What companies are in the energy field?

The energy field encompasses a wide range of companies that are involved in the production, distribution, and consumption of energy. Some examples of companies that are in the energy field include:

1. Oil and gas companies: These companies are involved in the exploration, production, and distribution of oil and natural gas.

2. Electric utilities: These companies generate, transmit and distribute electricity to customers.

3. Renewable energy companies: These companies are involved in the production of energy from renewable sources such as solar, wind, geothermal, and hydroelectric power.

4. Coal and nuclear power companies: These companies produce energy from coal, nuclear and other non-renewable sources

5. Energy service companies: These companies provide energy management and conservation services such as energy audits, energy efficiency, and demand response services.

6. Energy trading and marketing companies: These companies buy and sell energy and related products in wholesale markets.

7. Oilfield services companies: These companies provide services such as drilling, completing, and servicing oil and natural gas wells.

8. Energy technology companies: These companies develop and manufacture technologies for the energy industry such as solar panels, wind turbines, and battery storage systems.

This is not an exhaustive list but some examples of companies that are in the energy field. The field is constantly evolving with the emergence of new technologies and changing market conditions.