| GDF Suez Energy Marketing N.A., Inc. GPSPS | Engie | utility service violation | 2017 | TX-PUC | $1,115,000 |
| Duke Energy Beckjord LLC | Duke Energy | water pollution violation | 2016 | EPA | $1,100,000 |
| Mirant | NRG Energy | environmental violation | 2009 | CA-SFCA | $1,100,000 |
| Northern Indiana Public Service Co - Gas | NiSource | utility safety violation | 2020 | IN-URC | $1,100,000 |
| UGI Utilities, Inc. | UGI Corp. | utility safety violation | 2020 | PA-PUC | $1,100,000 |
| Luminant Generation Company, LLC | Vistra Energy | utility service violation | 2018 | TX-PUC | $1,100,000 |
| INTERSTATE POWER & LIGHT | Alliant Energy | environmental violation | 2015 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $1,100,000 |
| Pacific Gas and Electric Company | PG&E Corp. | utility safety violation | 2023 | CA-PUC | $1,074,000 |
| South Jersey Gas Co. and South Jersey Resources Group, LLC | South Jersey Industries | energy market violation | 2010 | FERC | $1,070,551 |
| Pacific Gas & Electric Co. (PG&E) | PG&E Corp. | consumer protection violation | 2014 | CA-PUC | $1,050,000 |
| Consumers Energy | CMS Energy | employment discrimination | 2011 | private lawsuit-federal | $1,023,385 |
| Aquila Merchant Services Inc. | Evergy Inc. | price-fixing or anti-competitive practices | 2007 | private lawsuit-federal | $1,013,846 |
| Duke Energy Renewables Inc. | Duke Energy | environmental violation | 2013 | FWS | $1,000,000 |
| Broadwind Energy | Broadwind Inc. | accounting fraud or deficiencies | 2015 | SEC | $1,000,000 |
| Northwestern Corporation | NorthWestern Corp. | energy market violation | 2007 | FERC | $1,000,000 |
| Consumers Energy | CMS Energy | consumer protection violation | 2013 | MI-AG | $1,000,000 |
| Duke Energy | Duke Energy | air pollution violation | 2009 | MULTI-AG | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $1,000,000 |
| GenOn Power Generation, LLC | NRG Energy | air pollution violation | 2013 | MULTI-AG | $1,000,000 |
| Mirant Corporation | NRG Energy | environmental violation | 2007 | NY-AG | $1,000,000 |
| National Grid | National Grid | consumer protection violation | 2011 | MA-AG | $1,000,000 |
| NRG Chalk Point LLC | NRG Energy | environmental violation | 2016 | MD-AG | $1,000,000 |
| Xcel Energy | Xcel Energy | consumer protection violation | 2003 | MN-AG | $1,000,000 |
| Northern Indiana Public Service Corporation | NiSource | employment discrimination | 2019 | OFCCP | $1,000,000 |
| California Water Service Company | California Water Service Group | water pollution violation | 2016 | CA-WAT | $1,000,000 |
| Constellation Power Source Generation, Inc. and BBSS, Inc. | Constellation Energy Corporation | water pollution violation | 2007 | MD-ENV | $1,000,000 |
| Talen Energy | Talen Energy Corporation | environmental violation | 2019 | PA-ENV | $1,000,000 |
| Southern California Edison Co. (SCE) | Edison International | utility safety violation | 2020 | CA-PUC | $1,000,000 |
| Peoples Gas | WEC Energy Group | utility safety violation | 2015 | IL-ICC | $1,000,000 |
| Peoples Gas | WEC Energy Group | utility safety violation | 2006 | IL-ICC | $1,000,000 |
| Boston Gas Company and Colonial Gas Company d/b/a National Grid | National Grid | utility safety violation | 2020 | MA-DPU | $1,000,000 |
| Boston Gas Company and Colonial Gas Company d/b/a National Grid | National Grid | utility safety violation | 2020 | MA-DPU | $1,000,000 |
| Potomac Electric Power Company | Exelon | utility service violation | 2011 | MD-PSC | $1,000,000 |
| Dominion Energy Ohio | Dominion Energy | utility safety violation | 2020 | OH-PUC | $1,000,000 |
