| 1 Stop Realty | | | consumer protection violation | 2018 | UK-PRS | £0 |
| 10Bet Limited | | | gambling industry violation | 2014 | UK-GC | £0 |
| 1Invest Property Solutions | | | consumer protection violation | 2023 | UK-PRS | £0 |
| 1st Choice Properties (SRAL) Ltd | | | consumer protection violation | 2019 | UK-PRS | £0 |
| 1st Knight Military Charity | | | charity violation | 2018 | UK-CCEW | £0 |
| 1stChoiceForProperty | | | consumer protection violation | 2019 | UK-PRS | £0 |
| 1StopLettingShop | | | consumer protection violation | 2022 | UK-PRS | £0 |
| 2 Let Homes | | | consumer protection violation | 2023 | UK-PRS | £0 |
| 2communications Limited | | | telecommunications violation | 2012 | UK-PSA | £25,000 |
| 2communications Limited | | | telecommunications violation | 2012 | UK-PSA | £25,000 |
| 2Ergo Limited | | | telecommunications violation | 2011 | UK-PSA | £70,000 |
| 32Red Limited | | | gambling industry violation | 2018 | UK-GC | £2,024,046 |
| 32Red Limited | | | gambling industry violation | 2023 | UK-GC | £4,195,655 |
| 3CHA | | | consumer protection violation | 2022 | UK-HOS | £1,700 |
| 3CHA | | | consumer protection violation | 2021 | UK-RSH | £0 |
| 3XD Limited | | | consumer protection violation | 2023 | UK-CMA | £31,256 |
| 4Property | | | consumer protection violation | 2018 | UK-PRS | £0 |
| 888 UK Limited | 888 Holdings PLC | entertainment | gambling industry violation | 2017 | UK-GC | £7,824,023 |
| 888 UK Limited | 888 Holdings PLC | entertainment | gambling industry violation | 2022 | UK-GC | £9,409,756 |
| 965 TV Limited | | | telecommunications violation | 2022 | UK-OFCOM | £15,000 |
| A & A Star Estates Limited | | | consumer protection violation | 2018 | UK-PRO | £0 |
| A & S Leisure Group Limited | | | gambling industry violation | 2021 | UK-GC | £377,340 |
| A Casa Estate Agents Limited | | | consumer protection violation | 2021 | UK-PRS | £0 |
| A Share & Sons Limited dba SCS | | | consumer protection violation | 2014 | UK-OFT | £0 |
| A&M Lead Factory B.V. | | | telecommunications violation | 2013 | UK-PSA | £10,000 |
| A&T Legal Limited | | | legal services violation | 2023 | UK-SRA | £900 |
| A&T Legal Limited | | | legal services violation | 2024 | UK-SRA | £1,650 |
| A&T Legal Limited t/a Leaside Law | | | legal services violation | 2023 | UK-SRA | £2,600 |
| A-Z Law Solicitors Limited | | | legal services violation | 2023 | UK-SRA | £900 |
| A1 Agregator Limited | | | telecommunications violation | 2012 | UK-PSA | £50,000 |
| A1AM LTD | | | consumer protection violation | 2021 | UK-PRS | £0 |
| A2 Dominion Housing Group Limited | | | consumer protection violation | 2023 | UK-HOS | £1,950 |
| A2Dominion | | | consumer protection violation | 2022 | UK-HOS | £750 |
| A2Dominion Group | | | consumer protection violation | 2023 | UK-HOS | £5,700 |
| A2Dominion Group | | | consumer protection violation | 2023 | UK-HOS | £8,355 |
| A2dominion Housing Group | | | consumer protection violation | 2021 | UK-HOS | £1,020 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £100 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £120 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £120 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £125 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £150 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £150 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £150 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £150 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £200 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £200 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £200 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £200 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2020 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £250 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2023 | UK-HOS | £3,700 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £300 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £350 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2023 | UK-HOS | £4,600 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £410 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2023 | UK-HOS | £450 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £450 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £450 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £490 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £490 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £50 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £500 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £500 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £500 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £500 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £500 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2020 | UK-HOS | £625 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £630 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2021 | UK-HOS | £75 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £75 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £75 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £750 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2023 | UK-HOS | £880 |
| A2Dominion Housing Group Limited | | | consumer protection violation | 2022 | UK-HOS | £900 |
| A4E | | | privacy violation | 2010 | UK-ICO | £60,000 |
| AB Corporate LLP | | | legal services violation | 2021 | UK-SRA | £1,400 |
| Abacus Land 1 (HoldCo 1) Limited | | | consumer protection violation | 2024 | UK-CMA | £0 |
| Abbey Property Hampstead Ltd t/a Abbey Properties | | | consumer protection violation | 2019 | UK-PRO | £0 |
| Abbey Solicitors Limited | | | legal services violation | 2023 | UK-SRA | £900 |
| Abbeywood Accommodation Limited | | | consumer protection violation | 2022 | UK-PRS | £0 |
| Abby Lettings and Sales Ltd | | | consumer protection violation | 2018 | UK-PRO | £0 |
| Abensons Law Limited | | | legal services violation | 2024 | UK-SRA | £0 |
| Aberdein Considine & Company | | | legal services violation | 2023 | UK-SRA | £1,350 |
