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COMMITMENTS AND CONTINGENCIES: | 6 Months Ended
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Jun. 30, 2026
COMMITMENTS AND CONTINGENCIES: |
COMMITMENTS AND CONTINGENCIES: | ​ NOTE 10 — COMMITMENTS AND CONTINGENCIES: ​ Environmental matters: ​ The Company has established comprehensive environmental conservation programs at its mining facilities in Peru and Mexico. The Company’s environmental programs include water recovery systems to conserve water and minimize the impact on nearby streams, reforestation programs to stabilize the surface of the tailings dams and the implementation of scrubbing technology in the mines to reduce dust emissions, among others. ​ Environmental capital investments in the six-month periods ended June 30, 2026 and 2025 were as follows (in millions):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ ​ ​ | 2026 | ​ ​ ​ | 2025
Peruvian operations | ​ | $ | 4.6 | ​ | $ | 6.9
Mexican operations | ​ |  | 133.5 | ​ |  | 84.2
​ | ​ | $ | 138.1 | ​ | $ | 91.1
​ Peruvian operations: The Company’s operations are subject to applicable Peruvian environmental laws and regulations. The Peruvian government, through the Ministry of the Environment (“MINAM”) conducts annual audits of the Company’s Peruvian mining and metallurgical operations. Through these environmental audits, matters relating to environmental and legal compliance, atmospheric emissions, effluent monitoring and waste management are reviewed. The Company believes that it is in material compliance with applicable Peruvian environmental laws and regulations. Peruvian law requires that companies in the mining industry provide assurances for future mine closure and remediation. In accordance with the requirements of this law, the Company’s closure plans were approved by MINEM. See Note 8 “Asset retirement obligation” for further discussion of this matter. ​ Air Quality Standards (“AQS”): In June 2017, MINAM enacted a supreme decree which defined new AQS for daily sulfur dioxide in the air. As of June 30, 2026, the Company reported a daily average level of µg/m3 of SO2, which falls below the AQS requirement. ​ In November 2023, MINAM enacted a new AQS for Cadmium, Arsenic and Chromium in particulate matter less than ten microns (PM10). A review of the Company´s chemical monitoring results has determined that the Company´s operations will not be significantly impacted by the new standards and concentration values in place. The Company´s results are expected to continue to fall below regulatory AQS. ​ Soil Environmental Quality Standards (“SQS”): In 2013, the Peruvian government enacted Soil Quality Standards. In accordance with the regulatory requirements of the law, the Company prepared Soil Decontamination Plans (“SDP”) for environmentally impacted sites at each of its operation units (Toquepala, Cuajone and Ilo) with the assistance of consulting companies. The costs of these SDPs are not material, either individually or in aggregated form, for the financial statements of the Company. ​ Climate change: On April 17, 2018, the Peruvian government enacted Law N. 30754, which promotes public and private investments in climate change management and establishes a Climate Change Framework. The law proposes creating an institutional framework to address climate change in Peru and outlines new measures for climate change mitigation, such as provisions to address an increase in carbon capture and use of carbon sinks; afforestation and reforestation practices; land use changes; sustainable systems of transportation, solid waste management, and energy systems. This climate change framework law incorporates obligations from the Paris Agreement. Supreme Decree 013-2019 published on December 31, 2019, enacted statutory regulations, which are applicable to all Peruvian institutions and agencies. It is expected that additional Peruvian regulations will be applicable to non governmental entities. However, no carbon pricing mechanism is currently applicable to the Company’s operations in Peru. ​ Mexican operations: The Company’s operations are subject to applicable Mexican federal, state and municipal environmental laws, to Mexican official standards, and to regulations for the protection of the environment, including regulations relating to water supply, water quality, air quality, noise levels and hazardous and solid waste. ​ The principal legislation applicable to the Company’s Mexican operations is the Federal General Law of Ecological Balance and Environmental Protection (the “General Law”), which is enforced by the Federal Bureau of Environmental Protection (“PROFEPA”). PROFEPA monitors compliance with environmental legislation and enforces Mexican environmental laws, regulations and official standards. It may also initiate administrative proceedings against companies that violate environmental laws, which in the most extreme cases may result in the temporary or permanent shutdown of non-complying facilities, the revocation of operating licenses and/or other sanctions or fines. Amendments to the General Law enacted in 2011 enabled individuals or entities to contest administrative acts, including environmental authorizations, permits or concessions granted, without the need to demonstrate the existence of harm to the environment as long as it can be argued that harm may be caused. Additionally, in 2013, the Environmental Liability Federal Law was enacted, establishing general guidelines for actions considered likely to cause environmental harm. ​ Guaymas sulfuric acid spill: In July 2019, there was an incident at the Company´s Marine Terminal in Guaymas, Sonora, that caused the discharge of approximately three cubic meters of sulfuric acid into the sea in the industrial port area. PROFEPA, after two inspections, declared a partial shutdown of the storage process and transportation of sulfuric acid at the terminal arguing the absence of an authorization of environmental