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OPERATIONAL OVERVIEW

Refer to Capstone's Q4 2024 MD&A and Financial Statements for detailed operating results.

Consolidated Production

Q4 2024 copper production of 53,942 tonnes was 22% higher than Q4 2023 primarily as a result of sulphide production ramping up at Mantoverde and Mantos Blancos.

Q4 2024 C1 cash costs¹ of $2.56/lb were 4% lower than $2.67/lb Q4 2023 mainly due to higher production (-$0.24/lb), partially offset by lower capitalized stripping costs ($0.15/lb).

2024 consolidated production of 184,460 tonnes of copper was 12% higher than 164,353 tonnes in 2023, mainly due to the start of concentrate production at Mantoverde, partially offset by lower cathode production at Mantos Blancos. Cozamin and Pinto Valley production was consistent with the prior year.

2024 C1 cash costs¹ of $2.77/lb were 4% lower than $2.88/lb 2023 due to higher copper production (-$0.20/lb), partially offset by lower capitalized stripping costs ($0.09/lb).

Pinto Valley Mine

Copper production of 11.6 thousand tonnes in Q4 2024 was 27% lower than in Q4 2023 due to ore face position resulting in lower grades (Q4 2024 – 0.30% versus Q4 2023 - 0.36%) and lower mill throughput during the quarter (Q4 2024 - 45,148 tpd versus Q4 2023 - 53,134 tpd). Mill throughput in Q4 2024 was impacted by unplanned downtime as a result of mechanical failures and electrical issues, and unscheduled maintenance on one of the six ball mills which led to the concentrator operating at a reduced rate for a period of 18 days.

2024 production was 4% higher than 2023 due to slightly higher mill throughput (49,461 tpd 2024 versus 49,273 tpd 2023), higher feed grade tied to mine plan sequence (0.34% in 2024 versus 0.33% in 2023) and slightly higher recoveries (87.4% 2024 versus 87.2% 2023).

C1 cash costs¹ of $3.30/lb in Q4 2024 were 40% higher than Q4 2023 of $2.36/lb primarily due to lower production volume ($1.13/lb) and with minimal impact from operating costs ($0.05/lb), partially offset by lower treatment costs (-$0.24/lb).

2024 C1 cash costs¹ of $2.77/lb were 1% lower compared to the same period last year of $2.79/lb primarily due to higher production volume (-$0.11/lb) and increased deferred stripping (-$0.18/lb), partially offset by increased operating costs ($0.17/lb) due to spend on equipment maintenance and contractors and higher electricity rates ($0.091/kWh in 2024 versus $0.079/kWh in 2023), and lower by-product credits ($0.09/lb).

Mantos Blancos Mine

Q4 2024 production was 13.6 thousand tonnes, composed of 12.2 thousand tonnes from sulphide operations and 1.4 thousand tonnes of cathode from oxide operations, which was 17% higher than the 11.6 thousand tonnes produced in Q4 2023. Sulphide production increased in Q4 2024 driven by the successful ramp-up of the concentrator after the installation of new equipment in the tailings handling area during Q3 2024. Overall in Q4 2024, Mantos Blancos averaged sulphide plant throughput of approximately 19,579 tpd, including an average of 20,137 tpd through November and December (compared to 16,027 tpd overall in 2024 and 14,635 tpd in 2023). Lower cathode production was impacted by lower planned dump throughput and grade in line with the 2024 mine plan.

2024 production of 44.6 thousand tonnes, composed of 37.7 thousand tonnes of copper in concentrate and 6.8 thousand tonnes of cathodes, was 10% lower than 2023, mainly explained by 43% lower cathode production due to lower dump throughput and grade in line with the 2024 plan, and to a lesser extent by lower sulphides feed grades as a result of mine sequence (0.81% in 2024 versus 0.91% in 2023).

Combined Q4 2024 C1 cash costs¹ of $2.45/lb ($2.30/lb sulphides and $3.70/lb cathodes) were 10% lower compared to combined C1 cash costs¹ of $2.71/lb in Q4 2023, mainly due to higher copper concentrate production (-$0.39/lb) and lower diesel prices (-$0.06/lb), partially offset by higher mine expense as a result of mine sequence ($0.18/lb).

Combined 2024 C1 cash costs¹ of $3.02/lb ($2.95/lb sulphides and $3.41/lb cathodes) were 7% higher compared to $2.83/lb in 2023 mainly due to lower production in line with plan ($0.32/lb) partially offset by lower acid and energy consumption (-$0.10/lb).

