Centrica 

Established in 1812 in Windsor, UK, and known as Yieldtop plc until its rebranding in December 1996, Centrica plc functions as an integrated energy company. Its operations span the United Kingdom, Ireland, Norway, North America, and other international regions. Centrica is structured across various segments, including British Gas Services & Solutions, British Gas Energy, Centrica Business Solutions, Bord Gáis Energy, Energy Marketing & Trading, and Upstream, through which it delivers a comprehensive range of energy-related services. The company supplies gas and electricity to residential customers and offers associated energy services, alongside generating power from its nuclear assets. For domestic clients, Centrica provides extensive installation, repair, and maintenance for central heating, plumbing, drainage, electrical systems, gas and kitchen appliances, and HVAC equipment, complemented by breakdown services. In the energy markets, Centrica is actively involved in the procurement, trading, and optimization of energy, including the acquisition and sale of liquefied natural gas (LNG). It also develops and provides energy efficiency solutions and technologies, particularly for its residential customer base. Its Upstream segment focuses on the production and processing of oil and gas, developing new fields to maintain reserves, and the construction, ownership, and operation of crucial infrastructure. The company further operates a gas storage facility and a franchise network. Additionally, Centrica's portfolio extends to vehicle leasing, commercial services, insurance, and a variety of energy management products and services, as well as participation in social enterprise investment initiatives.