| Kazitula Limited dba Shafiques | | | tax violations | 2018 | UK-HMRC | £208,643 |
| Kaz Accountancy Services Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,500 |
| Kays Accountancy Services Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,516 |
| Kasika Ltd dba Kathmandu Valley Restaurant | | | tax violations | 2018 | UK-HMRC | £40,693 |
| Karwood Properties Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Karl Bennett & Co Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,100 |
| Karam Express | | | tax violations | 2018 | UK-HMRC | £309,707 |
| Karai Lounge | | | tax violations | 2022 | UK-HMRC | £21,094 |
| Kar World Limited | | | tax violations | 2016 | UK-HMRC | £50,216 |
| Kanopi Accounting Services Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,350 |
| Kang Discount Store | | | tax violations | 2019 | UK-HMRC | £16,097 |
| Kandaka Ltd MSB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,740 |
| Kamros Cash and Carry Limited | | | tax violations | 2021 | UK-HMRC | £2,133,329 |
| Kamas Property Group Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,100 |
| Kalmars Commercial Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,500 |
| Kafs Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,500 |
| KAD Transport | | | tax violations | 2023 | UK-HMRC | £38,891 |
| K2 Kebab & Grill Limited | | | tax violations | 2021 | UK-HMRC | £49,915 |
| K.P. Doherty & Co | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £1,000 |
| K.N. Shah & Co | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £1,143 |
| K Robinson Accountancy Services Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,088 |
| K M Business Solutions Limited | | | anti-money-laundering deficiencies | 2020 | UK-ICAEW | £1,000 |
| K M Business Solutions Limited | | | anti-money-laundering deficiencies | 2018 | UK-ICAEW | £13,430 |
| K G Electrical Supplies UK Ltd. | | | tax violations | 2015 | UK-HMRC | £34,469 |
| K A MOT & Repair Centre Ltd t/a K Amar MOT & Repair | | | tax violations | 2023 | UK-HMRC | £72,261 |
| K A Investment & Development Company Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,000 |
| Jutla Enterprises | | | tax violations | 2016 | UK-HMRC | £38,704 |
| JustSubs Limited franchise of Subway | | | tax violations | 2018 | UK-HMRC | £20,234 |
| Just-Knock Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,350 |
| Just Properties 4 U Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,500 |
| Just Heating Limited | | | tax violations | 2018 | UK-HMRC | £14,827 |
| Junny Ltd dba Lau's Buffet | | | tax violations | 2018 | UK-HMRC | £78,320 |
| Jumpin Sussex Ltd | | | tax violations | 2021 | UK-HMRC | £22,839 |
| Julius Baer International Limited | Julius Baer Group | financial services | investor protection violation | 2022 | UK-FCA | £18,022,500 |
| Julian Francis Logistics Ltd | | | tax violations | 2023 | UK-HMRC | £65,145 |
| JSP Accountants Limited | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £5,000 |
| JR Painting and Decorating | | | tax violations | 2023 | UK-HMRC | £19,886 |
| JPMorgan Chase Bank N.A. | JPMorgan Chase | financial services | investor protection violation | 2013 | UK-FCA | £137,610,000 |
| JPK Solutions Ltd | | | tax violations | 2018 | UK-HMRC | £16,634 |
| JP Accounts And Bookkeeping Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,450 |
| Joseph Meer Ltd | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £3,586 |
| Jones Motor Engineers and ABS Computers | | | tax violations | 2017 | UK-HMRC | £44,388 |
| Jones Boyd (Durham) Limited | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £1,000 |
| Jonah Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,500 |
| Jon Essam & Co Ltd | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £1,602 |
| Johnsons | | | tax violations | 2017 | UK-HMRC | £38,105 |
| Johnson Print Ltd | | | tax violations | 2022 | UK-HMRC | £27,355 |
| John Pye & Sons Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,500 |
| John Joseph Financial Services Limited | | | investor protection violation | 2015 | UK-FCA | £20,000 |
| John Buck Property Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,700 |
