| Bangor Spice Ltd | Hospitality | 2019 |
| Bani Ventures Ltd | Wholesale & retail | 2025 |
| Baniyaa Consulting Limited | Health & social care | 2022 |
| Bank Top Brewery Limited | Manufacturing | 2004 |
| Banton Dare Investments Limited | Financial services | 2025 |
| Banton Investments Ltd | Construction | 2019 |
| Banyan Tree Property Ltd | Real estate | 2023 |
| Bar Marketing Limited | Administrative & support | 2011 |
| Bar Sage Ltd | Hospitality | 2023 |
| Bar Stocks Limited | Hospitality | 2012 |
| Bara-Mix Limited | Wholesale & retail | 2004 |
| Bara-Mix Plant & Equipment Limited | Administrative & support | 2011 |
| Barahart Gold Ltd | Wholesale & retail | 2019 |
| Barakah Energy Ltd | Energy | 2026 |
| Barakah Growth Holdings Ltd | Real estate | 2025 |
| Barakah Hospitality Group Ltd | Hospitality | 2025 |
| Barakahbase Ltd | Wholesale & retail | 2016 |
| Barakat Store Ltd | Wholesale & retail | 2023 |
| Baraqo Solutions Ltd | Information & communication | 2026 |
| Baraxly Ltd | Professional & scientific | 2024 |
| Barbara Street MOT Centre Limited | Wholesale & retail | 2017 |
| Barbared Limited | Information & communication | 2018 |
| Barbersonmilane Ltd | Other services | 2025 |
| Barbour & Co Property Limited | Financial services | 2025 |
| Barca Manchester Ltd | Wholesale & retail | 2019 |
| Barcelona 786 Ltd | Transport & logistics | 2022 |
| Barclay & Hurst Limited | Real estate | 2018 |
| Barclay Advisory Services Ltd | Professional & scientific | 2024 |
| Bardsley Electrical Ltd | Construction | 2019 |
| Bare Connection Limited | Wholesale & retail | 2025 |
| Bare Knuckle News UK Limited | Information & communication | 2025 |
| Bare Teeth (Morecambe) Ltd | Health & social care | 2023 |
| Barfee Food Limited | Hospitality | 2025 |
| Barfia Bolton Limited | Wholesale & retail | 2020 |
| Bargain Masters (Bolton) Ltd | Wholesale & retail | 2012 |
| Bargain World Hunt Cross Ltd | Wholesale & retail | 2024 |
| Bargain Zone 4U Ltd | Wholesale & retail | 2015 |
| Bargains Hunt Ltd | Wholesale & retail | 2024 |
| Bark Bolton Ltd | Other services | 2022 |
| Bark Design Studios Ltd | Professional & scientific | 2020 |
| Bark Street Digital Limited | Professional & scientific | 2018 |
| Barkat Foodstore Bolton Ltd | Wholesale & retail | 2012 |
| Barkat Grill Ltd | Hospitality | 2023 |
| Barkat Motors Ltd | Wholesale & retail | 2023 |
| Barkat Property Investment Ltd | Real estate | 2017 |
| Barker & Pattichis Limited | Manufacturing | 2013 |
| Barker Estates (Cumbria) Ltd | Hospitality | 2021 |
| Barker Telecommunications Limited | Information & communication | 1998 |
| Barkerrsc Ltd | Hospitality | 2023 |
| Barking Bamforths Doggy Barbers Limited | Professional & scientific | 2017 |
| Barklys Ltd | Other services | 2024 |
| Barlach Limited | Information & communication | 2018 |
| Barley Green Mill Management Company Limited | Households | 2017 |
| Barlow Holdings Ltd | Financial services | 2023 |
| Barlowen Developments Ltd | Real estate | 2020 |
| Barlows Direct Ltd | Hospitality | 2018 |
| Barnabas House Ltd | Education | 2001 |
| Barncote Investments Limited | Professional & scientific | 2005 |
| Barndata Ltd | Information & communication | 2006 |
| Barnesfield Investments Ltd | Financial services | 2026 |
| Barney Properties Limited | Real estate | 2019 |
| Barns Lane Holdings Limited | Construction | 2020 |
| Barolo Bar and Restaurant Limited | Hospitality | 2020 |
| Baron Jacob VON Ratzeburg Limited | Arts & recreation | 2025 |
| Barraclough Design Limited | Professional & scientific | 1989 |
| Barratt & Hughes Flooring Specialists Limited | Construction | 2006 |
| Barrell Holdings Limited | Financial services | 2021 |
| Barrett Enterprises Global Limited | Information & communication | 2012 |
| Barricade Security Limited | Professional & scientific | 2013 |
| Barrington Stroud Ltd | Construction | 2008 |
| Barrowdene Management Company Limited | Households | 1992 |
| Barry Arthur Holmes Ltd | Professional & scientific | 2024 |
| Barry Chapman Motion Limited | Professional & scientific | 2026 |
| Barry's Recovery Services Limited | Transport & logistics | 2022 |
| Barsco Films Ltd | Information & communication | 2022 |
| Barton Drilling Limited | Construction | 1982 |
| Barzakh Muslim Funerals Limited | Other services | 2012 |
| Base Academy Trust | Education | 2016 |
| Base X Ltd | Administrative & support | 2023 |
| Baseer Limited | Health & social care | 2022 |
| Basement 74 Limited | Hospitality | 2020 |
| Basement and Drainage Systems Limited | Wholesale & retail | 2009 |
| Bash Bolton Limited | Wholesale & retail | 2018 |
| Bash Builders Ltd | Construction | 2024 |
| Bash Properties Bolton Limited | Real estate | 2020 |
| Basirat OMO Healthcare Ltd | Health & social care | 2020 |
| Basit Blends Limited | Other services | 2026 |
| Bask in Beauty Ltd | Other services | 2026 |
| Batch Ventures LLP | | 2020 |
| Batemans Decorators Limited | Construction | 2005 |
| Bath and Bedding Limited | Wholesale & retail | 2013 |
| Bath Tails Grooming Ltd | Other services | 2023 |
| Bathroom IQ Ltd | Wholesale & retail | 2011 |
| Bathroom Solved Limited | Construction | 2018 |
| Bathroom Supplies Ltd | Manufacturing | 2026 |
| Battery Capital Solutions Ltd | Professional & scientific | 2026 |
| Battleforge Games Ltd | Wholesale & retail | 2025 |
| Baudeen Healthcare Ltd | Wholesale & retail | 2023 |
| Bauer Media Outdoor Technic Holdings Limited | Professional & scientific | 2008 |
| Bauer Media Outdoor Technic Limited | Professional & scientific | 1992 |