| Kaeo Ltd | Professional & scientific | 2026 |
| Kava Surfaces Limited | Manufacturing | 2024 |
| KBP Properties Ltd | Households | 2012 |
| Kemsing Taxi Ltd | Transport & logistics | 2024 |
| Kent Digital Ltd | Information & communication | 2014 |
| Kent Domestic Burners Limited | Construction | 1982 |
| Kent Food Partnership CIC | Other services | 2026 |
| Kent Gardens Limited | Administrative & support | 2012 |
| Kent Heating Solutions Ltd | Energy | 2013 |
| Kestrel Haven Limited | Construction | 2025 |
| Kevin Woodhouse Design Limited | Arts & recreation | 2009 |
| Kewell Converters Limited | Manufacturing | 1971 |
| Kewell Holdings Limited | Financial services | 2024 |
| Kewell Properties Limited | Real estate | 2024 |
| Key Light Hire Ltd. | Administrative & support | 2001 |
| KGB Construction Ltd | Construction | 2016 |
| Kifelix Electrical Services Ltd | Construction | 2019 |
| Kilogo Solutions Limited | Hospitality | 2024 |
| Kindling Media Podcasts Limited | Information & communication | 2017 |
| Kingscote Joinery Limited | Manufacturing | 2000 |
| Kingswear Estates Limited | Professional & scientific | 2014 |
| Kinhold GMS Ltd | Real estate | 2025 |
| Kishi Care Ltd | Health & social care | 2011 |
| KM Creations Limited | Professional & scientific | 2009 |
| KMB Autos Limited | Wholesale & retail | 1995 |
| KN Tyres UK Limited | Wholesale & retail | 2025 |
| Knight Brothers Investments Limited | Professional & scientific | 1990 |
| Knight Kefford Limited | Real estate | 2010 |
| Knole Creative Ltd | Administrative & support | 2017 |
| KP Pharma Diagnostics Ltd | Manufacturing | 2023 |
| KP Pharma Exclusive Ltd | Other services | 2023 |
| KP Pharma Health Ltd | Wholesale & retail | 2023 |
| KPL Environmental Ltd | Construction | 2017 |
| KPM Construction Limited | Construction | 2001 |
| KR Aniseed Ltd | Hospitality | 2017 |
| Kraken EYE Ltd | Information & communication | 2026 |
| Kraken Konstruction Limited | Construction | 2017 |
| Krrish Anne Boleyn Management Limited | Households | 2023 |
| Krrish Bracknell Limited | Real estate | 2022 |
| Krrish Portfolio Cheam Investments Limited | Real estate | 2023 |
| Krrishna Ltd | Real estate | 2023 |
| Ktam Events Limited | Other services | 2025 |
| Ktam Merchandising Ltd | Wholesale & retail | 2024 |
| Ladyhaye International Pet Travel Limited | Administrative & support | 2001 |
| Lake View Property Rentals Limited | Real estate | 2024 |
| Lakshminiwas Limited | Real estate | 2021 |
| Landale Residents Association Ltd | Households | 2003 |
| Landcroft Court Management Limited | Real estate | 2002 |
| Laporte Holdings Limited | Households | 2023 |
| Larkins Brewery Limited | Manufacturing | 1986 |
| Last Chance Shops Limited | Administrative & support | 2007 |
| Latham Infrastructure Ltd | Hospitality | 2025 |
| Lazervision Limited | Professional & scientific | 2008 |
| Lazy COW Limited | Administrative & support | 2002 |
| LBB S.M.A.R.T Limited | Wholesale & retail | 2024 |
| LCS Cooling Limited | Energy | 2018 |
| Leaglojoy Limited | Wholesale & retail | 2024 |
| Leasecon Engineering Associates Limited | Real estate | 1970 |
| Lebrel Consulting Ltd | Professional & scientific | 2024 |
| Ledg Properties Limited | Real estate | 2021 |
| Legrys Edenbridge Ltd | Real estate | 2018 |
| Legrys Havelock Estates Ltd. | Agriculture & fishing | 2012 |
| Legrys Lettings Edenbridge Limited | Real estate | 2023 |
| Leppard Engineering Limited | Manufacturing | 2017 |
| Level Best Solutions Limited | Construction | 2000 |
| Leydens Court Management Company Limited | Real estate | 1994 |
| Leydens Farm Limited | Agriculture & fishing | 2014 |
| LGA Property Investments Ltd | Real estate | 2025 |
| Lifewit Limited | Wholesale & retail | 2021 |
| Lineup Polo Ltd | Information & communication | 2021 |
| Lingfield Lodge Limited | Administrative & support | 2013 |
| Little Big Investments Ltd | Financial services | 2022 |
| Little Big Properties Ltd | Real estate | 2022 |
| Little Big Tech Ltd | Information & communication | 2021 |
| Little Big Tech Voice and Data Ltd | Wholesale & retail | 2023 |
| Little Postlings Farm Limited | Real estate | 2020 |
| Little Witt Trading Company Limited | Agriculture & fishing | 2010 |
| LK Construct Ltd | Construction | 2025 |
| Lochem Services Limited | Health & social care | 2005 |
| Lockskinners Farm Ltd | Extraterritorial | 2023 |
| Lotec Solutions Ltd | Information & communication | 2021 |
| LOVE2TIP Limited | Wholesale & retail | 2021 |
| Lovebird Studios Limited | Professional & scientific | 2023 |
| Lovebuzz Productions Limited | Information & communication | 2012 |
| Lucilina Property Investment Ltd | Real estate | 2022 |
| Lupton Bell Investments Limited | Financial services | 2010 |
| LWB Recruitment Ltd | Administrative & support | 2026 |
| M & S Electrical Services Limited | Construction | 2016 |
| M Gibson Build Limited | Construction | 2013 |
| M&B Fabrications Ltd | Manufacturing | 2024 |
| M&S Thornton Limited | Hospitality | 2003 |
| M.A.R.S. Joinery Ltd. | Manufacturing | 2001 |
| Macron Limited | Professional & scientific | 1981 |
| Makeke Ltd | Wholesale & retail | 2020 |
| Malibi Investments Ltd | Other services | 2013 |
| MAN and MAN Management Limited | Real estate | 2025 |
| MAN and MAN Planning and Construction Compliance Limited | Professional & scientific | 2018 |
| Mandrake Services Ltd | Transport & logistics | 2025 |
| Manikyam Ltd | Professional & scientific | 2025 |
| Mapada Ltd | Other services | 2011 |