Donald Rosenthal WG95, 53, passed away unexpectedly in his sleep on February 21 in Denver. Buddy, as he was known to family and friends, spent more than two decades in the technology sector, including in executive roles with AOL, Yahoo, and RealNetworks. He was co-founder and CEO of several early-stage technology companies and was named entrepreneur-in-residence by Charles River Ventures. At the time of his passing, Buddy was chief operating officer of nonprofit One Earth Future.