Directory of Electric Companies in the United States
| Company Name | Company Location | Utility Type | Power Plants | EIA Annual Generation | EIA Latest Generation | FERC Lastest Date | FERC 2025Q2 Seller Transactions | FERC 2025Q2 Buyer Transactions |
|---|---|---|---|---|---|---|---|---|
| Oak Solar LLC | Stamford, CT | Independent Power Producer | 1 | 285.6 GWh | Jun 2026 | Jul 2025 | $3.41M | |
| Oberon Solar Ia | Irvine, CA | Independent Power Producer | 1 | 282.0 GWh | Jun 2026 | - | ||
| Oberon Solar Ib | Irvine, CA | Independent Power Producer | 1 | 51.9 GWh | Jun 2026 | - | ||
| Occidental Chemical Corporation | Houston, TX | Industrial | 2 | 6.1 TWh | Jun 2026 | Sep 2025 | $36.49M | |
| Ocean County Utilities AUTH - (NJ) | Bayville, NJ | Political Subdivision | 1 | 1.3 GWh | Jun 2026 | - | ||
| Odyssey Operating Services | Charlotte, NC | Independent Power Producer | 1 | 3.7 TWh | Jun 2026 | - | ||
| Oe_tn1 | Miami, FL | Independent Power Producer | 1 | 203.7 GWh | Jun 2026 | - | ||
| Ogden Projects Inc-Haverhill | Morristown, NJ | Independent Power Producer | 1 | 314.3 GWh | Jun 2026 | - | ||
| Oglethorpe Power Corporation | Tucker, GA | Cooperative | 13 | 18.0 TWh | Jun 2026 | Sep 2025 | $34.46M | $3.20M |
| Ohio Power Partners, LLC | Middletown, OH | Independent Power Producer | 1 | 3.8 TWh | Jun 2026 | Oct 2025 | $23.60M | |
| Ohio Valley Electric Corp | Piketon, OH | Investor-Owned Utility | 1 | 5.6 TWh | Jun 2026 | Oct 2025 | $196.57M | $113.71M |
| Oklahoma Gas & Electric Co | Oklahoma City, OK | Investor-Owned Utility | 22 | 18.6 TWh | Jun 2026 | Oct 2025 | $116.11M | $18.97M |
| Old 300 Solar Center, LLC | Austin, TX | Independent Power Producer | 1 | 986.4 GWh | Jun 2026 | - | ||
| Old Dominion Electric Coop | Glen Allen, VA | Cooperative | 10 | 4.9 TWh | Jun 2026 | Oct 2025 | $437.30M | $58.66M |
| Old Settler Wind, LLC | Houston, TX | Independent Power Producer | 1 | 614.3 GWh | Jun 2026 | - | ||
| Old Trail Wind Farm LLC | Ellsworth, IL | Independent Power Producer | 1 | 598.9 GWh | Jun 2026 | Jul 2025 | $2.77M | |
| OLIN Blue Cube Operations | Freeport, TX | Industrial | 1 | 2.0 TWh | Jun 2026 | - | ||
| Oliver Wind III, LLC | Juno Beach, FL | Independent Power Producer | 1 | 399.8 GWh | Jun 2026 | Sep 2025 | $2.15M | |
| Oliver Wind IV, LLC | Juno Beach, FL | Independent Power Producer | 1 | 875.6 GWh | Jun 2026 | Oct 2025 | $2.70M | |
| Omaha Public Power District | Omaha, NE | Political Subdivision | 11 | 9.9 TWh | Jun 2026 | Oct 2025 | $83.73M | $24.99M |
| Omnis Pleasants, LLC | Santa Barbara, CA | Independent Power Producer | 1 | 1.2 TWh | Jun 2026 | Oct 2025 | $7.21M | |
| Oneta Power LLC | Broken Arrow, OK | Independent Power Producer | 1 | 4.8 TWh | Jun 2026 | Oct 2025 | $71.67M | |
| Onsite Partners, LLC | Columbus, OH | Independent Power Producer | 45 | 152.1 GWh | Jun 2026 | - | ||
| Ontelaunee Energy Center | Reading, PA | Independent Power Producer | 1 | 4.0 TWh | Jun 2026 | - | ||
| Onward Energy | New York, NY | Independent Power Producer | 41 | 6.6 TWh | Jun 2026 | - | ||
| Orange Grove | Boston, MA | Independent Power Producer | 1 | 328.7 GWh | Jun 2026 | - | ||
