Google Wins Again: Judge Rejects Ad Tech Breakup in Third Big Tech Antitrust Loss for DOJ

Google Defeats US Bid to Force Ad Tech Sale

A federal judge in Virginia has rejected the U.S. Department of Justice’s bid to force Alphabet’s Google to sell its online advertising exchange, marking the third consecutive defeat for antitrust enforcers seeking to break up a major technology company. Judge Leonie Brinkema declined to order the divestiture of AdX, the platform where publishers pay Google a 20 percent fee to sell ad space in real-time auctions, instead accepting most of the behavioral remedies proposed by the parties. The decision deals a significant symbolic blow to the DOJ’s campaign against Big Tech monopolies and raises fresh questions about whether the courts are equipped to impose structural remedies on the industry.

The ruling follows a long-running antitrust case. In 2023, the DOJ and a coalition of states sued Google over its dominance in the markets for advertising technology used by online publishers and websites. In April 2025, Brinkema found that Google held illegal monopolies on ad servers for publishers and on ad exchanges that sit between buyers and sellers. She ruled that Google unlawfully locked publishers on its ad server into using its AdX, and that the company’s anticompetitive conduct “substantially harmed Google’s publisher customers, the competitive process, and, ultimately, consumers of information on the open web.” The remedies trial that followed became the stage for a clash over how to fix the harm.

The DOJ argued that Google could not be trusted to operate AdX given its past behavior and that only a forced sale would restore competition. Google countered that a divestiture would be technically complex and would cause a long and painful transition that would hurt customers. Brinkema sided with Google on the structural remedy, accepting behavioral conditions instead. The exact terms of those remedies were not detailed in the source, but the judge’s decision effectively leaves Google’s ad-tech empire intact, albeit subject to new conduct restrictions.

This is the third time in a row that a judge has rejected a U.S. antitrust enforcer’s push to break up a Big Tech company, a crackdown that began during President Donald Trump’s first term. In a separate case, a judge similarly declined to force Google to sell the Chrome browser. The pattern is likely to fuel debate about whether the judiciary is willing or able to impose the kind of structural remedies that many critics of Big Tech argue are necessary to curb the industry’s concentrated power. The DOJ has not yet indicated whether it will appeal the ruling.

For investors and market observers, the decision removes a significant overhang on Google’s stock. AdX, while a small part of Google’s overall revenue, sits at the center of the company’s digital advertising ecosystem. A forced sale would have required Google to unwind a tightly integrated system that processes billions of ad auctions daily. The practical difficulty of such a divestiture was a key argument in Google’s defense, and the judge’s acceptance of that argument signals that courts remain cautious about ordering breakups of complex technology platforms.

The broader implication is that antitrust enforcement against Big Tech may continue to rely on behavioral remedies rather than structural separation. That approach has a mixed record in other industries, where regulators often struggle to monitor compliance and companies find ways to work around restrictions. Whether the behavioral remedies imposed in this case will meaningfully alter Google’s conduct or restore competition in ad tech remains an open question. For now, Google has escaped the most severe penalty available, and the DOJ’s campaign to break up the industry’s giants has suffered another setback.