Mantoverde Mine

Q4 2024 copper production of 22.0 thousand tonnes, composed of 13.6 thousand tonnes of copper from sulphide operations and 8.4 thousand tonnes of cathode, was 120% higher compared to 10.0 thousand tonnes in Q4 2023 driven by the ramp-up of MVDP. Heap production decreased in Q4 2024 driven by lower grades (0.31% in Q3 2024 versus 0.41% in Q4 2023) as expected by the mining sequence and lower throughput (2,512kt in Q4 2024 versus 2,831kt in Q4 2023), which was partially offset by higher recoveries (79.7% in Q4 2024 versus 64.6% in Q4 2023).

Mantoverde sulphides posted record quarterly copper production of 13,580 tonnes from the new sulphide concentrator in Q4 2024. During the quarter, plant throughput averaged 24,848 tpd, copper grades averaged 0.80%, and physical copper recoveries averaged 74.4%. Plant throughput was impacted by a combination of planned and unplanned downtime, with the planned downtime used to improve recoveries, and the unplanned downtime mostly driven by typical ramp-up issues. Plant availability and recoveries have steadily increased since first copper production in June, and in December, plant throughput averaged 27,105 tpd, copper grades averaged 0.73%, and physical copper recoveries averaged 84.8%.

2024 production of 57.7 thousand tonnes was 63% higher than 2023 mainly due to copper in concentrate production of 21.8 thousand tonnes and higher cathode production by 0.5 thousand tonnes mainly driven by higher heap recovery and grade as a result of mine sequence (0.35% in 2024 versus 0.34% in 2023).

Q4 2024 C1 cash costs¹ were $2.53/lb, 31% lower than $3.68/lb in Q4 2023 due to higher production of low-cost sulphides (-$1.19/lb), lower energy prices (-$0.16/lb) which averaged $0.09/kWh in Q4 2024 versus $0.17/kWh in Q4 2023, and lower acid consumption related to lower throughput (-$0.12/lb), partially offset by an increase in contracted services, spare parts and labour cost mainly driven by higher mine movement ($0.34/lb).

2024 C1 cash costs¹ were $3.00/lb, 22% lower than $3.83/lb in 2023, mainly related to higher production (-$0.91/lb), lower energy price due to contract conditions effective January 2024 (-$0.26/lb), lower acid prices and consumption related to lower throughput (-$0.14/lb), which was partially offset by an increase in contracted services, spare parts and labour cost mainly driven by higher mine movement ($0.49/lb).

Cozamin Mine

Q4 2024 copper production of 6.7 thousand tonnes was 2% higher than in the prior year, mainly on higher grades (2.03% in Q4 2024 versus 1.95% in Q4 2023) driven by mine sequence. Mill throughput and recoveries were consistent quarter over quarter.

2024 production was 2% higher than 2023 due to higher grades (1.96% in 2024 versus 1.89% in 2023), consistent with the mine plan, which was partially offset by slightly lower mill throughput (3,581 tpd in 2024 versus 3,639 tpd in 2023). Recoveries were consistent with the same period previous year.

Q4 2024 C1 cash costs¹ were $1.55/lb, 12% lower than in the same period previous year, mainly due to higher production, higher silver by-product volume and price (-$0.12/lb), as well as lower operating costs than the previous year (-$0.07/lb) impacted by a weakening of the Mexican peso relative to the US dollar.

2024 C1 cash costs¹ were consistent with the previous year: higher costs in manpower for hourly employees bonus profit sharing increase and the change in mining method which resulted in an increase in higher contractor utilization, which were offset by more pounds payable produced and higher by-product silver prices and volume.

Mantoverde Development Project

The Mantoverde Development Project ("MVDP") involved the addition of a sulphide concentrator (nominal 32,000 ore tonnes per day ("tpd")) and tailings storage facility, and the expansion of the existing desalination plant and other minor infrastructure, in order to process sulphide ore. Mantoverde continues to process oxide ore through heap and dump run of mine leaching and a conventional solvent extraction and electrowinning ("SX-EW") plant. The final total project capital spent was $870 million which was in line with the revised budget of $870 million and compared to the initial Capstone Copper estimate of $825 million.

After producing first copper concentrate in June 2024, the MVDP achieved commercial production on September 21, 2024, and the mill ramped up to full nominal milling rates by year end, including a peak individual daily throughput of 37,989 tpd in 2024.

Mantoverde sulphides posted quarterly copper production of 13,580 tonnes from the new sulphide concentrator in Q4 2024. During the quarter, plant throughput averaged 24,848 tpd, copper grades averaged 0.80%, and copper recoveries averaged 74.4%. Plant throughput was impacted by a combination of planned and unplanned downtime, with the planned downtime used to improve recoveries, and the unplanned downtime mostly driven by typical ramp-up issues. Examples of the issues faced in the quarter included a drive shaft assembly failure in the stockpile apron feeder - which forced operations to continue with only one feeder - and a frozen charge event in the ball mill due to a variable frequency drive failure. Plant availability and recoveries have steadily increased since first copper production in June, and in December, plant throughput averaged 27,105 tpd (November: 26,278 tpd, October: 21,206 tpd), copper grades averaged 0.73% (November: 0.85%, October 0.83%), and copper recoveries averaged 84.8% (November 70.9%, October 67.0%).

