| Precious Packaging Ltd | Manufacturing | 2018 |
| Precision Building Services Modelling Ltd | Professional & scientific | 2020 |
| Precision Face and Body Clinic Ltd | Other services | 2021 |
| Preen Cosmetics Ltd | Wholesale & retail | 2025 |
| Premier Upholstery Services Ltd | Manufacturing | 2018 |
| Premium Fitness Limited | Arts & recreation | 2025 |
| Premium Stallions Ltd | Agriculture & fishing | 2023 |
| Preorders Limited | Wholesale & retail | 2024 |
| Press EYE Photography Ltd. | Information & communication | 2012 |
| Prestige Aluclad (NI) Ltd | Construction | 2018 |
| Pretty Much ME Ltd | Professional & scientific | 2019 |
| PRG Consultant Limited | Professional & scientific | 2025 |
| Primal Challenges Ltd | Administrative & support | 2015 |
| Primal Immune Booster Ltd | Manufacturing | 2026 |
| Prime Supply Ltd | Wholesale & retail | 2025 |
| Primrose Hill Family Farm Ltd | Agriculture & fishing | 1990 |
| Primrose Hill Gilford Management Limited | Households | 2026 |
| Principal Pastry Limited | Manufacturing | 2011 |
| Print Business Supplies Lurgan Ltd | Wholesale & retail | 2026 |
| Print-It (Moira) Ltd | Administrative & support | 2015 |
| Print-It Colour Ltd | Professional & scientific | 2016 |
| Prmcg Ltd | Real estate | 2025 |
| Pro I.D Ltd | Professional & scientific | 2020 |
| Pro Mobiles & Tablets Ltd | Wholesale & retail | 2016 |
| Pro-Active Healthcare Ltd | Health & social care | 2020 |
| Probateni Limited | Financial services | 2024 |
| Probatum NI Ltd | Financial services | 2018 |
| Problue Solutions Ltd | Information & communication | 2021 |
| Prodrum Ltd | Manufacturing | 2023 |
| Profivision Ltd | Other services | 2010 |
| Progamecity Ltd | Wholesale & retail | 2025 |
| Project Ceramics Ltd | Construction | 2020 |
| Projxt Ltd | Professional & scientific | 2023 |
| Propaint Design Ltd | Construction | 2024 |
| Property Apple Limited | Real estate | 2008 |
| Property Management Services (N.I.) Limited | Wholesale & retail | 1978 |
| Property-Solutions-Ni Limited | Real estate | 2022 |
| Protech Belting Ltd | Manufacturing | 2021 |
| Provenance Salads Ltd | Manufacturing | 2001 |
| PSC Laboratories Ltd | Wholesale & retail | 2020 |
| PSG Ventures Ltd | Hospitality | 2024 |
| PSI Recruitment Ltd | Administrative & support | 2021 |
| Psychrapport Limited | Health & social care | 2023 |
| Pure OIL (NI) Ltd | Wholesale & retail | 2023 |
| Purple Finch Productions Ltd | Information & communication | 2016 |
| Purple Wellbeing Services Ltd | Health & social care | 2022 |
| Purpleapron Limited | Administrative & support | 2014 |
| Purplesheep Design Limited | Professional & scientific | 2025 |
| PW Data Services Limited | Information & communication | 2021 |
| PW Sports Limited | Wholesale & retail | 2023 |
| PW Thornbury Ltd | Professional & scientific | 2001 |
| Pwrhouse Pilates Limited | Arts & recreation | 2024 |
| Pyline Solutions Ltd | Information & communication | 2026 |
| QIANCHEN365 Ltd | Hospitality | 2025 |
| QLC Solutions Limited | Other services | 2011 |
| Quantum Goats Systems Limited | Manufacturing | 2022 |
| Quantum Motion Intelligence Ltd | Information & communication | 2026 |
| Quillyburn Manor Management Company Limited | Households | 2004 |
| Quinn Autoparts Limited | Manufacturing | 2017 |
| Quinn Engineering Solutions Ltd | Professional & scientific | 2019 |
| Quinn Porter Consulting Ltd | Other services | 2017 |
| Quinn Transport (Armagh) Ltd | Transport & logistics | 2014 |
| Qulity Hang Limited | Wholesale & retail | 2025 |
| R & K Holdings Limited | Real estate | 2018 |
| R & L Wilson Alloys Ltd | Wholesale & retail | 2019 |
| R D (NI) Limited | Hospitality | 2014 |
| R D Engineering Services (NI) Ltd | Manufacturing | 2010 |
| R Hospitality Ltd | Hospitality | 2026 |
| R I Andrews Ltd | Construction | 2006 |
| R N Walmsley Limited | Professional & scientific | 2017 |
| R Stewart Plant and Haulage Ltd | Transport & logistics | 2026 |
| R&R Ecom Limited | Wholesale & retail | 2024 |
| R. Anderson Contracts Limited | Agriculture & fishing | 2007 |
| R. Heatrick Limited | Administrative & support | 2001 |
| R.A. Irwin & Company Limited | Manufacturing | 1979 |
| R.A. Irwin (Holdings) Limited | Extraterritorial | 1963 |
| R.D. Statistical Consulting Ltd | Professional & scientific | 2019 |
| R2S Services Limited | Other services | 2024 |
| R4 Limited | Water & waste | 2002 |
| R8 Church | Other services | 2017 |
| RA Irwin 2019 Limited | Manufacturing | 2019 |
| Rachel Fowler Advisory Ltd | Professional & scientific | 2018 |
| Rachel Rose Accessories Ltd | Wholesale & retail | 2015 |
| Rafar Limited | Administrative & support | 2007 |
| Rainbow Career Solutions Limited | Education | 2013 |
| RAJ Indian Spice Ltd | Hospitality | 2021 |
| Rajas Newry Motors Ltd | Wholesale & retail | 2024 |
| Rampart Homes NI Ltd | Real estate | 2025 |
| Randbit Ltd | Information & communication | 2025 |
| Ranis Fine Foods Ltd | Wholesale & retail | 2025 |
| Ransconi Pet Products Ltd | Wholesale & retail | 2019 |
| Rapid International (Holdings) Limited | Professional & scientific | 2014 |
| Rapid Power Generation Ltd | Manufacturing | 2019 |
| Rapid Truck Mixers Ltd | Manufacturing | 2019 |
| Ratheoin Limited | Real estate | 2020 |
| Ravenwave Limited | Real estate | 2013 |
| Raybank Construction Limited | Construction | 1979 |
| Rayz Tanning Salon Limited | Other services | 2025 |
| RB Commercial Repairs Ltd | Wholesale & retail | 2024 |
| RBC Interiors NI Ltd | Construction | 2026 |