| NLK Joinery Limited | Manufacturing | 2026 |
| NO.3 WYE Limited | Hospitality | 2023 |
| Noahs ARK Management Company Limited | Real estate | 2016 |
| Nola 7 International Limited | Construction | 2011 |
| Nomad Hospitality Ltd | Hospitality | 2021 |
| Northern Student Housing Limited | Real estate | 2017 |
| Northvale Game and Shooting Supplies Limited | Arts & recreation | 2025 |
| Norton House B&B Ltd | Hospitality | 2021 |
| NOW Storage Holding Ltd | Financial services | 2025 |
| NOW Storage Ltd | Transport & logistics | 2010 |
| NRH 2012 Ltd | Health & social care | 2012 |
| Oakbank Game & Conservation Ltd | Agriculture & fishing | 2004 |
| Oakwell Medical Ltd | Health & social care | 2026 |
| Oates Imports Limited | Wholesale & retail | 2023 |
| OB Birmingham Ltd | Real estate | 2024 |
| Ocean Finance Alliance Limited | Administrative & support | 1983 |
| Octarine Industries Ltd | Professional & scientific | 2024 |
| Octopus Engineering Limited | Manufacturing | 2023 |
| Old Market Cafe Limited | Hospitality | 2020 |
| Olice Productions Limited | Information & communication | 2014 |
| Olivia Takeaway Ltd | Hospitality | 2025 |
| Open Studio Cards Ltd | Manufacturing | 2020 |
| Optix LED Limited | Administrative & support | 2025 |
| Opulent Management 1 Ltd | Wholesale & retail | 2025 |
| Opulent Property Holdings Limited | Real estate | 2024 |
| Opulent Property Ventures Limited | Real estate | 2023 |
| Orchard Tipis Limited | Administrative & support | 2023 |
| Orde Estate Ltd | Agriculture & fishing | 2014 |
| ORG Properties Ltd | Real estate | 2025 |
| ORIGIN8TIVE Limited | Information & communication | 2004 |
| Osius Limited | Wholesale & retail | 2015 |
| Osteopathic Preservation Ltd | Health & social care | 2018 |
| OUR Ventures Limited | Wholesale & retail | 2019 |
| Outdoor Learning Resources Ltd | Wholesale & retail | 2022 |
| Overross Property Limited | Real estate | 2008 |
| OWH Enterprises Limited | Professional & scientific | 2025 |
| Owsh Capital Limited | Financial services | 2024 |
| Oxbow Consultancy Ltd | Information & communication | 2025 |
| Oxbridge Lighting Ltd | Manufacturing | 2019 |
| Oxford Global Education Development Ltd. | Education | 2015 |
| P a O'Brien Limited | Health & social care | 2025 |
| P.G.L.Voyages Limited | Hospitality | 1960 |
| P.W.M. Design Consultants Ltd | Administrative & support | 2016 |
| Paddocks Monmouth Ltd | Households | 2021 |
| Palmer Financial Services Limited | Financial services | 2022 |
| Panadent Ltd | Health & social care | 2025 |
| Panbrook Farm Ltd | Agriculture & fishing | 2025 |
| Panda Estates Limited | Real estate | 2002 |
| Parrotia Planting Design Ltd | Professional & scientific | 2025 |
| Parry Bespoke Furniture Ltd | Manufacturing | 2024 |
| Parry Court Management Limited | Households | 2006 |
| Partitions Ceilings & Interiors Limited | Construction | 2008 |
| PBW Enterprises Limited | Professional & scientific | 2024 |
| PD Studio 29 Ltd | Professional & scientific | 2019 |
| PEA Green Enterprises Ltd | Real estate | 2019 |
| Pear Hill Ltd | Agriculture & fishing | 2023 |
| Peequal Ltd | Manufacturing | 2020 |
| Pegasus Business Advisors Limited | Professional & scientific | 2015 |
| PEM Limited | Manufacturing | 1984 |
| PEN Y Bryn Animal Sanctuary CIC | Agriculture & fishing | 2023 |
| Pengethley Nursery and Garden Centre Limited | Wholesale & retail | 1995 |
| Penny Farthing at Aston Crewes Limited | Hospitality | 2020 |
| Penny Farthing Inn Ltd | Hospitality | 2025 |
| Penny-Robin Ltd | Professional & scientific | 2013 |
| Penyard Consultancy Ltd | Professional & scientific | 2025 |
| PEQ Group Ltd | Administrative & support | 2021 |
| Percy Labs Limited | Information & communication | 2024 |
| Perfect Pitch Coaching Limited | Professional & scientific | 2003 |
| Petedixonengineering Ltd | Manufacturing | 2026 |
| Pfield Productions Ltd | Information & communication | 2024 |
| PGL Adventure Ltd. | Hospitality | 1979 |
| PGL Air Travel Limited | Hospitality | 1991 |
| PGL Travel Limited | Hospitality | 1974 |
| Phil Cutter Electrical Services Limited | Construction | 1993 |
| Phiz Cottage Enterprises Limited | Wholesale & retail | 2023 |
| Phocle Properties Ltd | Real estate | 2021 |
| Phoenix Forensic Service Provider Ltd | Professional & scientific | 2015 |
| Phoenix Property Estates Limited | Hospitality | 2019 |
| PI Pizza Squared Ltd | Hospitality | 2022 |
| Pink Pineapple Limited | Hospitality | 2020 |
| PIP Sports Limited | Arts & recreation | 2010 |
| Pixelated Creations Ltd | Information & communication | 2024 |
| PJB Bloodstock Ltd | Other services | 2026 |
| Plates&Shakers Ltd | Hospitality | 2024 |
| Plumbing World and Heating Ltd | Construction | 2022 |
| Polunnio Ltd | Professional & scientific | 2014 |
| Pressman Health Limited | Health & social care | 2017 |
| Principles in Partnership Limited | Professional & scientific | 2011 |
| Priory House RTM Company Limited | Extraterritorial | 2013 |
| Priory LEA Walford Limited | Households | 1996 |
| Propersmart Ltd | Information & communication | 2006 |
| Property by SJH Limited | Real estate | 2021 |
| Property Management Maintenance & Financial Services Limited | Real estate | 2022 |
| Property Tax Refund Centre (Claims) Limited | Professional & scientific | 2020 |
| Property Tax Refunds Limited | Professional & scientific | 2025 |
| Prospect Holiday Cottages Limited | Hospitality | 2021 |
| Pure Bullamsay Limited | Financial services | 2021 |
| Purpose Bristol Limited | Arts & recreation | 2017 |
| Qbuk Limited | Professional & scientific | 2026 |
| R & O Trading AS the WYE Knot Inn Ltd. | Hospitality | 2017 |