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SGML · Analysis updated Nov 10, 2026, 6:00 PM ET
Why is Sigma Lithium Corporation Common Shares (SGML) stock moving?
The stock fell from $7.00 on Oct 30 to a $5.21 close on Nov 2, a 25.6% drop on about 18.7M shares, roughly eight times the prior sessions' volume. The drop came as the company launched its first convertible bond. The bond was later upsized to US$125M with a 7.00% fixed coupon, replacing an 11.45% floating-rate Synergy Capital loan and cutting short-term debt by about 80%. The conversion price is US$6.51, about 23% above the Nov 10 close of $5.29, and conversion is barred for 12 months. The company also disclosed a 32% Q3 gross margin, a 6% cut to FY26 AISC guidance to US$668/t, and FY27 AISC guidance of US$620/t. Against that, Q3 output was 7,293t sold after a shutdown, about 21,000t of intermediate product remains unprocessed, and cash was US$10M at Sep 30. Shares have since partly recovered to $5.95 on Nov 9 but fell 11% on Nov 10 on volume of 2.9M, into the Nov 13 earnings release and call. The 2,000-share-scale trading range since Nov 2 has been roughly $4.99 to $6.13.
News behind the analysis
- Sigma Lithium Announces R$ 675 Million Convertible DebentureSigma Lithium has secured a R$ 675 million convertible debenture to support its industrial and social projects in Brazil.
- Sigma Lithium Prices Upsized $125 Million Convertible Bond OfferingSigma Lithium priced an upsized $125 million senior unsecured convertible bond due 2031 at a 7.00% fixed coupon, with a conversion price of US$6.51, to refinance its Synergy Capital senior secured debt.
- Sigma Lithium Previews Third Quarter 2026 Financial ResultsSigma Lithium previewed unaudited Q3 2026 results with a 32% gross margin, a 6% cut to FY26 AISC guidance to US$668/t, and production of 7,293t sold, with about 21,000t of inventory left unprocessed after a shutdown.
- Sigma Lithium Announces US$100 Million 5-Year Inaugural Convertible Bond OfferingSigma Lithium launched a US$100 million inaugural convertible bond offering on Nov 2 to refinance existing senior secured debt; the offering was later upsized by 25%.
About Sigma Lithium Corporation Common Shares
Sigma Lithium is a Canadian-incorporated lithium miner that runs the Grota do Cirilo hard-rock lithium project in Minas Gerais, Brazil, and is listed on Nasdaq and in Toronto. It produces high-grade spodumene (lithium oxide) concentrate with a dry-stacking, low-carbon process and is trying to expand capacity in stages. In 2026 it also had to deal with a production stoppage ordered by local authorities, going-concern warnings and disclosed weaknesses in its financial controls.
How it makes money
Almost all of its revenue comes from selling lithium concentrate to battery-materials and chemical buyers, mainly in Asia, priced off spot lithium markets. Some sales are funded in advance through offtake and export prepayments. Revenue was about $97 million in the first half of 2026, then fell to roughly $23 million (preliminary figure) in Q3 2026 after the production halt. Its expansion plans (Phase 2, and later Phase 3) depend on loans, including from Brazil's development bank BNDES, and on customer prepayments.
What usually moves SGML
- Spot lithium and spodumene prices
- EV and battery demand, especially in China
- Production volumes and progress on expanding the mine
- Brazilian regulatory and permitting decisions
- Debt refinancing and liquidity