The National Markets and Competition Commission (CNMC) has communicated this Friday the opening of 15 new sanctioning proceedings for indications of "serious" infringements within the investigations into the blackout of April 28, 2025, although the investigated conduct would have occurred on dates other than that day.
Most of these proceedings are directed against Endesa, while the rest are distributed among TotalEnergies, Engie, and ContourGlobal La Rioja.
These new cases are added to the twenty files announced last Friday the 17th, which affected Red Eléctrica de España (REE) —with a "very serious" rating— and to various electricity generation facilities (combined cycles, renewables or nuclear) of the main companies in the sector —Iberdrola, Endesa and Naturgy—, as well as Repsol or Bahía de Bizkaia Electricidad, all of them for "serious" infractions.
“Since then, the CNMC has continued with the opening of other sanctioning proceedings,” explains the Commission, which insists that the practices under scrutiny would have occurred on days other than April 28 of last year, the date on which the electrical blackout occurred.
“The notifications initiated also include the investigation of practices that occurred on days or periods other than April 28, 2025, but which would also constitute indications of possible sectoral infringements detected within the framework of the incident investigation,” the agency specifies.
In this new batch, all files are classified as “serious”, almost all for an alleged violation of article 65.8 of Law 24/2013, on the Electricity Sector (LSE), relating to “non-compliance with art. 64.15, 16 and 17 without risk of guarantee of supply or serious damage”.
The only exception is the procedure initiated by theAsociación Nuclear Ascó-Vandellós II AIE (ANAV), owned by Endesa and Iberdrola, which is being processed for a "serious" infraction contemplated in article 65.34 of the LSE, for "offers with abnormal or disproportionate values to improperly alter the dispatch of generation units or market matching".
However, the CNMC emphasizes in a public note that "the facts object of these proceedings do not imply, by themselves, the attribution of the origin or cause of the blackout to the affected companies, given that the incident responded to a multifactorial origin".
“The initiation of these proceedings does not prejudge the final outcome of the investigation,” emphasizes the Commission, which recalls that these sanctioning processes can last between nine and eighteen months, depending on the seriousness of the alleged infringement, and that the companies involved will have time to submit allegations and request the taking of evidence.