"Grupo México Loses Appeal to End Strike at San Martín Mine", 31 October 2025.

The National Mining Union...obtained another favorable ruling against Grupo México (GM), after a collegiate court rejected the appeal filed by the company and its employers’ union, which sought to end the strike at the San Martín mine in Sombrerete, Zacatecas, which has lasted more than 18 years.

This resolution represents a new setback for the company Industrial Minera México, a subsidiary of GM...and also confirms the constitutional right to strike that began on July 30, 2007, by the workers of section 201, who must be paid their back wages...

Unanimously, the judges of the collegiate court in labor matters approved the project by which it was resolved to declare “inadmissible” the appeal of nonconformity promoted by an employers’ organization affiliated to the National Federation of Independent Unions.

Velasco recalled that Grupo México has made countless failed attempts, by any means including “illegal acts”, to break the strike...

It was within this framework, in June 2023, that the Federal Board of Conciliation and Arbitration (JFCA) “had no other option” and determined – after nine years of filing the liability lawsuit – the responsibility for the strike on the employer side, thus ordering the payment of back wages and social security contributions to the striking workers from 2007 to date, as well as the reparation of various violations, he pointed out...