| The Dayton Power and Light Co. | AES Corp. | environmental violation | 2014 | OH-ENV | $100,000 |
| Pacific Gas & Electric Co. (PG&E) | PG&E Corp. | utility safety violation | 2018 | CA-PUC | $100,000 |
| Pacific Gas & Electric Co. (PG&E) | PG&E Corp. | utility safety violation | 2015 | CA-PUC | $100,000 |
| Peoples Gas | WEC Energy Group | utility safety violation | 2013 | IL-ICC | $100,000 |
| Ameren-CILCO | Ameren | utility safety violation | 2013 | IL-ICC | $100,000 |
| Vectren North | CenterPoint Energy | utility safety violation | 2012 | IN-URC | $100,000 |
| Cincinnati Gas & Electric Company | Duke Energy | utility safety violation | 2003 | OH-PUC | $100,000 |
| Metropolitan Edison Company | FirstEnergy | consumer protection violation | 2010 | PA-PUC | $100,000 |
| Reliant Energy Retail Service, LLC | NRG Energy | consumer protection violation | 2020 | TX-PUC | $100,000 |
| Reliant Energy Retail Services, LLC | NRG Energy | consumer protection violation | 2018 | TX-PUC | $100,000 |
| EDF Energy Trading | EDF-Electricite de France | utility service violation | 2017 | TX-PUC | $100,000 |
| Constellation Energy Commodities Group, Inc. | Constellation Energy Corporation | utility service violation | 2012 | TX-PUC | $100,000 |
| TXU Electric Delivery Company | Vistra Energy | utility service violation | 2006 | TX-PUC | $100,000 |
| Pacific Gas and Electric Company | PG&E Corp. | utility safety violation | 2022 | CA-PUC | $100,000 |
| NRG Texas Power LLC | NRG Energy | utility service violation | 2022 | TX-PUC | $100,000 |
| ALGONQUIN POWER SYSTEMS INC | Algonquin Power & Utilities | environmental violation | 2006 | EPA | $100,000 |
| HAWAIIAN ELECTRIC COMPANY INC. | Hawaiian Electric Industries | environmental violation | 2000 | EPA | $100,000 |
| HAWAIIAN ELECTRIC COMPANY INC. | Hawaiian Electric Industries | environmental violation | 2000 | EPA | $100,000 |
| AEP Texas North Co. | American Electric Power | utility service violation | 2012 | TX-PUC | $99,500 |
| Pepco Holdings, Inc. | Exelon | employment screening violation | 2015 | private lawsuit-federal | $99,000 |
| Southern Indiana Gas and Electric Company | CenterPoint Energy | environmental violation | 2022 | IN-ENV | $99,000 |
| TPI COMPOSITES IOWA LLC | TPI Composites | workplace safety or health violation | 2017 | OSHA | $99,000 |
| Southwestern Electric Power Company | American Electric Power | environmental violation | 2008 | TX-ENV | $98,176 |
| Southern California Edison Co. | Edison International | consumer protection violation | 2022 | CA-PUC | $97,315 |
| PROGRESS ENERGY | Duke Energy | environmental violation | 2004 | EPA | $97,185 |
| Duke Energy | Duke Energy | environmental violation | 2001 | CO-DPHE | $97,105 |
| American Electric Power Service Corporation | American Electric Power | wage and hour violation | 2014 | WHD | $96,227 |
| Pacific Gas and Electric Company | PG&E Corp. | nuclear safety violation | 2005 | NRC | $96,000 |
| UGI UTILITIES, INC (Gas Division) | UGI Corp. | utility safety violation | 2014 | PA-PUC | $96,000 |
| SIEMENS POWER TRANSMISSION AND DISTRIBUTION, INC. | Siemens Energy | environmental violation | 2009 | EPA | $95,636 |
| EES Coke Battery L.L.C. | DTE Energy | environmental violation | 2015 | MI-ENV | $95,000 |
| Atmos Energy Corp. | Atmos Energy | environmental violation | 2014 | TX-RRC | $95,000 |
| Southern California Edison | Edison International | environmental violation | 2000 | CA-SCAQMD | $95,000 |
| Detroit Edison | DTE Energy | utility administrative violation | 2005 | MI-PSC | $95,000 |
