| Krysteline Group Limited | Manufacturing | 2002 |
| Krysteline Integrated Systems Limited | Extraterritorial | 2008 |
| Krysteline Processors Limited | Extraterritorial | 2008 |
| Krysteline Sales Limited | Extraterritorial | 2008 |
| Krysteline Technologies Limited | Manufacturing | 2008 |
| Kryt Private Limited | Real estate | 2025 |
| KSM Plant Limited | Administrative & support | 2002 |
| Kulera Care Ltd | Health & social care | 2021 |
| Kuzma Enterprise Ltd | Wholesale & retail | 2026 |
| Kwella Property Ltd | Real estate | 2019 |
| Kwik Vapes Ltd | Wholesale & retail | 2025 |
| Kwjw Developments Ltd | Construction | 2019 |
| KZM (Holdings) Limited | Financial services | 2022 |
| Kzmk Property Holdings Ltd | Real estate | 2026 |
| L & B Construction Ltd | Construction | 2014 |
| L & S Kneeshaw Contractors Limited | Construction | 2012 |
| L a M Livestock Ltd | Agriculture & fishing | 2021 |
| L and D Lettings Limited | Real estate | 2018 |
| L B P H Ltd | Construction | 2023 |
| L M Price Construction Ltd | Construction | 2023 |
| L&M Estates Limited | Real estate | 2006 |
| L.A.S Logistics (SW) Limited | Transport & logistics | 2021 |
| LA Flooring Contractors Ltd | Construction | 2022 |
| Labarca Malley Ltd | Real estate | 2015 |
| Labelling & Packaging Services Limited | Transport & logistics | 1989 |
| Laburnum House Hotel Ltd | Hospitality | 2021 |
| Lacey Tootsies Ltd | Health & social care | 2023 |
| LAF Ventures Ltd | Financial services | 2018 |
| Laid in Britain Limited | Agriculture & fishing | 2005 |
| Lairds and Lewis Ltd | Arts & recreation | 2025 |
| Laleli Limited | Health & social care | 2016 |
| Lance Purchase Construction Limited | Construction | 2014 |
| Land Pensions Company Limited | Construction | 2014 |
| Landinform Limited | Information & communication | 2003 |
| Lane Williams Ltd | Wholesale & retail | 2011 |
| Langdon Group Limited | Transport & logistics | 1988 |
| Langdons Bridgwater Limited | Extraterritorial | 1998 |
| Lansdowne Projects Limited | Information & communication | 2019 |
| Lansdowne Property Limited | Real estate | 2018 |
| Lapyx Ltd | Professional & scientific | 2020 |
| Lashes on the Levels Ltd | Other services | 2025 |
| Last MAN Stands South Limited | Arts & recreation | 2015 |
| Lasuperbe Limited | Information & communication | 2015 |
| Late Stop (SW) Limited | Wholesale & retail | 2010 |
| Late Stop Southwest Limited | Administrative & support | 2010 |
| Latham Development Services Limited | Administrative & support | 2017 |
| Laudera Ltd | Wholesale & retail | 2024 |
| Launch Golf Academy 3 Hammers Ltd | Arts & recreation | 2026 |
| Launch Golf Academy Bristol Ltd | Arts & recreation | 2026 |
| Launch Golf Coaching 3 Hammers Ltd | Arts & recreation | 2026 |
| Launch Golf Coaching Bristol Ltd | Arts & recreation | 2026 |
| Laura B Limited | Hospitality | 2026 |
| Laura Clair Smith Photography Ltd | Professional & scientific | 2023 |
| Lauren Chloe Holdings Limited | Financial services | 2025 |
| Lawrence and SON Lettings Ltd | Real estate | 2025 |
| Lazy Jacques Limited | Transport & logistics | 2001 |
| LB Property Investments Ltd | Construction | 2007 |
| LB Property Management Solutions Ltd | Real estate | 2014 |
| Ldmm Freeholders Limited | Households | 2000 |
| Leadersmeets Limited | Professional & scientific | 2019 |
| Leading to Harmony Ltd | Agriculture & fishing | 2025 |
| Leah-May Tailors Limited | Other services | 2023 |
| LEE Marsh Project Management Limited | Construction | 2015 |
| Lees & Waters Limited | Real estate | 2012 |
| Lees Partnership (Taunton) Limited | Real estate | 2009 |
| Leighton Gratton Consultancy Services Ltd | Professional & scientific | 2024 |
| Leighton Transport Services Ltd | Transport & logistics | 2025 |
| Leinster AVE Shop Limited | Wholesale & retail | 2025 |
| Lenox Lifting Solutions Limited | Construction | 2015 |
| LEO Valeting Solutions Ltd | Wholesale & retail | 2019 |
| Leos Barber Shop Ltd | Other services | 2019 |
| Lethamase Ltd | Health & social care | 2014 |
| Letter There BE Love Limited | Administrative & support | 2021 |
| Levels Dog Care Ltd | Other services | 2025 |
| Levels Joinery Ltd | Manufacturing | 2021 |
| Leveret Limited | Hospitality | 2008 |
| Lewis Property Network Limited | Real estate | 2023 |
| Lewisham House Management Company Limited | Households | 2002 |
| Lewistrade Ltd | Wholesale & retail | 2026 |
| Leymal Properties LLP | | 2024 |
| Lhords Ltd | Professional & scientific | 2017 |
| Liberty Property Services Ltd. | Real estate | 2015 |
| Libra Aeroplanorum Limited | Transport & logistics | 2025 |
| Lifelong Legacy Pensions Ltd | Administrative & support | 2023 |
| Lifeworks Counselling Limited | Health & social care | 2016 |
| Liftech Solutions Limited | Administrative & support | 2002 |
| Lightpath AI Limited | Information & communication | 2025 |
| Lime Kiln Inn Ltd | Hospitality | 2021 |
| Limelight Media Group Ltd | Information & communication | 2022 |
| Lindenhurst Holding Limited | Financial services | 2022 |
| Link Parking Limited | Administrative & support | 2012 |
| Lions Court Limited | Construction | 2000 |
| Liquid Pleasures Ltd | Wholesale & retail | 2020 |
| Liquormart Properties Limited | Real estate | 1987 |
| Lisa's Laundry Service Limited | Other services | 2016 |
| Lithgow Construction Solutions Ltd | Professional & scientific | 2025 |
| Little Cheney Limited | Real estate | 2026 |
| Little Discoveries Childcare Limited | Health & social care | 2017 |
| Little FIG Limited | Arts & recreation | 2026 |
| Little Meadows Pre-School Ltd | Education | 2024 |