| BM Anghel Solutions Ltd | Administrative & support | 2025 |
| BM Holdings Preston Limited | Wholesale & retail | 2000 |
| BM Joinery Limited | Construction | 2016 |
| BM Recycling Limited | Wholesale & retail | 2018 |
| BMA Music Limited | Administrative & support | 2002 |
| BMG Consulting Services Limited | Professional & scientific | 2024 |
| BMG Motors Ltd | Wholesale & retail | 2022 |
| BMI Plumbing and Heating Ltd. | Construction | 2003 |
| BMM Construction Management Ltd | Construction | 2018 |
| BMM Link Services Limited | Health & social care | 2014 |
| BMN Care Limited | Real estate | 2017 |
| BMN Commercial Limited | Administrative & support | 2016 |
| BNB Advisors Ltd | Professional & scientific | 2020 |
| Boadicea Park Ltd | Hospitality | 2022 |
| Boars Head Barton Management Company Limited | Households | 2022 |
| BOB & BEE Ltd | Wholesale & retail | 2023 |
| BOB Hodkinson Limited | Wholesale & retail | 2019 |
| BOB Woodcock Software Limited | Information & communication | 2011 |
| Bob's Boatyard Limited | Transport & logistics | 2018 |
| Boba Limited | Transport & logistics | 2015 |
| Bobbin Mill Shooting Ground Ltd. | Arts & recreation | 2018 |
| Bobble Consultancy Limited | Professional & scientific | 2020 |
| Bobburi & Co. Ltd | Wholesale & retail | 2025 |
| Bobby's Restaurant Limited | Hospitality | 2012 |
| Bobs Wholesale Ltd | Wholesale & retail | 2019 |
| Boda Interiors Limited | Wholesale & retail | 2025 |
| Bode Engineering Limited | Extraterritorial | 1991 |
| Bode Positioners Limited | Manufacturing | 1991 |
| Bodgit and Scarper Enterprises Limited | Wholesale & retail | 1991 |
| Bodhi Brew Limited | Hospitality | 2025 |
| Body Blast Project Ltd | Other services | 2020 |
| Body Dryer Ltd | Wholesale & retail | 2023 |
| Body Revive Aesthetics Ltd | Other services | 2021 |
| Bodyfix Smart Repairs Ltd | Wholesale & retail | 2026 |
| BOE Investments Limited | Real estate | 2026 |
| Boho Connections Ltd | Wholesale & retail | 2025 |
| Boiled Frog Limited | Professional & scientific | 2015 |
| Boiler Brain Ltd | Information & communication | 2025 |
| Bokhari Pharma Ltd | Wholesale & retail | 2025 |
| Bold and Beauty (UK) Ltd | Wholesale & retail | 2020 |
| Bolemead Holdings Limited | Professional & scientific | 2024 |
| Boltnn Ltd | Transport & logistics | 2019 |
| Bolton Developments Limited | Construction | 2024 |
| Bolton Electrical Engineering Ltd | Professional & scientific | 2013 |
| Bolton FF Ltd | Hospitality | 2019 |
| Bolton Fundco 1 Limited | Real estate | 2009 |
| Bolton Halal Meat Market Limited | Wholesale & retail | 2012 |
| Bolton Holdco Limited | Financial services | 2009 |
| Bolton Poultry NW Ltd | Wholesale & retail | 2020 |
| Bolton R&B Ltd | Wholesale & retail | 2026 |
| Bolton Radiology LLP | | 2025 |
| Bolton Security Limited | Administrative & support | 2013 |
| Bolton's Wood Investments Limited | Real estate | 2007 |
| Boltonhr Limited | Administrative & support | 2025 |
| Boltz Electrical Services Ltd | Construction | 2020 |
| Bonbons Coffee Bar Ltd. | Hospitality | 2016 |
| Bonculescu D Ltd | Transport & logistics | 2025 |
| Bond Bespoke Staircases Ltd | Manufacturing | 2019 |
| BOND7 Developments Limited | Construction | 2024 |
| Bondon International Limited | Manufacturing | 2019 |
| Bonds of Longridge Projects Limited | Financial services | 2019 |
| Bone Construction Ltd | Construction | 2007 |
| Bones.Dog Ltd | Manufacturing | 2025 |
| Bonita Belle Limited | Wholesale & retail | 2013 |
| Bonnebouche by Mumtaz Ltd | Administrative & support | 2026 |
| Bonnybull Ltd | Administrative & support | 2023 |
| Bonsai Hosting Ltd | Information & communication | 2021 |
| BOO & Hipps Limited | Other services | 2021 |
| BOO Property Management Limited | Real estate | 2008 |
| Boogie Basement Preston Limited | Real estate | 2024 |
| BOOKS4ALL Limited | Wholesale & retail | 2020 |
| Booth's Garage Ltd | Real estate | 2021 |
| Booth's Property Developments Ltd | Real estate | 2021 |
| Boothcs Limited | Construction | 2025 |
| Booths (Lytham) Limited | Real estate | 2010 |
| Booths Riversway Limited | Manufacturing | 1949 |
| Booz Brothers Limited | Wholesale & retail | 2025 |
| Border Doors Limited | Construction | 1991 |
| Borderless Fintech Limited | Information & communication | 2022 |
| Born Survivor Events Limited | Arts & recreation | 2018 |
| Borrowdale Eight Ltd | Financial services | 2016 |
| Borsdane Limited | Agriculture & fishing | 2019 |
| Bosphorus Sofrasi Ltd | Hospitality | 2025 |
| Boss Group GB Limited | Wholesale & retail | 2009 |
| Boss Supplies Ltd | Wholesale & retail | 2022 |
| Bottlecloset Ltd | Wholesale & retail | 2024 |
| Boughen Properties Limited | Real estate | 2019 |
| Boulevard Community Centre Ltd | Other services | 2017 |
| Boulton Brick Property Investors Ltd | Real estate | 2025 |
| Bounceback Netball Limited | Arts & recreation | 2021 |
| Boundary PLM Limited | Information & communication | 2019 |
| Boundary Stone Management Ltd | Real estate | 2019 |
| Boundary Stone Park Developments Ltd | Mining & quarrying | 2019 |
| Boundary Stone Park Holdings Ltd | Administrative & support | 2017 |
| Boundless Publishing Group Ltd | Information & communication | 2025 |
| Bourke Developments Ltd | Construction | 2011 |
| Bourne Brow Construction Ltd. | Construction | 2011 |
| Boutique Greece Ltd | Administrative & support | 2011 |
| BOW Distribution and Warehousing Limited | Transport & logistics | 1998 |
| Bowen Sport Horses Limited | Agriculture & fishing | 2012 |