2025 SUMMARY

In Q3 2025, First Quantum reported gross profit of $360 million, EBITDA 1 of $435 million, net loss attributable to

shareholders of $0.06 per share, and adjusted loss per share 1 of $0.02. Relative to the second quarter of 2025

(“Q2 2025”), while third quarter financial results benefitted from improved production at Kansanshi and Sentinel,

stronger realized metal prices 2, and concentrate sales from Cobre Panamá, financial results were impacted by

lower sales at Kansanshi related to the replenishment of inventories.

Along with third quarter results, the Company has updated 2025 guidance:.

• Copper production guidance has narrowed from 380,000 – 440,000 tonnes to 390,000 – 410,000 tonnes,

• Gold production guidance has narrowed from 135,000 – 155,000 tonnes to 140,000 – 150,000 ounces,

• Nickel production guidance has narrowed from 15,000 – 25,000 tonnes to 18,000 – 23,000 tonnes,

• Copper C1 cash cost 3 has narrowed from $1.85 – $2.10 per lb to $1.95 – $2.10 per lb,

• Nickel C1 cash cost 3 has been lowered from $5.00 – $6.50 per lb to $4.75 – $5.50 per lb, and

• Total capital expenditure guidance has been reduced from a range of $1,300 – $1,450 million to $1,150 –

$1,250 million, based on spend to date and the latest expected timing of capital expenditures.

1 EBITDA and adjusted earnings (loss) are non-GAAP financial measures. These measures do not have a standardized meaning prescribed by IFRS and might not be

comparable to similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

2 Realized metal prices are non-GAAP ratios which do not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures

disclosed by other issuers. See “Regulatory Disclosures”.

3 Copper C1 cash cost (copper C1), and copper all-in sustaining costs (copper AISC) are non-GAAP ratios which do not have a standardized meaning prescribed by IFRS and

might not be comparable to similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

Q3 2025 OPERATIONAL HIGHLIGHTS

Total copper production for the third quarter was 104,626 tonnes, a 15% increase from Q2 2025 as a result of

higher production from Sentinel and Kansanshi. Copper C1 cash cost 1 was $0.05 per lb lower quarter-over-quarter

at $1.95 per lb, reflecting higher copper production volumes. Copper sales volumes totalled 118,825 tonnes,

approximately 14,199 tonnes higher than production due to the shipment of 24,306 tonnes of copper from Cobre

Panamá during the quarter with the approval of the Preservation and Safe Management ("P&SM") plan by the

Government of Panama ("GOP"). Copper sales volumes at Kansanshi were lower than production as anode

inventory levels were replenished following the planned 40-day smelter shutdown in the second quarter, which

returned to operation in early July.

• Kansanshi reported copper production of 46,881 tonnes in Q3 2025, an increase of 6,778 tonnes from the

previous quarter due to an increase in mill throughput as the Kansanshi S3 Expansion project was

commissioned and produced first concentrate in August. The accelerated ramp-up of S3, circuit

stabilization and recoveries surpassed budgeted expectations and had a positive impact on production,

contributing 6,136 tonnes of copper during the quarter. Copper C1 cash cost 4 of $ 1.34 per lb was $ 0.13

lower quarter-over-quarter as a result of higher production. Copper production guidance for 2025 has

narrowed to 175,000 – 185,000 tonnes, while gold production guidance has increased to 110,000 –

115,000 ounces. Copper and gold production in the fourth quarter are expected to exceed third quarter

levels, driven by a faster than anticipated ramp up of the Kansanshi S3 Expansion throughput and

recoveries, resulting in stable circuit performance ahead of schedule.