impact, despite the fact that the Company’s exempt to the permit because these facilities have been in operation since 1979, prior to the 1988 Mexican General Law of Ecological Balance and the Protection of the Environment. The Company has solved this issue and expects to restart operations in the future. ​ Climate change: Several taxes are applicable to the Company’s mining operations in Mexico, including federal and state fossil fuel taxes, and the requirements associated with Mexico’s emission trading scheme. These taxes range from $9/tCO2 to $18/tCO2 in 2023, approximately. These regional taxes are applicable in the States of Baja California, Zacatecas and San Luis Potosí, as well as a federal tax linked to the import of fuels. In addition, an emission trading scheme (ETS) in Mexico is currently available to the Company which is only applicable to two business units, the metallurgic and lime plants in Sonora, which both generate annual GHG emissions levels above the threshold of 100,000 tCO2 per year contemplated by the scheme. These two units are required to report and verify their emissions once a year. Units that emit more than 25,000 tonnes CO2 equivalent per year (all of our Mexican units) are required to report their emissions to the National Emissions Registry (RENE) annually and to verify the reported emissions every three years. Total expenses to ensure annual compliance with climate change regulations in Mexico are not material to the Company. ​ On May 9, 2023, Mexican Congress approved several changes effective immediately to the Mining Law, National Waters Law, the General Law of Ecological Balance and Environmental Protection, and the General Law for the Prevention and Integral Management of Waste. The main changes include reducing mining concession terms from 50 to 30 years; new restrictions and conditions on water use; requirements to provide guarantees for closure and remediation of operations; and a contribution of 5% of net earnings to indigenous communities for new projects and significant changes to exploration rules. ​ These amendments to the law have been challenged and are being reviewed by the Supreme Court. The Company is not expecting any negative impacts on its operations. ​ The Company believes that all of its facilities in Peru and Mexico are in material compliance with environmental, mining and other applicable laws and regulations. The Company also believes that continued compliance with environmental laws of Mexico and Peru will have no material adverse effects on the Company’s business, properties, or operating results. ​ Litigation matters: ​ Peruvian operations: ​ Peruvian Labor Shares ​ In 1996, Edgardo García Ataucuri and other former employees filed a lawsuit against the Company seeking the delivery of “labor shares” (acciones laborales), which were issued by the Peruvian Branch pursuant to the legal requirements of a Peruvian Law issued in 1979 (which has since been repealed), which mandated that mining workers receive a 10% share of their employer enterprises’ pre-tax profits. This participation was distributed 40% in cash and 60% in equity interest in the enterprise. The Twenty-Second Civil Court of Lima ruled in favor of the plaintiffs and ordered the delivery of labor share certificates. The ruling was upheld by the Civil Chamber Court in 2000 and by the Supreme Court in 2009. ​ The proceedings are currently in the judgment execution stage. The Court ordered a registered lien on 10,501,857 “investment shares” (formerly referred to as “Labor Shares”) held by the Peruvian Branch and by its Peruvian affiliate, Compañía Minera Los Tolmos S.A. ​ On September 16, 2025, the First Civil Court of Lima issued Resolution No. 686, ordering the initiation of a transfer in payment through the registration of a transfer of ownership of labor shares, now referred to as investment shares, involving 8,488,383 shares. The Company subsequently challenged Resolution No. 686 by filing a motion for nullity. On December 19, 2025, the First Civil Court dismissed that motion through Resolution No. 736. However, upon the Company's appeal, the Superior Court annulled Resolution No. 736, leaving the Company's challenge to Resolution No. 686 yet to be resolved. ​ In addition to the motions filed in the underlying proceedings, the Company filed a constitutional amparo action challenging the Court's interpretation of the value of the labor share (according to the Company's position, it is incorrect to treat a labor share as equivalent in value to a current investment share, given that the applicable conversion ratio is actually 10,000,000 labor shares for one current investment share). On February 11, 2026, the Ninth Constitutional Court of Lima issued Resolution No. 4 in Case No. 11956-2025-0-1801-JR-DC-09, declaring the amparo claim well-founded for failing to provide adequate grounds and reasoning. Accordingly, the Court declared null and void the resolutions issued in the civil enforcement proceedings, namely: (i) Resolution No. 505 (September 23, 2015), (ii) Resolution No. 518 (October 23, 2015), and (iii) Resolution No. 08 (May 16, 2025), which ordered the attachment by registration over shares held by Compañia Minera Los Tolmos S.A. and the Peruvian Branch and had served as the basis for the subsequent order requiring the delivery of the investment shares. The Company then requested the immediate enforcement of the first-instance judgment. On February 24, 2026, the Constitutional Court granted that request through Resolution No. 01 and ordered the First Civil Court of Lima, on a provisional basis, to refrain from implementing any registration, transfer, or change-of-ownership measures arising from the attachment ordered by Resolutions No. 505 and No. 518 and Appellate Resolution No. 08. Furthermore, on February 24, 2026, the Company was served notice of the appeal that the defendant filed against Resolution No. 4. As of June 30, 2026, the case was pending resolution. ​ On March 