Subsequent to quarter end in January 2025, Mantoverde sulphides posted record monthly copper production of 6,600 tonnes, driven by plant throughput of 33,409 tpd, copper grades of 0.79%, and copper recoveries of 81.0%. Peak individual daily throughput totaled 38,511 tpd in January.

MV Optimized Feasibility Study

The Company announced its Mantoverde Optimized ("MV Optimized") Feasibility Study ("FS") on October 1, 2024. The project is a capital-efficient expansion of Mantoverde's sulphide concentrator, increasing throughput from 32,000 to 45,000 ore tpd and extending the mine life from 19 to 25 years. With an updated sulphide Mineral Reserve of 398 million tonnes at a copper grade of 0.49% (compared to 236 million tonnes at 0.60% copper previously), the project will yield an additional 368,000 tonnes of copper and 215,000 ounces of gold, with an initial expansionary capital investment of $146 million and an implied capital intensity of approximately $7,500 per copper tonne. Capstone Copper anticipates starting construction after receiving the DIA environmental permit approval, which is expected around the middle of 2025. The MV Optimized FS also features a robust life of mine after-tax NPV (8%) of $2.9 billion for Mantoverde operation on a 100%-basis based on a long-term copper price of $4.10/lb and gold price of $1,800/oz.

Santo Domingo Feasibility Study & Sierra Norte Acquisition

Capstone Copper announced the results of an updated FS for its 100%-owned Santo Domingo copper-iron-gold project in Region III Chile, 35km northeast of Mantoverde on July 31, 2024. The updated FS, completed by Ausenco, outlines the next phase of transformational growth for the Company in the world-class Mantoverde-Santo Domingo ("MV-SD") district.

The 2024 FS for Santo Domingo outlines a robust copper-iron-gold project with an after-tax NPV (8%) of $1.7 billion and an after-tax internal rate of return of 24.1%. Total initial capital cost of $2.3 billion drives a capital intensity of approximately $21,900 per tonne of annual copper equivalent production over the life of mine. Over the first seven years of the mine plan, production is expected to average 106,000 tonnes of copper and 3.7 million tonnes of iron ore magnetite concentrate at first quartile cash costs of $0.28 per payable pound of copper produced.

The 19-year Santo Domingo mine life is supported by an increased Mineral Reserve estimate of 436 million tonnes (compared to 392 million tonnes previously) at a copper grade of 0.33%, iron ore grade of 26.5%, and a gold grade of 0.05 grams per tonne. Increased Measured & Indicated ("M&I") Mineral Resources total 547 million tonnes (compared to 537 million tonnes previously) at a copper grade of 0.31% and a gold grade of 0.04 grams per tonne, including 506 million tonnes with an iron grade of 25.8%.

The FS updated the level of engineering to Association for the Advancement of Cost Engineering ("AACE") Class 3. Further detailed engineering will increase the precision of capital estimates to AACE Class 2 over the balance of 2025.

In Q3 2024, Capstone Copper acquired 100% of the shares of Sierra Norte for $40 million in share consideration. Sierra Norte is located approximately 15 kilometers northwest of the Santo Domingo Project and represents an opportunity to potentially be a future sulphide feed source for Santo Domingo, extending the higher grade copper sulphide life. Potential oxide material at Sierra Norte represents an opportunity to be a future oxide feed for Mantoverde's underutilized SX-EW plant.

The Company is progressing partnership and financing discussions for the Santo Domingo project, while in parallel advancing opportunities to incorporate the recently acquired Sierra Norte project and Santo Domingo’s copper oxide material into the mine plan.

Copper Oxides Opportunity

Capstone Copper plans to progress drilling and studies regarding the processing of oxide material from the Company’s Santo Domingo and Sierra Norte deposits by leveraging Mantoverde’s infrastructure and excess SX-EW capacity. To date, oxide materials have been recognized in the shallower portions of the Santo Domingo, Iris Norte, and Estrellita sulphide ore bodies. Some of these oxide resources are considered as waste material in the Santo Domingo 2024 FS. Meanwhile, only slightly more than half of the processing capacity is being used at Mantoverde’s SX-EW cathode copper plant. Exploration efforts at Santo Domingo will target a potential 80-100 million tonnes of oxide material, which could add up to 10 thousand tonnes per annum of copper production.

