Google has filed a lawsuit against the European Union, contesting obligations that would require the company to open its search data to rivals, including developers of artificial intelligence services.

The dispute centers on the EU's regulatory efforts to force Google to share data generated by its search operations with competitors. European authorities have taken the position that Google's control over search data constitutes a significant competitive advantage that rivals — among them AI developers building large-scale models — cannot realistically replicate on their own.

The litigation now places the European Commission and one of the world's largest technology companies on a direct collision course before the EU courts. At stake is the question of whether regulators can compel a dominant platform to hand over commercially valuable search data as a remedy for concerns about market power.

Google's decision to sue marks an escalation in the long-running tension between the company and Brussels over the terms on which digital markets should operate. The company has previously faced multibillion-euro fines and binding orders in the EU covering comparison shopping services, the Android mobile operating system, and advertising practices.

For practitioners, the case raises consequential questions at the intersection of competition law and the data economy. If the EU courts uphold the data-access obligations, companies holding large proprietary datasets could face mandated sharing arrangements with smaller rivals and AI developers, reshaping how data assets are treated under competition rules. If Google prevails, regulators will face tighter constraints on using access remedies to address dominance in digital markets.

The outcome will be closely watched by competition authorities, technology firms, and AI developers across the bloc, as it will help define the boundary between a dominant firm's proprietary data holdings and the informational resources competitors may claim access to under EU law.