3, 2026, the First Civil Court was officially served with the judgment issued by the Ninth Constitutional Court. Subsequently, on April 8, 2026, through Resolution No. 846, the First Civil Court informed the parties that, in strict compliance with the order requiring it to refrain from taking certain actions, it would suspend any procedural activity based on those rulings. Accordingly, the Court suspended the implementation of Resolution No. 686, specifically the issuance and transmission of the instructions to transfer ownership of the shares attached pursuant to Resolutions No. 505 and No. 518 and Appellate Resolution No. 08. This suspension was ordered on a provisional basis and would remain in effect for as long as Resolution No. 01 issued in Case No. 11956-2025-81-JR-DC-09 by the Ninth Constitutional Court remained in force. ​ The Tia Maria Mining Project ​ There are eight lawsuits filed against the Peruvian Branch of the Company related to the Tia Maria project. The lawsuits seek (i) to declare null and void the resolution that approved the Environmental Impact Assessment of the project; (ii) the cancellation of the project and the withdrawal of mining activities in the area; (iii) to annul the mining concession application for the Tia Maria project; (iv) to annul the resolution that approved the construction license; (v) to suspend construction work on the project; and (vi) to declare the expiration of the Environmental Impact Assessment. The lawsuits were filed by Messrs. Ernesto Mendoza Padilla (filed May 26, 2015), Juan Alberto Guillen Lopez (filed June 18, 2015), Junta de Usuarios del Valle del Tambo (filed April 30, 2015), Gobierno Regional de Arequipa (filed December 16, 2019), Municipalidad Distrital de Dean Valdivia (filed January 24, 2020), Cristhian Torres Quispe et al. (filed March 20, 2025), Juan Miguel Meza Igme et al. (filed March 28, 2025) and Néstor Eloy Arocena Canazas (filed December 02, 2025). ​ It should be noted that the Supreme Court of Justice of Peru has already issued a final ruling on the Carpio Lazo case challenging the approval of the Environmental Impact Assessment (EIA) of the Tía Maria project (notified on February 22, 2022), which ratified the legality of said Environmental Impact Assessment. The Judiciary recognized SPCC's strict compliance with all applicable environmental regulations during the approval stages of the Tía María EIA. This decision should have a favorable impact on the cases described below: ​ The Mendoza Padilla case was initially rejected by the lower court on July 8, 2015. This ruling was confirmed by the Superior Court on June 14, 2016. On July 12, 2016, the case was appealed before the Constitutional Court. On November 20, 2018, the Constitutional Court reversed the previous decisions and remanded the case to the lower court for further action. In the third quarter of 2020, the Company was notified that the complaint had been reinstated. The Company answered the complaint on September 15, 2020. On December 2, 2020, the lower court issued a resolution, considering the complaint answered. On September 27, 2021, the Court ordered to temporarily archive the case. As of June 30, 2026, the case was pending resolution. ​ The Guillen Lopez case is currently before the lower court. Oral arguments took place on July 19, 2019. On January 7, 2020, the Judge decided to suspend the proceedings until the del Carpio Lazo case is concluded. On March 8, 2022, The Peruvian Branch informed the Court that the del Carpio Lazo case had concluded. On September 7, 2023, the Judge cancelled the suspension and declared the case ready for a resolution. On May 18, 2024, the Judge declared, once again, that the case was ready for resolution. As of June 30, 2026, the case was pending resolution. ​ The Junta de Usuarios del Valle del Tambo case is currently before the lower court. In May 2016, the Company was included in the process after the Ministry of Energy and Mines filed a civil complaint. On March 6, 2019, the Company was formally notified of the lawsuit and answered the complaint on March 20, 2019. On July 8, 2019, the Company requested the suspension of the proceeding until the del Carpio Lazo case is concluded. On March 11, 2022, the Peruvian Branch informed the Court that the del Carpio Lazo case had concluded. On January 5, 2024, the Peruvian Branch reiterated its petition to continue the process given that a final decision has already been handed down in Carpio Lazo case. As of June 30, 2026, the case was pending resolution. ​ The Gobierno Regional de Arequipa case is currently before the Superior Court. The Company answered the complaint on September 15, 2020. On March 15, 2023, the Judge dismissed the lawsuit. On May 30, 2025, the Superior Court vacated the dismissal and remanded for a new judgment. On January 23, 2026, the lower court again ruled in favor of SPCC. On May 5, 2026, the Superior Court affirmed the first instance decision dismissing the lawsuit. However, on June 4, 2026, the plaintiff filed an extraordinary appeal (recurso de casación). On June 16, 2026, the Superior Court ordered that the case file be forwared to the Supreme Court for resolution of the extraordinary appeal. As of June 30, 2026, the case was pending resolution. ​ The Municipalidad Distrital de Dean Valdivia case is currently before the lower court. On August 17, 2022, the Company was formally notified of the lawsuit and answered the complaint on September 2, 2022. The Peruvian Branch informed the Court the result of the del Carpio Lazo case. On May 19, 2026, the Judge dismissed the lawsuit. The deadline for the plaintiff to appeal that decision is currently pending expiration. As of June 30, 2026, the case was pending resolution. ​ The Torres Quispe case is currently before the lower court. On May 20, 2025, the Company was formally served with the lawsuit and filed and answered the complaint on June 2, 2025. On July 11, 2025, the Court ruled in favor of SPCC. The