• Sentinel reported copper production of 51,336 tonnes in Q3 2025, 8,228 tonnes higher than the previous

quarter. Mill throughput averaged over 5 million tonnes per month, representing a 14% increase from Q2

2025 levels, benefitting from improved ore fragmentation, reliability and performance of the primary

crushers and performance of the crushed ore mill feed stockpile. Copper C1 cash cost1 of $2.53 per lb was

$0.24 lower than the preceding quarter as a result of higher production volumes. During the quarter, the

Company continued to advance its maintenance program to address the fatigue in the Ball Mill 2 flange

bolts. Building on the progress made in the previous quarter, work is ongoing in collaboration with the

original equipment manufacturer ("OEM") and specialist engineering consultants to address the high levels

of ongoing routine maintenance otherwise required to counter the fatigue situation. The development of a

long-term corrective procedure remains a key focus to ensure sustained mill performance and reliability.

The relocation of In-Pit Crusher 2 has been completed and is expected to be commissioned in the fourth

quarter of 2025. The innovative low-energy consumption rail run conveyor, which was showcased on the

Company's Zambia tour in September, will require some modification as performance testing continues

towards final commissioning of the asset. Production guidance for 2025 has been updated to 190,000 –

200,000 tonnes of copper to reflect performance to date. Grades are expected to be relatively higher in the

fourth quarter of 2025 as mining progresses to the bottom of the Stage 1 pit for sump development ahead

of the wet season and the transition to higher primary sulphide ore volumes reporting from Stage 3.

• In the third quarter of 2025, Enterprise produced 5,767 tonnes of nickel, a 44% increase over the previous

quarter due to higher throughput and supported by 19% higher recoveries quarter-over-quarter. Grades

continued to be impacted by a higher proportion of transitional ore from the Stage 3 area. Nickel C1 cash

cost1 of $4.17 per lb is $1.66 lower than the previous quarter due to higher production volumes. Production

guidance for 2025 was narrowed to 18,000 – 23,000 contained tonnes of nickel while n ickel unit cost

guidance has been reduced to reflect year-to-date operational performance.

• At Cobre Panam á, maintenance refurbishment of subsystems in the flotation area and conveyor belts

began last quarter and continues as part of the overall fixed plant preservation plan. Special attention has

been given to valve inspections and maintenance throughout the plant, along with a more thorough

examination of the stockpile feeders, which were found to be in fair condition. Detailed inspections with

OEM specialists began last quarter to assess the condition of the mobile fleet after 18 months of long-term

preservation storage. Inspections of ultra-class haul trucks and production drills are approaching

completion and rope shovels are scheduled for review in the upcoming quarter. Findings are being used to

First Quantum Minerals Ltd. 25-31

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1 C1 cash cost (C1) is a non-GAAP ratio, which does not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures disclosed

by other issuers. See “Regulatory Disclosures”

refine the preservation strategy to ensure asset safety and integrity. P&SM costs during the third quarter

averaged approximately $15 million per month and included services related to the copper concentrate

shipments. P&SM costs are expected to increase to approximately $15 million to $17 million per month

with the restart of the power plant in the fourth quarter of 2025, although the incremental costs are

anticipated to be partially offset by the potential sale of excess power to support the national grid. Royalty

payments associated with the copper concentrate sales are paid in arrears and expected to be made

during the fourth quarter of 2025.

2025 GUIDANCE

Guidance provided below is based on a number of assumptions and estimates as of September 30, 2025,

including, among other things, assumptions about metal prices and anticipated costs and expenditures. Guidance

involves estimates of known and unknown risks, uncertainties and other factors, which may cause the actual

results to be materially different.

Guidance has been updated for copper, gold and nickel production to reflect year-to-date performance and outlook

for the remainder of the year.

Copper production guidance has narrowed from 380,000 – 440,000 tonnes to 390,000 – 410,000 tonnes. Strong

performance from Kansanshi has resulted in guidance being narrowed to the upper end of the original guidance

range while guidance for Guelb Moghrein and Çayeli has increased. Guidance for Sentinel has been updated to

reflect the performance to date.

Gold production guidance has been narrowed towards the upper end of the range to reflect higher grades

experienced to date at Kansanshi.