| Orchard Ranch Solar, LLC | Miami, FL | Independent Power Producer | 1 | 52.1 GWh | Jun 2026 | - | ||
| Oregon Clean Energy Center | Oregon, OH | Independent Power Producer | 1 | 6.3 TWh | Jun 2026 | Oct 2025 | $58.02M | |
| Oregon State University | Corvallis, OR | State-Owned Utility | 1 | 36.2 GWh | Jun 2026 | - | ||
| Oriana Solar LLC | Boston, MA | Independent Power Producer | 1 | 315.7 GWh | Jun 2026 | - | ||
| Origis Energy USA, Inc | Miami, FL | Independent Power Producer | 21 | 2.0 TWh | Jun 2026 | - | ||
| Orlando Utilities COMM | Orlando, FL | Municipally-Owned Utility | 5 | 5.9 TWh | Jun 2026 | Sep 2025 | $19.92M | |
| Ormat Nevada Inc. | Reno, NV | Independent Power Producer | 28 | 3.4 TWh | Jun 2026 | - | ||
| ORNI 30 LLC | Reno, NV | Independent Power Producer | 1 | 50.2 GWh | Jun 2026 | - | ||
| Orsted Onshore North America | Austin, TX | Independent Power Producer | 1 | 1.2 TWh | Jun 2026 | - | ||
| Orsted Wind Power North America LLC | Boston, MA | Independent Power Producer | 3 | 548.9 GWh | Jun 2026 | - | ||
| Osborn Wind Energy LLC | Juno Beach, FL | Independent Power Producer | 1 | 740.5 GWh | Jun 2026 | Sep 2025 | $5.23M | |
| Osceola Windpower LLC | Juno Beach, FL | Independent Power Producer | 2 | 616.6 GWh | Jun 2026 | Jun 2019 | ||
| Oswego Harbor Power | Oswego, NY | Independent Power Producer | 1 | 139.1 GWh | Jun 2026 | Sep 2025 | $29.55M | |
| OTAY Mesa Energy Center LLC | Dublin, CA | Independent Power Producer | 1 | 1.3 TWh | Jun 2026 | Oct 2025 | $16.15M | |
| Otter Creek Ethanol LLC - Poet Ashton | Ashton, IA | Industrial | 1 | 48.4 GWh | Jun 2026 | - | ||
| Otter Tail Power Co | Fergus Falls, MN | Investor-Owned Utility | 21 | 6.5 TWh | Jun 2026 | Oct 2025 | $30.22M | $869.20k |
| Oxy VInyls LP | Houston, TX | Industrial | 2 | 1.8 TWh | Jun 2026 | - | ||
| Ozark Hydro Management, LLC | Locust Grove, AR | Independent Power Producer | 3 | 57.0 GWh | Jun 2026 | - | ||
| Ormond Beach Power, LLC | Houston, TX | Independent Power Producer | 1 | 4.9 GWh | May 2026 | Sep 2025 | $40.40M | |
| O'Neill Creek Solar LLC | Beaverton, OR | Independent Power Producer | 1 | 3.5 GWh | Dec 2025 | - | ||
| Oak Leaf Solar V LLC | Bethesda, MD | Independent Power Producer | 1 | 1.9 GWh | Dec 2025 | - | ||
| Oakdale&South San Joaquin Irrigation D. | Pinecrest, CA | Political Subdivision | 3 | 402.8 GWh | Dec 2025 | - | ||
| Oakley Solar Project LLC | Walnut Creek, CA | Commercial | 1 | 2.2 GWh | Dec 2025 | - | ||
| Oberlin College | Oberlin, OH | Commercial | 1 | 2.6 GWh | Dec 2025 | - | ||
| Occidental College | LOS Angeles, CA | Independent Power Producer | 1 | 1.7 GWh | Dec 2025 | - | ||
| Occidental Permian Ltd | Houston, TX | Industrial | 1 | 124.5 GWh | Dec 2025 | - | ||
| Ocean State Power Co | Harrisville, RI | Independent Power Producer | 2 | 1.7 TWh | Dec 2025 | Sep 2025 | $27.03M | |
| OCI Energy LLC | San Antonio, TX | Independent Power Producer | 5 | 93.0 GWh | Dec 2025 | - | ||
| Oconto Electric Cooperative | Oconto Falls, WI | Cooperative | 1 | 5.7 GWh | Dec 2025 | Sep 2025 | $2.15M | |