| Xcel Energy, Inc. | Xcel Energy | environmental violation | 2009 | EPA | $95,000 |
| Virginia Electric and Power Co. | Dominion Energy | environmental violation | 2015 | VA-ENV | $94,476 |
| EAST KENTUCKY POWER COOPERATIVE, INC. | East Kentucky Power Cooperative | environmental violation | 2009 | EPA | $93,936 |
| EDF Industrial Power Services | EDF-Electricite de France | utility administrative violation | 2021 | CA-PUC | $92,974 |
| New York State Electric and Gas Corporation | Iberdrola | environmental violation | 2022 | EPA | $92,740 |
| Georgia Power Company | Southern Company | environmental violation | 2000 | GA-ENV | $92,000 |
| Columbia Gas of Virginia, Inc | NiSource | utility safety violation | 2017 | VA-SCC | $92,000 |
| MIRANT MID-ATLANTIC | NRG Energy | environmental violation | 2010 | MD-ENV | $91,000 |
| Southern California Gas Company | Sempra Energy | labor relations violation | 2002 | NLRB | $90,645 |
| Ohio Power Co. | American Electric Power | environmental violation | 2004 | OH-ENV | $90,587 |
| Yankee Gas | EverSource Energy | labor relations violation | 2007 | NLRB | $90,000 |
| The Connecticut Light and Power Company | EverSource Energy | environmental violation | 2000 | CT-ENV | $90,000 |
| Just Energy | Just Energy Group | consumer protection violation | 2010 | IL-ICC | $90,000 |
| AEP Texas Central Company | American Electric Power | utility service violation | 2011 | TX-PUC | $90,000 |
| Puget Sound Energy | Puget Sound Energy | utility safety violation | 2005 | WA-UTC | $90,000 |
| Pacific Gas and Electric Co. et al. | PG&E Corp. | consumer protection violation | 2022 | CA-PUC | $89,880 |
| SOUTHCROSS ENERGY PARTNERS GP, LLC | Southcross Energy Partners | workplace safety or health violation | 2015 | OSHA | $89,600 |
| AEP Texas Central Company | American Electric Power | utility service violation | 2016 | TX-PUC | $89,000 |
| Carolina Power & Light Company | Duke Energy | nuclear safety violation | 2004 | NRC | $88,000 |
| Dominion Nuclear Connecticut, Inc. | Dominion Energy | nuclear safety violation | 2002 | NRC | $88,000 |
| Consolidated Edison Company of New York | Consolidated Edison | nuclear safety violation | 2000 | NRC | $88,000 |
| TAMPA ELECTRIC COMPANY | Emera | environmental violation | 2010 | FL-DEP | $88,000 |
| Columbia Gas of Virginia, Inc | NiSource | utility safety violation | 2008 | VA-SCC | $87,750 |
| Aqua Utilities, Inc. | Essential Utilities Inc. | environmental violation | 2011 | TX-ENV | $86,860 |
| West Penn Power Company | FirstEnergy | utility safety violation | 2014 | PA-PUC | $86,000 |
| Prairie State Generating Company LLC | Prairie State Generating | workplace safety or health violation | 2023 | MSHA | $85,580 |
| Prairie State Generating Company LLC | Prairie State Generating | workplace safety or health violation | 2023 | MSHA | $85,580 |
| NRG Power Marketing, LLC | NRG Energy | energy market violation | 2021 | FERC | $85,000 |
| AEP Texas Central Company | American Electric Power | utility service violation | 2018 | TX-PUC | $85,000 |
| Entergy Texas, Inc. | Entergy | utility service violation | 2009 | TX-PUC | $85,000 |
| Entergy | Entergy | utility administrative violation | 2005 | VT-PUC | $85,000 |
| AMERICAN ELECTRIC POWER COMPANY AND APPALACHIAN PO | American Electric Power | workplace safety or health violation | 2005 | OSHA | $85,000 |
| NSTAR | EverSource Energy | environmental violation | 2004 | EPA | $84,215 |
| AEP - Texas | American Electric Power | utility service violation | 2018 | TX-PUC | $84,000 |