Copper unit cost guidance has narrowed for both C1 2 and AISC 2 to reflect performance to date, coupled with

strong by-product credits and lower fuel costs, offset by higher employee costs and increased Zambian electricity

costs. The assumptions underlying this guidance include a gold price of $3,800 per ounce, an average Brent crude

oil price of $75 per barrel, a Zambian kwacha to US dollar exchange rate of 26, and royalties based on consensus

copper prices.

Nickel unit cost guidance for Enterprise nickel has been reduced to reflect year-to-date operational performance.

Guidance for total capital expenditure has been reduced from a range of $1,300 – $1,450 million to $1,150 –

$1,250 million, based on spending to date and the latest expected timing of capital expenditures.

Capital expenditure for the three and nine months ended September 30, 2025 was $280 million and $833 million,

respectively. Year-to-date expenditure on the Kansanshi S3 Expansion project was approximately $233 million,

with a total of $1,080 million spent since the start of the project and approximately a further $32 million committed.

The project is expected to finish under the original budget of $1,250 million. Ongoing project capital works on

Tailings Storage Facility 2 ("TSF2") are expected to complete in the second quarter of 2026.

Interest expense on debt for the full year 2025 is expected to be approximately $550 million to $575 million,

reflecting the financing activities that have taken place throughout the year, and excludes interest accrued on

related party loans to Cobre Panamá and Ravensthorpe, finance cost accreted on deferred revenue, capitalized

interest expense and accretion on asset retirement obligation.

Cash outflow on interest paid is expected to be approximately $450 million to $475 million for the full year 2025.

This excludes interest paid on related party loans to Cobre Panamá and Ravensthorpe as well as capitalized

interest paid.

Capitalized interest is expected to be approximately $75 million for the full year 2025.

The effective tax rate is expected to be approximately 30% to 35% for the full year 2025.

The full year 2025 depreciation expense excluding Cobre Panamá is expected to be between $675 million to $725

million. While under P&SM, depreciation at Cobre Panamá is expected to be $80 million to $100 million on an

First Quantum Minerals Ltd. 25-31

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2 Copper C1 cash cost (copper C1), and copper all-in sustaining costs (copper AISC) are non-GAAP ratios which do not have a standardized meaning prescribed by IFRS and

might not be comparable to similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

annualized basis, which includes approximately $40 million of depreciation associated with the sale of copper

concentrate from the shed.

PRODUCTION GUIDANCE

000’s 2025 Previous

Guidance

2025 Updated

Guidance

Copper (tonnes) 380 – 440 390 – 410

Gold (ounces) 135 – 155 140 – 150

Nickel (contained tonnes) 15 – 25 18 – 23

PRODUCTION GUIDANCE BY OPERATION1

Copper production guidance (000’s tonnes) 2025 Previous

Guidance

2025 Updated

Guidance

Kansanshi 160 – 190 175 – 185

Trident – Sentinel 200 – 230 190 – 200

Other sites 20 25

Gold production guidance (000’s ounces)

Kansanshi 100 – 110 110 – 115

Guelb Moghrein 35 – 45 30 – 35

Nickel production guidance (000’s contained tonnes)

Trident – Enterprise 15 – 25 18 – 23

1 Production is stated on a 100% basis as the Company consolidates all operations.

CASH COST1 AND ALL-IN SUSTAINING COST1

Total Copper 2025 Previous

Guidance

2025 Updated

Guidance

C1 (per lb)1 $1.85 – $2.10 $1.95 – $2.10

AISC (per lb)1 $3.05 – $3.35 $3.10 – $3.25

Total Nickel 2025 Previous

Guidance

2025 Updated

Guidance

C1 (per lb)1 $5.00 – $6.50 $4.75 – $5.50

AISC (per lb)1 $7.50 – $9.25 $6.50 – $7.50

1 C1 cash cost (C1), and all-in sustaining cost (AISC) are non-GAAP ratios which do not have a standardized meaning prescribed by IFRS and might not be comparable to

similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

PURCHASE AND DEPOSITS ON PROPERTY, PLANT & EQUIPMENT

2025 Previous

Guidance

2025 Guidance

Project capital1 590 – 650 640 – 675

Sustaining capital1 450 – 500 335 – 375

Capitalized stripping1 260 – 300 175 – 200

Total capital expenditure 1,300 – 1,450 1,150 – 1,250

1 Capitalized stripping, sustaining capital and project capital are non-GAAP financial measures which do not have a standardized meaning prescribed by IFRS and might not be

comparable to similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

FINANCIAL HIGHLIGHTS

Financial results continue to be impacted by the suspension of Cobre Panamá.

