X0306 4 2015-12-31 0 0000916457 CALPINE CORP CPN 0001425785 Fusco Jack A CALPINE CORPORATION 717 TEXAS AVENUE, SUITE. 1000 HOUSTON TX 77002 1 1 0 0 Executive Chairman Common Stock, par value $0.001 per share 2015-12-31 4 F 0 58631 14.47 D 971013 D Common Stock, par value $0.001 per share 500000 I Fusco Energy Investment LLP Represents shares withheld by Calpine Corporation (the "Company") at the Reporting Person's request, as permitted under the Company's Amended and Restated 2008 Equity Incentive Plan to satisfy the Reporting Person's tax withholding obligation in connection with the vesting on Thursday, December 31, 2015 of certain shares of restricted stock previously awarded to the Reporting Person. There was no open market sale of shares by the Reporting Person. Closing market price per share of the Company common stock on the transaction date. /s/ W. Thaddeus Miller by Power of Attorney 2016-01-04