Exploration Opportunities in the MV-SD District

Capstone Copper has significant untapped exploration potential within MV-SD district. The Mantoverde Optimized plan was prepared without completing any expansionary drilling since 2019. At Mantoverde, there are 0.2 billion tonnes of M&I and 0.6 billion tonnes of Inferred sulphide resources not in reserves. Exploration targets also include the northern extension (~10km long) of the projection of the prospective Atacama fault system. At Santo Domingo, there are 0.1 billion tonnes of M&I and 0.2 billion tonnes of Inferred sulphide resources not in reserves. The recently acquired Sierra Norte property also represents an opportunity to potentially be a future feed source in the district. Capstone Copper intends to progress its exploration strategy to service its two eventual processing centers between Mantoverde and Santo Domingo, in addition to drilling that is currently underway at Mantoverde to evaluate the potential for Mantoverde Phase II, which could include the addition of an entire second processing line at Mantoverde.

Mantoverde - Santo Domingo Pyrite Augmentation & Cobalt Study

A district cobalt plant for the MV-SD district is designed to unlock cobalt production while reducing sulphuric acid consumption and increasing heap leach copper production. The cobalt recovery process comprises a pyrite flotation step to recover cobaltiferous pyrite from the tailings streams at Mantoverde and Santo Domingo and redirect it to the dynamic heap leach pads, which will be upgraded to a bioleach configuration through the addition of an aeration system as part of MV Optimized. The pyrite oxidizes in the leach pads and the solubilized cobalt is recovered via an ion exchange plant treating a bleed stream from the copper solvent extraction plant. The approach has been successfully demonstrated at the bench and pilot scales.

As currently envisioned, a smaller capacity countercurrent ion-exchange plant will initially treat cobalt by-product streams from Mantoverde producing up to 1,500 tonnes per annum of cobalt, and following sanctioning of the Santo Domingo project, the facility will be expanded to accommodate by-product streams from Santo Domingo. An initial study focused on Mantoverde's pyrite augmentation and cobalt opportunity is expected in 2025, followed by a Santo Domingo study in 2026, for a combined MV-SD target of 4,500 to 6,000 tonnes per annum of mined cobalt production.

Mantos Blancos Phase II Study

The Company is currently evaluating the next phase of growth for Mantos Blancos, which is analyzing the potential to increase the concentrator plant's throughput to at least 27,000 tpd and increase cathode production from the underutilized SX-EW plant. The sulphide concentrator plant expansion is expected to utilize existing and unused or underutilized process equipment, such as two idled ball mills, plus additional equipment for concentrate filtration, thickening and filtering of tailings. The increase in cathode production is being evaluated based on an opportunity to re-leach spent ore from historical VAT leaching operations and coarse/fine tailings material. The increase in cathode production would utilize existing SX-EW plant capacity, with the addition of a dynamic leach pad, agglomeration and stacking infrastructure. The Mantos Blancos Phase II study is expected around the end of 2025.

PV District Growth Study

The Company continues to review and evaluate the consolidation potential of the Pinto Valley district. Opportunities under evaluation include a potential mill expansion and increased leaching capacity supported by optimized water, heap and dump leach, and tailings infrastructure. Pinto Valley district consolidation could unlock significant ESG opportunities and may transform the Company's approach to create value for all stakeholders in the Globe-Miami District.

Leadership Succession Plan

As previously announced the following leadership changes will take effect at the next Annual General Meeting of the Company on May 2, 2025:

• John MacKenzie will transition from Chief Executive Officer and will be nominated to the role of Non-Executive Chair of the Capstone Copper Board of Directors;

• Cashel Meagher, current President and Chief Operating Officer, will succeed Mr. MacKenzie as CEO of Capstone Copper, and will also be nominated as a member of the Board;

• James Whittaker, current Senior Vice President, Head of Chile, will succeed Mr. Meagher as COO. This facilitates a flattening of the organizational structure with all mine general managers reporting directly to the COO;

• Darren M. Pylot, founder of Capstone Mining Corp. ("Capstone Mining") and current Chair of the Board, will end his term on the Board after over 20 years with Capstone Mining as a founder and CEO, and subsequently as Chair of the Board of Capstone Copper.

On January 13, 2025, Capstone Copper announced the appointment of Rick Coleman to the Board of Directors effective January 15, 2025.

Corporate Exploration Update

Cozamin: Exploration drilling continued in Q4 2024 at Cozamin targeting step-outs up-dip and down-dip from the Mala Noche West Target and also down-dip of other historical Mala Noche Vein workings. Drilling was conducted with one underground rig positioned at the level 19.1 cross-cut, a second underground rig positioned at the level 12.7 cross-cut, and one surface rig.

