| East Kentucky Power Cooperative, Inc | East Kentucky Power Cooperative | utility safety violation | 2008 | KY-PSC | $5,000 |
| EAST KENTUCKY POWER COOPERATIVE INC | East Kentucky Power Cooperative | workplace safety or health violation | 2000 | OSHA | $9,375 |
| East Kentucky Power Cooperative | East Kentucky Power Cooperative | air pollution violation | 2007 | EPA | $11,400,000 |
| East Kentucky Power Cooperative | East Kentucky Power Cooperative | air pollution violation | 2007 | EPA | $650,750,000 |
| EAST KENTUCKY POWER COOPERATIVE | East Kentucky Power Cooperative | air pollution violation | 2012 | KY-ENV | $41,000 |
| EAST KENTUCKY POWER COOPERATIVE | East Kentucky Power Cooperative | air pollution violation | 2011 | KY-ENV | $75,000 |
| EAST KENTUCKY POWER COOPERATIVE | East Kentucky Power Cooperative | air pollution violation | 2005 | KY-ENV | $100,000 |
| 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 |
| EAST KENTUCKY POWER COOPERATIVE | East Kentucky Power Cooperative | environmental violation | 2013 | EPA | $30,684,571 |
| e prime, Inc. | Xcel Energy | price-fixing or anti-competitive practices | 2004 | CFTC | $16,000,000 |
| e Prime Inc. | Xcel Energy | price-fixing or anti-competitive practices | 2009 | private lawsuit-federal | $500,000 |
| e Prime Inc. | Xcel Energy | price-fixing or anti-competitive practices | 2019 | private lawsuit-federal | $2,750,000 |
| E E S COKE BATTERY LLC | DTE Energy | workplace safety or health violation | 2009 | OSHA | $16,800 |
| Dynegy, Inc. | Vistra Energy | benefit plan administrator violation | 2007 | private lawsuit-federal | $9,975,000 |
| Dynegy, Inc. | Vistra Energy | benefit plan administrator violation | 2008 | private lawsuit-federal | $17,900,000 |
| DYNEGY ZIMMER LLC | Vistra Energy | workplace safety or health violation | 2019 | OSHA | $13,260 |
| Dynegy Petroleum Corp. | Vistra Energy | railroad safety violation | 2008 | FRA | $5,500 |
| Dynegy Petroleum Corp. | Vistra Energy | railroad safety violation | 2008 | FRA | $8,250 |
| Dynegy Moss Landing, LLC | Vistra Energy | Family and Medical Leave Act | 2014 | WHD | $56,868 |
| DYNEGY MIDWEST OPERATION WOOD RIVER PLANT | Vistra Energy | workplace safety or health violation | 2002 | OSHA | $10,000 |
| Dynegy Midwest Generation, LLC | Vistra Energy | environmental violation | 2023 | IL-ENV | $80,000 |
| DYNEGY MIDWEST GENERATION LLC. | Vistra Energy | workplace safety or health violation | 2015 | OSHA | $23,000 |
| Dynegy Midwest Generation LLC | Vistra Energy | environmental violation | 2023 | IL-AG | $500,000 |
| Dynegy Midwest Generation | Vistra Energy | air pollution violation | 2005 | EPA | $524,000,000 |
| Dynegy Marketing & Trade, LLC | Vistra Energy | energy market violation | 2022 | FERC | $469,425 |
| Dynegy Marketing & Trade (Dynegy) and West Coast Power LLC | Vistra Energy | price-fixing or anti-competitive practices | 2002 | CFTC | $5,000,000 |
| Dynegy Inc. | Vistra Energy | accounting fraud or deficiencies | 2002 | SEC | $3,000,000 |
| Dynegy Inc. | Vistra Energy | price-fixing or anti-competitive practices | 2007 | private lawsuit-federal | $2,400,000 |
| Dynegy Inc. | Vistra Energy | price-fixing or anti-competitive practices | 2019 | private lawsuit-federal | $4,500,000 |
| DYNEGY ILLINOIS, INC. | Vistra Energy | workplace safety or health violation | 2018 | OSHA | $14,872 |
| Dynegy | Vistra Energy | price-fixing or anti-competitive practices | 2004 | CA-AG | $281,500,000 |
| DUKE ZIMMER DYNEGY | Vistra Energy | environmental violation | 2020 | EPA | $645,000 |
