| Lipped Ltd | Wholesale & retail | 2024 |
| Liquifyre Ltd | Financial services | 2020 |
| Liquoricelino Printmaking Limited | Arts & recreation | 2023 |
| Lisapat and Sons Properties Limited | Real estate | 2021 |
| Litire Professional Services Ltd | Administrative & support | 2016 |
| Little Acorns Films Limited | Information & communication | 2024 |
| Little and Large Productions Ltd | Arts & recreation | 2016 |
| Little Angels Childcare Limited | Health & social care | 2014 |
| Little Asset Investments Limited | Real estate | 2018 |
| Little Britain Health Ltd | Health & social care | 2022 |
| Little Giraffes Nursery Ltd | Health & social care | 2025 |
| Little Green Self Storage Limited | Real estate | 2015 |
| Little Haven Centre Ltd | Health & social care | 2026 |
| Little Haven Children's Home Ltd | Health & social care | 2025 |
| Little Heroes Home Nursery Ltd | Health & social care | 2022 |
| Little Legs (Colchester) Limited | Health & social care | 2012 |
| Little Market After School Club C.I.C. | Education | 2013 |
| Little Market Day Nursery Limited | Education | 2013 |
| Little Napoli Pizza Ltd | Hospitality | 2025 |
| Little Orchards Residents' Association Limited | Real estate | 2011 |
| Little Scandi Baby Ltd | Wholesale & retail | 2024 |
| Little Spring Cuisine Limited | Hospitality | 2016 |
| Little Wonders Day Nursery Ltd | Health & social care | 2024 |
| Littleangels Care Services Ltd Ltd | Health & social care | 2025 |
| Live Creative Experience Limited | Professional & scientific | 2009 |
| Live Creative Limited | Manufacturing | 2010 |
| Live Events Entertainment Ltd | Arts & recreation | 2024 |
| Live in the Light Ltd | Real estate | 2019 |
| Live Life and Prosper Bookings Ltd | Information & communication | 2024 |
| Live Life Better Ltd | Wholesale & retail | 2020 |
| Liverham Limited | Real estate | 2019 |
| Liverpool Lions Limited | Real estate | 2023 |
| Living Pro Ltd | Wholesale & retail | 2022 |
| Living Things Ltd | Other services | 2012 |
| Living Wealth UK Ltd | Wholesale & retail | 2012 |
| Living With Computers Ltd | Professional & scientific | 2021 |
| LIVING2CARE Ltd | Health & social care | 2025 |
| LIZ Kentish Coaching Limited | Extraterritorial | 2013 |
| LJ Designs and Landscapes Limited | Administrative & support | 2021 |
| Ljcp Contract Services Ltd | Health & social care | 2016 |
| LJG Enterprises Ltd | Wholesale & retail | 2021 |
| LJH Build Limited | Construction | 2013 |
| LJH Contractors Ltd | Construction | 2019 |
| LJH Projects Limited | Construction | 2017 |
| LJK & Company Limited | Administrative & support | 2010 |
| Ljoy Entertainment Ltd | Information & communication | 2023 |
| LJS Elec Services Limited | Construction | 2021 |
| LK North East London LLP | | 2022 |
| Lkim Properties Ltd | Real estate | 2024 |
| LL Logistics Ltd | Transport & logistics | 2021 |
| Lloyd David Ltd | Extraterritorial | 2006 |
| LLS Cleaning Services Ltd | Administrative & support | 2023 |
| Lluxe Ltd | Professional & scientific | 2015 |
| LM KAY Building Services Limited | Construction | 2025 |
| LM KAY Group Ltd | Real estate | 2019 |
| LM Perfect Clean Limited | Administrative & support | 2023 |
| LM Quay Management Ltd | Real estate | 2025 |
| Lm.Fix.Building Ltd | Construction | 2026 |
| LMA Leadership Coaching and Development Ltd | Education | 2026 |
| LMC Gadgets U.K. Ltd | Wholesale & retail | 2023 |
| LMG Electrical Contractors Ltd | Construction | 2025 |
| LMG Mortgages Ltd | Financial services | 2024 |
| LMN Property Management Ltd | Real estate | 2024 |
| Lmsa Ltd | Construction | 2022 |
| LMV Homes Ltd | Real estate | 2023 |
| LND Deco Ltd | Construction | 2024 |
| LNV Facades Ltd | Construction | 2023 |
| Loadlink Ltd | Information & communication | 2023 |
| Lobetua Ltd | Wholesale & retail | 2026 |
| Local Govt Insights Ltd | Professional & scientific | 2013 |
| Local Tools Ltd | Wholesale & retail | 2019 |
| Lochside Property Ltd | Real estate | 2025 |
| Lock Keepers Heights Residents Association Limited | Households | 1999 |
| Lock Keepers Heights RTM Company Limited | Households | 2006 |
| Lock King Ltd | Administrative & support | 2012 |
| Lockfit Ilford Ltd | Administrative & support | 2025 |
| Lockharts Investments Limited | Real estate | 2024 |
| Lockin Esports Limited | Administrative & support | 2025 |
| Locksville Limited | Construction | 2014 |
| Locma 2020 Ltd | Hospitality | 2020 |
| Locumhive Limited | Other services | 2016 |
| Lodge Ninety Limited | Real estate | 2024 |
| Lodhi Properties Limited | Real estate | 2021 |
| Loft & Roof UK Limited | Construction | 2017 |
| Loft MB Luxe Ltd | Hospitality | 2026 |
| Logan's Plate Limited | Manufacturing | 2017 |
| Logarithm UK Ltd | Wholesale & retail | 2014 |
| Logaze Designs Limited | Financial services | 2025 |
| Logicvista Technologies Ltd | Information & communication | 2025 |
| Logistic Holdings (MTD) Limited | Transport & logistics | 2009 |
| Logistic Partners (MTD) Limited | Transport & logistics | 2009 |
| Logizly Ltd | Information & communication | 2026 |
| Lol-Tee Ltd | Wholesale & retail | 2019 |
| Lolly B Services Limited | Administrative & support | 2026 |
| Lomas Wood Ltd | Construction | 2022 |
| Lomash Wood Ltd | Construction | 2025 |
| Lomet (UK) Limited | Arts & recreation | 2012 |
| Lomolink Consulting Ltd | Education | 2019 |
| London & Essex Builders Ltd | Construction | 2020 |
| London & Essex Electrical Training Ltd | Education | 2020 |