Copper Cities, Arizona: On January 20, 2022, Capstone Mining announced that it had entered into an access agreement with BHP Copper Inc. ("BHP") to conduct drill and metallurgical test-work at BHP's Copper Cities project ("Copper Cities"), located approximately 10 km east of the Pinto Valley mine. This access agreement was recently extended to July 2025. Drilling with two surface rigs twinning historical drill holes was completed in 2022 with metallurgical testing continuing in 2024. District consolidation opportunities are being evaluated.

Mantoverde, Santo Domingo, Sierra Norte and Mantos Blancos, Chile: Mantoverde's exploration drill program commenced in Q4 2024. The program will first target the areas closer to MV Optimized pit focusing on improving copper grades and mineralization continuity within and nearby the pit boundaries. The program will also test areas to the north of the pit to potentially increase the mineral resource. An Induced Polarization (IP) geophysical survey began in Q4 at Mantoverde with the focus to cover the northern extension (~10km long) of the projection of the prospective Atacama fault system. At Sierra Norte work commenced with a revision and validation of the historic drilling database and geological model. Infill drilling continues during Q4 2024 at Mantos Blancos in Phases 15 and 16 and exploration drilling progressed testing the Nora-Quinta target. A high-resolution magnetic survey was also completed at Mantos Blancos during Q4 2024.

2025 Guidance

Production, cash cost, capital expenditures and exploration investment guidance for 2025 remains unchanged from the most recently released guidance as outlined in the news release "Capstone Copper Announces 2024 Production Results and Provides 2025 Guidance" dated January 20, 2025.

2025 forecasted production volumes of 220,000 to 255,000 tonnes of copper are expected to increase by approximately 19% to 38%, while 2025 forecasted C1 cash costs of $2.20 to $2.50 per payable pound of copper are expected to decrease by approximately 10% to 20%, compared to 2024.

In 2025, the Company plans to spend a total of $315 million in sustaining and expansionary capital expenditures at its operating mines and the Santo Domingo Project. This is broken down into $255 million on sustaining capital and $60 million on expansionary capital. In addition, the Company plans to spend a total of $210 million in capitalized stripping at its three open pit mines.

The Company plans to spend $25 million in brownfield and greenfield exploration activities in 2025. The brownfield exploration is focused on resource conversion at Pinto Valley, Mantoverde, Mantos Blancos, Cozamin and Santo Domingo. The greenfield exploration relates to expansionary work in the highly prospective northern area of the Mantoverde land package and at Sierra Norte.

FINANCIAL OVERVIEW

Please refer to Capstone's Q4 2024 MD&A and Financial Statements for detailed financial results.

CONFERENCE CALL AND WEBCAST DETAILS

Capstone will host a conference call and webcast on Wednesday, February 19, at 5:00 pm Eastern Time / 2:00 pm Pacific Time (Thursday, February 20, 2025, 9:00 am Australian Eastern Daylight Time). Link to the audio webcast: https://app.webinar.net/pWrNOolZnQV

Dial-in numbers for the audio-only portion of the conference call are below. Due to an increase in call volume, please dial-in at least five minutes prior to the call to ensure placement into the conference line on time.

Toronto: 1-437-900-0527
Australia: 61-280-171-385
North America toll free: 1-888-510-2154

A replay of the conference call will be available until February 26, 2025. Dial-in numbers for Toronto: 1-289-819-1450 and North American toll free: 1-888-660-6345. The replay code is 65051#. Following the replay, an audio file will be available on Capstone’s website at https://capstonecopper.com/investors/events-and-presentations/.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This document may contain "forward-looking information" within the meaning of Canadian securities legislation and "forward-looking statements" within the meaning of the United States Private Securities Litigation Reform Act of 1995 (collectively, "forward-looking statements"). These forward-looking statements are made as of the date of this document and the Company does not intend, and does not assume any obligation, to update these forward-looking statements, except as required under applicable securities legislation.

Forward-looking statements relate to future events or future performance and reflect the Company's expectations or beliefs regarding future events. The Company's Sustainable Development Strategy goals and strategies are based on a number of assumptions, including, but not limited to, the reliability of data sources; the biodiversity and climate-change consequences; availability and effectiveness of technologies needed to achieve the Company's sustainability goals and priorities; availability of land or other opportunities for conservation, rehabilitation or capacity building on commercially reasonable terms and the Company's ability to obtain any required external approvals or consensus for such opportunities; the availability of clean energy sources and zero-emissions alternatives for transportation on reasonable terms; availability of resources to achieve the goals in a timely manner, the Company's ability to successfully implement new technology; and the performance of new technologies in accordance with the Company's expectations.

