US court rules Google won't sell ad exchange after losing antitrust case

on September 02, 2026

Google has won a significant legal battle, as a federal judge ruled that the company will not be forced to sell its advertising technology business. This decision is seen as a major victory for Google amid ongoing antitrust scrutiny.

US District Judge Leonie Brinkema in Virginia declined on Wednesday to order Alphabet-owned Google to divest AdX, despite previously finding that the company had unlawfully maintained monopolies in key parts of the online advertising technology market.

In April of 2025, the Antitrust Division of the Department of Justice prevailed in its monopolization case against Google. In United States et al. v. Google, the U.S. District Court for the Eastern District of Virginia held that Google violated antitrust law by monopolizing open-web digital advertising markets. According to the Court, Google “harmed Google’s publishing customers, the competitive process, and, ultimately, consumers of information on the open web.”

In September 2025, Judge Mehta issued his final penalties, scoring a major victory for the tech giant by rejecting the government's demand to force a sale of Chrome or Android. Instead of a breakup, the court ordered behavioral changes:

• Banning exclusive contracts that make Google the default search engine on devices.

• Requiring Google to share certain search index data with competitors.

• Setting up a compliance oversight committee for six years.

This is the third of three Google antitrust cases to reach a conclusion. While there still may be some legal wrangling over the exact nature of the advertising remedies, Google is emerging from this era of legal uncertainty largely uneffected. After years of hearings, appeals, and decisions, Google’s market power remains largely unchanged going forward. This allows the company to build new monopolies in AI, and the current DOJ doesn’t seem very interested in standing in the way of Big Tech.

Key Details of the Ruling

Judge's Decision

U.S. District Judge Leonie M. Brinkema decided against forcing Google to divest its ad business, specifically its online advertising exchange known as AdX.

Summary of the Court's Legal Findings

The Monopolies

The court explicitly found Google guilty of willfully acquiring and maintaining a monopoly over publisher ad servers (via DoubleClick for Publishers / DFP) and ad exchanges (via AdX).

The Illegal Tying

Google violated Section 1 of the Sherman Act by tying its products together, effectively forcing web publishers to utilize its ad exchange if they wanted functional access to its server technologies.

Dismissed Claims

The government failed to prove that Google successfully monopolized a third market—the open-web display advertiser ad networks market.

Implications 

This ruling is a major win for Google, which has faced multiple antitrust lawsuits. The decision allows Google to maintain its current operations without the disruption of a forced sale.

Background of the Case

Antitrust Allegations 

The U.S. Department of Justice and several states had previously sued Google, claiming it unlawfully maintained a monopoly in the online advertising market. As alleged in the complaint, through a series of acquisitions and anticompetitive auction manipulation, Google subverted competition for over 15 years. As a result of Google’s anticompetitive and exclusionary conduct, its ad tech competitors were neutralized or eliminated.

Future Considerations

Judge Brinkema issued a follow-up remedies decision, refusing the government's push for structural breakups (such as selling off AdX). She instead opted for severe behavioral remedies and mandated both parties to draft a jointly proposed final judgment.

Industry Opinion

The Computer & Communications Industry Association (CCIA) said in a statement, "The Court rightly rejected the proposed break-up of Google’s ad-tech business, which would have gone far beyond the judge’s original findings in the case. Digital advertising is fiercely competitive, and this decision confirms that antitrust remedies should be narrowly tailored to address specific identified harms.” CCIA is an international, not-for-profit trade association representing a broad cross section of communications and technology firms. 

Google's VP of Regulatory Affairs stated that they were pleased the court rejected a forced divestiture of tools that "help small businesses reach new customers and grow." Google argued throughout the trial that a breakup would complicate the market and raise advertising costs.