Tillkännagivande • Jun 10
Sigma Lithium Corporation Wins in State Court of Minas Gerais and Announces Overturn of Unwarranted Local Judge Decision Sigma Lithium Corporation announces that a Court of Appeal Judge in the the Court of Justice of Minas Gerais state (“Court of Justice”) overturned a local lower court decision that included the potential for a legal collateral of USD 10 million, as detailed in the Company’s announcement of May 18, 2026. The Court of Justice asked the Company to fund the engagement of an independent technical advisory firm to monitor the impacts of Sigma Lithium operations on the residents of the local municipalities of Araçuaí and Itinga. The Company welcomed the requirement of the impact assessment study as an excellent opportunity to establish the facts of the matter through an independent evaluation. Sigma Lithium’s legal counsel highlighted the discrepancy between the data presented by the prosecution and the evidence submitted by the Company in its defense. On June 2, Sigma Lithium publicly disclosed 12 months of environmental monitoring data, independently collected and verified by external experts through May 2026, demonstrating the Company’s environmental performance and track record: low levels of dust, vibrations, noise, monitored in four neighbouring communities. Dust: Sigma Lithium operates 560% better than recommended standards for total suspended particles, 350% better for particles of below 2.5 micrometers. Noise: 95 measurement campaigns conducted during night and day demonstrated compliance with Brazilian established standards. Vibrations: The level of vibrations measured in terms of velocity measured in millimeters per second against the frequency measured in Hertz was extremely low, barely registering on the seismograph scale, when set against the recommended limits. Tillkännagivande • Jun 03
Sigma Lithium Files One Year of External Expert Environmental Data Demonstrating Low Levels of Dust, Vibrations, and Noise Sigma Lithium filed one year of external expert environmental data (for the 12 months to May 2026) demonstrating its track record: low levels of dust, vibrations, noise, monitored in four neighbouring communities. Dust: Sigma Lithium operates 560% better than recommended standards for total suspended particles, 350% better for particle size of below 2.5 micrometers. Noise: 95 measurement campaigns conducted during night and day demonstrated compliance with ABNT standards. Vibrations: The level of vibrations measured in terms of velocity measured in millimeters per second against the frequency measured in Hertz were extremely low, barely registering on the seismograph scale, when set against the ABNT limits. The data series externally collected by experts provides transparent, objective evidence of Sigma Lithium's environmental track record. The evidence filed directly refutes baseless and unproven claims against the Company made in local Brazilian courts, currently under appeal at the State Courts in Minas Gerais (Tribunal de Justiça de Minas Gerais). The data points are below the stringent legal limits in Brazil, as well as the established standards of the Brazilian Technical Standards Association ("Associacao Brasileira de Normas Tecnicas" or "ABNT") and Brazil's National Environmental Council ("Conselho Nacional do Meio Ambiente" or "CONAMA"). Tables 1, 2, and 3 show data with respect to the monitoring of dust. Data is presented for the twelve months to May 2026 showing total suspended particles and particle size below 10 and 2.5 micrometers measured in four locations in the community (C1, C2, C3, and C4). The data shows that the levels of dust generated by Sigma Lithium's operations were 350% to 560% below the CONAMA standard limits established for each category. Table 4 shows the level of vibration measured in the twelve months to May 2026 in terms of velocity measured in millimeters per second against the frequency measured in Hertz. The vibrations (marked by "X" in the chart) are extremely low, when set against the ABNT limits shown in the red line. Table 5 shows the results of noise monitoring in the twelve months to May 2026 that measures compliance with ABTN limits in terms of decibels at four locations. The chart includes a data set for daytime monitoring and another for nighttime monitoring. Tillkännagivande • Mar 05
Sigma Lithium Corporation to Report Q4, 2025 Results on Mar 30, 2026 Sigma Lithium Corporation announced that they will report Q4, 2025 results Pre-Market on Mar 30, 2026 Tillkännagivande • Feb 04
