| Lightwood Lodges Ltd | Hospitality | 2023 |
| Likrys Ltd | Wholesale & retail | 2019 |
| Lilly Austin Property Development Ltd | Real estate | 2019 |
| Lilly House Limited | Health & social care | 2020 |
| Lime Accountancy Services Ltd | Professional & scientific | 2020 |
| Lime Turtle Designs Ltd | Manufacturing | 2015 |
| Limitless Strength and Conditioning Ltd | Arts & recreation | 2026 |
| Linh Nails Beauty Ltd | Other services | 2025 |
| Lino's Garage Limited | Wholesale & retail | 2018 |
| Lionheart Consultants Ltd | Professional & scientific | 2025 |
| Lipski UK Limited | Wholesale & retail | 2000 |
| Liquid House Ltd | Manufacturing | 2023 |
| Lite Properties & Investment Group Ltd | Real estate | 2024 |
| Lite Retail Telecom Ltd | Information & communication | 2020 |
| Little Bridge Management Limited | Real estate | 2001 |
| Little Dessert Shop Burton Ltd | Hospitality | 2024 |
| Little HAY Cattery Limited | Other services | 2015 |
| Little Lullabies Limited | Education | 2022 |
| Little Monsters Day Nursery Ltd | Health & social care | 2012 |
| Little Park Holiday Homes Ltd | Hospitality | 2025 |
| Little Scholars Community Nursery Ltd | Education | 2015 |
| Live the Dream Narrowboats Limited | Manufacturing | 2014 |
| Livens Limited | Wholesale & retail | 2003 |
| Livi London Ltd | Transport & logistics | 2018 |
| Lizzie Love Consulting Ltd | Professional & scientific | 2026 |
| LJA Estate Limited | Real estate | 2022 |
| Ljbaker Limited | Real estate | 2025 |
| LJG Engineering Ltd | Construction | 2025 |
| Ljones Electrical Limited | Construction | 2020 |
| LJS Instrumentation Ltd | Professional & scientific | 2012 |
| LK Burton Limited | Households | 2021 |
| Lkoy Limited | Health & social care | 2021 |
| LKW Phoenix Trans Limited | Transport & logistics | 2023 |
| Llewellyn Management Services Ltd | Professional & scientific | 2013 |
| LLM Recruitment Limited | Administrative & support | 2025 |
| Lloyd-Knight Limited | Real estate | 2016 |
| Lloydshire Group Limited | Wholesale & retail | 2025 |
| LMS Networks Technology Ltd | Information & communication | 2025 |
| Loaded Fries and Jackets Ltd | Hospitality | 2026 |
| Local Lets Staffordshire Limited | Real estate | 2016 |
| Lockfit (Contracts) Ltd | Administrative & support | 2021 |
| Lockfit (Management) Ltd | Administrative & support | 2020 |
| Lockfit (NW Leics) Ltd | Administrative & support | 2020 |
| Lockfit Franchises Limited | Other services | 2018 |
| Lockfit Leicester NW Contracts Ltd | Administrative & support | 2024 |
| Lockfit Ltd | Other services | 2018 |
| Locus Environmental Ltd | Construction | 2026 |
| Lofts Associates Limited | Health & social care | 2016 |
| LOGHIN82 Ltd | Transport & logistics | 2021 |
| Logic-Ticks Ltd | Professional & scientific | 2023 |
| Lol's Pubs & Bars Ltd | Hospitality | 2018 |
| Longhand Data Limited | Information & communication | 2001 |
| Longspaces Limited | Arts & recreation | 2013 |
| Longvale Limited | Manufacturing | 1986 |
| Lonpro Highgate Limited | Real estate | 2018 |
| Lonpro Holdings Limited | Construction | 2016 |
| Loop Ltd | Wholesale & retail | 2026 |
| Lorek & Sons Tree Services Ltd | Agriculture & fishing | 2025 |
| Lorobu Ltd | Wholesale & retail | 2025 |
| Lotfy Ltd | Health & social care | 2021 |
| Lotus Care Services Limited | Health & social care | 2020 |
| Louie Sibley Limited | Real estate | 2022 |
| Lounais Limited | Other services | 2025 |
| Love Life More Ltd | Administrative & support | 2022 |
| LOVE2SALVAGE Limited | Transport & logistics | 2020 |
| LOVEHOMES4U Ltd | Hospitality | 2026 |
| LOYALT8 & Trade Ltd | Wholesale & retail | 2022 |
| LSK Commercial Limited | Professional & scientific | 2007 |
| Lstc Group Ltd | Professional & scientific | 2001 |
| Lstc Holdings Ltd | Financial services | 2022 |
| LT Dispute Resolution Limited | Professional & scientific | 2022 |
| Luck & Hope Ltd | Construction | 2017 |
| Lucky 666 Ltd | Hospitality | 2024 |
| Lucky Monkey Foods Ltd | Hospitality | 2022 |
| Luka Engineering Limited | Professional & scientific | 2025 |
| Lumen Event Group Ltd | Other services | 2025 |
| Lumirae Ltd | Wholesale & retail | 2025 |
| Luna Attire Limited | Wholesale & retail | 2025 |
| Luna Eden Publishing Limited | Manufacturing | 2024 |
| Luna Shapewear Limited | Wholesale & retail | 2023 |
| Lundi Education and Care Services Ltd | Health & social care | 2019 |
| Luson Limited | Professional & scientific | 2024 |
| Lustofin Ltd | Transport & logistics | 2018 |
| Luxe Doll Lashes Ltd | Wholesale & retail | 2021 |
| Luxlayers Ltd | Wholesale & retail | 2026 |
| Luxs Trading Ltd | Wholesale & retail | 2024 |
| Luxuricare Ltd | Health & social care | 2024 |
| LYK Logistics Ltd | Transport & logistics | 2026 |
| Lymes PFM Ltd | Construction | 2009 |
| Lynch Cinematography Limited | Information & communication | 2015 |
| Lytnetwork Ltd | Information & communication | 2023 |
| M & K Transport Limited | Manufacturing | 2019 |
| M & P Property Associates LLP | | 2024 |
| M & R Electrical Limited | Construction | 2003 |
| M a C Motors Ltd | Wholesale & retail | 2004 |
| M a D Movers Ltd | Wholesale & retail | 2015 |
| M Dughan Electrical Limited | Construction | 2016 |
| M G Lift Services Ltd | Construction | 2003 |
| M J Bull Properties Ltd | Real estate | 2025 |
| M J Fisher Holdings Ltd | Real estate | 2024 |