Forward-looking statements include, but are not limited to, statements with respect to the estimation of Mineral Resources and Mineral Reserves, the success of the underground paste backfill and tailings filtration projects at Cozamin, the results of the Optimized Mantoverde Development Project ("MV Optimized FS") and Mantoverde Phase II study, the timing and results of PV District Growth Study (as defined below), the timing and results of Mantos Blancos Phase II Feasibility Study, the timing and success of the Mantoverde - Santo Domingo Cobalt Feasibility Study, the results of the Santo Domingo FS Update and success of incorporating synergies previously identified in the Mantoverde - Santo Domingo District Integration Plan, the timing and results of exploration and potential opportunities at Sierra Norte, the realization of Mineral Reserve estimates, the timing and amount of estimated future production, the costs of production and capital expenditures and reclamation, the timing and costs of the Minto obligations and other obligations related to the closure of the Minto Mine, the budgets for exploration at Cozamin, Santo Domingo, Pinto Valley, Mantos Blancos, Mantoverde, and other exploration projects, the timing and success of the Copper Cities project, the success of the Company's mining operations, the continuing success of mineral exploration, the estimations for potential quantities and grade of inferred resources and exploration targets, the Company's ability to fund future exploration activities, the Company's ability to finance the Santo Domingo development project, environmental and geotechnical risks, unanticipated reclamation expenses and title disputes, the success of the synergies and catalysts related to prior transactions, in particular but not limited to, the potential synergies with Mantoverde and Santo Domingo, the anticipated future production, costs of production, including the cost of sulphuric acid and oil and other fuel, capital expenditures and reclamation of Company’s operations and development projects, the Company's estimates of available liquidity, and the risks included in the Company's continuous disclosure filings on SEDAR+ at www.sedarplus.ca. The impact of global events such as pandemics, geopolitical conflict, or other events, to Capstone is dependent on a number of factors outside of the Company's control and knowledge, including the effectiveness of the measures taken by public health and governmental authorities to combat the spread of diseases, global economic uncertainties and outlook due to widespread diseases or geopolitical events or conflicts, supply chain delays resulting in lack of availability of supplies, goods and equipment, and evolving restrictions relating to mining activities and to travel in certain jurisdictions in which we operate. In certain cases, forward-looking statements can be identified by the use of words such as "anticipates", "approximately", "believes", "budget", "estimates", "expects", "forecasts", "guidance", "intends", "plans", "scheduled", "target", or variations of such words and phrases, or statements that certain actions, events or results "be achieved", "could", "may", "might", "occur", "should", "will be taken" or "would" or the negative of these terms or comparable terminology.

