| Aberdein Considine & Company | | | legal services violation | 2023 | UK-SRA | £1,350 |
| Able Homes | | | consumer protection violation | 2021 | UK-PRS | £0 |
| Abri Group | | | consumer protection violation | 2023 | UK-HOS | £9,054 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £100 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £125 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £125 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £150 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £2,150 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £200 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £200 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £200 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £270 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £300 |
| Abri Group Limited | | | consumer protection violation | 2022 | UK-HOS | £350 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £4,466 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £4,588 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £450 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £500 |
| Abri Group Limited | | | consumer protection violation | 2023 | UK-HOS | £75 |
| Abri Group Limited | | | consumer protection violation | 2021 | UK-HOS | £850 |
| Abri Homes | | | consumer protection violation | 2021 | UK-HOS | £3,000 |
| Abu Dhabi Media Company PJSC | | | telecommunications violation | 2021 | UK-OFCOM | £125,000 |
| Accent Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Accent Group Limited | | | consumer protection violation | 2021 | UK-HOS | £250 |
| Accent Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| Accent Group Limited | | | consumer protection violation | 2021 | UK-HOS | £500 |
| Accent Group Limited | | | consumer protection violation | 2021 | UK-HOS | £650 |
| Accent Group Limited | | | consumer protection violation | 2021 | UK-HOS | £75 |
| Access London Ltd | | | consumer protection violation | 2022 | UK-PRS | £0 |
| AceRelocationsInternational LTD | | | consumer protection violation | 2021 | UK-PRS | £0 |
| Acetelecom | | | telecommunications violation | 2014 | UK-PSA | £60,000 |
| Achieving for Children | | | privacy violation | 2023 | UK-ICO | £0 |
| Achiezer | | | charity violation | 2022 | UK-CCEW | £0 |
| Achom and Partners | | | legal services violation | 2023 | UK-SRA | £4,100 |
| Acis Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Acis Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Acis Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| Acis Group Limited | | | consumer protection violation | 2021 | UK-HOS | £150 |
| Acis Group Limited | | | consumer protection violation | 2022 | UK-HOS | £150 |
| Acis Group Limited | | | consumer protection violation | 2022 | UK-HOS | £50 |
| Ackroyd Legal (London) LLP | | | legal services violation | 2021 | UK-SRA | £600 |
| Ackroyd Legal (London) LLP | | | legal services violation | 2021 | UK-SRA | £600 |
| Ackroyd Legal Limited | | | legal services violation | 2021 | UK-SRA | £1,350 |
| ACL Property Investment Ltd | | | consumer protection violation | 2022 | UK-GLA | £15,000 |
| Acorn Mobility Services Ltd. | | | consumer protection violation | 2012 | UK-OFT | £0 |
| ACT (Action for Community Transformation) | | | charity violation | 2021 | UK-CCEW | £0 |
| ACT Response Limited | | | privacy violation | 2018 | UK-ICO | £140,000 |
| Action Aid for Animals | | | charity violation | 2019 | UK-CCEW | £0 |
| Active London | | | consumer protection violation | 2017 | UK-PRS | £0 |
| Adam Community Association | | | charity violation | 2011 | UK-CCEW | £0 |
| Adam Solicitors Limited | | | legal services violation | 2020 | UK-SRA | £2,600 |
| Adamsons Law Limited | | | legal services violation | 2018 | UK-SDT | £6,000 |
| Adaptive Affinity Limited | | | consumer protection violation | 2011 | UK-OFT | £0 |
| Addison Global Limited dba Moplay | | | gambling industry violation | 2020 | UK-GC | £0 |
| Adil Catering Limited | | | consumer protection violation | 2022 | UK-GLA | £15,750 |
| Adriatic Land 3 Limited | | | consumer protection violation | 2024 | UK-CMA | £0 |
| Adriatic Land 3 Limited | | | consumer protection violation | 2022 | UK-CMA | £0 |
| Adriatic Land 3 Limited and Abacus Land 4 Limited | | | consumer protection violation | 2024 | UK-CMA | £0 |
| Adullam Homes Housing Association Limited | | | consumer protection violation | 2022 | UK-HOS | £200 |
| Advanced VoIP Solutions Limited | | | privacy violation | 2016 | UK-ICO | £180,000 |
| Advice Direct Limited | | | privacy violation | 2016 | UK-ICO | £20,000 |
| ADX Properties Limited | | | consumer protection violation | 2022 | UK-GLA | £10,000 |
| Aer Lingus Limited | International Airlines Group | airlines | consumer protection violation | 2015 | UK-CAA | £0 |
| Aer Lingus Limited | International Airlines Group | airlines | consumer protection violation | 2012 | UK-OFT | £0 |
| Aetna Insurance Company Limited | CVS Health | retailing | insurance violation | 2022 | UK-CMA | £0 |
| Affinity Estate Agents Ltd | | | consumer protection violation | 2018 | UK-PRS | £0 |
| Affinity Seven Law Solicitors Ltd | | | legal services violation | 2023 | UK-SRA | £900 |
| Affinity Water | Daiwater Investment Limited | utilities and power generation | consumer protection violation | 2023 | UK-OFWAT | £0 |
| Affordable Car Hire Limited | | | consumer protection violation | 2018 | UK-CMA | £0 |
| AFG Law Limited | | | legal services violation | 2022 | UK-SRA | £3,350 |
| Afghan Heroes | | | charity violation | 2021 | UK-CCEW | £0 |
| Afghan Poverty Relief | | | charity violation | 2021 | UK-CCEW | £0 |
| AFM Express Properties-UKLtd | | | consumer protection violation | 2019 | UK-PRS | £0 |
| AFMExpress Properties Ltd | | | consumer protection violation | 2018 | UK-PRS | £0 |
| African Community Welfare Association | | | charity violation | 2011 | UK-CCEW | £0 |
| African Cultural Media and Leisure Group | | | charity violation | 2011 | UK-CCEW | £0 |
| African Francophone Women's Forum | | | charity violation | 2011 | UK-CCEW | £0 |
| African Legal Advisory Services | | | immigration services violation | 2021 | UK-OISC | £0 |
| Afro Caribbean Millennium Centre | | | telecommunications violation | 2021 | UK-OFCOM | £2,000 |
| AFTER5SERVICES LTD | | | consumer protection violation | 2022 | UK-PRS | £0 |
| AG Communications Ltd. | | | anti-money-laundering deficiencies | 2022 | UK-GC | £237,600 |
| Agence de Marketing Applique dba Vital Beauty and Swiss Home Shopping | | | consumer protection violation | 2012 | UK-OFT | £0 |
| Agoda Company Pte. Ltd. | | | consumer protection violation | 2019 | UK-CMA | £0 |
| Ahlebait TV Networks | | | telecommunications violation | 2023 | UK-OFCOM | £10,000 |
| Aid and Peace Trust | | | charity violation | 2019 | UK-CCEW | £0 |
| Aid Convoy | | | charity violation | 2020 | UK-CCEW | £0 |
| AIG Smart Housing Ltd | | | consumer protection violation | 2023 | UK-PRS | £0 |
| Air India Limited | | | consumer protection violation | 2013 | UK-CAA | £0 |
| Airbnb Ireland UC | | | consumer protection violation | 2017 | UK-CMA | £0 |
| AKL Solicitors Ltd | | | legal services violation | 2021 | UK-SRA | £1,800 |
| Aktiv Kapital | | | consumer protection violation | 2010 | UK-OFT | £0 |
| Al Arabiya News Channel FZ-LLC | | | telecommunications violation | 2018 | UK-OFCOM | £120,000 |
| Al Ehya Digital Television Limited | | | telecommunications violation | 2013 | UK-OFCOM | £85,000 |
| Al Ehya Digital Television Limited | | | telecommunications violation | 2011 | UK-OFCOM | £75,000 |
| Al Mustakillah Television Limited | | | telecommunications violation | 2013 | UK-OFCOM | £25,000 |
