| North Grove Interiors Ltd | Construction | 2024 |
| North Hill Property Ltd | Administrative & support | 2017 |
| North Lodge Management Ltd | Households | 2012 |
| Nouvo Limited | Wholesale & retail | 2021 |
| Novelpets Limited | Information & communication | 2024 |
| Nurture Pet Health Limited | Professional & scientific | 2006 |
| Nutmeg Projects Limited | Construction | 2015 |
| Nyflo Mechanical Services Ltd | Professional & scientific | 2022 |
| Oakhill Brewery Limited | Administrative & support | 2002 |
| Oakhill Brewery Management Ltd | Real estate | 2014 |
| Oatley Construction Ltd | Construction | 2010 |
| Oberoi Toller Ltd | Administrative & support | 2025 |
| Occam Group Ltd | Professional & scientific | 2019 |
| Occupational Training Solutions Limited | Education | 2006 |
| Ocean Ribs Limited | Manufacturing | 2022 |
| ODD Crops CIC | Agriculture & fishing | 2026 |
| ODF Limited | Professional & scientific | 2004 |
| OE 555 Limited | Hospitality | 2023 |
| OHS OIL Heating Services Ltd | Construction | 2017 |
| Ojpr Holdings Limited | Financial services | 2025 |
| Ollie Wain Carpentry & Joinery Ltd | Construction | 2014 |
| Ollyslollys Ltd | Wholesale & retail | 2023 |
| Olmo Land Management Ltd | Agriculture & fishing | 2020 |
| One Destiny Ltd | Extraterritorial | 2013 |
| One Good Thing Trading Ltd | Wholesale & retail | 2020 |
| One Home Climate Solutions | Professional & scientific | 2023 |
| Onecando Limited | Information & communication | 2017 |
| Oneroof Holdings Ltd | Wholesale & retail | 2025 |
| Operation Orbis Ltd | Wholesale & retail | 2019 |
| Orchard Crest Developments Limited | Construction | 2007 |
| Orchard Developments (Somerset) Ltd | Construction | 2018 |
| Orchard Isle Nutrition Ltd | Health & social care | 2020 |
| Orchard Vale Social Enterprises CIC | Hospitality | 2018 |
| Orchard Vale Trust Limited | Health & social care | 1985 |
| ORE Events (South West) Ltd | Extraterritorial | 2009 |
| Organics Music Ltd | Arts & recreation | 2025 |
| Origin Oxygen Ltd | Health & social care | 2022 |
| Osborne & Osborne Ltd | Real estate | 2020 |
| Oscar Property Limited | Real estate | 2017 |
| Owen Montgomery Consulting Ltd | Administrative & support | 2026 |
| P .W. Keen & SON Ltd | Agriculture & fishing | 2025 |
| P a Hanlan Ltd | Professional & scientific | 2018 |
| P Hurst Carpentry Limited | Manufacturing | 2022 |
| P R Jeenes Agri-Business Consulting Limited | Professional & scientific | 1999 |
| P R Marketing & Sales Limited | Professional & scientific | 2003 |
| P. M Interim Solutions Limited | Professional & scientific | 2001 |
| Packaging Consulting Global Limited | Other services | 2021 |
| Paddock Hill Consulting Limited | Professional & scientific | 2021 |
| Painless Grainless Ltd | Hospitality | 2025 |
| Paint Shop Boys Limited | Construction | 2023 |
| Palace Enterprises (Wells) Limited | Arts & recreation | 1995 |
| Palace Farms Limited | Agriculture & fishing | 2006 |
| Palsupport (UK) Limited | Extraterritorial | 2016 |
| PAN Global Products and Services Ltd | Manufacturing | 2019 |
| Paolo Bollini Architects Limited | Professional & scientific | 2010 |
| Paper Tiger Printing Limited | Manufacturing | 2002 |
| Paranoid Network Ltd | Information & communication | 2019 |
| Park Court (Lyham Road) Management Limited | Households | 2001 |
| Park Home Improvements (Wessex) Limited | Construction | 2014 |
| Party Packs Holdings Limited | Administrative & support | 2018 |
| Party Packs Limited | Wholesale & retail | 2008 |
| Patel Assets Ltd | Real estate | 2024 |
| Patel Property Assets Ltd | Real estate | 2020 |
| Paul Makin (U.K.) Ltd | Education | 2013 |
| Payroll Specialists Limited | Administrative & support | 2008 |
| PBH Rentals Limited | Real estate | 2018 |
| PBM Storage Ltd | Administrative & support | 2025 |
| Peach Tree Homes Ltd | Real estate | 2016 |
| Pearce and Fletcher Ltd | Construction | 2020 |
| Pebble Money Limited | Administrative & support | 2017 |
| Peers Reclamation Limited | Wholesale & retail | 2018 |
| Peloryx Ltd | Wholesale & retail | 2025 |
| PEN TOR Mead Management Ltd | Households | 2019 |
| Pendulum Power Connections Ltd | Construction | 2023 |
| Pendulum Power Consultants Ltd | Professional & scientific | 2021 |
| Pendulum Power Contracting Ltd | Extraterritorial | 2023 |
| Pendulum Power Earthing Ltd | Professional & scientific | 2024 |
| Pendulum Power Group Ltd | Financial services | 2024 |
| Penelope Perry Ltd | Real estate | 2021 |
| Pengelly Bioenergy Ltd | Real estate | 2014 |
| Pengelly Energy Limited | Energy | 2013 |
| Pengelly Farms Limited | Agriculture & fishing | 2004 |
| Pennard Farms Limited | Agriculture & fishing | 2003 |
| Pennybatch Ltd | Manufacturing | 2022 |
| Pentle Consulting Limited | Real estate | 2017 |
| People Places Things Ltd | Professional & scientific | 2026 |
| Perfect Aurora Limited | Professional & scientific | 2024 |
| Perold Wine Cellar Limited | Wholesale & retail | 2019 |
| Persad Co Management Limited | Households | 2016 |
| Persis Consulting Limited | Professional & scientific | 2025 |
| PH Foods Ltd | Wholesale & retail | 2003 |
| Pharsyde Solutions Limited | Professional & scientific | 2020 |
| PHI Projects Limited | Professional & scientific | 2001 |
| Phil Bridges & SON Electrical Ltd | Construction | 2014 |
| Philip Purdy Consulting & Advisory Ltd | Professional & scientific | 2026 |
| Phoenix South West Limited | Education | 2012 |
| Pickwicks Limited | Hospitality | 2021 |
| Pierre Jason Physiotherapy Limited | Health & social care | 2018 |
| Pilar Pubs Ltd | Hospitality | 2025 |
| Pine Cone Partnership Ltd | Other services | 2024 |