| Little Jumper Limited | Arts & recreation | 2023 |
| Little Life Solutions Ltd | Professional & scientific | 2020 |
| Little Nugget Films Limited | Information & communication | 2021 |
| Little Red DOT Trading Company Limited | Wholesale & retail | 2024 |
| Live Easy Property Ltd | Professional & scientific | 2023 |
| Live Gallery Media Events Limited | Information & communication | 2010 |
| Live Gallery Productions Limited | Real estate | 2008 |
| Livewell Wellness Ltd | Manufacturing | 2025 |
| Living Brave Limited | Professional & scientific | 2014 |
| Living Without Limits Ltd | Education | 2023 |
| LIZ Monk Limited | Hospitality | 2014 |
| LJ Jackson Limited | Other services | 2019 |
| LJ Tinting Ltd | Construction | 2023 |
| LJ Trading Ltd | Wholesale & retail | 2024 |
| LJB PHG Ltd | Construction | 2026 |
| LKT Limited | Professional & scientific | 2002 |
| Lloyd and Smith Limited | Construction | 2001 |
| Lloyd Properties Limited | Real estate | 2016 |
| Lloyds Plumbing & Bathrooms Ltd | Construction | 2023 |
| LLT Talking Therapy Ltd | Professional & scientific | 2022 |
| LMK Care Service Ltd | Health & social care | 2015 |
| Location Routes Management Ltd | Information & communication | 2022 |
| Loch Golf Limited | Administrative & support | 2024 |
| Lockform Projects Limited | Construction | 2021 |
| Lockhart Meyer Limited | Information & communication | 2005 |
| Lockwood Trade Limited | Wholesale & retail | 2026 |
| Locton Limited | Manufacturing | 1982 |
| Lodge Court (Stourport) Management Limited | Real estate | 2019 |
| Loey Holdings Limited | Financial services | 2026 |
| Logosoft Limited | Information & communication | 1992 |
| Longhall Limited | Wholesale & retail | 2022 |
| Longview Therapy Ltd | Health & social care | 2024 |
| Loombri Ltd | Extraterritorial | 2016 |
| Lord of the North Limited | Information & communication | 2019 |
| Lorenzo Street Productions Limited | Arts & recreation | 2021 |
| Lotus Workforce Development Ltd | Professional & scientific | 2023 |
| Louise Victoria Wedding & Event Hire Ltd | Professional & scientific | 2022 |
| Loutay Aesthetics Limited | Other services | 2020 |
| Love & Malpass Property Ltd | Real estate | 2023 |
| Love in Sync Ltd | Other services | 2015 |
| Love Mondays REC2REC Ltd | Administrative & support | 2025 |
| Love Property Investors Ltd | Households | 2021 |
| Loveamor Property Solutions Ltd | Real estate | 2025 |
| LOW Cost Calls Ltd | Information & communication | 1998 |
| Lowe Light Entertainment Ltd | Information & communication | 2006 |
| Lowe's Legal Ltd | Professional & scientific | 2025 |
| Loxbox Limited | Other services | 2017 |
| Loxbrook Associates Limited | Professional & scientific | 2003 |
| LPI Education Ltd | Professional & scientific | 2025 |
| LR & LP Holdings Ltd | Financial services | 2024 |
| LRC Property Management Limited | Real estate | 2025 |
| LSN Management Limited | Professional & scientific | 2008 |
| LT Vehicle Body Repairs Ltd | Administrative & support | 2014 |
| LTF Diagnostic Services Limited | Health & social care | 2024 |
| LTF Plumbing Limited | Construction | 2024 |
| Luccarui Holdings Limited | Professional & scientific | 2014 |
| Luciditi Holdings Ltd | Extraterritorial | 2024 |
| Luciditi Ltd | Extraterritorial | 2024 |
| Lucky Cafe Limited | Hospitality | 2025 |
| Luckychap Entertainment Limited | Information & communication | 2014 |
| Luckychap UK Ventures Limited | Information & communication | 2021 |
| Luella Limited | Arts & recreation | 2013 |
| Luke Bennett Racing Ltd | Arts & recreation | 2023 |
| Luke David Carpentry & Building Limited | Construction | 2018 |
| Lulu's Little Playhouse Ltd | Health & social care | 2026 |
| Luma Barbers Ltd | Other services | 2026 |
| Lumina Creative Limited | Wholesale & retail | 2026 |
| Lumsey Ltd | Wholesale & retail | 2026 |
| Lunanex Limited | Wholesale & retail | 2025 |
| Lunitaproductions Ltd | Information & communication | 2018 |
| Lureal Earth UK Ltd | Administrative & support | 2010 |
| Lurnix Ltd | Wholesale & retail | 2026 |
| Lusso Lets Ltd | Real estate | 2025 |
| Lutra Services Limited | Extraterritorial | 2014 |
| LUX Lighting Limited | Wholesale & retail | 1982 |
| LVL Brickwork Limited | Construction | 2021 |
| LW Roofing and Building Improvements Ltd | Construction | 2017 |
| LWS Data Consulting Ltd | Information & communication | 2021 |
| Lydiate ASH Group Ltd | Administrative & support | 2026 |
| Lydiate SKT Ltd | Health & social care | 2026 |
| Lydo Innovations Limited | Wholesale & retail | 2003 |
| Lynch Consultancy Services Limited | Professional & scientific | 2021 |
| Lyons Town Planning Ltd | Professional & scientific | 2014 |
| M & K Products (Bromsgrove) Limited | Manufacturing | 2017 |
| M & L Midlands Limited | Transport & logistics | 2026 |
| M a Baines Ltd | Construction | 2018 |
| M Algul Foods Limited | Hospitality | 2024 |
| M Chilton Accountancy Services Limited | Professional & scientific | 2010 |
| M Commercial Ltd | Manufacturing | 2021 |
| M D & J D Consultancy Ltd | Professional & scientific | 2020 |
| M Davis Trading Limited | Wholesale & retail | 2016 |
| M J a Automotive Engineering Ltd | Wholesale & retail | 2011 |
| M J Douglas Limited | Real estate | 2005 |
| M J Performance Cars Ltd | Wholesale & retail | 2022 |
| M Keight Heating Engineer Limited | Construction | 2022 |
| M Kelleher & SON Limited | Construction | 2011 |
| M Kings Electrical Services Ltd | Construction | 2012 |
| M Legal Services Limited | Professional & scientific | 2014 |
| M N N J Properties Ltd | Real estate | 2019 |
| M Pugh Plant Hire Limited | Administrative & support | 2024 |