Federal judge rejects breakup in Google ad-tech monopoly case, imposes behavioral restrictions instead

U.S. District Judge Leonie Brinkema rejected the Justice Department's proposal to force Google to divest its ad exchange (AdX), finding instead that behavioral restrictions could adequately remedy Google's illegal monopoly in publisher ad-server and ad-exchange markets. The ruling removes some structural advantages—including 'first look' and 'last look' practices and pricing controls that favored Google's exchange—and requires competitors to receive AdX bid information in real time, but leaves Google's dominant infrastructure intact. The effectiveness of the remedy depends on whether publishers and advertisers adopt competing technologies; if they remain within Google's ecosystem, the market structure will remain largely unchanged despite the new auction rules.