| Thames Water | Thames Water Utilities Ltd. | utilities and power generation | water services violation | 2023 | UK-DWI | £0 |
| United Utilities | United Utilities Group PLC | utilities and power generation | water services violation | 2023 | UK-DWI | £0 |
| Welsh Water | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | water services violation | 2024 | UK-OFWAT | £39,400,000 |
| Welsh Water | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | water services violation | 2024 | UK-OFWAT | £40,000,000 |
| Wessex Water | YTL Power International | utilities and power generation | water services violation | 2021 | UK-OFWAT | £0 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water services violation | 2020 | UK-OFWAT | £0 |
| Southern Water | Macquarie | financial services | water services violation | 2019 | UK-OFWAT | £126,000,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water services violation | 2018 | UK-OFWAT | £120,000,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water services violation | 2014 | UK-OFWAT | £7,000,000 |
| Thames Water | Thames Water Utilities Ltd. | utilities and power generation | water services violation | 2021 | UK-OFWAT | £11,000,000 |
| Yorkshire Water | Kelda Group | utilities and power generation | water services violation | 2022 | UK-OFWAT | £100,000,000 |
| Northumbrian Water | Northumbrian Water Limited | utilities and power generation | water services violation | 2022 | UK-OFWAT | £0 |
| Southern Water | Macquarie | financial services | water services violation | 2022 | UK-OFWAT | £0 |
| South West Water | Pennon Group PLC | utilities and power generation | water services violation | 2022 | UK-OFWAT | £0 |
| Thames Water | Thames Water Utilities Ltd. | utilities and power generation | water services violation | 2022 | UK-OFWAT | £0 |
| Welsh Water | Dwr Cymru Cyfyngedig (Welsh Water) | utilities and power generation | water services violation | 2022 | UK-OFWAT | £0 |
| Yorkshire Water | Kelda Group | utilities and power generation | water services violation | 2022 | UK-OFWAT | £0 |
| Electric Ireland | | | utility violation | 2020 | UK-NIAUR | £250,000 |
| Project Plug Ltd t/a Click Energy | | | utility violation | 2019 | UK-NIAUR | £228,541 |
| SSE Airtricity Gas Supply (NI) Limited and SSE Airtricity Energy Supply (NI) Limited | SSE PLC | utilities and power generation | utility violation | 2019 | UK-NIAUR | £450,000 |
| Project Plug Ltd t/a Click Energy | | | utility violation | 2018 | UK-NIAUR | £162,473 |
| SSE Airtricity Energy Supply Limited | SSE PLC | utilities and power generation | utility violation | 2017 | UK-NIAUR | £75,000 |
| Budget Energy Limited | | | utility violation | 2017 | UK-NIAUR | £145,000 |
| Gas Networks Ireland (UK) Limited | | | utility violation | 2016 | UK-NIAUR | £500,000 |
| E.On Next Energy Ltd | E.ON | utilities and power generation | utility violation | 2023 | UK-OFGEM | £5,000,000 |
| Islam Channel Ltd | | | telecommunications violation | 2023 | UK-OFCOM | £40,000 |
| BitChute Limited | | | telecommunications violation | 2023 | UK-OFCOM | £0 |
| SB7 Mobile Limited | | | telecommunications violation | 2023 | UK-PSA | £10,000 |
| GB News Ltd | | | telecommunications violation | 2023 | UK-OFCOM | £0 |
| GB News Ltd | | | telecommunications violation | 2023 | UK-OFCOM | £0 |
| ITV | | | telecommunications violation | 2020 | UK-OFCOM | £0 |
| Pinnacle Life Limited | | | telecommunications violation | 2024 | UK-ICO | £80,000 |
| Penny Appeal | | | telecommunications violation | 2024 | UK-ICO | £0 |
| GB News | | | telecommunications violation | 2024 | UK-OFCOM | £0 |
| Big City Radio CIC | | | telecommunications violation | 2024 | UK-OFCOM | £1,200 |
| BT Telecommunications plc | BT | telecommunications | telecommunications violation | 2024 | UK-OFCOM | £0 |
| GB News | | | telecommunications violation | 2024 | UK-OFCOM | £0 |
| Ampay Ltd | | | telecommunications violation | 2024 | UK-OFCOM | £0 |
| Visional Media Ltd. | | | telecommunications violation | 2024 | UK-OFCOM | £0 |
| Kiwi Leisure Ltd | | | telecommunications violation | 2023 | UK-OFCOM | £0 |
| Tapnet Ltd. | | | telecommunications violation | 2023 | UK-OFCOM | £0 |
| Telefonica UK Limited | VMED O2 UK Limited | telecommunications | telecommunications violation | 2019 | UK-OFCOM | £75,000 |
| Virgin Media Limited | VMED O2 UK Limited | telecommunications | telecommunications violation | 2019 | UK-OFCOM | £25,000 |
| MS3 Networks Limited | | | telecommunications violation | 2019 | UK-OFCOM | £2,000 |
| Vonage Limited | Ericsson | telecommunications | telecommunications violation | 2018 | UK-OFCOM | £24,500 |
| British Telecommunications plc | BT | telecommunications | telecommunications violation | 2018 | UK-OFCOM | £70,000 |
