Alphabet Inc.’s Google doesn’t have to sell off its advertising exchange and instead must make its ad tech tools work with those operated by rivals, a federal judge ruled Wednesday, in a move that saves the tech giant from a second bid to force a breakup. US District Judge Leonie Brinkema issued her decision under seal accompanied by a short order rejecting the Justice Department’s bid to force a sale of Google’s AdX. Instead, she ordered proposed behavioral changes to Google’s business without ...