| Keen Cabling Group Ltd | Construction | 2023 |
| Keerthi Assets Ltd | Real estate | 2023 |
| KEF Construction Ltd | Construction | 2025 |
| Keith Askam Inspection Ltd | Professional & scientific | 2010 |
| Kembridge Support Services Limited | Health & social care | 2026 |
| Kemm Real Estate Limited | Real estate | 2026 |
| KEN Catmull Associates Limited | Administrative & support | 2001 |
| Kennyclassy Beauty Limited | Other services | 2024 |
| Kennymax Care Services Limited | Health & social care | 2025 |
| Kent & Ashford Homes Ltd | Real estate | 2025 |
| Kent & Medway Homes Ltd | Real estate | 2021 |
| Kent & Medway Property Company (Aukr) Limited | Real estate | 2025 |
| Kent Aesthetics and Beauty Limited | Other services | 2025 |
| Kent and Sussex Drink Solutions Ltd | Hospitality | 2014 |
| Kent and Sussex Electrical Engineering Limited | Manufacturing | 2021 |
| Kent and Sussex Events Ltd | Hospitality | 2018 |
| Kent Bello Ltd | Hospitality | 2026 |
| Kent Best Homes Ltd | Real estate | 2026 |
| Kent Brickwork Ltd | Construction | 2012 |
| Kent Building & Maintenance Limited | Construction | 2011 |
| Kent Business Sundries Limited | Wholesale & retail | 2007 |
| Kent Chef Limited | Hospitality | 2024 |
| Kent Cleaning Solutions Ltd | Administrative & support | 2010 |
| Kent Club Food Ltd | Hospitality | 2023 |
| Kent Coms Ltd | Transport & logistics | 2022 |
| Kent Counselling Services Ltd | Health & social care | 2025 |
| Kent County Access Ltd | Construction | 2016 |
| Kent Customs Ltd | Manufacturing | 2022 |
| Kent Dance Floors Ltd | Other services | 2016 |
| Kent Decor Limited | Construction | 2024 |
| Kent Digger and Groundworks Group Ltd | Construction | 2025 |
| Kent Distillers Limited | Extraterritorial | 2014 |
| Kent Electrical Services Ltd | Construction | 2025 |
| Kent Electrical Supplies Limited | Wholesale & retail | 1995 |
| Kent Electronic Services (KES) Limited | Information & communication | 2017 |
| Kent Elite GAS Services Ltd | Construction | 2011 |
| Kent Express Limited | Wholesale & retail | 1999 |
| Kent Ghana Association Ltd | Health & social care | 2018 |
| Kent Glazing Limited | Construction | 2010 |
| Kent Gloves Limited | Arts & recreation | 2016 |
| Kent Grapple Ltd | Arts & recreation | 2019 |
| Kent Hair and Beauty Products Limited | Wholesale & retail | 2017 |
| Kent Heating Limited | Construction | 2001 |
| Kent Holistic Consultancy Ltd | Education | 2022 |
| Kent Hvac Services Ltd | Construction | 2024 |
| Kent Kestrel Housing Limited | Households | 1982 |
| Kent Kinnections Ltd | Administrative & support | 2025 |
| Kent Mechanical Consultancy Ltd | Professional & scientific | 2025 |
| Kent Mortgage Services Ltd | Financial services | 2016 |
| Kent Plumbing Supplies Limited | Wholesale & retail | 2001 |
| Kent Potato Supplies Limited | Wholesale & retail | 2002 |
| Kent Prestige Cars Limited | Transport & logistics | 2019 |
| Kent Properties (UK) Limited | Real estate | 1999 |
| Kent Property Lettings Ltd | Real estate | 2021 |
| Kent Rentals Limited | Administrative & support | 1999 |
| Kent Scaffolding Solutions Ltd | Construction | 2024 |
| Kent Sewing Centre Ltd | Manufacturing | 2015 |
| Kent Supported Housing Ltd | Real estate | 2020 |
| Kent Tongue-Tie Professionals Ltd | Health & social care | 2024 |
| Kent Trade Frames Limited | Manufacturing | 2003 |
| Kent Wellbeing Hub CIC | Health & social care | 2020 |
| Kent's Fresh Produce Ltd | Wholesale & retail | 2022 |
| Kentech Solutions Limited | Information & communication | 2013 |
| Kentiko Supplies Ltd | Wholesale & retail | 2025 |
| Kentmascotpartyhire Ltd | Other services | 2021 |
| Kentwin Ltd | Construction | 2020 |
| Kernowfintech Ltd | Information & communication | 2022 |
| Kespave Group Ltd | Construction | 2026 |
| Kevannaz Services Ltd | Administrative & support | 2013 |
| Kevin Elliott Lift Services Limited | Manufacturing | 2013 |
| Kevin FOX Carpentry Ltd | Manufacturing | 2025 |
| Kevnice Ltd | Health & social care | 2021 |
| Kexing (Shandong) Special Steel Co., Ltd | Manufacturing | 2022 |
| Key in Charge Ltd | Households | 2017 |
| KEZST4RS Collectibles Ltd | Wholesale & retail | 2025 |
| KG Logistics Aberdeen Limited | Transport & logistics | 2024 |
| KH Electrical Group Ltd | Construction | 2026 |
| KH Investments Limited | Wholesale & retail | 2014 |
| Khanda Group Limited | Real estate | 2025 |
| KI Carpentry Limited | Construction | 2019 |
| Kieran Limited | Wholesale & retail | 2025 |
| Kift Plant and Tool Services Ltd | Other services | 2006 |
| Kikis Enterprise UK Ltd | Wholesale & retail | 2023 |
| Killick Cleaning & Maintenance Limited | Other services | 2015 |
| Kimber Construction Limited | Construction | 1986 |
| Kimberly Limited | Wholesale & retail | 1995 |
| Kingdom Electrical Ltd | Professional & scientific | 2017 |
| Kinglet Freehold Apartments Limited | Households | 2016 |
| Kinglet RTM Company Limited | Real estate | 2011 |
| Kingsbridge Education Group Ltd | Education | 2025 |
| Kingsbrook Homes Limited | Real estate | 2023 |
| Kingscroft Surveying Ltd | Professional & scientific | 2007 |
| Kingsdale Court Residents Association Limited | Households | 1989 |
| Kingsheath Construction Limited | Construction | 2018 |
| Kingsheath Developments Limited | Construction | 2021 |
| Kingsheath Investment Holdings Limited | Real estate | 2026 |
| Kingsheath Plant Limited | Construction | 2018 |
| Kingsmere Surfacing Limited | Construction | 2012 |
| Kingswood House RTM Company Limited | Households | 2013 |
| KIP Remix Ltd | Wholesale & retail | 2024 |