In certain cases, forward-looking statements can be identified by the use of words such as "anticipates", "approximately", "believes", "budget", "estimates", expects", "forecasts", "guidance", intends", "plans", "scheduled", "target", or variations of such words and phrases, or statements that certain actions, events or results "be achieved", "could", "may", "might", "occur", "should", "will be taken" or "would" or the negative of these terms or comparable terminology. In this document certain forward-looking statements are identified by words including "anticipated", "expected", "guidance" and "plan". By their very nature, forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause the Company's actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such factors include, amongst others, risks related to inherent hazards associated with mining operations and closure of mining projects, future prices of copper and other metals, compliance with financial covenants, inflation, surety bonding, the Company's ability to raise capital, Capstone Copper’s ability to acquire properties for growth, counterparty risks associated with sales of the Company's metals, use of financial derivative instruments and associated counterparty risks, foreign currency exchange rate fluctuations, market access restrictions or tariffs, changes in general economic conditions, availability and quality of water, accuracy of Mineral Resource and Mineral Reserve estimates, operating in foreign jurisdictions with risk of changes to governmental regulation, compliance with governmental regulations and stock exchange rules, compliance with environmental laws and regulations, reliance on approvals, licences and permits from governmental authorities and potential legal challenges to permit applications, contractual risks including but not limited to, the Company's ability to meet the requirements under the Cozamin Silver Stream Agreement with Wheaton Precious Metals Corp. ("Wheaton"), the Company's ability to meet certain closing conditions under the Santo Domingo Gold Stream Agreement with Wheaton, acting as Indemnitor for Minto Metals Corp.’s surety bond obligations, impact of climate change and changes to climatic conditions at the Company's operations and projects, changes in regulatory requirements and policy related to climate change and greenhouse gas ("GHG") emissions, land reclamation and mine closure obligations, introduction or increase in carbon or other "green" taxes, aboriginal title claims and rights to consultation and accommodation, risks relating to widespread epidemics or pandemic outbreaks; the impact of communicable disease outbreaks on the Company's workforce, risks related to construction activities at the Company's operations and development projects, suppliers and other essential resources and what effect those impacts, if they occur, would have on the Company's business, including the Company's ability to access goods and supplies, the ability to transport the Company's products and impacts on employee productivity, the risks in connection with the operations, cash flow and results of Capstone Copper relating to the unknown duration and impact of the epidemics or pandemics, impacts of inflation, geopolitical events and the effects of global supply chain disruptions, uncertainties and risks related to the potential development of the Santo Domingo development project, risks related to the Mantoverde Development Project ("MVDP"), increased operating and capital costs, increased cost of reclamation, challenges to title to the Company's mineral properties, increased taxes in jurisdictions the Company operates or is subject to tax, changes in tax regimes we are subject to and any changes in law or interpretation of law may be difficult to react to in an efficient manner, maintaining ongoing social licence to operate, seismicity and its effects on the Company's operations and communities in which we operate, dependence on key management personnel, Toronto Stock Exchange ("TSX") and Australian Securities Exchange ("ASX") listing compliance requirements, potential conflicts of interest involving the Company's directors and officers, corruption and bribery, limitations inherent in the Company's insurance coverage, labour relations, increasing input costs such as those related to sulphuric acid, electricity, fuel and supplies, increasing inflation rates, competition in the mining industry including but not limited to competition for skilled labour, risks associated with joint venture partners and non-controlling shareholders or associates, the Company's ability to integrate new acquisitions and new technology into the Company's operations, cybersecurity threats, legal proceedings, the volatility of the price of the common shares, the uncertainty of maintaining a liquid trading market for the common shares, risks related to dilution to existing shareholders if stock options or other convertible securities are exercised, the history of Capstone Copper with respect to not paying dividends and anticipation of not paying dividends in the foreseeable future and sales of common shares by existing shareholders can reduce trading prices, and other risks of the mining industry as well as those factors detailed from time to time in the Company’s interim and annual financial statements and MD&A of those statements and Annual Information Form, all of which are filed and available for review under the Company’s profile on SEDAR+ at www.sedarplus.ca. Although the Company has attempted to identify important factors that could cause the Company's actual results, performance or achievements to differ materially from those described in the Company's forward-looking statements, there may be other factors that cause the Company's results, performance or achievements not to be as anticipated, estimated or intended. There can be no assurance that the Company's forward-looking statements will prove to be accurate, as the Company's actual results, performance or achievements could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on the Company's forward-looking statements.

COMPLIANCE WITH NI 43-101

Unless otherwise indicated, Capstone Copper has prepared the technical information in this document ("Technical Information") based on information contained in the technical reports, Annual Information Form and news releases (collectively the "Disclosure Documents") available under Capstone Copper’s company profile on SEDAR+ at www.sedarplus.ca. Each Disclosure Document was prepared by or under the supervision of a qualified person (a "Qualified Person") as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators ("NI 43-101"). Readers are encouraged to review the full text of the Disclosure Documents which qualifies the Technical Information. Readers are advised that Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. The Disclosure Documents are each intended to be read as a whole, and sections should not be read or relied upon out of context. The Technical Information is subject to the assumptions and qualifications contained in the Disclosure Documents.

Disclosure Documents include the National Instrument 43-101 technical reports titled "Mantoverde Mine, NI 43-101 Technical Report and Feasibility Study, Atacama Region, Chile" effective July 1, 2024, "Santo Domingo Project, NI 43-101 Technical Report and Feasibility Study Update, Atacama Region, Chile" effective July 31, 2024, "NI 43-101 Technical Report on the Cozamin Mine, Zacatecas, Mexico" effective January 1, 2023, "Mantos Blancos Mine NI 43-101 Technical Report Antofagasta / Región de Antofagasta, Chile" effective November 29, 2021, and "NI 43-101 Technical Report on the Pinto Valley Mine, Arizona, USA" effective March 31, 2021.

The disclosure of Scientific and Technical Information in this document was reviewed and approved by Peter Amelunxen, P.Eng., Senior Vice President, Technical Services (technical information related to project updates at Santo Domingo and Mineral Resources and Mineral Reserves at Mantoverde), Clay Craig, P.Eng., Director, Mining & Strategic Planning (technical information related to Mineral Reserves at Pinto Valley and Cozamin), and Cashel Meagher, P.Geo., President and Chief Operating Officer (technical information related to Mineral Reserves and Resources at Mantos Blancos) all Qualified Persons under NI 43-101.

Non-GAAP and Other Performance Measures

The Company uses certain performance measures in its analysis. These Non-GAAP performance measures are included in this MD&A because these statistics are key performance measures that management uses to monitor performance, to assess how the Company is performing, and to plan and assess the overall effectiveness and efficiency of mining operations. These performance measures do not have a standard meaning within IFRS Accounting Standards and, therefore, amounts presented may not be comparable to similar data presented by other mining companies. These performance measures should not be considered in isolation as a substitute for measures of performance in accordance with IFRS Accounting Standards.

