0001140361-13-033422 4 1 20130814 20130816 20130816 CALPINE CORP 0000916457 4911 770212977 DE 1231 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 7138302000 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 Hill Thad 0001351761 4 34 001-12079 131046583 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 4 1 doc1.xml FORM 4