| Peppup Limited | Manufacturing | 2014 |
| PER Metum Ltd | Information & communication | 2026 |
| Perfect Paradox Ltd | Information & communication | 2026 |
| Perfect Rainbow Ltd | Wholesale & retail | 2024 |
| Peter Dorman Ltd | Wholesale & retail | 2024 |
| Peter Raffell Limited | Wholesale & retail | 2025 |
| Philip EME Limited | Wholesale & retail | 2025 |
| Phoenix Healthcare (N.I.) Limited | Health & social care | 2003 |
| Photo Monkey Media Limited | Manufacturing | 2017 |
| Photong Limited | Wholesale & retail | 2024 |
| Pickardt Jutta Ltd | Wholesale & retail | 2023 |
| Pickie Ltd | Hospitality | 2018 |
| Pielwave Group Ltd | Wholesale & retail | 2024 |
| Pigeon Watch Ltd | Agriculture & fishing | 2009 |
| Pinecroft Enterprises Limited | Professional & scientific | 2002 |
| Pingstreet Civic OS Ltd | Information & communication | 2026 |
| Pinkfawn Ltd | Wholesale & retail | 2025 |
| Pinnacle Aerotech Limited | Administrative & support | 2014 |
| Pinnacle Consultants (NI) Ltd | Real estate | 2009 |
| Piotr Wicazae Ltd | Wholesale & retail | 2024 |
| PIP Chemicals Ltd | Manufacturing | 2015 |
| PIP Saving Limited | Wholesale & retail | 2024 |
| Pizza Lsdp Limited | Administrative & support | 2019 |
| PJG Recovery (NI) Limited | Financial services | 2015 |
| Pjmm Trading and Investment Limited | Construction | 2018 |
| PJS Residential Ltd | Real estate | 2023 |
| PJW Electrics Ltd. | Wholesale & retail | 2014 |
| PKH Midas Jewellery Ltd | Wholesale & retail | 2026 |
| Placegood Developments Ltd | Other services | 2000 |
| Plantila Ltd | Wholesale & retail | 2022 |
| Plantopia (N.I.) Ltd | Agriculture & fishing | 2018 |
| Play-A-Way Preschool Newtownards Ltd | Education | 1999 |
| Plemc Ltd | Health & social care | 2022 |
| Plinthic Limited | Wholesale & retail | 2025 |
| PMB Accountants Limited | Professional & scientific | 2014 |
| PMK Rental Ltd | Real estate | 2022 |
| Podulr Ltd | Information & communication | 2023 |
| Pokébrosuk Ltd | Wholesale & retail | 2025 |
| Pony Tales NI Limited | Arts & recreation | 2022 |
| Port Bay Construction Ltd | Construction | 2017 |
| Portaferry & Strangford Trust Limited | Arts & recreation | 2013 |
| Portaferry Cohousing Limited | Construction | 2022 |
| Portaferry Gala Festival | Health & social care | 2016 |
| Portaferry Marina Limited | Arts & recreation | 2011 |
| Portavogie Apartments Ltd | Construction | 2025 |
| Portavogie Regeneration Forum | Other services | 2015 |
| Portico of Ards Ltd | Arts & recreation | 2008 |
| Portinode Chalets Management Company Limited | Real estate | 1999 |
| Posh Sheds NI Limited | Construction | 2019 |
| Poskewhyderetail Ltd | Wholesale & retail | 2025 |
| Power Washing NI Limited | Other services | 2020 |
| Powerplus Supplies Ltd. | Wholesale & retail | 2014 |
| Ppcni Ltd | Information & communication | 2013 |
| PR Business Growth Services Ltd | Professional & scientific | 2020 |
| PR Golf Limited | Wholesale & retail | 2006 |
| Praesumni Ltd | Education | 2017 |
| Prasticball Cansise Ltd | Wholesale & retail | 2025 |
| Premier Licensing Limited | Wholesale & retail | 2006 |
| Premier Print & Embroidery Ltd | Wholesale & retail | 2015 |
| Premium Laboris Limited | Information & communication | 2020 |
| Presence in Portaferry Limited | Other services | 2014 |
| Prestige Performance Group Ltd | Wholesale & retail | 2023 |
| Pretani Associates Ltd | Education | 2015 |
| Pretty Posie Boutique Ltd | Wholesale & retail | 2021 |
| Pretty Woman Ards Limited | Other services | 2018 |
| Price Pals Ltd | Wholesale & retail | 2024 |
| Prince Literary Ltd | Information & communication | 2025 |
| Print Page Finishing Solutions (N.I.) Limited | Manufacturing | 2021 |
| Printjelly Limited | Administrative & support | 2020 |
| Priory Press Packaging Limited | Manufacturing | 2017 |
| Prize Takeover Ltd | Arts & recreation | 2026 |
| Prizevaultni Ltd | Arts & recreation | 2025 |
| Pro Better Limited | Wholesale & retail | 2024 |
| Pro Paramedics Ltd | Health & social care | 1999 |
| Pro-Pak Phoenix Ltd | Wholesale & retail | 2012 |
| Pro-Protein Innovations Limited | Manufacturing | 2025 |
| Pro-Star Gymnastics Academy Ltd | Health & social care | 2022 |
| Properties @AJM Ltd | Construction | 2025 |
| Property by T & W Ltd | Construction | 2023 |
| Property Swipe Limited | Information & communication | 2026 |
| Propertyvaultuk Limited | Information & communication | 2026 |
| Prosperous Care Trade Ltd | Wholesale & retail | 2024 |
| Protoworks Ltd | Manufacturing | 2024 |
| Ptsd - Progress Through Scuba Diving CIC | Professional & scientific | 2021 |
| Pure Clean (N.I.) Ltd | Manufacturing | 2020 |
| Purple Lashes Retail Limited | Other services | 2012 |
| Puzzleera Tech Ltd | Wholesale & retail | 2024 |
| PW Boilers Ltd | Construction | 2018 |
| PWL Software Services Ltd | Information & communication | 2026 |
| Q Adventures Ltd | Wholesale & retail | 2025 |
| Qebac Limited | Professional & scientific | 2019 |
| Qeencretazn Limited | Wholesale & retail | 2025 |
| Qianfjit Limited | Wholesale & retail | 2025 |
| Qianqiang Shop Limited | Wholesale & retail | 2025 |
| Qihuan Limited | Wholesale & retail | 2023 |
| Qiluo Myst Trade Ltd | Wholesale & retail | 2025 |
| Qinglian Mago Limited | Wholesale & retail | 2025 |
| QNS Miut Ltd | Wholesale & retail | 2025 |
| Quantum Finance Ltd | Financial services | 2023 |
| Quantum Future Ltd | Administrative & support | 2025 |