| Leisure Boat UK Ltd | Arts & recreation | 2008 |
| Lekh RAJ Punj Ltd | Real estate | 2018 |
| Lemmon Creative Limited | Arts & recreation | 2016 |
| Lemonfizz Ltd | Administrative & support | 2011 |
| Lemuel Logistics Ltd | Transport & logistics | 2025 |
| LES Frenes Properties Limited | Real estate | 2020 |
| Leshek Trans Ltd | Transport & logistics | 2019 |
| Letia Limited | Professional & scientific | 2005 |
| Level Playing Field | Health & social care | 2017 |
| Level Social Ltd | Professional & scientific | 2021 |
| Level Talent Management Limited | Professional & scientific | 2025 |
| Leveltone Limited | Construction | 1992 |
| Leversfield Property LLP | | 2024 |
| Levi's Hard Work IS Limited | Manufacturing | 2025 |
| Levitation 29 Limited | Professional & scientific | 2018 |
| Levitschi Films Ltd | Information & communication | 2018 |
| Levoria Marketing Ltd | Professional & scientific | 2025 |
| Lexplore Analytics Limited | Education | 2017 |
| Leya&Alessia Ltd | Wholesale & retail | 2022 |
| Leycester Securities Limited | Real estate | 1980 |
| LFA Advanced Practice Ltd | Health & social care | 2018 |
| LG Roofing & Upvc Ltd | Construction | 2026 |
| LGK Construction Ltd | Professional & scientific | 2015 |
| Lh&Sh Properties Ltd | Real estate | 2022 |
| LHI Commercial Investments Ltd | Real estate | 2025 |
| LHI Investments Ltd | Real estate | 2017 |
| Libertine Burger (Leamington Spa) Ltd | Wholesale & retail | 2018 |
| Libertine Burger (Rugby) Limited | Hospitality | 2019 |
| Libertine Burger (SUA) Limited | Hospitality | 2023 |
| Libertine Burger Events Limited | Hospitality | 2021 |
| Libertine Burger Holdings Ltd | Financial services | 2018 |
| Libertine Production Kitchen Limited | Manufacturing | 2021 |
| Libra Property Solutions Limited | Real estate | 2018 |
| Lick PR Ltd | Professional & scientific | 2014 |
| Lickwood Property Company Limited | Real estate | 1962 |
| Life and Progress Limited | Financial services | 2016 |
| Lifecare Clinics UK Limited | Professional & scientific | 2001 |
| Lighting Experts Limited | Manufacturing | 2023 |
| Lights-On Consulting Limited | Professional & scientific | 2005 |
| Lills PAD Ltd | Administrative & support | 2012 |
| Lily & Carl Eyewear Ltd | Wholesale & retail | 2020 |
| Lilybell’S Child Minding Ltd | Education | 2025 |
| Limefizz Ltd | Professional & scientific | 2026 |
| Limelight Associates Limited | Manufacturing | 1992 |
| Limitless Projects Limited | Construction | 2020 |
| Linas Restaurant and Bar Ltd | Hospitality | 2025 |
| Lincoln Court Management (Warwick) Limited | Households | 1977 |
| Linda Scannell Limited | Information & communication | 2015 |
| Lindex UK Fashion Ltd | Manufacturing | 2013 |
| Lindsay KAY Bridal Ltd | Wholesale & retail | 2023 |
| Lindsey Property Group Ltd | Construction | 2020 |
| Linear Furnishings Limited | Wholesale & retail | 2013 |
| Link Asset Management Ltd | Real estate | 2025 |
| Link Energy Services Ltd | Construction | 2020 |
| Linkit Advanced Solutions Limited | Information & communication | 2016 |
| Linnext UK Limited | Administrative & support | 2021 |
| Liquid Inns Limited | Hospitality | 2006 |
| Liquid Spirit Events Limited | Hospitality | 2025 |
| Litchford Consulting Limited | Professional & scientific | 2000 |
| Litchford Estates Limited | Construction | 1999 |
| Little Acorns Nurseries Ltd | Health & social care | 2023 |
| Little Cat Media Ltd | Information & communication | 2026 |
| Little Meadows Warwick Ltd | Health & social care | 2023 |
| Little Street Holdings Ltd | Financial services | 2021 |
| Little Street Properties Ltd | Real estate | 2021 |
| Live Electrical Installations Limited | Manufacturing | 2019 |
| Liver Five Solutions Limited | Information & communication | 2018 |
| Livingstone IFA Limited | Financial services | 2013 |
| LJM Car Body and Paint Refinishing Ltd | Wholesale & retail | 2018 |
| LJS Creative Ltd | Professional & scientific | 2020 |
| Lkdk Property Ltd | Real estate | 2022 |
| LMG Plant Hire Ltd | Construction | 2017 |
| Lockley Fladbury LLP | | 2025 |
| Lockley Homes (Callow END) Ltd | Construction | 2023 |
| Lockley Homes (Fladbury) Management Company Ltd. | Households | 2026 |
| Lodestone Patient Care Limited | Professional & scientific | 1991 |
| Loft Conversions Plans Ltd | Professional & scientific | 2011 |
| Logic 360 Ltd | Administrative & support | 2011 |
| Logik Holdings Limited | Financial services | 2020 |
| Lolica Ltd | Health & social care | 2013 |
| Lomography UK Limited | Wholesale & retail | 2009 |
| Look After Baby Limited | Professional & scientific | 2003 |
| Look Who's Talking Ltd | Professional & scientific | 2024 |
| Loop My World Ltd | Information & communication | 2020 |
| LOOP54 Ltd | Information & communication | 2016 |
| Loose Cannons Ltd | Manufacturing | 2021 |
| Louis Poulsen UK Limited | Manufacturing | 1985 |
| Louniam Investments Limited | Financial services | 2019 |
| Louso Ltd | Wholesale & retail | 2023 |
| Louvell Events Ltd | Administrative & support | 2025 |
| Lovely Ingredients Solutions Ltd | Wholesale & retail | 2024 |
| Lovely Ltd | Wholesale & retail | 2018 |
| Loves Consultancy Limited | Other services | 2015 |
| LOW Carbon Truck Consultancy Ltd | Professional & scientific | 2020 |
| Lowell James Developments Limited | Construction | 2023 |
| Lowick Limited | Wholesale & retail | 1997 |
| Loxley Building & Maintenance Limited | Construction | 2018 |
| Loxley Four Management Limited | Households | 2022 |
| Loxley House RTM Company Ltd | Households | 2026 |
| Loxton Asset Management Limited | Real estate | 2024 |