| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2022 | UK-EA | £250,000 |
| Severn Trent Water Ltd | Severn Trent PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £246,897 |
| Severn Trent Water Ltd | Severn Trent PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £246,897 |
| Friendship Offshore BV | | | salvaging violation | 2018 | UK-MMO | £241,573 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2016 | UK-EA | £240,000 |
| Thames Water Utilities Ltd | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2019 | UK-DWI | £239,959 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2023 | UK-EA | £235,000 |
| United Utilities Water Limited | United Utilities Group PLC | utilities and power generation | water pollution violation | 2018 | UK-EA | £232,000 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2019 | UK-EA | £226,000 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2019 | UK-EA | £225,000 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2019 | UK-EA | £209,500 |
| MILLER HOMES LIMITED | Apollo Global Management | private equity (including portfolio companies) | water pollution violation | 2021 | UK-EA | £208,670 |
| United Utilities Water Limited | United Utilities Group PLC | utilities and power generation | water pollution violation | 2018 | UK-EA | £208,650 |
| Dwr Cymru Welsh Water | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | water pollution violation | 2021 | UK-NRW | £205,872 |
| THAMES WATER UTILITIES LIMITED | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2011 | UK-EA | £204,000 |
| Doonin Plant Limited | | | environmental violation | 2012 | UK-SEPA | £200,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2020 | UK-EA | £200,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2020 | UK-EA | £200,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2019 | UK-EA | £200,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2018 | UK-EA | £200,000 |
| Wessex Water Services Limited | YTL Power International | utilities and power generation | water pollution violation | 2018 | UK-EA | £200,000 |
| SOUTHERN WATER SERVICES LTD | Macquarie | financial services | water pollution violation | 2013 | UK-EA | £200,000 |
| UNITED UTILITIES WATER PLC | United Utilities Group PLC | utilities and power generation | water pollution violation | 2014 | UK-EA | £200,000 |
| UNITED UTILITIES WATER PLC | United Utilities Group PLC | utilities and power generation | water pollution violation | 2014 | UK-EA | £200,000 |
| South West Water Limited | Pennon Group PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £200,000 |
| Powerday PLC | | | hazardous waste violation | 2016 | UK-EA | £200,000 |
| Earthmover Tyre Recycling Limited | | | environmental violation | 2015 | UK-SEPA | £195,000 |
| GR & MM Blackledge PLC | | | environmental violation | 2014 | UK-EA | £191,106 |
| Bargain Booze Limited | | | environmental violation | 2014 | UK-EA | £188,109 |
| THAMES WATER UTILITIES LIMITED | Thames Water Utilities Ltd. | utilities and power generation | environmental violation | 2015 | UK-EA | £180,000 |
| South West Water Limited | Pennon Group PLC | utilities and power generation | water pollution violation | 2017 | UK-EA | £175,000 |
| Biffa Waste Services Limited | Energy Capital Partners | private equity (including portfolio companies) | environmental violation | 2020 | UK-EA | £175,000 |
| Biffa Waste Services Limited | Energy Capital Partners | private equity (including portfolio companies) | environmental violation | 2020 | UK-EA | £175,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2014 | UK-EA | £169,000 |
| Ineos Chlor Vinyls Limited | Ineos | chemicals | water pollution violation | 2016 | UK-EA | £166,650 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2021 | UK-EA | £165,000 |
| ST REGIS PAPER COMPANY LIMITED | DS Smith PLC | paper and packaging | environmental violation | 2011 | UK-EA | £162,100 |
| Tongfang Global (UK) Co Limited | | | hazardous waste violation | 2018 | UK-NRW | £160,760 |
| Repsol | Repsol | oil and gas | oil drilling violation | 2023 | UK-NSTA | £160,000 |
| Heineken UK Limited | Heineken | beverages | water pollution violation | 2017 | UK-EA | £160,000 |
| SOUTHERN WATER SERVICES LIMITED | Macquarie | financial services | water pollution violation | 2015 | UK-EA | £160,000 |
| WINVIC CONSTRUCTION LIMITED | | | water pollution violation | 2023 | UK-EA | £160,000 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2020 | UK-EA | £158,000 |
| Sarval Limited | | | climate change regime violation | 2015 | UK-EA | £157,857 |
| J C Bamford Excavators Ltd | | | environmental violation | 2016 | UK-EA | £157,596 |
| Broadland Wineries Limited | | | environmental violation | 2014 | UK-EA | £156,548 |
| Anglian Water Services Limited | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2023 | UK-EA | £154,438 |
| AWPR B-T Construction Joint Venture | | | environmental violation | 2017 | UK-SEPA | £152,808 |
| Fuerst Day Lawson Limited | | | water pollution violation | 2019 | UK-EA | £150,000 |
| SHELL UK LIMITED | Shell PLC | oil and gas | water pollution violation | 2011 | UK-EA | £150,000 |
