Board Thread:News and Announcements/@comment-4556650-20140411113722/@comment-4556650-20140729150724

The Aniplex watermark in the trailer actually pretty confirms it is A-1 Pictures.

They're pretty good, having done series like Fairy Tail, Magi, Silver Spoon and SAO. My current season favourite anime Aldnoah.Zero is done by them as well.