| Archstone Solicitors Ltd | | | legal services violation | 2023 | UK-SRA | £2,200 |
| Arcon Housing Association Limited | | | consumer protection violation | 2021 | UK-HOS | £250 |
| Arcon Housing Association Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| Argentum Data Solutions Ltd | | | privacy violation | 2023 | UK-ICO | £65,000 |
| Argos Limited | J Sainsbury PLC | retailing | consumer protection violation | 2021 | UK-CMA | £500,000 |
| Argos Limited | J Sainsbury PLC | retailing | consumer protection violation | 2012 | UK-OFT | £0 |
| Arhag Housing Association Limited | | | consumer protection violation | 2023 | UK-HOS | £1,200 |
| Arhag Housing Association Limited | | | consumer protection violation | 2022 | UK-HOS | £150 |
| Arhag Housing Association Limited | | | consumer protection violation | 2023 | UK-HOS | £2,600 |
| Ariana Television and Radio Network | | | telecommunications violation | 2017 | UK-OFCOM | £200,000 |
| Arlen Properties Ltd | | | consumer protection violation | 2022 | UK-RPT | £346 |
| Arlingtons LPM Limited | | | consumer protection violation | 2019 | UK-PRS | £0 |
| Arora Tech Ltd. | | | consumer protection violation | 2011 | UK-OFT | £9,576 |
| Ascend Estates Limited | | | consumer protection violation | 2021 | UK-RPT | £160 |
| Asda | EG Group | retailing | consumer protection violation | 2024 | UK-CMA | £0 |
| Ash-Shahada Housing Association Limited | | | consumer protection violation | 2021 | UK-RSH | £0 |
| Ashbourne Management Services Ltd. | | | consumer protection violation | 2011 | UK-OFT | £0 |
| Ashfords LLP | | | legal services violation | 2020 | UK-SRA | £17,550 |
| Ashley Wilson Solicitors LLP | | | legal services violation | 2023 | UK-SRA | £900 |
| Asia TV Ltd | | | telecommunications violation | 2015 | UK-OFCOM | £25,000 |
| ASOS | ASOS PLC | apparel | consumer protection violation | 2024 | UK-CMA | £0 |
| Aspers (Newcastle) Limited | | | gambling industry violation | 2013 | UK-GC | £40,000 |
| Aspers (Stratford City) Limited | | | gambling industry violation | 2020 | UK-GC | £730,733 |
| Aspire Housing | | | consumer protection violation | 2023 | UK-HOS | £200 |
| Aspire Housing Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| Aspire Housing Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| Aspire Housing Limited | | | consumer protection violation | 2022 | UK-HOS | £250 |
| Aspire Housing Limited | | | consumer protection violation | 2024 | UK-HOS | £3,450 |
| Assetgrove Prime Sales & Lettings Ltd | | | consumer protection violation | 2019 | UK-PRO | £0 |
| Assist Law Limited | | | privacy violation | 2016 | UK-ICO | £30,000 |
| Assured Estate Agents Ltd | | | consumer protection violation | 2022 | UK-PRO | £0 |
| Assured Letting & Estate Agents Limited (Assured NW Ltd) | | | consumer protection violation | 2022 | UK-PRS | £0 |
| AssuredEstateAgentsLimited | | | consumer protection violation | 2022 | UK-PRS | £0 |
| Assyrian Church of the East Relief Organization | | | charity violation | 2022 | UK-CCEW | £0 |
| Aster Group | Aster Group | miscellaneous services | consumer protection violation | 2023 | UK-HOS | £5,700 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2023 | UK-HOS | £1,250 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £100 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £100 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £150 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £150 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £150 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2023 | UK-HOS | £2,000 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £200 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £200 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £250 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £275 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £350 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £50 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £50 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £500 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £70 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £75 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2021 | UK-HOS | £750 |
| Aster Group Limited | Aster Group | miscellaneous services | consumer protection violation | 2022 | UK-HOS | £750 |
