| Keenfolks UK Ltd | Professional & scientific | 2023 |
| Keith Truett Agronomy Ltd | Agriculture & fishing | 2017 |
| Kelform Limited | Construction | 2015 |
| Kelly Hayes Limited | Professional & scientific | 2014 |
| Kelpcrete Limited | Professional & scientific | 2026 |
| KEN Communication Ltd | Information & communication | 2024 |
| Kent & Sussex Recycling Limited | Wholesale & retail | 2014 |
| Kent Alpha Project CIC | Real estate | 2021 |
| Kent Auction Galleries Limited | Administrative & support | 2004 |
| Kent Auto Panels Limited | Wholesale & retail | 1960 |
| Kent Battle of Britain Museum Trust Limited | Arts & recreation | 1982 |
| Kent Business Services Limited | Other services | 1995 |
| Kent Clean Team Ltd | Administrative & support | 2022 |
| Kent CRM Solutions Ltd | Information & communication | 2025 |
| Kent Damp Ltd | Construction | 2022 |
| Kent Distributors Limited | Wholesale & retail | 2026 |
| Kent Dyslexia Ltd | Education | 2022 |
| Kent E Commerce Limited | Wholesale & retail | 2025 |
| Kent Engineering Consultancy Limited | Professional & scientific | 2026 |
| Kent Fine Art Ltd | Wholesale & retail | 2011 |
| Kent Fire Safe Ltd | Public administration | 2024 |
| Kent First Choice Real Estate Ltd | Administrative & support | 2024 |
| Kent GAS Ltd | Construction | 2016 |
| Kent GAS Renewables Ltd | Construction | 2021 |
| Kent General Trading Limited | Construction | 2024 |
| Kent Kabinets Ltd | Construction | 2023 |
| Kent Occupational Therapy Limited | Health & social care | 2011 |
| Kent PA Hire Limited | Administrative & support | 2017 |
| Kent Plumbing & Heating Ltd | Construction | 2020 |
| Kent Power Services Limited | Construction | 2025 |
| Kent Recovery Limited | Wholesale & retail | 2016 |
| Kent Recruitment Limited | Education | 2006 |
| Kent Restaurants Limited | Hospitality | 2018 |
| Kent School Photography Ltd | Professional & scientific | 2025 |
| Kent TEO Services Ltd | Professional & scientific | 2023 |
| Kent Trainers Limited | Administrative & support | 2006 |
| Kent Travel Solutions Ltd | Wholesale & retail | 2022 |
| Kent Woodpeckers Ltd | Water & waste | 2024 |
| Kent Works Ltd | Professional & scientific | 2024 |
| Kentweb Ltd | Information & communication | 2018 |
| Kenwood Property Limited | Real estate | 2014 |
| Kenworth CTM 1 Ltd | Real estate | 2021 |
| Kenworth CTM 2 Ltd | Real estate | 2021 |
| Kenworth CTM 3 Ltd | Real estate | 2021 |
| Kenworth CTM 4 Ltd | Real estate | 2021 |
| Kenworth Estates Ltd | Real estate | 2014 |
| KHW Events Limited | Professional & scientific | 2022 |
| Kiavi Limited | Wholesale & retail | 2010 |
| Kiddiwinx Limited | Education | 2014 |
| Kidz Planet Limited | Education | 2003 |
| Kingfisher Kent MAN Co Limited | Households | 2022 |
| Kings Avenue Ltd | Real estate | 2026 |
| Kings Customs Ltd | Manufacturing | 2025 |
| Kingsnorth Freehold Ltd | Households | 2020 |
| Kingston Labs Ltd | Information & communication | 2011 |
| KIP Films Limited | Information & communication | 2012 |
| Kiruththika Retail Ltd | Wholesale & retail | 2025 |
| Kiss Products Limited | Wholesale & retail | 1992 |
| Kitchen Solutions Kent Limited | Wholesale & retail | 2009 |
| KJ Page Services Limited | Construction | 2016 |
| KJ Shop Ltd | Wholesale & retail | 2026 |
| KJP Holdings London Limited | Real estate | 2020 |
| KK Power Construction Ltd | Construction | 2025 |
| KKS Grove Property Limited | Real estate | 2025 |
| KKS Grove Retail Limited | Wholesale & retail | 2020 |
| Klay Studios Ltd | Wholesale & retail | 2026 |
| Klip Films Limited | Information & communication | 2012 |
| KM Cash and Carry Limited | Wholesale & retail | 2023 |
| KM Horseboxes Limited | Manufacturing | 2017 |
| KMA Care Services Limited | Health & social care | 2024 |
| Kmbz Cleaning Solutions Limited | Administrative & support | 2025 |
| Knights Bay Limited | Professional & scientific | 2019 |
| Knights Bay Oryx Ltd | Mining & quarrying | 2022 |
| Knights Trading Limited | Financial services | 2026 |
| Knoll Court RTM Company Limited | Households | 2018 |
| Knotted Books Ltd | Information & communication | 2020 |
| Kobiela Properties Ltd | Real estate | 2019 |
| Kodah Music Limited | Education | 2019 |
| Kodoka Ltd | Information & communication | 2024 |
| Komwil Ltd | Construction | 2023 |
| Koplex Removers Ltd | Transport & logistics | 2013 |
| KP Groundworks and Building Ltd | Construction | 2020 |
| KPO Architecture Limited | Professional & scientific | 2023 |
| Kreddo Ltd | Education | 2026 |
| Krunch Studios Ltd | Information & communication | 2024 |
| KT12 Property Ltd | Real estate | 2026 |
| Kullaborne Travel Limited | Administrative & support | 2023 |
| Kumari PVT Ltd | Health & social care | 2019 |
| Kurti Corporations Ltd | Administrative & support | 2022 |
| KV Property Developers Ltd | Construction | 2018 |
| Kyriakoullis Konstantinou Limited | Extraterritorial | 2022 |
| L J Sackett Limited | Transport & logistics | 2008 |
| L K Engineering & Construction Ltd | Construction | 2018 |
| L T T Rail Limited | Professional & scientific | 2019 |
| L&N Beautiful Nails Ltd | Other services | 2022 |
| L.D.B Property (Folkestone) Limited | Manufacturing | 1971 |
| L.G. United Services Ltd | Education | 2015 |
| LA Crinu Ltd | Transport & logistics | 2016 |
| LA Petite GEM Ltd | Other services | 2024 |
| LA Treatment Rooms Limited | Other services | 2021 |