The father of the family killed in a fiery Costa Rican plane crash was a senior investor at Bridgewater Associates, the giant hedge fund headed by billionaire Ray Dalio. Bruce Steinberg — who, along with his wife, Irene, and three sons, Zachary, William and Matthew, was among 12 people killed in the charter plane crash on New Year’s Eve — was a senior member of the Connecticut-based fund’s research team. “The Bridgewater family lost Bruce Steinberg (a senior investor at Bridgewater and a wonderful man) and his family in a plane crash in Costa Rica.