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 | 271.4 GWh | Dec 2025 | Oct 2025 | $3.41M | |
| Oberon Solar Ia | Irvine, CA | Independent Power Producer | 1 | 320.6 GWh | Dec 2025 | - | ||
| Oberon Solar Ib | Irvine, CA | Independent Power Producer | 1 | 65.4 GWh | Dec 2025 | - | ||
| Occidental Chemical Corporation | Houston, TX | Industrial | 2 | 5.9 TWh | Dec 2025 | Sep 2025 | $36.49M | |
| Ocean County Utilities AUTH | Bayville, NJ | Political Subdivision | 1 | 1.7 GWh | Dec 2025 | - | ||
| Odyssey Operating Services | Charlotte, NC | Independent Power Producer | 1 | 3.8 TWh | Dec 2025 | - | ||
| Oe_tn1 | Miami, FL | Independent Power Producer | 1 | 167.5 GWh | Dec 2025 | - | ||
| OEE Xvii, LLC | Findlay, OH | Industrial | 1 | 3.5 GWh | Dec 2025 | - | ||
| Ogden Projects Inc-Haverhill | Morristown, NJ | Independent Power Producer | 1 | 226.8 GWh | Dec 2025 | - | ||
| Oglethorpe Power Corporation | Tucker, GA | Cooperative | 13 | 16.3 TWh | Dec 2025 | Sep 2025 | $34.46M | $3.20M |
| Ohio Power Partners, LLC | Middletown, OH | Independent Power Producer | 1 | 3.5 TWh | Dec 2025 | Oct 2025 | $23.60M | |
| Ohio Valley Electric Corp | Piketon, OH | Investor-Owned Utility | 1 | 5.9 TWh | Dec 2025 | Oct 2025 | $196.57M | $113.71M |
| Oklahoma Gas & Electric Co | Oklahoma City, OK | Investor-Owned Utility | 22 | 18.6 TWh | Dec 2025 | Oct 2025 | $116.11M | $18.97M |
| Old 300 Solar Center, LLC | Austin, TX | Independent Power Producer | 1 | 952.9 GWh | Dec 2025 | - | ||
| Old Dominion Electric Coop | Glen Allen, VA | Cooperative | 10 | 4.2 TWh | Dec 2025 | Oct 2025 | $437.30M | $58.66M |
| Old Settler Wind, LLC | Houston, TX | Independent Power Producer | 1 | 590.4 GWh | Dec 2025 | - | ||
| Old Trail Wind Farm LLC | Ellsworth, IL | Independent Power Producer | 1 | 622.4 GWh | Dec 2025 | Oct 2025 | $2.77M | |
| OLIN Blue Cube Operations | Freeport, TX | Industrial | 1 | 1.9 TWh | Dec 2025 | - | ||
| Oliver Wind III, LLC | Juno Beach, FL | Independent Power Producer | 1 | 419.8 GWh | Dec 2025 | Sep 2025 | $2.15M | |
| Oliver Wind IV, LLC | Juno Beach, FL | Independent Power Producer | 1 | 839.2 GWh | Dec 2025 | Oct 2025 | $2.70M | |
| Omaha Public Power District | Omaha, NE | Political Subdivision | 11 | 8.3 TWh | Dec 2025 | Oct 2025 | $83.73M | $25.12M |
| Omnis Pleasants, LLC | Santa Barbara, CA | Independent Power Producer | 1 | 399.6 GWh | Dec 2025 | Oct 2025 | $7.21M | |
| Oneta Power LLC | Broken Arrow, OK | Independent Power Producer | 1 | 5.3 TWh | Dec 2025 | Oct 2025 | $72.96M | |
| Ontelaunee Energy Center | Reading, PA | Independent Power Producer | 1 | 4.4 TWh | Dec 2025 | - | ||
| Onward Energy | New York, NY | Independent Power Producer | 41 | 6.6 TWh | Dec 2025 | - | ||
| Orange Grove | Boston, MA | Independent Power Producer | 1 | 172.6 GWh | Dec 2025 | - | ||
| Orchard Ranch Solar, LLC | Boston, MA | Independent Power Producer | 1 | 46.7 GWh | Dec 2025 | - | ||
| Oregon Clean Energy Center | Oregon, OH | Independent Power Producer | 1 | 6.2 TWh | Dec 2025 | Oct 2025 | $58.02M | |
