| Kent Seed Labs Limited | Agriculture & fishing | 2025 |
| Kent Services DL Ltd | Wholesale & retail | 2023 |
| Kent Site Supplies Ltd | Wholesale & retail | 2025 |
| Kent Smile Studio Ltd | Health & social care | 2023 |
| Kent Tax Ltd | Extraterritorial | 2012 |
| Kent Telecare Lifeline Solutions Ltd | Information & communication | 2016 |
| Kent Waste & Gardening Solutions Limited | Water & waste | 2025 |
| Kent Waste Bulk Collections Ltd | Water & waste | 2025 |
| Kent Waste Water Services Limited | Water & waste | 2020 |
| Kent Wholesaler Ltd | Administrative & support | 2026 |
| Kent Window Wizard Ltd | Construction | 2024 |
| Kent Worldwide Logistics Ltd | Transport & logistics | 2019 |
| Kent's Premium Domestic Appliances Limited | Manufacturing | 2021 |
| Kentish Building Services and Groundworks Ltd | Construction | 2015 |
| Kentish Cleaning and Property Services Limited | Administrative & support | 2011 |
| Kentish Critical Care Limited | Health & social care | 2019 |
| Kentish Real Estate Investment Ltd | Real estate | 2026 |
| Kentora Skin and Aesthetics Clinic Ltd | Health & social care | 2026 |
| Kentry Limited | Transport & logistics | 2025 |
| Kenzie Home Services Limited | Construction | 2020 |
| Kenzo Group Ltd | Hospitality | 2025 |
| Kertendo Ltd | Health & social care | 2023 |
| Kesorn Thai Spa and Massage Ltd | Health & social care | 2018 |
| Kestrel Home Improvements Ltd | Construction | 2017 |
| Ketts & KIN Ltd | Construction | 2025 |
| Kevad Ltd | Professional & scientific | 2012 |
| Kevin Autos Recovery Limited | Transport & logistics | 2020 |
| Kevin Haley Studio Ltd | Professional & scientific | 2023 |
| Kewoo Ltd | Other services | 2019 |
| Key to Host Ltd | Real estate | 2023 |
| Key Vista Properties Limited | Real estate | 2024 |
| Keyoto International Limited | Administrative & support | 2014 |
| Kfckay Ltd | Health & social care | 2012 |
| KFM Scaffolding Limited | Construction | 2026 |
| KG Builders Kent Ltd | Construction | 2019 |
| KG Energy Ltd | Wholesale & retail | 2014 |
| KH Mobile Service Limited | Wholesale & retail | 2026 |
| Khan and Sons Investments Ltd | Real estate | 2020 |
| Kharaud Capital Limited | Real estate | 2021 |
| Khera Solicitors Ltd | Professional & scientific | 2018 |
| KHS South East Ltd | Construction | 2025 |
| Khush 13 Limited | Real estate | 2024 |
| KI Khana Ltd | Hospitality | 2025 |
| KI People Limited | Health & social care | 2025 |
| Kiara 19 Ltd | Hospitality | 2025 |
| Kicc Conferences Limited | Wholesale & retail | 1999 |
| Kicc King's Praise Assembly | Other services | 2018 |
| Kicc Kingdom Harvest | Other services | 2018 |
| Kicc Limited | Other services | 2010 |
| Kicc National Forum - UK | Other services | 2010 |
| Kicc Praise Tabernacle | Other services | 2014 |
| Kicc the Lighthouse | Other services | 2012 |
| Kicc the Solution Centre | Extraterritorial | 2013 |
| Kicc TV Limited | Information & communication | 2006 |
| Kiddies & ME Care Root CIC | Health & social care | 2024 |
| Kiddies & ME Limited | Health & social care | 2023 |
| Kids Car Mods Ltd | Wholesale & retail | 2022 |
| Kiki Beauty Limited | Other services | 2018 |
| Kikifinal African Limited | Wholesale & retail | 2025 |
| Killick-Seal Services Ltd | Administrative & support | 2018 |
| KIM Davis Ltd | Other services | 2005 |
| KIM Shoes Ltd | Wholesale & retail | 2022 |
| Kincan Property Investment Limited | Real estate | 2018 |
| Kincy Company Ltd | Health & social care | 2021 |
| Kindred Comics Ltd | Information & communication | 2023 |
| Kindro Limited | Health & social care | 2021 |
| Kindsteps Ltd Ltd | Information & communication | 2025 |
| King's Church Medway | Other services | 2013 |
| Kingdom Principles Services Ltd | Health & social care | 2019 |
| Kingdom Pushh CIC | Hospitality | 2025 |
| KINGDOMWEALTHPROPERTIES25 Limited | Real estate | 2025 |
| Kingfisher Angling and Preservation Society | Arts & recreation | 1995 |
| Kings Kids Childcare & Tution Ltd | Education | 2021 |
| Kingsley Books Services Ltd | Other services | 2019 |
| Kingsley Smith Solicitors LLP | | 2003 |
| Kingston Homes Limited | Construction | 2003 |
| Kingston Technical Services Limited | Professional & scientific | 2022 |
| Kingsway International Christian Centre | Other services | 2004 |
| Kingsway Tuition Ltd | Education | 2024 |
| Kinnon Properties Ltd | Real estate | 2024 |
| Kirtlands Healthcare Limited | Education | 2025 |
| KIS Property Services Ltd | Construction | 2013 |
| KISMET13 Limited | Real estate | 2024 |
| Kisumen Care Services Ltd | Health & social care | 2023 |
| KIT Media Ltd | Administrative & support | 2017 |
| Kjaer Global Limited | Professional & scientific | 2000 |
| KJC Integrated Solutions Ltd | Information & communication | 2019 |
| KJJ Property Ltd | Real estate | 2026 |
| KJN Homes Ltd | Real estate | 2023 |
| KJT Electrical Ltd | Manufacturing | 2023 |
| Kkik Ltd | Wholesale & retail | 2021 |
| Klair Group Ltd | Construction | 2019 |
| KLD the AG3NCY Ltd | Administrative & support | 2025 |
| KM Infrastructure Limited | Administrative & support | 2026 |
| KMK Creations Ltd | Other services | 2018 |
| Kmpp Property Ltd | Real estate | 2024 |
| KMR Strategic Investments Ltd | Financial services | 2025 |
| KMS Resolute Ltd | Administrative & support | 2022 |
| Knaphill Charcoal Grill Limited | Hospitality | 2015 |
| Knapp Services Limited | Construction | 2015 |