| Transport for London | | | workplace safety or health violation | 2023 | UK-ORR | £10,000,000 |
| WH Malcolm Limited | | | workplace safety or health violation | 2021 | UK-ORR | £6,500,000 |
| Valero Energy UK Ltd | Valero Energy | oil and gas | workplace safety or health violation | 2019 | UK-HSE | £6,000,000 |
| Northern Gas Networks Ltd | Northern Gas Networks | utilities and power generation | workplace safety or health violation | 2022 | UK-HSE | £5,091,487 |
| Merlin Attractions Operations Limited | Merlin Entertainments Limited | entertainment | workplace safety or health violation | 2015 | UK-HSE | £5,069,955 |
| Kier Infrastructure and Overseas Limited | Kier Group PLC | construction and engineering | workplace safety or health violation | 2023 | UK-HSE | £4,502,759 |
| Network Rail | Network Rail | miscellaneous services | railroad safety violation | 2012 | UK-ORR | £4,118,052 |
| National Grid Gas PLC | National Gas Transmission PLC | utilities and power generation | workplace safety or health violation | 2016 | UK-HSE | £4,091,805 |
| Network Rail | Network Rail | miscellaneous services | railroad safety violation | 2016 | UK-ORR | £4,035,000 |
| Tram Operations Limited | | | workplace safety or health violation | 2023 | UK-ORR | £4,000,000 |
| Greenfeeds Ltd | | | workplace safety or health violation | 2022 | UK-CPS | £4,000,000 |
| Cleveland Potash Limited | ICL Group | chemicals | workplace safety or health violation | 2022 | UK-HSE | £3,785,000 |
| Chrysaor Production (U.K.) Limited | Harbour Energy PLC | oil and gas | workplace safety or health violation | 2012 | UK-HSE | £3,159,458 |
| Network Rail | Network Rail | miscellaneous services | railroad safety violation | 2011 | UK-ORR | £3,150,000 |
| Carlsberg Marston’s Brewing Company | Carlsberg A/S | beverages | workplace safety or health violation | 2022 | UK-HSE | £3,090,000 |
| Porvi Construcciones y Contratas S.L. | | | workplace safety or health violation | 2015 | UK-HSE | £3,075,370 |
| DB Cargo (UK) Limited | Deutsche Bahn | freight and logistics | railroad safety violation | 2019 | UK-ORR | £2,922,373 |
| Serco Ltd. | Serco Group | miscellaneous services | workplace safety or health violation | 2023 | UK-HSE | £2,683,596 |
| Balfour Beatty Utility Solutions Limited | Balfour Beatty | construction and engineering | workplace safety or health violation | 2010 | UK-HSE | £2,654,776 |
| Ward Recycling Ltd | | | workplace safety or health violation | 2023 | UK-CPS | £2,500,000 |
| London and South Eastern Railways | Go-Ahead Group PLC | miscellaneous services | workplace safety or health violation | 2017 | UK-ORR | £2,500,000 |
| Exolum Pipeline System Ltd fka CLH Pipeline System | | | workplace safety or health violation | 2023 | UK-HSE | £2,457,431 |
| Tronox Pigment UK Limited | Tronox | chemicals | workplace safety or health violation | 2010 | UK-HSE | £2,418,934 |
| Ward Recycling Limited | | | workplace safety or health violation | 2024 | UK-HSE | £2,150,000 |
| Svitzer Marine Ltd | | | workplace safety or health violation | 2023 | UK-MCA | £2,136,711 |
| Alutrade | Alutrade Management Team Investments Limited Company | waste management and environmental services | workplace safety or health violation | 2022 | UK-CPS | £2,105,514 |
| National Grid Gas PLC | National Gas Transmission PLC | utilities and power generation | workplace safety or health violation | 2014 | UK-HSE | £2,036,103 |
| Bakkavor Holdings Limited | Bakkavor Group | food products | workplace safety or health violation | 2015 | UK-HSE | £2,032,595 |
| Leadec Limited | | | workplace safety or health violation | 2017 | UK-HSE | £2,030,000 |
| Warburtons Limited | Warburtons | food products | workplace safety or health violation | 2013 | UK-HSE | £2,019,609 |
| Celsa Manufacturing (UK) Limited | | | workplace safety or health violation | 2015 | UK-HSE | £1,945,772 |
| Warburtons Limited | Warburtons | food products | workplace safety or health violation | 2015 | UK-HSE | £1,921,460 |
| Turners (Soham) Limited | | | workplace safety or health violation | 2023 | UK-HSE | £1,907,300 |
