| Whoop Energy | | | energy market violation | 2021 | UK-OFGEM | £56,306 |
| 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 |
| PayPoint Plc | PayPoint Group | financial services | energy market violation | 2021 | UK-OFGEM | £12,500,000 |
| Delta Gas and Power Limited | | | energy market violation | 2023 | UK-OFGEM | £70,000 |
| Drax Pumped Storage Limited | Drax Group PLC | utilities and power generation | energy market violation | 2023 | UK-OFGEM | £6,120,000 |
| Delta Gas and Power Limited | | | energy market violation | 2022 | UK-OFGEM | £57,000 |
| EDF Energy (Thermal Generation) Limited | EDF-Electricite de France | utilities and power generation | energy market violation | 2020 | UK-OFGEM | £6,000,000 |
| Nabuh Energy Ltd | | | energy market violation | 2020 | UK-OFGEM | £2,683,631 |
| Symbio Energy Limited | | | energy market violation | 2020 | UK-OFGEM | £506,308 |
| SSE Generation Limited | SSE PLC | utilities and power generation | energy market violation | 2020 | UK-OFGEM | £2,060,000 |
| SSE Energy Services | OVO Energy | utilities and power generation | energy market violation | 2020 | UK-OFGEM | £1,200,000 |
| InterGen | | | energy market violation | 2020 | UK-OFGEM | £37,200,000 |
| Utilita Energy | | | energy market violation | 2019 | UK-OFGEM | £175,000 |
| Cadent Gas Limited | Cadent Gas Limited | utilities and power generation | energy market violation | 2019 | UK-OFGEM | £44,000,000 |
| SSE Energy Services | OVO Energy | utilities and power generation | energy market violation | 2019 | UK-OFGEM | £700,000 |
| SSE Plc | SSE PLC | utilities and power generation | energy market violation | 2019 | UK-OFGEM | £705,000 |
| EDF Energy | EDF-Electricite de France | utilities and power generation | energy market violation | 2018 | UK-OFGEM | £350,000 |
| National Grid | National Grid | utilities and power generation | energy market violation | 2016 | UK-OFGEM | £3,000,000 |
| Adret Ltd and Berangere Ltd | | | energy market violation | 2015 | UK-OFGEM | £0 |
| SSE | SSE PLC | utilities and power generation | energy market violation | 2015 | UK-OFGEM | £100,000 |
| UK Capacity Reserve | | | energy market violation | 2015 | UK-OFGEM | £0 |
| Morgan Stanley & Co. International plc | Morgan Stanley | financial services | energy market violation | 2023 | UK-OFGEM | £5,411,149 |
| SSE Generation Limited | SSE PLC | utilities and power generation | energy market violation | 2023 | UK-OFGEM | £9,780,000 |
| Barclays Bank plc | Barclays | financial services | foreign exchange market manipulation | 2015 | UK-FCA | £284,432,000 |
| UBS AG | UBS | financial services | foreign exchange market manipulation | 2014 | UK-FCA | £233,814,000 |
| Citibank N.A. | Citigroup | financial services | foreign exchange market manipulation | 2014 | UK-FCA | £225,575,000 |
| JPMorgan Chase Bank N.A. | JPMorgan Chase | financial services | foreign exchange market manipulation | 2014 | UK-FCA | £222,166,000 |
| The Royal Bank of Scotland plc | NatWest Group PLC | financial services | foreign exchange market manipulation | 2014 | UK-FCA | £217,000,000 |
| HSBC Bank plc | HSBC | financial services | foreign exchange market manipulation | 2014 | UK-FCA | £216,363,000 |
| Hillside (UK Sports) ENC | bet365 | entertainment | gambling industry violation | 2024 | UK-GC | £239,085 |
| Hillside (UK Gaming) ENC | bet365 | entertainment | gambling industry violation | 2024 | UK-GC | £343,035 |
| 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 |
| Deutsche Bank AG | Deutsche Bank | financial services | interest rate benchmark manipulation | 2015 | UK-FCA | £226,800,000 |
| Lloyds Bank plc and Bank of Scotland plc | Lloyds Banking Group | financial services | interest rate benchmark manipulation | 2014 | UK-FCA | £105,000,000 |
| Martin Brokers (UK) Ltd | | | interest rate benchmark manipulation | 2014 | UK-FCA | £630,000 |
| Cooperatieve Centrale Raiffeisen-Boerenleenbank B.A. | Rabobank | financial services | interest rate benchmark manipulation | 2013 | UK-FCA | £105,000,000 |
| ICAP Europe Ltd | TP ICAP PLC | financial services | interest rate benchmark manipulation | 2013 | UK-FCA | £14,000,000 |
| The Royal Bank of Scotland plc | NatWest Group PLC | financial services | interest rate benchmark manipulation | 2013 | UK-FSA | £87,500,000 |
| UBS AG | UBS | financial services | interest rate benchmark manipulation | 2012 | UK-FSA | £160,000,000 |
| Barclays Bank plc | Barclays | financial services | interest rate benchmark manipulation | 2012 | UK-FSA | £59,500,000 |
| ICC Intercertus Capital Ltd | | | investor protection violation | 2021 | UK-FCA | £0 |
