| Ayad Food Limited | Hospitality | 2024 |
| Azelis UK Finance Limited | Administrative & support | 2018 |
| Azelis UK Holdings Limited | Financial services | 2002 |
| Azelis UK Limited | Wholesale & retail | 1998 |
| B & D Building Maintenance Limited | Construction | 2009 |
| B Construction Group Ltd | Construction | 2015 |
| B Inked 2 Ltd | Other services | 2019 |
| B&D Elite Properties Limited | Real estate | 2025 |
| B.S.D.A. Ltd | Professional & scientific | 2014 |
| B2B Connect IT Ltd | Information & communication | 2020 |
| B2B IT Ltd | Information & communication | 2008 |
| Babis Trans Limited | Transport & logistics | 2016 |
| Babs Beauty & Aesthetics Ltd | Other services | 2023 |
| BAC Group Holdings Limited | Financial services | 2025 |
| Badger Day Care Ltd. | Education | 2012 |
| Badger Plumbing & Heating Ltd | Construction | 2024 |
| Baltic Brokers Ltd | Professional & scientific | 2010 |
| Bamboo Bear Nursery Group Ltd | Education | 2018 |
| Banner Chemicals Limited | Professional & scientific | 1902 |
| Bannister Fletcher Limited | Wholesale & retail | 2020 |
| Baranda Services Ltd | Information & communication | 2023 |
| Barber Green Digital Community Interest Company | Information & communication | 2018 |
| Barely MOW Limited | Administrative & support | 2023 |
| BARRIER2U Ltd | Administrative & support | 2014 |
| Barton Moss Equestrian Limited | Arts & recreation | 2014 |
| Bartrekker Ltd | Administrative & support | 2024 |
| Baseline Burgers Ltd | Hospitality | 2023 |
| Basnett Limited | Construction | 2009 |
| Baudet Modular Solutions UK Ltd | Construction | 2022 |
| BB HGV Ltd | Transport & logistics | 2025 |
| Bbtechbytes Ltd | Wholesale & retail | 2023 |
| BC Cranes 24/7 Ltd | Construction | 2015 |
| Bcaduk Ltd | Wholesale & retail | 2026 |
| BCP Painting Ltd | Construction | 2022 |
| BDS General Services Ltd | Transport & logistics | 2015 |
| BE Inspired HR Consultancy Limited | Administrative & support | 2024 |
| Bears Holdings Ltd | Wholesale & retail | 2022 |
| Beaumont Direct Ltd | Wholesale & retail | 2026 |
| Beautopiaz Limited | Other services | 2011 |
| Beautybyj Ltd | Other services | 2025 |
| BEE Secure (NW) Limited | Administrative & support | 2013 |
| Beechwood Community Centre (Halton) C.I.C. | Households | 1971 |
| Beechwood Nursery & Pre-School Ltd | Education | 2023 |
| Beer Republic Ltd | Hospitality | 2016 |
| Bell R Limited | Manufacturing | 1999 |
| Bellwether Management Ltd | Professional & scientific | 2023 |
| BEN Coker Strategies Limited | Professional & scientific | 2026 |
| BEN R Logistics Limited | Transport & logistics | 2019 |
| BEN Spanton Golf Ltd | Wholesale & retail | 2026 |
| BEN Walker Creative Limited | Professional & scientific | 2010 |
| Bentons Custom Designs Ltd | Wholesale & retail | 2022 |
| Berrish.Co Ltd | Hospitality | 2025 |
| Besecure IT Limited | Information & communication | 2018 |
| Beten (UK) Ltd | Wholesale & retail | 2018 |
| Betta Snax Ltd | Wholesale & retail | 2025 |
| Betty Brown Boutique Ltd | Manufacturing | 2021 |
| Bevris Limited | Hospitality | 2011 |
| Beyond the Wander Ltd | Administrative & support | 2019 |
| Big Fish Group Holdings Limited | Other services | 2022 |
| Big Fish Group Limited | Other services | 2019 |
| Big Green Consultancy Ltd | Administrative & support | 2013 |
| Bioscientifix Limited | Professional & scientific | 2021 |
| Birchdale Property Holdings Limited | Real estate | 2013 |
| BIS Salamis Limited | Wholesale & retail | 1983 |
| Bits N Bits Ltd | Wholesale & retail | 2026 |
| Blackfive Engineering Group Ltd | Manufacturing | 1987 |
| Blackfive Engineering Limited | Manufacturing | 2000 |
| Blackfive Valves Limited | Manufacturing | 2000 |
| Bling Glamour Models Ltd | Arts & recreation | 2024 |
| Bloxam Turbine Services Ltd | Construction | 2025 |
| Blue Arrow Traffic Management (Holdings) Limited | Financial services | 2015 |
| Blue Arrow Traffic Management Limited | Construction | 1984 |
| Blue Spedition Ltd | Transport & logistics | 2020 |
| Blueball Brewery Ltd | Manufacturing | 2011 |
| Bluegate Management Limited | Information & communication | 2016 |
| Bluequest Solutions Ltd | Wholesale & retail | 2023 |
| Blyth Valley Toilets Limited | Manufacturing | 2012 |
| Blyth Vehicle Services Ltd | Wholesale & retail | 2025 |
| Bneoutfitz Ltd | Wholesale & retail | 2025 |
| Boards for Education | Education | 1999 |
| Bocian PL Ltd | Wholesale & retail | 2025 |
| Bombers E Bikes Ltd | Education | 2021 |
| Bones U Like Pet Supplies Ltd | Wholesale & retail | 2014 |
| Booths Support Services Ltd. | Construction | 2015 |
| BOOZE2YOU Runcorn Limited | Wholesale & retail | 2020 |
| Bored Investments (BIL) LLP | | 2005 |
| Bosstm Ltd | Transport & logistics | 2024 |
| Bradford Swissport Limited | Transport & logistics | 2012 |
| Brakes and Tyres on Your Drive Ltd | Wholesale & retail | 2024 |
| Brantham Limited | Administrative & support | 2019 |
| Braodfields Ltd | Real estate | 2025 |
| BREEZE89 Limited | Real estate | 2021 |
| Brenclare Ltd | Other services | 2016 |
| Bridge Deli Limited | Hospitality | 2016 |
| Bridge Maintenance Ltd | Other services | 2021 |
| Bridge Vehicles Ltd | Financial services | 2024 |
| Bridgelink Group Limited | Financial services | 2026 |
| Bridgemere Charterhall Limited | Construction | 2020 |
| Briggs Applied Technology Limited | Professional & scientific | 2022 |
| Briggs Automotive Company (BAC) Limited | Manufacturing | 2009 |