Google's Ad-Tech Breakup Ruling Is Imminent — DOJ Wants AdX and DFP Sold Off

A federal judge is expected to rule this week on whether Google must sell its AdX ad exchange and DoubleClick for Publishers (DFP) server — the structural core of its digital advertising monopoly. The liability phase is already over: Judge Leonie Brinkema in the Eastern District of Virginia found Google illegally monopolized publisher ad servers and ad exchanges. What remains is the remedy, and the two sides could not be further apart.

The DOJ, joined by 17 state attorneys general, is demanding forced divestiture. Google sells AdX, sells DFP, and exits the publisher-side ad infrastructure business entirely. If ordered, it would be the most significant forced corporate breakup in the United States since the DOJ split AT&T in 1984.

Google is arguing the opposite: behavioral remedies only. The company proposes allowing competitors to access its systems under nondiscriminatory terms, adding transparency requirements, and making API changes that nominally open the market — without Google having to divest anything. The pitch is that structural remedies would harm the advertising ecosystem, not improve it.

Judge Brinkema had set an internal March 31 deadline for the ruling and missed it. Legal observers interpret the delay as a sign she is weighing the remedy with unusual care, not defaulting to either side’s preferred outcome. The ruling is expected any day.

The stakes extend well past ad tech. Google is simultaneously fighting a second DOJ action — filed alongside 38 state attorneys general in February 2026 — over remedies in its Search monopoly case. The ad-tech ruling’s remedy approach could set the template for how aggressively courts are willing to restructure dominant tech platforms. If Brinkema orders divestiture of AdX and DFP, the DOJ’s leverage in the Search case increases substantially.

For the advertising industry, a forced sale would reshape the market fundamentally. AdX processes hundreds of billions of impressions per year. An independent AdX — no longer owned by the company that also buys ad inventory through its own DSP — would remove the most obvious structural conflict that publishers have complained about for a decade: Google arbitrating the market it participates in.

Divestiture would not fix online advertising overnight. The programmatic stack has too many entrenched players and too many opaque layers for a single court order to solve. But it would establish that digital monopolies are not immune to structural remedies, and that changes the calculation for every dominant platform that followed Google’s playbook.

The ruling, whenever it lands, will be one of the most consequential tech antitrust decisions in a generation.