plaintiff filed an appeal. On April 24, 2026, the Superior Court affirmed the final ruling Therefore, as of June 30, 2026, the case is closed. ​ The Juan Miguel Meza Igme case is currently before the lower court. On August 28, 2025, SPCC was formally served with the lawsuit. On September 10, 2025, the Company answered the complaint. As of June 30, 2026, the case was pending resolution. ​ The Néstor Eloy Arocena Canazas case is currently before the lower court. On March 4, 2026, the Company was formally served with the complaint and filed its answer on March 18, 2026. As of June 30, 2026, the case was pending resolution. ​ The Company asserts that these lawsuits are without merit and is vigorously defending against them. The potential contingency amount for these cases cannot be reasonably estimated by management at this time. ​ Special Regional Pasto Grande Project (“Pasto Grande Project”) ​ In 2012, the Pasto Grande Project, an entity of the Regional Government of Moquegua, filed a lawsuit against the Peruvian Branch alleging property rights over a certain area used by the Peruvian Branch and seeking the demolition of the tailings dam where the Peruvian Branch has deposited its tailings from the Toquepala and Cuajone operations since 1995. The Peruvian Branch has had title to use the area in question since 1960 and has constructed and operated the tailings dams with proper governmental authorization since 1995. Following a motion filed by the Peruvian Branch, the lower court included MINEM as a defendant in this lawsuit. MINEM has answered the complaint and denied the validity of the claim. On July 2, 2022, the case was temporarily archived. On May 26, 2023, the Judge ordered termination of the proceeding due to the lack of interest of the plaintiff. On June 2, 2023, the plaintiff appealed the termination of the proceeding. On September 18, 2023, the Superior Court reversed the termination and ordered the Judge to continue the proceeding. As of June 30, 2026, the case was pending resolution. ​ The Peruvian Branch asserts that the lawsuit is without merit and is vigorously defending against it. The amount of this contingency cannot be reasonably estimated by management at this time. ​ Mexican operations: ​ The Accidental Spill at Buenavista Mine of 2014 ​ Regarding the 2014 accidental spill of copper sulfate solution at a leaching pond in the Buenavista mine, the following legal procedures are pending against the Company: ​ On August 19, 2014, PROFEPA, as part of the administrative proceeding initiated after the spill, announced the filing of a criminal complaint against Buenavista del Cobre S.A. de C.V. (“BVC”), a subsidiary of the Company, to determine those responsible for environmental damages. During the second quarter of 2018, the criminal complaint was dismissed. This decision was appealed and was pending resolution as of June 30, 2026. ​ On October 12, 2023, the Ministry of Environment and Natural Resources (“SEMARNAT”) publicly announced the filing of another criminal complaint regarding the Sonora River spill, arguing that remediation of damages to the river was incomplete and compensation for said damages was insufficient. The Company has been directed to provide information regarding remediation activities and compensation for damages. The Company strongly believes that it has duly completed all remediation and compensation-related activities as required by the competent Mexican authorities and as such, this new complaint lacks merit. ​ Through the first half of 2015, six collective action lawsuits were filed in federal courts in Mexico City and Sonora against two subsidiaries of the Company seeking economic compensation, clean up and remedial activities in order to restore the environment to its pre-existing conditions. Three of the collective action lawsuits have been dismissed by the court. The remaining three lawsuits are still pending: two were filed by Acciones Colectivas de Sinaloa, A.C. and one, by Defensa Colectiva, A.C.; requesting precautionary measures about construction of facilities for monitoring public health services and prohibiting the closure of the Rio Sonora Trust. As of June 30, 2026, these cases remain in the same stage. ​ Similarly, during 2015, eight civil action lawsuits were filed against BVC in the state courts of Sonora seeking damages for alleged injuries and for moral damages as a consequence of the spill. The plaintiffs in the state court lawsuits are: Jose Vicente Arriola Nunez et al; Santana Ruiz Molina et al; Andres Nogales Romero et al; Teodoro Javier Robles et al; Gildardo Vasquez Carvajal et al; Rafael Noriega Souffle et al; Grupo Banamichi Unido de Sonora El Dorado, S.C. de R.L. de C.V; and Marcelino Mercado Cruz. In 2016, three additional civil action lawsuits, claiming similar damages, were filed by Juan Melquicedec Lebaron; Blanca Lidia Valenzuela Rivera et al and Ramona Franco Quijada et al. In 2017, BVC was served with thirty-three additional civil action lawsuits, claiming similar damages. The lawsuits were filed by Francisco Javier Molina Peralta et al; Anacleto Cohen Machini et al; Francisco Rafael Alvarez Ruiz et al; Jose Alberto Martinez Bracamonte et al; Gloria del Carmen Ramirez Duarte et al; Flor Margarita Sabori et al; Blanca Esthela Ruiz Toledo et al; Julio Alfonso Corral Dominguez et al; Maria Eduwiges Bracamonte Villa et al; Francisca Marquez Dominguez et al; Jose Juan Romo Bravo et al; Jose Alfredo Garcia Leyva et al; Gloria Irma Dominguez Perez et al; Maria del Refugio Romero et al; Miguel Rivas Medina et al; Yolanda Valenzuela Garrobo et al; Maria Elena Garcia Leyva et al; Manuel Alfonso Ortiz Valenzuela et al; Francisco Alberto Arvayo Romero et al; Maria del Carmen Villanueva Lopez et al; Manuel Martin Garcia Salazar; Miguel Garcia Arguelles et al; Dora Elena Rodriguez Ochoa et al; Honora Eduwiges Ortiz Rodriguez et al; Francisco Jose Martinez Lopez et al; Maria Eduwiges Lopez Bustamante; Rodolfo Barron Villa et al, Jose Carlos