U.S. Antitrust Cops Unveil Data Backing Facebook Monopoly Case

U.S. antitrust officials made public for the first time the data they’re using to bolster their case that Facebook Inc. has monopoly power over social networking.

The Federal Trade Commission on Wednesday revealed figures that it said shows Facebook is far and away the most dominant company in the market. The numbers had been redacted in an earlier complaint.

From September 2012 through December 2020, Facebook’s share of time spent by users of social media apps in the U.S. has averaged 92% per month, according to a filing in federal court in Washington. The combined shares of other apps, including ...