| Kaiser ISW Assessments Ltd | Health & social care | 2024 |
| Kalayci Transport Logistics Ltd | Transport & logistics | 2019 |
| Kaliway Logistic Limited | Extraterritorial | 2021 |
| KAM Invest Ltd | Real estate | 2020 |
| Kam's Logistics Ltd | Transport & logistics | 2019 |
| Kamabe Group Ltd | Financial services | 2026 |
| Kaminski Locums Limited | Health & social care | 2015 |
| Kamp Procurement and Logistics Ltd | Construction | 2020 |
| Kamuzze Musoke & Company Limited | Transport & logistics | 2024 |
| Kanok Investments Limited | Real estate | 2025 |
| Kape HR Limited | Professional & scientific | 2012 |
| Kapra Developments Ltd | Construction | 2014 |
| Kara Prestige Trade Ltd | Wholesale & retail | 2025 |
| Karen Alexandra Beauty & Well-Being Ltd | Wholesale & retail | 2023 |
| Karibuni Group Limited | Hospitality | 2018 |
| Karl Jones Motorsport Limited | Education | 2017 |
| Karl Schmidt UK Limited | Transport & logistics | 1983 |
| Karnobat 20 Ltd | Transport & logistics | 2021 |
| Karoon - NY Ltd | Information & communication | 2013 |
| Karsons Pharma Limited | Wholesale & retail | 2005 |
| Katie Wakenshaw Ltd | Administrative & support | 2026 |
| Kays Healthcare Solutions Ltd | Administrative & support | 2020 |
| Kazzy Global Ltd | Wholesale & retail | 2011 |
| KB Abodes Ltd | Real estate | 2023 |
| KB Carpenter Ltd | Construction | 2019 |
| KB Interior Design Ltd | Professional & scientific | 2026 |
| KBM Vehicle Services Ltd | Wholesale & retail | 2017 |
| KCB Coffee Ltd | Wholesale & retail | 2024 |
| Kcecleans Ltd | Administrative & support | 2025 |
| Kcjz Properties Limited | Real estate | 2020 |
| KCO Care at Home Ltd | Health & social care | 2025 |
| KCW Contracting Limited | Construction | 2017 |
| KD Training Services Ltd | Education | 2025 |
| KDB Consultancy Ltd | Professional & scientific | 2018 |
| KDK Owolabi Limited | Health & social care | 2015 |
| Kdm.Mitchel Electrical Ltd | Construction | 2025 |
| Keanu Limited | Information & communication | 2022 |
| Keas Electrical Limited | Construction | 2015 |
| Keash Consultancy Limited | Professional & scientific | 2017 |
| Keazey Company Ltd | Information & communication | 2026 |
| Kebab Express (Chatham) Ltd | Hospitality | 2025 |
| Keen Recruiters Ltd | Administrative & support | 2026 |
| Keenwood Ltd | Construction | 2021 |
| Keet Consultant London Limited | Administrative & support | 2023 |
| Keithmason Commercials Limited | Wholesale & retail | 2023 |
| KEK Ltd | Wholesale & retail | 2025 |
| Kelleco Limited | Wholesale & retail | 2022 |
| Kelliher Electricals Limited | Extraterritorial | 2013 |
| Kellow Associates Limited | Information & communication | 2016 |
| Kelly Property Developers (Kent) Ltd | Construction | 2019 |
| Kemi a Care Ltd | Health & social care | 2025 |
| KEN Tea Company Limited | Wholesale & retail | 1955 |
| Kenden Parking LLP | | 2009 |
| Kenick Ltd | Construction | 2017 |
| Kenjo Property Solutions Ltd | Real estate | 2026 |
| Kenmor Home Improvements LLP | | 2026 |
| Kenny Grimwood Ltd | Wholesale & retail | 2024 |
| Kensom Property Development & Maintenance Ltd | Households | 2021 |
| Kent & Medway Trading Company Limited | Real estate | 2005 |
| Kent 4 Event Limited | Administrative & support | 2024 |
| Kent Aesthetics Limited | Health & social care | 2017 |
| Kent African Muslim Community | Other services | 2024 |
| Kent Air Solutions Limited | Energy | 2018 |
| Kent and Medway Calabash Brew Ltd | Manufacturing | 2024 |
| Kent Appliance World Limited | Other services | 2013 |
| Kent Barbers Walderslade Limited | Other services | 2020 |
| Kent Bathrooms UK Limited | Construction | 2003 |
| Kent Business Improvements Limited | Professional & scientific | 2014 |
| Kent Car Group Ltd | Administrative & support | 2022 |
| Kent Clinical Waste Limited | Water & waste | 2016 |
| Kent Commercial & Residential Cleaning Ltd | Administrative & support | 2019 |
| Kent County Surfacing Ltd | Construction | 2014 |
| Kent County Surfacing South East Limited | Construction | 2022 |
| Kent Demolition & Recycling Limited | Administrative & support | 2012 |
| Kent Demolition Company Limited | Construction | 2000 |
| Kent EAR Microsuction Ltd | Health & social care | 2022 |
| Kent Equine Hospital Limited | Professional & scientific | 2018 |
| Kent Events Ltd | Hospitality | 2023 |
| Kent Express Delivery Ltd | Transport & logistics | 2021 |
| Kent Family Learning Community Interest Company | Education | 2018 |
| Kent Fire Training Ltd | Professional & scientific | 2005 |
| Kent Fire, Cctv & Security Ltd | Professional & scientific | 2024 |
| Kent Fruit and VEG Ltd | Wholesale & retail | 2025 |
| Kent Garage Equipment Ltd | Manufacturing | 2016 |
| Kent GP Private Limited | Health & social care | 2018 |
| Kent Halal Meat and Grocers Ltd | Wholesale & retail | 2024 |
| Kent Heating & Cooling Ltd | Construction | 2022 |
| Kent Heritage Properties Ltd | Real estate | 2025 |
| Kent Hydraulic Hoses Limited | Administrative & support | 2012 |
| Kent Integrated Health Ltd | Health & social care | 2023 |
| Kent Land & Planning Ltd | Construction | 2017 |
| Kent Machines Limited | Administrative & support | 2021 |
| Kent Media Group Ltd | Other services | 2014 |
| Kent Medinvest Limited | Professional & scientific | 2022 |
| Kent Padel Club Ltd | Education | 2026 |
| Kent Painting Contractors Ltd | Construction | 2017 |
| Kent Press & Broadcast Awards Limited | Administrative & support | 2019 |
| Kent Property Hub Ltd | Real estate | 2017 |
| Kent Recycling Limited | Administrative & support | 2023 |
| Kent Security Systems Limited | Administrative & support | 2000 |