0001181431-12-008232 4 1 20120213 20120213 20120213 PHOEBE SNOW FOUNDATION 0001252480 DE 1231 4 34 001-12079 12600788 591 REDWOOD HIGHWAY STE 3215 MILL VALLEY CA 94941 CALPINE CORP 0000916457 4911 770212977 DE 1231 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 7138302000 717 TEXAS AVENUE SUITE 1000 HOUSTON TX 77002 SPO ADVISORY CORP 0000919468 DE 1231 4 34 001-12079 12600789 591 REDWOOD HIGHWAY SUITE 3215 MILL VALLEY CA 94941 4153836600 591 REDWOOD HIGHWAY SUITE 3215 MILL VALLEY CA 94941 SF ADVISORY CORP 19990329 4 1 rrd334103.xml STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES