| RBD Farms Ltd | Construction | 2019 |
| RBF Property Ltd | Construction | 2019 |
| RBY Holdings Ltd | Financial services | 2023 |
| RC Rebar Ltd | Construction | 2020 |
| RD Donaghy Properties Ltd | Real estate | 2026 |
| RD Entertainment Ltd | Arts & recreation | 2023 |
| RD Financials Ltd | Construction | 2023 |
| RDF Project Planning & Management Ltd | Construction | 2015 |
| Rdtax Ltd | Extraterritorial | 2015 |
| Reaghmore Properties Ltd | Real estate | 2022 |
| Really Good QVS Ltd | Hospitality | 2007 |
| Realtons Windustry Ltd | Energy | 2015 |
| Recon Wind Holding Ltd | Other services | 2023 |
| Recyco Limited | Water & waste | 2004 |
| Red Hollows Ltd | Wholesale & retail | 2022 |
| Reforme Pilates Studio Ltd | Arts & recreation | 2023 |
| REI- Wind Holding Ltd | Professional & scientific | 2020 |
| Rekom ROK Capital Partners Limited | Financial services | 2025 |
| Remackan Energy Limited | Energy | 2015 |
| Remackin Construction Ltd | Construction | 2017 |
| Replica Models Limited | Extraterritorial | 2014 |
| Resfi Limited | Construction | 2025 |
| Retreat Properties Ltd | Extraterritorial | 2014 |
| Retreat Property Services Ltd | Professional & scientific | 2014 |
| RGE Electrical Ltd | Construction | 2022 |
| RHM Engineering Ltd | Professional & scientific | 2022 |
| Rian Management Ltd | Financial services | 2022 |
| Richard Clements & Co | Professional & scientific | 2003 |
| Richmond Hill Management (NI) Limited | Real estate | 2014 |
| Riddell Atvs Limited | Wholesale & retail | 2003 |
| Right Choice Training Ltd | Administrative & support | 2003 |
| Rilion Gracie Omagh Ltd | Other services | 2025 |
| Rise Diagnostics Ltd | Health & social care | 2025 |
| Rite Price Carpets, Flooring & Interiors Limited | Wholesale & retail | 2019 |
| Rithe Engineering Limited | Construction | 2019 |
| River ROW Arts Company Limited | Arts & recreation | 2010 |
| River Run Group Limited | Extraterritorial | 2016 |
| Riverbend Properties Ltd | Real estate | 2025 |
| Riverside 2025 Ltd | Hospitality | 2025 |
| Riverside RE Limited | Real estate | 2021 |
| Riverview Property Developments Ltd | Real estate | 2005 |
| RJ Clements Ltd | Agriculture & fishing | 2023 |
| RJ MC Carney Hire Ltd | Administrative & support | 2024 |
| RJ Woodland Services Ltd | Agriculture & fishing | 2017 |
| RMC Car Repairs Ltd | Wholesale & retail | 2021 |
| RMC Tyres and Repairs Limited | Manufacturing | 2017 |
| Roadmixer International Limited | Manufacturing | 2014 |
| Roar Roar Dinosaur Ltd | Education | 2023 |
| Robin Adair Ltd | Wholesale & retail | 2025 |
| Rock in the Road Limited | Hospitality | 2023 |
| Rock Road Property Ltd | Real estate | 2026 |
| Rock Solid Fitness (NI) Ltd | Wholesale & retail | 2025 |
| Rocket Flair Studios Ltd | Information & communication | 2017 |
| Rockfoot Engineering Ltd | Professional & scientific | 2023 |
| Rockfoot Magnetics Ltd | Manufacturing | 2023 |
| Rockhill Communications NI Ltd | Information & communication | 2025 |
| Rocklin Limited | Real estate | 2025 |
| Rockmor Enterprises Ltd | Financial services | 2020 |
| Rockstown Services Ltd | Construction | 2023 |
| Roddy Farm's Ltd | Agriculture & fishing | 2010 |
| Rodonco Ltd | Information & communication | 2020 |
| Rohalicon Ltd | Energy | 2025 |
| Ronan Travers Haulage Ltd | Transport & logistics | 2020 |
| Roofrightandgroundworks Ltd | Construction | 2026 |
| Roomsmart Ltd | Hospitality | 2022 |
| Rory P Gormley & Co. Ltd | Professional & scientific | 2009 |
| Roscor LLP | | 2015 |
| Rosegift Respite Ltd | Health & social care | 2026 |
| Rosemount Partnership Ltd | Real estate | 2014 |
| Roshca Ltd | Financial services | 2018 |
| Rotary NI Donations Limited | Professional & scientific | 2022 |
| Rouskey Community and Development Association | Arts & recreation | 1999 |
| Routingburn Ltd | Extraterritorial | 2025 |
| Rowan Crescent Limited | Wholesale & retail | 2016 |
| RPM IT Services Ltd | Administrative & support | 2014 |
| Rpml Engineering Ltd | Wholesale & retail | 2021 |
| RS Psychology Services Ltd | Education | 2023 |
| RTC Direct Ltd | Administrative & support | 2008 |
| Russell Managh Hydraulics Ltd | Manufacturing | 2014 |
| Ryan Mcgrath Opticians Ltd | Health & social care | 2015 |
| Ryda Construction Ltd | Construction | 2022 |
| Rymat Holdings Ltd | Construction | 2020 |
| Rymat Ltd | Construction | 2017 |
| S & a Groundworks Ltd | Construction | 2017 |
| S & M Products (N.I.) Ltd | Manufacturing | 2017 |
| S & M Products Ltd | Manufacturing | 2024 |
| S Clarke Road Contracts Ltd | Administrative & support | 2019 |
| S Darcy Construction Ltd | Construction | 2005 |
| S Mcbride Concrete Ltd | Manufacturing | 2018 |
| S&S Getaways Limited | Hospitality | 2020 |
| S. Conaty Ltd | Construction | 2026 |
| S.C Kitchens & Bedrooms Ltd | Manufacturing | 2020 |
| Sadie's Pantry Ltd | Manufacturing | 2025 |
| Sadift Limited | Other services | 2016 |
| Safecert Awards Ltd | Education | 2011 |
| Safely Home Ltd | Information & communication | 2019 |
| Safestat Ltd | Professional & scientific | 2024 |
| Sail to Success Ltd | Professional & scientific | 2025 |
| Sally Group Trading Limited | Construction | 2025 |
| Sally O'Briens Ltd | Hospitality | 2004 |