| Boulevardier Limited | Hospitality | 2020 |
| Boultwins Unlimited | Professional & scientific | 2025 |
| Bounceback Collective: Circular Economy Manufacturing Ltd | Manufacturing | 2026 |
| Bounced Waves Studio Ltd | Information & communication | 2023 |
| Bound Events Limited | Other services | 2024 |
| Boundary Van Rental Ltd | Administrative & support | 2019 |
| Bounty Bodega Ltd | Wholesale & retail | 2023 |
| Bouquet Florists (Sheffield) Limited | Wholesale & retail | 2020 |
| Bournedale Properties Limited | Real estate | 2025 |
| Bournville Estates Limited | Real estate | 2000 |
| Boutique Boatels Limited | Hospitality | 2013 |
| Boutique Hair HQ Ltd | Other services | 2025 |
| Boutique Ltd | Wholesale & retail | 2003 |
| BOW & Lace Ltd | Arts & recreation | 2018 |
| BOW Bridge Cars Ltd | Wholesale & retail | 2016 |
| Bowden Electrical Limited | Construction | 2015 |
| Bowen Construction Management Solutions Limited | Construction | 2021 |
| Bowen Joinery Limited | Construction | 2002 |
| Bowers Group Limited | Professional & scientific | 1976 |
| Bowers Metrology (UK) Limited | Wholesale & retail | 1994 |
| Bowers Metrology Limited | Manufacturing | 1989 |
| Bowers Towers Scaffolding Limited | Construction | 2023 |
| Bowhill Post Limited | Professional & scientific | 2015 |
| Bowler Plastering Contractors Limited | Construction | 2011 |
| Bowller Group Limited | Extraterritorial | 1985 |
| Bowman Automation Ltd | Information & communication | 2011 |
| Bowman Cycles Ltd | Extraterritorial | 2022 |
| Bowman Property Ltd | Real estate | 2016 |
| Bowood Developments Ltd | Construction | 2018 |
| Bowood Estates Lettings Limited | Real estate | 2019 |
| Bowpick Estates Limited | Real estate | 2025 |
| Bowss Limited | Other services | 2017 |
| Box Deluxe Limited | Arts & recreation | 2010 |
| Box Properties Ltd | Real estate | 2024 |
| Box PWR Limited | Wholesale & retail | 2023 |
| BOX3 Ltd | Information & communication | 2024 |
| Boxed OFF Limited | Professional & scientific | 2017 |
| Boxed Origin Limited | Wholesale & retail | 2025 |
| Boxer Building Services Ltd | Construction | 2020 |
| Boxfest Music LLP | | 2019 |
| Boxfill Removals and Storage Limited | Transport & logistics | 2011 |
| Boxing by CB Limited | Arts & recreation | 2025 |
| Boxlab Ltd | Professional & scientific | 2023 |
| Boxnbuy Limited | Wholesale & retail | 2025 |
| Boxwood A.D.R. Ltd | Professional & scientific | 2022 |
| Boyd’S Freight Services Limited | Financial services | 2022 |
| Boyle Accounting & Consultancy Ltd | Professional & scientific | 2023 |
| Boys and Girls Clubs of South Yorkshire | Education | 2011 |
| BP Heating & Cooling Solutions Limited | Other services | 2017 |
| BP Joinery Manufacturing Ltd | Construction | 2023 |
| BP Tree Care Limited | Administrative & support | 2020 |
| BP19 Consulting Ltd | Professional & scientific | 2016 |
| Bprd Therapeutics Limited | Professional & scientific | 2026 |
| BPS Building Contractor Ltd | Construction | 2019 |
| BPS Estates Lettings Limited | Real estate | 2020 |
| BPW Construction Ltd | Construction | 2021 |
| BR Accountancy Ltd | Professional & scientific | 2024 |
| BR Management Limited | Households | 2025 |
| BR8 Plus Limited | Professional & scientific | 2012 |
| Brabox Ltd | Wholesale & retail | 2025 |
| Brad Walls Music Ltd | Arts & recreation | 2024 |
| Bradbourne Investments Ltd | Administrative & support | 2015 |
| Brades Skelton & Tyrack Limited | Extraterritorial | 1997 |
| Bradfield Brewery Limited | Manufacturing | 2009 |
| Bradfield Property Lettings Limited | Real estate | 2017 |
| Bradford Music Limited | Information & communication | 2020 |
| Bradley Mclaren Holdings Limited | Professional & scientific | 2020 |
| Bradley Plumbing Heating and GAS Ltd | Construction | 2025 |
| Bradleys Cleaning Ltd | Administrative & support | 2024 |
| Bradshaw Builders Limited | Construction | 2025 |
| Bradshaw Lets Ltd | Construction | 2021 |
| Bradstreet Developments Ltd | Construction | 2018 |
| Bradway Business Development Limited | Professional & scientific | 2015 |
| Bradway Treasure Limited | Wholesale & retail | 2005 |
| Braehead MEX Limited | Hospitality | 2021 |
| Braemore Management Limited | Households | 2006 |
| Brag Jeans Ltd | Wholesale & retail | 2026 |
| Brag Vintage Limited | Wholesale & retail | 2017 |
| Bragazzis Limited | Wholesale & retail | 2014 |
| Braidzilla Ltd | Other services | 2025 |
| Braille Examination Transcription Service Limited | Education | 2003 |
| Brainstem Ltd | Information & communication | 2024 |
| Brainstorming Limited | Professional & scientific | 2004 |
| BRAINTRAIN2020 Limited | Manufacturing | 2013 |
| Brais Masterminds Ltd | Wholesale & retail | 2026 |
| Bramall Holdings Limited | Financial services | 2015 |
| Bramall Lane Convenience Store Ltd | Wholesale & retail | 2025 |
| Bramall Lane Hotel Limited | Hospitality | 2024 |
| Bramall Lane OFF License Limited | Wholesale & retail | 2010 |
| Bramble Bunnies Limited | Information & communication | 2026 |
| Brambletop Limited | Construction | 1973 |
| Brame Technologies Limited | Information & communication | 2020 |
| Bramhall 1840 Limited | Manufacturing | 2008 |
| Bramhalls Autobodies Ltd | Wholesale & retail | 2013 |
| Bramley Barber Ltd | Other services | 2025 |
| Bramley Brooks Limited | Construction | 2013 |
| Bramley Estates RTM Company Ltd | Households | 2023 |
| Bramley Hall Limited | Professional & scientific | 2012 |
| Bramley Hall Properties Limited | Real estate | 2025 |
| Bramley Point Limited | Education | 2024 |