Investment Thesis
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.
Core Allegations
Mine Safety Fraud: Dangerously Steep Pit Walls
A 2025 technical report alleges Sigma deviated from its approved mine plan, building walls up to 65 meters — nearly 3× the 24-meter limit — creating conditions with a "high potential for loss of human life."
Systematic Non-Disclosure of Material Litigation
Multiple lawsuits from prosecutors, the mining contractor, and creditors appear to have been concealed from investors — including during the Q3 FY2025 earnings call one month after the contractor lawsuit was filed.
Liquidity Crisis Far Worse Than Disclosed
Only $6.1M cash vs. $54.8M in payables, ~$22M owed to former contractor, a $2M default judgment, and $100M loan due in 2026. Sell-side estimates $200M needed for near-term obligations.
State Prosecutor Emergency Lawsuit
Filed December 2025, seeking emergency injunction, mining restrictions, and a $9.2M asset freeze — citing fear that Sigma's finances have deteriorated too far to fund remediation. Undisclosed to investors.
Federal License Annulment Threat
Federal prosecutors issued formal demands to suspend and annul Sigma's mining and environmental licenses, citing failure to consult indigenous communities — the same legal theory that shuttered Vale's Onça Puma project for 2+ years.
Governance Collapse: 5 CFOs in 3 Years
Five CFOs and seven independent director departures since the mine opened. Average independent director tenure of just 1 year and 4 months. Blue Orca cannot recall a company surviving similar turnover.
Liquidity Pressure: Claims vs. Available Cash
Blue Orca alleges undisclosed obligations dwarf Sigma's reported cash position. Source: Blue Orca analysis of court filings and financial statements.
Pit Wall Height: Approved Plan vs. Actual
The Chiavini Report alleges benches exceed the 24-meter approved maximum by up to 2.7×. Source: Chiavini Report (Aug 2025).
CFO Turnover — 5 in 3 Years
| 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 |
Timeline of Key Events
August 2025
Chiavini Report Completed
Independent mining engineers conclude Sigma deviated from mine plan, creating walls up to 65m tall with "high potential for loss of human life." Report includes ART attestation subjecting authors to civil/criminal liability.
September 3, 2025
Federal Prosecutor Demands Mining License Suspension
Formal Recomendação issued to ANM (Brazil's mining agency) demanding review, suspension, and annulment of mining authorizations at Grota do Cirilo. 20-day compliance deadline.
September 18, 2025
Federal Prosecutor Targets Environmental Licenses
Second Recomendação issued to SEMAD (state environmental agency) demanding suspension and annulment of Sigma's environmental licenses for North and South Pits.
October 6, 2025
Mining Contractor Departs — Mine Effectively Shut Down
Sigma announces contractor Fagundes is leaving as a voluntary "upgrade." Brazilian media reports the contractor left because Sigma stopped paying. Mine goes idle at start of rainy season — when safety risks are highest.
October 15, 2025
Fagundes Sues Sigma for ~$22M
Mining contractor files sealed lawsuit in São Paulo civil court as an Enforcement of Extrajudicial Title — a procedure for creditors with presumed-valid debt instruments. Undisclosed to investors.
November 14, 2025
Q3 FY2025 Earnings Call — No Disclosure
One month after Fagundes lawsuit, management does not disclose the litigation. Instead claims payables extension is a strategic decision to match downstream payment terms.
November 25, 2025
$2M Arbitration Award Against Sigma
Teneo Strategy wins $2M final award after Sigma abandoned the arbitration — failed to pay legal counsel, arbitration costs, or appear at hearings. Undisclosed to investors.
December 16, 2025
State Prosecutor Files Emergency Lawsuit
Minas Gerais prosecutor files 70-page complaint alleging systematic environmental and social harm, seeking emergency injunction and $9.2M asset freeze. Court ruling possible any day.
January 20, 2026
Teneo Sues in New York State Court
Strategic advisory firm moves to confirm and enforce the $2M arbitration award in New York. Still undisclosed to investors.
February 2, 2026
Sigma Claims "Resumed Mining Activities"
Announcement uses careful language — "mining activities" rather than mining production. States guidance will come "after all equipment is mobilized." Blue Orca questions whether mine is truly in normal production.
February 26, 2026
Blue Orca Publishes Short Report
32-page report reveals undisclosed litigation, mine safety allegations, and liquidity crisis. SGML gaps down to ~$15.03 at open.