| P.L.F Accounting & Consulting Ltd. | Professional & scientific | 2013 |
| Pace B Ltd | Information & communication | 2020 |
| PAD Properties Limited | Real estate | 2017 |
| Pages Bake House Limited | Hospitality | 2015 |
| Pakflatt (UK) Limited | Manufacturing | 1978 |
| Palma Enterprises Limited | Real estate | 2022 |
| Panache on the Green Ltd | Wholesale & retail | 2022 |
| Panel Source Limited | Wholesale & retail | 2026 |
| Paradox Productions Ireland Ltd | Professional & scientific | 2023 |
| Paragon Waste (UK) Ltd | Water & waste | 2014 |
| Parakite Ltd | Information & communication | 2013 |
| Park Environmental Solutions Ltd | Construction | 2013 |
| Parkcure Construction Services Limited | Professional & scientific | 2018 |
| Parke Property Limited | Construction | 2022 |
| Parkgate Digital Ltd | Information & communication | 2024 |
| Parkview Terrace Management Company Ltd | Households | 2008 |
| Parts Garage Ltd | Manufacturing | 2010 |
| PAS Rentals Limited | Real estate | 2021 |
| Passive Airtight Solutions Ltd | Construction | 2025 |
| PAT Doherty Ltd | Water & waste | 2008 |
| PAT O'Kane Car Sales Ltd | Wholesale & retail | 2002 |
| Patrick C Construction Limited | Construction | 2022 |
| Patrick Mulvenna Limited | Health & social care | 2008 |
| Patsy Mccallion Ltd | Construction | 2015 |
| Pattersons Kitchens Ltd | Wholesale & retail | 2012 |
| Paul Bratton Body Injury Clinic Limited | Health & social care | 2025 |
| Paul MC Gowan Fitness Ltd | Arts & recreation | 2024 |
| Paul O'Keefe Estate Agents Limited | Real estate | 2018 |
| Paul's Butchers Limited | Wholesale & retail | 2003 |
| Paula Powell Coaching Ltd | Other services | 2023 |
| PC Patrol (Ireland) Limited | Other services | 2009 |
| PCH Accountancy Solutions Ltd | Professional & scientific | 2023 |
| PCI Consulting Ltd | Professional & scientific | 2000 |
| PCI Properties Ltd | Real estate | 2014 |
| PD Motor Group NI Ltd | Wholesale & retail | 2026 |
| PDC Derry Limited | Wholesale & retail | 2018 |
| Pdiddy Construction Ltd | Construction | 2025 |
| PDQ Derry Limited | Hospitality | 2023 |
| Peacebridge Properties Limited | Real estate | 2019 |
| Pebble (PBL) Ltd | Education | 2023 |
| Peerless Linen Ltd | Manufacturing | 2014 |
| Peggy Gordons Ltd | Hospitality | 2023 |
| Pellipar Gatelodge Ltd | Hospitality | 2018 |
| Pembridge Projects Ltd | Real estate | 2022 |
| Pembroke Projects Limited | Financial services | 2026 |
| Pennick Trading Ltd | Wholesale & retail | 2026 |
| Pennyburn Industries Limited | Manufacturing | 2019 |
| People's Peace Forest Limited | Other services | 2025 |
| Peoples EPC Ltd | Professional & scientific | 2026 |
| Peoples Street Homes Limited | Hospitality | 2026 |
| Perfect Bliss Wedding Events Limited | Other services | 2016 |
| Perfect Bliss Wedding Shows Limited | Other services | 2016 |
| Perfect Spine Ltd | Health & social care | 2018 |
| Perfections Hair & Tanning Ltd | Other services | 2012 |
| Perspec Ltd | Professional & scientific | 2023 |
| Perspective Financial Solutions LLP | | 2018 |
| Petunia Avenue Company Limited | Extraterritorial | 2024 |
| PFA Healthcare Limited | Professional & scientific | 2023 |
| PG Haulage Limited | Transport & logistics | 2016 |
| PG Tarmac & Grounds Work Ltd | Construction | 2025 |
| PGB Cloud Consulting Limited | Professional & scientific | 2021 |
| PGB Property Management Limited | Real estate | 2025 |
| PGM Premier Consultancy Limited | Other services | 2011 |
| Phase X Consulting Limited | Information & communication | 2023 |
| Phelan Property Ltd | Real estate | 2025 |
| Phoenix SW (N.I) Ltd | Information & communication | 2021 |
| Phone Circle Limited | Wholesale & retail | 2019 |
| Phone X2 Limited | Wholesale & retail | 2026 |
| Pickleberrypop Limited | Education | 2018 |
| Piece Makers Limited | Manufacturing | 2013 |
| Pinetree Lodges & Cabins Ltd | Manufacturing | 2019 |
| Pink Nails & Spa Waterloo Ltd | Other services | 2025 |
| Pinpoint Advisory Services Ltd | Professional & scientific | 2022 |
| Piper Sweeney Limited | Extraterritorial | 2015 |
| Pjec Ltd | Real estate | 2018 |
| PK Brickwork Derry Ltd | Construction | 2022 |
| PKH Facility Services Limited | Administrative & support | 2020 |
| Planet.Gymmastics NI Limited | Arts & recreation | 2020 |
| Plantation Shutter Kngs Ltd | Manufacturing | 2024 |
| Plaphyn Limited | Wholesale & retail | 2026 |
| Plum Terrace Company Limited | Extraterritorial | 2022 |
| PM Management Consulting Ltd | Professional & scientific | 2014 |
| PMC Menswear Co Limited | Wholesale & retail | 2021 |
| PMD Flooring Ltd | Construction | 2009 |
| PMD Suites Ltd | Real estate | 2025 |
| PME Sport Ltd | Arts & recreation | 2024 |
| PMG Tech Ltd | Information & communication | 2024 |
| PMN Coffee Lounge Ltd | Hospitality | 2025 |
| Pneuma Healthcare Limited | Health & social care | 2022 |
| Pnhargan Ltd | Education | 2025 |
| Point Property Limited | Real estate | 2014 |
| POP & Plan Events Ltd | Arts & recreation | 2026 |
| Poplar Design Homes Ltd | Real estate | 2023 |
| Poplar Design Living Ltd | Wholesale & retail | 2023 |
| Portaferry Holidays Limited | Hospitality | 2025 |
| Portbannis AM 8 Ltd | Real estate | 2025 |
| Porter's Bar Ltd | Hospitality | 2016 |
| Portland 38 Management Company Limited | Households | 2022 |
| Portsalon House Limited | Financial services | 2019 |
| Positive Future Financial Ltd | Financial services | 2014 |