| Duke Power and its subsidiary Duke Engineering & Services; Oswega Tower & Fence Co. | Duke Energy | labor relations violation | 2000 | NLRB | $11,000 |
| Duke Energy Trading and Marketing, L.L.C. | Duke Energy | price-fixing or anti-competitive practices | 2003 | CFTC | $28,000,000 |
| Duke Energy Trading and Marketing L.L.C. | Duke Energy | price-fixing or anti-competitive practices | 2017 | private lawsuit-federal | $9,400,000 |
| Duke Energy Trading and Marketing L.L.C. | Duke Energy | price-fixing or anti-competitive practices | 2009 | private lawsuit-federal | $3,466,667 |
| Duke Energy Retirement Cash Balance Plan | Duke Energy | benefit plan administrator violation | 2011 | private lawsuit-federal | $30,000,000 |
| Duke Energy Renewables Inc. | Duke Energy | environmental violation | 2013 | FWS | $1,000,000 |
| Duke Energy Progress, LLC | Duke Energy | air pollution violation | 2002 | NC-ENV | $73,615 |
| Duke Energy Progress | Duke Energy | environmental violation | 2015 | NC-ENV | $25,116,883 |
| DUKE ENERGY OHIO, INC. | Duke Energy | workplace safety or health violation | 2008 | OSHA | $7,500 |
| DUKE ENERGY OHIO, INC. | Duke Energy | workplace safety or health violation | 2014 | OSHA | $10,000 |
| Duke Energy Ohio Inc | Duke Energy | utility safety violation | 2012 | OH-PUC | $500,000 |
| Duke Energy Ohio Inc | Duke Energy | utility safety violation | 2008 | OH-PUC | $30,000 |
| DUKE ENERGY LLC NOBLESVILLE GEN STATION | Duke Energy | solid waste violation | 2018 | IN-ENV | $17,500 |
| DUKE ENERGY KENTUCKY - LIQUID | Duke Energy | pipeline safety violation | 2019 | PHMSA | $55,700 |
| DUKE ENERGY INDIANA, LLC - GALLAGHER GENERATING STATION | Duke 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. $1,750,000 |
| Duke Energy Indiana, LLC | Duke Energy | environmental violation | 2023 | IN-ENV | $12,187 |
| DUKE ENERGY INDIANA INC - R GALLAGHER GENERATING STATION | Duke Energy | air pollution violation | 2017 | IN-ENV | $6,250 |
| DUKE ENERGY INDIANA - EDWARDSPORT GENERATING STATION | Duke Energy | air pollution violation | 2019 | IN-ENV | $9,000 |
| DUKE ENERGY INDIANA - EDWARDSPORT GENERATING STATION | Duke Energy | air pollution violation | 2014 | IN-ENV | $18,000 |
| DUKE ENERGY INDIANA - EDWARDSPORT GENERATING STATION | Duke Energy | air pollution violation | 2003 | IN-ENV | $5,000 |
| DUKE ENERGY INDIANA | Duke Energy | solid waste violation | 2018 | IN-ENV | $17,500 |
| DUKE ENERGY IN GIBSON GENERATING STATION | Duke Energy | environmental violation | 2015 | IN-ENV | $11,250 |
| DUKE ENERGY IN GIBSON GENERATING STATION | Duke Energy | air pollution violation | 2003 | IN-ENV | $7,000 |
| Duke Energy Hot Spring, LLC | Duke Energy | air pollution violation | 2003 | AR-ENV | $15,000 |
| DUKE ENERGY GENERATION SERVICES HOLDING CO, INC | Duke Energy | workplace safety or health violation | 2010 | OSHA | $5,250 |
| DUKE ENERGY FLORIDA, LLC | Duke Energy | workplace safety or health violation | 2023 | OSHA | $9,488 |
| DUKE ENERGY FLORIDA, LLC | Duke Energy | workplace safety or health violation | 2023 | OSHA | $10,547 |
| DUKE ENERGY FLORIDA, LLC | Duke Energy | environmental violation | 2024 | EPA | $16,350 |
| DUKE ENERGY FLORIDA, INC. | Duke Energy | workplace safety or health violation | 2014 | OSHA | $35,000 |
| DUKE ENERGY FLORIDA LLC D/B/A DUKE ENERGY | Duke Energy | pipeline safety violation | 2003 | PHMSA | $5,000 |
| DUKE ENERGY CORPORATION (FORMERLY PSI ENERGY - GIB | Duke Energy | environmental violation | 2014 | EPA | $199,000 |