| ODOM Solar, LLC | Nashville, TN | Independent Power Producer | 1 | 47.2 GWh | Dec 2025 | Jun 2025 | $355.09k | |
| Oe Il Solar 3, LLC | Boston, MA | Independent Power Producer | 1 | 4.6 GWh | Dec 2025 | - | ||
| Off Airport Road - West, LLC | Boston, MA | Independent Power Producer | 1 | 6.7 GWh | Dec 2025 | - | ||
| Ogburn Solar, LLC | Jersey City, NJ | Independent Power Producer | 1 | 4.5 GWh | Dec 2025 | - | ||
| Ok Produce | Fresno, CA | Commercial | 1 | 3.4 GWh | Dec 2025 | - | ||
| Oklahoma Municipal Power Authority | Edmond, OK | State-Owned Utility | 5 | 232.9 GWh | Dec 2025 | Sep 2025 | $7.12M | |
| Old Court RD Solar, LLC | Arlington, VA | Independent Power Producer | - | 3.4 GWh | Dec 2025 | - | ||
| Old Frontier Solar III PV, LLC | Boston, MA | Independent Power Producer | 1 | 4.0 GWh | Dec 2025 | - | ||
| Old Gold Energy Center, LLC | Joice, IA | Independent Power Producer | 1 | 65.1 GWh | Dec 2025 | Jul 2025 | $121.04k | |
| Old Mill Solar | Juno Beach, FL | Independent Power Producer | 1 | 7.4 GWh | Dec 2025 | - | ||
| Oleander Holdings LLC | Juno Beach, FL | Independent Power Producer | 1 | 598.3 GWh | Dec 2025 | - | ||
| Olinda Trail Solar LLC | Princeton, NJ | Independent Power Producer | 1 | 2.0 GWh | Dec 2025 | - | ||
| Olmstead Solar II, LLC | San Francisco, CA | Independent Power Producer | 1 | 4.7 GWh | Dec 2025 | - | ||
| Olmsted County Public Works - (MN) | Rochester, MN | Municipally-Owned Utility | 1 | 51.9 GWh | Dec 2025 | - | ||
| Olney Solar II, LLC | Boston, MA | Independent Power Producer | 1 | 4.5 GWh | Dec 2025 | - | ||
| OLS Energy-Agnews Inc. | Dublin, CA | Independent Power Producer | 1 | 9.5 GWh | Dec 2025 | Jul 2025 | $0 | |
| Olsen Power Partners | Annapolis, MD | Independent Power Producer | 1 | 16.6 GWh | Dec 2025 | - | ||
| One Ten Partners, LLC | LOS Angeles, CA | Independent Power Producer | 1 | 5.8 GWh | Dec 2025 | - | ||
| Oneenergy, Inc. | Seattle, WA | Independent Power Producer | 22 | 4.2 GWh | Dec 2025 | - | ||
| Onyx Asset Services Group | New York, NY | Independent Power Producer | 41 | 84.4 GWh | Dec 2025 | - | ||
| Open Mountain Energy LLC. | LEHI, UT | Independent Power Producer | 1 | 18.7 GWh | Dec 2025 | - | ||
| Oppidum Renewables USA, LLC | Pittsburgh, PA | Independent Power Producer | 18 | 128.4 GWh | Dec 2025 | - | ||
| Or Solar 2, LLC | Jersey City, NJ | Independent Power Producer | 1 | 20.8 GWh | Dec 2025 | - | ||
| Orange County Sanitation DIST - (Ca) | Fountain Valley, CA | Political Subdivision | 2 | 96.5 GWh | Dec 2025 | - | ||
| Orange Grove Energy LP | Schaumburg, IL | Independent Power Producer | 1 | 9.8 GWh | Dec 2025 | Sep 2025 | $3.47M | |
| Orcal Geothermal, Inc | Reno, NV | Independent Power Producer | 2 | 715.2 GWh | Dec 2025 | - | ||
| Orchard Windfarm, LLC | New York, NY | Independent Power Producer | 4 | 78.4 GWh | Dec 2025 | - | ||
| Oregon Environmental Industries LLC | Medford, OR | Independent Power Producer | 1 | 18.0 GWh | Dec 2025 | - | ||
| Origin Wind Energy LLC | Hennepin, OK | Independent Power Producer | 1 | 295.7 GWh | Dec 2025 | Sep 2025 | $3.17M | |
