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 |
|---|---|---|---|---|---|---|---|---|
| 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 | - | ||
| Oakwood Solar, LLC | Asheville, NC | Independent Power Producer | - | 10.2 GWh | Dec 2024 | - | ||
| Oberlin College | Oberlin, OH | Commercial | 1 | 2.6 GWh | Dec 2025 | - | ||
| Oberon Solar Ia | Irvine, CA | Independent Power Producer | 1 | 295.2 GWh | May 2026 | - | ||
| Oberon Solar Ib | Irvine, CA | Independent Power Producer | 1 | 54.7 GWh | May 2026 | - | ||
| 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 County Utilities AUTH - (NJ) | Bayville, NJ | Political Subdivision | 1 | 1.4 GWh | May 2026 | - | ||
| OCI Energy LLC | San Antonio, TX | Independent Power Producer | 5 | 93.0 GWh | Dec 2025 | - | ||
| Odessa Energy Services LLC | Hermiston, OR | Commercial | - | 21.0 GWh | Dec 2024 | - | ||
| Odyssey Operating Services | Charlotte, NC | Independent Power Producer | 1 | 3.7 TWh | May 2026 | - | ||
| Oe Il Solar 3, LLC | Boston, MA | Independent Power Producer | 1 | 4.6 GWh | Dec 2025 | - | ||
| Oe_tn1 | Miami, FL | Independent Power Producer | 1 | 196.4 GWh | May 2026 | - | ||
| 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 | - | ||
| Ogden Projects Inc-Haverhill | Morristown, NJ | Independent Power Producer | 1 | 287.3 GWh | May 2026 | - | ||
| Ok Produce | Fresno, CA | Commercial | 1 | 3.4 GWh | Dec 2025 | - | ||
| Olcese Water District | Bakersfield, CA | Municipally-Owned Utility | 1 | 25.0 GWh | Nov 2025 | - | ||
| Old 300 Solar Center, LLC | Austin, TX | Independent Power Producer | 1 | 990.2 GWh | May 2026 | - | ||
| Old Court RD Solar, LLC | Arlington, VA | Independent Power Producer | 1 | 3.4 GWh | Dec 2025 | - | ||
| Old Frontier Solar III PV, LLC | Boston, MA | Independent Power Producer | 1 | 4.0 GWh | Dec 2025 | - | ||
| Old Mill Solar | Juno Beach, FL | Independent Power Producer | 1 | 7.4 GWh | Dec 2025 | - | ||
| Old Settler Wind, LLC | Houston, TX | Independent Power Producer | 1 | 604.6 GWh | May 2026 | - | ||
| Oleander Holdings LLC | Juno Beach, FL | Independent Power Producer | 1 | 598.3 GWh | Dec 2025 | - | ||
| OLIN Blue Cube Operations | Freeport, TX | Industrial | 1 | 1.9 TWh | May 2026 | - | ||
| Olinda Trail Solar LLC | San Francisco, CA | 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 | - | ||
| 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 | - | ||
| Oneida DG Solar, LLC | Juno Beach, FL | Independent Power Producer | - | 5.1 GWh | Dec 2024 | - | ||
| Onsite Partners, LLC | Columbus, OH | Independent Power Producer | 37 | 152.1 GWh | May 2026 | - | ||
| Ontelaunee Energy Center | Reading, PA | Independent Power Producer | 1 | 4.0 TWh | May 2026 | - | ||
| Onward Energy | New York, NY | Independent Power Producer | 41 | 6.6 TWh | May 2026 | - | ||
| 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 | Boston, MA | Independent Power Producer | 1 | 297.6 GWh | May 2026 | - | ||