| Oregon State University | Corvallis, OR | State-Owned Utility | 1 | 37.4 GWh | Dec 2025 | - | ||
| Oriana Solar LLC | Boston, MA | Independent Power Producer | 1 | 122.5 GWh | Dec 2025 | - | ||
| Origis Energy USA, Inc | Miami, FL | Independent Power Producer | 21 | 631.1 GWh | Dec 2025 | - | ||
| Orlando Utilities COMM | Orlando, FL | Municipally-Owned Utility | 5 | 4.3 TWh | Dec 2025 | Sep 2025 | $19.92M | |
| Ormat Nevada Inc. | Reno, NV | Independent Power Producer | 28 | 3.4 TWh | Dec 2025 | - | ||
| ORNI 30 LLC | Reno, NV | Independent Power Producer | 1 | 673.0 MWh | Dec 2025 | - | ||
| Orsted Onshore North America | Austin, TX | Independent Power Producer | 1 | 1.2 TWh | Dec 2025 | - | ||
| Orsted Wind Power North America LLC | Boston, MA | Independent Power Producer | 3 | 582.3 GWh | Dec 2025 | - | ||
| Osborn Wind Energy LLC | Juno Beach, FL | Independent Power Producer | 1 | 734.5 GWh | Dec 2025 | Sep 2025 | $5.23M | |
| Osceola Windpower LLC | Juno Beach, FL | Independent Power Producer | 2 | 641.8 GWh | Dec 2025 | Jun 2019 | ||
| Oswego Harbor Power | Oswego, NY | Independent Power Producer | 1 | 92.1 GWh | Dec 2025 | Sep 2025 | $29.55M | |
| OTAY Mesa Energy Center LLC | Dublin, CA | Independent Power Producer | 1 | 1.7 TWh | Dec 2025 | Oct 2025 | $16.15M | |
| Otter Creek Ethanol LLC - Poet Ashton | Ashton, IA | Industrial | 1 | 48.9 GWh | Dec 2025 | - | ||
| Otter Tail Power Co | Fergus Falls, MN | Investor-Owned Utility | 21 | 5.9 TWh | Dec 2025 | Oct 2025 | $30.22M | $869.20k |
| Oxnard City Of | Oxnard, CA | Municipally-Owned Utility | 1 | 4.3 GWh | Dec 2025 | - | ||
| Oxy VInyls LP | Houston, TX | Industrial | 2 | 2.1 TWh | Dec 2025 | - | ||
| Ozark Hydro Management, LLC | Locust Grove, AR | Independent Power Producer | 3 | 49.9 GWh | Dec 2025 | - | ||
| Ormond Beach Power, LLC | Houston, TX | Independent Power Producer | 1 | 18.8 GWh | Aug 2025 | Sep 2025 | $40.40M | |
| O'Neill Creek Solar LLC | Beaverton, OR | Independent Power Producer | 1 | 3.4 GWh | Dec 2024 | - | ||
| Oak Leaf Solar V LLC | Bethesda, MD | Independent Power Producer | 1 | 2.0 GWh | Dec 2024 | - | ||
| Oakdale&South San Joaquin Irrigation D. | Pinecrest, CA | Political Subdivision | 3 | 393.2 GWh | Dec 2024 | - | ||
| Oakley Solar Project LLC | Walnut Creek, CA | Commercial | 1 | 2.0 GWh | Dec 2024 | - | ||
| Oakwood Solar, LLC | Asheville, NC | Independent Power Producer | 1 | 10.2 GWh | Dec 2024 | - | ||
| Oberlin College | Oberlin, OH | Commercial | 1 | 2.7 GWh | Dec 2024 | - | ||
| Occidental College | LOS Angeles, CA | Independent Power Producer | 1 | 1.4 GWh | Dec 2024 | - | ||
| Occidental Permian Ltd | Houston, TX | Industrial | 1 | 155.8 GWh | Dec 2024 | - | ||
| Ocean State Power Co | Harrisville, RI | Independent Power Producer | 2 | 2.2 TWh | Dec 2024 | Sep 2025 | $27.03M | |
| OCI Energy LLC | San Antonio, TX | Independent Power Producer | 5 | 101.7 GWh | Dec 2024 | - | ||
| Oconto Electric Cooperative | Oconto Falls, WI | Cooperative | 1 | 6.0 GWh | Dec 2024 | Sep 2025 | $2.15M | |
