| Larchfield Place (Stowmarket) Management Company Limited | Households | 2005 |
| Larkheath Properties Limited | Households | 1999 |
| Larry Scott Training Limited | Professional & scientific | 2014 |
| Lars (Gfuk) Holdings Limited | Professional & scientific | 2010 |
| Lars Investments Limited | Administrative & support | 2009 |
| Laser Clays Entertainment Limited | Arts & recreation | 2014 |
| Laser Heads Ltd | Manufacturing | 2024 |
| Laser Visuals Limited | Information & communication | 1998 |
| Lasergraphics Limited | Manufacturing | 1998 |
| Last & Grain Ltd | Manufacturing | 2026 |
| Latch and Latte CIC | Health & social care | 2026 |
| Launch Rooms Limited | Professional & scientific | 2012 |
| Laura Whicker Ltd | Wholesale & retail | 2025 |
| Laurea Tech Consulting Ltd | Professional & scientific | 2020 |
| Laurel Group Limited | Administrative & support | 2022 |
| Lavinia Gilbey Design Limited | Professional & scientific | 2021 |
| Lawfordlifelab Ltd | Health & social care | 2025 |
| Lawn Farm Sheep Limited | Agriculture & fishing | 2024 |
| Lawn Sound Ltd | Construction | 2023 |
| Lawrence Moran Properties Limited | Real estate | 2009 |
| LAWYER4LIFE Limited | Professional & scientific | 2022 |
| Layout Design Ltd | Wholesale & retail | 2025 |
| Lazare Backa Ltd | Wholesale & retail | 2022 |
| LB Accounting (Shropshire) Limited | Professional & scientific | 2013 |
| LB Engineering Limited | Information & communication | 2009 |
| LB Surveys Ltd | Professional & scientific | 2022 |
| LBB Project Management Limited | Professional & scientific | 2011 |
| LBS GM Ltd | Administrative & support | 2025 |
| LCM Labour Limited | Administrative & support | 2021 |
| LD Leadership Consultancy Ltd | Other services | 2023 |
| LE Grand Societe Ltd | Professional & scientific | 2013 |
| LE NID D'Oiseaux Limited | Hospitality | 2016 |
| LE Refuge Design Ltd | Professional & scientific | 2017 |
| LEA Hall Energy Limited | Energy | 2015 |
| Leafhop Ltd | Real estate | 2021 |
| Leaman Garage Limited | Wholesale & retail | 2026 |
| Lean Energy Saving Services Ltd | Extraterritorial | 2008 |
| Leanher Limited | Other services | 2026 |
| Leanscope Ltd | Health & social care | 2016 |
| Leap English Ltd | Education | 2021 |
| Learn to Go Driver Training Limited | Education | 2024 |
| Lease Smart Ltd | Administrative & support | 2011 |
| Leasemanco Limited | Extraterritorial | 2004 |
| Leaton Hydrogeology Limited | Professional & scientific | 2018 |
| Lebec Developments Ltd | Other services | 2000 |
| Lectrix Group UK Ltd | Financial services | 2025 |
| Lectrix Limited | Administrative & support | 2007 |
| Ledwyche Cattle Ltd | Agriculture & fishing | 2018 |
| LEE Blower Homes Limited | Construction | 2018 |
| LEE Bridge Barns Management Company Limited | Households | 2009 |
| LEE Bridge Solutions Ltd | Hospitality | 2016 |
| LEE David Taylor Limited | Education | 2016 |
| LEE Fung House Limited | Hospitality | 2021 |
| LEE Sing Takeaway Limited | Hospitality | 2023 |
| Leeke's Plumbing & Heating Ltd | Construction | 2023 |
| Legacy Property Group Ltd | Real estate | 2019 |
| Legal and Professional Services Limited | Professional & scientific | 2022 |
| Legion Barbers Ltd | Other services | 2018 |
| Legion Hair Replacement Ltd | Health & social care | 2025 |
| Leighton Court (Salop) Limited | Households | 2006 |
| Leighton PUB Company Ltd | Hospitality | 2020 |
| Lennon Group of Companies Ltd | Other services | 2023 |
| Lennox Homes Ltd | Real estate | 2025 |
| LEO Logistics Ltd | Transport & logistics | 2013 |
| Leocor Holdings Limited | Financial services | 2025 |
| Leonard Amador Ltd | Professional & scientific | 2024 |
| LES Holdings Limited | Professional & scientific | 2019 |
| Let-It-Be Properties Ltd | Real estate | 2013 |
| Lettingsupermarket.Com Franchising Limited | Real estate | 2023 |
| Lettingsupermarket.Com Limited | Real estate | 2012 |
| Levate Solutions Ltd | Manufacturing | 2016 |
| Levelling Staff Limited | Professional & scientific | 1999 |
| Levelup Escapes Limited | Arts & recreation | 2021 |
| Levins (Furnishers) Limited | Real estate | 1939 |
| Levitine Limited | Real estate | 2010 |
| Lewis Heating Services (2013) Ltd | Construction | 2013 |
| Lewis Marston Contractors Limited | Construction | 2002 |
| Lewis Plant Services Limited | Administrative & support | 2009 |
| Lewis Solutions Ltd | Wholesale & retail | 2010 |
| Lewis Wealth Management Limited | Financial services | 2013 |
| Lewisham Way Management Company Limited | Households | 2016 |
| LF Aesthetics & Beauty Ltd | Other services | 2026 |
| LG Inspections (Midlands) Ltd | Professional & scientific | 2013 |
| LGB Shrewsbury Limited | Administrative & support | 2010 |
| LGH Investments Ltd | Financial services | 2023 |
| LGH Prop Co Ltd | Real estate | 2023 |
| LGL Properties Limited | Real estate | 2013 |
| LH Shrop Properties Ltd | Administrative & support | 2023 |
| Lhardysolutions Ltd | Real estate | 2023 |
| LHB Shrewsbury Limited | Professional & scientific | 2024 |
| LHK Performance Cars Ltd | Wholesale & retail | 2016 |
| LHO Race Engineering Limited | Wholesale & retail | 2014 |
| Liam Evans Tyres Ltd | Wholesale & retail | 2016 |
| Libertine Lettings Limited | Real estate | 2016 |
| Libra Commercial Solutions Limited | Professional & scientific | 2009 |
| Liebscom Limited | Information & communication | 2023 |
| Life Shed Ltd | Education | 2019 |
| Lifecash Limited | Administrative & support | 2011 |
| Lifeland Learning Limited | Information & communication | 2016 |
| Lifestyle Choice Ltd | Professional & scientific | 2019 |