| Masayume Asset Management Ltd | Administrative & support | 2016 |
| Matome GP Limited | Health & social care | 2012 |
| Maya Innovations Ltd | Information & communication | 2021 |
| Mazur Enterprises Limited | Transport & logistics | 2012 |
| Mazza Consulting Services Limited | Professional & scientific | 2019 |
| MCG Roofing Contractors Ltd | Construction | 2025 |
| MCG Training Ltd | Education | 2013 |
| Mcgovern and Daughters Property Limited | Real estate | 2022 |
| MDE Accountancy Ltd | Professional & scientific | 2017 |
| Medexp Consulting Limited | Professional & scientific | 2017 |
| MHH 2018 Limited | Financial services | 2018 |
| Miah's Tandoori Limited | Hospitality | 2025 |
| Mihell Associates Limited | Financial services | 2013 |
| Miniwitch Leisure Limited | Professional & scientific | 2008 |
| Mitakshara Chaudhary Limited | Professional & scientific | 2025 |
| MJL International Freight Services Limited | Transport & logistics | 2001 |
| MKD Equestrian Services Limited | Administrative & support | 2016 |
| Mkea Sonography Limited | Health & social care | 2024 |
| Mlqe Ltd | Information & communication | 2025 |
| Molinar Ltd | Construction | 2017 |
| Montague Consultancy International Limited | Professional & scientific | 2020 |
| Morley’S Car Body Repairs Ltd | Manufacturing | 2025 |
| Morris DL Limited | Real estate | 2022 |
| Mortlocks Waste Limited | Water & waste | 2014 |
| Movers Advantage Limited | Information & communication | 2021 |
| MQA Resourcing Ltd | Professional & scientific | 2022 |
| MR Fuse Ltd | Construction | 2025 |
| MSA Carpets Limited | Other services | 2007 |
| MVD Homes Ltd | Real estate | 2019 |
| MZ Lilly Property LLP | | 2016 |
| MZA Heaven Ltd | Wholesale & retail | 2025 |
| N & Z Foods Ltd | Hospitality | 2025 |
| Nanogiants Ltd | Information & communication | 2021 |
| NAS Operations Ltd | Administrative & support | 2025 |
| Nash Builders Ltd | Real estate | 2026 |
| National Grocers Benevolent Fund | Other services | 2002 |
| Nationwide Building Limited | Construction | 2020 |
| Natural YOU Beauty by Theresa Ltd | Other services | 2016 |
| Nawab Indian Restaurant Ltd | Hospitality | 2019 |
| Needlejuice Ltd | Other services | 2024 |
| Neighbours Brick & Build Limited | Construction | 2026 |
| Neoteric Clinical Solutions Ltd | Professional & scientific | 2016 |
| Nettpaye Limited | Professional & scientific | 2012 |
| NEW2MARKET Limited | Professional & scientific | 2008 |
| Nextphon Ltd | Wholesale & retail | 2026 |
| Nexumspace Limited | Information & communication | 2025 |
| Nigel Giles Signalling Services Limited | Information & communication | 2000 |
| Nine Hours Ltd | Professional & scientific | 2024 |
| NK Hair Ltd | Other services | 2021 |
| NN Active Capital Ltd | Financial services | 2022 |
| Noble Installation and Maintenance Ltd | Construction | 2026 |
| Norgehygge Ltd | Real estate | 2025 |
| North Shore Advisory Ltd | Professional & scientific | 2025 |
| NP Strategic Consulting Ltd | Professional & scientific | 2026 |
| NPM Wealth Management Limited | Financial services | 2015 |
| NRB Holdings Ltd | Real estate | 2016 |
| Nuface Aesthetics Clinic Ltd | Other services | 2020 |
| Nuhair Limited | Other services | 2019 |
| Numbers Made Easy Limited | Professional & scientific | 2018 |
| Nurture Childrens Occupational Therapy Ltd | Health & social care | 2024 |
| Oakwood Quarry Solutions Ltd | Professional & scientific | 2025 |
| Oakwood Serviced Apartments Ltd | Real estate | 2024 |
| Obsidian Edge Limited | Other services | 2024 |
| ODI Solutions Limited | Information & communication | 2013 |
| OH Coaching Ltd | Education | 2025 |
| Omnia Angels Ltd | Professional & scientific | 2026 |
| One Stop Accounting Services & Solutions Limited | Professional & scientific | 2006 |
| Orange Investments Holdings Limited | Professional & scientific | 2023 |
| Orchid and Knight Limited | Real estate | 2020 |
| Orestek Limited | Construction | 2024 |
| Othendee Ltd | Real estate | 2022 |
| Outlook Roofing & Building Services Ltd | Construction | 2023 |
| Outlook Roofing and Property Maintenance Limited | Construction | 2022 |
| Overload PR Limited | Professional & scientific | 2016 |
| Owlsmoor PRE School CIC | Administrative & support | 2002 |
| P & F Designs Ltd | Wholesale & retail | 2023 |
| P & J Consultants Limited | Professional & scientific | 2003 |
| P B J Engineering Services Ltd | Construction | 2014 |
| P&R Installations Company (Southern) Ltd | Construction | 2024 |
| PAGE5000 Ltd | Information & communication | 2010 |
| Pakamisa Network Installation Limited | Administrative & support | 2025 |
| Palladian Electronics Limited | Professional & scientific | 1996 |
| Papa Johns Pizza (Sandhurst) Limited | Hospitality | 2011 |
| Parallel Wireless UK Limited | Professional & scientific | 2013 |
| Partyworld(Sandhurst) Limited | Wholesale & retail | 2019 |
| Pasa Property Ltd | Real estate | 2023 |
| Patandi Holdings Limited | Other services | 2023 |
| Patell Ltd | Construction | 2026 |
| Paten (UK) Limited | Administrative & support | 2012 |
| Paxton Padel Ltd | Real estate | 2025 |
| PCP Asset Management Limited | Administrative & support | 2017 |
| PE Science UK Ltd | Wholesale & retail | 2021 |
| Pebels Limited | Real estate | 2020 |
| Peetopoly Limited | Real estate | 2022 |
| Pegasus Travel Services Limited | Administrative & support | 2005 |
| Personal Mobility Group Limited | Extraterritorial | 2007 |
| Personal Mobility Limited | Extraterritorial | 2007 |
| Personal Mobility Solutions Limited | Wholesale & retail | 2002 |
| Peter Cole Consulting Ltd | Other services | 2016 |
| Phoenix Archangel Limited | Professional & scientific | 2018 |