Google’s Ad Empire Under Fire as US Antitrust Trial Begins

  • Enforcers allege Alphabet unit monopolized ad technology tools
  • Company denies wrongdoing, says markets are competitive

Justice Department antitrust lawyers say that Google, using its position as a middleman that controls the market from end to end.

Photographer: Gabby Jones/Bloomberg
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Alphabet Inc.’s Google headed back to court Monday to face US Justice Department allegations that it manipulates the $677 billion display advertising market in violation of antitrust laws, just one month after losing a landmark ruling that it illegally dominates online search.

The US and a coalition of eight states accused Google of building up a “trifecta of monopolies” to lock up the technology behind website ads and harm publishers and advertisers — claims Google had denied.