Judge orders Google AdX Prebid access but rejects ad tech breakup

The ruling transforms AdX from a walled-off system into a standard participant in neutral auctions, likely lowering Google's win rates while increasing publisher revenue through heightened competition. For the broader streaming and digital ecosystem, the decision establishes data sharing as a legitimate antitrust remedy but leaves Google's buy-side integration with DV360 largely untouched. This creates a bifurcated market where open web display faces new transparency requirements while high-growth areas like CTV and retail media remain unregulated. Industry observers should monitor whether European regulators view these behavioral mandates as a sufficient template or if they will pursue the structural breakups that the U.S. court ultimately declined to enforce.

The court's decision to implement a six-year ad tech antitrust monitor ensures ongoing compliance with these new data-sharing requirements, even as the industry continues to grapple with CTV inventory confidence across the broader digital landscape.