| Lifecrown Holdings Limited | Professional & scientific | 2015 |
| Lifecrown Investments Limited | Professional & scientific | 2001 |
| Lifeline First AID Education Ltd | Education | 2025 |
| Lifelinenutra Ltd | Wholesale & retail | 2024 |
| Lifescience Consultants Limited | Professional & scientific | 2006 |
| Lifeskeeper Limited | Wholesale & retail | 2024 |
| Lifestyle Learning Solutions Ltd | Education | 2019 |
| Lifeties Limited | Education | 2003 |
| Lift Bits Ltd | Manufacturing | 2024 |
| Lift Club Apparel UK Ltd | Wholesale & retail | 2025 |
| Liftiq Ltd | Manufacturing | 2025 |
| Light the Spark Limited | Professional & scientific | 2022 |
| Lighter Mind Wellness Limited | Wholesale & retail | 2025 |
| Lightfoot & Lowe Limited | Other services | 2017 |
| Lightfoot Property Services Limited | Real estate | 2025 |
| Lightning Logic Ltd | Information & communication | 2003 |
| Lights on Lashes Ltd | Wholesale & retail | 2020 |
| Lights OUT Box Ltd | Wholesale & retail | 2025 |
| Lightsaber Logistics Ltd | Wholesale & retail | 2023 |
| Ligmena Construction Group Ltd | Construction | 2025 |
| Lignis Ltd | Information & communication | 2026 |
| Likeminded Music Ltd | Information & communication | 2023 |
| Lilby Ltd | Information & communication | 2026 |
| Lilly & Sebastian Ventures Ltd | Information & communication | 2024 |
| Lillypuds Limited | Manufacturing | 2016 |
| Lilmaple Ltd | Wholesale & retail | 2024 |
| Lily and Shamrock Ltd | Wholesale & retail | 2025 |
| Limda Host Limited | Information & communication | 2022 |
| Lime Marketing Ltd | Professional & scientific | 2026 |
| Lime Tree Learning and Development Ltd | Education | 2018 |
| Limes Court Residents Association Limited | Households | 1985 |
| Limitless Property Services Ltd | Construction | 2024 |
| Limitless Youth Academy CIC | Education | 2019 |
| Limolio Ltd | Wholesale & retail | 2025 |
| Limonious Ltd | Wholesale & retail | 2026 |
| Limternet Ltd | Information & communication | 2026 |
| Lina Health Ltd | Information & communication | 2025 |
| Linaaya Ltd | Wholesale & retail | 2026 |
| Linden Joinery Ltd | Construction | 2023 |
| Lindsay Audio Services Limited | Administrative & support | 2014 |
| Lindsay Hargreaves Limited | Agriculture & fishing | 2010 |
| Lindumtransport Ltd | Transport & logistics | 2023 |
| Line of Control 450 Ltd | Wholesale & retail | 2025 |
| Linear Electrical Solutions Limited | Construction | 2018 |
| Lined Creative Ltd | Professional & scientific | 2023 |
| Lineside Publications Ltd. | Information & communication | 2014 |
| Link Options & Systems (UK) Limited | Information & communication | 2014 |
| Linksair Europe Ltd | Transport & logistics | 2017 |
| Linkstone Investments Limited | Real estate | 2001 |
| Linnell Installations Ltd | Construction | 2012 |
| Linton Fitness Limited | Arts & recreation | 2018 |
| Linzner & Xavier Ltd | Health & social care | 2017 |
| Lion Energy Limited | Wholesale & retail | 2017 |
| Lion King Holdings Ltd | Financial services | 2025 |
| Lion Transport and Spedition Limited | Administrative & support | 2026 |
| Lioness Pride CIC | Administrative & support | 2016 |
| Lipnickas Limited | Transport & logistics | 2025 |
| Liquid Hospitality Ltd | Hospitality | 2025 |
| Liquidup Ltd | Manufacturing | 2025 |
| Lisa Golden Limited | Wholesale & retail | 2017 |
| Lisa Johnson Podiatry Ltd | Health & social care | 2018 |
| Listoryn Service Packages Ltd | Information & communication | 2026 |
| Lisy Gont Ltd | Wholesale & retail | 2025 |
| LIT Glazing UK Ltd | Manufacturing | 2025 |
| Litchfield House Management Limited | Real estate | 2004 |
| Litealign Limited | Information & communication | 2026 |
| Litepanels Ltd | Administrative & support | 2008 |
| Literatory Ltd | Wholesale & retail | 2020 |
| Litetree Studio Ltd | Information & communication | 2026 |
| Lithium Labs Ltd | Information & communication | 2026 |
| Lithos Bike Limited | Manufacturing | 2025 |
| Lithospring Holdings Ltd | Administrative & support | 2025 |
| Little Acorns Childcare Bury ST Edmunds Limited | Education | 2023 |
| Little Angels B S E Ltd | Extraterritorial | 2015 |
| Little Angels Bury ST Edmunds Limited | Health & social care | 2005 |
| Little Aston Law Limited | Professional & scientific | 2013 |
| Little Blue BOY Group Ltd | Transport & logistics | 2023 |
| Little Charms Limited | Wholesale & retail | 2024 |
| Little Elms | Education | 2007 |
| Little Green OWL Financial Planning Ltd | Financial services | 2020 |
| Little Grey Cells Ltd | Health & social care | 2022 |
| Little Hunton Home Ltd | Real estate | 2023 |
| Little Italian Market Ltd | Hospitality | 2023 |
| Little Jarley & Co Ltd | Hospitality | 2025 |
| Little Larks Day Nursery Limited | Education | 2016 |
| Little Legends Digital Studios Ltd | Information & communication | 2026 |
| Little Parrotts Ltd | Health & social care | 2022 |
| Little Place of Peace Ltd. | Education | 2025 |
| Little Sprout Academy NI Ltd | Education | 2025 |
| Little Sunshine Nannies Ltd | Health & social care | 2026 |
| Little Wigwam Limited | Manufacturing | 2009 |
| Little Words Limited | Arts & recreation | 2021 |
| Littlemoor Developments Limited | Construction | 2007 |
| Littlethatchstudio Ltd | Hospitality | 2023 |
| Littlezoozoo Ltd | Wholesale & retail | 2023 |
| Live Channel Broadcast Limited | Information & communication | 2019 |
| Live Channel Limited | Administrative & support | 2011 |
| Live in Your Knowing Ltd | Wholesale & retail | 2021 |
| Live Love Property Limited | Construction | 2018 |
| Livebuddy Limited | Information & communication | 2025 |