| Odessa Energy Services LLC | Hermiston, OR | Independent Power Producer | 3 | 21.0 GWh | Dec 2024 | - | ||
| ODOM Solar, LLC | Nashville, TN | Independent Power Producer | 1 | 47.1 GWh | Dec 2024 | Sep 2025 | $355.09k | |
| Odyssey Solar, LLC | Asheville, NC | Independent Power Producer | 1 | 12.5 GWh | Dec 2024 | Sep 2025 | $238.51k | |
| Oe Il Solar 3, LLC | Boston, MA | Independent Power Producer | 1 | 4.7 GWh | Dec 2024 | - | ||
| OEE XIX, LLC | Findlay, OH | Industrial | 1 | 7.6 GWh | Dec 2024 | - | ||
| OEE Xxiii LLC | Findlay, OH | Industrial | 1 | 6.5 GWh | Dec 2024 | - | ||
| OEE Xxiv LLC | Findlay, OH | Industrial | 1 | 2.3 GWh | Dec 2024 | - | ||
| OEE XXV LLC | Findlay, OH | Industrial | 1 | 4.2 GWh | Dec 2024 | - | ||
| OEE XXVI LLC | Findlay, OH | Independent Power Producer | 1 | 7.4 GWh | Dec 2024 | - | ||
| OEE Xxviii LLC | Findlay, OH | Independent Power Producer | 1 | 6.7 GWh | Dec 2024 | - | ||
| OEE XXX LLC | Findlay, OH | Independent Power Producer | 1 | 4.8 GWh | Dec 2024 | - | ||
| OEE Xxxiii LLC | Findlay, OH | Independent Power Producer | 1 | 7.2 GWh | Dec 2024 | - | ||
| Off Airport Road - West, LLC | Boston, MA | Independent Power Producer | 1 | 6.9 GWh | Dec 2024 | - | ||
| Ogburn Solar, LLC | Jersey City, NJ | Independent Power Producer | 1 | 4.5 GWh | Dec 2024 | - | ||
| Ok Produce | Fresno, CA | Commercial | 1 | 3.7 GWh | Dec 2024 | - | ||
| Oklahoma Municipal Power Authority | Edmond, OK | State-Owned Utility | 5 | 277.6 GWh | Dec 2024 | Sep 2025 | $7.12M | |
| Old Court RD Solar, LLC | Arlington, VA | Independent Power Producer | 1 | 3.1 GWh | Dec 2024 | - | ||
| Old Frontier Solar III PV, LLC | Boston, MA | Independent Power Producer | 1 | 4.1 GWh | Dec 2024 | - | ||
| Old Gold Energy Center, LLC | Joice, IA | Independent Power Producer | 1 | 89.1 GWh | Dec 2024 | Oct 2025 | $121.04k | |
| Old Mill Solar | Juno Beach, FL | Independent Power Producer | 1 | 7.5 GWh | Dec 2024 | - | ||
| Oleander Holdings LLC | Juno Beach, FL | Independent Power Producer | 1 | 491.0 GWh | Dec 2024 | - | ||
| Olinda Trail Solar LLC | San Francisco, CA | Independent Power Producer | 1 | 2.2 GWh | Dec 2024 | - | ||
| Olmstead Solar II, LLC | San Francisco, CA | Independent Power Producer | 1 | 4.6 GWh | Dec 2024 | - | ||
| Olmsted County Public Works | Rochester, MN | Municipally-Owned Utility | 1 | 50.6 GWh | Dec 2024 | - | ||
| Olney Solar II, LLC | Boston, MA | Independent Power Producer | 1 | 4.6 GWh | Dec 2024 | - | ||
| OLS Energy-Agnews Inc. | Dublin, CA | Independent Power Producer | 1 | 14.1 GWh | Dec 2024 | Oct 2025 | $0 | |
| Olsen Power Partners | Annapolis, MD | Independent Power Producer | 1 | 13.8 GWh | Dec 2024 | - | ||
| One Ten Partners, LLC | LOS Angeles, CA | Independent Power Producer | 1 | 6.4 GWh | Dec 2024 | - | ||
| Oneida DG Solar, LLC | Juno Beach, FL | Independent Power Producer | 2 | 5.1 GWh | Dec 2024 | - | ||
| Onyx Asset Services Group | New York, NY | Independent Power Producer | 29 | 84.4 GWh | Dec 2024 | - | ||
