U.S. Readying Possible Facebook Lawsuit in Antitrust Probe (2)

U.S. competition enforcers are preparing a possible antitrust lawsuit against Facebook Inc., according to a person familiar with the matter.

The Federal Trade Commission has been investigating Facebook for more than a year over whether the social media giant has harmed competition and could file a case by the end of the year, said the person, who was granted anonymity because the inquiry is confidential. No final decision has been made, the person added.

A lawsuit by the FTC would mark another major escalation by U.S. officials in their campaign against America’s technology giants, which have come under intense ...