The EU explores an antitrust probe into Microsoft's OpenAI deal, after the EC dropped a merger review due to a lack of evidence that Microsoft controls OpenAI
EU executive arm drops merger review into US tech companies' alliance — Brussels is preparing for an antitrust investigation …
Context & Ripple Effects
Brussels had already examined whether Microsoft’s OpenAI investment warranted merger scrutiny, but the earlier assessment found insufficient evidence of Microsoft control. The latest move keeps regulatory attention on the alliance while shifting the possible legal route from merger review to conduct-based enforcement.
This sits alongside the Commission’s existing scrutiny of Microsoft’s software distribution practices, including its Teams-and-Office bundling investigation. It also follows the Commission’s initial review of the OpenAI investment under merger rules, showing that AI partnerships can remain under examination even when they do not meet the threshold for a takeover review.
First-order effects
- Microsoft and OpenAI face the prospect of antitrust scrutiny over how their alliance operates, rather than a merger case premised on Microsoft controlling OpenAI.
- The Commission’s decision not to pursue a merger review leaves the companies without a formal control finding, but does not remove regulatory risk tied to potentially anticompetitive conduct.
Second-order effects
- Other large technology companies using investments, cloud arrangements, or distribution partnerships to secure AI access may face closer examination of the commercial terms rather than only their ownership stakes.
- Microsoft’s response will be watched against the backdrop of its earlier Teams tying complaint, reinforcing the importance of how dominant software and cloud platforms connect adjacent services.
Third-order effects
- If this approach persists, EU competition oversight may increasingly test AI alliances through conduct rules when conventional merger thresholds do not capture influence or dependency.
- That would make the structure and day-to-day operation of AI partnerships—not simply equity ownership—a more consequential competition-policy issue.
The trend: AI competition enforcement is broadening from takeover control to the practical market effects of platform partnerships and access arrangements.