Martinez Fernandez et al, Maria de los Angeles Fabela et al; Rafaela Edith Haro et al; Luz Mercedes Cruz et al; Juan Pedro Montaño et al; and Juana Irma Alday Villa. In the first quarter of 2018, BVC was served with another civil action lawsuit, claiming similar damages. The lawsuit was filed by Alma Angelina Del Cid Rivera et al. On October 3, 2024, BVC was served with another civil action lawsuit, claiming similar damages. The lawsuit was filed by María Lourdes Martínez Navarro et al. As of June 30, 2026, all of these cases were pending resolution. ​ In 2015, four constitutional lawsuits (juicios de amparo) were filed before Federal Courts against various authorities and against a subsidiary of the Company, arguing; (i) the alleged lack of a waste management program approved by SEMARNAT; (ii) the alleged lack of a remediation plan approved by SEMARNAT with regard to the August 2014 spill; (iii) the alleged lack of community approval regarding the environmental impact authorizations granted by SEMARNAT to one subsidiary of the Company; and (iv) the alleged inactivity of the authorities with regard of the spill in August 2014. The plaintiffs of these lawsuits are: Francisca Garcia Enriquez, et al filed two lawsuits, Francisco Ramon Miranda, et al and Jesus David Lopez Peralta et al. In the third quarter of 2016, four additional constitutional lawsuits, claiming similar damages were filed by Mario Alberto Salcido et al; Maria Elena Heredia Bustamante et al; Martin Eligio Ortiz Gamez et al; and Maria de los Angeles Enriquez Bacame et al. In the third quarter of 2017, BVC was served with another constitutional lawsuit filed by Francisca García Enriquez et al. In 2018, BVC was served with two additional constitutional lawsuits that were filed against SEMARNAT by Norberto Bustamante et al. With regard to the constitutional lawsuit filed by Maria Elena Heredia Bustamante et al; in which it was claimed the lack of community approval regarding the authorization granted by SEMARNAT to build the new BVC tailings dam, on September 5, 2018, the Supreme Court of Justice issued a resolution establishing that such authorization was granted to BVC in compliance with the applicable legislation. However, SEMARNAT must carry out a public meeting to inform the community of the technical aspects required to build the dam, potential impacts and prevention measures. This public meeting will have no material effects to BVC’s operations. SEMARNAT has carried out the consultation ordered by the Supreme Court. As a result, it has informed the corresponding Judge about its compliance with the resolution, in which BVC was required to implement additional measures of environmental impact prevention, such as: (i) the building of at least three monitoring wells downstream from the curtain of the contingency dam in a period of six months; (ii) monitoring of the groundwater level and water quality every six months; (iii) carrying out rain collection work in order to restore water to the Sonora River basin, with six months granted to present the execution program; (iv) determine the location of wildlife conservation and protection areas and define the need to establish biological corridors; (v) obtain photographic or videographic evidence every six months; (vi) submitting to SEMARNAT two years before the closure and abandonment of the site, or earlier if necessary, the closure program that includes the cleaning and restoration of the soil including Mexican regulation NOM-141; (vii) include the measures in the Environmental Monitoring Program according to the environmental components impacted; and (viii) hiring an external environmental consultant to validate compliance with the current and new conditions imposed. The foregoing does not impact BVC’s operations. Additionally, the lawsuits filed by Maria de los Angeles Enriquez Bacame and Norberto Bustamante have been dismissed and closed without prejudice to the Company. As of June 30, 2026, the remaining cases were pending resolution. ​ It is currently not possible to determine the extent of the damages sought in these state and federal lawsuits but the Company believes that these lawsuits are without merit. Accordingly, the Company is vigorously defending against them. Nevertheless, the Company believes that none of the legal proceedings resulting from the spill, individually or in the aggregate, would have a material effect on its financial position or results of operations. ​ Labor matters: ​ Peruvian operations: Approximately 49.2% of the Company's 5,643 Peruvian employees were unionized as of June 30, 2026. Currently, there are six separate unions, none of which represents the majority of workers, as defined by current Peruvian labor legislation. ​ In the fourth quarter of 2024, the Company signed long-term extensions of the collective bargaining agreements with five of its six unions, each lasting six years and commencing on the day after the expiration of the prior agreements, in accordance with the law. As a result of these agreements, the Company made a signing payment to each worker in the fourth quarter of 2024, totaling $62 million, approximately. ​ In February 2025, the Company signed a three-year extension of the collective bargaining agreement with the remaining union. The Company made a signing payment to each worker of the union, totaling approximately $6.3 million. This allows the Company to ensure that economic benefits and working conditions are consistently applied to all unionized workers. Additionally, the Company reached agreements with the six unions to ensure uninterrupted operation of its facilities, preventing stoppages by the unions and workers during extension periods for collective bargaining. ​ In the second quarter of 2025, the Company began implementing of the collective bargaining agreements signed with the six unions. Meetings have been held with the unions to execute different points that were agreed upon during the collective bargaining, and