| 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 |
| Tarmac | CRH PLC | building materials | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Railway Assessment Centre Forum | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Glencore Energy (UK) Ltd | Glencore | financial services | bribery | 2022 | UK-SFO | £0 |
| Waitrose | John Lewis Partnership | retailing | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Motorola Solutions UK Limited | Motorola Solutions | telecommunications | price-fixing or anti-competitive practices | 2022 | UK-OFCOM | £0 |
| Motorola Solutions, Inc. | Motorola Solutions | telecommunications | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Adret Ltd and Berangere Ltd | | | energy market violation | 2015 | UK-OFGEM | £0 |
| UK Capacity Reserve | | | energy market violation | 2015 | UK-OFGEM | £0 |
| Deutsche Bank | Deutsche Bank | financial services | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Citigroup Global Markets Limited | Citigroup | financial services | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| J Sainsbury plc | J Sainsbury PLC | retailing | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Asda | EG Group | retailing | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| JD Sports Fashion plc | JD Sports Fashion | retailing | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
