| Linacrest Properties Limited | Real estate | 1972 |
| Linck Consultancy Ltd | Professional & scientific | 2022 |
| Lind Moor Ltd | Real estate | 2023 |
| Linda Young Limited | Information & communication | 2015 |
| Lindenhall Capital Limited | Professional & scientific | 2017 |
| Line of Vision Limited | Information & communication | 2011 |
| Lineage Property Group Ltd | Households | 2024 |
| Lines and Curves Literary Ltd | Arts & recreation | 2018 |
| Ling Authentic Sound Limited | Education | 2026 |
| Lingfield Properties (Darlington) Limited | Construction | 1985 |
| Link Building Solutions Ltd | Construction | 2016 |
| Link Stone Advisory Limited | Professional & scientific | 2019 |
| Link Stone Advisory Partners Limited | Professional & scientific | 2019 |
| Links Risk Advisory Ltd | Information & communication | 2022 |
| Links Risk Ltd | Administrative & support | 2011 |
| Linorg Limited | Construction | 2004 |
| Linsky Associates Limited | Professional & scientific | 2025 |
| Lionhart Investments Limited | Financial services | 1993 |
| Lionhouse Creative Limited | Professional & scientific | 2013 |
| Little Anchor Press Limited | Manufacturing | 2025 |
| Little Bailbrook Limited | Real estate | 2013 |
| Little Blossoms Nursery School Ltd | Education | 2017 |
| Little Creature Limited | Information & communication | 2008 |
| Little Dental Co Limited | Health & social care | 2006 |
| Little Dental Co Property Limited | Real estate | 2017 |
| Little Horse Media Ltd | Manufacturing | 2024 |
| Little INK Enterprises Ltd | Information & communication | 2015 |
| Little LAB Ltd | Wholesale & retail | 2012 |
| Little Lost Robot CIC | Arts & recreation | 2020 |
| Little Portrait Company Ltd | Arts & recreation | 2016 |
| Little Scribblers Ltd | Education | 2006 |
| Little Smoker Limited | Hospitality | 2026 |
| Little Smudge Let's Ltd | Real estate | 2025 |
| Little Stream Software Limited | Information & communication | 2014 |
| Little Tulip Limited | Arts & recreation | 2019 |
| Little Willows Day Nursery Limited | Education | 2009 |
| Little Wins Competitions Ltd | Arts & recreation | 2025 |
| Live at the Monument Ltd | Information & communication | 2019 |
| Live Resilience Limited | Other services | 2025 |
| Livelens Ltd | Information & communication | 2024 |
| Livestamp Limited | Information & communication | 2018 |
| Living Colour Gardens Limited | Administrative & support | 2011 |
| Living Word Christian Centre | Professional & scientific | 2000 |
| LIZ Stoneman Therapy Ltd | Health & social care | 2025 |
| Lizard Lounge Limited | Hospitality | 1997 |
| Ljtouch Limited | Wholesale & retail | 2022 |
| Ljwp Services Limited | Professional & scientific | 2025 |
| Lkhl Ltd | Real estate | 2021 |
| Lksb Services Limited | Professional & scientific | 2020 |
| LL Marketing Consultancy Limited | Administrative & support | 2021 |
| Llewellyn Harker Limited | Professional & scientific | 2000 |
| Llyl Properties Ltd | Real estate | 2019 |
| Lmbt Property Limited | Real estate | 2019 |
| LME Capital Ltd | Real estate | 2023 |
| LMT Developments Limited | Extraterritorial | 1997 |
| Localverse Platforms Ltd | Information & communication | 2023 |
| Locksbrook Renovations Ltd | Construction | 2025 |
| Lockwood & Rann Investments Limited | Real estate | 2009 |
| Lodestar Consulting Ltd | Professional & scientific | 2025 |
| Lodge Homes (Bath) Limited | Real estate | 2013 |
| Logic 2000 Limited | Information & communication | 2014 |
| Lola Rose Jewellery Limited | Wholesale & retail | 2002 |
| Lombard House (Bath) Limited | Hospitality | 1972 |
| Lomond House Group Limited | Real estate | 2022 |
| London & Country Mortgages Limited | Financial services | 1986 |
| London Bath Block Management Ltd | Households | 2025 |
| London Bath Property Limited | Real estate | 2017 |
| London Clinical Radiology LLP | | 2021 |
| London Construction 1 Limited | Construction | 2026 |
| London Orthodontics Limited | Professional & scientific | 2004 |
| London Residual Limited | Other services | 2009 |
| London Road Partnership | Other services | 1998 |
| London Telecom Limited | Information & communication | 2024 |
| Long Beach Farm Limited | Real estate | 2003 |
| Long Reach Legal Limited | Administrative & support | 2009 |
| Longacre (Belvedere) Limited | Construction | 2015 |
| Longacre (Corsham) Limited | Construction | 2023 |
| Longacre Cherry Lane Limited | Real estate | 2022 |
| Longacre Cherry Lettings Limited | Real estate | 2023 |
| Longacre Development Limited | Construction | 2019 |
| Longacre Development One Limited | Construction | 2020 |
| Longacre Rengen Eveleigh Limited | Real estate | 2020 |
| Longacre Residential Limited | Real estate | 2019 |
| Longman Group Co., Ltd | Real estate | 2025 |
| Longmeadow Beckington Limited | Households | 2021 |
| Longmeadow Media Limited | Information & communication | 2025 |
| Longpre Furniture Limited | Manufacturing | 1994 |
| Longtail TV Limited | Information & communication | 2017 |
| Longwaite Ltd | Agriculture & fishing | 2020 |
| LONVERA1840 Limited | Wholesale & retail | 2025 |
| Lord Architecture Ltd | Professional & scientific | 2017 |
| Lords of Cleaning Bath Ltd | Administrative & support | 2019 |
| Lords Survey and Valuation Limited | Professional & scientific | 2025 |
| Lordship of Cannington Limited | Extraterritorial | 2007 |
| Lordswood | Other services | 2019 |
| Lore Health Ltd | Health & social care | 2025 |
| Lorraine House Strategy Consulting Ltd | Administrative & support | 2010 |
| Lost Destinations Limited | Administrative & support | 2017 |
| Lost Instruments Ltd | Manufacturing | 2023 |
| Lost Isle Project Ltd | Wholesale & retail | 2020 |