| 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 |
| Delta Gas and Power Limited | | | consumer protection violation | 2022 | UK-OFGEM | £530,809 |
| DePuy International Limited | Johnson & Johnson | pharmaceuticals | bribery | 2011 | UK-SFO | £4,829,000 |
| Deutsche Bank | Deutsche Bank | financial services | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Deutsche Bank AG | Deutsche Bank | financial services | interest rate benchmark manipulation | 2015 | UK-FCA | £226,800,000 |
| DFDS A/S | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Discount Mobility Plus Limited | | | price-fixing or anti-competitive practices | 2014 | 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 |
| Dollar East (International Travel & Money Transfer) Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-FCA | £3,600 |
| Dorenell Windfarm Limited | EDF-Electricite de France | utilities and power generation | energy market violation | 2024 | UK-OFGEM | £5,530,000 |
| Drax PowerLimited | Drax Group PLC | utilities and power generation | energy market violation | 2015 | UK-OFGEM | £25,000,000 |
| Drax Pumped Storage Limited | Drax Group PLC | utilities and power generation | energy market violation | 2023 | UK-OFGEM | £6,120,000 |
| DSM Demolition Ltd et al. | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £1,400,000 |
| Dyball Associates | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £20,000 |
| E (Gas and Electricity) Limited | | | consumer protection violation | 2020 | UK-OFGEM | £0 |
| E (Gas and Electricity) Ltd | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £650,000 |
| E.ON | E.ON | utilities and power generation | energy market violation | 2023 | UK-OFGEM | £1,720,000 |
| E.ON | E.ON | utilities and power generation | consumer protection violation | 2021 | UK-OFGEM | £682,351 |
| E.ON Energy Solutions Limited | E.ON | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| E.ON UK Plc and E.ON Energy Solutions Ltd. | E.ON | utilities and power generation | energy market violation | 2015 | UK-OFGEM | £7,000,000 |
| East Midlands International Airport Ltd | | | price-fixing or anti-competitive practices | 2016 | UK-CAA | £0 |
| Eastern Power Networks plc and South Eastern Power Networks plc | | | energy market violation | 2020 | UK-OFGEM | £1,500,000 |
| Economy Energy Trading Ltd | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £200,000 |
| EDF Energy | EDF-Electricite de France | utilities and power generation | consumer protection violation | 2020 | UK-OFGEM | £3,237 |
| EDF Energy | EDF-Electricite de France | utilities and power generation | energy market violation | 2018 | UK-OFGEM | £350,000 |
| EDF Energy (Thermal Generation) Limited | EDF-Electricite de France | utilities and power generation | energy market violation | 2020 | UK-OFGEM | £6,000,000 |
| EDF Energy Customers plc | EDF-Electricite de France | utilities and power generation | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| Education Software Solutions Limited | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £0 |
| Electricity North West Limited | | | price-fixing or anti-competitive practices | 2012 | UK-OFGEM | £0 |
| Electricity North West Limited | | | energy market violation | 2011 | UK-OFGEM | £100,000 |
| Elite Sports Group Limited and Elite Corporation Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £459,000 |
| Engie Global Markets | Engie | utilities and power generation | energy market manipulation | 2019 | UK-OFGEM | £2,128,236 |
| Entain plc | Entain PLC | entertainment | bribery | 2023 | UK-HMRC | £615,000,000 |
| Entice Energy | | | energy market violation | 2021 | UK-OFGEM | £20,000 |
| Enza Motors Limited and Enza Holdings Limited and Enza Group Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £347,198 |
| EP SHB Limited | | | energy market violation | 2023 | UK-OFGEM | £23,630,000 |
| EPEX Spot SE and EEX | | | price-fixing or anti-competitive practices | 2019 | UK-OFGEM | £0 |
| epyx Limited | | | price-fixing or anti-competitive practices | 2014 | UK-CMA | £0 |
| Erith Contractors Ltd and Erith Holdings Ltd | | | price-fixing or anti-competitive practices | 2023 | UK-CMA | £17,568,800 |
| ESB Independent Generation Trading Limited and Carrington Power Limited | | | energy market violation | 2021 | UK-OFGEM | £6,000,000 |
| Essential Pharma | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Experian Ltd | Experian | miscellaneous services | price-fixing or anti-competitive practices | 2011 | UK-OFT | £0 |
| Extra MSA Property (UK) Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| Facebook | Meta Platforms Inc. | information technology | price-fixing or anti-competitive practices | 2021 | UK-CMA | £50,500,000 |
| Faith Financial Solutions Ltd | | | consumer protection violation | 2021 | UK-FCA | £0 |
| Fender Musical Instruments Europe Limited | | | price-fixing or anti-competitive practices | 2019 | UK-CMA | £25,000 |
| Fender Musical Instruments Europe Ltd. and Fender Musical Instruments Corp. | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £4,531,185 |
| FH Bertling Ltd | | | bribery | 2019 | UK-SFO | £850,000 |
| Finteractive Limited (trading as FXVC) | | | investor protection violation | 2021 | UK-FCA | £0 |
| Flogas UK Limited | DCC PLC | business services | price-fixing or anti-competitive practices | 2012 | UK-OFT | £0 |
