Short answers, pulled from the story.
Double Helix Games was founded in October 2007 through the merger of The Collective and Shiny Entertainment, both owned by Foundation 9 Entertainment. The studio formally adopted the Double Helix name in March 2008.
Double Helix Games was based in Irvine, California, in a sixty-thousand-square-foot office that both predecessor studios relocated to in October 2007.
Amazon acquired Double Helix Games on the 5th of February 2014. The studio was integrated into Amazon Game Studios at the same Irvine, California location.
Double Helix Games developed titles including Silent Hill: Homecoming (2008), G.I. Joe: The Rise of Cobra (2009), Front Mission Evolved (2010), Green Lantern: Rise of the Manhunters (2011), Battleship (2012), Killer Instinct season 1 (2013), and Strider (2014).
Microsoft Studios, the publisher of Killer Instinct, announced it would continue development on the game with a new development partner following Amazon's acquisition of Double Helix in February 2014.
Double Helix Games was formed from the merger of The Collective and Shiny Entertainment, two studios owned by Foundation 9 Entertainment. Shiny Entertainment had been acquired by Foundation 9 in October 2006 under terms requiring it to co-locate with The Collective.