The FTC isn't finished investigating Facebook. The commission is also probing the social network for antitrust violations.
The FTC notified the company about the antitrust investigation last month, according to Facebook's earnings report for the second quarter, which was published on Wednesday. No other details were given.
So far, the FTC hasn't commented on its antitrust probe into Facebook. But on the same day, the commission officially slapped the social network with a $5 billion fine for committing privacy violations with consumers' personal data.
The news also arrives a day after the Justice Department announced it was opening its own antitrust investigation into the biggest online platforms. No companies were named in yesterday's announcement, but the probe will almost certainly examine Facebook, in addition to Amazon and Google, which have all faced accusations of holding a monopoly over their sector of the internet industry.
The antitrust investigations occur when the public's trust in Facebook has plummeted amid the company's past privacy scandals and its control over consumers' data. The controversies have prompted critics, including presidential candidates and a past Facebook co-founder, to call on regulators to break up the social network, which also owns Instagram and WhatsApp.
Despite the company's sinking reputation, Facebook continues to grow. In the second quarter, its monthly active user base was up 8 percent year-over-year, reaching 2.41 billion. The company's revenue in the three-month period also hit $16.8 billion, a 28 percent increase from a year ago.
Although the FTC hasn't commented on its antitrust probe into Facebook, the commission has given a few hints on how it might approach the investigation. In February, the FTC announced it was launching a task force specifically devoted to monitoring competition in the tech industry. Not only will the task force scrutinize anticompetitive conduct, but also mergers that've been made in the industry.