| KCOM Group PLC | | | telecommunications violation | 2017 | UK-OFCOM | £900,000 |
| Hutchison 3G UK Ltd dba Three | CK Hutchison Holdings | diversified | telecommunications violation | 2017 | UK-OFCOM | £1,890,000 |
| Mobtech UG | | | telecommunications violation | 2021 | UK-PSA | £200,000 |
| BT Agilemedia | BT | telecommunications | telecommunications violation | 2021 | UK-PSA | £330,000 |
| Uplink IT Solutions | | | telecommunications violation | 2021 | UK-PSA | £250,000 |
| Globo Mobile Kommunikation UG | | | telecommunications violation | 2021 | UK-PSA | £750,000 |
| Webserve CMS | | | telecommunications violation | 2021 | UK-PSA | £135,000 |
| Entertainmob Kommunikation UG | | | telecommunications violation | 2021 | UK-PSA | £750,000 |
| New Level Ventures Ltd | | | telecommunications violation | 2021 | UK-PSA | £250,000 |
| TCS Combined Solutions Limited | | | telecommunications violation | 2021 | UK-PSA | £750,000 |
| Plus que PRO SAS | | | telecommunications violation | 2020 | UK-PSA | £250,000 |
| ECN Digital Ltd | | | telecommunications violation | 2020 | UK-PSA | £250,000 |
| Salvatet Inversiones SL | | | telecommunications violation | 2020 | UK-PSA | £1,000,000 |
| Irich Info Technology Ltd | | | telecommunications violation | 2020 | UK-PSA | £250,000 |
| Itech Logic Ltd | | | telecommunications violation | 2020 | UK-PSA | £250,000 |
| MobBill (UK) Ltd | | | telecommunications violation | 2020 | UK-PSA | £400,000 |
| Interact2media Pte Ltd | | | telecommunications violation | 2020 | UK-PSA | £50,000 |
| Unicate Ltd | | | telecommunications violation | 2020 | UK-PSA | £170,000 |
| Premier Ventures fka Umbrella Support Limited | | | telecommunications violation | 2019 | UK-PSA | £200,000 |
| IT Zone Limited | | | telecommunications violation | 2019 | UK-PSA | £250,000 |
| Prime Platform Solutions Ltd | | | telecommunications violation | 2019 | UK-PSA | £250,000 |
| Webdata Ltd | | | telecommunications violation | 2019 | UK-PSA | £250,000 |
| Veoo Ltd. | | | telecommunications violation | 2019 | UK-PSA | £600,000 |
| Net Real Solutions SL (Spain) | | | telecommunications violation | 2019 | UK-PSA | £200,000 |
| Madlenka Limited | | | telecommunications violation | 2019 | UK-PSA | £250,000 |
| Inter Inventory Company Limited | | | telecommunications violation | 2019 | UK-PSA | £375,000 |
| Halak Online Ltd | | | telecommunications violation | 2019 | UK-PSA | £250,000 |
| Global Awareness Ltd | | | telecommunications violation | 2019 | UK-PSA | £200,000 |
| FlipCove Ltd | | | telecommunications violation | 2018 | UK-PSA | £250,000 |
| Heart Communications Limited | | | telecommunications violation | 2018 | UK-PSA | £165,000 |
| Xplosion Ltd | | | telecommunications violation | 2018 | UK-PSA | £440,000 |
| Xplosion Ltd | | | telecommunications violation | 2018 | UK-PSA | £350,000 |
| Xplosion Ltd | | | telecommunications violation | 2018 | UK-PSA | £250,000 |
| PowerTel Limited | | | telecommunications violation | 2018 | UK-PSA | £200,000 |
| Tobaji Limited | | | telecommunications violation | 2018 | UK-PSA | £700,000 |
| Halak Online Ltd | | | telecommunications violation | 2018 | UK-PSA | £200,000 |
| Pro Money Holdings Ltd | | | telecommunications violation | 2018 | UK-PSA | £50,000 |
| Call the 118113 Helpdesk Limited | | | telecommunications violation | 2018 | UK-PSA | £425,000 |
| Hub Group Limited (The) | | | telecommunications violation | 2018 | UK-PSA | £155,820 |
| Intrugo Ltd. | | | telecommunications violation | 2018 | UK-PSA | £175,000 |
| Global Awareness Ltd | | | telecommunications violation | 2017 | UK-PSA | £650,000 |
| Cellso Ltd | | | telecommunications violation | 2017 | UK-PSA | £250,000 |
| Golden Brand Inc | | | telecommunications violation | 2017 | UK-PSA | £100,000 |
| De Veritate Sumus Ltd | | | telecommunications violation | 2017 | UK-PSA | £850,000 |
| Mobigo Ltd | | | telecommunications violation | 2017 | UK-PSA | £250,000 |
| DK Call Ltd | | | telecommunications violation | 2017 | UK-PSA | £645,000 |
| Treasure Media Limited | | | telecommunications violation | 2017 | UK-PSA | £250,000 |
| Browser Games Limited | | | telecommunications violation | 2017 | UK-PSA | £200,000 |
| Syncronized Limited | | | telecommunications violation | 2017 | UK-PSA | £600,000 |
| Venture247 Limited | | | telecommunications violation | 2017 | UK-PSA | £350,000 |
| GameNation (UK) Ltd | | | telecommunications violation | 2017 | UK-PSA | £200,000 |
| TijaMobile Ltd | | | telecommunications violation | 2016 | UK-PSA | £500,000 |
| Marketbybrand Ltd | | | telecommunications violation | 2016 | UK-PSA | £400,000 |
| Skybytes Ltd | | | telecommunications violation | 2016 | UK-PSA | £135,000 |
| Digitaun Ltd | | | telecommunications violation | 2016 | UK-PSA | £280,000 |
