**[Google Wins a Key Antitrust Battle, Ad Business Avoids Breakup]** Deep Tide TechFlow reports that on September 3, a federal judge rejected the U.S. Department of Justice's request to break up Google’s (GOOG.O) online advertising business. This ruling is historically significant, effectively putting an end to nearly 20 years of antitrust risks for Google, a subsidiary of Alphabet. As early as the Obama administration, U.S. government enforcement agencies had considered filing antitrust lawsuits against Google. However, judges have consistently shown strong resistance to breaking up companies, viewing such remedies as overly aggressive. Wednesday’s ruling is the latest example. U.S. Judge Leonie Brinkema adopted a more restrained approach in deciding how to penalize Google. Last year, she ruled that Google had illegally monopolized the complex online advertising market that provides ads for websites. The U.S. Department of Justice argued that forcing Google to sell its ad exchange platform was the only way to curb its market dominance and open the market to new competitors. Brinkema disagreed. In a ruling spanning just two pages, she adopted alternative measures to limit Google’s control over publishers’ use of its advertising technology.