those additional agreements to ensure that operations can develop normally until at least 2027. ​ The Company maintains regular dialogue with union representatives to ensure labor harmony and proper management of labor relations. Southern Peru has collective bargaining agreements with each of the six unions, the earliest of which expires in 2027 and the latest, in 2033. These agreements regulate benefits related to compensation and working conditions. ​ Mexican operations: In recent years, the Mexican operations have experienced a positive improvement in their labor environment, as workers opted to change their affiliation from the Sindicato Nacional de Trabajadores Mineros, Metalurgicos y Similares de la Republica Mexicana (the “National Mining Union”) to other less politicized unions. The workers of the San Martin mine were on strike since July 2007. On February 28, 2018, the striking workers of the San Martín mine of IMMSA held an election to vote on the union that would hold the collective bargaining agreement at the San Martin mine. The Federacion Nacional de Sindicatos Independientes (the National Federation of Independent Unions) won the vote by a majority. Nevertheless, the vote was challenged by the National Mining Union. On June 26, 2018, the Federal Mediation and Arbitration Board issued a ruling recognizing the election results. Due to the agreement between workers and the Company to end the protracted strike, on August 22, 2018, the Federal Mediation and Arbitration Board authorized the restart of operations of the San Martin mine. Such authorization was challenged by the National Mining Union. On April 4, 2019, the Federal Mediation and Arbitration Board recognized, once again, the election results from February 28, 2018, by which the National Federation of Independent Unions won by a majority. In the last quarter of 2019, a Federal Court issued a resolution that established that the Labor Court should analyze the list of workers with the right to vote in the union election. The Company and the National Federation of Independent Unions challenged such determination before the Supreme Court of Justice. Such challenges were dismissed by the Supreme Court. Consequently, on September 6, 2021, the Federal Mediation and Arbitration Board issued a new resolution determining that, based on the documents submitted by the National Federation of Independent Unions and given the status of the strike until 2018, it was not possible to create a registry of workers holding a right to vote. Therefore, in case of a strike, any collective bargaining proceedings shall remain suspended. On June 9, 2023, the Federal Mediation and Arbitration Board, in a ruling that veered from its previous stance, did not recognize the common representatives of the coalition workers and consequently ruled that the agreement which such representatives had made with the Company to lift the strike in 2018 lacked validity. Notwithstanding, on June 14, 2023 the Federal Mediation and Arbitration Board handed down a ruling that terminated the strike and ordered workers to resume activities within 15 days. The Mining Union filed a protective action (Amparo) against this resolution, which is pending resolution as of June 30, 2026. ​ Additionally, the Mining Union filed a complaint before the Government of the United States of America under the rules of the Rapid Response Mechanism contained in the Mexico-United States-Canada Treaty (“T-MEC”), alleging denial of free association rights. On April 26, 2024, the arbitration panel of the Labor Rapid Response Mechanism ruled in favor of the Government of Mexico, determining that they did not have jurisdiction to rule on the denial of union rights at the mine. The Company collaborated by providing background information on the case and followed up every stage of the arbitration. ​ The Company´s operations at the San Martin unit continue to evolve normally and the conflict is expected to be resolved in accordance with the legal framework set by labor authorities; any actions taken will respect the will of the workers ​ In the case of the Taxco mine, its workers have been on strike since July 2007. After several legal procedures, in August 2015, the Supreme Court decided to assert jurisdiction over the case and to rule on it directly. As of June 30, 2026, the case was pending resolution without further developments. ​ It is expected that operations at the Taxco mine will remain suspended until the labor issues are resolved. In view of the lengthy strike, the Company has reviewed the carrying value of the Taxco mine to ascertain whether impairment exists. The Company concluded that there is a non-material impairment of the assets located at this mine. ​ Other legal matters: ​ The Company is involved in various other legal proceedings incidental to its operations, but the Company does not believe that decisions adverse to it in any such proceedings, individually or in the aggregate, would have a material effect on its financial position or results of operations. ​ Other commitments: ​ Peruvian Operations: ​ Michiquillay ​ In June 2018, the Company signed a contract for the acquisition of the Michiquillay copper project in Cajamarca, Peru, at a purchase price of $400 million. Michiquillay is a world-class mining project with estimated inferred mineral resources of 2,288 million tonnes and an estimated copper grade of 0.43%. It is expected to produce 225,000 tonnes of copper per year (along with by-products of molybdenum, gold and silver) for an initial mine life of more than 25 years. ​ In 2021, the Company signed social agreements with the Michiquillay and La Encañada communities. In addition, in October 2021, the Peruvian Ministry of Energy and Mines approved the semi-detailed environmental impact study for the project. In the last quarter of 2022, the Company informed MINEM that exploration activities had begun and that it initiated an in-depth assessment of existing mineral