| KAF Properties Limited | Financial services | 2022 |
| Kaieteur Guyanese Cuisine Limited | Hospitality | 2016 |
| Kalibar UK Ltd. | Information & communication | 2017 |
| KAR Services (South East) Limited | Wholesale & retail | 2005 |
| Karefree Homes Limited | | 1984 |
| Karen Jewell Racing Ltd | Arts & recreation | 2025 |
| Kari & Co. Properties Limited | Real estate | 2025 |
| Karla Service Ltd | Transport & logistics | 2025 |
| Karmasec Events Ltd | Education | 2018 |
| Karolek Limited | Transport & logistics | 2025 |
| KAS Aviation Limited | Transport & logistics | 2023 |
| Kasnae Property Ltd | Real estate | 2021 |
| Kathton House Group Ltd | Professional & scientific | 2021 |
| Kavlakov Ltd | Transport & logistics | 2024 |
| Kaxtn Ltd | Wholesale & retail | 2022 |
| Kaycloud Technologies Limited | Transport & logistics | 2023 |
| Kayleigh Carina Performing Arts School Limited | Arts & recreation | 2016 |
| Kayo Digital Holdings Limited | Financial services | 2025 |
| Kayo Digital Limited | Information & communication | 2010 |
| KB Transport Solutions Limited Limited | Wholesale & retail | 2015 |
| KBD Legal Consultancy Ltd | Professional & scientific | 2016 |
| Kbls Property Limited | Financial services | 2026 |
| KC Nurseries Ltd | Education | 2025 |
| Ke-Tech Ltd | Information & communication | 2024 |
| KEC Financial Limited | Information & communication | 2013 |
| Kedoo Optical Limited | Health & social care | 2013 |
| Keeperz Ltd | Arts & recreation | 2025 |
| Keeping IT Moving Logistics (KML) Ltd | Transport & logistics | 2025 |
| Keesha Tech Solutions Ltd | Information & communication | 2024 |
| Kelliworks Limited | Professional & scientific | 2025 |
| Kemjames Limited | Health & social care | 2024 |
| Kempson Road Management Limited | Real estate | 2001 |
| Kemsley Moon Limited | Agriculture & fishing | 2023 |
| Kemsley Village Store Limited | Wholesale & retail | 2018 |
| Kench Trading Ltd | Wholesale & retail | 2024 |
| Kenseikai Ltd | Construction | 2026 |
| Kensington & Sons Ltd | Real estate | 2025 |
| Kent Air Conditioning Co Limited | Construction | 2011 |
| Kent and Medway Mobile Waste Disposal and Collection Services Ltd | Water & waste | 2023 |
| Kent and Sussex Truck Centre Limited | Wholesale & retail | 1928 |
| Kent and Vale Ltd | Manufacturing | 2026 |
| Kent Auto Salvage Limited | Wholesale & retail | 1999 |
| Kent BUS Driver Training Ltd | Education | 2023 |
| Kent Business School Limited | Education | 2025 |
| Kent Camper Conversions Limited | Wholesale & retail | 2025 |
| Kent Camper Hire Limited | Administrative & support | 2025 |
| Kent Car and Commercial Ltd | Wholesale & retail | 2025 |
| Kent Care Ltd | Health & social care | 2023 |
| Kent Carpentry and Bathrooms Limited | Construction | 2021 |
| Kent Charcoal Grill Ltd | Extraterritorial | 2019 |
| Kent Complete Cleaning Ltd | Administrative & support | 2025 |
| Kent Complete Clearances Ltd | Water & waste | 2025 |
| Kent Complete Construction Ltd | Construction | 2025 |
| Kent Concrete Solutions Limited | Construction | 2024 |
| Kent County Paving Ltd | Construction | 2016 |
| Kent Dent Repair Limited | Wholesale & retail | 2019 |
| Kent Door Services Limited | Construction | 2015 |
| Kent Extensions & Garden Rooms Ltd | Manufacturing | 2018 |
| Kent Family Mediation Service | Other services | 2001 |
| Kent Fire Sprinklers Ltd | Extraterritorial | 2019 |
| Kent Flowers Limited | Transport & logistics | 1983 |
| Kent GAS Heating & Plumbing Ltd | Construction | 2016 |
| Kent GAS Heating Limited | Construction | 2017 |
| Kent Haul Ltd | Transport & logistics | 2025 |
| Kent Home Improvements (Swale) Limited | Manufacturing | 1969 |
| Kent Insurance Services Ltd | Financial services | 2017 |
| Kent Logistics Ltd | Transport & logistics | 2019 |
| Kent Masonic Property Company Limited | Real estate | 1983 |
| Kent Movers Ltd | Transport & logistics | 2014 |
| Kent Muslim Education Centre | Education | 2023 |
| Kent OIL Tanks Limited | Construction | 2026 |
| Kent Plant and Machinery Limited | Administrative & support | 2022 |
| Kent Plant Hire Sittingbourne Limited | Administrative & support | 2022 |
| Kent Pottery Ltd | Arts & recreation | 2026 |
| Kent Rail & Civil Engineering Ltd | Construction | 2018 |
| Kent SEN Trust | Education | 2014 |
| Kent Service and Maintenance Limited | Administrative & support | 2018 |
| Kent Software Limited | Financial services | 2020 |
| Kent Utilities and Civil Engineering Ltd | Construction | 2024 |
| Kentech Property Solutions Limited | Construction | 2009 |
| Kentish Facilities Management Ltd | Administrative & support | 2024 |
| Kentish Preserves Ltd | Extraterritorial | 2013 |
| Kerlac Systems Ltd | Administrative & support | 2017 |
| Kesman Solutions Limited | Health & social care | 2018 |
| KEV & Co Properties Limited | Real estate | 2023 |
| Kevin Granger Limited | Administrative & support | 2014 |
| Kevoak Capital Ltd | Financial services | 2022 |
| Key Street Car Wash Ltd | Administrative & support | 2021 |
| Kgndada Limited | Transport & logistics | 2026 |
| KHF Holding Limited | Construction | 2025 |
| Khrom Ltd | Transport & logistics | 2020 |
| Kiara 18 Ltd | Hospitality | 2021 |
| Kick Start Football Limited | Arts & recreation | 2014 |
| Kilidoc Limited | Health & social care | 2013 |
| Kilidoc Properties SPV Ltd | Real estate | 2025 |
| Kindra Moments Ltd | Wholesale & retail | 2025 |
| Kingman Consultancy Ltd | Professional & scientific | 2011 |
| Kings Hill (Maidstone) Limited | Professional & scientific | 2004 |
| Kings Hill Veterinary Clinic Limited | Professional & scientific | 2013 |
| Kingsdown Point (Tankerton) Limited | Households | 2008 |