| Justins Residents Association Limited | Extraterritorial | 2001 |
| JW Schools Limited | Education | 2026 |
| JW Tennis Limited | Education | 2016 |
| K & L Plastering & Rendering Limited | Construction | 2021 |
| K D French Properties Ltd | Real estate | 2025 |
| K Jones Consultancy Limited | Professional & scientific | 2024 |
| K Nails 22 Limited | Other services | 2026 |
| K P Groundworks & Demolition Ltd | Construction | 2016 |
| K Thuranya Mathy Ltd | Wholesale & retail | 2010 |
| K&K Properties (London) Ltd | Real estate | 2026 |
| Kagi Limited | Wholesale & retail | 2006 |
| Kaiwin Limited | Hospitality | 2021 |
| Kalasol Ltd | Wholesale & retail | 2025 |
| KAM MAN Food Limited | Wholesale & retail | 2026 |
| Kamkee Food Limited | Manufacturing | 2019 |
| Kandy Integrated Limited | Administrative & support | 2022 |
| Kankiler Ltd | Hospitality | 2020 |
| Karas Nails and Beauty Limited | Wholesale & retail | 2024 |
| Karfok Limited | Hospitality | 2019 |
| Karlbaker Limited | Other services | 2019 |
| Kasa Car Sale &Finance Limited | Wholesale & retail | 2024 |
| KAZ Pizza Ltd | Hospitality | 2025 |
| KE & Co Lettings Limited | Real estate | 2015 |
| Keepler Group Ltd | Wholesale & retail | 2022 |
| Kekova Gulets Ltd | Transport & logistics | 2024 |
| Kelly & Company Accountants Limited | Professional & scientific | 2010 |
| Kensington Intl Ltd | Wholesale & retail | 2014 |
| Kent Elms Services Ltd | Hospitality | 2018 |
| Keppels Brewery Limited | Wholesale & retail | 2016 |
| Keri Jarvis Limited | Education | 2018 |
| Kevyn Consult Ltd | Wholesale & retail | 2018 |
| Khan Food Centre Ltd | Wholesale & retail | 2022 |
| Khan Orthopaedics Ltd | Health & social care | 2013 |
| Khumotax Logistics Ltd | Transport & logistics | 2025 |
| Khuraim Traders Limited | Wholesale & retail | 2023 |
| Khyryl Consultants Limited | Professional & scientific | 2009 |
| Kiddie City Childminders Ltd | Health & social care | 2021 |
| Kieran Lucas Contractors Ltd. | Construction | 1996 |
| Kigger Limited | Hospitality | 2021 |
| Kinggs Property Management Limited | Real estate | 2012 |
| Kirbside Cleaning Limited | Administrative & support | 2021 |
| Kitchenbay Limited | Hospitality | 2025 |
| Kiya Consults Ltd | Information & communication | 2017 |
| Kizuri Beauty Parlour Ltd | Other services | 2025 |
| KJK Client Advisory Limited | Professional & scientific | 2026 |
| Kkwestcliff Shop Limited | Real estate | 2017 |
| Knight Gratrix Architects (KGA) LLP | | 2009 |
| KNK Commercials Ltd | Wholesale & retail | 2025 |
| Koch Cars Ltd | Other services | 2022 |
| Kontac Limited | Hospitality | 2015 |
| Koru Outdoors Ltd | Wholesale & retail | 2026 |
| Kothawira Limited | Health & social care | 2016 |
| Kraa Ltd | Professional & scientific | 2018 |
| Krishiv Convenience Store Limited | Wholesale & retail | 2025 |
| Krmc Fire Protection Ltd | Public administration | 2025 |
| Kronan Limited | Hospitality | 2015 |
| Kronus Accounting Ltd | Professional & scientific | 2025 |
| KS Choice Ltd | Wholesale & retail | 2026 |
| Kvik Infotel Private Limited | Information & communication | 2024 |
| KWK. Ltd. | Hospitality | 2001 |
| Kyle R. C. Perry Heating & Plumbing Ltd | Construction | 2016 |
| L & M Construction Solutions Ltd | Construction | 2019 |
| L & N Industries Ltd | Professional & scientific | 2024 |
| L&M Professionals Ltd | Other services | 2025 |
| LA Femme Chic Limited | Other services | 2016 |
| LA Wilson Group Ltd | Construction | 2023 |
| Labeaute Nails Ltd | Other services | 2026 |
| Lacalebase African Restaurants Limited | Hospitality | 2024 |
| LAH Accountancy & Book Keeping Services Ltd | Professional & scientific | 2018 |
| Lailan Store Ltd | Wholesale & retail | 2025 |
| Lakeside Realty Ltd | Real estate | 2025 |
| Lamar Express Ltd | Hospitality | 2024 |
| Lamesta Limited | Real estate | 2015 |
| Land of Thai Spa Ltd | Other services | 2024 |
| Langdale (UK) Limited | Hospitality | 2014 |
| Lanvenderway Limited | Hospitality | 2019 |
| Laralya Ltd | Wholesale & retail | 2023 |
| Larchwood Court Freehold Limited | Households | 2013 |
| Laser by Lucy Ltd | Other services | 2024 |
| Lashlita Limited | Other services | 2019 |
| Latif and Sons(Uk) Ltd | Administrative & support | 2021 |
| Laughing Fish Limited | Arts & recreation | 1998 |
| Lavikservices Limited | Information & communication | 2025 |
| Lawless Construction Ltd | Construction | 2022 |
| LB Pubs Limited | Hospitality | 2025 |
| Learn Great Management Ltd | Professional & scientific | 2022 |
| Leastone (Westcliff) Limited | Households | 2002 |
| LEE DON Productions Ltd | Information & communication | 2025 |
| Lees' RPE Testing Services Ltd | Wholesale & retail | 2022 |
| Leicester City Care Limited | Administrative & support | 2014 |
| Leicestershire County Care Limited | Health & social care | 2011 |
| Leigh HK Limited | Hospitality | 2026 |
| Leigh Southside Management Company Limited | Households | 2001 |
| Leighpark Chippy Limited | Hospitality | 2019 |
| Leitrim Lets Limited | Real estate | 2021 |
| Lekav Limited | Construction | 2025 |
| Lekters Limited | Construction | 2012 |
| Lella Tech Limited | Information & communication | 2008 |
| Lenhardt Bodycraft Coaching Ltd | Education | 2026 |
| Leoaqua Services Ltd | Real estate | 2012 |