Skip to main content
Please enable JavaScript in your web browser to get the best experience.
Open menu
Main navigation
About us
Back
About us
Our role and responsibilities
Our strategy and priorities
Our structure and leadership
Contact us
Corporate policies
Corporate publications
Working for Ofgem
Ofgem annual reports
Ofgem whistleblowing annual reports
Information for consumers
Back
Information for consumers
Energy advice for households
Energy advice for businesses
Environmental and social schemes
Back
Environmental and social schemes
Boiler Upgrade Scheme (BUS)
Counter fraud for environmental and social programmes
Domestic Renewable Heat Incentive (Domestic RHI)
Energy Company Obligation (ECO)
Feed-in Tariffs (FIT)
Great British Insulation Scheme
Green Gas Support Scheme (GGSS) and Green Gas Levy (GGL)
Non-Domestic Renewable Heat Incentive (RHI)
Northern Ireland Non-Domestic Renewable Heat Incentive
Offtaker of Last Resort (OLR)
Renewables and CHP Register
Renewables Energy Guarantees Origin (REGO)
Renewables Obligation (RO)
Smart Export Guarantee (SEG)
Warm Home Discount (WHD)
Previous Environmental and Social Schemes
Energy policy and regulation
Back
Energy policy and regulation
Industry licensing
Back
Industry licensing
Licences and licence conditions
How to become a licensed gas or electricity company
Licence modifications, derogations, revocations and transfers
Lists of licensed companies
Industry codes and standards
Measuring the impact of our policy decisions
Compliance and enforcement
Engagement
Back
Engagement
Consultations
Calls for Input
Forums and working groups
Policy and regulatory programmes
Back
Policy and regulatory programmes
Active programmes
Inactive programmes
Policy and regulatory publications
Back
Policy and regulatory publications
Company publications
Licence and sectoral publications
Industry codes publications
Energy data and research
Back
Energy data and research
Data portal
Energy data publications
Ofgem consumer research
News and views
Back
News and views
Press releases
Blog
News
Speeches and presentations
Show search
Callisto Energy Supply Limited
You are in the section
Energy policy and regulation
Company publications
Associated company names
Extra Energy Supply Limited
Registered company number
8053154
Licence held
Electricity Supply Licence Gas Supplier Licence
Publications and updates
Close
