| Player Profile Europe Ltd | Arts & recreation | 2024 |
| PMC Agri Services Limited | Agriculture & fishing | 2025 |
| Pmcn Ltd | Construction | 2025 |
| PMI Consultancy Limited | Administrative & support | 2025 |
| Pobal Mhuileann an Tsiain | Education | 2014 |
| POC Electrics Ltd | Construction | 2025 |
| Pointed Consulting Limited | Information & communication | 2018 |
| Polycolor Limited | Manufacturing | 2013 |
| Porter Haulage Ltd | Transport & logistics | 2019 |
| Porter Services Limited | Wholesale & retail | 2017 |
| Positive Parties Limited | Education | 2012 |
| Power Solutions Ireland Ltd | Wholesale & retail | 2024 |
| Precision Plumbing Services Limited | Construction | 2016 |
| Precision Quantity Surveyors Ltd | Professional & scientific | 2023 |
| Premium Bathrooms & Furniture Ltd | Wholesale & retail | 2025 |
| Prestige Auto Sales Ireland Ltd | Wholesale & retail | 2026 |
| Prestige Cars Ireland Ltd | Wholesale & retail | 2015 |
| Printechstyle Ltd | Other services | 2020 |
| Pristine Property Maintenance NIE Limited | Households | 2024 |
| Pro Crane Services Ltd | Transport & logistics | 2016 |
| Pro-Tech Mechanical Limited | Construction | 2024 |
| Professional Admin Ltd | Administrative & support | 2025 |
| PXL House Ltd | Manufacturing | 2016 |
| Qingsguo Sport Ltd | Wholesale & retail | 2023 |
| Quarry King Ltd | Construction | 2010 |
| Quarry Plant Repairs Ltd | Manufacturing | 2026 |
| Quigley Aesthetics Limited | Other services | 2022 |
| Quigley Plumbing Limited | Wholesale & retail | 2024 |
| R Caldwell Plant Sales & Hire Ltd | Administrative & support | 2023 |
| RA Ventures Ltd | Financial services | 2017 |
| Radar Security Ltd | Administrative & support | 2020 |
| Ramec Ltd | Construction | 2011 |
| Rapid Construction Systems Limited | Manufacturing | 2025 |
| Rapport Design Ltd | Financial services | 2007 |
| RBJ Construction Limited | Construction | 2015 |
| RC Payroll Solutions Ltd | Professional & scientific | 2019 |
| React Social Ltd | Administrative & support | 2022 |
| Real Supplies Direct Limited | Wholesale & retail | 2024 |
| Realta Venture Holdings (NI) Limited | Financial services | 2024 |
| Red Hill Environmental Ltd | Professional & scientific | 2021 |
| Red Wire Blue UK Limited | Transport & logistics | 2018 |
| Redstar (N.I.) Limited | Financial services | 2018 |
| Reel Cultural Rhythm Ltd | Education | 2025 |
| Reelin Utilities Limited | Construction | 2023 |
| Refined Auto Styling Ltd | Wholesale & retail | 2024 |
| Relin Bridge Transport Limited | Transport & logistics | 2018 |
| Richardo's Wood Management Co Limited | Households | 2024 |
| Riluk Ltd | Hospitality | 2025 |
| Rite Height Scaffolding Ltd | Construction | 2013 |
| River Mourne Guides Limited | Wholesale & retail | 2014 |
| Riverside Duck Eggs Ltd | Wholesale & retail | 2020 |
| Riverside Livestock Limited | Agriculture & fishing | 2018 |
| RJ Coyle Haulage Ltd | Transport & logistics | 2012 |
| RJA Welding Ltd | Manufacturing | 2023 |
| RMS Fitness Limited | Arts & recreation | 2025 |
| RMS Properties & Investment Ltd | Households | 2025 |
| RMS Travel & Coach Hire Ltd | Transport & logistics | 2025 |
| Robert Laird and David Laird Tullyard Limited | Agriculture & fishing | 2006 |
| Robinson & Co (N.I.) Ltd | Professional & scientific | 2013 |
| Robinson (N.I.) Ltd | Manufacturing | 2010 |
| Roche Bros Ltd | Construction | 2021 |
| Roche Law Limited | Professional & scientific | 2014 |
| Rockstar Reading Limited | Information & communication | 2025 |
| RON Contracts Ltd | Construction | 2021 |
| Ronan Mcanenny Ltd | Real estate | 2012 |
| Roncon Ltd | Wholesale & retail | 2021 |
| Ronhill NI Limited | Extraterritorial | 2016 |
| Roost Apartments Ltd | Real estate | 2017 |
| Roundhill Foods Limited | Hospitality | 2024 |
| Roundhill Mews Management Ltd | Households | 2013 |
| Roundhill One Ltd | Real estate | 2022 |
| RPG Ireland Ltd | Hospitality | 2021 |
| RR Ventures Limited | Real estate | 2026 |
| RS Property & Maintenance Ltd | Real estate | 2025 |
| RS Scaffold Solutions Limited | Construction | 2021 |
| Rsd-Eco Ltd | Administrative & support | 2025 |
| RT Construction Ltd | Construction | 2023 |
| Ruddy Electrics Ltd | Construction | 2025 |
| Rural Development Services Limited | Administrative & support | 1995 |
| S & L Crane Services Ltd | Administrative & support | 2013 |
| S & M Contractors (N.I.) Ltd | Manufacturing | 2017 |
| S Aujla Ltd | Hospitality | 2023 |
| S Line Autos NI Limited | Wholesale & retail | 2019 |
| S O'Doherty Ltd | Professional & scientific | 2016 |
| S&B MC Namee Construction Ltd | Construction | 2020 |
| S&R Boat Services Ltd | Administrative & support | 2019 |
| S.E.A.N. Psychology Services Ltd | Education | 2023 |
| S2S Capital Ltd | Other services | 2022 |
| Sallybrook Commercial Centre (N.I.) Ltd | Administrative & support | 2014 |
| Salon Select (NI) Limited | Wholesale & retail | 2011 |
| Sayers Machinery Service Ltd | Manufacturing | 2025 |
| SC Autosales Ltd | Wholesale & retail | 2026 |
| SC Property Consultants Ltd | Professional & scientific | 2022 |
| Scaffmart Limited | Construction | 2024 |
| School of Thought NI CIC | Education | 2026 |
| School-Aged, Play, Afterschools, Childcare & Educational (Space) Station C.I.C. | Education | 2016 |
| Scoop and CUP Ltd | Hospitality | 2022 |
| SD Adventures Ltd | Health & social care | 2025 |
| Sean O'Kane Joinery Limited | Manufacturing | 2026 |
| Select 1 & 2 Ltd | Real estate | 2022 |