| Kingpin Building Services Ltd | Construction | 2024 |
| Kingpin Construction Ltd | Construction | 2024 |
| Kingshurst Consulting Limited | Professional & scientific | 2019 |
| Kingsleighs Equine Education Centre Ltd | Education | 2020 |
| Kingsley Lets Limited | Real estate | 2021 |
| Kingston Flooring Limited | Wholesale & retail | 2025 |
| Kingston Hill Clinic Ltd | Health & social care | 2016 |
| Kingston James Developments Limited | Construction | 2024 |
| Kingsway Build Ltd | Construction | 2010 |
| Kingsway Caterers Ltd | Hospitality | 2019 |
| Kingsway Property Development Limited | Construction | 2017 |
| Kinnersley Engineering Limited | Manufacturing | 1979 |
| Kinnersley Racing Limited | Arts & recreation | 2010 |
| Kirelius Consulting Ltd | Professional & scientific | 2019 |
| Kirk Layton Roofing Limited | Construction | 2026 |
| Kirkwood Software Limited | Professional & scientific | 2024 |
| Kitchens by YOU Installation Services Ltd | Construction | 2019 |
| Kitchens by YOU Ltd | Manufacturing | 2019 |
| KJ Physio Ltd | Other services | 2018 |
| KJB Commercial Limited | Real estate | 2020 |
| KJB Management Real Estate Limited | Real estate | 2024 |
| KJB Residential Real Estate Limited | Real estate | 2024 |
| KJM Heating Services Limited | Manufacturing | 2011 |
| KK Civil Engineering Limited | Construction | 2019 |
| Kkcp Ltd | Construction | 2016 |
| KKZ Interiors Ltd | Construction | 2024 |
| KL Precision Tooling Ltd | Manufacturing | 2020 |
| KLC Financial Limited | Financial services | 2020 |
| KMS Payroll Services Limited | Professional & scientific | 2017 |
| Knapp END Farm Limited | Agriculture & fishing | 2014 |
| Kneg Ltd | Manufacturing | 2023 |
| Knifton Plumbing & Heating Ltd | Construction | 2020 |
| Knight & Cross Ltd | Households | 2019 |
| Knight Build (Worcester) Ltd | Construction | 2023 |
| Knight Chamberlain Ltd | Professional & scientific | 2012 |
| Knight Wood Build Ltd | Construction | 2024 |
| Knightbridge Properties Limited | Households | 2015 |
| Knights Management Services Ltd | Households | 2025 |
| Knights Travel Services Ltd | Transport & logistics | 2018 |
| Knightwick Management Company Limited | Other services | 1994 |
| Knot Your Average Ceremonies Ltd | Other services | 2024 |
| Knowhere Studio Limited | Wholesale & retail | 2025 |
| Kofour Limited | Other services | 2025 |
| Koios Group Limited | Information & communication | 2004 |
| Kokote Clothings Ltd | Wholesale & retail | 2024 |
| Kolkati Group Limited | Financial services | 2024 |
| Kolkati IP Limited | Financial services | 2025 |
| Kolkati Street Food Ltd | Hospitality | 2016 |
| Komakino Ltd | Other services | 2013 |
| Komoo Limited | Wholesale & retail | 2020 |
| KP Digital Agency Limited | Information & communication | 2025 |
| KP65 Services Limited | Professional & scientific | 2020 |
| KPL Care Ltd | Health & social care | 2023 |
| KR Services (Worcestershire) Ltd | Other services | 2018 |
| KRF MED Limited | Health & social care | 2023 |
| KRF Upton Ltd | Hospitality | 2025 |
| Krhl Group Limited | Manufacturing | 2023 |
| Krima Balance Ltd | Wholesale & retail | 2026 |
| KRO Companies Ltd | Wholesale & retail | 2025 |
| KRO Group Limited | Financial services | 2024 |
| KRR IT Consulting Limited | Information & communication | 2013 |
| Krumbskitchen Ltd | Wholesale & retail | 2026 |
| Krunk South Croydon Limited | Other services | 2020 |
| Krys Global (UK) Limited | Professional & scientific | 2015 |
| KSN Convenience Ltd | Wholesale & retail | 2024 |
| KSW Enterprises Limited | Arts & recreation | 2010 |
| Ktmb Limited | Manufacturing | 2010 |
| Kuji Drinks Ltd | Manufacturing | 2017 |
| Kupid Ltd | Information & communication | 2015 |
| Kuran Consults Limited | Health & social care | 2023 |
| Kurd Fade Studio Ltd | Other services | 2024 |
| Kuttanadancafe Limited | Hospitality | 2025 |
| Kv&Ka Transport Ltd | Transport & logistics | 2023 |
| KW Plumbing Services Limited | Construction | 2013 |
| KWH Consultants Limited | Professional & scientific | 2013 |
| KWJ Contractors Ltd | Information & communication | 2007 |
| KWM Solutions Limited | Professional & scientific | 2007 |
| KWS Consulting Limited | Professional & scientific | 2020 |
| Kyra | Education | 2002 |
| KZA Properties Ltd | Real estate | 2021 |
| L & J Accommodation Limited | Real estate | 2019 |
| L a Maintenance & Cleaning Limited | Construction | 2026 |
| L C Gheorghe Ltd | Wholesale & retail | 2018 |
| L D C Kitchens Limited | Wholesale & retail | 2012 |
| L F Physiotherapy Ltd | Health & social care | 2024 |
| L J Psychiatry Limited | Health & social care | 2023 |
| L R Campbell Roofing Ltd | Construction | 2024 |
| L Townsend Street Furniture Installations Ltd | Other services | 2017 |
| L W Cole (Electric) Ltd | Construction | 2020 |
| L&T Autobody Repairs Ltd | Wholesale & retail | 2026 |
| L&W Professional Services Limited | Professional & scientific | 2020 |
| L.D.M Renovations Ltd | Construction | 2020 |
| L.E Painting Services Ltd | Construction | 2026 |
| L.E.G Electrical Solutions Ltd | Construction | 2025 |
| L.J.Melaert Limited | Real estate | 2025 |
| L.M Electrical & Plumbing Limited | Construction | 2018 |
| L.S Insulation Ltd | Administrative & support | 2018 |
| L.Steele Company Ltd | Real estate | 2025 |
| LA Maison Galante Ltd | Hospitality | 2023 |
| LA Recovery Limited | Transport & logistics | 2021 |