| Orion Community Solar | Scottsdale, AZ | Independent Power Producer | 1 | 4.6 GWh | Dec 2025 | - | ||
| Orion Energy Group LLC | Oakland, CA | Commercial | 2 | 835.3 GWh | Dec 2025 | - | ||
| Orion Engineered Carbons | Spring, TX | Industrial | 3 | 115.2 GWh | Dec 2025 | - | ||
| Orion Solar I LLC | Independent Power Producer | 1 | 28.7 GWh | Dec 2025 | - | |||
| Orion Solar II, LLC | Boston, MA | Independent Power Producer | 1 | 16.8 GWh | Dec 2025 | - | ||
| Ormat Cove Fort LLC | Reno, NV | Independent Power Producer | 2 | 148.6 GWh | Dec 2025 | Sep 2025 | $3.25M | |
| Ormat Salt Wells LLC | Reno, NV | Independent Power Producer | 1 | 71.9 GWh | Dec 2025 | - | ||
| Ormat Stillwater LLC | Reno, NV | Independent Power Producer | 1 | 101.3 GWh | Dec 2025 | Sep 2025 | $944.67k | |
| ORNI 37 LLC | Luring, NV | Independent Power Producer | 1 | 99.1 GWh | Dec 2025 | Sep 2025 | $1.67M | |
| ORNI 47, LLC | Luning, NV | Independent Power Producer | 1 | 108.7 GWh | Dec 2025 | Sep 2025 | $2.32M | |
| Orrtanna Power, LLC | Chicago, IL | Independent Power Producer | 1 | 408.0 MWh | Dec 2025 | Oct 2025 | $220.70k | |
| Oswego, City Of - (Ny) | Oswego, NY | Municipally-Owned Utility | 1 | 22.2 GWh | Dec 2025 | - | ||
| Oswego County - (Ny) | Oswego, NY | Municipally-Owned Utility | 1 | 6.3 GWh | Dec 2025 | - | ||
| OTIS Elevator Company | Florence, SC | Industrial | 1 | 1.8 GWh | Dec 2025 | - | ||
| Otsego Paper Inc | Otsego, MI | Industrial | 1 | 175.0 GWh | Dec 2025 | - | ||
| Otter River Road Solar LLC | Framingham, MA | Independent Power Producer | 1 | 4.0 GWh | Dec 2025 | - |
Top Power Plants in United States
| Plant | Location | Annual Generation | Initial Operation Date | Last Update | Fuel Types |
|---|---|---|---|---|---|
| Arkansas Nuclear One | Russellville, Arkansas | 14 TWh | Nov 1974 | Jun 2026 | Nuclear |
| Barry | Bucks, Alabama | 13 TWh | Jan 1954 | Jun 2026 | Natural Gas : 97.3% Bituminous Coal : 2.7% |
| Beaver Valley | Shippingport, Pennsylvania | 15 TWh | Aug 1976 | Jun 2026 | Nuclear |
| Bowen | Cartersville, Georgia | 13 TWh | Sep 1971 | Jun 2026 | Bituminous Coal : 99.8% |
| Braidwood Generation Station | Braceville, Illinois | 20 TWh | Jun 1988 | Jun 2026 | Nuclear |
| Browns Ferry | Decatur, Alabama | 31 TWh | Jul 1974 | Jun 2026 | Nuclear |
| Brunswick Nuclear | Southport, North Carolina | 15 TWh | Oct 1975 | Jun 2026 | Nuclear |
| Byron Generating Station | Byron, Illinois | 20 TWh | Aug 1985 | Jun 2026 | Nuclear |
| Calvert Cliffs Nuclear Power Plant | Lusby, Maryland | 15 TWh | Apr 1975 | Jun 2026 | Nuclear |
| Catawba | York, South Carolina | 18 TWh | May 1985 | Jun 2026 | Nuclear |
| Comanche Peak | Glen Rose, Texas | 20 TWh | Jul 1990 | Jun 2026 | Nuclear |
| Crystal River | Crystal River, Florida | 16 TWh | Sep 1966 | Jun 2026 | Natural Gas : 69.8% Bituminous Coal : 30.0% |
| Diablo Canyon | Avila Beach, California | 18 TWh | Apr 1985 | Jun 2026 | Nuclear |
| Donald C Cook | Bridgman, Michigan | 19 TWh | Jul 1975 | Jun 2026 | Nuclear |
| Dresden Generating Station | Morris, Illinois | 15 TWh | Jul 1970 | Jun 2026 | Nuclear |
| Edwin I Hatch | Baxley, Georgia | 14 TWh | Nov 1975 | Jun 2026 | Nuclear |