• Gross profit for the third quarter of $360 million was $9 million higher than Q2 2025, while EBITDA 1 of

$435 million for the same period was $35 million higher, benefitting from higher copper sales volumes from

the sale of 24,306 tonnes of copper in concentrate from Cobre Panamá and higher realized copper, gold

First Quantum Minerals Ltd. 25-31

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1 EBITDA is a non-GAAP financial measure which does not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures

disclosed by other issuers. See “Regulatory Disclosures”.

and nickel prices2.

• Cash flows from operating activities of $1,195 million ($1.44 per share 1) for the quarter were $415 million

higher than Q2 2025 primarily due to the receipt of $1,000 million under the gold streaming agreement with

Royal Gold.

• Net debt 2 decreased by $702 million during the quarter to $4,751 million with total debt at $5,711 million as

at September 30, 2025. The decrease in net debt 2 is attributable to the receipt of $1,000 million under the

gold stream agreement and EBITDA 1 contributions of $435 million, offset by capital expenditures of $280

million, interest paid of $166 million, inclusive of $25 million of capitalized interest, and $136 million of

working capital outflows.

GOLD STREAMING AGREEMENT

The Company, through a wholly-owned subsidiary incorporated in Canada, entered into a gold streaming

agreement with RGLD Gold AG, a wholly owned subsidiary of Royal Gold, Inc. in August 2025. The Company

received a $1,000 million upfront cash payment in exchange for gold deliveries referenced to copper production

from the Kansanshi mine. The transaction provides long-term, unsecured, non-debt capital which significantly

enhances liquidity. The Company maintains full exposure to the copper production and the majority of the gold

production at Kansanshi while retaining full exposure to the recently identified near-surface gold zone occurrences.

For more information on the transaction, please refer to the August 5, 2025 news release "First Quantum

Announces $1.0 Billion Gold Stream" on the Company's website.

SENIOR NOTES TRANSACTIONS

During the quarter, the Company executed a series of Senior Notes transactions that successfully extended its

debt maturity profile to 2029.

• On August 6, 2025, the Company announced the tender offer to purchase for cash any and all of the

Company’s outstanding 6.875% Senior Notes due 2027.

• On August 6, 2025, the Company announced the tender offer to purchase for up to $250 million aggregate

principal amount outstanding of its 9.375% Senior Notes due 2029.

• An offering of $1,000 million 7.250% Senior Notes due 2034 was completed on August 20, 2025. Gross

proceeds from the notes offering, together with cash on the balance sheet, was used to fund the tender

offer for the existing 6.875% Senior Notes due 2027 and to redeem any Senior Notes due 2027 not

accepted for purchase in the tender offer, to fund the tender offer for a portion of the existing 9.375%

senior secured second lien notes due 2029 and pay related fees, costs and expenses.

HEDGING PROGRAM

As at October 28, 2025, the Company had zero cost copper collar contracts outstanding for 171,300 tonnes at

weighted average prices of $4.12 per lb to $4.72 per lb with maturities to June 2026. Of these, there were 72,825

tonnes with maturities to the end of 2025 with weighted average prices of $4.11 per lb to $4.85 per lb.

Approximately 70% of remaining planned production and sales in 2025, and approximately 50% of planned

production and sales for the first half of 2026 are protected from spot copper price movements. The increase in

hedged proportion of the remaining 2025 production is largely as a result of narrowed production guidance. In

addition, as at October 28, 2025, the Company had zero cost gold collar contracts outstanding for 63,768 ounces

at weighted average prices of $2,954 per oz to $4,215 per oz with maturities to June 2026.

