Judge Finds Google Illegally Locked Up Web Advertising, Rejects DOJ Plan to Force a Breakup
Google keeps its AdX exchange and must instead open auctions to rivals, share bid data, and accept six years of monitoring.
A Virginia federal judge has now spelled out what happens after Google was found to have an illegal grip on the technology that places ads across the web. The answer is not a breakup. It is a set of rules, data-sharing requirements, and a monitor — for six years.
Judge Leonie Brinkema found last year that Google tied its publisher ad server (DFP) to its ad exchange (AdX) in a way that locked websites into Google’s system and shut out rivals. The Justice Department wanted Google forced to sell AdX. The judge said a breakup was “neither realistic nor needed.” That is the headline that matters.
What Google must do instead is make its tools work with competitors, including Prebid, the open-source bidding system publishers already use to shop their ad space around. AdX must send bids to rival ad servers on the same terms it gives Google’s own server. Publishers get more auction data — winning bids and losing ones. Google’s advertiser tool, AdWords, cannot favor Google’s own pipes. An internal monitor is supposed to watch compliance.
Those changes sound serious on paper. They take months to build. The order lasts six years, not the 15 the government wanted. Google keeps AdX. It keeps the stack that sits in the middle of online advertising. Courts have now twice called Google a monopolist — once on search, once on ad tech — and twice declined to take the business apart.
That pattern should worry anyone who does not trust a handful of California companies to referee the internet. Online ads are not some side hustle. They pay for news sites, local papers, sports blogs, and the small publishers that still try to make a living without becoming a content farm. When one company runs the server, the exchange, and a huge share of the buying, publishers get squeezed and advertisers pay in the dark.
Behavioral remedies have a long record of looking tough and aging poorly. Companies this large have lawyers, engineers, and time. A monitor inside the company is not the same as a competitor with a real product. Interoperability orders can be slow-walked, narrowed, or gamed in the fine print. By the time the six years run out, artificial intelligence will have rewritten more of the ad market than any court decree.
None of this means the government should run Google. Forced sales can wreck working tools and hurt the small businesses that actually use them. What it does mean is that “we found a monopoly” followed by “please share some data” is becoming the standard ending. Big Tech keeps the prize. The public gets a press release.
Publishers should watch whether they can actually leave Google’s system without losing demand. Advertisers should watch whether auctions get clearer or stay a black box with extra paperwork. And anyone who thinks concentrated power in Silicon Valley is just a coastal problem should take notice.
Sources / More reading
https://www.nytimes.com/2026/09/16/technology/google-ad-tech-remedies.html
https://www.justice.gov/opa/pr/department-justice-again-wins-substantial-relief-against-google
https://www.courthousenews.com/monopolist-google-gets-behavioral-guardrails-and-a-monitoring-plan
https://thenextweb.com/news/google-ad-tech-ruling-unsealed
https://www.thehill.com/policy/technology/6095515-google-ad-auction-monopoly/
https://www.nytimes.com/2025/04/17/technology/google-ad-tech-antitrust-ruling.html