Geothermal handbook: PlanninG and Financing power Generation t e c h n I c a L r e p o r t 2 / 2

F I g u r E 1 . 1 1
Geothermal Industry Structure
STAGE OF DEVELOPMENT
Preliminary Survey ->
Exploration -> Test Drillings -> Field Development -> Engineering -> Construction -> O&M
e.g.: Chevron (US), Enel (Italy)
e.g.: CFE (Mexico), EDC (Philippines)
e.g.: Power 
Eng (US), 
Mannvit 
/ Verkis 
(Iceland)
e.g.: Mitsubishi, 
Fuji, Toshiba 
(all Japan), UTC 
Power (US/
Italy), Alstom 
(France)
e.g.: 
CFE, 
EDC
e.g.: West-JEC (Japan), Geo-t (Germany), 
SKM (New Zealand), GeothermEx (US), 
ISOR (Iceland) 
e.g.: ThermaSource (US), Baker 
Drilling (US), Iceland Drilling Co. 
(Iceland) 
e.g.: Ormat (Israel, US)
e.g.: Reykjavik Energy (Iceland), PT Pertamina (Indonesia)
Source | Authors.
NOTE | The list of companies in the diagram is not comprehensive, and ESMAP/World Bank do not endorse any company mentioned in this report.
In terms of size of installed geothermal plant capacity owned and operated by a single company, the 
market leaders are listed in Table 1.4. The table shows the largest geothermal power producers, with 
installed capacity over 300 MW. In most cases, these companies are both steam field operators and 
power plant operators. 
T A B L E 1 . 4
Companies Owning Geothermal Capacity Over 300 MW in 2010
COMPANy
COUNTRy
CAPACITy INSTALLED (MW) OPERATIONS IN COUNTRy
Calpine
USA
1,310
USA
Chevron
USA
1,087
Philippines/Indonesia
CFE
Mexico
958
Mexico
Enel Green Power
Italy
915
Italy/Latin America
Ormat
Israel
749
Globally (Binary)
EDC
Philippines
707
Philippines
Terra Gen
USA
337
USA
Contact Energy
New Zealand
335
New Zealand
Reykjavik Energy
Iceland
333
Iceland
CalEnergy Generation
USA
329
USA
Source | Based on Bertani 2010.

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29
C h a p t e r 1
This list of the largest producers of geothermal electricity shows that they are usually either strong 
multinational companies (e.g., Chevron) or large, state-owned electricity utility companies (e.g., CFE 
from Mexico, or former state-owned companies like EDC in the Philippines) for which geothermal 
power generation is a secondary business. In some cases, geothermal power generation will be 
related to the producer’s main business through mining and drilling activities; in other cases, it is linked 
to power generation or transmission.