First Quantum Minerals Ltd. 25-31

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1 Cash flows from operating activities per share, and realized metal prices are non-GAAP ratios which do not have a standardized meaning prescribed by IFRS and might not be

comparable to similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

2 Net debt is a supplementary financial measure which does not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures

disclosed by other issuers. See “Regulatory Disclosures”.

REALIZED METAL PRICES1

QUARTERLY

Q3 2025 Q2 2025 Q3 2024

Average LME copper cash price (per lb) $4.44 $4.32 $4.18

Realized copper price1 (per lb) $4.38 $4.30 $4.24

Treatment/refining charges (“TC/RC”) (per lb) ($0.04) ($0.04) ($0.06)

Freight charges (per lb) ($0.04) ($0.01) ($0.03)

Net realized copper price1 (per lb) $4.30 $4.25 $4.15

Average LBMA cash price (per oz) $3,455 $3,281 $2,474

Net realized gold price1,2 (per oz) $3,358 $3,166 $2,383

Average LME nickel cash price (per lb) $6.81 $6.88 $7.37

Net realized nickel price1 (per lb) $6.86 $6.11 $7.35

1 Realized metal prices are a non-GAAP ratio, do not have standardized meanings under IFRS and might not be comparable to similar financial measures disclosed by other

issuers. See “Regulatory Disclosures” for further information.

2 Excludes gold revenues recognized under the precious metal stream arrangement.

CONSOLIDATED OPERATING HIGHLIGHTS

QUARTERLY

Q3 2025 Q2 2025 Q3 2024

Copper production (tonnes)1 104,626 91,069 116,088

Kansanshi 46,881 40,103 49,810

Sentinel 51,336 43,108 58,412

Other Sites2 6,409 7,858 7,866

Copper sales (tonnes)3 118,825 101,173 112,094

Kansanshi3 38,170 43,291 49,131

Sentinel 48,410 43,241 53,662

Other Sites2 7,939 6,393 9,301

Gold production (ounces) 36,463 37,419 41,006

Kansanshi 27,854 27,764 31,659

Guelb Moghrein 7,832 8,887 8,621

Other sites4 777 768 726

Gold sales (ounces)5 43,658 46,687 43,371

Kansanshi 24,313 31,584 34,186

Guelb Moghrein 7,575 11,121 8,382

Other sites4 699 223 803

Nickel production (contained tonnes) 5,767 4,018 4,827

Nickel sales (contained tonnes) 2,917 6,383 4,598

Cash cost of copper production (C1) (per lb)3,6 $1.95 $2.00 $1.57

C1 (per lb) excluding Cobre Panamá3,6 $1.95 $2.00 $1.57

Total cost of copper production (C3) (per lb)3,6 $3.22 $3.11 $2.59

Copper all-in sustaining cost (AISC) (per lb)3,6 $3.07 $3.28 $2.42

AISC (per lb) excluding Cobre Panamá3,6 $3.00 $3.18 $2.35

1 Production is presented on a contained basis, and is presented prior to processing through the Kansanshi smelter.

2 Other sites (copper) includes Guelb Moghrein and Çayeli.

3 Sales exclude the sale of copper anode produced from third-party concentrate purchased at Kansanshi. Sales of copper anode attributable to third-party concentrate purchases

were 1,844 tonnes and 8,609 tonnes for the for the three and nine months ended September 30, 2025 (7,537 tonnes and 25,427 tonnes for the for the three and nine months

ended September 30, 2024).

4 Other sites (gold) includes Çayeli and Pyhäsalmi.

5 Excludes refinery-backed gold credits purchased and delivered under the precious metal streaming arrangement (see “Precious Metal Stream Arrangement”).

6 Copper all-in sustaining cost (copper AISC), copper C1 cash cost (copper C1), and total cost of copper (copper C3) are non-GAAP ratios, which do not have a standardized

meaning prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. See “Regulatory Disclosures”.

