Co-founders of Facebook Inc's Instagram, Kevin Systrom and Mike Krieger, have resigned and plan to leave the photo-...

Revenue forecasts from Facebook Inc that alarmed investors, fueling the worst day ever for its shares on Thursday, add t...

Facebook bought Instagram for $1 billion in 2012. Today it has been valued at 100 times that figure.

The social media service said a new video hub called IGTV would allow user to post videos up to an hour in length.