WASHINGTON—The Federal Trade Commission is gearing up to file a possible antitrust lawsuit against Facebook Inc. by year-end, according to people familiar with the matter, in a case that would challenge the company’s dominant position in social media.
The case preparations come after the FTC has spent more than a year investigating concerns that Facebook has been using its powerful market position to stifle competition, part of a broader effort by U.S. antitrust authorities to examine the conduct of a handful of dominant tech…