Some of these performance measures are presented in Highlights and discussed further in other sections of the MD&A. These measures provide meaningful supplemental information regarding operating results because they exclude certain significant items that are not considered indicative of future financial trends either by nature or amount. As a result, these items are excluded from management assessment of operational performance and preparation of annual budgets. These significant items may include, but are not limited to, restructuring and asset impairment charges, individually significant gains and losses from sales of assets, share-based compensation, unrealized gains or losses, and certain items outside the control of management. These items may not be non-recurring. However, excluding these items from GAAP or Non-GAAP results allows for a consistent understanding of the Company's consolidated financial performance when performing a multi-period assessment including assessing the likelihood of future results. Accordingly, these Non-GAAP financial measures may provide insight to investors and other external users of the Company's consolidated financial information.

C1 Cash Costs Per Payable Pound of Copper Produced
C1 cash costs per payable pound of copper produced is a measure reflective of operating costs per unit. C1 cash costs is calculated as cash production costs of metal produced net of by-product credits and is a key performance measure that management uses to monitor performance. Management uses this measure to assess how well the Company’s producing mines are performing and to assess the overall efficiency and effectiveness of the mining operations and assumes that realized by-product prices are consistent with those prevailing during the reporting period.

All-in Sustaining Costs Per Payable Pound of Copper Produced
All-in sustaining costs per payable pound of copper produced is an extension of the C1 cash costs measure discussed above and is also a non-GAAP key performance measure that management uses to monitor performance. Management uses this measure to analyze margins achieved on existing assets while sustaining and maintaining production at current levels. Consolidated All-in sustaining costs includes sustaining capital and corporate general and administrative costs.

Net debt / Net cash
Net (debt) / Net cash is a non-GAAP performance measure used by the Company to assess its financial position and is composed of Long-term debt (excluding deferred financing costs and purchase price accounting ("PPA") fair value adjustments), Cost overrun facility from MMC, Cash and cash equivalents, Short-term investments, and excluding shareholder loans.

Attributable Net debt / Net cash
Attributable net (debt) / net cash is a non-GAAP performance measure used by the Company to assess its financial position and is calculated as net debt / net cash excluding amounts attributable to non-controlling interests.

Available Liquidity
Available liquidity is a non-GAAP performance measure used by the Company to assess its financial position and is composed of RCF credit capacity, the $520 million Mantoverde DP facility capacity, Cash and cash equivalents and Short-term investments. For clarity, Available liquidity does not include the Mantoverde $60 million cost overrun facility from MMC nor the $260 million undrawn portion of the gold stream from Wheaton related to the Santo Domingo development project as they are not available for general purposes.

Adjusted net income attributable to shareholders
Adjusted net income attributable to shareholders is a non-GAAP measure of Net income (loss) attributable to shareholders as reported, adjusted for certain types of transactions that in the Company's judgment are not indicative of normal operating activities or do not necessarily occur on a regular basis.

EBITDA
EBITDA is a non-GAAP measure of net income (loss) before net finance expense, tax expense, and depletion and amortization.

Adjusted EBITDA
Adjusted EBITDA is non-GAAP measure of EBITDA before the pre-tax effect of the adjustments made to net income (loss) (above) as well as certain other adjustments required under the RCF agreement in the determination of EBITDA for covenant calculation purposes.

The adjustments made to Adjusted net income attributable to shareholders and Adjusted EBITDA allow management and readers to analyze the Company's results more clearly and understand the cash-generating potential of the Company.

Sustaining Capital
Sustaining capital is expenditures to maintain existing operations and sustain production levels. A reconciliation of this non-GAAP measure to GAAP segment MPPE additions is included within the mine site sections of this document.

Expansionary Capital
Expansionary capital is expenditures to increase current or future production capacity, cash flow or earnings potential. A reconciliation of this non-GAAP measure to GAAP segment MPPE additions is included within the mine site sections of this document.

Realized copper price (per pound)
Realized price per pound is a non-GAAP ratio that is calculated using the non-GAAP measures of revenue on new shipments, revenue on prior shipments, and pricing and volume adjustments. Realized prices exclude the stream cash effects as well as treatment and refining charges. Management believes that measuring these prices enables investors to better understand performance based on the realized copper sales in the current and prior periods.

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Contacts

Daniel Sampieri, Vice President, Investor Relations
437-788-1767
dsampieri@capstonecopper.com

Michael Slifirski, Director, Investor Relations, APAC Region
(+61) 412-251-818
mslifirski@capstonecopper.com

Claire Stirling, Manager, Investor Relations
416-831-8908
cstirling@capstonecopper.com