resources. In 2023, in accordance with the social agreements with the Michiquillay and La Encañada communities, the Company has hired unskilled labor and is paying for the use of surface land. The Company is supporting social programs in both communities. Additionally, the geological information obtained from drilling programs have been used by the Company to develop the models required to estimate the deposit’s mineral resources. A conceptual study is ongoing to determine the best location for a conventional and/or filtered tailings storage facility. Hydrological, hydrogeological, and geotechnical studies are also being conducted. ​ Social agreements with the Michiquillay and La Encañada communities represent an opportunity to improve quality of life for their residents through the Company´s strong social programs, backed by a solid framework for technical work at the project level. The main commitments signed by the Company regarding the social agreements are related to providing support for agricultural and livestock activities, financial support for local initiatives, and social programs in favor of education, water management, waste disposal, and healthcare for vulnerable groups. ​ As per the purchase agreement, the Company paid $12.5 million on the date of signing the Contract and $12.5 million in June 2021. The remaining balance of $375.0 million will be paid if the Company decides to develop the project. Therefore, it is not a present obligation. In June 2022, the Company notified the Peruvian authorities of the end of the suspension period and the start of the preoperational period that lasts 12 years, but can be automatically extended for three more years, provided that the Feasibility Study of the project has been approved. The start of the preoperational period does not imply a payment obligation, but the Company must support an investment of $20 million during the first five years of this period, which includes exploration activities as well as the development of social programs. ​ In April 2025, considering the challenges for the development of the Michiquillay Project, the Company entered into an agreement with the Peruvian authorities to extend the preoperational period by three additional years, without prejudice of the Company’s right to extend it for three more years, as initially established in the Contract. This extension also deferred by three years the payment term to pay the $375.0 million outstanding balance of the purchase price. The Company was required to pay $21.0 million cash consideration for this extension and commit an additional $15 million in social investments between the fourth and sixth years of the preoperational period. ​ Corporate Social Responsibility ​ The Company has a corporate social responsibility policy to maintain and promote the continuity of its mining operations while obtaining the best results. The main objective of this policy is to integrate the Company´s operations with local communities in the areas of influence of its operations by creating permanent positive relationships to develop optimum social conditions and promote sustainable development in the area. Accordingly, the Company has made the following commitments: ​ Tacna Region: In connection with the Toquepala concentrator expansion, the Company has committed to fund various social and infrastructure improvement projects in Toquepala’s neighboring communities. The total amount committed for these purposes is S/445.0 million (approximately $130.4 million as of June 30, 2026). In relation to this commitment, the Company has completed the construction of a school with an investment of S/18.8 million (approximately $5.5 million as of June 30, 2026) and agricultural infrastructure projects and studies with an investment of S/112.4 million (approximately $32.9 million as of June 30, 2026). Among the most important projects are the construction of the Cularjahuira dam for S/15.6 million (approximately $4.6 million as of June 30, 2026) and the engineering study for the Callazas dam for S/2.6 million (approximately $0.8 million as of June 30, 2026). Additionally, the Company has invested S/60.6 million (approximately $17.8 million as of June 30, 2026) to basic infrastructure projects, including a drinking water project for S/9.6 million (approximately $2.8 million as of June 30, 2026) and has committed S/1.2 million (approximately $0.4 million as of June 30, 2026) for other projects. ​ As the Toquepala expansion project was completed, the Company believes that these commitments constitute present obligations and consequently recorded a liability of $29.9 million as other liabilities as of June 30, 2026 in its condensed consolidated financial statements. ​ In addition, the Company has allocated S/102.1 million (approximately $29.9 million as of June 30, 2026) for the construction of a high-achievement school, and has allocated S/ 81.9 million (approximately $24.0 million as of June 30, 2026) for four infrastructure projects in the Tacna region under the “Works for Taxes” (obras por impuestos) program, which allows the Company to use these amounts as an advance payment of taxes. ​ Moquegua Region: In the Moquegua region, the Company participates in a “development roundtable” with local municipal authorities and community representatives to discuss social needs to determine how the Company can contribute to sustainable development in the region. Although the development roundtable is not currently meeting, during previous sessions it discussed the possibility of creating a Moquegua Region Development Fund, for which the Company has offered a contribution of S/1,000 million (approximately $293.0 million as of June 30, 2026). While the final funding agreement has yet to be signed, the Company has already committed to contributing S/258.9 million (approximately $75.9 million as of June 30, 2026) to different projects, including S/108.8 million (approximately $31.9 million as of June 30, 2026) to fund