| Gavin Power, LLC | Cheshire, Ohio | 13 TWh | Sep 1974 | Jun 2026 | Bituminous Coal : 99.6% |
| Grand Coulee | Grand Coulee, Washington | 19 TWh | Feb 1941 | Jun 2026 | Water |
| Guernsey Power Station | Byesville, Ohio | 12 TWh | Jan 2023 | Jun 2026 | Natural Gas |
| H Allen Franklin Combined Cycle | Smiths, Alabama | 12 TWh | May 2002 | Jun 2026 | Natural Gas |
| Jack McDonough | Smyrna, Georgia | 19 TWh | Apr 1971 | Jun 2026 | Natural Gas |
| James H Miller Jr | Quinton, Alabama | 19 TWh | Sep 1978 | Jun 2026 | Subbituminous Coal : 99.0% Natural Gas : 1.0% |
| Joseph M Farley | Columbia, Alabama | 15 TWh | Nov 1977 | Jun 2026 | Nuclear |
| Labadie | Labadie, Missouri | 15 TWh | May 1970 | Jun 2026 | Subbituminous Coal : 99.9% |
| LaSalle Generating Station | Marseilles, Illinois | 18 TWh | Dec 1983 | Jun 2026 | Nuclear |
| Limerick | Sanatoga, Pennsylvania | 19 TWh | Jan 1986 | Jun 2026 | Nuclear |
| McGuire | Huntersville, North Carolina | 19 TWh | Aug 1981 | Jun 2026 | Nuclear |
| Millstone | Waterford, Connecticut | 17 TWh | Nov 1975 | Jun 2026 | Nuclear |
| Monroe (MI) | Monroe, Michigan | 15 TWh | Oct 1969 | Jun 2026 | Subbituminous Coal : 75.2% Bituminous Coal : 15.7% Petroleum Coke : 8.9% |
| Nine Mile Point Nuclear Station | Lycoming, New York | 16 TWh | Nov 1969 | Jun 2026 | Nuclear |
| North Anna | Mineral, Virginia | 16 TWh | May 1978 | Jun 2026 | Nuclear |
| Oak Grove (TX) | Franklin, Texas | 12 TWh | Mar 2010 | Jun 2026 | Lignite Coal : 99.2% Natural Gas : 0.8% |
| Oconee | Seneca, South Carolina | 22 TWh | Jun 1973 | Jun 2026 | Nuclear |
| Palo Verde | Wintersburg, Arizona | 31 TWh | Dec 1985 | Jun 2026 | Nuclear |
| Peach Bottom | Delta, Pennsylvania | 22 TWh | Jun 1974 | Jun 2026 | Nuclear |
| Prairie State Generating Station | Marissa, Illinois | 12 TWh | May 2012 | Jun 2026 | Bituminous Coal : 99.8% |
| PSEG Salem Generating Station | Hancocks Bridge, New Jersey | 19 TWh | May 1971 | Jun 2026 | Nuclear |
| Quad Cities Generating Station | Cordova, Illinois | 15 TWh | Nov 1972 | Jun 2026 | Nuclear |
| Robert Moses Niagara | Lewiston, New York | 14 TWh | Dec 1960 | Jun 2026 | Water |
| Sequoyah | Soddy Daisy, Tennessee | 18 TWh | Jun 1981 | Jun 2026 | Nuclear |
| South Texas Project | Wadsworth, Texas | 20 TWh | Jul 1988 | Jun 2026 | Nuclear |
| St Lucie | Jensen Beach, Florida | 15 TWh | Apr 1976 | Jun 2026 | Nuclear |
| Surry | Surry, Virginia | 12 TWh | Nov 1972 | Jun 2026 | Nuclear |
| TalenEnergy Susquehanna | Berwick, Pennsylvania | 20 TWh | May 1983 | Jun 2026 | Nuclear |
| Turkey Point | Homestead, Florida | 20 TWh | Mar 1967 | Jun 2026 | Nuclear : 64.6% Natural Gas : 35.4% |
| Union Power Station | El Dorado, Arkansas | 13 TWh | Dec 2002 | Jun 2026 | Natural Gas |
| Vogtle | Waynesboro, Georgia | 37 TWh | Apr 1987 | Jun 2026 | Nuclear |
| W A Parish | Thompsons, Texas | 14 TWh | May 1958 | Jun 2026 | Subbituminous Coal : 81.2% Natural Gas : 18.8% |
| Watts Bar Nuclear Plant | Spring City, Tennessee | 20 TWh | Apr 1996 | Jun 2026 | Nuclear |
| West County Energy Center | Loxahatchee, Florida | 18 TWh | Jul 2009 | Jun 2026 | Natural Gas |