| NI Accident Services Limited | Wholesale & retail | 2021 |
| NI Heritage and Rural Life Society CIC | Arts & recreation | 2017 |
| Nispares Ltd | Wholesale & retail | 2016 |
| NJ Mcconnell Ltd | Information & communication | 2021 |
| Noel Eakin & Sons Limited | Wholesale & retail | 1993 |
| Nordstern Consultants Ltd | Professional & scientific | 2025 |
| North Armagh Feeds Ltd | Wholesale & retail | 2015 |
| North Armagh Motorcycle & Car Club Limited | Arts & recreation | 1965 |
| Northern Batteries Limited | Wholesale & retail | 2025 |
| Northern Plastics (Upvc) Limited | Extraterritorial | 1990 |
| NT Financial Services Ltd | Financial services | 2022 |
| Number Plate Components Limited | Manufacturing | 2023 |
| Oakrone Investments Ltd | Real estate | 2025 |
| Oakview Retirement Ltd | Real estate | 2024 |
| Oakwood Developments NO. 1 Limited | Construction | 2018 |
| Olive & Vine Events Ltd | Hospitality | 2023 |
| Oliver Mccann Limited | Manufacturing | 2022 |
| Orchard Grove Canneries, Limited | Extraterritorial | 1958 |
| Outside Catering by Perfect Blend Ltd | Hospitality | 2025 |
| P&C Ludlow Ltd | Wholesale & retail | 2018 |
| P.B.C.(N.I) Ltd | Wholesale & retail | 2023 |
| Paddocks Carrowdore Management Limited | Households | 2024 |
| Panojo Manufacturing Ltd | Manufacturing | 2022 |
| Parkr Ltd. | Manufacturing | 2018 |
| Patc's Ltd | Hospitality | 2016 |
| Pathway Wealth Management Limited | Financial services | 2018 |
| Patterson Group Holdings Ltd | Financial services | 2026 |
| Patterson Plant Sales Ltd. | Construction | 2011 |
| PBT Properties Limited | Real estate | 2015 |
| Performa Sports Ltd | Information & communication | 2010 |
| Performance 47 Management Ltd | Professional & scientific | 2025 |
| Philip Graham Vehicle Repairs Limited | Wholesale & retail | 2008 |
| PL Group UKI Ltd | Construction | 2023 |
| PLH Enterprises Ltd | Arts & recreation | 2013 |
| Plumbrite Ltd | Construction | 2018 |
| Portadown Christian Centre | Other services | 2018 |
| Portadown Coldstore Ltd | Transport & logistics | 2021 |
| Portadown Locksmiths Limited | Administrative & support | 2004 |
| Portadown Mortgage Shop Limited | Financial services | 2012 |
| Portadown Specsavers Hearcare Limited | Wholesale & retail | 2021 |
| Portadown Specsavers Limited | Wholesale & retail | 1995 |
| Portadown Visionplus Limited | Wholesale & retail | 1995 |
| Portcullis Developments Limited | | 2006 |
| Portnablagh Limited | Financial services | 2023 |
| Portree Two Limited | Real estate | 2025 |
| Powerline Networks Limited | Information & communication | 2014 |
| PPC Environmental Ltd | Manufacturing | 2011 |
| Premier Paving Contracts Ltd | Construction | 2016 |
| Premium Hides & Skins by DM Ltd | Wholesale & retail | 2025 |
| Prempave Contracts Ltd | Construction | 2026 |
| Prfc Trustee Company Limited | Arts & recreation | 2010 |
| Price Derryhale Ltd | Agriculture & fishing | 2017 |
| Protosport 93 Limited | Manufacturing | 2016 |
| Quailhollow Kennels Limited | Manufacturing | 2025 |
| Quest Auto Trader Limited | | 1989 |
| Quinn Bros (NI) Ltd | Other services | 2013 |
| Quintec Ltd | Professional & scientific | 2016 |
| QWP Limited | Real estate | 2026 |
| Rage Room N I Limited | Arts & recreation | 2023 |
| Ragos Ltd | Information & communication | 2018 |
| Rathfriland Motor Club Limited | Arts & recreation | 2001 |
| Rathfriland Road Development Limited | Construction | 2024 |
| Recon Group Ltd | Financial services | 2022 |
| Recon Resources Ltd | Manufacturing | 2022 |
| Recon Waste Management Ltd | Water & waste | 2011 |
| Regent Park Developments Limited | Construction | 2018 |
| Regents Park (Ards) Management Ltd | Households | 2017 |
| Renovation Squad Ltd | Construction | 2026 |
| Retip Ireland Ltd | Wholesale & retail | 2021 |
| Rhubarb Boutique Ltd | Wholesale & retail | 2015 |
| Rich Makes Ltd | Manufacturing | 2021 |
| Richard Hunniford Ltd | Agriculture & fishing | 2018 |
| Richardson Holdings Limited | Financial services | 2006 |
| Richardson Meats Ltd | Wholesale & retail | 2024 |
| Ridops Ltd | Information & communication | 2018 |
| RM 1 Holdings Ltd | Financial services | 2022 |
| Robinson Roofing Limited | Construction | 2008 |
| Rocco 25 Ltd | Hospitality | 2025 |
| Roderick Joyce Developments Limited | Construction | 2005 |
| Romac Properties Ltd | Real estate | 2015 |
| Romaka Ltd | Real estate | 2020 |
| Rosara Limited | Real estate | 2015 |
| Rosevale Farm Ltd | Agriculture & fishing | 2025 |
| Roslyn Developments Ltd | Construction | 2021 |
| Roughan Horseboxes Ltd | Manufacturing | 2014 |
| Rtajnstc Properties Ltd | Real estate | 2025 |
| Rushbrook Sales Ltd | Wholesale & retail | 2016 |
| Rushmere Coffee Limited | Hospitality | 2025 |
| S Boylan Garden & Patio Products Ltd | Wholesale & retail | 2021 |
| S M Livestock Ltd | Agriculture & fishing | 2019 |
| S Muldoon Agricultural Services Ltd | Wholesale & retail | 2021 |
| S'Agaro Properties Ltd | Extraterritorial | 2007 |
| Saber Playbooks Ltd | Professional & scientific | 2025 |
| Sabina Properties Limited | Construction | 2006 |
| Salters Powerwashers Limited | Manufacturing | 2022 |
| Sapphire Contracts Limited | Construction | 2022 |
| Scotch Street Filling Station Ltd | Wholesale & retail | 2024 |
| SD Donnelly T/As Sona Kitchens Ltd | Manufacturing | 2026 |
| SDL Supplies Ltd | Wholesale & retail | 2023 |
| Seagoe Ministries | Other services | 2010 |