| Karro Food Group Limited | Sofina Foods | food products | workplace safety or health violation | 2016 | UK-HSE | £1,874,020 |
| South West Water Ltd | Pennon Group PLC | utilities and power generation | workplace safety or health violation | 2013 | UK-HSE | £1,841,608 |
| British Airways Plc | International Airlines Group | airlines | workplace safety or health violation | 2021 | UK-HSE | £1,835,724 |
| Associated British Ports Holdings Ltd | | | workplace safety or health violation | 2021 | UK-HSE | £1,831,694 |
| Tata Steel UK Limited | Tata Group | diversified | workplace safety or health violation | 2012 | UK-HSE | £1,822,517 |
| Kier Integrated Services Limited | Kier Group PLC | construction and engineering | workplace safety or health violation | 2014 | UK-HSE | £1,812,406 |
| VPI Power Limited | | | workplace safety or health violation | 2013 | UK-HSE | £1,750,000 |
| Essar Oil (UK) Limited | Essar Group | diversified | workplace safety or health violation | 2013 | UK-HSE | £1,707,645 |
| Tyne and Wear Passenger Transport Executive dba Nexus | | | workplace safety or health violation | 2021 | UK-ORR | £1,672,390 |
| Bupa Care Homes (BNH) Limited | Bupa | healthcare services | workplace safety or health violation | 2015 | UK-HSE | £1,651,482 |
| Martin-Baker Aircraft Company Limited | | | workplace safety or health violation | 2011 | UK-HSE | £1,650,000 |
| Marks & Spencer PLC | Marks and Spencer Group PLC | retailing | workplace safety or health violation | 2011 | UK-HSE | £1,600,000 |
| Essex Partnership University NHS Foundation Trust | | | workplace safety or health violation | 2021 | UK-HSE | £1,586,222 |
| Tata Steel UK Limited | Tata Group | diversified | workplace safety or health violation | 2010 | UK-HSE | £1,540,000 |
| Tuffnells Parcels Express Limited | | | workplace safety or health violation | 2016 | UK-HSE | £1,532,823 |
| Cleveland Bridge UK Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £1,529,239 |
| Kier Integrated Services Limited | Kier Group PLC | construction and engineering | workplace safety or health violation | 2012 | UK-HSE | £1,523,327 |
| Siemens PLC | Siemens | diversified | workplace safety or health violation | 2023 | UK-ORR | £1,499,284 |
| Tarmac Aggregates Limited | CRH PLC | building materials | workplace safety or health violation | 2023 | UK-HSE | £1,475,000 |
| Network Rail | Network Rail | miscellaneous services | workplace safety or health violation | 2022 | UK-ORR | £1,463,308 |
| Costain Limited | Costain Group PLC | construction and engineering | workplace safety or health violation | 2015 | UK-HSE | £1,450,731 |
| Galliford Try Construction Limited | Galliford Try Holdings PLC | construction and engineering | workplace safety or health violation | 2015 | UK-HSE | £1,450,731 |
| 2 Sisters Food Group Limited | Boparan Holdings Limited | food products | workplace safety or health violation | 2012 | UK-HSE | £1,438,000 |
| Total UK Limited | TotalEnergies SE | oil and gas | workplace safety or health violation | 2010 | UK-HSE | £1,434,084 |
| Tarmac Trading Limited | CRH PLC | building materials | workplace safety or health violation | 2012 | UK-HSE | £1,430,000 |
| H Weston and Sons Limited | | | workplace safety or health violation | 2023 | UK-HSE | £1,426,756 |
| Sembcorp Utilities (UK) Limited | | | workplace safety or health violation | 2013 | UK-HSE | £1,391,163 |
| Hawkeswood Metal Recycling Limited | | | workplace safety or health violation | 2023 | UK-HSE | £1,387,500 |
| Mid-UK Recycling Limited | | | workplace safety or health violation | 2015 | UK-HSE | £1,320,066 |
| Explore Manufacturing Limited | Laing O'Rourke | construction and engineering | workplace safety or health violation | 2014 | UK-HSE | £1,313,942 |
| Rhino Construction & Building Services Limited | | | workplace safety or health violation | 2017 | UK-HSE | £1,304,745 |
| Shell U.K. Limited | Shell PLC | oil and gas | workplace safety or health violation | 2023 | UK-HSE | £1,278,250 |
| Willmott Partnership Homes Limited | Willmott Dixon Limited | construction and engineering | workplace safety or health violation | 2014 | UK-HSE | £1,273,972 |