| Orcal Geothermal, Inc | Reno, NV | Independent Power Producer | 2 | 715.2 GWh | Dec 2025 | - | ||
| Orchard Knob Solar LLC | New York, NY | Independent Power Producer | 1 | 283.0 MWh | Nov 2025 | - | ||
| Orchard Ranch Solar, LLC | Miami, FL | Independent Power Producer | 1 | 52.1 GWh | May 2026 | - | ||
| 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 | - | ||
| Oregon State University | Corvallis, OR | State-Owned Utility | 1 | 39.3 GWh | May 2026 | - | ||
| Organic Energy Solutions, Inc. | San Bernardino, CA | Independent Power Producer | 1 | 4.9 GWh | Dec 2024 | - | ||
| Oriana Solar LLC | Boston, MA | Independent Power Producer | 1 | 278.2 GWh | May 2026 | - | ||
| Origis Energy USA, Inc | Miami, FL | Independent Power Producer | 21 | 2.0 TWh | May 2026 | - | ||
| 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 Nevada Inc. | Reno, NV | Independent Power Producer | 28 | 3.4 TWh | May 2026 | - | ||
| Ormat Salt Wells LLC | Reno, NV | Independent Power Producer | 1 | 71.9 GWh | Dec 2025 | - | ||
| ORNI 30 LLC | Reno, NV | Independent Power Producer | 1 | 38.8 GWh | May 2026 | - | ||
| Orsted Onshore North America | Austin, TX | Independent Power Producer | 1 | 1.2 TWh | May 2026 | - | ||
| Orsted Wind Power North America LLC | Boston, MA | Independent Power Producer | 3 | 554.1 GWh | May 2026 | - | ||
| OSLH, LLC | Portland, OR | Independent Power Producer | - | 22.8 GWh | Dec 2024 | - | ||
| 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 | - | ||
| Ottawa Wind 24, LLC | Findlay, OH | Industrial | 1 | 2.3 GWh | Dec 2024 | - | ||
| Otter Creek Ethanol LLC - Poet Ashton | Ashton, IA | Industrial | 1 | 48.8 GWh | May 2026 | - | ||
| Otter River Road Solar LLC | Framingham, MA | Independent Power Producer | 1 | 4.0 GWh | Dec 2025 | - | ||
| Outback Solar, LLC | New York, NY | Independent Power Producer | 1 | 9.0 GWh | Dec 2025 | - | ||
| Overlook Solar Partners, LLC | New York, NY | Independent Power Producer | 1 | 8.5 GWh | Dec 2025 | - | ||
| Overman Solar, LLC | Asheville, NC | Independent Power Producer | - | 11.2 GWh | Dec 2024 | - | ||
| OWEN Solar LLC | Menlo Park, CA | Independent Power Producer | 1 | 7.4 GWh | Dec 2025 | - | ||
| Owlville Creek Solar 2, LLC | Boston, MA | Independent Power Producer | 1 | 8.0 GWh | Dec 2024 | - | ||
| Owlville Creek Solar, LLC | Boston, MA | Independent Power Producer | 1 | 8.6 GWh | Dec 2025 | - | ||
| OXON Run Community Renewable Energy Facility | Washington, DC | State-Owned Utility | 1 | 1.1 GWh | Dec 2025 | - | ||
| Oxy Renewable Energy LLC | Houston, TX | Industrial | 1 | 41.3 GWh | Dec 2025 | - | ||
| Oxy VInyls LP | Houston, TX | Industrial | 2 | 1.8 TWh | May 2026 | - | ||
| OYA 2643 Moore Road LLC | Juno Beach, FL | Independent Power Producer | 1 | 6.1 GWh | Dec 2025 | - | ||
| OYA Blanchard Road 2 LLC | Juno Beach, FL | Independent Power Producer | 1 | 7.7 GWh | Dec 2025 | - | ||
| OYA Blanchard Road LLC | Juno Beach, FL | Independent Power Producer | 1 | 7.2 GWh | Dec 2025 | - | ||
