| Mulberry & ASH Properties Investments Ltd | Real estate | 2023 |
| Muscle Vending Ltd | Wholesale & retail | 2024 |
| Mutris Limited | Professional & scientific | 2014 |
| MVL Wills and Trusts Limited | Professional & scientific | 2014 |
| My Virtual Friend Ltd | Information & communication | 2025 |
| Mybluedot UK Ltd | Water & waste | 2020 |
| N D Property Homes Limited | Real estate | 2026 |
| Nabbscott Business Centre Limited | Construction | 2019 |
| Nature Services Ltd. | Financial services | 2023 |
| Nature Services UK Ltd | Wholesale & retail | 2021 |
| Natureofflowers Limited | Information & communication | 2021 |
| ND Property Management Limited | Real estate | 2020 |
| Nemesis CGI Limited | Information & communication | 1998 |
| Nest Property Services Limited | Hospitality | 2005 |
| Newbridge Digital Limited | Administrative & support | 2018 |
| Newgale Landscapes Limited | Administrative & support | 2015 |
| Next Hospitality Group Ltd | Arts & recreation | 2018 |
| Ninfield Bonfire Company | Arts & recreation | 2009 |
| Nmsa Tennis Ltd | Arts & recreation | 2015 |
| Normanhurst Estate Company Limited | Real estate | 1999 |
| Novelty Web Solutions Ltd | Other services | 2024 |
| Nuude Tanning & Aesthetics Ltd | Other services | 2026 |
| Oakhurst Marketing Associates Ltd | Professional & scientific | 2022 |
| Oaklands Fertilizer Consultants Ltd | Agriculture & fishing | 2018 |
| Oakley Interiors (South East) Ltd | Construction | 2012 |
| Oakshill Leisure Ltd | Wholesale & retail | 2022 |
| OCG Consulting Ltd | Administrative & support | 2019 |
| OIL & GAS Solutions Limited | Professional & scientific | 2004 |
| Old Mill Walk Management Company Ltd | Households | 2001 |
| Oldbury Farm LLP | | 2005 |
| Omni Health POD Limited | Health & social care | 2024 |
| Option Drift Limited | Wholesale & retail | 2024 |
| Optix Events LLP | | 2011 |
| Orchard Landscapes Limited | Administrative & support | 2009 |
| P&L Property Holdings Ltd | Real estate | 2024 |
| Paladine Partners Ltd | Real estate | 2023 |
| Palmia Ltd | Wholesale & retail | 2023 |
| Parker and SON Plumbing Ltd | Construction | 2021 |
| Pastworld Ltd | Information & communication | 2008 |
| Patrick Townsend Stone Limited | Construction | 2006 |
| Paul Stripp Estate Agent Limited | Real estate | 2020 |
| Paulo Santos Equestrian Academy Limited | Other services | 2024 |
| Paws N Claws RYE Ltd. | Wholesale & retail | 2016 |
| Penshurst Fuels Ltd | Wholesale & retail | 2021 |
| Personalize IT! Limited | Wholesale & retail | 2018 |
| Petergower Limited | Information & communication | 2004 |
| Petley Wood Equestrian and Leisure Limited | Arts & recreation | 2009 |
| Phaedra Susans Limited | Information & communication | 2018 |
| Pharma Information & Reports Limited | Professional & scientific | 2008 |
| Phil Chambers Velocity Angling Ltd | Agriculture & fishing | 2011 |
| PHL Mobile Welding Ltd | Manufacturing | 2026 |
| Pinot Insomnia Ltd | Administrative & support | 2015 |
| Plant Hire Sussex Limited | Construction | 2020 |
| Plumb FIX Ltd | Construction | 2023 |
| Pods Products Limited | Wholesale & retail | 2013 |
| Pogue and Sons Limited | Information & communication | 2022 |
| Polecat Properties Ltd | Real estate | 2010 |
| Pond Willow Maintenance Limited | Households | 1969 |
| Povey Properties and Developments Limited | Construction | 2023 |
| Powerup Learning Ltd | Education | 2020 |
| Praefectus Well Supervision Limited | Mining & quarrying | 2015 |
| Pretty in Blush Limited | Wholesale & retail | 2012 |
| Prior & Sons Ltd | Administrative & support | 2022 |
| Prism EBC Limited | Professional & scientific | 2014 |
| Pro-Fix Solutions Limited | Construction | 2014 |
| Proficient Plumbing & Heating Ltd | Construction | 2014 |
| Promantle Limited | Professional & scientific | 2004 |
| Prosper PR Limited | Other services | 2014 |
| Public Relations Communications Association Limited | Professional & scientific | 1969 |
| Pure Art Events Ltd | Other services | 2024 |
| Pure Arts Limited | Arts & recreation | 2011 |
| Purple COW Office Supplies LLP | | 2011 |
| PVH Property (1) Ltd | Financial services | 2024 |
| PVH Property (2) Ltd | Real estate | 2024 |
| Quantum Cards TCG Ltd | Wholesale & retail | 2025 |
| Quiddity Media Limited | Arts & recreation | 2003 |
| R and M Fencing Ltd | Construction | 2019 |
| R Sharp Construction LLP | | 2024 |
| R Winchester & SON Limited | Wholesale & retail | 2011 |
| Racing Snail Productions Limited | Arts & recreation | 2006 |
| Rapid Response Transits Ltd | Transport & logistics | 2025 |
| RAY Warner Limited | Information & communication | 2012 |
| Raybell Limited | Administrative & support | 2022 |
| Rday Property Ltd | Construction | 2020 |
| RDC Property Development Ltd | Construction | 2015 |
| Red Button Development Limited | Professional & scientific | 2013 |
| Red FOX Produces Ltd | Other services | 2021 |
| Red Squirrel Battle Limited | Hospitality | 2014 |
| Redman Warriner Limited | Information & communication | 2005 |
| Redmond SFX and Engineering Services Ltd. | Administrative & support | 2018 |
| Renovo Southeast Limited | Manufacturing | 2023 |
| Rentree Limited | Administrative & support | 2023 |
| Resin Bonded Slab Company Ltd | Administrative & support | 2009 |
| Rette Farm Holdings Limited | Financial services | 2021 |
| Rette Farm Project Limited | Agriculture & fishing | 2021 |
| RG Sanles Acoustics Limited | Professional & scientific | 2015 |
| Riko's Services Ltd | Construction | 2018 |
| Rikos Reselling Ltd | Wholesale & retail | 2020 |
| Ripley Forge and Fireplaces Limited | Manufacturing | 2010 |
| Rising Brightly Ltd | Professional & scientific | 2020 |