Sigma Lithium rebounds on additional sales, denies report on Brazil ops

Staff Writer | January 23, 2026 | 8:38 am Battery Metals Markets Canada Latin America Lithium

Sigma Lithium hikes resources, life of flagship mine in Brazil

Grota do Cirilo is said to be among the world’s largest and highest-grade hard rock lithium deposits. (Image courtesy of Sigma Lithium.)

Sigma Lithium (TSXV, NASDAQ: SGML) rebounded sharply on Friday after announcing additional sales of its product and shutting down media reports of an “operational injunction” on its flagship mine in Brazil.

Earlier this month, several news outlets in Brazil claimed that authorities had ordered a shutdown of waste piles at Sigma’s Grota do Cirilo operations in Minas Gerais due to environmental and safety risks.

The company, however, calls this “fake news” created by online media, using information published on falsified government websites. It claims that these are part of a “defamatory campaign” created to benefit short sellers.

Sigma has yet to respond to MINING.COM’s request for comment.

Sigma Lithium jumped as much as 17% following this update, sending its share price back to levels seen last week and taking the stock back into the green on the year. The company is trading near $14.50 in New York with a market capitalization of $1.6 billion.

Operation updates

In a further boost to investor sentiment, Sigma said on Friday it made an additional sale of 100,000 tonnes in high-purity lithium fines at market price, which has risen since its last sale.

Additionally, the Canada-based lithium miner said remobilization activities at its Brazilian mine site are proceeding as planned and expected to conclude this month.

The Grota do Cirilo operation currently has a nameplate capacity to produce 270,000 tonnes of lithium oxide concentrate on an annualized basis (or approximately 38,000-40,000 tonnes of lithium carbonate equivalent). The company is in the process of constructing a second plant to double its capacity.