US big tech companies (Amazon, Apple, Google, Meta and Microsoft) are the targets of more than a dozen pending antitrust investigations in Europe, having previously received fines or made concessions in almost 50 past cases brought by the European Commission and national competition authorities.

These ex post antitrust cases are on top of the ex ante enforcement action against big tech companies under the EU Digital Markets Act (DMA).

Key takeaways

• Competition authorities in Europe have brought a total of over 60 antitrust cases against US big tech companies. Besides the European Commission, national authorities in France, Germany and Italy have been the most active competition enforcers.
• Even with many competition issues being addressed ex ante by the DMA, ex post antitrust enforcement did not slow down: 2025 saw a record number of antitrust decisions, including 5 infringement decisions and 5 settlements.
• Currently, there are two ongoing EU antitrust probes, which target Google and Meta for AI-related conduct. However, each big tech company also faces scrutiny at the national level, with national competition authorities running 13 investigations in total.

These findings are drawn from Cullen International’s latest report on past and pending antitrust cases against big tech companies in Europe.

The report provides an overview of all the cases brought under ex post antitrust rules at EU and national level, with most cases targeting alleged abuses of dominance. It links to detailed analytical case summaries in Cullen International’s Antitrust & Mergers Database.

Scope
Region: Europe
Countries covered: 30 (EU-27, Norway, UK, Switzerland)
Policy area: Competition
Last updated: January 2026

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