Find out more about the latest Callisto news.

ELEXON’s Performance Assurance Board (PAB) approves the Re-Qualification of Callisto


We are delighted to announce that ELEXON’s Performance Assurance Board (PAB) has approved the Re-Qualification of Callisto UK, in the Non-Half Hourly (NHH) DC/DA market to 20...

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Callisto secures four-year data management contract with OVO Energy


Callisto, the largest provider of regulated data flow management to energy suppliers in the UK, and a part of M Group Services, has further enhanced...

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Callisto expands relationship with E.ON


In March 2020, E.ON announced a new customer platform which will future proof its residential and commercial UK supply business. E.ONnext confirmed that they will leverage...

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M Group Services Energy Retail introduces Callisto


The M Group Services Energy Retail Division, is excited to launch a new, data management business called “Callisto”. Formally embedded within sister operating business Morrison Data...

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using the latest technology.

Experts in settlement performance - since our market inception, we’ve consistently demonstrated an exemplary record, with a robust settlement process that complements our customers best practice for customer services and billing.

Ensuring data security is at the core of our operations. We ensure the integrity and security of customer information by designing security into our systems and processes. This is further supported through the use of secure data centres. 

Our Data Management services are delivered with a comprehensive quality assurance commitment. Business management processes are certified to ISO 9001 and information security management systems are certified to ISO 27001 providing complete security assurance.