| Open Mountain Energy LLC. | LEHI, UT | Independent Power Producer | 1 | 19.5 GWh | Dec 2024 | - | ||
| Oppidum Renewables USA, LLC | Pittsburgh, PA | Independent Power Producer | 18 | 133.2 GWh | Dec 2024 | - | ||
| Optimum Wind 3 LLC | Irvington, NY | Independent Power Producer | 1 | 11.2 GWh | Dec 2024 | - | ||
| Optimum Wind 4 LLC | Irvington, NY | Independent Power Producer | 1 | 11.3 GWh | Dec 2024 | - | ||
| Optimum Wind 5 LLC | Irvington, NY | Independent Power Producer | 1 | 9.5 GWh | Dec 2024 | - | ||
| Optimum Wind 6 LLC | Irvington, NY | Independent Power Producer | 1 | 9.6 GWh | Dec 2024 | - | ||
| Optimum Wind 7 LLC | Irvington, NY | Independent Power Producer | 1 | 12.0 GWh | Dec 2024 | - | ||
| Or Solar 2, LLC | Jersey City, NJ | Independent Power Producer | 1 | 13.2 GWh | Dec 2024 | - | ||
| Orange County Sanitation DIST | Fountain Valley, CA | Political Subdivision | 2 | 109.0 GWh | Dec 2024 | - | ||
| Orange Grove Energy LP | Schaumburg, IL | Independent Power Producer | 1 | 23.9 GWh | Dec 2024 | Sep 2025 | $3.47M | |
| Orcal Geothermal, Inc | Reno, NV | Independent Power Producer | 2 | 755.2 GWh | Dec 2024 | - | ||
| Orchard Windfarm, LLC | New York, NY | Independent Power Producer | 4 | 122.2 GWh | Dec 2024 | - | ||
| Oregon Environmental Industries LLC | Medford, OR | Independent Power Producer | 1 | 20.3 GWh | Dec 2024 | - |
Top Power Plants in United States
| Plant | Location | Annual Generation | Initial Operation Date | Last Update | Fuel Types |
|---|---|---|---|---|---|
| Arkansas Nuclear One | Russellville, Arkansas | 15 TWh | Nov 1974 | Dec 2025 | Nuclear |
| Barry | Bucks, Alabama | 12 TWh | Jan 1954 | Dec 2025 | Natural Gas : 94.9% Bituminous Coal : 5.1% |
| Beaver Valley | Shippingport, Pennsylvania | 15 TWh | Aug 1976 | Dec 2025 | Nuclear |
| Bowen | Cartersville, Georgia | 12 TWh | Sep 1971 | Dec 2025 | Bituminous Coal : 99.8% |
| Braidwood Generation Station | Braceville, Illinois | 20 TWh | Jun 1988 | Dec 2025 | Nuclear |
| Browns Ferry | Decatur, Alabama | 30 TWh | Jul 1974 | Dec 2025 | Nuclear |
| Brunswick Nuclear | Southport, North Carolina | 16 TWh | Oct 1975 | Dec 2025 | Nuclear |
| Byron Generating Station | Byron, Illinois | 20 TWh | Aug 1985 | Dec 2025 | Nuclear |
| Calvert Cliffs Nuclear Power Plant | Lusby, Maryland | 15 TWh | Apr 1975 | Dec 2025 | Nuclear |
| Catawba | York, South Carolina | 19 TWh | May 1985 | Dec 2025 | Nuclear |
| Comanche Peak | Glen Rose, Texas | 20 TWh | Jul 1990 | Dec 2025 | Nuclear |
| Crystal River | Crystal River, Florida | 15 TWh | Sep 1966 | Dec 2025 | Natural Gas : 74.9% Bituminous Coal : 24.9% |
| Diablo Canyon | Avila Beach, California | 18 TWh | Apr 1985 | Dec 2025 | Nuclear |
| Donald C Cook | Bridgman, Michigan | 18 TWh | Jul 1975 | Dec 2025 | Nuclear |
| Dresden Generating Station | Morris, Illinois | 15 TWh | Jul 1970 | Dec 2025 | Nuclear |
| Edwin I Hatch | Baxley, Georgia | 14 TWh | Nov 1975 | Dec 2025 | Nuclear |
| Gavin Power, LLC | Cheshire, Ohio | 13 TWh | Sep 1974 | Dec 2025 | Bituminous Coal : 99.5% Distillate Fuel Oil : 0.5% |