| Thames Water Utilities Ltd | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £150,000 |
| METAL AND WASTE RECYCLING LIMITED | | | environmental violation | 2011 | UK-EA | £150,000 |
| YORKSHIRE WATER SERVICES LIMITED | Kelda Group | utilities and power generation | water pollution violation | 2021 | UK-EA | £150,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2022 | UK-EA | £150,000 |
| EnQuest Heather Limited | EnQuest PLC | oil and gas | oil drilling violation | 2022 | UK-NSTA | £150,000 |
| Kafish B.V. | | | commercial fishing violation | 2017 | UK-MMO | £149,670 |
| Anglian Water Limited | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2019 | UK-EA | £146,000 |
| Biolab (UK) Limited | | | water pollution violation | 2010 | UK-EA | £146,000 |
| M E FOLEY (CONTRACTORS) LIMITED | | | environmental violation | 2021 | UK-EA | £144,000 |
| SHELL UK LIMITED | Shell PLC | oil and gas | water pollution violation | 2011 | UK-EA | £140,000 |
| SHELL UK LIMITED | Shell PLC | oil and gas | environmental violation | 2011 | UK-EA | £140,000 |
| SHELL UK LIMITED | Shell PLC | oil and gas | environmental violation | 2011 | UK-EA | £140,000 |
| SHELL UK LIMITED | Shell PLC | oil and gas | environmental violation | 2011 | UK-EA | £140,000 |
| R Plevin & Sons Ltd | R Plevin & Sons Ltd | building materials | water pollution violation | 2020 | UK-EA | £140,000 |
| R H Amar & Co Limited | | | environmental violation | 2013 | UK-EA | £137,426 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2018 | UK-EA | £135,000 |
| Donald Ward Ltd | | | environmental violation | 2016 | UK-EA | £135,000 |
| South West Water Limited | Pennon Group PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £134,000 |
| Sembcorp Bournemouth Water | Pennon Group PLC | utilities and power generation | water pollution violation | 2015 | UK-DWI | £133,892 |
| Lacka Foods Limited | | | environmental violation | 2023 | UK-EA | £133,127 |
| Pelagia UK Limited | | | climate change regime violation | 2021 | UK-SEPA | £133,098 |
| ABBEY METAL FINISHING COMPANY LIMITED | | | water pollution violation | 2013 | UK-EA | £133,000 |
| Anglian Water Services Limited | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2020 | UK-EA | £130,000 |
| UNITED UTILITIES WATER PLC | United Utilities Group PLC | utilities and power generation | environmental violation | 2011 | UK-EA | £130,000 |
| Kerry Ingredients (UK) Limited | Kerry Group | food products | environmental violation | 2017 | UK-EA | £127,975 |
| Ensus UK Limited | | | climate change regime violation | 2021 | UK-EA | £126,787 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2021 | UK-EA | £122,520 |
| LEC (L'Pool) Limited | | | environmental violation | 2019 | UK-EA | £121,700 |
| Sandoz Limited | Sandoz Group | pharmaceuticals | environmental violation | 2017 | UK-EA | £120,932 |
| Carlsberg Supply Company UK Limited | Carlsberg A/S | beverages | environmental violation | 2018 | UK-EA | £120,000 |
| Gonzalez Byass UK Limited | | | environmental violation | 2016 | UK-EA | £120,000 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2016 | UK-EA | £120,000 |
| Harron Homes Limited | | | water pollution violation | 2017 | UK-EA | £120,000 |
| Springhill Farms (Pershore) Ltd | | | environmental violation | 2022 | UK-EA | £120,000 |
| Execujet Middle East Llc | | | environmental violation | 2017 | UK-EA | £115,300 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2021 | UK-EA | £115,000 |
| Associated Waste Management Ltd | Macquarie | financial services | environmental violation | 2017 | UK-EA | £112,500 |
| Weetabix Limited | Post Holdings | food products | water pollution violation | 2019 | UK-EA | £112,000 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2021 | UK-EA | £112,000 |
| CHARLES ROBERTSON (DEVELOPMENTS) LIMITED | | | environmental violation | 2011 | UK-EA | £111,000 |
| Anglo Beef Processors UK | | | water pollution violation | 2020 | UK-EA | £110,000 |
| Affinity Water Limited | Daiwater Investment Limited | utilities and power generation | water pollution violation | 2018 | UK-EA | £110,000 |
| Southern Water Services Ltd | Macquarie | financial services | water pollution violation | 2018 | UK-DWI | £109,620 |
| Exhaust Tyres and Batteries (Worcester) Limited | | | environmental violation | 2023 | UK-EA | £107,463 |
| Addo Food Group Limited | | | environmental violation | 2023 | UK-EA | £104,000 |
| B Braun Medical Limited | B. Braun Melsungen | medical equipment and supplies | environmental violation | 2012 | UK-EA | £103,000 |
| Suez Recycling and Recovery UK Limited | Suez Group | waste management and environmental services | water pollution violation | 2018 | UK-EA | £101,700 |
| Prax Lindsey Oil Refinery Limited | Prax Group | oil and gas | environmental violation | 2023 | UK-EA | £100,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2023 | UK-EA | £100,000 |
| Sellafield Limited | Sellafield Limited | miscellaneous services | environmental violation | 2013 | UK-EA | £100,000 |
| Sellafield Limited | Sellafield Limited | miscellaneous services | environmental violation | 2013 | UK-EA | £100,000 |
