| Beannchor Properties LLP | | 2005 |
| Beannchor Solutions Limited | Hospitality | 2010 |
| Beanos Street Food Ltd | Hospitality | 2020 |
| Beans Peak Limited | Wholesale & retail | 2023 |
| Beansway Co Ltd | Hospitality | 2025 |
| Bearglass Limited | Wholesale & retail | 2025 |
| Bearing Analytics Ltd | Professional & scientific | 2025 |
| Bearna Bhaoil Ltd | Information & communication | 2026 |
| Bears Brothers Ltd | Information & communication | 2025 |
| Beasts of WAR Limited | Information & communication | 2008 |
| Beastys Clothing Ltd | Wholesale & retail | 2025 |
| Beata Kaufmann Ltd | Wholesale & retail | 2024 |
| Beattie Flanigan (Holdings) Limited | Professional & scientific | 2015 |
| Beattie Holdings Ltd | Extraterritorial | 2024 |
| Beattie Property Developments Limited | Real estate | 2007 |
| Beattie Property Services Limited | Agriculture & fishing | 2020 |
| Beatties Chip Shop Limited | Hospitality | 2020 |
| Beatties Distribution Services Ltd | Transport & logistics | 1999 |
| Beatties Pallet Distribution Limited | Transport & logistics | 2024 |
| Beau Activewear Ltd | Wholesale & retail | 2026 |
| Beau Diddly Investments Ltd | Households | 2024 |
| Beaufort Green Management Company Limited | Households | 2024 |
| Beaumont DE LA Roche Ltd | Real estate | 2025 |
| Beaumont Inns Limited | Hospitality | 2011 |
| Beautiful Giftware Limited | Wholesale & retail | 2024 |
| Beautiful Jade Trade Ltd | Wholesale & retail | 2024 |
| Beauty Born Ltd | Wholesale & retail | 2022 |
| Beauty by MO Ltd | Other services | 2026 |
| Beauty Culture (NI) Limited | Other services | 2014 |
| Beauty Expo Limited | Manufacturing | 2023 |
| Beauty Safety Co (RP) Ltd | Extraterritorial | 2026 |
| Becketts Bar Ltd | Hospitality | 2022 |
| Beckford Ventures UK Limited | Professional & scientific | 2024 |
| Beckyiii Ltd | Information & communication | 2024 |
| Bedford ANR Ltd | Hospitality | 2022 |
| Bedford Barber Lounge Ltd | Other services | 2019 |
| Bedford Coffee Bar Ltd | Hospitality | 2015 |
| Bedford Consultancy Services Limited | Professional & scientific | 2008 |
| Bedford Street Developments Limited | Real estate | 2000 |
| Bedford Street Management Company Limited | Real estate | 2007 |
| Bedford Street Property Limited | Financial services | 2021 |
| Bedford Taverns Ltd | Hospitality | 2017 |
| Bedford Way Limited | Real estate | 2022 |
| Bednbath Textile Limited | Manufacturing | 2024 |
| Bedside House Ltd | Hospitality | 2021 |
| BEE Uniformed Limited | Manufacturing | 2024 |
| Beech Hill Consultancy Ltd | Professional & scientific | 2019 |
| Beech House Management Company (NI) Limited | Extraterritorial | 2006 |
| BEECHCROFT4 Limited | Financial services | 2022 |
| Beechdale Properties Management Limited | Real estate | 2007 |
| Beechfield Group Ltd | Real estate | 2024 |
| Beechfield Insulation Ltd | Construction | 2025 |
| Beechill 2017 Limited | Real estate | 2017 |
| Beechill Clinic Ltd | Health & social care | 2023 |
| Beechill Enterprises Limited | Wholesale & retail | 1995 |
| Beechill Grove Ltd | Households | 2012 |
| Beechill Landscapes Limited | Administrative & support | 2004 |
| Beechill Management Apartments Ltd | Households | 2025 |
| Beechill Management Limited | Hospitality | 1989 |
| Beechill Park Management Company Limited | Households | 2015 |
| Beechlands Enterprises Ltd | Construction | 2021 |
| Beechlands Property Limited | Administrative & support | 2012 |
| Beechlawn Motors Ltd | Wholesale & retail | 1987 |
| Beechlea Developments Limited | Real estate | 2007 |
| Beechmount Consultancy Ltd | Transport & logistics | 2026 |
| Beechmount Developments Company Limited | Real estate | 2004 |
| Beechview 102 Ltd | Real estate | 2024 |
| Beechview Developments Limited | Construction | 1999 |
| Beechweld Ltd | Wholesale & retail | 2025 |
| Beechwood Chase Limited | Households | 1990 |
| Beechwood GP Practice C.I.C. | Administrative & support | 2021 |
| Beechwood Lisnaskea Properties Ltd | Households | 2019 |
| Beechwood Management Fermanagh Limited | Households | 2008 |
| Beefree Holdings Limited | Financial services | 2024 |
| Beele Trade Limited | Wholesale & retail | 2025 |
| Beenieman Media Limited | Professional & scientific | 2025 |
| Bees Knees Day Care Nursery Ltd | Other services | 2002 |
| Beespace Technologies Ltd | Information & communication | 2017 |
| Beetlings and Flaxfield Management Company Limited | Households | 2025 |
| Beetuff Limited | Other services | 2026 |
| Befab Limited | Manufacturing | 1989 |
| Befruitful Ltd | Professional & scientific | 2024 |
| Begench Jumaniyazov Limited | Wholesale & retail | 2024 |
| Begench Muhammedov Limited | Wholesale & retail | 2024 |
| Begerry Ltd | Wholesale & retail | 2025 |
| Beggs & Partners (Ballymena) | Wholesale & retail | 1975 |
| Beggs & Partners Trading Ltd | Wholesale & retail | 2023 |
| Beggs (Ballymena) Ltd | Wholesale & retail | 1998 |
| Behot Weline Limited | Wholesale & retail | 2025 |
| Behunisla Ltd | Wholesale & retail | 2024 |
| Beijing Yongli Garden Ltd | Hospitality | 2021 |
| Being Baby Limited | Wholesale & retail | 2018 |
| Being Communications Limited | Information & communication | 2000 |
| BEL (NI) Limited | Manufacturing | 2011 |
| Belbirn Ltd | Wholesale & retail | 2020 |
| Belbridge Capital Limited | Professional & scientific | 2025 |
| Beldon Properties Limited | Real estate | 1976 |
| Belerne Ltd | Hospitality | 2022 |
| Belfast & Down OIL Supplies Limited | Wholesale & retail | 2013 |
| Belfast Academy Ltd | Information & communication | 2016 |