| Bay Tree Interiors Limited | Construction | 2000 |
| Bayezian Limited | Information & communication | 2020 |
| Bayles and Wylie Limited | Real estate | 1929 |
| Bayside Advisory Ltd | Professional & scientific | 2026 |
| Baysurf Limited | Financial services | 1997 |
| Bayswell Investments Limited | Real estate | 2013 |
| Bazline Ltd | Administrative & support | 2025 |
| Bazmi Medical Services Ltd | Health & social care | 2023 |
| Bazu Magazin Ltd | Wholesale & retail | 2022 |
| Bazzas Properties Limited | Hospitality | 2019 |
| Bazzaz Consultancy Limited | Professional & scientific | 2015 |
| BB 2026 Limited | Professional & scientific | 2026 |
| BB Barred Pubs Limited | Hospitality | 2022 |
| BB Collective Ltd | Other services | 2021 |
| BB Elements 105 Ltd | Real estate | 2024 |
| BB Elements Ltd | Real estate | 2018 |
| BB Jewelleryco Ltd | Other services | 2025 |
| BB Kettles Ltd | Wholesale & retail | 2022 |
| BB Nottingham Lettings Ltd | Real estate | 2019 |
| BB Optimization Ltd | Information & communication | 2017 |
| BBA Enterprises Ltd | Administrative & support | 1996 |
| BBA Trent Limited | Financial services | 2009 |
| Bbae Investments Ltd | Real estate | 2020 |
| BBB88 Ltd | Real estate | 2020 |
| BBD International Limited | Education | 2014 |
| Bbeye Limited | Wholesale & retail | 2003 |
| BBI Transport Ltd | Other services | 2018 |
| Bbit Ltd | Information & communication | 2018 |
| BBM Healthcare Recruitment and Cleaning Services Ltd | Administrative & support | 2019 |
| BBM Nottingham Ltd | Wholesale & retail | 2026 |
| Bbnfn Private Company Limited | Health & social care | 2018 |
| BBS Decorating Limited | Construction | 2014 |
| Bbtn Studio Limited | Other services | 2026 |
| BC Consultant Limited | Professional & scientific | 2024 |
| BC Surfacing and Groundswork Ltd | Construction | 2021 |
| BCA Bulwell Central Autos Ltd | Wholesale & retail | 2026 |
| BCA Fabrics Limited | Manufacturing | 2018 |
| BCB3 Transport Ltd | Transport & logistics | 2021 |
| BCC Race Team Limited | Arts & recreation | 2025 |
| Bccw Holdings Limited | Financial services | 2024 |
| BCD Drinks Limited | Hospitality | 2025 |
| BCD Medical International Limited | Health & social care | 2010 |
| BCF Group Limited | Administrative & support | 2017 |
| BCF Property Solutions Limited | Real estate | 2021 |
| BCM Employment & Management Services Limited | Administrative & support | 2009 |
| BCM Limited | Manufacturing | 1992 |
| BCS 1 Limited | Wholesale & retail | 2026 |
| BCS Healthcare Limited | Health & social care | 2015 |
| BCS Quality Contracts Limited | Administrative & support | 2015 |
| BD GAS Permits Ltd | Energy | 2020 |
| BD Permits Ltd | Energy | 2020 |
| BD Signs Limited | Manufacturing | 2015 |
| BD3 CW Limited | Hospitality | 2022 |
| BD3T Limited | Professional & scientific | 2011 |
| BD7 CW Limited | Hospitality | 2022 |
| BDA Ltd | Manufacturing | 2026 |
| BDB Studios Ltd | Information & communication | 2013 |
| Bdcomposites Limited | Manufacturing | 2015 |
| Bddnyc Limited | Real estate | 2021 |
| Bden Glass Ltd | Manufacturing | 2016 |
| BDF Partnership LLP | | 2012 |
| BDF Plant Limited | Administrative & support | 2006 |
| Bdla Accessories Limited | Wholesale & retail | 2009 |
| BDN Consultancy Ltd | Professional & scientific | 2015 |
| BDN Property Management Ltd | Real estate | 2019 |
| BDP Maintenance Ltd | Administrative & support | 2025 |
| BDP Practice Ltd | Health & social care | 2015 |
| BDP Property Ltd | Real estate | 2022 |
| Bdrkventures Limited | Households | 2025 |
| BDS Active Recovery Ltd | Health & social care | 2025 |
| BDS Holdings Limited | Hospitality | 2017 |
| BDS Marketing Research (QMJ) Limited | Professional & scientific | 2016 |
| Bdsr & Sons Ltd | Hospitality | 2022 |
| BE Better Solutions Ltd | Professional & scientific | 2023 |
| BE Cared for Limited | Other services | 2011 |
| BE Couture (Aesthetics) Ltd | Health & social care | 2019 |
| BE Crowned Studios Ltd | Other services | 2026 |
| BE Foxy Media Ltd | Professional & scientific | 2021 |
| BE Human Collective Ltd | Professional & scientific | 2024 |
| BE Kind Health Care Limited | Administrative & support | 2021 |
| BE Music Limited | Extraterritorial | 2012 |
| BE Nice Care Ltd | Administrative & support | 2022 |
| Be-Bella Cosmetics Ltd | Other services | 2021 |
| Be-Youtiful Aesthetics Limited | Health & social care | 2018 |
| Be...Creative Therapies Ltd | Health & social care | 2015 |
| BEA Cleaning Services Ltd | Administrative & support | 2015 |
| Beach Court Ventnor (Management) Limited | Households | 2025 |
| Beach Haven Leisure Limited | Hospitality | 2018 |
| Beach Haven Park Management Ltd | Hospitality | 2024 |
| Beacon Associates Topco Ltd | Professional & scientific | 2021 |
| Beacon Associates UK Ltd | Financial services | 2005 |
| Beacon Bingo Entertainment Limited | Arts & recreation | 2024 |
| Beacon Property & Stays Ltd | Administrative & support | 2026 |
| Beacon Trading and Solutions Ltd | Other services | 2022 |
| Beager Group Limited | Administrative & support | 2025 |
| Beagle Plumbing Limited | Construction | 2025 |
| Beagle Psychiatric Consultancy Limited | Health & social care | 2015 |
| Beale Property Investments Limited | Real estate | 2016 |
| Beale Residential Limited | Real estate | 2021 |
| Beales Holdings Ltd | Manufacturing | 2022 |