| L J Brickwork & Construction Limited | Construction | 2013 |
| L P Projects Limited | Construction | 2015 |
| L Y G Limited | Real estate | 2023 |
| L.J.V. Consultants Limited | Information & communication | 2015 |
| LA Hampton Ltd. | Professional & scientific | 2010 |
| Lahori Nihaari London Ltd | Hospitality | 2020 |
| Lalag Sports Limited | Manufacturing | 2021 |
| Lamcy Ltd | Wholesale & retail | 2019 |
| Lamosene Limited | Wholesale & retail | 2025 |
| Lancet Ltd | Construction | 2015 |
| Landmark Build Ltd | Construction | 2014 |
| Latch Tech Limited | Construction | 2014 |
| LE Moulin Investments Limited | Real estate | 2021 |
| LE Xest Ltd | Wholesale & retail | 2025 |
| Leap HR Solutions Limited | Administrative & support | 2024 |
| Learner Group Limited | Education | 2019 |
| Learners Ltd | Information & communication | 2015 |
| Ledba Limited | Wholesale & retail | 2021 |
| Lefun Robotics Limited | Wholesale & retail | 2025 |
| Lenburg Ltd | Wholesale & retail | 2025 |
| Leyla Abdikadir Ahmed Limited | Health & social care | 2024 |
| Liam Ralph Limited | Wholesale & retail | 2024 |
| Liberated Caje Digitals Ltd | Wholesale & retail | 2026 |
| Life IS Poetic Publishing Ltd | Other services | 2020 |
| Ligufen Ltd | Wholesale & retail | 2023 |
| Limebore Ltd | Wholesale & retail | 2025 |
| Limoous Ltd | Wholesale & retail | 2025 |
| Lingobuzz Ltd | Information & communication | 2025 |
| Little Hands Daycare Limited | Health & social care | 2014 |
| Littlehands Childcare Services Ltd | Health & social care | 2019 |
| LIU Pengfei Ltd | Wholesale & retail | 2024 |
| Live Life and Grow Media Limited | Information & communication | 2021 |
| Live Topic Models Limited | Professional & scientific | 2021 |
| LJ and Sons Development Limited | Real estate | 2026 |
| LLR Construction & Developments Ltd | Construction | 2025 |
| Llsted Technologies Ltd | Information & communication | 2026 |
| Locomote UK Ltd | Wholesale & retail | 2023 |
| Logic Lovin Cowboys Ltd | Wholesale & retail | 2024 |
| Logicpromax Automation Ltd | Information & communication | 2025 |
| London Cabaret Collective Ltd | Hospitality | 2026 |
| London CON Ltd | Construction | 2022 |
| London East Limited | Real estate | 2007 |
| London Taxi Repair Centre Limited | Wholesale & retail | 2014 |
| Loop in Electrical Limited | Construction | 2018 |
| Lucaspro Solutions Private Limited | Construction | 2026 |
| Lucie Porter Consulting Limited | Administrative & support | 2016 |
| Lucie Porter Limited | Professional & scientific | 2013 |
| Lumbus Ltd | Information & communication | 2024 |
| Lumiware Ltd | Information & communication | 2025 |
| Lunater Invest Ltd | Financial services | 2025 |
| Luxe Reach Ltd | Wholesale & retail | 2025 |
| Luxexpert Ltd | Administrative & support | 2022 |
| Lynxia Assets UK Ltd | Financial services | 2026 |
| M Ahmad Durrani Limited | Administrative & support | 2026 |
| M J C S Contract Services Limited | Information & communication | 2013 |
| M&Atradeco Limited | Wholesale & retail | 2024 |
| M&S Commerce Ltd | Wholesale & retail | 2024 |
| Maanpaa International Limited | Wholesale & retail | 2026 |
| Maclaren Ross Media Ltd | Professional & scientific | 2026 |
| Madagascar Impact C.I.C. | Health & social care | 2025 |
| Madasu Limited | Professional & scientific | 2025 |
| Magma Consultants Limited | Professional & scientific | 2021 |
| Magpies DEN Limited | Real estate | 2021 |
| Magpies Estate Holdings Limited | Real estate | 2025 |
| Mahadev Digital Services Limited | Professional & scientific | 2025 |
| Mahmuda Ltd | Wholesale & retail | 2025 |
| MAI Juice Ltd | Manufacturing | 2026 |
| Majidshow Ltd | Information & communication | 2025 |
| Malisha Vaver Limited | Wholesale & retail | 2025 |
| Mandhi Souq Ltd | Hospitality | 2025 |
| Mandip Singh Construction Limited | Construction | 2018 |
| Manraj Properties Limited | Real estate | 2020 |
| Mantar Tech Limited | Information & communication | 2025 |
| Marchfield Cosulting Limited | Administrative & support | 2016 |
| Marketpen Limited | Wholesale & retail | 2024 |
| Marmore Holdings Ltd | Real estate | 2025 |
| Master Suplier Ltd | Wholesale & retail | 2025 |
| Mastergas Engineering Services Ltd | Construction | 2020 |
| Matako Consultants Limited | Information & communication | 2009 |
| Matthew French Facade Consulting Ltd | Professional & scientific | 2025 |
| Mavron Studio Ltd | Manufacturing | 2025 |
| Mayne Hype Ltd | Wholesale & retail | 2025 |
| Mays International Sourcing Ltd | Wholesale & retail | 2025 |
| MBS Ecomm Solutions Ltd | Wholesale & retail | 2026 |
| MCB Training and Assessment Limited | Administrative & support | 2015 |
| Mccann Communication Consultancy Limited | Information & communication | 2007 |
| Mcdiaura, Limited | Wholesale & retail | 2025 |
| MDD Homes Ltd | Construction | 2024 |
| Medius Marketing Ltd | Information & communication | 2025 |
| Meet Khalil Ltd | Wholesale & retail | 2025 |
| Mega Horizon Group Ltd | Wholesale & retail | 2025 |
| Mehriver Limited | Wholesale & retail | 2025 |
| Melvi Technologies Limited | Information & communication | 2011 |
| Meridian Communications Limited | Professional & scientific | 2011 |
| Meridian Compass Trading Ltd | Wholesale & retail | 2023 |
| Meridian Data Comms Limited | Information & communication | 2022 |
| Merli Outsid Limited | Wholesale & retail | 2025 |
| Metavault Limited | Information & communication | 2026 |
| MF Estores Ltd | Wholesale & retail | 2025 |
| Mfnrac Ltd | Wholesale & retail | 2025 |