In a Big Win, Google Won’t Have to Break Up Its Ad Tech Business, Court Rules

The ruling, penned by Judge Leonie Brinkema of the Eastern District of Virginia, leaves Google’s flagship tools—its publisher ad server DoubleClick for Publishers and the AdX exchange—firmly in the same corporate hands that built them.

The Department of Justice’s 2023 lawsuit alleged that Google’s control of the ad server, the ad exchange, and the buying platform locked out rivals and forced publishers into a bundled arrangement. A year earlier a district judge affirmed the monopoly claim, prompting the DOJ to ask for structural remedies: a forced divestiture of AdX and the open‑sourcing of the auction algorithm that matches ads to inventory. Brinkema’s order, however, tossed those proposals aside. Instead she said “most” of the government’s behavioral suggestions were accepted with modification, signalling that the company must curb self‑preferencing, adjust data‑sharing practices, and treat third‑party ad servers without discrimination. The exact language of those changes stays sealed for now.

Google’s regulatory affairs vice‑president Lee‑Anne Mulholland responded, “very pleased the Court rejected the DOJ’s proposal,” adding that the company’s tools help small businesses reach customers. The response was met with sharp criticism from advocacy groups. Sacha Haworth of The Tech Oversight Project called the decision “mental gymnastics,” arguing that recognizing a monopoly while refusing substantive correction sends the wrong signal during a national affordability crisis. Meanwhile, a litany of publishers—The Atlantic, USA Today, Vox Media, Penske Media—have filed separate suits seeking damages, underscoring that the dispute is far from settled.

The ad‑tech outcome mirrors a parallel antitrust battle over Google’s search dominance, where Judge Amit Mehta also declined to order a breakup of Chrome but imposed data‑sharing obligations and bans on exclusive distribution contracts. Both rulings reveal a judicial pattern: courts are willing to acknowledge monopoly power yet prefer behavioral tweaks over dismantling entrenched platforms.

As the sealed opinion eventually surfaces, the industry will watch for the precise limits imposed on self‑preferencing and data sharing. Those details will determine whether Google’s ad‑tech dominance remains a de‑facto monopoly in practice, or if the behavioral fixes become a foothold for future enforcement actions.