| Industrial Chemicals Limited | Industrial Chemicals Group | chemicals | workplace safety or health violation | 2013 | UK-HSE | £1,235,854 |
| Howden Joinery Limited | Howden Joinery Group PLC | building materials | workplace safety or health violation | 2014 | UK-HSE | £1,233,902 |
| DB Cargo (UK) Limited | Deutsche Bahn | freight and logistics | railroad safety violation | 2020 | UK-ORR | £1,227,873 |
| Costain Limited | Costain Group PLC | construction and engineering | workplace safety or health violation | 2015 | UK-HSE | £1,221,645 |
| Phillips 66 Limited | Phillips 66 | oil and gas | workplace safety or health violation | 2013 | UK-HSE | £1,220,450 |
| Southern Gas Networks Plc | SGN | utilities and power generation | workplace safety or health violation | 2016 | UK-HSE | £1,218,975 |
| Select Plant Hire Company Limited | Laing O'Rourke | construction and engineering | workplace safety or health violation | 2014 | UK-HSE | £1,213,942 |
| Dyson Technology Limited | | | workplace safety or health violation | 2022 | UK-HSE | £1,211,511 |
| Network Rail Infrastructure Limited | Network Rail | miscellaneous services | workplace safety or health violation | 2023 | UK-HSE | £1,211,410 |
| Martinisation Ltd | | | workplace safety or health violation | 2017 | UK-CPS | £1,200,000 |
| Juniper (No.3) Limited | | | workplace safety or health violation | 2011 | UK-HSE | £1,200,000 |
| Modus Workspace Limited | | | workplace safety or health violation | 2016 | UK-HSE | £1,168,116 |
| Rockrose UKCS8 LLC | | | workplace safety or health violation | 2015 | UK-HSE | £1,168,000 |
| United Lincolnshire Hospitals NHS Trust | | | workplace safety or health violation | 2012 | UK-HSE | £1,160,000 |
| UK Power Networks (Operations) Limited | UK Power Networks | utilities and power generation | workplace safety or health violation | 2012 | UK-HSE | £1,153,459 |
| Sabrewatch Limited | | | security industry violation | 2010 | UK-SIA | £1,140,000 |
| Veolia UK Limited | Veolia Group | waste management and environmental services | workplace safety or health violation | 2013 | UK-HSE | £1,130,000 |
| Southern Health NHS Foundation Trust | | | workplace safety or health violation | 2013 | UK-HSE | £1,125,199 |
| Total Energies E&P UK Limited | TotalEnergies SE | oil and gas | workplace safety or health violation | 2012 | UK-HSE | £1,125,000 |
| Clancy Docwra Limited | | | workplace safety or health violation | 2014 | UK-HSE | £1,108,502 |
| BAM Ferrovial Kier JV | | | workplace safety or health violation | 2014 | UK-HSE | £1,107,337 |
| Wettons Cleaning Services | | | workplace safety or health violation | 2017 | UK-ORR | £1,100,000 |
| Watling Tyre Service Limited (The) | | | workplace safety or health violation | 2016 | UK-HSE | £1,099,486 |
| Enterprise Managed Services Limited | | | workplace safety or health violation | 2016 | UK-HSE | £1,080,476 |
| Network Rail | Network Rail | miscellaneous services | railroad safety violation | 2012 | UK-ORR | £1,060,015 |
| Sheffield Forgemasters Engineering Limited | | | workplace safety or health violation | 2013 | UK-HSE | £1,058,009 |
| Govia Thameslink Railway Ltd | Go-Ahead Group PLC | miscellaneous services | railroad safety violation | 2019 | UK-ORR | £1,052,267 |
| Creagh Concrete Products Limited | | | workplace safety or health violation | 2023 | UK-HSE | £1,047,521 |
| BUPA Care Services (ANS) Ltd | Bupa | healthcare services | fire safety violation | 2022 | UK-LFB | £1,041,500 |
| Aster Health Care Ltd | | | workplace safety or health violation | 2021 | UK-CPS | £1,040,000 |
| Synergy Housing Limited | Aster Group | miscellaneous services | workplace safety or health violation | 2011 | UK-HSE | £1,040,000 |
| CAV Aerospace Limited | | | workplace safety or health violation | 2014 | UK-HSE | £1,030,351 |
| Greencore Grocery Limited | Greencore Group PLC | food products | workplace safety or health violation | 2013 | UK-HSE | £1,030,000 |
| Glynwed Pipe Systems Ltd | Aliaxis SA | industrial equipment | workplace safety or health violation | 2015 | UK-HSE | £1,027,943 |
| National Grid Gas PLC | National Gas Transmission PLC | utilities and power generation | workplace safety or health violation | 2014 | UK-HSE | £1,026,296 |