| Duke Energy Corporation | Duke Energy | water pollution violation | 2015 | EPA | $102,000,000 |
| Duke Energy Corporation | Duke Energy | investor protection violation | 2017 | DOJ_ANTITRUST | $600,000 |
| Duke Energy Corporation | Duke Energy | energy market violation | 2018 | FERC | $3,500,000 |
| DUKE ENERGY CORPORATION | Duke Energy | air pollution violation | 2003 | SC-ENV | $6,000 |
| DUKE ENERGY CORPORATION | Duke Energy | environmental violation | 2015 | EPA | $5,785 |
| 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 |
| Duke Energy Carolinas, LLC | Duke Energy | energy market violation | 2011 | FERC | $425,000 |
| Duke Energy Carolinas, LLC | Duke Energy | air pollution violation | 2014 | NC-ENV | $10,470 |
| Duke Energy Carolinas, LLC | Duke Energy | air pollution violation | 2013 | NC-ENV | $5,303 |
| Duke Energy Carolinas, LLC | Duke Energy | air pollution violation | 2009 | NC-ENV | $6,629 |
| Duke Energy Carolinas, LLC | Duke Energy | air pollution violation | 2008 | NC-ENV | $6,218 |
| Duke Energy Carolinas, LLC | Duke Energy | environmental violation | 2016 | NC-ENV | $6,831,005 |
| Duke Energy Carolinas, LLC | Duke Energy | air pollution violation | 2024 | NC-ENV | $8,507 |
| DUKE ENERGY CAROLINAS, LLC | Duke Energy | workplace safety or health violation | 2009 | OSHA | $5,600 |
| DUKE ENERGY CAROLINAS, LLC | Duke Energy | workplace safety or health violation | 2015 | OSHA | $5,000 |
| DUKE ENERGY CAROLINAS, LLC | Duke Energy | workplace safety or health violation | 2019 | OSHA | $5,000 |
| DUKE ENERGY CAROLINAS, LLC | Duke Energy | workplace safety or health violation | 2020 | OSHA | $21,000 |
| DUKE ENERGY CAROLINAS, LLC | Duke Energy | workplace safety or health violation | 2020 | OSHA | $35,000 |
| DUKE ENERGY CAROLINAS, LLC | Duke Energy | environmental violation | 2009 | EPA | $6,240 |
| Duke Energy Carolinas LLC | Duke Energy | environmental violation | 2016 | USAO | $1,700,000 |
| DUKE ENERGY CAROLINAS LLC | Duke Energy | water pollution violation | 2007 | SC-ENV | $7,268 |
| DUKE ENERGY CAROLINAS LLC | Duke Energy | environmental violation | 2011 | EPA | $12,630 |
| Duke Energy Beckjord LLC | Duke Energy | water pollution violation | 2016 | EPA | $1,100,000 |
| DUKE ENERGY - LP WINNIE NO 1 CS | Duke Energy | environmental violation | 2001 | TX-ENV | $9,352 |
| DUKE ENERGY - CAYUGA | Duke Energy | environmental violation | 2018 | IN-ENV | $13,500 |
| Duke Energy (Plainfield) | Duke Energy | environmental violation | 2009 | EPA | $54,402 |
| Duke Energy | Duke Energy | air pollution violation | 2015 | EPA | $5,375,000 |
| Duke Energy | Duke Energy | environmental violation | 2014 | EPA | $3,000,000 |
| Duke Energy | Duke Energy | price-fixing or anti-competitive practices | 2003 | FERC | $2,500,000 |
| Duke Energy | Duke Energy | air pollution violation | 2009 | EPA | $93,000,000 |
| Duke Energy | Duke Energy | nuclear safety violation | 2004 | NRC | $60,000 |
| Duke Energy | Duke Energy | price-fixing or anti-competitive practices | 2004 | MULTI-AG | $207,500,000 |
| 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 |
| Duke Energy | Duke Energy | air pollution violation | 2001 | CO-DPHE | $97,105 |
| DUKE ENERGY | Duke Energy | air pollution violation | 2012 | IN-ENV | $42,000 |
| DUKE ENERGY | Duke Energy | water pollution violation | 2008 | IN-ENV | $25,455 |
| DUKE ENERGY | Duke Energy | water pollution violation | 2008 | IN-ENV | $9,500 |
| Duke Energy | Duke Energy | environmental violation | 2021 | NC-AG | $855,000,000 |