| OYA Church Road A LLC | Toronto, ON | Independent Power Producer | 1 | 8.9 GWh | Dec 2025 | - | ||
| OYA Great Lakes Seaway LLC | Juno Beach, FL | Independent Power Producer | 1 | 5.4 GWh | Dec 2025 | - | ||
| OYA Main Street LLC | Toronto, ON | Independent Power Producer | 1 | 6.9 GWh | Dec 2025 | - | ||
| OYA NYS RTE 12 LLC | Juno Beach, FL | Independent Power Producer | 1 | 7.0 GWh | Dec 2025 | - | ||
| Ozark Hydro Management, LLC | Locust Grove, AR | Independent Power Producer | 3 | 52.9 GWh | May 2026 | - | ||
| Ozarks Electric Coop Corp - (Ar) | Fayetteville, AR | Cooperative | 1 | 2.2 GWh | Dec 2025 | - | ||
| Osceola Windpower LLC | Juno Beach, FL | Independent Power Producer | 2 | 619.3 GWh | May 2026 | Jun 2019 | ||
| Ormat Stillwater Solar PV II, LLC | Reno, NV | Independent Power Producer | 1 | 4.1 GWh | Jun 2025 | Jun 2025 | $188.84k | |
| Oak Leaf Solar 100 LLC | Montpelier, VT | - | - | - | Sep 2025 | $56.81k | ||
| Oak Leaf Solar 56 LLC | Montpelier, VT | - | - | - | Sep 2025 | $285.61k | ||
| Oak Leaf Solar Xviii LLC | Montpelier, VT | - | - | - | Sep 2025 | $183.81k | ||
| Oak Leaf Solar Xxii LLC | Montpelier, VT | - | - | - | Sep 2025 | $71.61k | ||
| Oak Leaf Solar XXVI LLC | Montpelier, VT | - | - | - | Sep 2025 | $62.72k | ||
| Oak Ridge Solar, LLC | Louisville, CO | - | - | - | Sep 2025 | $4.75M | ||
| Occidental Chemical Corporation | Houston, TX | Industrial | 2 | 6.1 TWh | May 2026 | Sep 2025 | $36.49M | |
| Ocean State BTM, LLC | Wakefield, MA | - | - | - | Sep 2025 | $26.95k |
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 | May 2026 | Nuclear |
| Barry | Bucks, Alabama | 12 TWh | Jan 1954 | May 2026 | Natural Gas : 97.1% Bituminous Coal : 2.9% |
| Beaver Valley | Shippingport, Pennsylvania | 15 TWh | Aug 1976 | May 2026 | Nuclear |
| Bowen | Cartersville, Georgia | 13 TWh | Sep 1971 | May 2026 | Bituminous Coal : 99.8% |
| Braidwood Generation Station | Braceville, Illinois | 20 TWh | Jun 1988 | May 2026 | Nuclear |
| Browns Ferry | Decatur, Alabama | 31 TWh | Jul 1974 | May 2026 | Nuclear |
| Brunswick Nuclear | Southport, North Carolina | 15 TWh | Oct 1975 | May 2026 | Nuclear |
| Byron Generating Station | Byron, Illinois | 20 TWh | Aug 1985 | May 2026 | Nuclear |
| Calvert Cliffs Nuclear Power Plant | Lusby, Maryland | 15 TWh | Apr 1975 | May 2026 | Nuclear |
| Catawba | York, South Carolina | 18 TWh | May 1985 | May 2026 | Nuclear |
| Comanche Peak | Glen Rose, Texas | 20 TWh | Jul 1990 | May 2026 | Nuclear |
| Crystal River | Crystal River, Florida | 16 TWh | Sep 1966 | May 2026 | Natural Gas : 68.9% Bituminous Coal : 30.9% |
| Diablo Canyon | Avila Beach, California | 18 TWh | Apr 1985 | May 2026 | Nuclear |
| Donald C Cook | Bridgman, Michigan | 19 TWh | Jul 1975 | May 2026 | Nuclear |
| Dresden Generating Station | Morris, Illinois | 15 TWh | Jul 1970 | May 2026 | Nuclear |
| Edwin I Hatch | Baxley, Georgia | 14 TWh | Nov 1975 | May 2026 | Nuclear |
