| PS Joinery (N.I.) Ltd | Construction | 2018 |
| PSD Accountancy Ltd | Professional & scientific | 2025 |
| Psych Consult Belfast Ltd | Health & social care | 2020 |
| PTF Holdings Limited | Professional & scientific | 2021 |
| Pthree Builders Ltd | Construction | 2025 |
| Pullytean Wind Farm Limited | Energy | 2025 |
| Pulseair Compressors Vacuum Pumps+Blowers Ltd | Energy | 2024 |
| Pulseair M&E Ltd | Energy | 2019 |
| Pure Filtration Ltd | Wholesale & retail | 2024 |
| Pure Kids Ltd | Wholesale & retail | 2016 |
| Pure Roast Coffee Limited | Manufacturing | 2009 |
| Puresoft Ltd | Information & communication | 2004 |
| Purifry Ltd | Hospitality | 2009 |
| Purple Marketing & Distribution Limited | Wholesale & retail | 2004 |
| Purple Promotions and Print Limited | Manufacturing | 2019 |
| Pwqs Ltd | Professional & scientific | 2024 |
| Qsee Limited | Information & communication | 2021 |
| Quality Flooring Ltd | Construction | 2024 |
| Quality Global Funding Limited | Professional & scientific | 2021 |
| Quarterlands Ltd | Professional & scientific | 2020 |
| Queer Belfast CIC | Health & social care | 2026 |
| Quinnovation Consulting Limited | Professional & scientific | 2019 |
| Quinta Holdings Limited | Real estate | 2023 |
| QW Contracts Limited | Construction | 2014 |
| R & M Joinery Ltd | Construction | 2011 |
| R a Johnston | Construction | 2017 |
| R a M Ballinderry Ltd | Manufacturing | 2022 |
| R&R Continental Food Ltd | Wholesale & retail | 2025 |
| R&R Logistics (NI) Limited | Manufacturing | 2013 |
| R&R Select Autos Limited | Wholesale & retail | 2025 |
| R-Space Gallery | Arts & recreation | 2011 |
| R.J. Barr MD Ltd | Health & social care | 2011 |
| R.S. Johnston Limited | Manufacturing | 2020 |
| RAB Motors Ltd | Wholesale & retail | 2024 |
| Radiant Rebel Ltd | Wholesale & retail | 2025 |
| Radio Lisburn Live CIC | Information & communication | 2021 |
| Radsni Ltd | Wholesale & retail | 2021 |
| Railway Street Management Company Limited | Real estate | 2017 |
| Rainey Specialist Contractors Ltd | Other services | 2008 |
| Raise the Bar Fitness Ltd | Arts & recreation | 2018 |
| Raleagh Holdings Ltd | Financial services | 2023 |
| Raloo Fishery & Livery Ltd | Agriculture & fishing | 2017 |
| Ralph's Events Limited | Arts & recreation | 2023 |
| Ralph's Moira Limited | Hospitality | 2019 |
| RAM Foundation | Education | 2017 |
| Ramfire Fire Safety Services Ltd | Professional & scientific | 2015 |
| Rangonwu Ltd | Wholesale & retail | 2026 |
| Rare Grazing Ltd | Hospitality | 2020 |
| RAS Solutions Limited | Wholesale & retail | 2024 |
| Ratchet & Crank (N.I.) Limited | Manufacturing | 2020 |
| Rathdown Close Management Limited | | 2005 |
| Rathlane | Health & social care | 2012 |
| Rathlin Manor Ltd. | Hospitality | 2018 |
| Raxx Ltd | Professional & scientific | 2025 |
| Rayash Limited | Real estate | 2023 |
| Rb&F Co Ltd | Health & social care | 2023 |
| Rbeka Limited | Professional & scientific | 2022 |
| RC Aquatics Limited | Wholesale & retail | 2025 |
| Rccg Place of Victory for ALL Nations, Lisburn Ltd | Other services | 2024 |
| RCS (NI) Ltd | Other services | 2012 |
| Reaney Properties Ltd | Households | 2022 |
| Recodecbt Ltd | Health & social care | 2025 |
| Red and Beauty Ltd | Wholesale & retail | 2024 |
| Red Aspect Medical Services Ltd | Professional & scientific | 2025 |
| Red Chestnut Farms Limited | Agriculture & fishing | 2024 |
| Red Chestnut Group Ltd | Financial services | 2024 |
| Red Dragon Agency Limited | Administrative & support | 2010 |
| Red Eyes Productions Ltd | Arts & recreation | 2015 |
| Red Kettle Limited | Wholesale & retail | 2013 |
| Reddy ENT Ltd | Health & social care | 2018 |
| Reena Group Ltd | Financial services | 2021 |
| Referral Rainmaker Limited | Administrative & support | 2020 |
| Reflect Quality Limited | Professional & scientific | 2022 |
| Reflections Bridal Studio Ltd | Wholesale & retail | 2006 |
| Regain Physio NI Ltd | Health & social care | 2023 |
| Regal Theatres Limited | Extraterritorial | 1932 |
| Regional Asset Management and Property Development Limited | Construction | 2018 |
| Regional Credit and Finance Limited | Financial services | 1994 |
| Rejuvenate Aesthetic Services Ltd | Health & social care | 2019 |
| Reko Invest LP | | 2018 |
| Rekord Productions Ltd | Information & communication | 2018 |
| Relocate to Ireland Limited | Administrative & support | 2026 |
| Renoglow Property Services Ltd | Construction | 2026 |
| Reshaping Ltd | Professional & scientific | 2025 |
| Resonate Branding Ltd | Manufacturing | 2018 |
| Responsible Plastic Management Program CIC | Professional & scientific | 2019 |
| Restoration Ministries Limited | Other services | 2002 |
| Retail Asset Management Strategy Limited | Real estate | 2025 |
| Revival Management Ltd | Real estate | 2025 |
| Revival Properties Ltd | Construction | 2020 |
| Revival Racing Motorcycle Club Ltd | Arts & recreation | 2019 |
| Revive Plastic Surgery Ltd | Health & social care | 2026 |
| Revolution Cleaning Service NI Homes Ltd | Administrative & support | 2024 |
| Revolution Security & Facilities Management Ltd | Administrative & support | 2020 |
| Rezara Investments Limited | Real estate | 2020 |
| RG Signalling Limited | Manufacturing | 2025 |
| RH Consultancy Group Ltd | Administrative & support | 2025 |
| RH Consultancy Ltd | Administrative & support | 2025 |
| RH Home Solutions Ltd | Construction | 2015 |
| Riada Capital Limited | Construction | 2019 |