Alphabet’s Google illegally dominated two markets for online advertising technology, a judge ruled Thursday, dealing another blow to the tech giant and paving the way for U.S. antitrust prosecutors to seek a breakup of its advertising products. U.S. District Judge Leonie Brinkema in Alexandria, Virginia, found Google liable for “willfully acquiring and maintaining monopoly power” in markets for publisher ad servers and the market for ad exchanges, which sit between buyers and sellers. Websites use publisher ad servers to store and manage their ad inventories. Antitrust enforcers failed to prove a separate claim that Google had a monopoly in advertiser ad networks, she wrote. Lee-Anne Mulholland, Google’s vice president of regulatory affairs, said Google will appeal the ruling. “We won half of this case and we will appeal the other half,” she said in a statement, adding that the company disagrees with the decision about its publisher tools. “Publishers have…
