| Kinder Spirit Company Ltd | Manufacturing | 2023 |
| Kinders Agricultural Services Limited | Professional & scientific | 2014 |
| Kinders Engineering Limited | Professional & scientific | 2010 |
| King Koby York Franchise Ltd | Other services | 2017 |
| Kingdom First Events Ltd | Wholesale & retail | 2019 |
| Kinsella Waters Construction Ltd | Construction | 2022 |
| Kirk & Butler LLP | | 2014 |
| KJ Boyd International Ltd | Transport & logistics | 2016 |
| KJ Event Medical Services & Training Ltd | Other services | 2025 |
| Knightwake Farm Ltd | Agriculture & fishing | 2025 |
| Know Your Figures Ltd | Administrative & support | 2024 |
| Konektia Limited | Arts & recreation | 2018 |
| Kowt Limited | Professional & scientific | 2013 |
| KTD Corp Ltd | Wholesale & retail | 2024 |
| L & J Venture Holdings Ltd | Hospitality | 2023 |
| L & R Jodrell Property Maintenance Limited | Construction | 2022 |
| L J Norton Electrical Ltd | Construction | 2019 |
| L J R Consultancy Cheshire Ltd | Other services | 2025 |
| Labely Ltd | Manufacturing | 2018 |
| Ladybooth Limited | Administrative & support | 2010 |
| Ladygate Construction Limited | Construction | 2010 |
| Lakeland View Ltd | Hospitality | 2022 |
| Langdale Technology Ltd | Information & communication | 2007 |
| Langford and Varley Properties Ltd | Real estate | 2025 |
| Lardner Associates Ltd | Administrative & support | 2009 |
| Larkspur Communications Ltd | Professional & scientific | 2026 |
| Last Wishes Funeral Services Limited | Other services | 2019 |
| Lavinia Trading Limited | Professional & scientific | 2020 |
| Lawtay LLP | | 2025 |
| LD DC Consultants Ltd | Professional & scientific | 2024 |
| LD Tech ISP Services Ltd | Information & communication | 2022 |
| Leadbetter Property Services Ltd | Construction | 2018 |
| LEARN2SOAR Limited | Information & communication | 2003 |
| Leathley & Co Ltd | Professional & scientific | 2002 |
| Legacy IT Consultants Limited | Professional & scientific | 2011 |
| Legal Badger LLP | | 2025 |
| Legally Blonde Limited | Other services | 2021 |
| Leigh Manning Air Conditioning Services Ltd | Manufacturing | 2017 |
| Level 13 Ltd | Real estate | 2024 |
| LEX Business Solutions Ltd | Administrative & support | 2018 |
| LGS Property Services Ltd | Real estate | 2025 |
| LI LUI Ltd | Professional & scientific | 2013 |
| Lifeaccordingtochelsea Ltd | Wholesale & retail | 2024 |
| Lifestyle Breaks Ltd | Hospitality | 2021 |
| Lifestyle Products Limited | Real estate | 2004 |
| Like a River Co Ltd | Professional & scientific | 1996 |
| Lilytone Limited | Manufacturing | 1990 |
| Lindowmoor Gundogs Ltd | Other services | 2021 |
| Lionhorse Limited | Information & communication | 2005 |
| Lisa Nadin Ltd | Health & social care | 2016 |
| Little Hollins Limited | Professional & scientific | 2003 |
| Live for the Hills Tours Limited | Administrative & support | 2016 |
| Live Software Limited | Extraterritorial | 2017 |
| Live Softworks Limited | Information & communication | 2013 |
| Livzi Music Limited | Arts & recreation | 2015 |
| LIZ Richardson Productions Ltd | Arts & recreation | 2020 |
| Lizard Labels Limited | Manufacturing | 2022 |
| LJC Building Ltd | Construction | 2023 |
| Llyn Property Group Ltd | Hospitality | 2026 |
| LMR Fabrication and Maintenance Ltd | Manufacturing | 2023 |
| LNR Logistics Ltd | Transport & logistics | 2018 |
| Locusrite Holdings Limited | Professional & scientific | 2004 |
| Locusrite Limited | Manufacturing | 1999 |
| Lomax DRY Stone Walling Ltd | Manufacturing | 2023 |
| Long Live in Home Care Limited | Professional & scientific | 2020 |
| Longden & Sands Properties Ltd | Real estate | 2024 |
| Longden Flooring Limited | Construction | 2011 |
| Longdon Transport Ltd | Extraterritorial | 2018 |
| Longhouse Craft Building and Conservation Limited | Construction | 2025 |
| Longman Accountancy Services Limited | Professional & scientific | 2009 |
| Lost Time Bars Ltd | Hospitality | 2023 |
| Lowe's Mill Cottages Limited | Hospitality | 1998 |
| LS Instrument Services Ltd | Manufacturing | 2022 |
| LSO Holdings NW Ltd | Real estate | 2021 |
| LSP Maintenance Services Ltd | Manufacturing | 2002 |
| LSP Properties Limited | Real estate | 2011 |
| LSP Storage Limited | Transport & logistics | 2020 |
| Luke Greenwood Software Ltd | Information & communication | 2019 |
| Luto Consulting Limited | Professional & scientific | 2015 |
| LUX Cards UK Limited | Wholesale & retail | 2025 |
| Luxe Aesthetics Hair & Beauty Ltd | Other services | 2023 |
| Luxury Holiday Lets Training Ltd | Education | 2024 |
| Luxx Construction (NW) Ltd | Construction | 2022 |
| Luxx Projects Ltd | Construction | 2026 |
| Lyceum Consulting Limited | Professional & scientific | 2011 |
| Lyncfield Services Limited | Professional & scientific | 2000 |
| M C Corrugating Services Limited | Administrative & support | 2007 |
| M Catterall Construction Services Limited | Professional & scientific | 2004 |
| Mabel Apps LLP | | 2013 |
| Macclesfield Storage Limited | Transport & logistics | 2012 |
| Majikal Media Limited | Arts & recreation | 2022 |
| Mala Property Ltd | Real estate | 2024 |
| Manchester Vehicle Repairs Ltd | Wholesale & retail | 2025 |
| Mander Real Estates Ltd | Real estate | 2020 |
| Manton Castle Ltd | Hospitality | 2026 |
| Marc Bradley Artwork Limited | Professional & scientific | 2017 |
| Marcliffe Furniture Ltd | Manufacturing | 2018 |
| Marcus Roberts Plumbing & Heating Ltd | Construction | 2012 |
| Mark Andrew TV & Film Services Ltd | Information & communication | 2014 |
| Mark Anthony Flooring Ltd | Wholesale & retail | 2023 |