Well, that didn't last long.... Alphabet claims they don't have the patience (or finances) to wait for the robot company to become profitable:
http://www.engadget.com/2016/03/17/google-is-looking-to-sell-off-boston-dynamics/
http://www.engadget.com/2016/03/17/google-is-looking-to-sell-off-boston-dynamics/