Judge clears $1.72 billion Google ad tech damages for jury trial

This ruling shifts the legal battle from market definitions to concrete financial liabilities, forcing Google to defend specific, formerly secret programs like Bernanke and Poirot before a jury. For the streaming and digital advertising ecosystem, the trial will provide a public accounting of how exchange mechanics influenced inventory pricing and win rates for over a decade. The outcome will likely set a damages benchmark for twelve other follow-on lawsuits from companies including Raptive and Dotdash Meredith. Watch for the jury's assessment of Google's mitigation defense, which argues publishers could have used price floors to offset their reliance on AdX inventory.

The Google ad tech damages trial builds on a landmark liability ruling from April 2025. US District Court Judge Leonie Brinkema found Google guilty of monopolizing the open-web display publisher ad server and ad exchange markets, ruling that the company violated Section 2 of the Sherman Act by willfully acquiring and maintaining monopoly power. The court also determined that Google unlawfully tied its publisher ad server DFP to its ad exchange AdX, using contractual policies and technological integration to protect its dominance. That liability finding now anchors the $1.72 billion damages phase before Judge Castel in Manhattan, where publishers must quantify specific overcharges caused by programs like Project Bernanke and Enhanced Dynamic Allocation.

Google's legal exposure has expanded with a remedies ruling that imposes structural and behavioral constraints on its ad stack. In September 2026, the court unsealed Judge Brinkema's remedies decision requiring Google to build API integrations connecting AdX and DFP to Prebid, the open-source header bidding framework that Google had long resisted joining. The order also mandates that AdX submit real-time bids to rival publisher ad servers on functionally equivalent terms, share bid data including wins and losses with publishers, and prohibits AdWords from bidding directly into DFP or favoring Google's own ad tech tools. These remedies arrive as the damages trial tests whether Google's auction manipulation caused measurable financial harm to publishers including Gannett and the Daily Mail.

The broader antitrust landscape around Google's advertising business has intensified across multiple fronts. CNN reported that the ad tech monopoly ruling marked the US government's second major court victory over Google in less than a year, following the search monopoly decision, and the third since a federal jury found Google's app store to be an illegal monopoly in December 2023. The DOJ has called for both structural and behavioral remedies in the ad tech case, including a potential forced divestiture of Google's ad tech assets and a ban on self-preferencing. The damages trial outcome will likely establish a financial benchmark for the twelve follow-on publisher lawsuits already filed against Google's ad stack.