0001086364-15-001677 SC 13G 1 20150202 20150202 CALPINE CORP 0000916457 4911 770212977 DE 1231 SC 13G 34 005-48317 15567394 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 7138302000 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 BlackRock Inc. 0001364742 6211 320174431 DE 0226 SC 13G 55 EAST 52ND STREET NEW YORK NY 10055 212-810-5300 55 EAST 52ND STREET NEW YORK NY 10055 BlackRock, Inc. 20060929 New BlackRock, Inc. 20060601 SC 13G 1 calpine.corp.txt