Exxon Mobil Corp. has appointed activist investor Jeff Ubben and former Comcast Corp. executive Michael Angelakis to its board. (Bloomberg) -- Exxon Mobil Corp. appointed activist investor Jeff Ubben and former Comcast Corp. executive Michael Angelakis to its board following investor criticism of the oil giant for its environmental record and poor financial performance. The additions bring the number of directors on the board to 13, Exxon said in a statement. Bloomberg News first reported Ubben was being considered for the role last month. Exxon’s shares rose as much as 4.8% in pre-market trading in New York on Monday. The contributions of Ubben and Angelakis “will be valued as ExxonMobil advances plans to increase shareholder value by responsibly providing needed energy while playing a leadership role in the energy transition,” Exxon Chief Executive Officer Darren Woods said in the statement.