0000916457-17-000022 DEFA14A 2 20170418 20170418 20170418 CALPINE CORP 0000916457 4911 770212977 DE 1231 DEFA14A 34 001-12079 17766385 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 7138302000 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 DEFA14A 1 schedulea14a-definitiveadd.htm DEFINITIVE ADDITIONAL SUPPLEMENTAL MATERIALS FOR 2017 PROXY GRAPHIC 2 calpinelogoa02a01a01.gif CALPINE LOGO