| CenterPoint Energy Houston Electric, LLC | CenterPoint Energy | utility service violation | 2010 | TX-PUC | $84,000 |
| Peoples Gas | WEC Energy Group | utility safety violation | 2015 | IL-ICC | $83,200 |
| Connecticut Natural Gas Corporation | Iberdrola | environmental violation | 2000 | CT-ENV | $82,750 |
| Consolidated Edison Company of New York, Inc. | Consolidated Edison | environmental violation | 2017 | EPA | $82,275 |
| Columbia Gas of Virginia, Inc | NiSource | utility safety violation | 2007 | VA-SCC | $80,900 |
| Indiana Michigan Power Company, d.b.a. American Po | American Electric Power | environmental violation | 2005 | EPA | $80,769 |
| San Diego Gas & Electric Company | Sempra Energy | investor protection violation | 2010 | CFTC | $80,000 |
| Progress Energy Florida, Inc., | Duke Energy | energy market violation | 2013 | FERC | $80,000 |
| Wisconsin Public Service Corporation | WEC Energy Group | environmental violation | 2013 | WI-AG | $80,000 |
| AMERICAN WATER SERVICES, INC. | American Water Works | environmental violation | 2003 | FL-DEP | $80,000 |
| Xcel Energy - Key City/Wilmarth | Xcel Energy | environmental violation | 2004 | MN-ENV | $80,000 |
| Yankee Gas Services | EverSource Energy | utility safety violation | 2019 | CT-PURA | $80,000 |
| Peoples Natural Gas Co. | Essential Utilities Inc. | utility safety violation | 2011 | PA-PUC | $80,000 |
| UGI Utilities Inc. | UGI Corp. | utility safety violation | 2010 | PA-PUC | $80,000 |
| TXU Energy Retail Company, LLC | Vistra Energy | consumer protection violation | 2011 | TX-PUC | $80,000 |
| AEP Texas North Company | American Electric Power | utility service violation | 2010 | TX-PUC | $80,000 |
| Dynegy Midwest Generation, LLC | Vistra Energy | environmental violation | 2023 | IL-ENV | $80,000 |
| FirstEnergy Corp. | FirstEnergy | wage and hour violation | 2013 | WHD | $79,164 |
| SAN DIEGO GAS & ELECTRIC | Sempra Energy | workplace safety or health violation | 2008 | OSHA | $79,030 |
| Southern California Gas Co. | Sempra Energy | consumer protection violation | 2022 | CA-PUC | $78,652 |
| DAYTON POWER & LIGHT | AES Corp. | workplace safety or health violation | 2023 | OSHA | $78,125 |
| Liberty Utilities (EnergyNorth Natural Gas) Corp. d/b/a Liberty | Algonquin Power & Utilities | utility safety violation | 2019 | NH-PUC | $78,000 |
| Pacific Gas and Electric Company | PG&E Corp. | wage and hour violation | 2008 | WHD | $77,748 |
| Liberty Utilities (EnergyNorth Natural Gas) Corp. d/b/a Liberty | Algonquin Power & Utilities | utility safety violation | 2020 | NH-PUC | $77,500 |
| ENEL | Enel | environmental violation | 2018 | EPA | $76,997 |
| Toledo Edison Co. | FirstEnergy | environmental violation | 2016 | OH-ENV | $76,318 |
| AEP Texas North Company | American Electric Power | utility service violation | 2016 | TX-PUC | $76,000 |
| GenOn Chalk Point and Dickerson Generating Stations | NRG Energy | environmental violation | 2020 | MD-ENV | $75,500 |
| TENASKA GATEWAY PARTNERS, LTD. | Tenaska | environmental violation | 2022 | TX-ENV | $75,401 |
| NIPSCO | NiSource | labor relations violation | 2008 | NLRB | $75,000 |
| Southern California Edison | Edison International | environmental violation | 2014 | CA-ARB | $75,000 |
| EAST KENTUCKY POWER COOPERATIVE | East Kentucky Power Cooperative | environmental violation | 2011 | KY-ENV | $75,000 |
| AEP KENTUCKY POW ER / BIG SANDY PLANT | American Electric Power | environmental violation | 2010 | KY-ENV | $75,000 |
