Google hit with second major antitrust loss

U.S. District Judge Leonie Brinkema found that Google engaged in anticompetitive conduct to acquire and maintain dominance in the markets for publisher ad servers and ad exchanges

by e4m Staff
Published: Apr 18, 2025 9:50 AM | 2 min read

A federal judge in Virginia has ruled that Google unlawfully holds monopoly power in key sectors of the online advertising technology market, marking a significant legal setback for the tech giant and intensifying antitrust scrutiny over its business practices.

U.S. District Judge Leonie Brinkema found that Google engaged in anticompetitive conduct to acquire and maintain dominance in the markets for publisher ad servers and ad exchanges—critical technologies that connect website publishers with advertisers and determine which ads appear on websites.

This ruling, delivered on April 17, 2025, is the second major antitrust defeat for Google within a year, following a previous court decision that found the company illegally monopolised online search. It also comes after a federal jury last December ruled that Google’s app marketplace is an illegal monopoly. Collectively, these judgments underscore the mounting legal challenges facing Google, with potential penalties that could force the company to divest significant parts of its advertising business.

Judge Brinkema’s 115-page opinion detailed how Google’s integration of its publisher ad server with its ad exchange created conflicts of interest and blocked rivals from competing effectively. The judge concluded that Google’s conduct harmed publishers, distorted competition, and ultimately hurt consumers accessing information on the open web. However, the court dismissed one of the government’s claims regarding Google’s monopoly in advertiser ad networks.

Google responded by stating it won half the case and will appeal the other half. The company argued that publishers choose Google’s ad technology because it is simple, affordable, and efficient, and denied that its acquisitions such as DoubleClick harmed competition.

The ruling sets the stage for future hearings to determine remedies, including the possibility that Google may be required to divest its Google Ad Manager business, which encompasses the publisher ad server and ad exchange. This could fundamentally reshape the economics of online advertising and the broader digital ecosystem.