Federal Judge Rejects DOJ Bid to Split Google's Ad Tech Business, Orders Behavioral Changes

A federal judge on September 2, 2026 declined to break up Google's advertising technology business, rejecting the Justice Department's request that Alphabet be forced to sell AdX, its ad exchange. Judge Leonie Brinkema of the U.S. District Court in Alexandria, Virginia also denied the DOJ's request that Google open source the auction logic behind its publisher ad server. The ruling follows her April 2025 finding that Google had willfully monopolized both the publisher ad server and the ad exchange markets.

What Brinkema ordered instead is behavioral, and the details are not yet knowable. She said she agreed to most of the remedies suggested by the two sides, but her full opinion is under seal for 14 days while both sides propose redactions, and the parties have 30 days to submit a joint proposed final judgment. Any account of what Google must actually change should be treated as provisional until that opinion is unsealed.

The stakes are large relative to the remedy. The disputed technology underlies a meaningful share of Google's nearly $400 billion in annual ad sales, and AdX is the exchange where publishers pay a 20% fee. Google's vice president of regulatory affairs, Lee-Anne Mulholland, said the company was pleased the court rejected a proposal to break apart tools that help small businesses reach new customers. Critics were blunter: Sacha Haworth of the Tech Oversight Project said it takes an Olympic level of mental gymnastics to find an illegal monopoly and then decide to do nothing about it.

GOOGL rose 0.6% on the decision, a muted move that suggests much of the breakup risk had already been discounted. The number that matters is not today's but the unsealed opinion roughly two weeks out, and then the joint proposed judgment 30 days out, where the operational cost becomes visible. Behavioral remedies touching auction mechanics or data sharing can bite harder than a first day reaction implies, and how weak or strong this remedy turns out to be will also shape how aggressively the DOJ pursues structural relief in its remaining technology cases.

Related Stocks

• GOOGL