Sigma Lithium Resources is trading at $11.00 (-11.22%) in pre-market after a Brazilian federal court suspended environmental permits and ordered mining halted at Grota do Cirilo, its sole producing operation.
- The ruling followed allegations that the project affects the nearby Baú Quilombola community and requires additional impact studies.
- Sigma Lithium Resources disputed the ruling, saying it had not received formal notice and operations remained ongoing as of September 7, 2026.