| Birchley Consultants Limited | Health & social care | 2013 |
| Birkdale Drains Limited | Water & waste | 2026 |
| Birkett Motors Ltd | Wholesale & retail | 2016 |
| Bishop Pike Holdings Limited | Real estate | 2024 |
| Bishop Pike Properties Limited | Households | 2024 |
| Bissa Commercial Furniture Ltd | Wholesale & retail | 2025 |
| Biteboxes Ltd | Hospitality | 2026 |
| Bj's Travel Limited | Transport & logistics | 2026 |
| BKW Healthcare Ltd | Wholesale & retail | 2020 |
| Black & Melling Ltd | Hospitality | 2024 |
| Black Anvil Customs Ltd | Manufacturing | 2026 |
| Black Sheep Coaching Ltd | Wholesale & retail | 2025 |
| Blacksmith Brothers Ltd | Wholesale & retail | 2023 |
| Blade MD Limited | Construction | 2022 |
| Blank Canvas by MD CIC | Arts & recreation | 2019 |
| Blind Panda Ltd | Information & communication | 2026 |
| Blissfulescapes Limited | Administrative & support | 2022 |
| Bloom and Bling Occasions Ltd | Hospitality | 2022 |
| Bloomfield Road Healthcare Limited | Wholesale & retail | 2024 |
| Blossom Tree PRE School Limited | Education | 2021 |
| Blossoms Deli Haydock Ltd | Hospitality | 2025 |
| Blubook Technologies Limited | Information & communication | 2026 |
| Blue Clover Property SPV Limited | Real estate | 2025 |
| Blue Sky Polymers Ltd | Other services | 2021 |
| Blue-Chip Real Estate Ltd. | Real estate | 2017 |
| Bluecalx Limited | Professional & scientific | 2016 |
| Blueprint Construction Consulting Ltd | Professional & scientific | 2026 |
| Bluestem Services Limited | Professional & scientific | 2024 |
| Bluvera Global Ltd | Wholesale & retail | 2025 |
| BNR Autocare Ltd | Professional & scientific | 2025 |
| Bogo Property Ltd | Real estate | 2024 |
| Boland Consultants Limited | Administrative & support | 2025 |
| Bolas Integrated Project UK Limited | Professional & scientific | 2025 |
| Bold Bhaile C.I.C. | Health & social care | 2024 |
| Bold Display Ltd | Manufacturing | 2023 |
| Bold Logistics Limited | Transport & logistics | 2015 |
| Bold Project Solutions Ltd | Construction | 2024 |
| Bold Property Developments Ltd | Construction | 2025 |
| Bold Veterinary Clinic Limited | Professional & scientific | 2013 |
| Bolton Logistics Ltd | Transport & logistics | 2010 |
| Bongfah Ltd | Health & social care | 2024 |
| Booboo IT Services Ltd | Information & communication | 2023 |
| Bootle Peri Peri & Pizza Ltd | Hospitality | 2023 |
| Boss Films Limited | Information & communication | 2020 |
| Boundary Management Company (ST Helens ) Limited | Households | 2005 |
| Boxcon Ltd | Transport & logistics | 2023 |
| Boxxy Ltd | Construction | 2025 |
| Boylan Holidays Ltd | Administrative & support | 2025 |
| BP Deliveries Ltd | Transport & logistics | 2026 |
| BPD Berry Property Developments Ltd | Construction | 2021 |
| BPH 91 Ltd | Other services | 2021 |
| Brackens Market Butchers Limited | Wholesale & retail | 2016 |
| Brasenose Commercial Limited | Real estate | 2022 |
| Brasenose Residential Limited | Real estate | 2014 |
| Bravo TD Limited | Wholesale & retail | 2025 |
| Brazuka Transport Ltd | Transport & logistics | 2025 |
| Breathe.Learn.Live Ltd | Education | 2025 |
| Brewed UP Research Products & Services Ltd | Professional & scientific | 2018 |
| Bridgend Property Services Ltd | Real estate | 2024 |
| Bright KOM Properties Limited | Real estate | 2022 |
| Brightholme Care Services Limited | Health & social care | 2007 |
| Brimel Property Development Ltd | Real estate | 2025 |
| Britpak Limited | Hospitality | 2023 |
| Broadheath Healthcare Limited | Wholesale & retail | 2012 |
| Broadway Pharma Limited | Wholesale & retail | 2025 |
| Bromak Ltd | Wholesale & retail | 2025 |
| Bromborough Healthcare Limited | Wholesale & retail | 2024 |
| Bronoble Ltd | Information & communication | 2026 |
| Brooks HR Limited | Extraterritorial | 2024 |
| Brookside Court RTM Company Ltd | Households | 2023 |
| Brookson (5149E) Limited | Administrative & support | 2007 |
| Brookway Contractors Limited | Construction | 2025 |
| Brothers Vape Store Ltd | Wholesale & retail | 2022 |
| Brown Edge House Limited | Health & social care | 2013 |
| Browns Short Break Respite Limited | Health & social care | 2010 |
| Brown’S Cyber Consultancy Ltd | Information & communication | 2026 |
| BRT Investment Group Limited | Construction | 2025 |
| Bryn Optical Practice Limited | Health & social care | 2002 |
| BSC Coaching Limited | Education | 2021 |
| BTA Home Developments Ltd | Construction | 2020 |
| Btff Ltd | Transport & logistics | 2025 |
| BTH Ventures Ltd | Financial services | 2026 |
| Building & Groundwork Services Ltd. | Construction | 2014 |
| Building Energy Compliance Limited | Administrative & support | 2014 |
| Building Resilient Communities CIC | Education | 2016 |
| Buildswift Limited | Construction | 1995 |
| Bulius Limited | Health & social care | 2014 |
| Bulldog Self Storage Limited | Administrative & support | 2017 |
| Bumblebees Community Nursery Ltd | Education | 2006 |
| Bura Group Ltd | Education | 2018 |
| Burns & Reid Limited | Real estate | 2008 |
| Burrows and FOY LLP | | 2021 |
| Burrows SPV Ltd | Wholesale & retail | 2022 |
| Burton & Co. Property Group Ltd | Construction | 2026 |
| BUS Stop News Limited | Wholesale & retail | 2019 |
| Business and Maintenance LPG Limited | Administrative & support | 2018 |
| Business for Zero Carbon Ltd | Administrative & support | 2023 |
| Business Retention Solutions Ltd | Public administration | 2025 |
| Butterfield Home Care Limited | Health & social care | 2023 |
| Buttermere Property Services Ltd | Real estate | 2020 |