공시 • 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 공시 • 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. 공시 • 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. 공시 • Oct 06
Sigma Lithium Corporation Upgrades Mining Operations Targeting Higher Efficiency Sigma Lithium announced that the Company is upgrading its mining operations to increase its efficiency and competitiveness: mining operations are responsible for over 66% of Sigma Lithium´s "plant gate costs", while industrial operations represent just 33% (one of the most efficient in the lithium industry). The upgrade is part of a comprehensive review of mining operations that commenced after significant improvements were executed in the Greentech industrial plant in 4Q24. The improvements increased the plant's recovery rates and demonstrated that it would be possible to further unlock production capacity if the plant operated at a constant rate. This operational cadency could be achieved by reducing the fluctuations in the rate of delivery of fresh ore from the mining operations. Improved ore cadence is now expected to increase production at the industrial Greentech plant, while decreasing overall plant gate costs by approximately 20%. The execution of the upgrade, which will include a change in suppliers, was initially planned for Phase 2, but the Company decided that it should be started earlier, during 3Q25, in response to the decline in lithium prices from April to August 2025 and to extend Sigma Lithium's stellar health and safety standards to the mining operations. The Company aims to bridge the gap between the safety record of the mining operations and that of the industrial Greentech plant, which is excellent and one of the factors that determine Sigma Lithium´s leadership in sustainability. At the end of the second quarter of 2025, the industrial Greentech plant accumulated more than 2 years (735 days) without Lost Time Injury (LTI) and zero fatalities, positioning it amongst the safest operations according to the International Council of Metals and Mining (ICMM). As part of the upgrade, Sigma Lithium will be replacing its mining equipment. A demobilization was started last week, and a re-mobilization is planned to commence this week, when the new supplier is expected to promptly restart activities. The amount of downtime required for the switch and the resulting loss of production is being kept to a minimum, while the targeted efficiency gains are on track to being achieved: mining equipment is being modernized with an increase in the size of mining trucks, which will enable a decline in the size of the overall fleet and a reduction of traffic at the mine, enhancing mine safety. In addition to raising production capacity, the upgrade should prepare Sigma Lithium´s mine to feed a second Greentech plant more rapidly by improving mine geometry, which will help the Company deliver its planned capacity expansion scheduled to come onstream in 2026. 
