| Trinity Mirror Southern Ltd. and Trinity Mirror plc | | | price-fixing or anti-competitive practices | 2015 | UK-CMA | £91,257 |
| Waterfords (Estate Agents) Limited | | | price-fixing or anti-competitive practices | 2015 | UK-CMA | £46,186 |
| Castles Property Services Limited | | | price-fixing or anti-competitive practices | 2015 | UK-CMA | £17,348 |
| Three Counties Estate Agents Limited | | | price-fixing or anti-competitive practices | 2015 | UK-CMA | £90 |
| epyx Limited | | | price-fixing or anti-competitive practices | 2014 | UK-CMA | £0 |
| Salegroup Limited (The) | | | price-fixing or anti-competitive practices | 2019 | UK-OFCOM | £40,000 |
| 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 |
| Hamsard 3149 Ltd. and Quantum Pharmaceutical Ltd. and Total Medication Management System dba Tomms Pharmacy | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £370,226 |
| Cirrus and Careline UK Monitoring Limited and Peverel Building Technologies Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| Glyn Jackson Communications Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £35,700 |
| Peter O'Rourke Electrical Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £15,933 |
| Owens Installations Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £1,777 |
| 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 |
| Ciceley Commercials Limited and Ciceley Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £659,675 |
| Enza Motors Limited and Enza Holdings Limited and Enza Group Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £347,198 |
| H&L Garages Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £242,076 |
| Road Range Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £115,774 |
| UK Asbestos Training Association | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| JCDecaux UK | | | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Ageas Insurance Ltd. | | | 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 |
| Robert Wiseman & Sons Limited and Robert Wiseman Dairies plc | | | price-fixing or anti-competitive practices | 2011 | UK-OFT | £3,200,000 |
| The Cheese Company Ltd. and Waterford Foods International Ltd. and Glanbia Investments (UK) Ltd. and Glanbia (UK) Ltd. | | | price-fixing or anti-competitive practices | 2011 | UK-OFT | £1,260,000 |
| Avro Energy | | | energy market violation | 2021 | UK-OFGEM | £30,000 |
| Entice Energy | | | energy market violation | 2021 | UK-OFGEM | £20,000 |
| Symbio Energy Limited | | | energy market violation | 2021 | UK-OFGEM | £100,000 |
| Robin Hood Energy Limited | | | energy market violation | 2020 | UK-OFGEM | £12,091,824 |
| iSupply Energy | | | consumer protection violation | 2020 | UK-OFGEM | £520,539 |
| Bulb | | | consumer protection violation | 2020 | UK-OFGEM | £1,757,837 |
| E (Gas and Electricity) Limited | | | consumer protection violation | 2020 | UK-OFGEM | £0 |
| iSupply | | | consumer protection violation | 2020 | UK-OFGEM | £1,500,000 |
| Hudson Energy Supply UK Ltd | | | consumer protection violation | 2020 | UK-OFGEM | £750,000 |
| Hornsea 1 Limited | | | energy market violation | 2020 | UK-OFGEM | £4,500,000 |
| Eastern Power Networks plc and South Eastern Power Networks plc | | | energy market violation | 2020 | UK-OFGEM | £1,500,000 |
| GNERGYLimited | | | energy market violation | 2019 | UK-OFGEM | £673,876 |
| Hudson Energy Supply UK Ltd. | | | consumer protection violation | 2019 | UK-OFGEM | £350,000 |
| EPEX Spot SE and EEX | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £0 |
| E (Gas and Electricity) Ltd | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £650,000 |
| Economy Energy Trading Ltd | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £200,000 |
| Dyball Associates | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £20,000 |
| iSupply Energy | | | consumer protection violation | 2019 | UK-OFGEM | £28,183 |
| URE Energy Limited | | | energy market violation | 2019 | UK-OFGEM | £209,013 |
| Hudson Energy Supply UK Ltd | | | consumer protection violation | 2018 | UK-OFGEM | £477,039 |
| Utilita | | | consumer protection violation | 2017 | UK-OFGEM | £3,580,000 |
| Intergen | | | energy market violation | 2015 | UK-OFGEM | £11,000,000 |
| Electricity North West Limited | | | price-fixing or anti-competitive practices | 2012 | UK-OFGEM | £0 |
| Central Networks East plc and Central Networks West plc | | | energy market violation | 2011 | UK-OFGEM | £400,000 |
| Electricity North West Limited | | | energy market violation | 2011 | UK-OFGEM | £100,000 |
| allpay Limited | | | price-fixing or anti-competitive practices | 2022 | UK-PSR | £28,553 |
| Prepaid Financial Services Limited | | | price-fixing or anti-competitive practices | 2022 | UK-PSR | £916,746 |
| Airline Services Limited | | | bribery | 2020 | UK-SFO | £2,979,685 |
| Guralp Systems Ltd | | | bribery | 2019 | UK-SFO | £2,069,861 |
| Sarclad Ltd | | | bribery | 2019 | UK-SFO | £6,553,085 |
| FH Bertling Ltd | | | bribery | 2019 | UK-SFO | £850,000 |
| Sweett Group PLC | | | bribery | 2016 | UK-SFO | £2,250,000 |
| Smith and Ouzman Ltd | | | bribery | 2016 | UK-SFO | £2,200,000 |
| Oxford Publishing Limited | | | bribery | 2012 | UK-SFO | £1,895,435 |
| M.W. Kellogg Limited | | | bribery | 2011 | UK-SFO | £7,028,077 |
| Symbio Energy Limited | | | consumer protection violation | 2021 | UK-OFGEM | £0 |
| Whoop Energy | | | energy market violation | 2021 | UK-OFGEM | £56,306 |
| ION Investment Group Limited and ION Trading Technologies Limited | | | price-fixing or anti-competitive practices | 2021 | UK-CMA | £325,000 |
| Ampoweruk | | | energy market violation | 2021 | UK-OFGEM | £3,590,237 |
| ESB Independent Generation Trading Limited and Carrington Power Limited | | | energy market violation | 2021 | UK-OFGEM | £6,000,000 |
| Advanced Payment Solutions | | | price-fixing or anti-competitive practices | 2022 | UK-PSR | £755,419 |
| Sulion | | | price-fixing or anti-competitive practices | 2022 | UK-PSR | £572 |
| Footasylum | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £400,000 |
| Railway Assessment Centre Forum | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Elite Sports Group Limited and Elite Corporation Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £459,000 |
| Rangers Football Club Limited and Rangers International Football Club Plc | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £225,000 |
| Flynn Pharma Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £6,704,422 |
| Sepura | | | price-fixing or anti-competitive practices | 2022 | UK-OFCOM | £1,500,000 |
| Erith Contractors Ltd and Erith Holdings Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £17,568,800 |
| Keltbray Ltd and Keltbray Holdings Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £16,000,000 |
| T. E. Scudder Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £8,256,264 |
| John F Hunt Ltd and John F Hunt Group Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £5,600,000 |
| McGee Group (Holdings) Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £3,766,278 |
| Brown and Mason Group Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £2,400,000 |
| Squibb Group Ltd. | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £2,000,000 |
| Cantillon Ltd and Cantillon Holdings Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £1,920,000 |
| DSM Demolition Ltd et al. | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £1,400,000 |
| Clifford Devlin Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £423,615 |
| Delta Gas and Power Limited | | | energy market violation | 2023 | UK-OFGEM | £70,000 |
| Delta Gas and Power Limited | | | energy market violation | 2022 | UK-OFGEM | £57,000 |
