| Lindsay Park Properties Limited | Real estate | 1984 |
| Lineament Ltd. | Professional & scientific | 2011 |
| Lini Siby Ltd | Health & social care | 2023 |
| Link Electrical Installations Ltd | Construction | 2010 |
| Link Investment Associates Limited | Professional & scientific | 2020 |
| Link Network Installation Ltd. | Construction | 2020 |
| LINK24 Ltd | Transport & logistics | 2022 |
| Linseal International Ltd | Professional & scientific | 2015 |
| Linseal LLP | | 2015 |
| Linslade House Ltd | Real estate | 2016 |
| Linton Productions Limited | Information & communication | 2011 |
| Lioden Proserve Ltd | Professional & scientific | 2018 |
| Lion Advisory & Consulting Ltd | Professional & scientific | 2024 |
| Lipa Investments Limited | Real estate | 2023 |
| Liquify Ltd | Information & communication | 2021 |
| Lisa Collins Ltd. | Other services | 2005 |
| Lisa Scott Photography Limited | Professional & scientific | 2018 |
| Listfast.Ai Ltd | Information & communication | 2025 |
| Little Angels of Leamington Spa LLP | | 2012 |
| Little Brocklesby House Limited | Health & social care | 2002 |
| Little Brown Bear Investments Limited | Real estate | 2025 |
| Little Ears Audio Limited | Information & communication | 2019 |
| Little Fishes Childcare Rugby Ltd | Health & social care | 2025 |
| Little Fishes Daycare Ltd | Health & social care | 2025 |
| Little Grange Nursery Limited | Education | 2022 |
| Little Swans Day Nursery Ltd | Education | 2025 |
| Little Tots Day Nursery Ltd | Education | 2022 |
| Little Wren Interiors Ltd | Wholesale & retail | 2020 |
| Littleindiarugby Ltd | Hospitality | 2026 |
| Living Free Limited | Wholesale & retail | 2018 |
| Livingstone Avenue Householders Ltd | Households | 2019 |
| LJ Sport Consultancy Ltd | Arts & recreation | 2023 |
| LJB Surveying Group Ltd | Professional & scientific | 2026 |
| LJC & TN Services Ltd | Financial services | 2014 |
| LJX Properties Limited | Real estate | 2026 |
| LK Trans Ltd | Transport & logistics | 2014 |
| LKJ Properties Ltd | Real estate | 2018 |
| LKR Business Solutions Limited | Administrative & support | 2024 |
| LKS Transport Ltd | Transport & logistics | 2013 |
| LLK Trans Ltd | Transport & logistics | 2017 |
| LMB Inn Ltd | Hospitality | 2023 |
| LMC Physiotherapy Ltd | Health & social care | 2019 |
| Lmco Ltd | Hospitality | 2017 |
| LME Adventures Ltd | Administrative & support | 2025 |
| LMK Builders Limited | Construction | 2012 |
| LNR Property Holdings Ltd | Real estate | 2021 |
| Loading Bay Spares Ltd | Construction | 2023 |
| Loading Bay Supplies Limited | Construction | 2023 |
| Loading Bay Supplies.Com Limited | Construction | 2023 |
| Lobodzin Limited | Transport & logistics | 2017 |
| Local Housing Management Ltd | Real estate | 2021 |
| Local Shop (Rugby) Limited | Wholesale & retail | 2026 |
| Localmedic Group Ltd | Education | 2014 |
| Lockewood Spinney Ltd | Health & social care | 2026 |
| Lockwood Structures Ltd | Construction | 1982 |
| Lodge Plant Limited | Administrative & support | 2019 |
| Loft Style Properties Limited | Real estate | 2015 |
| Loftus Engineering Limited | Manufacturing | 2015 |
| Logan (Health & Safety Consultants) Limited | Professional & scientific | 2016 |
| Loganberry Properties Limited | Real estate | 2025 |
| Logic Automotive Group Ltd | Wholesale & retail | 2025 |
| Logic Electrical Installations Limited | Construction | 2002 |
| Logic Group Ltd | Information & communication | 2017 |
| Logic Lyfts Limited | Information & communication | 2019 |
| Logic Property Portfolio Ltd | Real estate | 2022 |
| Logo Adrk Limited | Households | 2023 |
| Lohans Enterprise Ltd | Health & social care | 2014 |
| Lohe Property Limited | Real estate | 2023 |
| Lomist Ltd. | Professional & scientific | 2015 |
| Lomm Limited | Information & communication | 2025 |
| London Driving Force Limited | Education | 2026 |
| London Q Ltd | Extraterritorial | 2023 |
| Lone Dodo Limited | Professional & scientific | 2020 |
| Long Distance Haulage Limited | Transport & logistics | 2024 |
| Long Hollow Farms Limited | Financial services | 2024 |
| Long March Motors Limited | Wholesale & retail | 2007 |
| Long Road Transport Ltd | Transport & logistics | 2023 |
| Longham Farm Enterprises Limited | Agriculture & fishing | 2019 |
| Longrigg Holdings Ltd | Financial services | 2022 |
| Longstayport Limited | Wholesale & retail | 2018 |
| Lopatko Trans Ltd | Transport & logistics | 2021 |
| Lorax Compliance (Holdings) Limited | Financial services | 2014 |
| Lorax Compliance Limited | Information & communication | 2014 |
| Lord Promotions Limited | Professional & scientific | 2022 |
| Lore Enterprise Limited | Wholesale & retail | 2020 |
| Lorensen Services Ltd | Wholesale & retail | 2019 |
| Lorien Securities Limited | Administrative & support | 2010 |
| Lorrydriver Limited | Transport & logistics | 2019 |
| Lorven Properties Limited | Real estate | 2019 |
| Lorvenit Ltd | Information & communication | 2022 |
| LOS Trans Ltd | Wholesale & retail | 2016 |
| Lotus Leaf Limited | Health & social care | 2007 |
| Lotusbits Limited | Wholesale & retail | 2005 |
| Louis Simpson Limited | Construction | 1942 |
| Louvella Healthcare Ltd | Health & social care | 2023 |
| Love Heart Community CIC | Education | 2024 |
| Lowcenergy Ltd | Professional & scientific | 2018 |
| Lower Street Garage (Rugby) Limited | Wholesale & retail | 1995 |
| Lowry Court Ltd | Households | 2007 |
| LPR Mortgage Services Limited | Financial services | 2014 |