| Lakhpur Midlands Ltd | Transport & logistics | 2025 |
| LAL & Co Designs Ltd | Professional & scientific | 2020 |
| LAL Concrete Post and Fencing Products Limited | Manufacturing | 2015 |
| Lalli Prestige Homes Ltd | Real estate | 2025 |
| Lamgeo Properties Limited | Households | 2023 |
| Lamic Properties Ltd | Construction | 2024 |
| Land & Line Solutions Ltd | Transport & logistics | 2025 |
| Lands Ecommerce Ltd | Information & communication | 2025 |
| Langley Auto Care Ltd | Wholesale & retail | 2019 |
| Lara Moloney Limited | Information & communication | 2017 |
| Lareinaphipps Limited | Extraterritorial | 2025 |
| Laser Cutting & Architectural Panel Systems Ltd | Manufacturing | 2024 |
| Lasteve Packaging Limited | Administrative & support | 2025 |
| Latest Kitchens & Bedrooms Ltd | Construction | 2014 |
| Latifiah Fultali Complex Limited | Health & social care | 2015 |
| Laurad Limited | Transport & logistics | 2020 |
| Lawanson Healthcare Solution Ltd | Health & social care | 2023 |
| Laxmi Puja Limited | Hospitality | 2022 |
| Layal Consultancy Ltd | Education | 2025 |
| Layal Group Ltd | Wholesale & retail | 2025 |
| LB Fasteners Ltd | Manufacturing | 2019 |
| LD Distributors Limited | Manufacturing | 2007 |
| LEA Green Project Limited | Professional & scientific | 2020 |
| Legacy of Apollo Digital Frontier LLP | | 2024 |
| Lenuta Cleaning Services Ltd | Administrative & support | 2019 |
| Leothehair Ltd | Other services | 2026 |
| Let's GET Financial Ltd | Information & communication | 2025 |
| Let's GET Property Ltd | Real estate | 2026 |
| Lewis Family Builders Ltd | Administrative & support | 2018 |
| Leyletts Engineering Company Limited | Manufacturing | 1977 |
| Lhire Clothing Ltd | Wholesale & retail | 2024 |
| Libchaber Garden Ltd | Transport & logistics | 2011 |
| Liberty Asset Holdings Ltd | Real estate | 2017 |
| Lidhar and SON Limited | Construction | 2016 |
| Lidhar Haulage Ltd | Transport & logistics | 2010 |
| Life Boost Formula Ltd | Manufacturing | 2024 |
| Lifestyles Development Ltd | Construction | 2026 |
| Lifestyles Housing Limited | Real estate | 2019 |
| Lifestyles Property Ltd | Real estate | 2018 |
| Lightswood Limited | Real estate | 2026 |
| Lightweight Trading Ltd | Wholesale & retail | 2023 |
| Likacs Catering Limited | Hospitality | 2020 |
| Lilian Dickson 247 Ltd | Health & social care | 2020 |
| Lime & Lemon Entertainment Limited | Administrative & support | 2025 |
| Lime and Coconut Properties Limited | Real estate | 2023 |
| Lime Healthcare Plus Limited | Health & social care | 2020 |
| Lime Healthcare Support Limited | Other services | 2017 |
| Limitless Breath Academy Ltd | Health & social care | 2026 |
| Link Recruitment & Education Ltd | Administrative & support | 2020 |
| Link Recruitment Payroll Limited | Administrative & support | 2025 |
| Links Logistics Limited | Transport & logistics | 2025 |
| Linkway Medical Properties Ltd | Real estate | 2018 |
| Lionel Logistics Ltd | Transport & logistics | 2019 |
| Lira Barber Ltd | Other services | 2025 |
| Little AVA Nursery Ltd | Health & social care | 2026 |
| Little Miss Cuisine Ltd | Hospitality | 2021 |
| Littlefield Lane Chippy Ltd | Hospitality | 2022 |
| Live Experience Midlands Ltd | Information & communication | 2023 |
| Lkjv Ltd | Wholesale & retail | 2025 |
| Lksg Ltd | Real estate | 2024 |
| Lnce Ltd | Wholesale & retail | 2026 |
| Lnyamare Healthcare Ltd | Health & social care | 2025 |
| Local Maintenance Ltd | Administrative & support | 2023 |
| Lockley & Co Group Ltd | Real estate | 2025 |
| Lodge Car Sales Ltd | Wholesale & retail | 2022 |
| Lodge Store Ltd | Wholesale & retail | 2020 |
| Logos Growth Solutions Ltd | Professional & scientific | 2019 |
| Lolliepop Creations Ltd | Hospitality | 2022 |
| London Auto Traders Ltd | Wholesale & retail | 2025 |
| Longia Group Limited | Wholesale & retail | 2026 |
| Longia Ltd | Real estate | 2025 |
| Longwear Alloys Limited | Manufacturing | 2012 |
| Longwear Holdings Limited | Professional & scientific | 2012 |
| Longwear Limited | Manufacturing | 2012 |
| Longwear Products Limited | Financial services | 2025 |
| LOR Property Midland Ltd | Real estate | 2021 |
| Lord Branchington Ltd | Wholesale & retail | 2022 |
| Lorvaine Ltd | Wholesale & retail | 2026 |
| Louch Holdings Limited | Financial services | 2016 |
| Louis XO Ltd | Real estate | 2020 |
| Lovd.It Limited | Manufacturing | 2025 |
| Lovejeet Investment Ltd | Real estate | 2023 |
| Lovenske Potravin Limited | Wholesale & retail | 2025 |
| Lowol Ltd | Construction | 2025 |
| Loxley Lodge Care Home Limited | Health & social care | 2015 |
| Loúmaison Ltd | Hospitality | 2024 |
| LPK1 Construction Ltd | Construction | 2025 |
| LS Estates and Holdings Ltd | Real estate | 2025 |
| LSS Delivery Limited | Administrative & support | 2025 |
| LSW Limited | Real estate | 2026 |
| LTB M2 Ltd | Real estate | 2023 |
| LTS AJ Services Ltd | Construction | 2021 |
| Lucarelli Holdings Limited | Hospitality | 2019 |
| Lucarelli Inn Limited | Hospitality | 2019 |
| Luckas Transport Ltd | Transport & logistics | 2016 |
| Lucky Penny Fish Bar Ltd | Wholesale & retail | 2023 |
| Lumavi Logistics Ltd | Transport & logistics | 2024 |
| Lumexa Limited | Wholesale & retail | 2026 |
| Lunare Home Ltd | Wholesale & retail | 2025 |
| Luxe Skin Aesthetics Clinic Ltd | Health & social care | 2026 |