Centrica 

Centrica plc, founded in 1812 and headquartered in Windsor, UK, operates as an all-encompassing energy company across the United Kingdom, Ireland, Norway, North America, and internationally. Its operations are structured into segments: British Gas Services & Solutions, British Gas Energy, Centrica Business Solutions, Bord Gáis Energy, Energy Marketing & Trading, and Upstream. The company provides gas and electricity to residential consumers and a variety of associated energy services, in addition to generating power from its nuclear facilities. For homeowners, Centrica offers installation, repair, and upkeep for central heating, plumbing and drainage, home electrical systems, gas and kitchen appliances, and HVAC equipment, along with breakdown support. It also delivers energy efficiency solutions and related technologies for domestic use. Beyond residential provisions, Centrica actively participates in the procurement, trading, and optimization of energy, encompassing the acquisition and sale of liquefied natural gas (LNG). Its upstream division is responsible for producing and processing natural gas and oil, developing new fields to sustain reserves, and building, owning, and leveraging infrastructure. The firm also oversees a social enterprise investment fund. Further diversifying its portfolio, Centrica offers vehicle leasing, commercial services, insurance products, and energy management tools and services. It additionally manages gas storage facilities and a franchise network. The company, initially known as Yieldtop plc, rebranded as Centrica plc in December 1996.