| Grand Coulee | Grand Coulee, Washington | 16 TWh | Feb 1941 | Dec 2025 | Water |
| Grand Gulf | Port Gibson, Mississippi | 11 TWh | Jun 1985 | Dec 2025 | Nuclear |
| H Allen Franklin Combined Cycle | Smiths, Alabama | 12 TWh | May 2002 | Dec 2025 | Natural Gas |
| Hines Energy Complex | Bartow, Florida | 12 TWh | Mar 1999 | Dec 2025 | Natural Gas |
| Jack McDonough | Smyrna, Georgia | 17 TWh | Apr 1971 | Dec 2025 | Natural Gas |
| James H Miller Jr | Quinton, Alabama | 19 TWh | Sep 1978 | Dec 2025 | Subbituminous Coal : 99.2% Natural Gas : 0.8% |
| Joseph M Farley | Columbia, Alabama | 13 TWh | Nov 1977 | Dec 2025 | Nuclear |
| Labadie | Labadie, Missouri | 17 TWh | May 1970 | Dec 2025 | Subbituminous Coal : 99.9% |
| LaSalle Generating Station | Marseilles, Illinois | 19 TWh | Dec 1983 | Dec 2025 | Nuclear |
| Limerick | Sanatoga, Pennsylvania | 19 TWh | Jan 1986 | Dec 2025 | Nuclear |
| McGuire | Huntersville, North Carolina | 20 TWh | Aug 1981 | Dec 2025 | Nuclear |
| Millstone | Waterford, Connecticut | 17 TWh | Nov 1975 | Dec 2025 | Nuclear |
| Monroe (MI) | Monroe, Michigan | 16 TWh | Oct 1969 | Dec 2025 | Subbituminous Coal : 74.7% Bituminous Coal : 16.0% Petroleum Coke : 9.1% |
| Nine Mile Point Nuclear Station | Lycoming, New York | 16 TWh | Nov 1969 | Dec 2025 | Nuclear |
| North Anna | Mineral, Virginia | 15 TWh | May 1978 | Dec 2025 | Nuclear |
| Oconee | Seneca, South Carolina | 22 TWh | Jun 1973 | Dec 2025 | Nuclear |
| Okeechobee Clean Energy Center | Okeechobee, Florida | 12 TWh | Feb 2019 | Dec 2025 | Natural Gas |
| Palo Verde | Wintersburg, Arizona | 31 TWh | Dec 1985 | Dec 2025 | Nuclear |
| Peach Bottom | Delta, Pennsylvania | 22 TWh | Jun 1974 | Dec 2025 | Nuclear |
| Prairie State Generating Station | Marissa, Illinois | 12 TWh | May 2012 | Dec 2025 | Bituminous Coal : 99.8% |
| PSEG Salem Generating Station | Hancocks Bridge, New Jersey | 19 TWh | May 1971 | Dec 2025 | Nuclear |
| Quad Cities Generating Station | Cordova, Illinois | 15 TWh | Nov 1972 | Dec 2025 | Nuclear |
| Robert Moses Niagara | Lewiston, New York | 14 TWh | Dec 1960 | Dec 2025 | Water |
| Sequoyah | Soddy Daisy, Tennessee | 13 TWh | Jun 1981 | Dec 2025 | Nuclear |
| South Texas Project | Wadsworth, Texas | 22 TWh | Jul 1988 | Dec 2025 | Nuclear |
| St Lucie | Jensen Beach, Florida | 16 TWh | Apr 1976 | Dec 2025 | Nuclear |
| Surry | Surry, Virginia | 13 TWh | Nov 1972 | Dec 2025 | Nuclear |
| TalenEnergy Susquehanna | Berwick, Pennsylvania | 19 TWh | May 1983 | Dec 2025 | Nuclear |
| Turkey Point | Homestead, Florida | 21 TWh | Mar 1967 | Dec 2025 | Nuclear : 68.7% Natural Gas : 31.3% |
| Vogtle | Waynesboro, Georgia | 37 TWh | Apr 1987 | Dec 2025 | Nuclear |
| W A Parish | Thompsons, Texas | 16 TWh | May 1958 | Dec 2025 | Subbituminous Coal : 83.3% Natural Gas : 16.7% |
| Watts Bar Nuclear Plant | Spring City, Tennessee | 16 TWh | Apr 1996 | Dec 2025 | Nuclear |
| West County Energy Center | Loxahatchee, Florida | 19 TWh | Jul 2009 | Dec 2025 | Natural Gas : 99.9% |