Duke Energy

• Annual revenue: $24.7 Billion
• Number of employees: 27,605
• Headquarters: Charlotte, NC

Serving 8.2 million customers across the south and central United States, Duke Energy is another one of the biggest energy companies in the country. Duke is one of the utility companies leading the way towards eliminating carbon emissions, intending to be net zero by 2050. On top of that, they’re constantly investing in the exploration of zero-emission power generation technologies, including hydrogen and advanced nuclear.