| Lionsden Consulting Ltd | Professional & scientific | 2025 |
| Lionsgate Tech Services Limited | Real estate | 2016 |
| Liptech Consulting Ltd | Information & communication | 2018 |
| Litacc Limited | Professional & scientific | 2016 |
| Little Bird Development Ltd | Hospitality | 2024 |
| Little Drummer BOY Cocina Limited | Hospitality | 2022 |
| Little EES Group Ltd | Real estate | 2025 |
| Little Kali Ltd | Wholesale & retail | 2020 |
| Little Legends Playhouse Ltd | Arts & recreation | 2020 |
| Little Stars Childcare Sale Limited | Education | 2023 |
| Little Wears Limited | Wholesale & retail | 2024 |
| Little Wild Patch Events Limited | Arts & recreation | 2026 |
| Littlenlarge.Com Limited | Financial services | 2003 |
| LIZ Clough Cosmetics Ltd | Other services | 2023 |
| LIZ Oates Consulting Limited | Professional & scientific | 2022 |
| LJ Property Management NW Ltd | Real estate | 2026 |
| LJI Property Limited | Real estate | 2020 |
| LK Carriers Ltd | Wholesale & retail | 2021 |
| LK Hair Limited | Other services | 2025 |
| LK Shipping UK Ltd | Transport & logistics | 2016 |
| LKR Development Ltd | Real estate | 2021 |
| LKT Consulting Limited | Information & communication | 2010 |
| Llanzabedrog Properties LLP | | 2021 |
| Lloyd Paton-L.P.M. Limited | Wholesale & retail | 1961 |
| Lloyds Golf Performance Limited | Arts & recreation | 2020 |
| LMR Consultancy Group Ltd | Administrative & support | 2024 |
| LMW Group Ltd | Administrative & support | 2026 |
| Lockdown Luminaires Limited | Wholesale & retail | 2020 |
| Locrn Ltd | Professional & scientific | 2024 |
| Lola Loto Health Limited | Health & social care | 2022 |
| Longcroft Homes Ltd | Real estate | 2025 |
| Longdate Limited | Professional & scientific | 1989 |
| Longevity Services Limited | Real estate | 2009 |
| Longford Homes Limited | Construction | 2023 |
| Longmire Consultants Limited | Professional & scientific | 2015 |
| Longrock Electrical Services Limited | Administrative & support | 2014 |
| Longwall Property Limited | Real estate | 2016 |
| Looman Ltd | Wholesale & retail | 2022 |
| Loop RX Limited | Professional & scientific | 2025 |
| Lopez Technical Services Ltd | Manufacturing | 2023 |
| Loren Networks Holding Ltd | Manufacturing | 2023 |
| Lorena Close Management Company Limited | Real estate | 2007 |
| Lottho Limited | Professional & scientific | 2018 |
| Lotties Cosmetics Ltd | Wholesale & retail | 2024 |
| Loubill Limited | Financial services | 2022 |
| Louis Pearson Ltd | Hospitality | 2025 |
| Loupaul Limited | Wholesale & retail | 2021 |
| Louskn Ltd | Other services | 2025 |
| Love Mantra Limited | Wholesale & retail | 2020 |
| Love to Frame Limited | Information & communication | 2017 |
| Lovelace Racing Ltd | Arts & recreation | 2025 |
| Lovell Associates Ltd | Health & social care | 2025 |
| Loweco Limited | Wholesale & retail | 1984 |
| Loweracre Limited | Professional & scientific | 2013 |
| Loxley Taxation Services Limited | Professional & scientific | 2006 |
| LP Manchester Limited | Hospitality | 2019 |
| LPD LAB Services Holdings Limited | Professional & scientific | 2015 |
| LPD LAB Services Limited | Professional & scientific | 2008 |
| LPW Signs & Graphics Ltd | Manufacturing | 2024 |
| Lsdp Ltd | Health & social care | 2021 |
| Lucca Services Ltd | Other services | 2025 |
| Lucky BEE GIN Ltd. | Manufacturing | 2020 |
| Lucky Phoenix Ltd | Hospitality | 2025 |
| LUCKYWOK2018 Ltd | Hospitality | 2018 |
| Lugar Foods Limited | Hospitality | 2024 |
| Luke Paul Interiors Limited | Construction | 2023 |
| Lukefivefour Ltd | Wholesale & retail | 2025 |
| Lulil Ltd | Real estate | 2021 |
| Lulu Bite Ltd | Manufacturing | 2025 |
| Lulu&Lili Ltd | Hospitality | 2025 |
| Lumi Wears Limited | Administrative & support | 2018 |
| Lumiere & Co UK Ltd | Professional & scientific | 2026 |
| Lumiere Beauty Ltd | Other services | 2026 |
| Luminer Home Ltd | Wholesale & retail | 2018 |
| Lund Properties (Manchester) Limited | Real estate | 2020 |
| Lusso Interiors & Bathrooms Limited | Construction | 2026 |
| Lusso Lunch Ltd | Manufacturing | 2020 |
| Lustera Ltd | Wholesale & retail | 2025 |
| LUX Residences GBR Ltd | Real estate | 2024 |
| Luxury Barbers MCR Ltd | Other services | 2024 |
| LVJ Holdings Ltd | Professional & scientific | 2021 |
| Lvmh Ltd | Administrative & support | 2024 |
| LW Wealth Limited | Real estate | 2025 |
| LWA Holdings Ltd | Financial services | 2020 |
| LWC Productions Ltd | Information & communication | 2018 |
| LWM Holdings Limited | Financial services | 2005 |
| Ly&C Property Holdings Ltd | Financial services | 2026 |
| Lydgate Trading Company Limited | Wholesale & retail | 2023 |
| Lydia Estate Ltd | Real estate | 2025 |
| Lynkco Ltd | Professional & scientific | 2021 |
| Lynn Properties Limited | Real estate | 2017 |
| Lynx Management Ltd | Professional & scientific | 2006 |
| Lyrical Medical Writing Services Limited | Professional & scientific | 2020 |
| Lyss Consulting Ltd | Professional & scientific | 2024 |
| M & F Services | | 1999 |
| M & L Porter Limited | Education | 2015 |
| M & N Contracting Ltd | Construction | 2022 |
| M B News (NW) Ltd | Wholesale & retail | 2012 |
| M Freeholds Ltd | Construction | 2010 |
| M J 5 Consulting Ltd | Professional & scientific | 2015 |