| JR Therapy Ltd | Extraterritorial | 2024 |
| JRD (Kent) Services Ltd | Administrative & support | 2019 |
| Jrlt Telecoms Ltd | Construction | 2025 |
| JSC Aircon Services Ltd | Energy | 2018 |
| JSW Resourcing Services Limited | Construction | 2017 |
| JTH Transport Invest Ltd | Professional & scientific | 2022 |
| JTH Transport Ltd | Extraterritorial | 2022 |
| JTS Consultants Limited | Professional & scientific | 2022 |
| JTS Orthopaedic Consultancy Limited | Health & social care | 2016 |
| Just Impact Advisors | | 2025 |
| Just the JOB Ltd | Wholesale & retail | 2014 |
| Jute Fields Management Company Limited | Households | 2021 |
| JY Prima Ltd | Health & social care | 2025 |
| K Campion Holdings Limited | Financial services | 2024 |
| K Easy Services Invest Ltd | Extraterritorial | 2023 |
| K Easy Services Ltd | Extraterritorial | 2023 |
| K I Elkins Plumbing and Heating Ltd | Construction | 2022 |
| K Mcclellan Consulting Limited | Professional & scientific | 2017 |
| K RIX Contractors Limited | Construction | 2015 |
| K Williams and Co Accountants Limited | Professional & scientific | 2014 |
| K9 Clips Limited | Other services | 2026 |
| KA Consulting Invest Ltd | Professional & scientific | 2022 |
| Kader Kebab Ltd | Hospitality | 2024 |
| Kaizen Edge Int'L Ltd | Administrative & support | 2025 |
| Kanan Farm Ltd | Financial services | 2026 |
| KARE2 Limited | Wholesale & retail | 2019 |
| Karshee Retail Ltd | Wholesale & retail | 2026 |
| Kasthamandap Group Ltd | Hospitality | 2025 |
| Katleigh Construction Ltd | Professional & scientific | 2009 |
| Kaveenaa Ltd | Wholesale & retail | 2024 |
| KBH Fitness Ltd | Arts & recreation | 2025 |
| KBR Landscaping Ltd | Administrative & support | 2026 |
| KCA Global (UK) Limited | Information & communication | 2007 |
| KDY Properties Ltd | Real estate | 2023 |
| Kearsney Construction Ltd | Construction | 2024 |
| Kearsney Court Management Limited | Households | 2010 |
| Kehily Ltd | Professional & scientific | 2018 |
| Kempshott Road NO 50 Limited | Households | 2005 |
| Kensington Place Nominees (NO 2) Limited | Real estate | 2007 |
| Kensington Place Nominees (NO. 1) Limited | Real estate | 2007 |
| Kent Artificial Turf Limited | Administrative & support | 2023 |
| Kent Cables Limited | Construction | 2017 |
| Kent Classic Car Holdings Ltd | Wholesale & retail | 2020 |
| Kent Coast Construction and Maintenance Ltd | Extraterritorial | 2024 |
| Kent Community Housing Hub CIC | Administrative & support | 2022 |
| Kent Dwellings Ltd | Construction | 2023 |
| Kent ICT Solutions Limited | Information & communication | 2004 |
| Kent Kebab House Ltd | Hospitality | 2025 |
| Kent Metro's Ltd | Hospitality | 2024 |
| Kent Music Events Ltd | Information & communication | 2024 |
| Kent Poetry CIC | Arts & recreation | 2023 |
| Kent Surveys and Engineering Ltd. | Construction | 2019 |
| Kentish Groundworks Ltd | Construction | 2019 |
| Kesman (E14) Limited | Other services | 2025 |
| Kesman Products (E14) Limited | Other services | 2025 |
| Keystone (Clanwilliam Road) Ltd | Construction | 2021 |
| Keystone Employment Group LLP | | 2007 |
| Keystone Employment Group NO.1 Limited | Information & communication | 2020 |
| Keystone House Limited | Administrative & support | 1962 |
| KH Hand Car Wash Limited | Administrative & support | 2025 |
| KID Ease Limited | Professional & scientific | 2000 |
| KIN25STORAGE Ltd | Real estate | 2022 |
| Kings Mews (Margate Kent) Flat Management Company NO.2 Limited | Households | 2007 |
| Kingsdale Residents Company Limited | Households | 1992 |
| Kingsnorth Keystone Project Solutions Ltd | Information & communication | 2025 |
| Kingston BI Ltd | Information & communication | 2019 |
| Kingstone One PLC | Extraterritorial | 2023 |
| Kitchen George (Dover) Limited | Wholesale & retail | 2006 |
| KJF Consulting Ltd | Administrative & support | 2021 |
| KL Decorating Services Ltd | Construction | 2025 |
| KM Accommodations Ltd | Hospitality | 2022 |
| KMC Commercials Limited | Wholesale & retail | 2019 |
| KMC Properties Limited | Households | 2004 |
| Kmgimaging Ltd | Health & social care | 2021 |
| KMS Financial Limited | Financial services | 2023 |
| Knight GAS Services Ltd | Construction | 2020 |
| Knockabout 007 Limited | Hospitality | 2026 |
| Knoll House Limited | Extraterritorial | 1996 |
| KOE Services Ltd | Information & communication | 2026 |
| KP Muthu Ltd | Wholesale & retail | 2025 |
| KR Apex Property Development Ltd | Real estate | 2026 |
| Kraken Motorcycle Company Limited | Administrative & support | 2022 |
| Kral Doner Ltd | Wholesale & retail | 2020 |
| KRI Group SE Limited | Construction | 2020 |
| KTB Technologies Limited | Information & communication | 2022 |
| KTR International Trading Co LP | | 2017 |
| Kukla Clothes Group Ltd | Wholesale & retail | 2023 |
| Kumtime Ltd | Wholesale & retail | 2022 |
| L & L Scaffolding Ltd | Construction | 2022 |
| L B Design Limited | Wholesale & retail | 2022 |
| L Buckle Construction Ltd | Construction | 2026 |
| L Horeca Invest Ltd | Extraterritorial | 2025 |
| L Horeca Ltd | Extraterritorial | 2025 |
| L&Y Emporium Ltd | Wholesale & retail | 2023 |
| L&Y Property Corp Ltd | Real estate | 2016 |
| L'Empreinte Invest Ltd | Extraterritorial | 2025 |
| L'Empreinte Ltd | Extraterritorial | 2025 |
| LA Friends Ltd | Hospitality | 2025 |
| LA Glycine Ltd | Professional & scientific | 2021 |
| LA Malice PLC | Extraterritorial | 2005 |