| Lickas Services Ltd | Transport & logistics | 2021 |
| Life After DAN C.I.C. | Health & social care | 2022 |
| Life and Haven Care Services Ltd | Health & social care | 2026 |
| Life and Haven Essentials Ltd | Wholesale & retail | 2026 |
| Life Church (Central England) | Other services | 2004 |
| Life Cover Line Limited | Extraterritorial | 2019 |
| Life Cover Wise Ltd | Financial services | 2024 |
| Life Health Foods Limited | Manufacturing | 2000 |
| Life Itself C.I.C. | Professional & scientific | 2019 |
| Life Label Group Ltd | Manufacturing | 2023 |
| Life Pilates Ltd | Education | 2025 |
| Lifecycle Network Services Limited | Information & communication | 2020 |
| Lifecyle Projects Limited | Wholesale & retail | 2025 |
| Lifeforce Global Academy | Administrative & support | 2002 |
| Lifegrowth Wealth Ltd | Financial services | 2026 |
| Lifeline Healthcare Ltd | Health & social care | 2022 |
| Lifestile Ceramics Limited | Construction | 2002 |
| Lifestyle Houses Limited | Real estate | 2024 |
| Lifestyle Landscape and Design Limited | Construction | 2004 |
| Lifestyle Painters Ltd | Construction | 2026 |
| Lifetime Transport Limited | Transport & logistics | 2012 |
| Lift for Life Ltd | Education | 2021 |
| Lifting Safety Engineers UK Limited | Manufacturing | 2020 |
| Ligetra Ltd | Transport & logistics | 2017 |
| Light Rail Transit Association | Information & communication | 2004 |
| Light UK Properties Ltd | Real estate | 2021 |
| Light Whale International Ltd. | Arts & recreation | 2022 |
| Lighthouse Resources Ltd | Professional & scientific | 2024 |
| Lighting Electricians Ltd | Construction | 2011 |
| Lights Property Ltd | Real estate | 2023 |
| Lightspeed Broadband Limited | Information & communication | 2020 |
| Lightspeed Central Services Ltd | Information & communication | 2020 |
| Lightspeed Fibre Group Ltd | Administrative & support | 2021 |
| Lightspeed Fibre Holdings Ltd | Administrative & support | 2020 |
| Lightspeed Networks Ltd | Construction | 2013 |
| Lightspot Ltd | Wholesale & retail | 2025 |
| Lightstory Limited | Information & communication | 2025 |
| Ligma Ltd | Wholesale & retail | 2025 |
| Liighthouse Limited | Professional & scientific | 2023 |
| Lika Limited | Transport & logistics | 2019 |
| Like Properties Limited | Real estate | 2026 |
| Liken Metal Roofing Ltd | Construction | 2017 |
| LIL Blank Ltd | Transport & logistics | 2025 |
| Lila’S Care Limited | Health & social care | 2024 |
| Lilek Ltd | Wholesale & retail | 2025 |
| Lilimax Ltd | Transport & logistics | 2018 |
| Lilli's Tearoom Ltd | Hospitality | 2015 |
| Lilliput Day Nursery (Spalding) Ltd | Health & social care | 2013 |
| Lilliput Play Cafe Ltd | Hospitality | 2026 |
| Lily MAE Home Care Limited | Health & social care | 2016 |
| Lily of the Valley Limited | Hospitality | 2024 |
| Lily Rose Construction Ltd | Construction | 2016 |
| Lima House Designs Limited | Professional & scientific | 2023 |
| Lime Comms Limited | Wholesale & retail | 2025 |
| Limestone Homes Ltd | Construction | 2025 |
| Liminarc Ltd | Information & communication | 2026 |
| Limo 4 U Ltd | Transport & logistics | 2013 |
| Limux Trans Ltd | Transport & logistics | 2016 |
| Limwi Limited | Health & social care | 2017 |
| Linastransport Ltd | Transport & logistics | 2015 |
| Lincoln City Motors Ltd | Wholesale & retail | 2019 |
| Lincoln RD Flats Ltd | Households | 2018 |
| Lincoln Road Barber Ltd | Real estate | 2025 |
| Lincolnshireairporttravels Ltd | Transport & logistics | 2025 |
| Lincs Contracting Ltd | Construction | 2026 |
| Lincs MOT & Recovery Ltd | Wholesale & retail | 2015 |
| Lincs Transport Ltd | Transport & logistics | 2017 |
| Lincvision Ltd | Administrative & support | 2023 |
| Linda Carr Accountants Limited | Professional & scientific | 2011 |
| Linden Gardens Limited | Real estate | 2004 |
| Lindsey Court Management Company Limited | Administrative & support | 1993 |
| Lindvest Capital Limited | Agriculture & fishing | 2012 |
| LINEX24 Care Services Ltd | Administrative & support | 2023 |
| LINEX24 Property Ltd | Real estate | 2023 |
| Linkit Technologies Limited | Information & communication | 2025 |
| Linksafe Ltd | Administrative & support | 2021 |
| Linkway Logistics Ltd | Transport & logistics | 2024 |
| Linkzco Ltd | Administrative & support | 2024 |
| Linley Rental Properties Limited | Real estate | 2018 |
| Linton (Paddock Green) Residents Company Limited | Households | 2026 |
| Linton (White Rose) Residents Company Limited | Households | 2026 |
| Linton Meadow Residents Company Limited | Other services | 2022 |
| Lion Investing Future Ltd | Transport & logistics | 2025 |
| Lionheart 1956 Limited | Construction | 2019 |
| Lions Education Ltd | Wholesale & retail | 2020 |
| Lionsprop Ltd | Real estate | 2020 |
| Lips and Linez Collective Ltd | Other services | 2025 |
| Lipscore UK Ltd | Information & communication | 2022 |
| Liquid Applied Insulation Ltd | Extraterritorial | 2024 |
| Liquid Ecig UK Limited | Wholesale & retail | 2016 |
| Liquidons Limited | Water & waste | 2021 |
| Liro Property Ltd | Real estate | 2021 |
| Lister Petter Engine Company Limited | Manufacturing | 2022 |
| Lister Petter IPR Holdings Limited | Information & communication | 2017 |
| Liteman Limited | Manufacturing | 2014 |
| Litt Property Management Ltd | Real estate | 2020 |
| Little Acorns Day Nursery (EA) Ltd | Health & social care | 2023 |
| Little Birch Enterprises Ltd | Manufacturing | 2025 |
| Little Chiefs Day Nurseries Limited | Health & social care | 2020 |
| Little Chiefs Day Nursery One Limited | Health & social care | 2020 |