| 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 |
| Sainsbury's Supermarkets Limited and J Sainsbury plc | J Sainsbury PLC | retailing | price-fixing or anti-competitive practices | 2011 | UK-OFT | £11,040,000 |
| Asda Stores Ltd. and Asda Group Ltd. and Wal-Mart Stores (UK) Ltd. and Broadstreet Great Wilson Europe Ltd. | EG Group | retailing | price-fixing or anti-competitive practices | 2011 | UK-OFT | £9,100,000 |
| Dairy Crest Limited and Dairy Crest Group plc | Saputo | food products | price-fixing or anti-competitive practices | 2011 | UK-OFT | £7,140,000 |
| Safeway Stores Limited and Strores Group Limited and Safeway Limited | Clayton Dubilier & Rice | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2011 | UK-OFT | £5,690,000 |
| Robert Wiseman & Sons Limited and Robert Wiseman Dairies plc | | | price-fixing or anti-competitive practices | 2011 | UK-OFT | £3,200,000 |
| Lactalis McLelland Limited | Lactalis | food products | price-fixing or anti-competitive practices | 2011 | UK-OFT | £1,660,000 |
| 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 |
| Reckitt Benckiser Healthcare (UK) Ltd. and Reckitt Benckiser Group plc | Reckitt Benckiser | household and personal care products | price-fixing or anti-competitive practices | 2011 | UK-OFT | £10,175,000 |
| Barclays Bank plc | Barclays | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Royal Bank of Scotland Group plc | NatWest Group PLC | financial services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £28,590,000 |
| 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 |
| 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 |
| Mastercard | MasterCard | financial services | price-fixing or anti-competitive practices | 2022 | UK-PSR | £31,560,062 |
| 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 |
| Facebook | Meta Platforms Inc. | information technology | price-fixing or anti-competitive practices | 2021 | UK-CMA | £50,500,000 |
| ION Investment Group Limited and ION Trading Technologies Limited | | | price-fixing or anti-competitive practices | 2021 | UK-CMA | £325,000 |
| 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 |
| JD Sports | JD Sports Fashion | retailing | price-fixing or anti-competitive practices | 2022 | UK-CMA | £4,320,000 |
| Alphabet Inc. and Google UK Ltd. and Google LLC | Alphabet Inc. | information technology | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Meta Platforms, Inc. and Tabby Acquisition Sub Inc. and Facebook UK Ltd. | Meta Platforms Inc. | information technology | price-fixing or anti-competitive practices | 2022 | UK-CMA | £1,500,000 |
| Focus Pharmaceuticals Limited and Focus Pharma Holdings Limited | Nordic Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2022 | UK-CMA | £549,343 |
| Lexon (UK) Limited and Lexon UK Holdings Limited | Bestway Healthcare | healthcare services | price-fixing or anti-competitive practices | 2022 | UK-CMA | £593,780 |
| Focus Pharmaceuticals Ltd. and Focus Pharma Holdings Ltd. and Mercury Pharma Group Ltd. | Nordic Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2022 | UK-CMA | £921,357 |
| Medreich plc and Medreich Ltd | Meiji Group | food products | price-fixing or anti-competitive practices | 2022 | UK-CMA | £1,167,554 |
| Focus Pharmaceuticals Limited and Mercury Pharma Group Ltd. and Cinven Partners LLP et al. | Nordic Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2022 | UK-CMA | £1,843,380 |
| Medreich plc and Medreich Ltd and Meiji Seika Pharma Co. Ltd and Meiji Holdings Co. Ltd. | Meiji Group | food products | price-fixing or anti-competitive practices | 2022 | UK-CMA | £3,452,446 |
| Cinven Capital Management (V) GP Ltd. and Cinven Partners LLP et al. | Cinven Group | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2022 | UK-CMA | £4,856,620 |
| Lexon (UK) Limited | Bestway Healthcare | healthcare services | price-fixing or anti-competitive practices | 2022 | UK-CMA | £6,706,220 |
| Focus Pharmaceuticals Limited and Mercury Pharma Group Ltd. and Concordia Investments (Jersey) Ltd. and Advanz Pharma Corp. Ltd. et al. | Nordic Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2022 | UK-CMA | £7,288,853 |
| Alliance Pharmaceuticals Limited and Alliance Pharma plc | Alliance Pharma PLC | pharmaceuticals | price-fixing or anti-competitive practices | 2022 | UK-CMA | £7,900,000 |
| 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 |
| JD Sports Fashion Plc | JD Sports Fashion | retailing | price-fixing or anti-competitive practices | 2022 | UK-CMA | £1,485,000 |
| 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 |
| Waitrose | John Lewis Partnership | retailing | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Pfizer Limited | Pfizer | pharmaceuticals | price-fixing or anti-competitive practices | 2022 | UK-CMA | £63,300,000 |
| 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 |
| 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 |
| 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 |
| 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 |
| Leicester City Football Club Limited | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £880,000 |
| JD Sports Fashion plc | JD Sports Fashion | retailing | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Asda Group Ltd | EG Group | retailing | price-fixing or anti-competitive practices | 2023 | UK-CMA | £30,000 |
| Copart, Inc.and CPRT LLP and Copart UK Limited | Copart Inc. | information services | price-fixing or anti-competitive practices | 2023 | UK-CMA | £25,000 |
| Cinven | Cinven Group | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2021 | UK-CMA | £37,100,000 |
| HGCapital | Hg Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2021 | UK-CMA | £6,200,000 |
| Auden Mckenzie and Actavis UK | Intas Pharmaceuticals Ltd. | pharmaceuticals | price-fixing or anti-competitive practices | 2023 | UK-CMA | £130,000,000 |
| Crosfill & Archer Claims Limited | | | privacy violation | 2021 | UK-FCA | £110,000 |
