| Azul Dearg Ltd | Education | 2023 |
| Azur Nimbus Limited | Professional & scientific | 2023 |
| B & C Mcmahon Ltd | Real estate | 2023 |
| B Campbell Fish Ltd | Agriculture & fishing | 2011 |
| B Connell Engineering Ltd | Manufacturing | 2018 |
| B D Brickwork Ltd | Construction | 2008 |
| B J Trading Limited | Wholesale & retail | 2016 |
| B K Hair Loss Clinic Ltd | Other services | 2023 |
| B Lively & Sons Ltd | Wholesale & retail | 2015 |
| B M Steel Fabrications Limited | Manufacturing | 2004 |
| B M X Trading Ltd | Wholesale & retail | 2026 |
| B Rodgers Timberframe Ltd | Construction | 2021 |
| B S P Contracts Ltd | Construction | 2012 |
| B&D Property Developments Limited | Construction | 1999 |
| B&M Farms Ltd | Agriculture & fishing | 2018 |
| B&M Mechanical Ltd | Construction | 2024 |
| B. Reel Motors Limited | Wholesale & retail | 2008 |
| B.Mehigan Consultant Ltd | Health & social care | 2010 |
| B1 Property Management Ltd | Real estate | 2020 |
| BA Morgan Contracts Ltd | Construction | 2024 |
| Baba ME Newry Limited | Wholesale & retail | 2011 |
| Babalyon Limited | Real estate | 2017 |
| Backrock Developments Ltd | Construction | 2012 |
| Backrock Limited | Construction | 2019 |
| Bagot Investments Limited | Real estate | 2013 |
| Baker Systems L.P. | | 2017 |
| Bakery Services Limited | Manufacturing | 2021 |
| Baking Pancakes Limited | Manufacturing | 2025 |
| Balance Treehouse Limited | Real estate | 2023 |
| Balboa Holdings Ltd | Professional & scientific | 2014 |
| Balcam Construction Ltd | Construction | 2006 |
| Bali-Hai Properties Ltd | Households | 2012 |
| Balkania (UK) Ltd | Wholesale & retail | 2019 |
| Ballard Contracts Limited | Construction | 2018 |
| Ballinliss Forge Ltd | Manufacturing | 2007 |
| Ballinliss Freight Ltd | Transport & logistics | 2013 |
| Ballinmedda Ltd | Other services | 2024 |
| Ballintemple Contracts Limited | Construction | 2024 |
| Ballintemple FBA Limited | Wholesale & retail | 2024 |
| Ballintemple Holdings Ltd | Financial services | 2022 |
| Ballintur Limited | Agriculture & fishing | 2015 |
| Bally Consultants Limited | Professional & scientific | 2022 |
| Bally Properties Ireland Ltd | Real estate | 2023 |
| Bally Property Services Ltd | Real estate | 2022 |
| Ballyardle Business Park Ltd | Real estate | 2010 |
| Ballyardle Limited | Real estate | 2026 |
| Ballyardle Property Limited | Real estate | 2026 |
| Ballybay Holdings Ltd | Financial services | 2026 |
| Ballyblaugh Farm Ltd | Agriculture & fishing | 2018 |
| Ballybot Community Projects | Professional & scientific | 2015 |
| Ballybot Dental Surgery Limited | Health & social care | 2007 |
| Ballybrick Farms Ltd | Agriculture & fishing | 2015 |
| Ballybridge Bricklaying Ltd | Construction | 2019 |
| Ballycashone Properties Ltd | Real estate | 2026 |
| Ballycomog Farms Limited | Agriculture & fishing | 2022 |
| Ballycutler Limited | Professional & scientific | 2010 |
| Ballycutler Property Limited | Real estate | 2013 |
| Ballydogherty Eggs Ltd | Agriculture & fishing | 2023 |
| Ballydown Meadows Apartment Limited | Households | 2025 |
| Ballydulaney (J&S) Limited | Construction | 2016 |
| Ballydullaney LLP | | 2007 |
| Ballyfraze Feeds Limited | Manufacturing | 2025 |
| Ballygorman School House Association | Other services | 2012 |
| Ballygrange Contracts Limited | Construction | 2018 |
| Ballyholland Community Association | Extraterritorial | 1997 |
| Ballyholland Development Association | Arts & recreation | 2013 |
| Ballyholland Fabrications Limited | Manufacturing | 2017 |
| Ballyholland Harps Ltd | Arts & recreation | 2024 |
| Ballyholland Poultry & Agricultural Supplies Ltd | Wholesale & retail | 2024 |
| Ballykeel Plant Services Limited | Wholesale & retail | 2019 |
| Ballylesson Management Limited | Households | 2018 |
| Ballylesson Trading Limited | Administrative & support | 2017 |
| Ballymac Limited | Hospitality | 2005 |
| Ballymartin Hill Properties Ltd | Real estate | 2025 |
| Ballymartin Inn Limited | Hospitality | 1984 |
| Ballymoyer Equine Ltd | Agriculture & fishing | 2013 |
| Ballynanny Ltd | Real estate | 2013 |
| Ballysessy Close Apartments Management Company Ltd | Households | 2018 |
| Ballyvea Football Club Limited | Arts & recreation | 2019 |
| Ballyward Estates Ltd | Construction | 2006 |
| Ballywillin Limited | Professional & scientific | 2012 |
| Balmoral Manor Management Limited | Households | 2021 |
| Baltford Trade L.P. | | 2017 |
| Baltic Avenue Management Company Limited | Households | 2007 |
| Balto Products L.P. | | 2015 |
| Bambino Sparkle Limited | Wholesale & retail | 2025 |
| Bandar Limited | Construction | 2016 |
| Bann Spinners Management Limited | Households | 2001 |
| Bann View Eggs Limited | Wholesale & retail | 2026 |
| Bannerville Developments Ltd | Construction | 2013 |
| Bannerville Developments NO.2 Limited | Construction | 2024 |
| Bantu Markets Ltd | Wholesale & retail | 2025 |
| Banvale Properties Ltd | Real estate | 2015 |
| Bara Property Limited | Real estate | 2013 |
| Barcor Contracts Ltd | Construction | 2021 |
| Bardon Leisure Ayrshire Limited | Arts & recreation | 2015 |
| Bardon Leisure Dumfries Limited | Arts & recreation | 2015 |
| Bardon Leisure Edinburgh Limited | Arts & recreation | 2015 |
| Bardon Leisure Glasgow Limited | Arts & recreation | 2015 |
| Bardon Leisure Holdings Limited | Arts & recreation | 2015 |