| Planshare Property Management Limited | Households | 1986 |
| Platinum Landscaping & Maintenance Limited | Administrative & support | 2024 |
| PM Digweed Limited | Construction | 2015 |
| Pmip International Services Limited | Professional & scientific | 2025 |
| POD Bidco Limited | Financial services | 2020 |
| POD Midco Limited | Extraterritorial | 2020 |
| Pond Loke Residents Management Company Limited | Real estate | 2023 |
| Pooch's Yard - Doggy Day Care Ltd | Wholesale & retail | 2021 |
| Poppins Limited | Real estate | 1993 |
| Port Line Logistics Limited | Professional & scientific | 2009 |
| Portbridge Timber Ltd | Manufacturing | 2026 |
| Porzana Limited | Manufacturing | 2001 |
| Positive Impact Worldwide Ltd | Other services | 2010 |
| Positive Software Ltd | Information & communication | 2018 |
| Power Plant Projects (Civil Engineering) Limited | Administrative & support | 2004 |
| Ppsu (Group) Limited | Construction | 2019 |
| Ppsu Ltd | Construction | 2019 |
| Pre-Tec Limited | Wholesale & retail | 2016 |
| Precision CUT Designs Ltd | Wholesale & retail | 2025 |
| Precision Material Handling Ltd | Manufacturing | 2023 |
| Precision Plus Engineering Limited | Professional & scientific | 2004 |
| Precision Refrigeration Limited | Manufacturing | 2000 |
| Premier Driver Solutions Ltd | Wholesale & retail | 2026 |
| Premier Plastics Thetford Ltd. | Manufacturing | 2002 |
| Premier Thetford Ltd | Transport & logistics | 2026 |
| Presingoll Barns Management Company Ltd | Households | 2017 |
| Prestige Leadcraft Ltd | Construction | 2025 |
| Prime Dispatch Logistics Ltd | Wholesale & retail | 2025 |
| Prime Key Asset Investments Ltd | Real estate | 2024 |
| Primo Bully Ltd | Wholesale & retail | 2023 |
| Print and Press Services Limited | Real estate | 1957 |
| Prism Properties Anglia Limited | Real estate | 2019 |
| Pristine Alternative Laser Solutions Limited | Information & communication | 2024 |
| Professional Recruitment Selection Ltd | Administrative & support | 2016 |
| Progress Development (Thetford) Ltd | Manufacturing | 2024 |
| Proline Building Contractors Ltd | Construction | 2016 |
| Promotional Workwear Limited | Manufacturing | 2023 |
| PRONOUNCED80 Properties Ltd | Real estate | 2025 |
| PRONOUNCED80 Solutions Limited | Information & communication | 2017 |
| Property Nest and Invest Ltd | Households | 2025 |
| Property Packers Ltd | Real estate | 2023 |
| Property Quay Ltd | Construction | 2018 |
| Propop Advisers Limited | Real estate | 2015 |
| Proportionate Solutions Ltd | Administrative & support | 2024 |
| Protecting People Ltd | Administrative & support | 2022 |
| Provision Commerce Ltd | Wholesale & retail | 2024 |
| Pt-Link Ltd | Health & social care | 2025 |
| Public House Watton Ltd | Hospitality | 2017 |
| Puddin Thetford Ltd | Manufacturing | 2023 |
| Pure Unique Martial Arts Ltd | Education | 2023 |
| Puredata Ltd | Wholesale & retail | 2009 |
| Puredecisions Ltd | Wholesale & retail | 2009 |
| PVH Carpentry Services Limited | Construction | 2018 |
| Q Workforce UK Ltd | Administrative & support | 2024 |
| QIF Shipping Ltd | Wholesale & retail | 2022 |
| Qsoft Limited | Information & communication | 1991 |
| Qualitair Cooling Ltd | Construction | 2023 |
| Quality Europe Ltd | Hospitality | 2002 |
| Queensway Publishing Limited | Manufacturing | 1995 |
| Quinn Brook Limited | Administrative & support | 2017 |
| Quinn Construction Services (Anglia) Limited | Construction | 2002 |
| Quinn Norfolk Limited | Construction | 2017 |
| R Johns (Norfolk) Limited | Construction | 2020 |
| R S Coatings Limited | Manufacturing | 1999 |
| R&R Witkowski Limited | Wholesale & retail | 2020 |
| R.G. Thornhill (Holly Farm) Limited | Agriculture & fishing | 1971 |
| R.S. Composites Limited | Manufacturing | 1996 |
| R.W. & D.F. Johnson (Builders) Limited | | 1975 |
| R.W.Hill(Farms)Limited | Agriculture & fishing | 1957 |
| Racing Carbon Neutral LLP | | 2021 |
| RADIANCEXPERIENCE2 CIC | Education | 2023 |
| Radiscone Facades Ltd | Construction | 2019 |
| Rafalaco Ltd | Construction | 2025 |
| Ragul Properties Ltd | Real estate | 2026 |
| Ramas Butcher Ltd | Wholesale & retail | 2025 |
| Randale Care Limited | Health & social care | 2014 |
| Ranya Trade Limited | Wholesale & retail | 2025 |
| Raste Ltd | Other services | 2024 |
| RAW Trading Ltd | Construction | 2025 |
| Rayment Plumbing and Heating Limited | Construction | 2019 |
| RC Plastering Ltd | Construction | 2025 |
| Realise Science Ltd | Professional & scientific | 2019 |
| Rebar FIX Form Limited | Construction | 2014 |
| Recycle Tech Hub Ltd | Information & communication | 2024 |
| Red Heels Accounting Ltd | Professional & scientific | 2015 |
| Red Spires Training Ltd | Administrative & support | 2013 |
| Red Storm Consultancy Ltd | Administrative & support | 2018 |
| Rednels Retreat Ltd | Other services | 2026 |
| Reeves Commercial Cleaning Ltd | Administrative & support | 2004 |
| Reflex Safety Limited | Manufacturing | 2003 |
| Reliance Developers Limited | Construction | 2019 |
| Renewatherm Ltd | Construction | 2024 |
| Required Just to Buy Fortigate Support Ltd | Information & communication | 2025 |
| Retain Group Solutions Limited | Administrative & support | 2023 |
| Retro Party Experience Ltd | Arts & recreation | 2021 |
| Reynolds Heating Ltd | Construction | 2016 |
| RH Developments (East Anglia) Ltd | Construction | 2019 |
| Rhodes (UK) Limited | Extraterritorial | 1987 |
| Richard Ames Developments Limited | Construction | 2006 |
| Richard Norton Windows Limited | Construction | 2009 |