0000916457-05-000045 8-K 1 20050510 8.01 20050516 20050516 CALPINE CORP 0000916457 4911 770212977 DE 1231 8-K 34 001-12079 05835315 50 WEST SAN FERNANDO ST SAN JOSE CA 95113 4089955115 50 W SAN FERNANDO SUITE 500 SAN JOSE CA 95113 8-K 1 o51005.txt