SGML rose 6.6% after resuming operations in Brazil

Sigma Lithium (SGML) rose 6.6% on Aug 21, 2026 after the company announced a full resumption of its mining-industrial operations and said it signed a TAC agreement with the State of Minas Gerais.

What Sigma Lithium announced

Sigma Lithium said it has fully resumed its mining-industrial operations. The company also announced it signed a TAC agreement with the State of Minas Gerais, a step that signals alignment with local authorities as operations ramp back up. Alongside that update, Sigma said it expects to produce 240,000t within 12 months. In plain English: the company is telling the market it’s back online, has a formal agreement in place with the state, and has a near-term production goal.

What it means for Sigma Lithium

A full resumption of mining-industrial operations is a big operational milestone because it suggests Sigma can move from “getting ready” to actually running the asset day to day. The TAC agreement with Minas Gerais could help reduce uncertainty around operating conditions by putting expectations and commitments in writing with the state. If Sigma hits its expectation to produce 240,000t within 12 months, that could strengthen its narrative that it can scale output from its project rather than staying in stop-start mode. More broadly, the update positions the company to focus on execution: keeping operations stable, meeting production expectations, and maintaining working relationships with regulators.

How the stock reacted

SGML moved higher quickly after the announcement and finished the session up on the day.

Window	Move
5 min	+2.6%
10 min	+4.7%
30 min	+2.6%
1 hour	+3.8%
end of day	+6.6%

Against the broader market, the stock’s same-day excess move versus SPY was +6.6%.