| Luxe Line Studio Ltd | Wholesale & retail | 2026 |
| Luxe Psychology Practice Ltd | Health & social care | 2025 |
| Luxe Tier Cleaning Limited | Administrative & support | 2025 |
| Luxfab Limited | Professional & scientific | 1989 |
| Luxnam Properties Ltd | Real estate | 2025 |
| Luxor Wood Flooring Ltd | Manufacturing | 2022 |
| Luxora Investments Limited | Real estate | 2024 |
| Luxoras Ltd | Real estate | 2025 |
| Luxpop Ltd | Wholesale & retail | 2026 |
| Luxury 4 X 4 Car Hire Limited | Administrative & support | 2019 |
| Luxury Interior Design London Limited | Construction | 2019 |
| Luxury Rentalss Ltd | Wholesale & retail | 2026 |
| Luxury Threads by Sundas Areeba Limited | Wholesale & retail | 2026 |
| Luxury Unique Choice Ltd | Wholesale & retail | 2025 |
| Luxustay Limited | Real estate | 2019 |
| LV Vehicle Solutions Ltd | Wholesale & retail | 2020 |
| LVA Transport Ltd | Transport & logistics | 2014 |
| LVC Central Limited | Financial services | 1995 |
| Lvmk Developments Ltd | Construction | 2018 |
| Lvseal Ltd | Construction | 2024 |
| LW Apart Hotel Limited | Other services | 2022 |
| LW G&F Limited | Other services | 2022 |
| LW Grace FH Limited | Other services | 2022 |
| LW IM Limited | Real estate | 2024 |
| LW IVY FH Limited | Real estate | 2018 |
| LW IVY Limited | Real estate | 2017 |
| LW Roco FH Limited | Other services | 2020 |
| LW Roco Limited | Real estate | 2020 |
| LW Rufus FH Limited | Other services | 2020 |
| LW Rufus Limited | Real estate | 2020 |
| LW Spot FH Limited | Other services | 2020 |
| LW Spot Limited | Real estate | 2021 |
| LW Team Limited | Real estate | 2024 |
| LW Wellesley FH Limited | Real estate | 2018 |
| LW Wellesley Limited | Real estate | 2018 |
| LWE Group Ltd | Construction | 2023 |
| LWJ Solutions Limited | Construction | 2019 |
| LWK Roadway System Ltd | Transport & logistics | 2025 |
| LX2 Engineering Ltd | Professional & scientific | 2024 |
| Lxplus Ltd | Health & social care | 2024 |
| LYC Coaching Services Ltd | Professional & scientific | 2019 |
| Lydctakeaway Limited | Hospitality | 2025 |
| Lydia Care Solutions Ltd | Health & social care | 2022 |
| Lydon Holdings Limited | Financial services | 2019 |
| Lydygold Intl Core Ltd | Wholesale & retail | 2023 |
| Lyjon Co. Limited | Construction | 1964 |
| LYK Venture Limited | Health & social care | 2019 |
| Lykke Global Advisors UK Ltd | Professional & scientific | 2025 |
| Lykley Developments Ltd | Real estate | 2024 |
| Lymington Limited | Real estate | 2019 |
| Lynch Group Ltd | Financial services | 2022 |
| Lynch Mechanical & Electrical Ltd | Construction | 2022 |
| Lynchris Ltd | Real estate | 2025 |
| Lyne Development Limited | Manufacturing | 1991 |
| Lynx Data Cabling Limited | Extraterritorial | 2003 |
| Lynx Networks Ltd | Information & communication | 1995 |
| Lynx Window Services Ltd | Administrative & support | 2011 |
| LYP Properties Ltd | Real estate | 2024 |
| Lyrion Ltd | Wholesale & retail | 2025 |
| Lyst Investments Ltd | Real estate | 2019 |
| Lytenes Healthcare Ltd | Health & social care | 2023 |
| Láradá Ltd. | Health & social care | 2022 |
| LÈ Tree Ltd | Agriculture & fishing | 2021 |
| M & F Tanning Limited | Other services | 2021 |
| M & G Cliffe Limited | Financial services | 2004 |
| M & J Security Services Limited | Administrative & support | 2002 |
| M & L Property Limited | Real estate | 2008 |
| M & M Removals & Storage Limited | Transport & logistics | 2004 |
| M & N Carter Consulting Limited | Construction | 2013 |
| M & N Cleaning Ltd | Administrative & support | 2016 |
| M & R Accountancy Limited | Professional & scientific | 2007 |
| M & R Autos Ltd | Wholesale & retail | 2019 |
| M & R Partnership Ltd | Professional & scientific | 2025 |
| M & R Property Holdings Limited | Real estate | 2008 |
| M & R Propertymk Limited | Real estate | 2020 |
| M & T Property Limited | Real estate | 2018 |
| M & V Projects (South) Ltd | Construction | 2010 |
| M a Healy Limited | Construction | 2001 |
| M Asare Consultancy Limited | Health & social care | 2016 |
| M B Residential Parks Limited | Wholesale & retail | 2013 |
| M Barham Carpentry Limited | Construction | 2016 |
| M Berry Caravans Limited | Wholesale & retail | 2008 |
| M Builders Trading Ltd | Construction | 2026 |
| M Burrell Consulting Limited | Professional & scientific | 2020 |
| M Cliffe Solutions Limited | Professional & scientific | 2024 |
| M D P Administration Services LLP | | 2009 |
| M Evans Holdings Limited | Financial services | 2025 |
| M F Thomas Dental Care Limited | Health & social care | 2013 |
| M Five Engineering Limited | Manufacturing | 2022 |
| M Groundworks and RC Framing Ltd | Construction | 2023 |
| M H Auto Services Ltd | Wholesale & retail | 2006 |
| M H Health Services Ltd | Health & social care | 2026 |
| M H Staniforth Limited | Hospitality | 2011 |
| M I W Construction Limited | Construction | 2008 |
| M J Carr Landscape Construction Ltd | Administrative & support | 2020 |
| M J Davey Solutions Limited | Information & communication | 2011 |
| M J Fountain Properties Limited | Real estate | 2021 |
| M J Madkins Limited | Agriculture & fishing | 2017 |
| M K Best Deal Tyres, Limited | Wholesale & retail | 2013 |
| M Lane Decorating Ltd | Construction | 2013 |