First Quantum Minerals Ltd. 25-31

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CONSOLIDATED FINANCIAL HIGHLIGHTS

QUARTERLY

Q3 2025 Q2 2025 Q3 2024

Sales revenues 1,346 1,226 1,279

Gross profit 360 351 456

Net earnings (loss) attributable to shareholders of

the Company (48) 18 108

Basic net earnings (loss) per share ($0.06) $0.02 $0.13

Diluted net earnings (loss) per share ($0.06) $0.02 $0.13

Cash flows from operating activities 1,195 780 260

Net debt1 4,751 5,453 5,591

EBITDA1,2 435 400 520

Adjusted earnings (loss)1 (16) 17 119

Adjusted earnings (loss) per share3 ($0.02) $0.02 $0.14

Cash cost of copper production excluding Cobre

Panamá (C1) (per lb)3,4 $1.95 $2.00 $1.57

Total cost of copper production excluding Cobre

Panamá (C3) (per lb)3,4 $3.17 $3.05 $2.83

Copper all-in sustaining cost excluding Cobre

Panamá (AISC) (per lb)3,4 $3.00 $3.18 $2.35

Cash cost of copper production (C1) (per lb)3,4 $1.95 $2.00 $1.57

Total cost of copper production (C3) (per lb)3,4 $3.22 $3.11 $2.59

Copper all-in sustaining cost (AISC) (per lb)3,4 $3.07 $3.28 $2.42

Realized copper price (per lb)3 $4.38 $4.30 $4.24

Net earnings (loss) attributable to shareholders of

the Company (48) 18 108

Adjustments attributable to shareholders of the

Company:

Adjustment for expected phasing of Zambian

value-added tax (“VAT”) (8) (19) (17)

Modification and redemption of liabilities 25 – –

Total adjustments to EBITDA1 excluding

depreciation2 16 8 32

Tax adjustments – 12 –

Minority interest adjustments (1) (2) (4)

Adjusted earnings (loss)1 (16) 17 119

1 EBITDA and adjusted earnings (loss) are non-GAAP financial measures, and net debt is a supplementary financial measure. These measures do not have a standardized

meaning under IFRS and might not be comparable to similar financial measures disclosed by other issuers. Adjusted earnings (loss) have been adjusted to exclude items from

the corresponding IFRS measure, net earnings (loss) attributable to shareholders of the Company, which are not considered by management to be reflective of underlying

performance. The Company has disclosed these measures to assist with the understanding of results and to provide further financial information about the results to investors

and may not be comparable to similar financial measures disclosed by other issuers. The use of adjusted earnings (loss) and EBITDA represents the Company’s adjusted

earnings (loss) metrics. See “Regulatory Disclosures”.

2 Adjustments to EBITDA in 2025 relate principally to the adjustment for expected phasing of Zambian VAT and the tax effect on unrealized movements in the fair value of

derivatives designated as hedging instruments (2024 - relate to an impairment expense of $71 million, a foreign exchange revaluations gain of $14m and a restructuring

expense of $12 million).

3 Adjusted earnings (loss) per share, realized metal prices, copper all-in sustaining cost (copper AISC), copper C1 cash cost (copper C1) and total cost of copper (copper C3) are

non-GAAP ratios, which do not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. See

“Regulatory Disclosures”.

4Excludes the sale of copper anode produced from third-party concentrate purchased at Kansanshi. Sales of copper anode attributable to third-party concentrate purchases were

1,844 tonnes and 8,609 tonnes for the three and nine months ended September 30, 2025 (7,537 tonnes and 25,427 tonnes for the three and nine months ended September

30, 2024).

COBRE PANAMÁ UPDATE

On May 30, 2025, the GOP approved and formally instructed the execution of the P&SM plan.

The P&SM approval authorized the export of 122,520 dry metric tonnes of copper concentrate. Following the first

shipment at the end of the second quarter, the remaining concentrate was exported during the third quarter of

2025. The proceeds from the concentrate sales will be used to fund P&SM activities, including local supply and

procurement in Panama and the ongoing environmental stewardship of the mine and its surroundings.

