Key Highlights

  • SGML reported second-quarter 2026 net Revenue of $54.7 million, missing the $68.3 million estimate by 19.95 percent, with adjusted EPS of negative $0.02 missing the $0.15 estimate by 113.33 percent.
  • The company produced 35,400 tons of lithium oxide concentrate, up 52 percent quarter over quarter, while maintaining a 60 percent gross Margin and a record 47 percent EBITDA margin.
  • All-in sustaining costs fell to $668 per ton, and the company lowered its full-year 2026 cost guidance to reflect the improvement, reiterating a 2027 target of $620 per ton.
  • The company repaid 25 percent of total Debt over the past year and 43 percent over the past two years, while continuing to advance plans for a second and third production plant.

Record Margins Achieved Despite Revenue Miss

Sigma Lithium Corporation (NASDAQ:SGML), a Canada-incorporated lithium producer operating its Grota do Cirilo complex in Brazil's Araçuaí and Itinga regions, reported that despite a temporary operational suspension tied to negotiations with the state of Minas Gerais, the company achieved a record 47 percent EBITDA margin in the quarter on disciplined cost control and higher production volumes. Management said the revenue shortfall relative to estimates reflected a deliberate decision not to sell lower-grade material produced during the quarter, opting instead to present what it described as a clean quarter of high-grade production and sales.

Because that unsold low-grade inventory, along with previously sold but uncollected high-grade material, represents cash the company expects to collect in the third quarter, roughly $60 million by management's estimate, the quarter's revenue figure understates the underlying cash generation potential of the Business during the period.

Operational Suspension Tied to Local Permitting Dispute

The company temporarily suspended both Mining and industrial operations following notifications related to ongoing negotiations over its environmental and operating agreement, known as a TAC, with local authorities, which management characterized as based on false accusations from local inspectors. Management said it is negotiating from a position of financial strength given its substantial cash flow, and is seeking full clearance of the allegations rather than a simple settlement, with the mine expected to restart within one to two weeks of the earnings call.

Because the timing and terms of the resolution remain subject to ongoing negotiation with state authorities, the exact restart date and any conditions attached to resuming full operations carry some uncertainty beyond the company's stated expectations.

Fleet Upgrades Support Expanded Mining Capacity

During the quarter, the company continued deploying larger 75-ton trucks and 98-ton excavators to increase haulage capacity, part of a broader fleet upgrade that increased haulage scale by 40 percent in the first half of the year. A redesigned mining pit shell unlocked access to a block of ore 83 percent larger than under the previous design, containing 1.1 million tons of fresh high-grade ore at 1.4 percent lithium oxide grade, which management said could produce approximately 200,000 tons of concentrate. The company reiterated plans to potentially green-light construction of a second and third production plant simultaneously in January 2027, targeting installed capacity of 830,000 tons by the end of 2028.

Conclusion

Sigma Lithium's record margins and continued deleveraging demonstrate the resilience of its low-cost production model even through an operational disruption tied to local permitting negotiations. The pace at which the company resolves its TAC dispute with Minas Gerais authorities and converts its currently unsold high-grade and low-grade inventory into cash will be the most immediate variables shaping third-quarter results, while the timing of its planned second and third plant construction will determine the trajectory of production growth into 2028.