| LAB Furnishing & Services Limited | Wholesale & retail | 1971 |
| LAB Hair Salon Ltd | Other services | 2019 |
| LAB3SIXTY Ltd | Manufacturing | 2021 |
| Labams Personalized Care Limited | Health & social care | 2021 |
| Label Media Limited | Extraterritorial | 2005 |
| Labello Enterprises Limited | Information & communication | 2023 |
| Labelzone Limited | Professional & scientific | 2005 |
| Labmax Clinical Care Limited | Health & social care | 2024 |
| Labrador Quay Salford (Block 15/45) Management Co Limited | Real estate | 2004 |
| Labready Ltd | Wholesale & retail | 2022 |
| Labs 4 Change Ltd | Information & communication | 2022 |
| Labtainment Ltd | Arts & recreation | 2022 |
| Laburnum Kennels Limited | Other services | 2023 |
| Laceby Park Management Company Limited | Households | 2001 |
| Lacey Digital Ltd | Information & communication | 2026 |
| Lacuna Security Trustee Limited | Administrative & support | 2019 |
| LAD Plastering & Rendering Ltd | Construction | 2023 |
| LAD Property Ltd | Real estate | 2019 |
| LAD Wholesale Limited | Wholesale & retail | 2025 |
| Ladak Investments Ltd | Real estate | 2020 |
| Ladak Property Group Limited | Real estate | 2020 |
| Ladak Psychology Practice Ltd | Health & social care | 2020 |
| Ladi Healthcare Ltd | Health & social care | 2017 |
| Ladies Association of British Barbershop Singers | Arts & recreation | 2013 |
| Ladies Fitness Gym Ltd | Arts & recreation | 2016 |
| Ladies in Need Ltd | Hospitality | 2016 |
| Ladoo SHF Limited | Hospitality | 2023 |
| Ladr Health Ltd | Information & communication | 2025 |
| Ladron DE Guevara Pets Limited | Professional & scientific | 2022 |
| Lads Store Limited | Wholesale & retail | 2013 |
| Lady ANN Estates (Leeds) Limited | Financial services | 2022 |
| Lady Cassie Ltd | Public administration | 2021 |
| Lady Park (Leeds) Management Company Limited | Real estate | 1992 |
| Ladyship Carpets Limited | Manufacturing | 2012 |
| Ladywood Cottage Management Co. Limited | Households | 1981 |
| Ladywood Lets Ltd | Real estate | 2020 |
| Lael Foods Ltd | Manufacturing | 2025 |
| Lafane T.W Bookkeeping Practice Ltd. | Professional & scientific | 2023 |
| Lafhab Barbering Academy Ltd | Education | 2021 |
| Lafhab Hairdressing Academy Ltd | Education | 2021 |
| Laflare’S Ltd | Transport & logistics | 2025 |
| Lafrazfoodco Ltd | Hospitality | 2026 |
| Lagancroft Limited | Manufacturing | 1990 |
| Lagentium Plaza Ltd | Real estate | 2023 |
| Lagg Holdings Limited | Administrative & support | 2018 |
| Lagnersh Caravan Park Ltd | Hospitality | 2025 |
| Lagom GC Limited | Professional & scientific | 2026 |
| Lagos Alabaru Limited | Hospitality | 2025 |
| Lagree LD Ltd | Arts & recreation | 2025 |
| LAH Homes Limited | Construction | 2017 |
| LAH PUB Co Ltd | Hospitality | 2025 |
| Lahiri Properties Limited | Real estate | 2021 |
| Lahori Dhaba BD7 Limited | Hospitality | 2014 |
| Lahori Street Food Ltd | Hospitality | 2024 |
| Laidlaw (Essex) Limited | Professional & scientific | 1945 |
| Laikin Developments Limited | Administrative & support | 2019 |
| Lailas Hair & Cosmetics Ltd | Wholesale & retail | 2024 |
| Laima Financial Partners Ltd | Professional & scientific | 2026 |
| Laimis Building Ltd | Construction | 2024 |
| Laing Projects (UK) Limited | Professional & scientific | 1961 |
| Laird Electrical Contractors Ltd | Construction | 2023 |
| Laith Real Estates Ltd | Real estate | 2023 |
| Lajik Ltd | Professional & scientific | 2018 |
| Lajkonik Leeds Ltd | Wholesale & retail | 2025 |
| LAK Enterprise Limited | Professional & scientific | 2019 |
| LAK Group Holdings Limited | Financial services | 2023 |
| Lakasz J T Limited | Transport & logistics | 2015 |
| Lake Business Systems & Consultancy Ltd | Information & communication | 2015 |
| Lake Consultancy Services Ltd | Professional & scientific | 2023 |
| Lake Geneva Swimming Association Limited | Arts & recreation | 2017 |
| Lake Key Investment Limited | Real estate | 2022 |
| Lake Legal Holdings Limited | Financial services | 2023 |
| Lake Legal Limited | Professional & scientific | 2011 |
| Lake Victoria Bar and Restaurant 1 Ltd | Hospitality | 2017 |
| Lakes Consulting Limited | Professional & scientific | 2010 |
| Lakes Wellbeing Escapes Ltd | Hospitality | 2025 |
| Lakeshore Construction Maintenance Ltd | Construction | 2019 |
| Lakeside (Rawdon) Management Company (NO.3) Limited | Households | 1992 |
| Lakeside Dining Ltd | Hospitality | 2018 |
| Lakeside Holdings (Roundhay) Limited | Financial services | 2019 |
| Lakeside Ltmt Limited | Health & social care | 2024 |
| Lakha&Ikigai Ltd | Real estate | 2020 |
| Laki's Foods Limited | Wholesale & retail | 2023 |
| Laki's Ltd | Wholesale & retail | 2019 |
| Lako Fatah Ltd | Hospitality | 2025 |
| Lakscious Limited | Manufacturing | 2023 |
| Lakshmi Vinayaka Limited | Real estate | 2021 |
| Lala Nails Spa Limited | Other services | 2022 |
| Lalani &Co Ltd | Health & social care | 2013 |
| Lali Space CIC | Health & social care | 2023 |
| LAM Boutique Limited | Other services | 2015 |
| LAM Kitchen Ltd | Hospitality | 2025 |
| Lamarthur Training & Consultancy Ltd | Education | 2022 |
| Lamb Asset Management Limited | Financial services | 2018 |
| Lamba LR Properties Ltd | Real estate | 2019 |
| Lamba Properties Limited | Real estate | 1992 |
| Lambda Medical Ltd | Education | 2019 |
| Lambert Lifestyle Limited | Real estate | 2004 |
| Lambert's Yard Estates Limited | Real estate | 2019 |
| Lambert's Yard Residential Limited | Real estate | 2019 |