First Quantum Minerals Ltd. 25-31

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The execution of the P&SM plan also provides for the import of fuel and the restart of Cobre Panamá’s power

plant. The Company has commenced pre-commissioning activities of the power plant and the mobilization of

specialists to site. The power plant is currently anticipated to restart in the fourth quarter of 2025, with the first

150MW unit expected to be fired and synchronized with the grid in November. With the re-commissioning of the

power plant, approximately 100 new employment hires have been made.

In August, the Ministry of Environment ("MiAmbiente") issued the final Terms of Reference for an integral audit of

the Cobre Panamá mine. On October 10, MiAmbiente formally issued the order for SGS Panama Control Services

Inc. (“SGS”) to proceed with the integral audit. MiAmbiente and the Ministry of Commerce and Industries, together

with SGS, are coordinating the audit planning and implementation, which is expected to cover environmental,

social, legal, and fiscal compliance aspects.

In addition to the integral audit, the authorities have continued with the statutory 6-monthly audits of Cobre

Panama’s compliance with its commitments under the ESIA. The most recently published audit achieved 100%

compliance on environmental topics, with one overall non-conformance related to occupational health and safety

commitments. The 11th external audit field inspection component was completed in June 2025 and the final report

is scheduled for submission in the fourth quarter.

Engagement with local governments in nearby municipalities was further strengthened during the quarter.

Coordination efforts focused on aligning community initiatives in education, health, infrastructure, and

environmental programs to deliver tangible benefits for more than 3,500 children across over 40 schools and over

5,000 community members, while also reinforcing relationships and transparency in the implementation of the

P&SM plan. Public outreach efforts also continued nationwide, including informational sessions and online

engagement. Since 2024, more than 170,000 Panamanians have been reached directly through over 1,000 public

events, while over 325,000 Panamanians have participated in the Company’s virtual mine tour platform.

KANSANSHI S3 EXPANSION

The Kansanshi S3 Expansion project successfully transitioned from commissioning into early operation, with first

ore introduced in July and first concentrate produced in August. The project remains on schedule, with operational

ramp-up now in progress, and expected to finish under the original budget of $1,250 million. The plant is now

maintaining 24 hour operations with support from the commissioning team and vendor specialists. The Kansanshi

S3 Expansion contributed 6,136 tonnes of copper in the third quarter.

The project achieved 98% construction completion and 95% of systems have been handed over to commissioning/

operations. During the quarter, the full copper circuit was brought online in stages with a focus on tuning the circuit

and ramping up towards nameplate and steady state production. Final outstanding construction and

commissioning is in progress for the gravity gold circuit, non-process infrastructure and assisting with any changes

associated with the operational ramp up.

In addition, the smelter expansion works are complete whilst acid plant 5 is currently in the hot commissioning

stage. Ongoing project capital works on TSF2 are expected to complete in the second quarter of 2026. Mining

operations at the South East Dome pit have progressed, with approximately 240,000 tonnes of ore fed to the S3

plant year-to-date.

Zambian Power Supply

During the third quarter of 2025, Zambia’s national power supply remained stable, supported by improved

hydrology and ongoing regional imports, even as supply generation in the country remains below national

electricity demand levels. Although reservoir levels at Lake Kariba recovered during the first half of the year, the

force majeure declared in early 2024 remains in effect. The Company experienced no material load shedding

during the period, however, the Company anticipates maintaining supplementary sourcing and import

arrangements through to the first half of 2027 to support the continued recovery of Lake Kariba’s hydropower

capacity.

The annualized impact of the Company’s supplementary sourcing strategy on 2025 copper C1 cash cost 1 is

expected to rise modestly from the previously reported $0.07 per lb to approximately $0.11 per lb, reflecting

First Quantum Minerals Ltd. 25-31

Page 8 of 15

1 C1 cash cost (C1) is a non-GAAP ratio, and does not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures disclosed by

other issuers. See “Regulatory Disclosures”