Calpine

For the town in California, see Calpine, California.
Calpine Corporation
Company typePrivate
IndustryEnergy
Founded1984 (1984)
FounderPeter Cartwright
Headquarters
Calpine Center
Houston, Texas
,
U.S.
Key people
  • Andrew Novotny (CEO)
  • Thad Miller (CFO)
Revenue US$10.072 billion (2019)
US$770 million (2019)
Total assetsUS$16.062 billion (2018)
OwnerConstellation Energy
Number of employees
2,256 (2019)
Websitewww.calpine.com

Calpine Corporation is a Fortune 500 company based in Houston, Texas. It is the largest generator of electricity from natural gas and geothermal energy in the United States, with operations in competitive power markets.

In January 2026, Constellation Energy announced it had completed its acquisition of Calpine for $16.4 billion.

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