| 2 Captain Street Management Limited | Households | 2019 |
| 6D-DEMENTIA Ltd. | Professional & scientific | 2023 |
| Adhd Diagnostics Ltd | Health & social care | 2026 |
| AGB Contracts Ltd | Construction | 2013 |
| Agmgt Limited | Real estate | 2018 |
| Alan Lyons Limited | Construction | 2018 |
| Alsar Properties Ltd | Real estate | 2016 |
| AM Developments (NI) Limited | Construction | 2007 |
| Amber Electrical Services (Ireland) Ltd | Construction | 2008 |
| Antrim Estates (N.I.) Limited | Financial services | 2010 |
| Arcath Properties Ltd | Real estate | 2006 |
| Archibald Trading Limited | Other services | 2022 |
| Artona Textiles Limited | Real estate | 1971 |
| Astronim Ltd | Wholesale & retail | 2023 |
| Atlantic Physiotherapy Limited | Professional & scientific | 2016 |
| Atlantic Vitality Limited | Health & social care | 2025 |
| Atlantis Services (Portrush) Ltd | Households | 2006 |
| Awaken North Coast Ltd | Hospitality | 2020 |
| B & E Security Systems Limited | Administrative & support | 1999 |
| Babadoh Ltd | Professional & scientific | 2020 |
| Ballyreagh Digital Ltd | Information & communication | 2025 |
| Ballyreagh Ltd | Hospitality | 2012 |
| Beach View Apartments Management Company Limited | Extraterritorial | 2013 |
| Bear ALL Ltd | Other services | 2023 |
| Between Clubs Ltd | Manufacturing | 2026 |
| BKS (NI) Ltd | Professional & scientific | 2015 |
| BKS Holdings (N.I.) Ltd | Professional & scientific | 2019 |
| Blackstone Exclusive Travel Limited | Administrative & support | 2023 |
| Blair's Caravans Limited | Wholesale & retail | 1978 |
| Bluflare Ltd | Professional & scientific | 2024 |
| Brew Bars Limited | Hospitality | 2014 |
| C&V Hospitality Ltd | Hospitality | 2023 |
| Cantley Limited | Wholesale & retail | 2020 |
| Carney Investments Limited | Construction | 2003 |
| Causeway Artisan Foods Ltd | Manufacturing | 2020 |
| Causeway Bay B&B Ltd | Real estate | 2017 |
| Causeway Coasteering Ltd | Arts & recreation | 2021 |
| Causeway Coasters Ltd | Wholesale & retail | 2016 |
| Causeway Group Holdings Limited | Financial services | 2020 |
| Causeway Homes Limited | Construction | 2014 |
| Causeway Occupational Therapy Ltd | Health & social care | 2022 |
| Causeway Surveys Limited | Professional & scientific | 2014 |
| Causewayview Management Limited | Households | 2002 |
| Cloud Corp Vaping Limited | Manufacturing | 2015 |
| Cloughorr Investments Limited | Hospitality | 1998 |
| Cloughorr Management Company Limited | Other services | 2007 |
| CMB Enterprises Ltd | Wholesale & retail | 2017 |
| Cookstown Battery and Auto Services Limited | Real estate | 1963 |
| Corbel Investments Limited | Real estate | 1987 |
| Craigvara Management Limited | Households | 2001 |
| Crinan Limited | Construction | 2024 |
| Cryora Ltd | Wholesale & retail | 2025 |
| Culzean Estates Limited | Real estate | 1997 |
| Culzean Properties (Number 2) Limited | Hospitality | 2006 |
| Curranpoint Property Ltd | Real estate | 2024 |
| Cyberwave Technologies Limited | Information & communication | 2025 |
| D&J Developers Limited | Construction | 2006 |
| D.J. Lockhart Limited | Construction | 1978 |
| Daisy Chain Inc Ltd | Professional & scientific | 2019 |
| Destination Belfast Ltd | Hospitality | 2023 |
| DHU Varren Apartments Management Company Limited | Households | 2026 |
| DHU Varren Park South Management Limited | Households | 1993 |
| DHU Varren Property Management Company Limited | Households | 2020 |
| Dunluce PLC | Financial services | 1992 |
| Dynamic Vehicles NI Ltd | Wholesale & retail | 2016 |
| E M L Fire & Security Limited | Professional & scientific | 2000 |
| Edenmore Properties Limited | Construction | 1984 |
| Eglinton Property Management Northern Ireland Limited | Households | 2006 |
| Europe GAP Year Limited | Education | 2023 |
| Ezra J. Property Limited | Real estate | 2024 |
| Fairways Cloonavin Ltd | Health & social care | 2014 |
| Fairways Duncreggan Ltd | Health & social care | 2014 |
| Fairways Woodford Ltd | Health & social care | 2014 |
| Flat CAP Adventurers Ltd | Wholesale & retail | 2021 |
| Fletcher & Gordon Ltd | Real estate | 2001 |
| FOC NI Group Limited | Financial services | 2026 |
| Fogie Ltd | Arts & recreation | 2022 |
| Gallery 1608 Ltd | Arts & recreation | 2016 |
| Glyco Developments Limited | Construction | 1998 |
| GMC Graphics Limited | Professional & scientific | 2005 |
| Goldrush Portrush Limited | Hospitality | 2018 |
| Golightlee Limited | Information & communication | 2018 |
| Gortlena Ltd | Public administration | 2019 |
| Grange Hill Management Company Limited | Households | 2022 |
| Green Consortium Ltd. | Financial services | 2025 |
| Hampton Windows Limited | Manufacturing | 2014 |
| Harbour Mews Management Limited | Real estate | 1998 |
| Harry Gregg Foundation | Arts & recreation | 2015 |
| Heart Scan Portrush Ltd | Health & social care | 2024 |
| Heirwell Ltd | Information & communication | 2025 |
| High Prim Ltd | Real estate | 2026 |
| Houston Homes (NI) Limited | Construction | 2010 |
| Huston Development Limited | Construction | 2021 |
| Hutchman Holiday Homes Ltd | Real estate | 2017 |
| Hyperfresh RAW Ltd | Manufacturing | 2021 |
| I Care Portrush Ltd | Health & social care | 2017 |
| Icehouse Wellness Co. Ltd. | Real estate | 2025 |
| Industry DC Ltd | Arts & recreation | 2024 |
| Irish Black Butter Ltd | Manufacturing | 2021 |
| J and P Catering LLP | | 2014 |