Sigma Lithium Announces Record 2Q 26 Results: EBITDA Margin of 47%, Decrease of over 30% in Costs; TAC Agreement Negotiations Underway

About this update from Sigma Lithium Corporation

FINANCIAL HIGHLIGHTS Sigma Lithium 2Q 26 delivers another record quarter of high profitability: Gross and operating margins remained high at 60% and 32% respectively. EBITDA margin at 47% was the highest in the Company's history and up from 39% in 1Q 26. Net revenues of US$55 million from the sale of 24,400t of lithium oxide concentrate Realized price of US$2,089 (SC5), up by 17% from US$1,790 in 1Q 26. Decreased costs, while upgrading mining operations, resulting from production growth to 35,400t and financial discipline Plant gate: US$401/t , (-36% from 1Q 26) CIF: US$452/t (-33% from 1Q 26) AISC: US$ 668/t All In Sustaining Costs (-6% from 1Q 26) Decreased total debt by 25% since 2Q 25. OPERATIONAL HIGHLIGHTS Expected near term conclusion of TAC Agreement and end of temporary suspension of operations. Production expansion remains on track, pushing forward ramp-up guidance by 3 months 240,000t production of lithium oxide concentrate within 12 months; 330,000t production for FY 2027 (reprocessing circuit already fully operational) Plans to increase installed industrial capacity by building two additional plants: 580,000tpy by the end of 2027 830,000tpy by the end of 2028 Conference Call Information The Company will hold a conference call to discuss its financial results for the second quarter of 2026 at 8:30a.m. ET on Friday, August 14, 2026. Register for the call at https://ir.sigmalithiumcorp.com/events Toronto, Ontario--(Newsfile Corp. - August 14, 2026) - Sigma Lithium Corporation (NASDAQ: SGML) (TSXV: SGML) (BVMF: S2GM34) ("Sigma Lithium" or the "Company"), the largest producer of lithium oxide concentrate in the Americas¹ and dedicated to industrializing lithium materials to supply global producers of batteries for energy security in a responsible manner, announces the Company's results for the three months ended June 30, 2026 and provides an update on recent developments. RECORD REVENUES AND EBITDA MARGINS In 2Q 26, Sigma Lithium achieved gross margin of 60%, maintaining high levels of 1Q26 (at 61%). EBITDA margin at 47% was the highest in the Company’s history, further improving on the 39% margin of 1Q 26. Revenues of US$55 million were also at a record high, up from US$42 million in 1Q 26. Sigma Lithium sold 24,400t in 2Q 26 and commercial flexibility improved the realized price by 17% to US$2,089 (SC5) from US$1,790 in 1Q 26. LOW COST POSITION ...

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