Almaden Minerals Raises Damages Claim to US$2.68 Billion in ICSID Arbitration Against Mexico
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TL;DR
- Almaden Minerals has increased its damages claim against Mexico to US$2.68 billion.
- The claim concerns alleged regulatory breaches over the Ixtaca mining project.
- Proceedings are under ICSID rules as a CPTPP investor-state arbitration.
- A hearing is scheduled for December 2026 in Washington, D.C.
Overview
Almaden Minerals and Almadex Minerals have jointly raised their claim for damages to US$2.68 billion in an ongoing investor-state arbitration against Mexico. The dispute concerns the Ixtaca mining project and alleged regulatory breaches following environmental permit denials and concession cancellations. The arbitration is being conducted under ICSID rules pursuant to the CPTPP.
What Happened
On May 21, 2026, Almaden Minerals reported an update to its international arbitration claim against Mexico, initiated in conjunction with Almadex Minerals.
The companies have filed their Reply to the Mexican government's December 2025 Counter-Memorial. Their claim alleges breaches by Mexico, including a December 2020 environmental permit denial, a February 2022 Supreme Court ruling suspending mineral concessions, a SEMARNAT campaign until February 2023, and a February 2023 mining authority decision cancelling concessions retroactively.
Almaden and Almadex, supported by updated expert evidence, have increased their aggregate claimed damages from previous figures to US$2.68 billion due to changes in metal prices, interest rates, and other factors.
The arbitration is funded through a US$9.5 million non-recourse facility and is proceeding under ICSID rules. The next step is Mexico's Rejoinder, due in August 2026, followed by a hearing scheduled for December 14-18, 2026, in Washington, D.C.
Context
Almaden Minerals is a Vancouver-based mining company focused on precious metals, with its principal asset prior to this dispute being the Ixtaca gold-silver project in Mexico. Almadex Minerals holds a royalty interest in the same project.
The arbitration is being conducted under the Comprehensive and Progressive Agreement for Trans-Pacific Partnership (CPTPP) as a mechanism for investor-state dispute resolution.
Why It Matters
- The raised damages claim increases the potential financial exposure for Mexico.
- The case highlights the use of ICSID arbitration under a major trade treaty for resolving regulatory and expropriation disputes in the mining sector.
- The progression of this arbitration could influence investor confidence and regulatory approaches in resource-rich jurisdictions.