EDF Energy is one of the largest energy companies in the United Kingdom. It is a wholly-owned subsidiary of the French company, EDF Group. The company was established in 2002 and is headquartered in London, England.

EDF Energy provides electricity and gas to millions of customers in the UK. The company offers a wide range of products and services to residential, business, and industrial customers. Its main products include different energy tariffs, smart meters, and various energy-saving solutions.

EDF Energy also offers services like energy efficiency advice and home insulation. On a global scale, EDF Energy operates as part of the larger EDF Group, which is a leading player in the energy industry worldwide. The EDF Group has a presence across Europe, North America, South America, Africa, the Middle East, and Asia.

Regarding subsidiaries, EDF Energy oversees the operations of EDF Renewables in the UK. This subsidiary focuses on renewable energy generation, such as wind and solar power. EDF Energy is a significant player in the UK market.

It is one of the Big Six energy companies in the country, along with British Gas, E. ON, npower, Scottish Power, and SSE. The company has a considerable market share and competes with these companies for customers.

Over the years, EDF Energy has made several noteworthy achievements. It has heavily invested in renewable energy projects to reduce its carbon footprint and contribute to the UK's renewable energy goals. The company has also focused on developing smart grid technologies and improving energy efficiency.

In recent years, EDF Energy has faced some challenges, such as regulatory changes, increasing competition, and the need to transition to low-carbon energy sources. However, the company is actively adapting to these changes by expanding its renewable generation capacity and offering more sustainable energy options to its customers. As of the latest information available, EDF Energy continues to be a dominant player in the UK energy market.

The company's focus on renewable energy and commitment to sustainability positions it well for future growth and continued success in the ever-evolving energy industry