| 124 Sports Management Ltd | Professional & scientific | 2020 |
| 32 North Limited | Wholesale & retail | 2020 |
| 3A the Parade Management Company Ltd | Households | 2017 |
| 3D Surveying Limited | Professional & scientific | 2015 |
| 46 Development Limited | Professional & scientific | 2010 |
| A Lennon Enterprises Limited | Wholesale & retail | 2020 |
| A Malcolm Hair Limited | Other services | 2025 |
| A.T. Deca Ltd | Real estate | 2000 |
| A1 Retail Enterprises NI Ltd | Wholesale & retail | 2026 |
| A1 Tree Services Limited | Construction | 2021 |
| A2B Energy Solutions Ltd | Energy | 2022 |
| AA Mitchell Enterprises Ltd | Financial services | 2019 |
| AB Mackin Holdings Limited | Manufacturing | 2017 |
| Accidentassessors Ltd | Professional & scientific | 2013 |
| Acrebrae Properties Limited | Real estate | 2001 |
| ACS Recovery Specialists Ltd | Wholesale & retail | 2023 |
| ACW Tullylish Ltd | Professional & scientific | 2025 |
| Adair Building Services Ltd | Construction | 2013 |
| Adrm Ltd | Other services | 2022 |
| Advance M&E Design Ltd | Professional & scientific | 2017 |
| Advent Energy and Technology Limited | Energy | 2022 |
| Advent Wind B Limited | Professional & scientific | 2023 |
| AF Autos Ltd | Wholesale & retail | 2018 |
| Agriad Ltd | Professional & scientific | 2024 |
| AI Ireland Limited | Information & communication | 2024 |
| AJM Engineering (N.I.) Ltd | Manufacturing | 2024 |
| Ajmcr Ltd | Real estate | 2024 |
| Albion Recycling (NI) Ltd | Extraterritorial | 2012 |
| Alderquay LLP | | 2007 |
| Algimayn Ltd | Professional & scientific | 2019 |
| ALL Direct Furniture Limited | Wholesale & retail | 2003 |
| ALL Fired UP Stoves Ltd | Wholesale & retail | 2013 |
| ALL in Motion Ltd | Education | 2026 |
| ALL Trade Construction ATT Limited | Wholesale & retail | 2019 |
| Allez Escapes Limited | Administrative & support | 2025 |
| Alpha Gym (N.I.) Ltd | Arts & recreation | 2022 |
| Alternative Energy Products Limited | Construction | 2009 |
| Alternative Heat Limited | Construction | 2005 |
| Altitude 32 Ltd | Information & communication | 2025 |
| AM3 Property Ltd | Households | 2026 |
| AMA Property Lettings Ltd | Real estate | 2016 |
| Amavi INK Ltd | Health & social care | 2020 |
| AMD Solutions Limited | Health & social care | 2024 |
| Amron Services Limited | Real estate | 2018 |
| AMS Building Contracts Ltd | Construction | 2023 |
| Andante Investments Limited | Real estate | 2021 |
| Andrew Bruce Casey Hair Limited | Other services | 2024 |
| Angel Communications Ltd | Arts & recreation | 2021 |
| Angling First Ltd | Agriculture & fishing | 2003 |
| Anna's Number Limited | Information & communication | 2013 |
| Annaclone Construction Limited | | 2007 |
| Annaclone Historical Society | Arts & recreation | 2012 |
| Anndale Transport Limited | Transport & logistics | 2015 |
| Apache Pizza (Banbridge) 786 Limited | Hospitality | 2018 |
| APM Estimating Ltd | Professional & scientific | 2025 |
| Appl Ltd | Hospitality | 2026 |
| AR Bouncy Castles Limited | Arts & recreation | 2025 |
| AR Rahmah Ltd | Wholesale & retail | 2026 |
| Arbour Investments Limited | Households | 2018 |
| ARCHERY4U Limited | Arts & recreation | 2019 |
| Ardmore Enterprises IRL Limited | Wholesale & retail | 2020 |
| Ardmore Ventures Limited | Financial services | 2025 |
| Arjax Ltd | Professional & scientific | 2022 |
| Arkivolt Ltd | Professional & scientific | 2025 |
| Armagh Dental Clinic Ltd | Health & social care | 2025 |
| Armap Ltd | Agriculture & fishing | 2013 |
| Arsal Enterprises Ltd | Wholesale & retail | 2025 |
| Arthur J Downey & Co Solicitors Ltd | Professional & scientific | 2022 |
| Artie Annie Ltd | Arts & recreation | 2022 |
| ASH Tree Poultry Ltd | Agriculture & fishing | 2014 |
| Ashwood Kitchens Limited | Construction | 2019 |
| AT the Printers Ltd | Manufacturing | 2018 |
| Atlanticus Digital Ltd | Information & communication | 2018 |
| Atlas Distributionuk Limited | Wholesale & retail | 2025 |
| Atlas Group Security Ltd | Administrative & support | 2024 |
| Audugreat Business Services Limited | Wholesale & retail | 2025 |
| Auto Supplies (Banbridge) LLP | | 2008 |
| Automoto UK Ltd | Wholesale & retail | 2016 |
| Autonomyfp Limited | Financial services | 2014 |
| Autosupplies BB Ltd | Wholesale & retail | 2026 |
| AXION4 Ltd | Information & communication | 2026 |
| B Positive Adam Ltd | Wholesale & retail | 2023 |
| Baider Ltd | Information & communication | 2017 |
| Baird Brothers Transport Ltd | Transport & logistics | 2016 |
| Ballinaskeagh Grains Limited | Wholesale & retail | 1993 |
| Ballinaskeagh Properties Limited | Real estate | 2007 |
| Ballybrick Ltd | Construction | 2013 |
| Ballybrick Properties Ltd | Real estate | 2024 |
| Ballydown Kids Academy Limited | Education | 2003 |
| Ballydown Properties Ltd | Construction | 2021 |
| Ballymoney Hill Estates Ltd | Real estate | 2004 |
| Ballyshiel Limited | Health & social care | 2016 |
| Ballywillin Gardens Management Company Limited | Households | 2024 |
| Bambrick Family Wealth Management Limited | Real estate | 2024 |
| BAN Trustees Limited | Administrative & support | 2023 |
| Banbridge & District Motor Cycle Club Limited | Other services | 1967 |
| Banbridge Angling Club | Arts & recreation | 1999 |
| Banbridge Cars Ltd | Wholesale & retail | 2024 |
| Banbridge Hotels Ltd | Hospitality | 2015 |
| Banbridge Motor Hub Ltd | Wholesale & retail | 2025 |