| Metropolitan Edison Company | FirstEnergy | utility safety violation | 2021 | PA-PUC | $1,000,000 |
| UGI Utilities, Inc. | UGI Corp. | utility safety violation | 2013 | PA-PUC | $1,000,000 |
| Southern California Edison | Edison International | utility safety violation | 2022 | CA-PUC | $1,000,000 |
| Integrys Energy Services, Inc. | Exelon | energy market violation | 2008 | FERC | $994,506 |
| Virginia Electric and Power Co. | Dominion Energy | environmental violation | 2020 | VA-ENV | $990,000 |
| Columbia Gas of Pennsylvania, Inc. | NiSource | utility safety violation | 2023 | PA-PUC | $990,000 |
| Entergy Services, Inc. | Entergy | energy market violation | 2013 | FERC | $975,000 |
| DTE | DTE Energy | consumer protection violation | 2005 | MI-PSC | $975,000 |
| DUKE ENERGY CORP. | Duke Energy | environmental violation | 2015 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $975,000 |
| Talen Generation, LLC | Talen Energy Corporation | environmental violation | 2016 | PA-ENV | $952,150 |
| Exelon Generation Company | Exelon | wage and hour violation | 2015 | private lawsuit-federal | $950,000 |
| PEPCO | Exelon | environmental violation | 2002 | MD-ENV | $950,000 |
| HOOSIER ENERGY REC. - MEROM GENERAT | Hoosier Energy | environmental violation | 2010 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $950,000 |
| DAIRYLAND POWER COOP | Dairyland Power Cooperative | environmental violation | 2014 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $950,000 |
| FPL Energy Maine Operating Services, Inc. | NextEra Energy | labor relations violation | 2005 | NLRB | $945,000 |
| Indianapolis Power & Light Company | AES Corp. | air pollution violation | 2020 | EPA | $925,000 |
| Public Service Company of Colorado | Xcel Energy | environmental violation | 2022 | EPA | $925,000 |
| San Diego Gas & Electric (SDG&E) | Sempra Energy | consumer protection violation | 2009 | CA-PUC | $920,000 |
| Southern California Edison | Edison International | environmental violation | 2020 | USAO | $900,000 |
| Pacific Gas & Electric Co. (PG&E) | PG&E Corp. | utility safety violation | 2020 | CA-PUC | $900,000 |
| PECO ENERGY COMPANY | Exelon | utility safety violation | 2016 | PA-PUC | $900,000 |
| Reliant Energy Retail Services, LLC | NRG Energy | consumer protection violation | 2016 | TX-PUC | $900,000 |
| Indiana Gas Company, Inc. - Vectren | CenterPoint Energy | utility safety violation | 2021 | IN-URC | $894,000 |
| Potomac Electric Power Company (Pepco) | Exelon | environmental violation | 2014 | DC-AG | $850,000 |
| MINNKOTA POWER COOPERATIVE | Minnkota Power Cooperative | environmental violation | 2006 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $850,000 |
| DTE Energy Company | DTE Energy | consumer protection violation | 2018 | MI-PSC | $840,000 |
| Pacific Gas and Electric Company | PG&E Corp. | utility safety violation | 2024 | CA-PUC | $800,500 |
| Puget Sound Energy | Puget Sound Energy | energy market violation | 2009 | FERC | $800,000 |
| AmeriGas Propane, L.P. | UGI Corp. | consumer protection violation | 2013 | CA-MULTI | $800,000 |
| Southwestern Public Service Company | Xcel Energy | environmental violation | 2011 | NM-ENV | $800,000 |
| Columbia Gas Of Virginia, Inc. | NiSource | utility safety violation | 2010 | VA-SCC | $800,000 |
| Northern Indiana Public Service Co - Gas | NiSource | utility safety violation | 2019 | IN-URC | $765,000 |
| NorthWestern Corp. | NorthWestern Corp. | consumer protection violation | 2010 | MT-PSC | $765,000 |
| RRI Energy | NRG Energy | energy market violation | 2010 | FERC | $750,000 |
| Louisville Gas & Electric Company | PPL Corp. | environmental violation | 2021 | EPA | $750,000 |
