| Kdph Ltd | Construction | 2018 |
| Kdro MAX Ltd | Education | 2024 |
| Kead Ltd | Administrative & support | 2021 |
| Keanen Global Limited | Real estate | 2016 |
| Keate Services (Croydon) Limited | Financial services | 2017 |
| Keaton Construx Ltd | Construction | 2025 |
| KEB Consultancy Limited | Real estate | 2011 |
| KEB Welfare Ltd | Financial services | 2025 |
| Kebabish Hub Limited | Hospitality | 2025 |
| Kedison Limited | Real estate | 2020 |
| Keejj Limited | Real estate | 2024 |
| Kehela Limited | Information & communication | 2006 |
| Keith Coulson & Co Ltd | Professional & scientific | 2003 |
| Kejjy Limited | Health & social care | 2019 |
| Kelerbay Limited | Transport & logistics | 1994 |
| Kellaw Property Ventures Ltd | Real estate | 2025 |
| Kelley & Lowe Limited | Professional & scientific | 2008 |
| Kelmscott Home Improvement Ltd | Construction | 2012 |
| Kemada Properties Limited | Real estate | 2024 |
| Kemkoy Limited | Health & social care | 2025 |
| KEN Douglas Limited | Financial services | 2012 |
| KEN Muir Limited | Wholesale & retail | 1999 |
| Kenard Engineering Company Limited | Manufacturing | 1964 |
| Kenard Group Limited | Professional & scientific | 2010 |
| Kench Construction Ltd | Construction | 2023 |
| Kench Group Ltd | Financial services | 2021 |
| Kench Regeneration Ltd | Professional & scientific | 2021 |
| Kenctech Limited | Information & communication | 2010 |
| Kenewdor Ltd | Wholesale & retail | 1999 |
| Kenlyn Properties Limited | Real estate | 2019 |
| Kennedy Steedman Ltd | Administrative & support | 2018 |
| Kennington Laundry (Ashford) Limited | Other services | 1944 |
| Kensal Community Clinic Ltd | Health & social care | 2012 |
| Kent BIO Energy Ltd | Other services | 2019 |
| Kent Boiler Repairs Ltd | Construction | 2022 |
| Kent Carers Services Ltd | Health & social care | 2021 |
| Kent Cars (ST) Limited | Transport & logistics | 2018 |
| Kent Cars Hire Ltd | Transport & logistics | 2023 |
| Kent Climate Control Ltd | Construction | 2025 |
| Kent Eco-Homes Limited | Construction | 2009 |
| Kent Equality Cohesion Council | Other services | 2010 |
| Kent Equine Facilitated Learning C.I.C. | Other services | 2018 |
| Kent Financial Services Ltd | Real estate | 2019 |
| Kent Fire Engineering Limited | Construction | 2018 |
| Kent Fire Extinguisher Services Ltd | Manufacturing | 2015 |
| Kent Fire Safety Ltd | Public administration | 2023 |
| Kent GUN Supplies Limited | Wholesale & retail | 2011 |
| Kent Hand Car Wash Ltd | Administrative & support | 2025 |
| Kent Holiday Lets Limited | Hospitality | 2021 |
| Kent Home Lifts Limited | Manufacturing | 2022 |
| Kent Learning Hubs Ltd | Education | 2025 |
| Kent Locks Limited | Other services | 2007 |
| Kent LS Ltd | Hospitality | 2025 |
| Kent M & E Contracts Limited | Other services | 1995 |
| Kent M & E Limited | Extraterritorial | 1997 |
| Kent Property Services Ltd | Real estate | 2024 |
| Kent Retail Ltd | Wholesale & retail | 2019 |
| Kent Solutions Timberframes Specialists Ltd | Manufacturing | 2017 |
| Kent Studios Limited | Information & communication | 2019 |
| Kent Suppliers Limited | Wholesale & retail | 2024 |
| Kent Tattoos Ltd | Other services | 2026 |
| Kent Traders Limited | Wholesale & retail | 2013 |
| Kent Turf,L Andscaping & Aggregates Ltd | Administrative & support | 2023 |
| Kent Tyres Ltd | Manufacturing | 2025 |
| Kent Ventures Limited | Real estate | 2024 |
| Kentec Electronics Limited | Manufacturing | 1985 |
| Kentish Interiors Ltd | Professional & scientific | 2023 |
| Kentish Property Developers Limited | Construction | 2020 |
| Kentleigh Developments Limited | Real estate | 2011 |
| Kenton Design and Technology Limited | Extraterritorial | 2014 |
| Kenton Group Employee Ownership Trustee Limited | Professional & scientific | 2022 |
| Kenton Optical and Fibre Technologies Ltd | Extraterritorial | 2016 |
| Kenton Research Limited | Financial services | 2007 |
| Kentos London Limited | Real estate | 2018 |
| Keogh Consultancy Ltd | Financial services | 2023 |
| Kepat Limited | Hospitality | 2007 |
| Kerlogue Woodhams Limited | Real estate | 2021 |
| Keshav Investments Limited | Real estate | 2025 |
| Kestas Motors Ltd | Wholesale & retail | 2025 |
| Keston Catering Services Ltd | Hospitality | 2017 |
| Kete Kitchens Ltd | Hospitality | 2026 |
| Key's Yours Ltd | Real estate | 2019 |
| Keyberry Limited | Transport & logistics | 2023 |
| Keylon Group Limited | Financial services | 2016 |
| Keylon Interiors Limited | Other services | 2014 |
| Keystone Brokerage Group Ltd | Real estate | 2025 |
| Keystrans Ltd | Wholesale & retail | 2018 |
| KF Property Maintenance Limited | Administrative & support | 2016 |
| KH Sports Park Ltd | Arts & recreation | 2026 |
| Khaira Storage Group Ltd | Transport & logistics | 2024 |
| Khaira Storage Ltd | Transport & logistics | 2024 |
| Kharvaan SAI Limited | Real estate | 2023 |
| Khatra Lifestyle Limited | Arts & recreation | 2019 |
| Khaya Housing CIC | Hospitality | 2024 |
| Khebang Limited | Real estate | 2024 |
| Khizi Limited | Households | 2016 |
| Kiara Trading Ltd | Real estate | 2024 |
| Kick HUT Ltd | Wholesale & retail | 2020 |
| Kickstart Success Ltd | Professional & scientific | 2017 |
| Kidation Limited | Information & communication | 2019 |