| Maserati Owners Club UK Limited | Arts & recreation | 2025 |
| Matt's Wraps Ltd | Wholesale & retail | 2019 |
| Matty Moon Electrical Ltd | Construction | 2024 |
| MAX Frederick Ltd | Wholesale & retail | 2025 |
| Maxwellclarke Ltd | Professional & scientific | 2018 |
| Mcvicar International Ltd | Transport & logistics | 2024 |
| Mechania Consultancy Ltd | Professional & scientific | 2024 |
| Meha Automotive UK Ltd | Manufacturing | 2019 |
| Mellors Construction Management Ltd | Professional & scientific | 2025 |
| Mereview Properties Ltd | Construction | 2013 |
| Mereview Property Rentals Ltd | Real estate | 2014 |
| Meta Car Parts Ltd | Wholesale & retail | 2022 |
| Metrobiz Ltd | Wholesale & retail | 2018 |
| MF FFF Coaching LLP | | 2025 |
| MI Car Parts Ltd | Wholesale & retail | 2021 |
| Michelaine Ltd | Transport & logistics | 2026 |
| Midsomer Farm Ltd | Agriculture & fishing | 2025 |
| Military & Outdoor Ltd | Wholesale & retail | 2013 |
| Mining JOB Club Ltd | Information & communication | 2025 |
| Mint Octopus Ltd | Professional & scientific | 2013 |
| Miramar Engineering Ltd | Construction | 2015 |
| Miramar Holdings Ltd | Professional & scientific | 2017 |
| Miramar Projects Ltd | Professional & scientific | 2017 |
| Mitchells Contracting Limited | Transport & logistics | 2025 |
| MJW Classics Ltd | Wholesale & retail | 2024 |
| Molo Films Limited | Administrative & support | 2004 |
| Monpet Extrusion Limited | Manufacturing | 2022 |
| Moore Than Developments Ltd | Construction | 2023 |
| Morgan Miller Ltd | Manufacturing | 2025 |
| Mort and Munro Limited | Administrative & support | 2017 |
| Moto Exhausts Ltd | Wholesale & retail | 2023 |
| Msge Properties Limited | Construction | 2016 |
| N & P Allpress Limited | Agriculture & fishing | 2013 |
| N B Carpentry Limited | Construction | 2008 |
| NAK Property Holdings Limited | Real estate | 2017 |
| Nanas Tearooms Chatteris Limited | Hospitality | 2020 |
| Nbiggs Ltd | Transport & logistics | 2025 |
| Neris Foods Ltd | Wholesale & retail | 2012 |
| Nevern Consultancy Ltd | Professional & scientific | 2024 |
| Nightlayer Leek Company Ltd. | Agriculture & fishing | 1987 |
| Nmda Consulting Ltd | Health & social care | 2019 |
| Nobledee Ltd | Health & social care | 2024 |
| Nordic Green Limited | Hospitality | 1997 |
| Norfolk Wifi Ltd | Extraterritorial | 2022 |
| Ogston Kitchen Installations Ltd | Manufacturing | 2026 |
| Olivija Beauty Salon Ltd | Other services | 2013 |
| Ollie Clay Contracting Ltd | Professional & scientific | 2026 |
| Online Character Trading Ltd | Wholesale & retail | 2023 |
| Onyx Building Products Ltd | Construction | 2017 |
| Orcus Safety Limited | Administrative & support | 2009 |
| Origin Bargains Direct Ltd | Wholesale & retail | 2026 |
| Othersidecad Ltd | Information & communication | 2023 |
| Oxbridge Health Ltd. | Health & social care | 2015 |
| Papillon Procurement Ltd | Administrative & support | 2019 |
| PAR Films Limited | Information & communication | 2011 |
| Paragon Imaging Ltd | Health & social care | 2022 |
| Parasole Limited | Agriculture & fishing | 2013 |
| Pari Passu Consulting Limited | Professional & scientific | 2016 |
| Parkhall Pre-School Ltd | Education | 2021 |
| Pasta'Moré Ltd | Hospitality | 2025 |
| Paul Edwards (Cambridge) Limited | Education | 2016 |
| Pawfect Boss Boutique Limited | Wholesale & retail | 2021 |
| PB Development Residential Management SPV. Ltd | Real estate | 2026 |
| PB Developments & Investments Ltd | Construction | 2018 |
| Perce Baxter & SON Ltd | Construction | 2011 |
| Pfoa Training Services Ltd | Administrative & support | 2018 |
| Pfoa Welfare Services Ltd | Administrative & support | 2015 |
| Phase 3 Property Services Ltd | Construction | 2021 |
| Phoenix Partnership (Financial Services) Limited | Financial services | 2003 |
| Pilgrim Pumps Limited | Wholesale & retail | 2014 |
| PK Investments (Kent) Limited | Construction | 2025 |
| Plexsus Consulting Services Limited | Professional & scientific | 2002 |
| Polyglot Resources League Ltd | Information & communication | 2020 |
| Pooley Plant Hire Ltd | Construction | 2007 |
| Praefectura Limited | Professional & scientific | 2018 |
| Prize-Guyz Ltd | Wholesale & retail | 2025 |
| Propertybox UK Limited | Real estate | 1999 |
| PS Electrical Wholesale Ltd | Wholesale & retail | 2013 |
| Psychological Services UK Limited | Professional & scientific | 2007 |
| Purebaitconcepts Ltd | Wholesale & retail | 2020 |
| Pureforge Ltd | Manufacturing | 2026 |
| Putnoe Transport Limited | Transport & logistics | 2009 |
| Puzzles and Play Ltd | Wholesale & retail | 2013 |
| Queensferry Cars Showroom Limited | Wholesale & retail | 2021 |
| Qugao Limited | Professional & scientific | 2015 |
| R & L Hall Ltd | Financial services | 2024 |
| R B Grab Hire Limited | Water & waste | 2016 |
| R B Metals Limited | Water & waste | 2018 |
| R V Electrical (Cambs) Limited | Construction | 2019 |
| R Young and Sons French Polishing Ltd | Other services | 2006 |
| R.A.M Fabrication Services Ltd | Manufacturing | 2025 |
| Ramsey Care and Community Services Limited | Other services | 2011 |
| RC Recruitment Ltd | Administrative & support | 2021 |
| Reem Associates Ltd | Health & social care | 2015 |
| Reliability Support Services Ltd | Professional & scientific | 2026 |
| Retro Rides of Norfolk Ltd | Administrative & support | 2023 |
| Revolutionchange Ltd | Health & social care | 2017 |
| Reyna Distribution Ltd | Wholesale & retail | 2025 |
| Ricadene Dachshund Ltd | Agriculture & fishing | 2017 |
| RIN FIX Limited | Administrative & support | 2017 |