Undisclosed Lawsuits, Dangerous Mine Walls, and a Looming Liquidity Abyss
Blue Orca alleges Sigma deviated from its approved mine plan, concealed existential legal threats from federal and state prosecutors, and faces a liquidity crisis far worse than investors have been led to believe.
"The technical report alleges that Sigma deviated from its mine plan and built pit walls so dangerously steep that it created a 'high potential for loss of human life,' threatening the safety of workers and the economic viability of the mine."
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Blue Orca alleges that Sigma Lithium sacrificed its mine's future — and worker safety — to flatter short-term profits. Brazilian court records reveal a pattern of undisclosed material litigation: state prosecutors seeking emergency asset freezes, federal prosecutors demanding license annulment, a former mining contractor suing for ~$22 million, and over a dozen additional creditors piling on. With only $6.1 million in cash against $54.8 million in payables and a $100 million loan due in late 2026, Sigma appears to have zero margin for error — yet it faces existential legal threats it has not disclosed to investors.
| Name | Tenure | Departure | Status |
|---|---|---|---|
| Felipe Peres | 6 months | Current (2nd stint) | Current |
| Rogério Marchini | 11 months | Aug 2025 | Departed |
| Caio Araujo | 1 yr 1 mo | Sep 2024 | Departed |
| Rodrigo Menck | 6 months | Jul 2023 | Departed |
| Felipe Peres (1st stint) | 1 yr 4 mo | Jan 2023 | Departed |
"Anything over 30 meters will be unsafe. So 60 meters or taller is very unsafe. They're dangerous and their safety factor is very low. Shale is very, very weak to begin with, and can fail at any time."
"The current pit appears to be a financial risk to production as well as a safety hazard."
Sigma Stands on the Precipice of Catastrophe
Blue Orca alleges that Sigma faces a toxic combination of credible mine safety allegations, undisclosed existential legal threats from federal and state prosecutors, an undisclosed lawsuit from its mining operator, and a liquidity crisis far worse than investors have been led to believe. With $6.1 million in cash, a mine of questionable viability, and a wall of undisclosed obligations, the short seller argues Sigma cannot afford for the mine to be idle while it battles prosecutors, creditors, and regulators in court — yet that is precisely the situation it faces.
This dashboard is an editorial summary of a short seller research report published by Blue Orca Capital (BOC Texas, LLC) on February 26, 2026. Blue Orca and its affiliates hold short positions in Sigma Lithium Corporation (NASDAQ: SGML) and stand to profit from declines in the stock price. The opinions expressed in the original report are solely those of BOC Texas, LLC and are not statements of fact. This dashboard does not constitute financial advice. All information is presented "as is" without warranty of any kind. Investors should do their own research and due diligence before making any investment decisions. Refer to the full Blue Orca Capital report and disclaimer for complete terms and disclosures.