| Portland View Management Company Limited | Real estate | 2008 |
| Poste Holdings Limited | Hospitality | 1994 |
| Poste Hotels Limited | Hospitality | 1968 |
| Power Play Activity Camps Ltd | Health & social care | 2024 |
| Practice Room Online Ltd | Professional & scientific | 2006 |
| Prbs Management Company Limited | Financial services | 2018 |
| Pre-Piling Surveys Limited | Hospitality | 1963 |
| Precast Project Management Limited | Construction | 2006 |
| Precise Crop Nutrition Limited | Agriculture & fishing | 2011 |
| Precisioncars Ltd | Wholesale & retail | 2024 |
| Preen Partners Limited | Real estate | 2014 |
| Premcom UK Ltd | Manufacturing | 2025 |
| Premier Selection Limited | Administrative & support | 2022 |
| Pretzel Logic Derby Limited | Manufacturing | 2018 |
| Pretzel Logic EU Limited | Manufacturing | 2025 |
| Pretzel Logic Lakenheath Limited | Real estate | 2016 |
| Pretzel Logic Leicester 2 Limited | Administrative & support | 2022 |
| Pretzel Logic Peterborough Limited | Manufacturing | 2017 |
| Pretzel Logic UK Limited | Manufacturing | 2011 |
| Prime Central Ltd | Real estate | 2005 |
| Primecart Traders Ltd | Wholesale & retail | 2026 |
| Priory Veterinary Practice Ltd | Professional & scientific | 2016 |
| Pro Machine Tools Limited | Manufacturing | 1996 |
| Pro-Tekt Consultants Limited | Professional & scientific | 2016 |
| Pro-Tekt Holdings Limited | Financial services | 2022 |
| Pro-Vent Limited | Construction | 2014 |
| Professional Engineering Development Ltd | Extraterritorial | 2016 |
| Progress 8 Trading Ltd | Professional & scientific | 2015 |
| Prologue Business School Ltd | Education | 2026 |
| Promenade Coffee and Drinks Limited | Hospitality | 2026 |
| Prop-Elle Limited | Professional & scientific | 2024 |
| Proper Notswolds Ltd | Households | 2025 |
| Propertyflip Ltd | Real estate | 2019 |
| PSF Accounting Ltd | Professional & scientific | 2024 |
| Pupdrobe Ltd | Manufacturing | 2020 |
| Pura Vida Solutions Limited | Manufacturing | 2024 |
| Pure ORA Limited | Arts & recreation | 2018 |
| Purple Mallet Ltd | Wholesale & retail | 2020 |
| Purposeful Miles Limited | Arts & recreation | 2024 |
| Q88 LLC | | 2015 |
| QB Technologies Limited | Information & communication | 2021 |
| Qsaas Ltd | Extraterritorial | 2023 |
| Quality Resourcing Solutions Limited | Administrative & support | 2013 |
| Quantum Leap Security Ltd | Information & communication | 2025 |
| Queen Street Mills Management Company Ltd | Real estate | 2007 |
| Quinnhospitalitywb Ltd | Hospitality | 2020 |
| R & a Services Limited | Transport & logistics | 2024 |
| R & D Electrical Contractors Limited | Construction | 2004 |
| R & D Harper Limited | Professional & scientific | 2023 |
| R a Baker Advisory Services Ltd | Professional & scientific | 2011 |
| R Flint Consulting Limited | Professional & scientific | 2021 |
| R K Bradley & Sons Ltd | Agriculture & fishing | 2002 |
| R-Mc Power Recovery Limited | Manufacturing | 2001 |
| R. Carter (Holdings) Limited | Real estate | 1996 |
| R. E Newton Limited | Construction | 2004 |
| Raca Educational Ltd | Professional & scientific | 2023 |
| Race Glaze Limited | Wholesale & retail | 1999 |
| Rachael Smith Photography Limited | Professional & scientific | 2004 |
| Radcliffes Homes Ltd | Real estate | 2025 |
| Radiant Diamonds (Stamford) Ltd | Wholesale & retail | 2021 |
| Raenbeau Creative Ltd | Manufacturing | 2024 |
| Rainbow Childcare Centres Ltd | Education | 2011 |
| Ralph George & Dragon Limited | Hospitality | 2017 |
| Ralph James Developments Limited | Real estate | 2021 |
| Ravencourt Limited | Wholesale & retail | 1984 |
| RAW Architecture Ltd | Professional & scientific | 2014 |
| Raymond-Michael Mclennan | Administrative & support | 2024 |
| RB Legacy Roofing Ltd | Construction | 2026 |
| Rc-Arts Ltd | Wholesale & retail | 2025 |
| RE Plus Fitness Ltd | Wholesale & retail | 2020 |
| Read Training Ltd | Professional & scientific | 2020 |
| Real Consult Ltd | Extraterritorial | 2024 |
| Rebecca Steele UK Ltd | Professional & scientific | 2014 |
| Recharge Roadside Services Ltd | Construction | 2020 |
| Record Property Solutions Limited | Real estate | 2010 |
| Recrion Limited | Administrative & support | 2003 |
| Red Apple Developments Limited | Construction | 2024 |
| Red Jade Limited | Information & communication | 2012 |
| Red MED Consultancy and Events Limited | Professional & scientific | 2024 |
| Red Robin Resources Ltd | Administrative & support | 2017 |
| Red Rocket HR Consultancy Ltd | Professional & scientific | 2022 |
| Regal Roost Properties Limited | Real estate | 2024 |
| Reinstitute, Inc | | 2015 |
| Rekindled Properties Ltd | Real estate | 2020 |
| Remember Cambridge Limited | Wholesale & retail | 2016 |
| Renbrac Ltd | Professional & scientific | 2014 |
| Renbrac Renewables Ltd | Wholesale & retail | 2019 |
| Repayd Limited | Financial services | 2025 |
| Resilient Code Limited | Information & communication | 2023 |
| Retail Post Media Limited | Professional & scientific | 2016 |
| Returnal Ltd | Information & communication | 2022 |
| Rhino's Gymnasium Limited | Arts & recreation | 2012 |
| Rhubarb Retail Ltd | Other services | 2017 |
| Rhuomai Ltd | Wholesale & retail | 2025 |
| Richard Nixon Consulting Limited | Professional & scientific | 2022 |
| Richardson Fitness Ltd | Arts & recreation | 2026 |
| Richardson Thompson Leech LLP | | 2002 |
| Ridlington Road Pictures Limited | Information & communication | 2021 |
| Rigidal Construction Systems Limited | Manufacturing | 2017 |
| Ripple Business Services Ltd | Professional & scientific | 2009 |