| Lorien 44 Limited | Professional & scientific | 2025 |
| Lotmove Limited | Professional & scientific | 1985 |
| Lunabay Limited | Financial services | 2013 |
| M&J Steel Services Limited | Construction | 2008 |
| M&Lw Limited | Financial services | 1984 |
| Maesbrook Limited | Construction | 2004 |
| Manek Assets Group Ltd | Real estate | 2016 |
| March Lease Advisory Services Limited | Administrative & support | 2019 |
| Marcuson Consulting Ltd | Professional & scientific | 2010 |
| Mark Hoult-Allen Consulting Ltd | Professional & scientific | 2018 |
| Market Tavern Stroud Limited | Real estate | 2014 |
| Markson Partners Limited | Professional & scientific | 2025 |
| Martin Coceres Productions Ltd | Information & communication | 2022 |
| Maunder Taylor Services Limited | Administrative & support | 2011 |
| Mayfair Development Finance (Basingstoke) Limited | Construction | 2016 |
| Mayfair Development Finance (Botley) Limited | Financial services | 2018 |
| Mayfair Development Finance (Weymouth) Limited | Financial services | 2016 |
| Mayfair Development Finance Ltd | Financial services | 2015 |
| MED 4S Ltd | Other services | 2011 |
| Meta London Ltd | Professional & scientific | 2018 |
| Mh&S Services Limited | Professional & scientific | 2025 |
| Michael Watkins Limited | Construction | 2012 |
| Mighty Eagle Productions Limited | Professional & scientific | 2021 |
| Miller Mixing Limited | Information & communication | 2014 |
| Mkcv Limited | Professional & scientific | 2015 |
| Moduloc Control Systems Limited | Other services | 1995 |
| Moneyhill Interiors Limited | Wholesale & retail | 2004 |
| Morley Stove Company Limited | Wholesale & retail | 1997 |
| Mosaik Limited | Other services | 1993 |
| MRW Media Ltd | Information & communication | 2024 |
| MT Site Staff (NO 2) Limited | Households | 2019 |
| MT Site Staff (NO 5) Limited | Households | 2019 |
| Music Life Limited | Information & communication | 2021 |
| My Property Rentals Limited | Real estate | 2018 |
| Nationalcorp (S1) Ltd | Construction | 2019 |
| Nationalcorp Limited | Construction | 2002 |
| Nick Wall Ltd | Professional & scientific | 2018 |
| Nicor Steel Ltd | Construction | 2014 |
| Niska Holdings Limited | Financial services | 2025 |
| Ogreen Limited | Professional & scientific | 2021 |
| Olley Enterprises Ltd | Professional & scientific | 2018 |
| OM Management Limited | Professional & scientific | 2025 |
| Onsource Limited | Administrative & support | 2016 |
| Opus Soul Limited | Construction | 2025 |
| Oram and Robinson Limited | Construction | 1944 |
| Origin Fenestration Limited | Professional & scientific | 2023 |
| Origin Frames Holdings Limited | Financial services | 2024 |
| Origin Leisure Limited | Construction | 1982 |
| Origin Pools Limited | Construction | 2010 |
| Origin Pools.Com Limited | Extraterritorial | 2011 |
| Oryx Door Systems Ltd | Wholesale & retail | 2020 |
| Overstrand Mansions Residents Association Limited | Households | 1980 |
| Owap Ltd | Real estate | 2013 |
| Palisander Properties Limited | Construction | 1994 |
| Pamaraspi Limited | Financial services | 2018 |
| Park Street Capital Limited | Professional & scientific | 2001 |
| Pegasus Glazing and Window Fixing Limited | Construction | 2004 |
| Pemberley Limited | Real estate | 2004 |
| PEN News Limited | Information & communication | 2017 |
| Pendant Ceiling Light Company Limited | Wholesale & retail | 2018 |
| Penina Golf Apartments Limited | Real estate | 1982 |
| Penina Trustees Limited | Extraterritorial | 2010 |
| Penygroes Holdings Limited | Professional & scientific | 2012 |
| Peter Holmes Sound Ltd | Information & communication | 2018 |
| Peter Reeve ESS Limited | Administrative & support | 2010 |
| Piglets Boutique B&B Limited | Hospitality | 2016 |
| Planideal Property Management Limited | Households | 1988 |
| Plexian BV Limited | Professional & scientific | 2021 |
| Plexian Global Solutions Limited | Extraterritorial | 2001 |
| Plexian International Limited | Wholesale & retail | 2002 |
| Polly & BOO Limited | Professional & scientific | 2020 |
| Pressure Point Limited | Manufacturing | 2018 |
| Prime UK Properties Limited | Real estate | 2003 |
| Prism Construction Limited | Construction | 2000 |
| Prism Marsworth Limited | Construction | 2014 |
| Product Finishing Limited | Manufacturing | 2004 |
| Programmeplan Ltd | Information & communication | 2022 |
| Proud 2 Present Limited | Arts & recreation | 2022 |
| Quattro Investments Limited | Real estate | 2013 |
| Queensbury New Homes Limited | Construction | 2023 |
| Queensbury ST Ippolyts Limited | Construction | 2026 |
| R Nardone & Sons Limited | Construction | 2009 |
| Real Advisory Limited | Real estate | 2007 |
| Recife Realty Limited | Professional & scientific | 1983 |
| Red Marine Limited | Wholesale & retail | 2023 |
| RK Hospitality Limited | Financial services | 2024 |
| Rock Solid Properties Limited | Real estate | 2016 |
| Rotiware Ltd | Wholesale & retail | 2020 |
| Ruddell Consultants Limited | Administrative & support | 2021 |
| RVP Enterprise Limited | Financial services | 2024 |
| Ryebridge Autos Limited | Wholesale & retail | 2018 |
| Ryebridge Aviation Limited | Construction | 2023 |
| Ryebridge Construction Limited | Administrative & support | 2014 |
| Ryebridge Group Limited | Financial services | 2014 |
| Ryebridge Motor Sports Limited | Arts & recreation | 2014 |
| Ryebridge Properties Limited | Real estate | 2024 |
| S. Barker Tree Surgery Ltd | Administrative & support | 2025 |
| Samdan Developments Limited | Real estate | 2004 |
| Sarano Properties Limited | Professional & scientific | 1983 |
| SCB Consulting Limited | Other services | 2002 |