AdX: Google's headache

Google keeps AdX, and the judge changes the auction's rules instead of breaking it up


The September 2 ruling rejected the 3 structural remedies the Justice Department sought and ordered conduct remedies that remain under seal.

September 3, 2026 · Translated from the Spanish original

What happened

Why it matters

The number

3 structural remedies rejected. The sale of AdX, open-sourcing DFP’s auction code and the conditional sale of the rest of the ad server. The order rejects them in capital letters, without explaining why in the public document.

Context

Brinkema ruled in April 2025 that Google illegally monopolized the markets for publisher ad servers and ad exchanges. A third charge, on advertiser ad networks, didn’t succeed. The remedies phase ran between September and October 2025, and closing arguments wrapped up in November. From the bench, the judge had already raised doubts about who would buy AdX and what would happen to the small publishers that use DFP without paying.

What’s next

Bottom line

The European Commission also demanded that Google divest part of its advertising business, and the company refused in November 2025. Two jurisdictions, the same practical conclusion: it’s faster to change the auction than to change the owner.

This note describes an ongoing court ruling and does not constitute legal advice.

Sources

Related notes

← All notes