| Flynn Pharma Limited | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £6,704,422 |
| FM Model Agency Limited | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £251,000 |
| 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 |
| 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 |
| 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 |
| 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 |
| Footasylum | | | price-fixing or anti-competitive practices | 2022 | UK-CMA | £400,000 |
| FP McCann Limited | FP McCann Limited | construction and engineering | price-fixing or anti-competitive practices | 2020 | UK-CMA | £25,449,676 |
| Franklin Hodge Industries Ltd. and Carter Thermal Industries Ltd. | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £2,015,135 |
| Freightliner | Brookfield Corporation | diversified | price-fixing or anti-competitive practices | 2015 | UK-ORR | £0 |
| Fuel Express Ltd. and Fuel Express (Bagnalls) Ltd. and Carbo (UK) Ltd. and G.N. Grosvenor Ltd. | | | price-fixing or anti-competitive practices | 2018 | UK-CMA | £627,867 |
| 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 |
| Galglass Ltd. Irish Industrial Tanks Ltd. and Kernoff Ltd. | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £587,926 |
| Gary Berryman Estate Agents Ltd. and Warne Investments Ltd. | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £93,555 |
| GB eye Limited | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £0 |
| GBL Wheelchair Services Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £0 |
| GDF Suez/IPM | Engie | utilities and power generation | energy market violation | 2015 | UK-OFGEM | £450,000 |
| Generics (UK) Ltd and Merck KGaA | | | price-fixing or anti-competitive practices | 2016 | UK-CMA | £5,841,286 |
| GlaxoSmithKline plc and GlaxoSmithKline UK Ltd. and SmithKline Beecham Ltd. and Beecham Group plc | GlaxoSmithKline | pharmaceuticals | price-fixing or anti-competitive practices | 2016 | UK-CMA | £22,000,000 |
| Glencore Energy (UK) Ltd | Glencore | financial services | bribery | 2022 | UK-SFO | £0 |
| Glencore Energy (UK) Ltd | Glencore | financial services | bribery | 2022 | UK-SFO | £280,965,092 |
| Glyn Jackson Communications Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £35,700 |
| GNERGYLimited | | | energy market violation | 2019 | UK-OFGEM | £673,876 |
| Google | Alphabet Inc. | information technology | price-fixing or anti-competitive practices | 2022 | UK-CMA | £0 |
| GPT Special Project Management Ltd/Airbus | Airbus | aerospace and military contracting | bribery | 2021 | UK-SFO | £30,324,920 |
| Greenslade Taylor Hunt | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £170,549 |
| Guralp Systems Ltd | | | bribery | 2019 | UK-SFO | £2,069,861 |
| H&L Garages Limited | | | price-fixing or anti-competitive practices | 2013 | UK-OFT | £242,076 |
| H.J. Enthoven Limited and Eco-Bat Technologies Limited | | | price-fixing or anti-competitive practices | 2020 | UK-CMA | £8,076,504 |
| Hafiz Bros Travel & Money Transfer Limited | | | price-fixing or anti-competitive practices | 2023 | UK-FCA | £11,200 |
| Hamptons Estates Ltd. and Countrywide plc and Countrywide Group plc | | | price-fixing or anti-competitive practices | 2015 | UK-CMA | £582,455 |
| 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 |
| Hanson UK | HeidelbergCement | building materials | price-fixing or anti-competitive practices | 2020 | UK-CMA | £0 |
| Hartmond Limited | | | price-fixing or anti-competitive practices | 2014 | UK-OFT | £0 |
| Heathrow Airport Ltd. and Heathrow Airport Holdings Ltd. | Heathrow Airport Holdings | miscellaneous services | price-fixing or anti-competitive practices | 2018 | UK-CMA | £1,600,000 |
| Heathrow T5 Ltd. and Arora Holdings Ltd. | | | price-fixing or anti-competitive practices | 2018 | UK-CMA | £0 |
| HGCapital | Hg Capital | private equity (including portfolio companies) | price-fixing or anti-competitive practices | 2021 | UK-CMA | £6,200,000 |
| Hillside (UK Gaming) ENC | bet365 | entertainment | gambling industry violation | 2024 | UK-GC | £343,035 |
| Hillside (UK Sports) ENC | bet365 | entertainment | gambling industry violation | 2024 | UK-GC | £239,085 |
| Hoffman Thornwood Ltd. and Consolidated Timer Holdings Ltd. | | | price-fixing or anti-competitive practices | 2017 | UK-CMA | £625,000 |
| Hornsea 1 Limited | | | energy market violation | 2020 | UK-OFGEM | £4,500,000 |
| HSBC Bank plc | HSBC | financial services | foreign exchange market manipulation | 2014 | UK-FCA | £216,363,000 |
| Hudson Energy Supply UK Ltd | | | consumer protection violation | 2020 | UK-OFGEM | £750,000 |
| Hudson Energy Supply UK Ltd | | | consumer protection violation | 2018 | UK-OFGEM | £477,039 |
| Hudson Energy Supply UK Ltd. | | | consumer protection violation | 2019 | UK-OFGEM | £350,000 |
| ICAP Europe Ltd | TP ICAP PLC | financial services | interest rate benchmark manipulation | 2013 | UK-FCA | £14,000,000 |
| ICBC Standard Bank Plc | Industrial and Commercial Bank of China | financial services | bribery | 2015 | UK-SFO | £21,730,000 |
| ICC Intercertus Capital Ltd | | | investor protection violation | 2021 | UK-FCA | £0 |
| Innospec Ltd | Innospec | chemicals | bribery | 2010 | UK-SFO | £8,528,940 |
