Why Sigma Lithium Stock Rocketed Today

By Rich Smith – Mar 30, 2026 at 9:55AM ESTKey PointsSigma Lithium reported earnings this morning -- sort of.The company is making revenue and generating cash, but the numbers are all kind of fuzzy. Shares of Sigma Lithium (SGML +15.68%) stock, the Brazilian hard-rock lithium miner, leapt 36% in the opening minutes of trading Monday after reporting financial results for fiscal 2025. The report was a strange hybrid of Q4 2025 revenue, Q1 2026 revenue, and full-year cash flow results -- and lacked accompanying financial statements. It was far from a complete earnings report -- and investors seem fine with that. Image source: Getty Images.

What Sigma Lithium said Management boasted of strong cash from operations: $31 million in Q4 2025, $35 million in Q1 2026, and a projected $96 million in Q2 2026. Management did not disclose the capital expenditures it spent to achieve this cash flow, however -- making it impossible to calculate free cash flow. Revenue for Q4 2025 and Q1 2026 appears to have been aggregated to $67 million total (although it's possible the company meant $67 million each). Sigma Lithium did not disclose the profit margin on revenue, as calculated under generally accepted accounting principles (GAAP). ExpandNASDAQ: SGMLSigma LithiumToday's Change(15.68%) $1.64Current Price$12.10Key Data PointsMarket Cap$1.2BDay's Range$11.77 - $14.7852wk Range$4.25 - $16.88Volume15MAvg Vol4MGross Margin14.63% What's next for Sigma Lithium? Viewed most charitably, Sigma Lithium may simply believe its most recent results aren't as important as what it expects to achieve over the next 12 months. Turning quickly to guidance, management therefore advised that it expects to produce 240,000 tons of high-grade premium lithium oxide concentrate over the next 12 months. At an average price of $592 per ton, this should yield $142.1 million in annual revenue. In fiscal 2027, the plan is to more than double output to 520,000 tons of concentrate, then grow that number another 48% to 770,000 tons in fiscal 2028. Assuming prices hold firm, this should result in tremendous revenue growth. I only wish we had some idea how much Sigma Lithium was earning off of all of this.Read NextMar 30, 2026 •By James BrumleyBest 3 Nuclear Energy Stocks to Buy Right NowMar 30, 2026 •By Matt DiLalloPrediction: If the Iran Conflict Escalates, These Energy Stocks Could Double in 2026Mar 30, 2026 •By Adam Spatacco2 Oil Giants to Buy Immediately as the Iran Crisis Pushes Crude Toward $100Mar 30, 2026 •By Keith Speights3 Monster Dividend Stocks to Hold for the Next 10 YearsMar 30, 2026 •By Keith SpeightsShould You Buy Brookfield Renewable Corporation While It's Below $40?Mar 29, 2026 •By Joe TenebrusoWhy ExxonMobil, Transocean, SLB, and Other Oil Stocks Surged This WeekAbout the AuthorRich Smith is a contributing Motley Fool defense and stock market analyst covering publicly traded and emerging companies in defense, space, aerospace, and other sectors. Prior to The Motley Fool, Rich practiced international corporate law for Clifford Chance in Russia, and for the Russian-Ukrainian Legal Group in Moscow, Kyiv, and Washington, D.C. He holds a bachelor’s degree in international relations from the College of William & Mary, a law degree from the University of Baltimore, and a language certification from the International Institute of Russian Language & Culture in Tver, Russian Federation. The Globe and Mail once featured him as “one of the best stock pickers since 2009.”TMFDittyX@RichSmithFoolStocks MentionedSigma LithiumNASDAQ: SGML$12.10(+15.68%)+$1.64*Average returns of all recommendations since inception. Cost basis and return based on previous market day close.