| Pattersons Meats Ltd | Wholesale & retail | 2004 |
| Paul Berry Group Training Limited | Health & social care | 2023 |
| PCR Property Developments Limited | Construction | 2026 |
| Peacecompany Ltd | Health & social care | 2024 |
| Pestni Ltd | Education | 2017 |
| Phoenix SIM Sport Ltd | Extraterritorial | 2024 |
| PHOTOCLUB247 Ltd | Education | 2022 |
| Pickford's Vanguard Industrial Engineering | | 1994 |
| PIG Innovation Centre Limited | Agriculture & fishing | 2006 |
| Pilates Refinery Ltd | Arts & recreation | 2025 |
| Pilut Limited | Financial services | 2018 |
| Ping Digital Ltd | Information & communication | 2025 |
| Pizza Dons Limited | Hospitality | 2025 |
| Plaskets Burn Limited | Professional & scientific | 2023 |
| Platinum Healthcare Limited | | 1999 |
| Platone Ltd | Information & communication | 2026 |
| Pmcg Builders Ltd | Construction | 2024 |
| Pmck Sports Turf Solutions Limited | Administrative & support | 2022 |
| PMG GDP Limited | Health & social care | 2025 |
| Polar Rainwater Solutions Limited | Construction | 2024 |
| Polybagstores Ltd | Wholesale & retail | 2010 |
| Portheath Investments Limited | Real estate | 2025 |
| Portlee Associates Ltd | Professional & scientific | 2015 |
| Portlee Engineering Limited | Construction | 2021 |
| Portleewest Ltd | Manufacturing | 2018 |
| Positive Electrical Systems Ltd | Construction | 2005 |
| PP Corcoran Limited | Information & communication | 2014 |
| PR Property Lets Ltd | Households | 2017 |
| Prad-Wise Solutions Ltd | Health & social care | 2024 |
| Precision Sports Injury Clinic Ltd | Arts & recreation | 2025 |
| Premier Finishes Limited | Construction | 2020 |
| Premier Healthcare (NI) Ltd | Wholesale & retail | 2001 |
| Premium Cycle Brands Ltd | Wholesale & retail | 2014 |
| Prestige Diadem Ltd | Wholesale & retail | 2024 |
| Prestige Luxury Limited | Other services | 2020 |
| Primal Strength Limited | Wholesale & retail | 2016 |
| Pro Quantum Commercial Management Ltd | Professional & scientific | 2024 |
| Pro Velo KIT Ltd | Wholesale & retail | 2024 |
| Proaxsis Ltd | Professional & scientific | 2013 |
| Production Tool Supplies Ltd | Manufacturing | 2014 |
| Professional Sales Personnel Limited | Other services | 2025 |
| Project Design Engineers Holdings Limited | Professional & scientific | 2013 |
| Project Design Engineers Limited | Professional & scientific | 1989 |
| Property Stores Trading Ltd | Administrative & support | 2020 |
| Prspr Antrim Limited | Other services | 2023 |
| PS Housing & Property Services Ltd | Real estate | 2024 |
| Psjh Ltd | Transport & logistics | 2006 |
| Psychic Fiona Events Ltd | Professional & scientific | 2025 |
| PT Healthcare Services Limited | Health & social care | 2024 |
| Pulse Electrical Limited | Construction | 2015 |
| Purpos Group Limited | Financial services | 2024 |
| Qingcaiy Ltd | Manufacturing | 2024 |
| Qingqinggege Limited | Wholesale & retail | 2025 |
| Quality Delia Care Ltd | Public administration | 2026 |
| Quayside Construction Limited | Professional & scientific | 2005 |
| Quest Verification Services Limited | Professional & scientific | 1996 |
| Qular Homes Limited | Real estate | 2024 |
| R & K Brooks Facebook Ltd | Construction | 2025 |
| R.K Fabrications (N.I.) Limited | Administrative & support | 2019 |
| R.T. Painting & Decorating Limited | Construction | 2019 |
| Raceview Accommodation Limited | Arts & recreation | 2002 |
| Radiance Sphere Aesthetics Limited | Other services | 2024 |
| Radkhat Ltd | Health & social care | 2025 |
| Railstar Training Ltd | Professional & scientific | 2024 |
| Randalstown Arches Association | Education | 1995 |
| Randalstown Pharmacies Limited | Health & social care | 1975 |
| Rascals Castles MID Ulster Limited | Administrative & support | 2022 |
| Rathmore Property Management Ltd | Real estate | 1998 |
| Raymart Developments Limited | Construction | 2005 |
| Raymart Fabrications Ltd | Manufacturing | 2026 |
| RC Kitchens & Bathrooms Ltd | Other services | 2012 |
| RCM Impact Marketing Ltd | Professional & scientific | 2025 |
| REA Distribution Limited | Transport & logistics | 1981 |
| Ready to Home Ltd | Real estate | 2026 |
| Real Hope Limited | Other services | 2014 |
| Redmond and Sons Limited | Construction | 2016 |
| Redskyai Ltd | Professional & scientific | 2025 |
| Refnewrive Trading Ltd | Wholesale & retail | 2026 |
| Rehability | Other services | 2010 |
| Reid Rentals NI Ltd | Real estate | 2018 |
| Rejuvenate by Russel Limited | Health & social care | 2023 |
| Reliance Automation Ltd | Wholesale & retail | 2023 |
| Reliancein Limited | Administrative & support | 2022 |
| Remac International Consultancy Limited | Professional & scientific | 1999 |
| Remayo Merit Care Ltd | Health & social care | 2021 |
| Repose Hair and Beauty Academy Ltd | Education | 2021 |
| Respat Care Services Ltd | Administrative & support | 2024 |
| Revlis Media Ltd | Arts & recreation | 2023 |
| RHS 22 Ltd | Financial services | 2022 |
| Right to FLY Limited | Transport & logistics | 2020 |
| Ring Fire and Security Ltd | Construction | 2025 |
| Riskhub International Limited | Information & communication | 2025 |
| Rist Management Limited | Professional & scientific | 2013 |
| River Bann and Lough Neagh Association Company - the | Arts & recreation | 2005 |
| Rivermore Resources Limited | Administrative & support | 2016 |
| Riverside Management Company (Antrim) Limited | Real estate | 2022 |
| Riverview Spa Ltd | Other services | 2021 |
| RKS Estates Limited | Real estate | 2022 |
| RMD Insight Consultancy Limited | Professional & scientific | 2024 |
| RMH Physio Limited | Other services | 2023 |