Judge Siobhán Lankford threw out O’Brien’s High Court challenge to the DPC dismissal, stating that he had “not succeeded on any of the grounds argued”.

The inquiry will examine the processing of personal data in publicly accessible posts on X by EU users.

Meta, which operates Facebook and Instagram, claims the DPC failed to consider whether the fines totalling €91 million were “effective, proportionate and dissuasive”, as required by the GDPR