| Moav Ltd | Administrative & support | 2025 |
| Moli Barbers Ltd | Other services | 2025 |
| Mopane & Co (South West) Limited | Real estate | 2015 |
| Morgwn Atkins Limited | Professional & scientific | 2002 |
| Morning Star Consulting Limited | Other services | 2011 |
| Motley Estates Ltd | Real estate | 2019 |
| Motoiva Ltd | Wholesale & retail | 2022 |
| Motti Events Ltd | Hospitality | 2025 |
| Mowles Construction Ltd | Construction | 2010 |
| Mowles Developments Ltd | Construction | 2010 |
| Mowles Farms Ltd | Agriculture & fishing | 2010 |
| Mowles Group Ltd | Financial services | 2023 |
| Mpandaguta Consulting Limited | Professional & scientific | 2025 |
| Mphs Group Limited | Extraterritorial | 2017 |
| MRB Developments Ltd | Real estate | 2021 |
| MSJ Ballooning Limited | Arts & recreation | 2011 |
| Muirson Consulting Limited | Professional & scientific | 2022 |
| Mulberry Design Studio Limited | Information & communication | 2018 |
| Mulberry Hypnotherapy Limited | Health & social care | 2021 |
| Muse Sculpture Limited | Wholesale & retail | 2022 |
| Mutton Enterprises Ltd | Education | 2020 |
| Mxmse Ltd | Wholesale & retail | 2024 |
| My Small Space Limited | Professional & scientific | 2014 |
| Myhiringnet Ltd | Professional & scientific | 2009 |
| Nadiotis & Co Limited | Professional & scientific | 2025 |
| Naicker Scientific Ltd | Manufacturing | 2021 |
| Nailsworth Carpets Limited | Wholesale & retail | 2002 |
| Nationwide Food Systems Limited | Manufacturing | 2011 |
| Natural Polymers Group Limited | Other services | 2025 |
| Nefarious BAT Press LLP | | 2024 |
| Neil J. Whitehorn Limited | Information & communication | 2019 |
| Newent Developments Limited | Construction | 2021 |
| Newhawk Services Ltd | Information & communication | 2023 |
| Newsham Homes Limited | Real estate | 2007 |
| Nichols Farming Limited | Agriculture & fishing | 2017 |
| Nick Miners Limited | Professional & scientific | 2011 |
| Nine Project Consultants Limited | Construction | 2022 |
| Nise Limited | Real estate | 2017 |
| NLM Management Services Limited | Professional & scientific | 2025 |
| NO. 11 the Gallery Tetbury Ltd | Wholesale & retail | 2025 |
| NO.1 Arundel Gardens Limited | Households | 1987 |
| Nomad Ideas Ltd | Wholesale & retail | 2021 |
| Nombans Limited | Professional & scientific | 1958 |
| Nordic Lift Installations Ltd | Construction | 2018 |
| Nordic Lift Modernisations Ltd | Construction | 2018 |
| Nordic Lifts Limited | Administrative & support | 2018 |
| Norton Folgate Almshouses | Hospitality | 2025 |
| Ny-Lon Marketing Ltd | Professional & scientific | 2008 |
| Oakfield Design and Creation Ltd. | Other services | 2016 |
| Oakley Learning Ltd | Professional & scientific | 2007 |
| Oakwood Van Hire Limited | Administrative & support | 2014 |
| Omarics Ltd | Information & communication | 2025 |
| One Oxford ST (Estates) Ltd | Extraterritorial | 2022 |
| One Stop Software Limited | Wholesale & retail | 2007 |
| Onside Consulting Limited | Professional & scientific | 2016 |
| Operandiem INT. Limited | Professional & scientific | 2023 |
| Oriel's Ltd. | Professional & scientific | 2019 |
| Orient AIT Advisory Limited | Administrative & support | 2022 |
| Original IT Solutions Ltd | Professional & scientific | 2003 |
| Osprey Partners Limited | Real estate | 2016 |
| Osprey Property Holdings Limited | Real estate | 2017 |
| Outdoor Enterprisese Limited | Wholesale & retail | 2025 |
| Outsiders Auto Ltd | Wholesale & retail | 2019 |
| Oxford Spires Property Management Limited | Real estate | 2018 |
| OY Limited | Administrative & support | 2004 |
| P M Roofing Limited | Construction | 2006 |
| P&P Resources Ltd | Professional & scientific | 2020 |
| Painter Holdings Limited | Financial services | 2026 |
| Parmiter's Almshouse and Pension Charity Ltd | Hospitality | 2003 |
| PAS Development (Wilts) Limited | Administrative & support | 2011 |
| Paul Beard Limited | Construction | 2012 |
| Paul Wood Management Consulting Ltd | Extraterritorial | 2013 |
| Pelican AG Ltd | Professional & scientific | 2021 |
| Pembridge Orange Ltd | Real estate | 2019 |
| Penny Property Management Limited | Real estate | 2024 |
| Penzias House Freehold Limited | Real estate | 2023 |
| People & HR Solutions Limited | Administrative & support | 2024 |
| Persephone Rose Property Ltd | Real estate | 2026 |
| Peter Rowland Education Limited | Other services | 2014 |
| Petiscos Tetbury Ltd | Hospitality | 2020 |
| PGS Technical Ltd | Other services | 2014 |
| Phase 2 Enterprises Limited | Real estate | 2001 |
| Pheasant and Partridge Enterprises Limited | Arts & recreation | 2013 |
| Philip B Ward Limited | Construction | 2018 |
| Phoenix & Bradley Ltd | Professional & scientific | 2013 |
| PHYSIOTHERAPY3 Limited | Health & social care | 2020 |
| Pietra Ltd | Construction | 2005 |
| Pietra Wood and Stone Ltd | Wholesale & retail | 2017 |
| Pilates Plus Limited | Administrative & support | 2010 |
| Pink Jungle Ltd | Wholesale & retail | 2023 |
| PIP Morris Interiors Limited | Professional & scientific | 2022 |
| Pixie Lock Ltd | Administrative & support | 2013 |
| Placehold Productions Ltd | Arts & recreation | 2024 |
| Planet SFX Limited | Administrative & support | 2024 |
| Plant Academy Ltd | Hospitality | 2018 |
| Plants & Colour Limited | Arts & recreation | 2024 |
| Plastic Engineering EOT Trustee Limited | Manufacturing | 2022 |
| Plastic Engineering Solutions Limited | Manufacturing | 1997 |
| Platinum Feather Consultants Limited | Wholesale & retail | 1999 |
| PM Corporation Limited | Manufacturing | 1985 |