In August, a federal judge ruled that Google illegally holds a monopoly in the search market. The Justice Department in November asked that Google be forced to divest its Chrome internet browser unit. In a separate case, the DOJ accused the company of illegally dominating online ad technology. That trial closed in September and awaits a judge ruling.

That same month, Britain's competition watchdog issued a statement of objections over Google's ad tech practices, which the regulator provisionally found are impacting competition in the U.K.