| Newell Aggregates Limited | Mining & quarrying | 2003 |
| Newgrange Homes Limited | Construction | 2004 |
| Newry Crash Repair Centre Ltd | Wholesale & retail | 2002 |
| Newry Golf Inn Limited | Hospitality | 1990 |
| Nicole Enterprises Ltd | Hospitality | 2001 |
| Norbrae Developments Ltd | Manufacturing | 2003 |
| North Down & Ards Women's AID | Health & social care | 1996 |
| North Down Community Network | Health & social care | 2004 |
| North Down Hotels Limited | Real estate | 1970 |
| Northberry Drinks (Northern Ireland) Limited | Hospitality | 1978 |
| Northern Ireland Jeans Co. Ltd | | 1998 |
| Nutec Limited | | 1994 |
| Obaro Ltd | Administrative & support | 2007 |
| OJO Ltd | Information & communication | 2004 |
| OK Electrix Ltd | Construction | 2003 |
| Optim Performance Management Ltd | Professional & scientific | 2006 |
| Ormonde Enterprises Limited | Real estate | 1989 |
| OUT of the Box Books Ltd | Information & communication | 2019 |
| P and B TA Limited | Wholesale & retail | 1988 |
| Pacific Dance Agency Limited | | 1995 |
| Painted Earth Ltd | Wholesale & retail | 2020 |
| Panther Haulage Limited | | 1991 |
| Park Estate Company (Belfast) Limited | Real estate | 1963 |
| Party Pixies (NI) Ltd | Arts & recreation | 2006 |
| PAT Breen Developments Limited | Construction | 2007 |
| Patterson Protective Coatings Ltd | Wholesale & retail | 1999 |
| Peacehaven Care Services Limited | Health & social care | 2006 |
| Pelirocco Ltd | | 2004 |
| Peninsula Healthy Living Partnership Limited | Health & social care | 2002 |
| Peninsula Mechanical Limited | Construction | 2016 |
| People and Places Limited | Extraterritorial | 1971 |
| Peter Mark (N.I.) Limited | Other services | 1989 |
| Philips Electronics Ireland Limited | | 1999 |
| Phillips (Holdings) Limited | Construction | 1961 |
| Phillips (Lion Motors) Limited | Construction | 1973 |
| Phoenix Healthcare Holdings Limited | Financial services | 2003 |
| Play and Leisure Services Ltd | Education | 2004 |
| PLS Investments Limited | Real estate | 2001 |
| Pneumatic Equipment Services Limited | Manufacturing | 1992 |
| Positive Futures: Achieving Dreams. Transforming Lives. | Health & social care | 1995 |
| Praetorian Security International Limited | Professional & scientific | 2006 |
| Purity Hemp Company Ltd | Wholesale & retail | 2018 |
| Quails Fine Foods Limited | Wholesale & retail | 2003 |
| R G Graham & Sons Limited | Construction | 2003 |
| R.L. Annett Limited | Transport & logistics | 2002 |
| Rathcoole Filling Station Limited | Wholesale & retail | 2005 |
| Rathen Enterprises Limited | | 1992 |
| Rathfriland and District Regeneration Company Ltd. | Other services | 1994 |
| RAY Grahams Ltd | Wholesale & retail | 1978 |
| Redray Films Ltd | Information & communication | 2006 |
| RJM (NI) Limited | Construction | 2003 |
| Rodgers Formwork Ltd | Construction | 2004 |
| Rooney International Coach Hire Limited | Transport & logistics | 2007 |
| Rostrevor Property Developments Limited | Construction | 2001 |
| Rusmac Properties Limited | Construction | 2005 |
| RWP (IRL) Ltd | Water & waste | 2007 |
| Ryan Rogan Contracts Limited | Construction | 2007 |
| S & R Diamonds Limited | | 2006 |
| S G Jones & SON Limited | Wholesale & retail | 2004 |
| S J Mccreight (Potatoes) Limited | Agriculture & fishing | 1983 |
| S Matthews Limited | Construction | 2007 |
| S.G.Mckibbin & Co.Limited | Construction | 1970 |
| S.H. Long Produce Ltd | Agriculture & fishing | 1998 |
| Saba Investments Limited | Construction | 1990 |
| Sands END Trailer and Boat Park Limited | Real estate | 1955 |
| SCA Packaging Limited | | 1989 |
| Science Friction Limited | Manufacturing | 2003 |
| Scissors (Newry) Limited | Other services | 2005 |
| Scrabo Investments Limited | Real estate | 1960 |
| SEK Limited | Agriculture & fishing | 1998 |
| Septembers-Mcconnells International Communications Group Limited | Professional & scientific | 1991 |
| Servicecare (I) Limited | Wholesale & retail | 1996 |
| Silkstone Properties Limited | Real estate | 2006 |
| Singenium Limited | Professional & scientific | 2001 |
| Sitom Ltd | Extraterritorial | 2006 |
| Smarts (NI) Limited | Professional & scientific | 1990 |
| Snaubs Limited | Wholesale & retail | 1978 |
| Spa Pallet Services Limited | Manufacturing | 1999 |
| Spatec (N.I.) Limited | Wholesale & retail | 1986 |
| Spratt Financial Services Limited | Financial services | 2004 |
| Springvale Developments Limited | Extraterritorial | 2007 |
| ST Hanna Building Contracts Limited | Construction | 2003 |
| Steeple Hill Limited | Health & social care | 2008 |
| Stephen Robinson (Farms) Limited | Agriculture & fishing | 1998 |
| Stephen Robinson (Tractors) Limited | Wholesale & retail | 1990 |
| Stewart and Gibson Ltd | Wholesale & retail | 1919 |
| Stewarts of Ballymena (Holdings) Limited | Professional & scientific | 2008 |
| T G M Software Solutions Limited | Information & communication | 2003 |
| T.S. Foods Limited | Manufacturing | 1980 |
| T.S.I. Portonovo 038 Club Limited | Hospitality | 1985 |
| T.S.I. Portonovo 119 Club Limited | Other services | 1985 |
| T.S.I. Portonovo 123 Club Limited | Hospitality | 1985 |
| T.S.I. Portonovo 129 Club Limited | Hospitality | 1985 |
| T.S.I. Portonovo 131 Club Limited | Hospitality | 1985 |
| T.S.I. Portonovo 133 Club Limited | Other services | 1985 |
| T.S.I. Portonovo 135 Club Limited | Hospitality | 1985 |
| T.S.I. Portonovo 237 Club Limited | Extraterritorial | 1985 |
| TAF Limited | Construction | 2000 |
| Tannyoky Guns & Ammo Ltd | Wholesale & retail | 2008 |
| THE Ballykelly Group Ltd | Manufacturing | 2008 |