Google lost the ad tech antitrust case in 2025. What it kept is more telling. A federal judge has declined to order Google to sell its online advertising exchange, previously known as AdX, leaving the Department of Justice's most consequential remedy off the table after a court found that Google illegally locked publishers into its exchange but declined to hold the company liable for how it treated advertiser tools.
The case for forcing a sale was straightforward. The Department of Justice and a coalition of states argued during the remedy phase that separating Google from the exchange, which facilitates connections between ad buyers and sellers, was the most direct path to leveling the field in online display advertising. Government lawyers contended at trial that Google had "rigged" ad auctions to give itself an advantage over rivals. The court accepted part of that account, finding illegal conduct on the publisher side. It rejected the other half.
That split ruling is what makes the remedy's collapse worth examining. The DOJ pushed for structural separation anyway, arguing that even a partial finding of illegal conduct warranted the most aggressive fix available. The judge disagreed.
The counterargument has real weight. A forced divestiture would have done more than separate one asset. The DOJ argued it would have sent a clear message to Big Tech, which has successfully beaten back a recent wave of antitrust cases. The ad exchange accounts for a relatively small part of Google's overall revenue, but keeping it inside the company means the exchange's relationship with the rest of Google's ad business stays intact. Critics of the ruling will note that the court identified real harm to publishers and still chose a remedy that leaves the underlying structure unchanged.
On balance, Google exits this trial without a structural consequence. The read-through for digital advertising is that a partial finding of illegal conduct is not enough to trigger a forced sale. The risk is that this ruling becomes a template: courts willing to name the conduct, unwilling to break the structure. The line to watch is whether the DOJ appeals. For now, Google keeps AdX, and the ad tech case that started with a liability finding ends without a single asset changing hands.