| Leomariya Ltd | Real estate | 2025 |
| Leonardo Rizzo Limited | Education | 2018 |
| LES Mieuxs Limited | Real estate | 2026 |
| Leshki Ltd | Wholesale & retail | 2026 |
| Lesley Anne Ltd | Administrative & support | 1995 |
| Leslie Jayne Investments Limited | Financial services | 2015 |
| LET IT Shine Limited | Administrative & support | 2025 |
| Letchworth Self Storage Limited | Real estate | 2007 |
| Lets-Begin Limited | Information & communication | 2005 |
| Letter of the Law Ltd | Professional & scientific | 2020 |
| Let’S York Ltd | Real estate | 2023 |
| Leuty Computer Consultants Limited | Information & communication | 2008 |
| Levanter (Leatherhead) Limited | Construction | 2021 |
| Lexander Consulting Limited | Wholesale & retail | 2018 |
| Lexuz Mart Ltd | Wholesale & retail | 2022 |
| LFR Property Management Limited | Construction | 2019 |
| LG Garden Limited | Administrative & support | 2024 |
| LI Greci Ltd | Information & communication | 2026 |
| Lian Yard Limited | Real estate | 2021 |
| Lianiv Ltd | Information & communication | 2017 |
| Libertad Partners Ltd | Extraterritorial | 2021 |
| Liberty Consultants Limited | Other services | 2007 |
| Libra Consulting Engineering Limited | Professional & scientific | 2022 |
| Libra Scaffolding Ltd | Construction | 2018 |
| Libra Trading International Limited | Administrative & support | 2012 |
| LID Limited | Real estate | 1995 |
| Liel Ltd | Professional & scientific | 2022 |
| Lielah Design and Management Consulting Ltd | Professional & scientific | 2021 |
| Lifelines Limited | Manufacturing | 1999 |
| Lifestages Ltd | Financial services | 2008 |
| Lift UP Scaffolding Ltd | Construction | 2025 |
| Lifton Consulting Limited | Professional & scientific | 2023 |
| Light Space Investments Ltd | Real estate | 2008 |
| Lightdrinks Limited | Wholesale & retail | 2017 |
| Lightedge Technology Limited | Information & communication | 2020 |
| Lightwater Health & Chiropractic Ltd | Health & social care | 2016 |
| Lilipro Ltd | Information & communication | 2022 |
| Lillypop Balloons Ltd | Wholesale & retail | 2025 |
| Lime Developments & Living Ltd | Real estate | 2022 |
| Lime Electrical Contractors Ltd | Construction | 2021 |
| Limecroft Hospitality Ltd | Real estate | 2021 |
| Limitless Broadcast Ltd | Information & communication | 2012 |
| Linde Canada Holdings Limited | Professional & scientific | 2010 |
| Linde Canada Investments Limited | Professional & scientific | 2024 |
| Linde Cryogenics Limited | Professional & scientific | 1997 |
| Linde Euro Finance UK Limited | Professional & scientific | 2023 |
| Linde Finance UK Limited | Professional & scientific | 2023 |
| Linde GAS Holdings Limited | Professional & scientific | 2003 |
| Linde Helium Holdings Limited | Professional & scientific | 2000 |
| Linde Investments NO.1 Limited | Professional & scientific | 2013 |
| Linde North America Holdings Limited | Professional & scientific | 2012 |
| Linde Russia UK Limited | Professional & scientific | 2020 |
| Linde UK Holdings Limited | Professional & scientific | 2007 |
| Linde UK Holdings NO.2 Limited | Professional & scientific | 2019 |
| Linde UK Private Medical Trustees Limited | Financial services | 2013 |
| Lindon Holdings Limited | Administrative & support | 2007 |
| Lindrick Claims Limited | Financial services | 2020 |
| Lindsayca Development LLP | | 2022 |
| Linea Car Sales Limited | Wholesale & retail | 2026 |
| Linenme Ltd | Wholesale & retail | 2009 |
| Lingeswaran Consulting Ltd | Professional & scientific | 2022 |
| Link Global Services Limited | Manufacturing | 2015 |
| Linkable Woking | Other services | 2007 |
| Linspot Ltd | Hospitality | 2020 |
| Lion Court (Woking) Management Company Limited | Households | 2020 |
| Lion Mountain Entertainment Ltd | Wholesale & retail | 2010 |
| Lion Products Limited | Wholesale & retail | 2024 |
| Lion Residential Limited | Real estate | 2021 |
| Lioness Property Limited | Real estate | 2019 |
| Lipscombe Farm Limited | Agriculture & fishing | 2020 |
| LIQ South East Storage Ltd | Transport & logistics | 2026 |
| Liquid Compose Limited | Information & communication | 2025 |
| Liquid Crimson Limited | Information & communication | 2012 |
| Lisa George Ltd | Other services | 2022 |
| Lismore Freehold Limited | Households | 2017 |
| Lismore WK Holding Limited | Households | 2019 |
| Lissaman Learning Ltd | Education | 2025 |
| Little Fin's Coffee & Playhouse Ltd | Hospitality | 2025 |
| Little Guest Care Ltd | Other services | 2016 |
| Little Holt Limited | Households | 1982 |
| Little Learners Tuition Ltd | Health & social care | 2026 |
| Little Milton Plotholders Limited | Real estate | 2012 |
| Little Warren Holdings Limited | Real estate | 2015 |
| Littlefair Care Ltd | Health & social care | 2024 |
| Livan Limited | Wholesale & retail | 1997 |
| Live for Fitness Ltd | Arts & recreation | 2025 |
| Live MAS UK Ltd | Hospitality | 2024 |
| Live Safety Operations Ltd | Administrative & support | 2021 |
| Live Wire Electrical Contractors Ltd | Construction | 2017 |
| Livingston Hotel Holdings Limited | Construction | 2025 |
| LIZ Haworth Limited | Other services | 2018 |
| LIZ Lockie Photography Ltd | Professional & scientific | 2021 |
| LJB Building Services Ltd | Construction | 2013 |
| LJR Business Solutions Limited | Professional & scientific | 2023 |
| LK Event Management Ltd | Administrative & support | 2017 |
| Lloyd Coombes Carpenter Ltd | Professional & scientific | 2012 |
| Lloyd Woodhouse Limited | Professional & scientific | 2014 |
| LM Dubbing - Audiovisual Limited | Information & communication | 2018 |
| LM Pro Paints Limited | Construction | 2021 |
| Lmra Trading Limited | Hospitality | 1998 |