| John A Hyde & Co Limited | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £1,750 |
| Jofzaj Limited dba The Mogul | | | tax violations | 2016 | UK-HMRC | £28,434 |
| Joes Burgers Ltd fka Buba Joe’s | | | tax violations | 2024 | UK-HMRC | £30,606 |
| Joanna's Fish Bar | | | tax violations | 2018 | UK-HMRC | £29,550 |
| JMS Estate Agents Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,750 |
| JMJ and Associates Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,750 |
| JMB Investments Limited | | | tax violations | 2023 | UK-HMRC | £88,291 |
| JLT Specialty Limited | Marsh & McLennan | financial services | anti-money-laundering deficiencies | 2022 | UK-FCA | £7,881,700 |
| JKL (Wakefield) Ltd | | | tax violations | 2019 | UK-HMRC | £16,432,386 |
| JJB Sports plc | | | investor protection violation | 2011 | UK-FSA | £455,000 |
| JJ Accounts And Bookkeeping Services Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,750 |
| Jinks Aston Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £6,550 |
| Jimmers of Dunlop Limited | | | tax violations | 2022 | UK-HMRC | £45,817 |
| Jhinda Sher Gill Construction Ltd | | | tax violations | 2018 | UK-HMRC | £66,773 |
| JH Chen 33 Ltd dba Peking Garden | | | tax violations | 2020 | UK-HMRC | £15,915 |
| Jewellery Hub of London Ltd | | | anti-money-laundering deficiencies | 2019 | UK-HMRC | £500 |
| Jethwa Supermarkets Ltd franchise of Costcutter | | | tax violations | 2018 | UK-HMRC | £64,092 |
| Jess Wilder Fine Art AMP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,500 |
| Jess Simpson Ltd | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £6,300 |
| Jervis & Partners Limited | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £1,000 |
| Jenny Laurence Limited | | | tax violations | 2023 | UK-HMRC | £29,872 |
| Jennifer Lauren Gallery Limited AMP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,300 |
| Jenkinson Estates Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £14,500 |
| Jenics Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,800 |
| Jeffrey Ross Ltd. | | | anti-money-laundering deficiencies | 2014 | UK-OFT | £29,000 |
| Jeffrey Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £13,100 |
| Jedirect Corp | | | tax violations | 2021 | UK-HMRC | £3,740,541 |
| JDR Commercial Solutions NI Limited | | | tax violations | 2023 | UK-HMRC | £1,156,778 |
| JDM Metals | | | tax violations | 2022 | UK-HMRC | £19,865 |
| JDG Electrical Services | | | tax violations | 2019 | UK-HMRC | £20,073 |
| JCM Residential Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,700 |
| JBS Decorating & Maintenance Services | | | tax violations | 2017 | UK-HMRC | £33,919 |
| JBK Constructions Ltd | | | tax violations | 2024 | UK-HMRC | £3,319,617 |
| JB Foods (Yorkshire) Limited | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £0 |
| Jaymax Uniform Shop Ltd | | | tax violations | 2023 | UK-HMRC | £34,071 |
| Jasmine Thai Cuisine Ltd | | | tax violations | 2021 | UK-HMRC | £57,385 |
| Jark-1 Limited | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £0 |
| Janice Chissick Estates Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £11,696 |
| Jamie Warner Estate Agents LTD EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,500 |
| Jameson And Partners Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,470 |
| James Sharp and Company | | | investor protection violation | 2012 | UK-FSA | £49,000 |
| James Pye & Son Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,000 |
| James Hope Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,350 |
| James Ashley Commercial Property Consultants LLP EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,300 |
| James Anderson & Co Limited | | | accounting fraud or deficiencies | 2016 | UK-ICAS | £1,000 |
| James Alexander Estates Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,750 |
| Jamber Managment Limited | | | tax violations | 2022 | UK-HMRC | £96,093 |
| Jamber Construction Limited | | | tax violations | 2022 | UK-HMRC | £49,924 |
| Jain Europe Ltd | | | tax violations | 2017 | UK-HMRC | £13,879 |
| Jaflong Restaurant | | | tax violations | 2018 | UK-HMRC | £12,860 |
| Jaffer & Co | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £11,780 |
