| Marks and Spencer plc | Marks and Spencer Group PLC | retailing | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Wm Morrison Supermarkets Limited | Clayton Dubilier & Rice | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Freightliner | Brookfield Corporation | diversified | price-fixing or anti-competitive practices | 2015 | UK-ORR | £0 |
| Rail Assessment Centre Forum (RACF) | | | price-fixing or anti-competitive practices | 2022 | UK-ORR | £0 |
| Severn Trent PLC | Severn Trent PLC | utilities and power generation | price-fixing or anti-competitive practices | 2012 | UK-OFWAT | £0 |
| Thames Water | Thames Water Utilities Ltd. | utilities and power generation | price-fixing or anti-competitive practices | 2022 | UK-OFWAT | £0 |
| Bristol Water | Pennon Group PLC | utilities and power generation | price-fixing or anti-competitive practices | 2015 | UK-OFWAT | £0 |
| East Midlands International Airport Ltd | | | price-fixing or anti-competitive practices | 2016 | UK-CAA | £0 |
| Prestige Parking Ltd | | | price-fixing or anti-competitive practices | 2016 | UK-CAA | £0 |
| Education Software Solutions Limited | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| DFDS A/S | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| P&O Ferries Holdings Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Moto Hospitality Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Moto Holdings Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Roadchef Limited | Macquarie | financial services | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Extra MSA Property (UK) Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Google | Alphabet Inc. | information technology | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Showmen's Guild of Great Britain | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £0 |
| ATG Media | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £0 |
| Bank of Ireland UK plc | Bank of Ireland | financial services | banking violation | 2021 | UK-CMA | £0 |
| Monzo Bank Limited | | | banking violation | 2021 | UK-CMA | £0 |
| NatWest Group | NatWest Group PLC | financial services | banking violation | 2021 | UK-CMA | £0 |
| Assist UK Group Limited | | | consumer protection violation | 2021 | UK-FCA | £0 |
| Consumer Money Worries Ltd | | | consumer protection violation | 2021 | UK-FCA | £0 |
| Debt Help Limited | | | consumer protection violation | 2021 | UK-FCA | £0 |
| Faith Financial Solutions Ltd | | | consumer protection violation | 2021 | UK-FCA | £0 |
| Two Financial Services Limited | | | consumer protection violation | 2021 | UK-FCA | £0 |
| ICC Intercertus Capital Ltd | | | investor protection violation | 2021 | UK-FCA | £0 |
| Finteractive Limited (trading as FXVC) | | | investor protection violation | 2021 | UK-FCA | £0 |
| Premier FX Limited | | | consumer protection violation | 2021 | UK-FCA | £0 |
| Virgin Money UK plc | Virgin Money UK PLC | financial services | banking violation | 2021 | UK-CMA | £0 |
| Co-operative Group Limited | Co-operative Group Limited | retailing | Groceries Supply Code of Conduct violation | 2019 | UK-GCA | £0 |
| Tesco | Tesco PLC | retailing | Groceries Supply Code of Conduct violation | 2016 | UK-GCA | £0 |
| Essential Pharma | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Mabey Hire Ltd | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Hanson UK | HeidelbergCement | building materials | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Yamaha Music Europe GmbH | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Amilco Ltd. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Tesco plc | Tesco PLC | retailing | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| The Romans Group (UK) Limited and Romans 1 Limited | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £0 |
| Bluu Solutions Ltd and Bluuco Ltd. and Tetris Projects Ltd. and Jones Lang LaSalle Inc. | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £0 |
| Heathrow T5 Ltd. and Arora Holdings Ltd. | | | price-fixing or anti-competitive practices | 2018 | UK-CMA | £0 |
| Turner Topco Ltd. and ATG Media Holdings Ltd. and ATG Media Ltd. and Metropress Ltd. | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £0 |
| Annagram Estates Limited dba CJ Hole | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £0 |
| BHK (UK) Ltd. and BHK Holz-u Kunststoff KG | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £0 |
| British Gas Trading Limited | Centrica | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| E.ON Energy Solutions Limited | E.ON | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| EDF Energy Customers plc | EDF-Electricite de France | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| Npower Group plc | E.ON | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| Scottish Power Energy Retail Limited | Iberdrola | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| Southern Electric Gas Limited | OVO Energy | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| CST Industries (UK) Ltd. and CST Industries Inc. | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| GB eye Limited | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| epyx Limited | | | price-fixing or anti-competitive practices | 2014 | UK-CMA | £0 |
| Certas Energy UK Limited and DCC plc | DCC PLC | business services | price-fixing or anti-competitive practices | 2014 | UK-CMA | £0 |
| Royal Mail Group plc | International Distributions Services PLC | miscellaneous services | price-fixing or anti-competitive practices | 2019 | UK-OFCOM | £0 |
| Better Mobility Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Careco (UK) Ltd. | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Discount Mobility Plus Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Hartmond Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Milton Keynes Mobility Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Mobility 4 U Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| MT Mobility Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Pride Mobility Products Ltd. | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Robert Gregg Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Celesio AG and Lloyds Pharmacy Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Cirrus and Careline UK Monitoring Limited and Peverel Building Technologies Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Careco (UK) Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Discount Mobility Plus Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Discount Mobility Shop Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| GBL Wheelchair Services Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Mobility Independence Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| MT Mobility Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Protec Mobility Trading Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Roma Medical Aids Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Northside Truck & Van Limited and S.A.H. Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| UK Asbestos Training Association | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Clear Channel UK | Clear Channel Outdoor Holdings | business services | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| JCDecaux UK | | | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Avanti Gas Limited | UGI Corp. | utilities and power generation | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| BP Oil UK Limited | BP | oil and gas | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Calor Gas Limited | SHV Holdings | diversified | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Calor Gas Northern Ireland | SHV Holdings | diversified | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| DCC Energy Limited | DCC PLC | business services | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Flogas UK Limited | DCC PLC | business services | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Ageas Insurance Ltd. | | | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Aviva Insurance UK Ltd. | Aviva PLC | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| AXA Insurance UK plc | AXA | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Experian Ltd | Experian | miscellaneous services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Liverpool Victoria Insurance Company Ltd | Allianz | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| RBS Insurance Group Ltd | | | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| SSP Ltd. | | | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Zurich Insurance plc | Zurich Insurance | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Aria Foods Limited and Arla Foods UK Limited | Arla Foods | food products | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Barclays Bank plc | Barclays | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| E (Gas and Electricity) Limited | | | consumer protection violation | 2020 | UK-OFGEM | £0 |
| EPEX Spot SE and EEX | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £0 |
| SSE plc | SSE PLC | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-OFGEM | £0 |
| Electricity North West Limited | | | price-fixing or anti-competitive practices | 2012 | UK-OFGEM | £0 |
| Symbio Energy Limited | | | consumer protection violation | 2021 | UK-OFGEM | £0 |
| Alphabet Inc. and Google UK Ltd. and Google LLC | Alphabet Inc. | information technology | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