an educational project for which S/108.6 million (approximately $31.8 million as of June 30, 2026) has already been invested; this project already has approved resolutions from the provinces of Ilo and Sánchez Cerro. Additionally, construction of the treatment plant in Ilo continues and as of June 30, 2026 the project had advanced 64%, with an investment of S/112.4 million (approximately $32.9 million as of June 30, 2026). On the education front, S/18.2 million (approximately $5.3 million as of June 30, 2026) has been executed to build three schools in Moquegua, and S/5.4 million (approximately $1.6 million as of June 30, 2026) has been committed for two additional schools and for scholarship funding in Moquegua. On the agricultural front, S/6.9 million (approximately $2.0 million as of June 30, 2026) has been invested to develop two infrastructure projects. ​ In addition, the Company has allocated S/279.0 million (approximately $81.7 million as of June 30, 2026) to four educational infrastructure projects, three out of which are under execution and a new project that was entrusted to the Company in 2026. The Company has also allocated S/3.9 million (approximately $1.1 million as of June 30, 2026) to conduct pre-investment studies in the Moquegua region, all under the “Works for Taxes” (obras por impuestos) program, which allows the Company to use these amounts as an advance payment of taxes. ​ Apurimac Region: The Company has allocated S/122.7 million (approximately $36.0 million as of June 30, 2026) to build two educational infrastructure projects and one health project under the “Works for Taxes” (obras por impuestos) program, which allows the Company to use these amounts as an advance payment of taxes. ​ Arequipa Region: The Company has allocated S/308.7 million (approximately $90.4 million as of June 30, 2026) to build five educational infrastructure projects and S/6.3 million (approximately $1.8 million as of June 30, 2026) to finance previous studies for infrastructure projects, under the “Works for Taxes” (obras por impuestos) program, which allows the Company to use these amounts as an advance payment of taxes. ​ Cajamarca Region: The Company has allocated S/0.7 million (approximately $0.2 million as of June 30, 2026) to finance the pre-investment studies of a health project under the “Works for Taxes” (obras por impuestos) program, which allows the Company to use these amounts as an advance payment of taxes. ​ Power purchase agreements ​
● | Electroperu S.A.: In June 2014, the Company entered into a power purchase agreement for 120 megawatts (“MW”) with the state power company Electroperu S.A., under which Electroperu S.A. began supplying energy for the Peruvian operations for twenty years starting on April 17, 2017.
​
● | Kallpa Generacion S.A. (“Kallpa”): In July 2014, the Company entered into a power purchase agreement for 120 MW with Kallpa, under which Kallpa will supply energy for the Peruvian operations for ten years starting on April 17, 2017 and ending on April 30, 2027. In May 2016, the Company signed an additional power purchase agreement for a maximum of 80 MW with Kallpa, under which Kallpa began supplying energy for the Peruvian operations related to the Toquepala Expansion and other minor projects starting on May 1, 2017 and ending on April 30, 2029.
​
● | Orygen Perú S.A.A. (“Orygen”): In May 2026, the Company entered into a power purchase agreement for a total of 200 MW with Orygen, under which Orygen will supply energy for the Peruvian operations for ten years starting on May 1, 2027 and ending on April 30, 2037. Orygen will initially supply 120 MW of power to the Company, effective between May 1, 2027 and April 30, 2029. Beginning on May 1, 2029, and until the contract end date on April 30, 2037, the contract amount will increase to 200 MW.
​ Mexican operations: ​ Solidarity contribution for social and development programs in Sonora, Mexico: ​ In January 2026, the Board of Directors of SCC approved a voluntary and solidarity contribution of up to 1.5 billion Mexican pesos (approximately $87 million) with the aim of strengthening and supporting government plans and programs for the economic progress and wellbeing of the population of the state of Sonora, Mexico, to be made through Minera Mexico and its subsidiaries. In accordance with this, on February 9, 2026, the Company contributed 500 million Mexican pesos (approximately $29 million) to the Mexican Institute of Social Security in Sonora, Mexico. ​ Power purchase agreements ​
● | MGE: In 2012, the Company signed a power purchase agreement with MGE, an indirect subsidiary of Grupo Mexico, to supply power to some of the Company’s Mexican operations through 2032. For further information, please see Note 5 “Related party transactions”.
​
● | Eolica el Retiro, S.A.P.I. de C.V.: In 2013, the Company signed a power purchase agreement with Eolica el Retiro, S.A.P.I. de C.V., a windfarm energy producer that is an indirect subsidiary of Grupo Mexico, to supply power to some of the Company´s Mexican operations. For further information, please see Note 5 “Related party transactions”.
​
● | Parque Eolico de Fenicias, S. de R.L. de C.V.: On February 20, 2020, the Company signed a power purchase agreement with Parque Eolico de Fenicias, S. de R.L. de C.V., an indirect subsidiary of Grupo Mexico, to supply 611,400 MWh of power per year to some of the Company´s Mexican operations for 20 years. In the third quarter of 2024, Parque Eolico de Fenicias began supplying energy to the IMMSA unit. For further information, please see Note 5 “Related party transactions”.
​ ​ Corporate operations: ​ Commitment for capital projects ​ As of June 30, 2026, the Company had committed approximately $1,634.7 million to capital investment project developments. ​ Tax contingency matters: Tax contingencies are provided for under ASC 740-10-50-15 Uncertain tax position (see Note 4 “Income taxes”).

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