| Leads Flow Limited | Professional & scientific | 2018 |
| Leaf Renewable Energy Limited | Construction | 2022 |
| Leam Consulting Limited | Professional & scientific | 2017 |
| Leam Investments Limited | Real estate | 2021 |
| Leam Rent Limited | Real estate | 2024 |
| Leam Terrace Management Company Limited | Households | 1975 |
| Leamester Limited | Real estate | 2017 |
| Leamington and County Golf Club,Limited(The) | Arts & recreation | 1908 |
| Leamington and Warwick Gymnastics Club Limited | Arts & recreation | 2012 |
| Leamington Art in the Park Festival Community Interest Company | Administrative & support | 2016 |
| Leamington Barber Spa Ltd | Other services | 2026 |
| Leamington Blinds Limited | Construction | 2021 |
| Leamington Cars Sales Ltd | Wholesale & retail | 2024 |
| Leamington Cricket Club | Education | 2016 |
| Leamington Cricket Club Trading Limited | Administrative & support | 2016 |
| Leamington Dog Fields Limited | Energy | 2016 |
| Leamington Eco Hub CIC | Other services | 2025 |
| Leamington Electrical Distributors Limited | Wholesale & retail | 2014 |
| Leamington Floors Limited | Wholesale & retail | 2012 |
| Leamington Football Club Limited | Arts & recreation | 1983 |
| Leamington Glass Limited | Construction | 2016 |
| Leamington Hall Farm Management Company Limited | Real estate | 1997 |
| Leamington High Line CIC | Real estate | 2024 |
| Leamington Homes Limited | Real estate | 2024 |
| Leamington Lamp Ltd | Education | 2013 |
| Leamington Laundrette Limited | Other services | 2016 |
| Leamington Lawns Limited | Administrative & support | 2025 |
| Leamington Lions Football Club CIC | Administrative & support | 2024 |
| Leamington Ltd | Construction | 2019 |
| Leamington Lymphoedema Clinic Limited | Health & social care | 2014 |
| Leamington Montessori Nursery School Limited | Education | 2019 |
| Leamington Nails & Spa 9 Ltd | Other services | 2024 |
| Leamington Peace Festival Ltd | Arts & recreation | 1999 |
| Leamington Pizza Limited | Hospitality | 2023 |
| Leamington Rugby Football Club (Trading) Ltd | Arts & recreation | 2024 |
| Leamington Sash Limited | Extraterritorial | 2018 |
| Leamington Spa Car Valeting Ltd | Wholesale & retail | 2016 |
| Leamington Spa Car Wash Ltd | Administrative & support | 2021 |
| Leamington Spa Cleaning Services Limited | Administrative & support | 2000 |
| Leamington Spa Coins Ltd | Wholesale & retail | 2023 |
| Leamington Spa Comedy Festival Limited | Arts & recreation | 2012 |
| Leamington Spa Freehold Limited | Real estate | 2018 |
| Leamington Spa Fusilier Limited | Hospitality | 2019 |
| Leamington Spa Orthodontic Centre | Administrative & support | 2010 |
| Leamington Spa Orthodontics Limited | Health & social care | 2009 |
| Leamington Spa Sailing Club | Arts & recreation | 2018 |
| Leamington Style Nails Ltd | Other services | 2024 |
| Leamington Supermarket Limited | Wholesale & retail | 2026 |
| Leamington Tiling Limited | Construction | 2024 |
| Leamington Voice Studio Ltd | Education | 2023 |
| Leamspa Group Ltd | Information & communication | 2023 |
| Leamvista Ltd | Real estate | 2025 |
| Leap Factory UK Ltd | Construction | 2020 |
| Learning Early Ltd | Wholesale & retail | 2015 |
| Learningage Games Limited | Extraterritorial | 2012 |
| Learningage Solutions Limited | Information & communication | 2005 |
| Leask Consultancy and Business Solutions Ltd | Professional & scientific | 2019 |
| Leasowes Ltd | Construction | 2021 |
| Leech Country Homes Ltd. | Construction | 1988 |
| Leedex Social Care Ltd | Health & social care | 2018 |
| Lefiore Ltd | Hospitality | 2023 |
| Legacy Ceremonies Ltd | Other services | 2025 |
| Legacy Homecare Limited | Administrative & support | 2018 |
| Legacy Lettings Limited | Real estate | 2016 |
| Legion Property Partners Ltd | Real estate | 2026 |
| Leia Property Ltd | Real estate | 2024 |
| Leigh Thompson Ltd | Professional & scientific | 2023 |
| Leila Mckenzie Associates Limited | Professional & scientific | 2018 |
| Lemon Zest Contracts Limited | Hospitality | 2018 |
| LEO & Quaver Ltd | Health & social care | 2025 |
| LEO & Quaver Properties Ltd | Real estate | 2025 |
| Leodia Solutions Ltd | Information & communication | 2022 |
| Leofric Structures Limited | Administrative & support | 2000 |
| Leopard Taxis Ltd | Transport & logistics | 2026 |
| Leorexden Ltd | Professional & scientific | 2000 |
| Leptis Magna Holdings Ltd | Financial services | 2025 |
| LES Run Ltd | Other services | 2025 |
| LET ME 1ST Limited | Real estate | 2020 |
| LET the Creators Create Consulting Ltd | Professional & scientific | 2019 |
| Level Ground Landscaping & General Building Ltd | Construction | 2025 |
| Level UP Leamington Ltd | Wholesale & retail | 2024 |
| Levity Healthcare Limited | Health & social care | 2018 |
| Lewie Media Limited | Extraterritorial | 2021 |
| Lewis Advisory Services Limited | Professional & scientific | 2014 |
| LEX 360 Limited | Professional & scientific | 2017 |
| Lexicon Commercial Ltd | Administrative & support | 2017 |
| Lexicon Wealth Management Ltd | Financial services | 2016 |
| Leximel Limited | Financial services | 2017 |
| Leyline Surveys Limited | Mining & quarrying | 2017 |
| LFW Consultancy 4U Ltd | Professional & scientific | 2018 |
| LGC Waste Management Limited | Water & waste | 2018 |
| Lialla Properties Ltd | Professional & scientific | 2022 |
| Liane Chandler & Associates Ltd | Professional & scientific | 2020 |
| Liberation Route UK Limited | Administrative & support | 2020 |
| Liberty Aluminium Technologies Ltd | Manufacturing | 2016 |
| Liberty AM Holdings (UK) Ltd | Financial services | 2018 |
| Liberty Bridge Aluminium Limited | Manufacturing | 2015 |
| Liberty Bright Bar Ltd | Manufacturing | 2019 |
| Liberty Capital Investment Ltd | Financial services | 2026 |
| Liberty Capital U.K. Ltd | Wholesale & retail | 2021 |