10 Biggest Utility Companies Worldwide


Utility companies play a vital role in providing essential services such as electricity, natural gas, water, and sewage to both residential and commercial properties. These companies, though primarily for-profit, are heavily regulated by public authorities due to their critical nature. The utility sector encompasses large corporations offering a broad spectrum of services and niche companies focusing on renewable energy and specialised utilities. This article explores the ten largest utility companies by revenue, with data updated as of December 31, 2022, and market cap as of April 26, 2023. We will delve into their operations, market presence, and financial performance, showcasing how they contribute to meeting the world’s energy needs.

Électricité de France SA (EDF)

Électricité de France SA (EDF) is a French state-owned utility giant with an impressive revenue of $149.5 billion. As a major player in the global electricity industry, EDF offers power generation, transmission, distribution, and trading services. The company’s presence extends beyond France, making it a significant provider of power worldwide. One of EDF’s key achievements is its focus on reducing carbon dioxide emissions. The company’s production is currently 90% free from carbon dioxide emissions worldwide and 96% in France, a noteworthy contribution to environmental sustainability.

Enel SpA (ENLAY)

Based in Rome, Enel SpA has a revenue of $149.3 billion and a market cap of $68.4 billion. This multinational power company is a leading integrated player in the world’s power and gas markets, operating in 30 countries. Enel has a strong emphasis on renewable energy and is a key player in the renewable energy space. With its global presence, Enel continues to prioritize the expansion of renewable energy sources, contributing significantly to the fight against climate change.


E.ON SE is a Germany-based international energy supplier with a revenue of $121.8 billion. The company’s focus lies in power and gas distribution, catering to customers across Europe. Additionally, E.ON operates a customer solutions branch, which offers energy sales, infrastructure, and growth businesses. The company’s diversified portfolio and strategic focus on customer needs have contributed to its position as one of the largest utility companies in Europe.

Engie (ENGIY)

Engie, formerly known as GDF Suez, is a French multinational utility with a revenue of $97.8 billion. The company has operations in electricity generation and distribution, natural gas, and renewable energy. Engie’s commitment to environmental sustainability is evident in its growing portfolio of renewable energy projects worldwide. The company’s name change reflects its transformation and departure from being a state-owned nationalized gas monopoly, allowing it to embrace a more diverse and environmentally responsible approach to utility services.

Iberdrola SA (IBDRY)

Iberdrola SA, a Spanish multinational electric utility, has a revenue of $56.7 billion. The company operates in various regions worldwide, including the U.S., U.K., Europe, Australia, Japan, South America, and Central America. Iberdrola has been a strong proponent of renewable energy, investing heavily in wind power and other clean energy sources. As one of the largest utility companies globally, Iberdrola continues to lead the transition to a more sustainable energy future.

Tokyo Electric Power Co. Holdings (TKECY)

Tokyo Electric Power Co. Holdings, with a revenue of $55.9 billion, is an integrated utilities company that generates and distributes electricity through the Tokyo area and several other regions in Japan. The company utilizes various power sources, including hydroelectric, nuclear, and thermal power, to meet the energy needs of its vast customer base. Despite facing significant challenges in the past, Tokyo Electric Power Co. Holdings remains a critical player in Japan’s energy landscape.

Korea Electric Power Corp. (KEP)

Korea Electric Power Corp. (KEP) is South Korea’s largest electric utility, with a revenue of $55.1 billion. The company generates and distributes electricity for residential and business use, relying on a diverse mix of power sources, including nuclear, thermal, and hydroelectric. Despite facing financial challenges in recent times, KEP continues to play a pivotal role in supplying electricity to the nation.

Centrica PLC (CPYYY)

Centrica PLC is a British multinational that provides electricity and gas services across the U.K. and Europe, with a revenue of $28.8 billion. The company’s diversified business model includes energy supply, services, and solutions. Centrica is focused on delivering value to customers while navigating the evolving energy landscape.

Kansai Electric Power Co. Inc (KAEPY)

Kansai Electric Power Co. Inc provides electricity to customers in Osaka and the surrounding Kansai region in Japan, with a revenue of $28.1 billion. The company’s operations include building and maintaining electric power facilities, relying on various power sources such as thermal, geothermal, nuclear, and hydroelectric.

Exelon Corp. (EXC)

Exelon Corp. operates as a utility services holding company, serving millions of customers in Pennsylvania, Illinois, and several other areas of the U.S. With a revenue of $19.1 billion, Exelon is one of the largest domestic power generators in the U.S. The company’s power capacity is generated through a mix of nuclear, gas, wind, hydroelectric, and solar stations, making it a diverse and influential player in the American energy sector.

Utility Rates in the U.S.:

The state of Hawaii has the highest utility rates in the U.S., with residential electricity costing 44.85 cents per kilowatt-hour. On the other hand, Washington boasts the cheapest electricity, with a cost of 10.59 cents per kilowatt-hour. These varying rates reflect the complex nature of the utility industry and the challenges faced in delivering affordable and sustainable energy to consumers.


Utility companies are indispensable providers of natural gas, electricity, water, and other essential services, serving both residential and commercial customers worldwide. The ten largest utility companies mentioned here play a significant role in powering the world and contributing to energy transition efforts through renewable sources. With their diverse operations, global presence, and focus on environmental sustainability, these utility giants continue to shape the future of the energy sector and ensure that the world’s necessities are met efficiently and responsibly. The utility industry’s relentless pursuit of innovation and commitment to sustainable practices positions it as a critical player in building a greener and more sustainable world.