| Kayhan Healthcare Limited | Public administration | 2025 |
| Kayswift Express Ltd | Wholesale & retail | 2025 |
| Kayyala Limited | Administrative & support | 2018 |
| Kazs Logs Ltd | Agriculture & fishing | 2016 |
| KB Associates (Europe) Limited | Professional & scientific | 2010 |
| KBA Revenue Services Ltd | Public administration | 2019 |
| KBG Investment Properties Limited | Real estate | 2024 |
| KBM Management Ltd | Professional & scientific | 2023 |
| KBN Tilecraft Limited | Construction | 2022 |
| KC Care Ltd | Health & social care | 2017 |
| KC Control Systems Ltd | Manufacturing | 2013 |
| KC Imports Ltd | Wholesale & retail | 2022 |
| KC London Properties Limited | Real estate | 2017 |
| KC Prisma Ltd | Wholesale & retail | 2023 |
| KCC Construction Ltd | Construction | 2022 |
| Kccs Holdings Ltd | Financial services | 2022 |
| KCS Bargain Limited | Wholesale & retail | 2024 |
| KCS Food Ltd | Hospitality | 2024 |
| KCS Store Limited | Wholesale & retail | 2024 |
| KD Education Consultancy Ltd | Education | 2025 |
| Kdcr Limited | Wholesale & retail | 2025 |
| Kdic Limited | Health & social care | 2017 |
| KDP Housing Ltd | Real estate | 2023 |
| KE (Apartments) Ltd | Real estate | 2026 |
| KE (Commercials) Ltd | Real estate | 2026 |
| KE (HMO) Ltd | Real estate | 2026 |
| KE (Infrastructure) Ltd | Real estate | 2026 |
| KE (Residential) Ltd | Real estate | 2026 |
| Kebab City 80 Ltd | Hospitality | 2026 |
| Kebab on Trent Ltd | Hospitality | 2026 |
| Kebab Range Stoke Limited | Hospitality | 2025 |
| Kediss Ltd | Professional & scientific | 2012 |
| KEE Dancing Holidays Ltd | Education | 2011 |
| KEE Dancing Ltd | Education | 2010 |
| Keele EYE Centre Limited | Health & social care | 2013 |
| Keele Property Limited | Extraterritorial | 2011 |
| Keele Road Store Limited | Wholesale & retail | 2003 |
| Keeling Trading Limited | Wholesale & retail | 2026 |
| Keen Accountant Limited | Professional & scientific | 2008 |
| Keep Fit Nursery Stockton Ltd | Health & social care | 2021 |
| Keepsake Photography Ltd | Arts & recreation | 2018 |
| Keimanet Technologies Ltd | Information & communication | 2024 |
| Keinteriors Limited | Other services | 2019 |
| Keisakorp Ltd | Information & communication | 2021 |
| Keita High-Tech Repairs Ltd | Manufacturing | 2020 |
| Keith Pownall & Sons LLP | | 2014 |
| Kejan Mart Limited | Wholesale & retail | 2025 |
| Keklik & SON Limited | Wholesale & retail | 2013 |
| Keklik Ozkan Ltd | Real estate | 2025 |
| Kelbourne Homes Ltd | Construction | 2012 |
| Kelly Homes (Halmerend) Limited | Construction | 2019 |
| Kelly Homes (Stoke-On-Trent) Limited | Construction | 2017 |
| Kelly Molyneux & Co. Limited | Professional & scientific | 1988 |
| Kelm Care Limited | Health & social care | 2013 |
| Kelmarsh Show Ltd | Administrative & support | 2019 |
| Kelsall Holdings Limited | Financial services | 2020 |
| Kelvin Joseph Companies Ltd | Real estate | 2024 |
| Kemble Court Management Limited | Households | 2020 |
| Kempster & Kempster Ltd | Manufacturing | 2015 |
| Kemsakoms Medicals Ltd | Health & social care | 2024 |
| Kemsakoms Properties Ltd | Real estate | 2025 |
| Kennerley Howle Holdings Ltd | Real estate | 2019 |
| Kennerleys Limited | Agriculture & fishing | 2003 |
| Kent & Company (Twines) Limited | Manufacturing | 2019 |
| Kent Green Works Ltd | Real estate | 2025 |
| Kent Panisales Ltd | Health & social care | 2023 |
| Kents Group Limited | Wholesale & retail | 2017 |
| Keppel Retail Limited | Wholesale & retail | 2024 |
| Keramat Premium Foods Ltd | Agriculture & fishing | 2022 |
| Kerridge DRY Dock Limited | Hospitality | 2021 |
| Kerry Z Travel Ltd | Administrative & support | 2023 |
| Kestange Limited | Wholesale & retail | 2025 |
| Kevin Express Ltd | Transport & logistics | 2026 |
| Key Cleaning Solutions Limited | Other services | 2005 |
| Key Electrical Installations Ltd | Construction | 2020 |
| Key Elements Property Limited | Real estate | 2021 |
| Key Engineering Suppliers Limited | Professional & scientific | 2024 |
| Key Family Holdings Limited | Professional & scientific | 1988 |
| Key Retreats Limited | Real estate | 2024 |
| KEY2DREAM Ltd | Real estate | 2024 |
| Keyani Property Group Limited | Real estate | 2021 |
| Keyanis Kitchen Ltd | Hospitality | 2025 |
| Keyprice Limited | Hospitality | 1984 |
| Keys Independent Estate Agents Limited | Real estate | 2013 |
| KEYS2HOMES Limited | Real estate | 2025 |
| Keystoke Limited | Real estate | 2016 |
| Keystone Motors Stoke Limited | Wholesale & retail | 2025 |
| Keystone Ridge Consulting Ltd | Administrative & support | 2026 |
| KF Chinese Ltd | Hospitality | 2025 |
| KF Creative Group Ltd | Manufacturing | 2025 |
| Kf-Nosh Limited | Real estate | 2024 |
| KGB Property Limited | Real estate | 2019 |
| KGB Rentals Limited | Real estate | 2024 |
| KGC (UK) Limited | Hospitality | 2013 |
| KH FUN Factory Ltd | Arts & recreation | 2024 |
| Khairi Properties Ltd | Real estate | 2024 |
| Khan 1 Limited | Other services | 2024 |
| Khan 2 Limited | Other services | 2024 |
| Khan 3 Limited | Other services | 2024 |
| Khan 4 Limited | Other services | 2024 |