| Sapien Capital Ltd | | | investor protection violation | 2021 | UK-FCA | £178,000 |
| Finteractive Limited (trading as FXVC) | | | investor protection violation | 2021 | UK-FCA | £0 |
| 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 |
| Hafiz Bros Travel & Money Transfer Limited | | | price-fixing or anti-competitive practices | 2023 | UK-FCA | £11,200 |
| LCC Trans-Sending Ltd. and Small World Financial Services Group Ltd. t/a Small World | | | price-fixing or anti-competitive practices | 2023 | UK-FCA | £139,500 |
| Copart, Inc. and CPRT LLP and Copart UK Ltd. | Copart Inc. | information services | price-fixing or anti-competitive practices | 2023 | UK-CMA | £2,500,000 |
| Dollar East (International Travel & Money Transfer) Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-FCA | £3,600 |
| 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 |
| Advanz Pharma | Nordic Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2021 | UK-CMA | £40,900,000 |
| Waymade Plc | | | price-fixing or anti-competitive practices | 2021 | UK-CMA | £2,500,000 |
| Roland (U.K.) Limited and Roland Corp. | | | price-fixing or anti-competitive practices | 2021 | UK-CMA | £5,004,151 |
| Lexon (UK) Limited | Bestway Healthcare | healthcare services | price-fixing or anti-competitive practices | 2021 | UK-CMA | £1,220,383 |
| FP McCann Limited | FP McCann Limited | construction and engineering | price-fixing or anti-competitive practices | 2020 | UK-CMA | £25,449,676 |
| 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 |
| Vp plc | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £11,235,660 |
| M.G.F (Trench Construction Systems) Ltd | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £3,773,910 |
| Hanson UK | HeidelbergCement | building materials | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| H.J. Enthoven Limited and Eco-Bat Technologies Limited | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £8,076,504 |
| Associated Lead Mills Limited and Royston Sheet Lead Limited and International Metal Industries Limited | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £1,510,228 |
| Yamaha Music Europe GmbH | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| GAK.co.uk Ltd. and The Guitar, Amp & Keyboard Centre Ltd. and GAK.co.uk (Holdings) Ltd. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £278,945 |
| Amilco Ltd. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Aspen Pharmacare Holdings Ltd. et al. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £10,101,954 |
| Tiofarma Beheer B.V. and Tiofarma B.V. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £186,442 |
| Spire Healthcare Ltd. and Spire Healthcare Group plc | Spire Healthcare PLC | healthcare services | price-fixing or anti-competitive practices | 2020 | UK-CMA | £1,200,000 |
| Korg (UK) Ltd. and Korg Inc. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £1,504,707 |
| Auden Mckenzie (Pharma Division) Ltd. and Accord-UK Ltd. | Intas Pharmaceuticals Ltd. | pharmaceuticals | price-fixing or anti-competitive practices | 2020 | UK-CMA | £2,882,238 |
| Alissa Healthcare Research Ltd. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £174,912 |
| King Pharmaceuticals Ltd. and Praze Consultants Ltd. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £75,573 |
| King Pharmaceuticals Ltd. and Praze Consultants Ltd. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £75,573 |
| Tesco plc | Tesco PLC | retailing | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Fender Musical Instruments Europe Ltd. and Fender Musical Instruments Corp. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £4,531,185 |
| The Romans Group (UK) Limited and Romans 1 Limited | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £0 |
| Prospect Estate Agency Limited and Prospect Holdings (Reading) Limited | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £268,765 |
| Richard Worth Limited and Richard Worth Holdings Limited | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £193,911 |
| Michael Hardy & Company (Wokingham) Limited and Geocharbert UK Ltd | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £142,843 |
| Stanton Bonna Concrete Limited et al. | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £7,474,745 |
| CPM Group Limited | Marshalls PLC | building materials | price-fixing or anti-competitive practices | 2019 | UK-CMA | £4,000,000 |
| Casio Electronics Co. Ltd. and Casio Computer Co., Ltd. | Casio Computer Co. | miscellaneous manufacturing | price-fixing or anti-competitive practices | 2019 | UK-CMA | £3,695,535 |
| 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 |
