| Karner Limited | Professional & scientific | 2014 |
| Kasa Cleaning Services Limited | Administrative & support | 2024 |
| Katzenhaus IT Ltd | Information & communication | 2025 |
| KB Auctions Ltd | Wholesale & retail | 2024 |
| KE Investment Properties Ltd | Real estate | 2025 |
| KEE Groundwork and Build Ltd | Construction | 2026 |
| Keith Roberts Ltd | Administrative & support | 2012 |
| Kennedy Consulting Ltd | Professional & scientific | 2013 |
| Kennedy Property Ltd | Real estate | 2022 |
| Kensington Cricklewood Ltd | Professional & scientific | 2024 |
| Kensington Health Solutions Limited | Administrative & support | 2022 |
| Kenyon Planning Limited | Professional & scientific | 2009 |
| Kermincham Hall Barns Limited | Professional & scientific | 2017 |
| Kevin Hayward Lettings Limited | Real estate | 2021 |
| Key Green Ltd | Extraterritorial | 2020 |
| Key Telemarketing Ltd | Information & communication | 2023 |
| Keys Property Ltd | Real estate | 2016 |
| Keytech Development Design Limited | Professional & scientific | 2013 |
| KF Websites Ltd | Professional & scientific | 2021 |
| Khjj Ltd | Health & social care | 2025 |
| Kimorra Limited | Wholesale & retail | 2009 |
| Kineo Consultants Ltd | Administrative & support | 2017 |
| Kingdon Smith Clothing Limited | Wholesale & retail | 2021 |
| Kingfisher BD Restaurant Ltd | Hospitality | 2023 |
| Kirktaverns Limited | Hospitality | 2023 |
| Kirsty Carr Limited | Professional & scientific | 2020 |
| Kitchen Crafts and Furniture LLP | | 2013 |
| Kiwi-Systems.Com Ltd | Manufacturing | 2003 |
| KJM Property Limited | Real estate | 2019 |
| Klajar Ltd | Wholesale & retail | 2019 |
| Kleen EYE for Detail Limited | Administrative & support | 2024 |
| KMB Pipelines Ltd | Construction | 2021 |
| Knights Defence Security Ltd | Administrative & support | 2025 |
| Knutsford K9 Ltd | Agriculture & fishing | 2019 |
| Knype Holdings Limited | Financial services | 2022 |
| Kobe Gift Ltd | Wholesale & retail | 2023 |
| Koda Technologies Ltd | Information & communication | 2026 |
| KOH Ltd | Information & communication | 2025 |
| Kornalska Ltd | Professional & scientific | 2021 |
| Koyo Wellbeing Ltd | Health & social care | 2024 |
| Kpsutcliffe Ltd | Hospitality | 2024 |
| Krazy Carp Ltd | Wholesale & retail | 2024 |
| Krepler Limited | Professional & scientific | 2012 |
| Kriggle Limited | Professional & scientific | 2015 |
| Kriptical Limited | Professional & scientific | 2012 |
| Kryogenix Ltd | Arts & recreation | 2023 |
| KS Studios Limited | Administrative & support | 2020 |
| KT Recruitment Consulting Ltd | Administrative & support | 2019 |
| Kutchenhaus (Congleton) Ltd | Wholesale & retail | 2023 |
| Kxcp Ltd | Real estate | 2023 |
| Kxrp Ltd | Real estate | 2022 |
| Kynoch Construction Services Limited | Administrative & support | 2010 |
| Kystle Limited | Professional & scientific | 2012 |
| Kytran Limited | Professional & scientific | 2012 |
| L & G Bracegirdle Limited | Financial services | 2000 |
| L & J Print Ltd | Manufacturing | 2017 |
| L Lees Limited | Real estate | 2007 |
| L Mills Hospitality Limited | Hospitality | 2024 |
| L P Landscapes (NW) Ltd | Administrative & support | 2025 |
| L Tomlins Care Services Limited | Health & social care | 2022 |
| L&P Distribution Ltd | Wholesale & retail | 2024 |
| L.A Cars (Cheshire) Ltd | Wholesale & retail | 2018 |
| L.M.Stanway Ltd | Health & social care | 2019 |
| L.R.C. (4X4) Holdings Limited | Professional & scientific | 2009 |
| LA FE Limited | Professional & scientific | 2016 |
| LA Nucia Limited | Professional & scientific | 2012 |
| Lacalera Limited | Professional & scientific | 2012 |
| Ladderstile Farm Barns Limited | Real estate | 2021 |
| Lads Landscape & Developments Ltd | Administrative & support | 2013 |
| Laila Rose Ltd | Wholesale & retail | 2025 |
| Lakemill Group Ltd | Construction | 2023 |
| Lala Chef Ltd | Hospitality | 2014 |
| Lamprit Limited | Professional & scientific | 2012 |
| Lancashire Food Store Ltd | Wholesale & retail | 2006 |
| Land Procurement Limited | Real estate | 2025 |
| Lani Contractors Ltd | Construction | 2016 |
| Lannoy Limited | Professional & scientific | 2011 |
| Lanolla Limited | Professional & scientific | 2010 |
| Lanot Limited | Professional & scientific | 2011 |
| Lanox Limited | Professional & scientific | 2011 |
| Lansdowne Property Consulting Limited | Real estate | 2015 |
| Laridae Ltd | Professional & scientific | 2015 |
| Larvin-Clegg Funeral Directors Ltd | Other services | 2024 |
| LAS Marinas Limited | Professional & scientific | 2020 |
| Laserline Holdings Ltd | Real estate | 2023 |
| Laugh ‘N’ Learn Tutoring Ltd | Education | 2024 |
| Lawson Motor Company Holdings Limited | Financial services | 2020 |
| Lawson Motor Company Limited | Wholesale & retail | 1976 |
| Lawton ST Bar Ltd | Hospitality | 2017 |
| LB Dance Company Ltd | Arts & recreation | 2025 |
| LB Motor Trade Ltd | Wholesale & retail | 2024 |
| LC Aviation Limited | Manufacturing | 2018 |
| LCS Business Ltd | Professional & scientific | 2020 |
| LDC Homes Ltd | Real estate | 2026 |
| LDG Associates Ltd | Professional & scientific | 2023 |
| LDW Core Talent Limited | Administrative & support | 2025 |
| LDW Pre-Construction Services Ltd | Professional & scientific | 2022 |
| LE Cognac Ltd | Hospitality | 2024 |
| Lead & Resolve Ltd | Professional & scientific | 2025 |
| Leader Business Consultancy Ltd | Professional & scientific | 2024 |