| Phoenix Safety Solutions Ltd | Financial services | 2022 |
| PIA Studios Limited | Professional & scientific | 2020 |
| Pile Breaking Hire Ltd | Construction | 2018 |
| Plant Safety Ltd. | Construction | 2023 |
| Plantation 22 Ltd | Health & social care | 2024 |
| Platinum Recruitment (NI) Ltd | Administrative & support | 2008 |
| PLC Construction Ltd | Construction | 2023 |
| PM Bloodstock Limited | Agriculture & fishing | 2022 |
| Pmck Construction Ltd | Construction | 2015 |
| POD Kitchens Ltd | Manufacturing | 2025 |
| Polytollan Ltd | Manufacturing | 2021 |
| Powerflushing NI Limited | Other services | 2024 |
| Ppco NO.0 Limited | Construction | 2011 |
| Precious OIL Productions Limited | Information & communication | 2005 |
| Premier Spinal Health Ltd | Public administration | 2019 |
| Premier Surfaces Ltd | Construction | 2025 |
| Premiere Poultry Ltd | Manufacturing | 2003 |
| Pricewise Superstore Ltd | Wholesale & retail | 2019 |
| Pro Solar NI Group Ltd | Construction | 2025 |
| Pro Solar NI Limited | Construction | 2022 |
| Pro Surface (IRL) Ltd | Construction | 2020 |
| Pro-Fit Windows & Joinery Ltd | Construction | 2016 |
| Product and Utilities Limited | Wholesale & retail | 2017 |
| Proell Care Services Ltd | Health & social care | 2016 |
| Protect Health & Safety Services Ltd | Administrative & support | 2019 |
| Pump Park Vintage Photography Ltd | Wholesale & retail | 2013 |
| Pure EYE Design Ltd | Construction | 2021 |
| QP Hire Ltd | Construction | 2015 |
| QR Interim Management Ltd | Professional & scientific | 2018 |
| Quarryplan (GB) Limited | Mining & quarrying | 2009 |
| Quarryplan Limited | Other services | 2004 |
| Quay Service Solutions Ltd | Real estate | 2009 |
| Quinn Engineering Ltd | Construction | 2011 |
| Quinn Environmental Consulting Limited | Professional & scientific | 2024 |
| Quinn Specialist Works Ltd | Construction | 2025 |
| Quinnaccountancy Limited | Professional & scientific | 2011 |
| Quoile Agri Limited | Agriculture & fishing | 2018 |
| Quoile Fuels Limited | Wholesale & retail | 2001 |
| Quoile Holdings Limited | Financial services | 2023 |
| Quoile Property Services Ltd | Financial services | 2010 |
| R & P Mccall Holdings Limited | Financial services | 2018 |
| R B Mckelvey Ltd | Agriculture & fishing | 2025 |
| R W Neill Limited | Agriculture & fishing | 2006 |
| R&D Marron Construction Limited | Construction | 2019 |
| R&E Mcgreevy Properties Limited | Real estate | 2013 |
| R&W’S Little Adventures Ltd | Health & social care | 2025 |
| Rademon Estate Distillery Limited | Manufacturing | 2012 |
| Raleagh Equine Rescue Limited | Agriculture & fishing | 2001 |
| Rally Management International Ltd | Professional & scientific | 2024 |
| Ralph's Fish & Chips Ltd | Hospitality | 2026 |
| Ramy Agencies & Marketing Company Limited | Professional & scientific | 1991 |
| Rathmore House Ltd | Professional & scientific | 2009 |
| Rccmechanical Ltd | Manufacturing | 2025 |
| Red River Agencies Ltd | Wholesale & retail | 2023 |
| Redfin Limited | Hospitality | 2013 |
| Reformed Auto Parts Limited | Manufacturing | 2020 |
| Regent International Advisory Limited | Information & communication | 2020 |
| Reilnice Projects Ltd | Construction | 2024 |
| Renew Aesthetics Limited | Other services | 2025 |
| Repair Lounge Downpatrick Limited | Wholesale & retail | 2025 |
| Restaurant Supplies NI Ltd | Wholesale & retail | 2016 |
| Restore and Regenerate Ltd | Wholesale & retail | 2023 |
| Retro Classic Rally Cars Ltd | Wholesale & retail | 2021 |
| Reviewedbuy Ltd | Information & communication | 2022 |
| RF Auto Key Limited | Wholesale & retail | 2020 |
| Richard P Mcgreevy & SON Ltd | Wholesale & retail | 2009 |
| Richmusicni | Education | 2017 |
| Ring Dufferin Care (N.I.) Limited | Health & social care | 2019 |
| Ringdufferin Holdings Ltd | Professional & scientific | 2025 |
| Ringfad Ltd | Agriculture & fishing | 2011 |
| Riversend Enterprises Limited | Information & communication | 2017 |
| Rkpm Ltd | Other services | 2026 |
| Rkpml Ltd | Other services | 2026 |
| RNL Structures Limited | Manufacturing | 2026 |
| Robert Alexander & Co. (Electrical) Ltd | Manufacturing | 2007 |
| Robert Bready & Sons Limited | Other services | 2018 |
| Rockshed Limited | Wholesale & retail | 2020 |
| Rodman Holdings Limited | Real estate | 2021 |
| Rodrick Design Limited | Professional & scientific | 2015 |
| Rory's Staycations Ltd | Extraterritorial | 2021 |
| Rory's Travel Ltd | Administrative & support | 2025 |
| Rosemarino Ltd | Real estate | 2025 |
| Ross Mulhall Photography Limited | Professional & scientific | 2021 |
| Ross Property Maintenance Ltd | Households | 2016 |
| Rossglass Haylage Limited | Agriculture & fishing | 2006 |
| Rostrevor Property Holdings Ltd | Construction | 2020 |
| Round House DPK Ltd | Hospitality | 2017 |
| Ruddell Mechanical Services Limited | Manufacturing | 2016 |
| S & a Properties (N.I.) Ltd | Real estate | 2018 |
| S. Cahill Costumes Limited | Information & communication | 2026 |
| Saraya One Limited | Professional & scientific | 2011 |
| Saraya Two Services Ltd. | Professional & scientific | 2017 |
| Sark Properties LLP | | 2016 |
| Sauce Master Ltd | Manufacturing | 2018 |
| Sauce Works Ltd | Manufacturing | 2012 |
| Savage Lock & Safe Ltd | Administrative & support | 2015 |
| Sawdust & Rainbows Limited | Manufacturing | 2019 |
| Scocal Property Ltd | Construction | 2022 |
| Scotts Mechanical Services Ltd | Professional & scientific | 2026 |
| Scullion & Green Solicitors Limited | Professional & scientific | 2012 |