| LAA Consultancy Limited | Information & communication | 2023 |
| Label Research & Development Limited | Administrative & support | 2000 |
| Labels That Work Ltd | Manufacturing | 2026 |
| Labrix Limited | Wholesale & retail | 1990 |
| Ladybrook Car Valeting Centre Ltd | Administrative & support | 2020 |
| Ladybrook Car Wash Ltd | Administrative & support | 2024 |
| Ladybrook DZH Limited | Hospitality | 2026 |
| Ladybrook Market Ltd | Wholesale & retail | 2019 |
| Lake Healthcare Ltd | Health & social care | 2015 |
| Lalbp Commercial Ltd | Extraterritorial | 2023 |
| Lally Inter Trading Limited | Wholesale & retail | 2018 |
| Lambley White Limited | Health & social care | 2025 |
| Laminate Master Limited | Wholesale & retail | 2019 |
| Land Rover Diagnostics Limited | Wholesale & retail | 2019 |
| Landmark Community Foundation | Education | 2009 |
| Landmark Facilities Group Ltd | Administrative & support | 2025 |
| Lando Assets Ltd | Real estate | 2026 |
| Lanes Decorating Limited | Construction | 2017 |
| Langwith Junction Childcare | Education | 2005 |
| LAP Property Group Ltd | Real estate | 2025 |
| Larkman Properties Limited | Real estate | 2016 |
| Laser Marking Limited | Professional & scientific | 2014 |
| Latbema Limited | Wholesale & retail | 2019 |
| Laurentiu Delivery Ltd | Transport & logistics | 2023 |
| Lavender Listings Ltd | Real estate | 2014 |
| Lavish Trading Ltd | Wholesale & retail | 2026 |
| Lawn Hills Developments Limited | Construction | 2025 |
| Lawntec North Notts Limited | Administrative & support | 2021 |
| Lawson Group Holdings Limited | Construction | 2021 |
| Lawson Property (Services) Limited | Construction | 2012 |
| Lazar Logistics Ltd | Transport & logistics | 2025 |
| Lazarcompany Ltd | Transport & logistics | 2025 |
| LB Legal Representation Limited | Professional & scientific | 2016 |
| LBC Projects Ltd | Construction | 2014 |
| LC Leisure Ltd | Manufacturing | 2019 |
| LCM Brothers Limited | Real estate | 2026 |
| LD Groundworks & Flood Defence Ltd | Administrative & support | 2015 |
| LE Brenne Consultancy Ltd | Information & communication | 2010 |
| Leaber Limited | Education | 2012 |
| Leaden Roding Ltd | Transport & logistics | 2022 |
| Leaders Care Solutions Limited | Health & social care | 2023 |
| Leaders Care Support Ltd | Health & social care | 2025 |
| Leadership Gateway | Administrative & support | 2016 |
| Leak Seek Repair Limited | Construction | 2025 |
| Lean Enterprise Associates Limited | Professional & scientific | 2012 |
| Learn and Adapt Limited | Education | 2025 |
| Learning With Linden Limited | Wholesale & retail | 2006 |
| Leavers Lace Limited | Administrative & support | 2005 |
| LED Displays (SDM) UK Ltd | Construction | 2012 |
| Led-Mirrors Ltd | Wholesale & retail | 2026 |
| LEE Brack Ltd | Extraterritorial | 2024 |
| LEE Dowdall (Nottingham) Ltd | Wholesale & retail | 2024 |
| LEE Solicitors Ltd | Professional & scientific | 2010 |
| Lee's Plumbing & Heating Ltd | Construction | 2011 |
| LEG Property Management Ltd | Hospitality | 2019 |
| Legacy Night Investment Ltd | Hospitality | 2018 |
| Legionella Risk Assessment and EPC Limited | Administrative & support | 2014 |
| Legit Property Services Ltd | Real estate | 2025 |
| Leicester Financial Advice Bureau Ltd | Financial services | 2014 |
| Leighton-Hennessy Brothers Ltd | Real estate | 2025 |
| Lemia Ltd | Wholesale & retail | 2025 |
| Lepo Trans Ltd | Construction | 2017 |
| Lester & Bingley Limited | Real estate | 2022 |
| Let's Talk Leads Limited | Professional & scientific | 2023 |
| Letsee Ltd | Real estate | 2022 |
| Letting Ready Limited | Real estate | 2026 |
| LETTINGS365 Limited | Real estate | 2016 |
| Lewis Close Developments Ltd | Construction | 2016 |
| Lewislaceyel Ltd | Professional & scientific | 2023 |
| Leymar Ltd | Health & social care | 2012 |
| LG Machining Ltd | Real estate | 2019 |
| LG MAX Trading Ltd | Financial services | 2026 |
| LH Surfacing Ltd | Construction | 2021 |
| Liam Mulvany Limited | Health & social care | 2002 |
| Liberty Bay Ltd | Real estate | 2025 |
| Liberty Trail Children's Homes Unus Ltd | Health & social care | 2024 |
| Libra Intermediaries Limited | Financial services | 2018 |
| Lichfield Consultancy Ltd | Professional & scientific | 2020 |
| Lichri Management Limited | Professional & scientific | 2010 |
| Lidar Health Solutions Limited | Health & social care | 2026 |
| Lidore Aesthetics Ltd | Other services | 2026 |
| Life of Riley Landscapes Limited | Administrative & support | 2024 |
| Lifemove Limited | Real estate | 2000 |
| Liga Holdings Limited | Real estate | 2022 |
| Lige Limited | Extraterritorial | 2014 |
| Light Flight Limited | Administrative & support | 1997 |
| Lighthouse (Mansfield) Ltd | Other services | 2026 |
| Lighthouse International Christian Centre Limited | Other services | 2025 |
| Lighthouse Literary Ltd | Information & communication | 2017 |
| Lighting Project Solutions Limited | Manufacturing | 2018 |
| Lightyear Films Ltd | Information & communication | 2011 |
| Ligno Services Ltd | Construction | 2024 |
| Lilley Collective Ltd | Real estate | 2024 |
| Lilley-Brown Properties Ltd | Real estate | 2026 |
| Lilyfranks Estates Ltd | Households | 2025 |
| Lilywood Developments Limited | Construction | 2025 |
| Lime Tree Software Solutions Limited | Information & communication | 2022 |
| Linc Capital Partners Ltd | Financial services | 2026 |
| Linc Ventures Ltd | Financial services | 2026 |
| Linc.Urban Ltd | Real estate | 2025 |