| Gavin Power, LLC | Cheshire, Ohio | 13 TWh | Sep 1974 | May 2026 | Bituminous Coal : 99.6% |
| Grand Coulee | Grand Coulee, Washington | 18 TWh | Feb 1941 | May 2026 | Water |
| Guernsey Power Station | Byesville, Ohio | 12 TWh | Jan 2023 | May 2026 | Natural Gas |
| H Allen Franklin Combined Cycle | Smiths, Alabama | 12 TWh | May 2002 | May 2026 | Natural Gas |
| Jack McDonough | Smyrna, Georgia | 18 TWh | Apr 1971 | May 2026 | Natural Gas |
| James H Miller Jr | Quinton, Alabama | 19 TWh | Sep 1978 | May 2026 | Subbituminous Coal : 99.0% Natural Gas : 1.0% |
| Joseph M Farley | Columbia, Alabama | 15 TWh | Nov 1977 | May 2026 | Nuclear |
| Labadie | Labadie, Missouri | 15 TWh | May 1970 | May 2026 | Subbituminous Coal : 99.9% |
| LaSalle Generating Station | Marseilles, Illinois | 18 TWh | Dec 1983 | May 2026 | Nuclear |
| Limerick | Sanatoga, Pennsylvania | 19 TWh | Jan 1986 | May 2026 | Nuclear |
| McGuire | Huntersville, North Carolina | 19 TWh | Aug 1981 | May 2026 | Nuclear |
| Millstone | Waterford, Connecticut | 17 TWh | Nov 1975 | May 2026 | Nuclear |
| Monroe (MI) | Monroe, Michigan | 16 TWh | Oct 1969 | May 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 | May 2026 | Nuclear |
| North Anna | Mineral, Virginia | 16 TWh | May 1978 | May 2026 | Nuclear |
| Oak Grove (TX) | Franklin, Texas | 12 TWh | Mar 2010 | May 2026 | Lignite Coal : 99.1% Natural Gas : 0.9% |
| Oconee | Seneca, South Carolina | 22 TWh | Jun 1973 | May 2026 | Nuclear |
| Palo Verde | Wintersburg, Arizona | 31 TWh | Dec 1985 | May 2026 | Nuclear |
| Peach Bottom | Delta, Pennsylvania | 22 TWh | Jun 1974 | May 2026 | Nuclear |
| Prairie State Generating Station | Marissa, Illinois | 12 TWh | May 2012 | May 2026 | Bituminous Coal : 99.8% |
| PSEG Salem Generating Station | Hancocks Bridge, New Jersey | 19 TWh | May 1971 | May 2026 | Nuclear |
| Quad Cities Generating Station | Cordova, Illinois | 15 TWh | Nov 1972 | May 2026 | Nuclear |
| Robert Moses Niagara | Lewiston, New York | 14 TWh | Dec 1960 | May 2026 | Water |
| Sequoyah | Soddy Daisy, Tennessee | 17 TWh | Jun 1981 | May 2026 | Nuclear |
| South Texas Project | Wadsworth, Texas | 21 TWh | Jul 1988 | May 2026 | Nuclear |
| St Lucie | Jensen Beach, Florida | 15 TWh | Apr 1976 | May 2026 | Nuclear |
| Surry | Surry, Virginia | 12 TWh | Nov 1972 | May 2026 | Nuclear |
| TalenEnergy Susquehanna | Berwick, Pennsylvania | 19 TWh | May 1983 | May 2026 | Nuclear |
| Turkey Point | Homestead, Florida | 20 TWh | Mar 1967 | May 2026 | Nuclear : 64.2% Natural Gas : 35.8% |
| Union Power Station | El Dorado, Arkansas | 12 TWh | Dec 2002 | May 2026 | Natural Gas |
| Vogtle | Waynesboro, Georgia | 37 TWh | Apr 1987 | May 2026 | Nuclear |
| W A Parish | Thompsons, Texas | 14 TWh | May 1958 | May 2026 | Subbituminous Coal : 81.6% Natural Gas : 18.4% |
| Watts Bar Nuclear Plant | Spring City, Tennessee | 20 TWh | Apr 1996 | May 2026 | Nuclear |
| West County Energy Center | Loxahatchee, Florida | 18 TWh | Jul 2009 | May 2026 | Natural Gas |