| Aston Estates (SK) Ltd | | | consumer protection violation | 2023 | UK-PRS | £0 |
| Aston Lettings Ltd | | | consumer protection violation | 2022 | UK-PRS | £0 |
| Astonbrook Housing Association Limited | | | charity violation | 2013 | UK-CCEW | £0 |
| Astro Residential Properties, Lettings and Management Ltd/Astro Lettings Ltd | | | consumer protection violation | 2023 | UK-PRS | £0 |
| AT Telecom Ltd | | | telecommunications violation | 2011 | UK-PSA | £50,000 |
| ATL Amusements and ATL Hire | | | gambling industry violation | 2010 | UK-GC | £0 |
| Atray Limited | | | legal services violation | 2022 | UK-SRA | £0 |
| Auckland Home Solutions CIC | | | consumer protection violation | 2021 | UK-RSH | £0 |
| Auckland Home Solutions CIC | | | consumer protection violation | 2023 | UK-RSH | £0 |
| Auden Group Lt | | | consumer protection violation | 2023 | UK-CMA | £0 |
| Audley Group Ltd | | | consumer protection violation | 2022 | UK-HOS | £150 |
| Audsley Moore | | | consumer protection violation | 2022 | UK-PRS | £0 |
| Aura Assets Management Limited | | | consumer protection violation | 2023 | UK-PRS | £0 |
| Ausaf UK Ltd | | | telecommunications violation | 2018 | UK-OFCOM | £0 |
| Austin Hayes property ltd | | | consumer protection violation | 2020 | UK-PRS | £0 |
| Auxesia Homes Limited | | | consumer protection violation | 2022 | UK-RSH | £0 |
| Avalon Direct Ltd | | | privacy violation | 2019 | UK-ICO | £80,000 |
| Aventus Law Limited | | | legal services violation | 2023 | UK-SRA | £0 |
| Avis Budget | Avis Budget Group | miscellaneous services | consumer protection violation | 2015 | UK-CMA | £0 |
| Aviva | Aviva PLC | financial services | insurance violation | 2017 | UK-CMA | £0 |
| AWH Legal Limited | | | legal services violation | 2020 | UK-SRA | £2,300 |
| AWT Sourcing Limited | | | consumer protection violation | 2023 | UK-PRS | £0 |
| Axiom Ince Limited | | | legal services violation | 2023 | UK-SRA | £0 |
| Axis Telecom Limited | | | consumer protection violation | 2012 | UK-OFCOM | £30,000 |
| B K Solicitors Ltd | | | legal services violation | 2022 | UK-SRA | £0 |
| Babbington Property Management Limited | | | consumer protection violation | 2023 | UK-PRS | £0 |
| Badarians Property Management | | | consumer protection violation | 2018 | UK-PRS | £0 |
| Bafona Ltd. | | | telecommunications violation | 2013 | UK-PSA | £25,000 |
| Baileys Solicitors Limited | | | legal services violation | 2024 | UK-SRA | £0 |
| Baily's Racing | | | gambling industry violation | 2019 | UK-GC | £5,000 |
| Ballymena Block Management Ltd | | | consumer protection violation | 2021 | UK-PRS | £0 |
| Baltic Media Alliance Limited | | | telecommunications violation | 2020 | UK-OFCOM | £20,000 |
| Banc Property Group | | | consumer protection violation | 2023 | UK-RPT | £400 |
| Bang Channels Ltd | | | telecommunications violation | 2010 | UK-OFCOM | £147,250 |
| Bang Media (London) Ltd | | | telecommunications violation | 2010 | UK-OFCOM | £10,000 |
| Bang Media (London) Ltd and Bang Channels Ltd | | | telecommunications violation | 2010 | UK-OFCOM | £0 |
| Bangla Indian Restaurant | | | consumer protection violation | 2015 | UK-ECNI | £1,250 |
| Bank of Ireland | Bank of Ireland | financial services | consumer protection violation | 2022 | UK-CMA | £0 |
| Bank of Ireland | Bank of Ireland | financial services | consumer protection violation | 2022 | UK-CMA | £0 |
| Bank of Ireland UK | Bank of Ireland | financial services | consumer protection violation | 2023 | UK-ICO | £0 |
| Bank of Scotland | Lloyds Banking Group | financial services | consumer protection violation | 2012 | UK-FSA | £4,200,000 |
| Bank of Scotland | Lloyds Banking Group | financial services | privacy violation | 2013 | UK-ICO | £75,000 |
| Bankruptcy Ltd. | | | consumer protection violation | 2011 | UK-OFT | £0 |
| Bankruptcy Protection Fund Ltd. and Consolidated Finance Ltd. and Alpha Mortgages Manchester Ltd. | | | consumer protection violation | 2010 | UK-OFT | £0 |
| Bannatyne's Fitness Limited | | | consumer protection violation | 2013 | UK-OFT | £0 |
| Banner Jones Limited | | | legal services violation | 2022 | UK-SRA | £300 |
| Barclays | Barclays | financial services | consumer protection violation | 2022 | UK-CMA | £0 |
