Consolidated Edison, Inc., commonly known as Con Edison or Con Ed, is one of the largest investor-owned energy companies in the United States, with approximately $12 billion in annual revenues as of 2017, and over $48 billion in assets.[2] The company provides a wide range of energy-related products and services to its customers through its subsidiaries: Consolidated Edison Company of New York, Inc., (CECONY), a regulated utility providing electric and gas service in New York City and Westchester County, New York, and steam service in the borough of Manhattan; Orange and Rockland Utilities, Inc., a regulated utility serving customers in a 1,300-square-mile (3,400 km2) area in southeastern New York and northern New Jersey; Con Edison Solutions, an energy services company; Con Edison Energy, a wholesale energy services company; Con Edison Development, a company that owns and operates renewable and energy infrastructure projects, and, Con Edison Transmission, Inc., which invests in electric and natural gas transmission projects. In 2015, electric revenues accounted for 70.35% of consolidated sales (70.55% in 2014); gas revenues 13.61% (14.96% in 2014); steam revenues 5.01% (4.86% in 2014); and non-utility revenues of 11.02% (9.63 in 2014%).[3] Though the company provides an indispensable service to New York residents, a number of major incidents and service problems have negatively impacted its reputation with the public.

Edison International is a public utility holding company based in Rosemead, California. Its subsidiaries include Southern California Edison, and unregulated non-utility business assets Edison Energy. Edison’s roots trace back to Holt & Knupps, a company founded in 1886 as a provider of street lights in Visalia, California.

Exelon Corporation is an American Fortune 100 energy company headquartered in Chicago, Illinois. It generates revenues of approximately $33.5 billion and employs approximately 33,400 people.[2] Exelon is the largest electric parent company in the United States by revenue, the largest regulated utility in the United States with approximately 10 million customers, and also the largest operator of nuclear power plants in the United States.[3] It was created in October 2000 by the merger of PECO Energy Company of Philadelphia and Unicom Corp of Chicago, which owned Commonwealth Edison.[4] Exelon is incorporated in Illinois. [5] Exelon operates regulated utilities in Illinois, Pennsylvania, Maryland, Delaware, New Jersey, and Washington, DC. In October 2009, Exelon had full or majority ownership of 23 nuclear reactors in 14 nuclear power plants.[6][7] Exelon has operations and business activities in 48 states, the District of Columbia and Canada, and is the largest competitive U.S. power generator with approximately 35,500 megawatts of owned capacity.[2][8] Exelon merged with Constellation Energy Group in March 2012 and acquired Pepco Holdings in March 2016.[9][10] Exelon consists of eight main operating subsidiaries with Exelon Generation, a deregulated energy generator, Constellation Energy Group, a deregulated competitive energy supplier, and six regulated utilities, Commonwealth Edison (Illinois), PECO Energy Company (Pennsylvania), Baltimore Gas and Electric (Maryland), Delmarva Power & Light (Delaware and Maryland), Atlantic City Electric (New Jersey), and Potomac Electric Power Company (Washington, DC and Maryland).

NGL Energy Partners LP is a diversified midstream MLP that provides multiple services to producers and end-users, including transportation, storage, blending and marketing of crude oil, NGLs, refined products / renewables, and water solutions.

World Fuel Services Corporation (WFS, World Fuel) is an energy, commodities, and services company based in Miami, Florida. The company ranked No. 91 in the 2018 Fortune 500 list of the largest United States corporations.[2] WFS focuses on the marketing, trading, and financing of aviation, marine and ground transportation fuel products and related services. In 2013, WFS moved into natural gas & power. The global leader in marine refueling, in 2018 WFS sold a record total of 21 billion gallons of fuel for $39.8 billion in revenue.