| A Blue Limited | Wholesale & retail | 2000 |
| Absolute Technical Solutions Ltd | Construction | 2011 |
| Andrew Thomas James Ltd | Professional & scientific | 2019 |
| Bradfor Limited | Manufacturing | 1996 |
| Central Translations (NI) Limited | Professional & scientific | 1999 |
| Clerkin Elevation Ltd | Administrative & support | 2011 |
| D.P Upholstery & Furniture Repairs Ltd | Other services | 2022 |
| Esther Giving Ltd | Health & social care | 2019 |
| Ghan Filling Station Limited | Wholesale & retail | 2010 |
| Glen-Tel Limited | Construction | 2025 |
| John Rice Plastering Limited | Construction | 2006 |
| Kilbroney Timber Frame Limited | Construction | 2009 |
| Knockbarragh Developments Ltd | Construction | 2017 |
| Lmcc Ltd | Health & social care | 2018 |
| Loughview Project Solutions Ltd | Professional & scientific | 2016 |
| MAC PR Limited | Professional & scientific | 2005 |
| Millbay Investment Company Limited | Real estate | 2001 |
| MMB Point Bar Limited | Hospitality | 2017 |
| Mourne DEW Distillery Ltd | Manufacturing | 2017 |
| Mournebuilt Ltd | Construction | 2016 |
| North Track Plant Sales Ltd | Wholesale & retail | 2024 |
| Paul Hagerty & Co Limited | Professional & scientific | 2010 |
| Point Bar Property Limited | Real estate | 2017 |
| POT Hill Homes Ltd | Construction | 2015 |
| Right Tack Consultancy Ltd | Professional & scientific | 2019 |
| Ross Inns Limited | Hospitality | 2002 |
| Rostrevor and District Community Limited | Households | 2026 |
| Rostrevor Inn Ltd | Hospitality | 2013 |
| S Mackin Construction Limited | Construction | 2003 |
| Sandys Street Properties Limited | Real estate | 2011 |
| Tergo Solutions Ltd | Extraterritorial | 2016 |
| THE Schoolhouse Rostrevor Ltd | Hospitality | 2015 |
| Water Street Studio Holdings Limited | Financial services | 2025 |
| Xcell Innovation Technology Limited | Professional & scientific | 2018 |
| Youth With a Mission (Northern Ireland) Limited | Other services | 1995 |