| Lodgebank Limited | Administrative & support | 2010 |
| London Caviar Company Ltd | Wholesale & retail | 2021 |
| London Diving Chamber (2009) Ltd | Extraterritorial | 2009 |
| London Diving Chamber Ltd | Health & social care | 2004 |
| Lotus Pharms Limited | Wholesale & retail | 2019 |
| Lovett Services Ltd | Manufacturing | 2022 |
| LP Bakehouse Ltd | Manufacturing | 2026 |
| LP Walters Ltd | Arts & recreation | 2019 |
| Lucky Foods (UK) Ltd | Manufacturing | 2003 |
| LUV Learning Limited | Education | 2021 |
| Luxor Residences Ltd | Real estate | 2021 |
| Luxsh Technologies Limited | Information & communication | 2019 |
| M&J Finance Ltd | Financial services | 2025 |
| MA Law Consultants Ltd | Professional & scientific | 2019 |
| Madhvani International Ltd | Professional & scientific | 2015 |
| Manor House School Ltd | Education | 2026 |
| Manu Investments Limited | Real estate | 2016 |
| Maple Lodge Limited | Health & social care | 2026 |
| Marlap Ltd | Information & communication | 2021 |
| Matai Properties Ltd | Real estate | 2019 |
| Matai Stone Ltd | Construction | 2014 |
| Maytas Ltd | Construction | 2016 |
| MBH (Berkshire) Limited | Professional & scientific | 2020 |
| Mediclear Camouflage & Lesion Removal Ltd | Other services | 2020 |
| Merbar Ltd | Real estate | 2007 |
| Merciful Deeds Ltd | Hospitality | 2020 |
| Mercury W12 Ltd | Extraterritorial | 2013 |
| Metric London Limited | Administrative & support | 2013 |
| Midlands Diving Chamber Ltd | Health & social care | 2008 |
| Milebank Limited | Professional & scientific | 2006 |
| Milestone Properties UK Limited | Real estate | 2008 |
| Mimi Doctor Limited | Professional & scientific | 2015 |
| Minton Brewery Court Limited | Real estate | 2015 |
| Minton Commercial Estates Limited | Real estate | 2018 |
| Minton Commercial Properties Limited | Real estate | 2002 |
| Minton Corre Limited | Financial services | 2021 |
| Minton Group Limited | Real estate | 1995 |
| Minton Northampton LLP | | 2006 |
| Minton Oldbury Limited | Real estate | 2001 |
| Mirza Group Travel Ltd | Administrative & support | 2023 |
| Mishimi Limited | Financial services | 2010 |
| MO Khao Properties Ltd | Real estate | 2026 |
| Monticola Consulting Limited | Professional & scientific | 2015 |
| Moss Lodge Properties Ltd | Households | 2017 |
| Motion Grips London Ltd | Information & communication | 2019 |
| MPC 24 Ltd | Other services | 2023 |
| Mulla & Co Ltd | Professional & scientific | 2011 |
| Munroz Limited | Real estate | 2004 |
| Munroz Properties Limited | Real estate | 2016 |
| MW Global Couriers Limited | Transport & logistics | 2008 |
| Mysterious Rebel Pictures Limited | Information & communication | 2019 |
| Nazir Group One Ltd | Real estate | 2023 |
| Ndsd Investments Holding Ltd | Real estate | 2020 |
| Neil Corbould Special Effects Limited | Information & communication | 2000 |
| Nesw Solutions Ltd | Professional & scientific | 2019 |
| New DMC LLP | | 2010 |
| New Key Designs Limited | Professional & scientific | 2008 |
| Newdell Limited | Real estate | 2015 |
| Newville Investments Limited | Real estate | 2016 |
| Nextgen Car Limited | Extraterritorial | 2021 |
| Nicole Chapman Fitness Ltd | Arts & recreation | 2022 |
| Nicole Chapman Ltd | Information & communication | 2014 |
| Nimko Limited | Wholesale & retail | 2007 |
| Nixon Flux Ltd | Financial services | 2025 |
| Novalgen Limited | Professional & scientific | 2018 |
| Novalgen Newco Limited | Administrative & support | 2019 |
| Novaria Services Ltd | Extraterritorial | 2017 |
| Novastra Limited | Real estate | 2014 |
| NU Distribution Ltd | Transport & logistics | 2012 |
| Nusselt Consulting Ltd | Information & communication | 2011 |
| Nvg-Engager Limited | Extraterritorial | 2021 |
| NVP Consultancy Limited | Professional & scientific | 2019 |
| Oak Leasing Limited | Financial services | 1992 |
| Oak Tree House Care Limited | Health & social care | 2019 |
| OCK Street Practice Ltd | Financial services | 2021 |
| ON Screen Publishing Limited | Information & communication | 2015 |
| One Step Homes Ltd | Real estate | 2017 |
| Onming Ltd | Other services | 2013 |
| ONS London Limited | Health & social care | 2019 |
| Origin Export House Limited | Wholesale & retail | 2022 |
| Osca Properties Limited | Real estate | 2024 |
| Osprey Mews Freehold Limited | Households | 2021 |
| Oxour Management Services Limited | Professional & scientific | 2019 |
| P&B Wealth Planning Limited | Professional & scientific | 2018 |
| P3 Asset Investment Limited | Real estate | 2018 |
| P4 Investments Limited | Real estate | 2005 |
| P7 Investments London Ltd | Construction | 2021 |
| Parmex Limited | Wholesale & retail | 1978 |
| Path to Performance Ltd | Professional & scientific | 2021 |
| Pearce and Plenty Capital Ltd | Financial services | 2025 |
| Peregrine & Black Investment Management Limited | Financial services | 2015 |
| Perks Direct Limited | Information & communication | 2020 |
| PGC Management Limited | Real estate | 2014 |
| Picture Property Developments LLP | | 2014 |
| Pine Lodge Care Limited | Health & social care | 2026 |
| Pinnacle Fire & Electrical Limited | Other services | 2011 |
| Planet Pyrite Limited | Administrative & support | 2019 |
| PM Medical Services Ltd | Health & social care | 2025 |
| Polygon Communications Ltd | Professional & scientific | 2011 |
| Potter ST Hill ASC Ltd | Health & social care | 2018 |