Sigma Lithium Highlights the Issuance of an Official Technical Statement Declaring the Safety of Its Waste Piles by Brazil's National Mining Agency Sigma Lithium Corporation highlights the issuance of a publicly disseminated official technical statement ("Statement") by Brazil's mining industry regulator, Agencia Nacional de Mineracao ("ANM" or "Mining Regulator"), explicitly attesting the safety of Sigma Lithium's waste piles. The Statement was issued following the abovementioned inspections of Sigma Lithium's mining operations by the Mining egulator on January 20. The swift action by the Mining Regulator to conduct the inspections and issue a technical opinion regarding the Company's waste piles underscores the official effort by the Government of Brazil to protect the legal security and certainty for companies with mining activities in the country, underscoring the strong governance of the industry in Brazil. The Statement dispelled false information with respect to the Company's waste piles disseminated illegally in a negative media campaign against Sigma Lithium, which included the falsification of a Brazilian government web domain as well as Brazilian government communications (through phishing, using false domains versus the official ".gov.br"). As stated in a press release issued by Sigma Lithium on January 23, the Company's management does not consider that the ongoing administrative enquiry with respect to certain of the Company's waste piles ("Enquiry") by the Brazilian Ministry of Labor and Employment ("Ministry") has a material effect on Sigma Lithium's capacity to continue to execute its mining activities underway. Therefore, the Company's management considered the Enquiry as not constituting material information when it was initiated last year, and this remains the case. In December 2025, the Ministry conducted a regular safety and health inspection at Sigma Lithium, when it had the opportunity to verify the Company's impeccable safety records, with over 2 years without labor accidents with lost time. Following the visit, the Ministry opened the Enquiry. The issuance of the Statement by the Mining Regulator, which unequivocally confirms the safety of Sigma Lithium's waste piles, subsidizes the interactions of the Company with the Ministry with respect to the Enquiry. Sigma Lithium has maintained continuous dialogue and collaboration with the Ministry, providing all the necessary documents, technical reports, data collection sources and other requested information, demonstrating the full compliance of its operations with applicable rules and regulations. Sigma Lithium believes that the timely involvement of the Mining Regulator supports the Company's clarification to the Ministry that its "waste piles" are, in fact, hard schist rock mined from the pits and are a common feature of most base metals' operations with host mineral rocks and contact zones. These hard rock piles have been routinely confused with "tailings piles" of lithium fines, which are less common in lithium operations globally, as few companies have deployed Sigma Lithium's green technology for dry stacking (not utilizing dams). The Company has been able to sell and generate substantial demand for these dry stacked lithium fines because their lithium crystal particles are kept intact after processing by Sigma Lithium's Greentech Industrial Plant. These sales proceeds are an "environmental bonus" that is being reinvested in the operations of the Company, resulting from its clean Dense Media Separation technology that does not utilize chemical reagents to segregate the lithium crystal particles from its host rock to produce lithium oxide concentrate. The overall disinformation in the marketplace about the Enquiry and Company's "piles" has created significant volatility in Sigma Lithium's share price and, in the Company's opinion, it is very clearly the result of an ongoing well-orchestrated and well-funded defamatory campaign to confuse market participants, including investors, banks, newswires and even renowned expert opinion makers, such as research analysts at Bank of America, a thought-leader global financial institution (that has historically provided strategic advice to Sigma Lithium). The Company is in close contact with the appropriate authorities, including FINRA (US Securities and Exchange Commission), regarding these events. Tillkännagivande • Jan 23
Sigma Lithium Corporation Announces the Sale of an Additional 100,000 Tonnes of High Purity Lithium Fines Sigma Lithium Corporation announced the sale of an additional 100,000 tonnes of high purity lithium fines. Sigma Lithium reiterates that the remobilization of the contractor for equipment and personnel at the site of its mine is proceeding as planned and is expected to conclude in January 2026. The Company vigorously denied as "fake news" the inaccurate recent media reports that incorrectly denominated as an "operational injunction" an administrative process initiated by the Ministry of Labor and Employment. Sigma Lithium also states as categorically incorrect the media reports speculating about the status of the safety of its waste piles because of this administrative process, which does not represent a material event. The Company concluded the sale of 100,000 tonnes of high quality lithium fines stored at the Port of Vitoria at market prices (based on Shanghai Metals Market "SMM" index). The price was equivalent to an adjusted net final price of USD 140/t for 1% of lithium oxide content (currently priced by SMM at USD 195/t for 1.35%). The Company is now constructing a second plant to double its production capacity. 