| National Grid | National Grid | utility service violation | 2019 | MA-DPU | $750,000 |
| Washington Gas Light Company | AltaGas | utility safety violation | 2020 | MD-PSC | $750,000 |
| UGI UTILITIES, INC (Gas Division) | UGI Corp. | consumer protection violation | 2004 | PA-PUC | $750,000 |
| Luminant Energy Company LLC | Vistra Energy | utility service violation | 2013 | TX-PUC | $750,000 |
| Public Service Company of New Mexico and PNMR Services Co. | PNM Resources | employment discrimination | 2023 | EEOC | $750,000 |
| Raizen Energia SA and Raizen Trading SA | Raizen | investor protection violation | 2024 | CFTC | $750,000 |
| AMERICAN ELECTRIC POWER | American Electric Power | environmental violation | 2007 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $750,000 |
| EAST KENTUCKY POWER COOPERATIVE | East Kentucky Power Cooperative | environmental violation | 2007 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $750,000 |
| Northern Indiana Public Service Company, LLC | NiSource | utility safety violation | 2024 | IN-URC | $707,850 |
| Dominion Retail, Inc. | Dominion Energy | consumer protection violation | 2006 | CT-AG | $707,182 |
| Florida Power and Light | NextEra Energy | wage and hour violation | 2012 | private lawsuit-federal | $700,000 |
| Rochester Gas and Electric | Iberdrola | environmental violation | 2008 | NY-AG | $700,000 |
| Boston Gas Company d/b/a National Grid | National Grid | utility safety violation | 2020 | MA-DPU | $700,000 |
| Oncor Electric Delivery Company LLC | Sempra Energy | consumer protection violation | 2016 | TX-PUC | $700,000 |
| CMS Energy Resources Management | CMS Energy | price-fixing or anti-competitive practices | 2007 | private lawsuit-federal | $700,000 |
| Thomas & Betts | ABB Ltd. | employment discrimination | 2003 | private lawsuit-federal | $698,610 |
| CINERGY AND PSI ENERGY, INC., WABASH RIVER | Duke Energy | environmental violation | 2009 | EPA | $687,500 |
| Southern California Edison Co. (SCE) | Edison International | utility service violation | 2004 | CA-PUC | $656,000 |
| GAMESA WIND PA LLC | Siemens Energy | environmental violation | 2007 | PA-ENV | $654,946 |
| Entergy Nuclear Operations, Inc. | Entergy | nuclear safety violation | 2008 | NRC | $650,000 |
| Southern California Edison Company | Edison International | price-fixing or anti-competitive practices | 2014 | FERC | $650,000 |
| NextEra Energy | NextEra Energy | wage and hour violation | 2012 | private lawsuit-federal | $650,000 |
| JUST ENERGYTEXAS L.P. | Just Energy Group | consumer protection violation | 2019 | TX-PUC | $650,000 |
| Constellation Energy Commodities Group, Inc | Constellation Energy Corporation | energy market violation | 2013 | FERC | $645,928 |
| DUKE ZIMMER DYNEGY | Vistra Energy | environmental violation | 2020 | EPA | $645,000 |
| FirstEnergy Corp. | FirstEnergy | wage and hour violation | 2014 | WHD | $634,742 |
| SHENANGO LLC | DTE Energy | environmental violation | 2012 | PA-ENV | $625,000 |
| Thomas & Betts Corp. | ABB Ltd. | environmental violation | 2016 | CA-DTSC | $625,000 |
| PECO Energy Company | Exelon | utility service violation | 2022 | PA-PUC | $620,591 |
| Indiana Gas Company, Inc. | CenterPoint Energy | utility safety violation | 2023 | IN-URC | $612,750 |
| West Penn Power | FirstEnergy | environmental violation | 2022 | EPA | $610,000 |
| WEST PENN POWER COMPANY | FirstEnergy | environmental violation | 2022 | EPA | (*)Penalty amounts marked by an asterisk are ones announced by more than one agency. Parent penalty totals are adjusted to avoid double-counting. $610,000 |
| EXELON GENERATION CO LLC | Exelon | environmental violation | 2004 | PA-ENV | $602,250 |
