Bridgewater Associates executive Bruce Steinberg and his family were among 12 dead in a Costa Rica plane crash on Sunday. Steinberg was a senior researcher at the firm, the world's largest hedge fund. Costa Rican authorities say strong winds or mechanical failure are likely causes. Bridgewater Associates senior researcher Bruce Steinberg and his family were among 12 who died in a plane crash in Costa Rica on Sunday. Bridgewater founder Ray Dalio noted the loss on his Facebook page, calling Steinberg a "wonderful man." "Right now, we are each processing this devastating tragedy in our own ways," Dalio wrote.