0000916457-17-000071 4 1 20170510 20170512 20170512 CALPINE CORP 0000916457 4911 770212977 DE 1231 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 7138302000 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 MORELAND W BENJAMIN 0001157962 4 34 001-12079 17838873 4 1 wf-form4_149462024746998.xml FORM 4