| Assured Ability Services Ltd | Administrative & support | 2024 |
| ASU UK Limited | Wholesale & retail | 2006 |
| Atkin Hallam Ltd | Real estate | 2020 |
| Aura Car Sales Ltd | Wholesale & retail | 2025 |
| Auto-Motiv Sales Limited | Wholesale & retail | 2025 |
| Autoculture Hydroponics Ltd | Wholesale & retail | 2012 |
| Automart Cars Limited | Wholesale & retail | 2017 |
| Avocet Associates Ltd | Financial services | 2023 |
| AVP Homes Ltd | Real estate | 2025 |
| Awaken Education Community CIC | Education | 2023 |
| Awaken Education Ltd | Education | 2023 |
| AZ Dream Properties Ltd | Construction | 2019 |
| AZ Management Services Limited | Real estate | 2021 |
| B & C Holding Company Limited | Financial services | 2010 |
| B & S Corby Turf Consultant Limited | Professional & scientific | 2026 |
| B & T Wholesale Limited | Wholesale & retail | 2014 |
| B C Commercial Services Limited | Wholesale & retail | 2018 |
| B Singh Estates Limited | Real estate | 2021 |
| B Strong Ltd | Arts & recreation | 2020 |
| B&M Motifs Ltd | Wholesale & retail | 2024 |
| B&M Translation Services Ltd | Professional & scientific | 2018 |
| B.S. Teasdale & SON Limited | Manufacturing | 1998 |
| Bachmanis & Company Limited | Real estate | 1997 |
| Bailey Energy Ventures Ltd | Professional & scientific | 2023 |
| Bandeira Property Investments Ltd | Real estate | 2026 |
| Bank Street Limited | Wholesale & retail | 1994 |
| Barbell&Co Ltd | Wholesale & retail | 2026 |
| Barcel Snacks UK Limited | Manufacturing | 2023 |
| Barn Direct Limited | Wholesale & retail | 1999 |
| Barnburgh SPV Ltd | Real estate | 2024 |
| Barnett Contracts Ltd | Administrative & support | 2021 |
| Barnsley Property Assets Limited | Real estate | 2025 |
| Barton Mowing Services Limited | Administrative & support | 2011 |
| Bawtry Investments Ltd | Real estate | 2026 |
| Bay Tree House (WXM) Limited | Health & social care | 2016 |
| Bb&J Developments Ltd | Construction | 2013 |
| BCO Investments Limited | Professional & scientific | 2007 |
| Bdss Limited | Transport & logistics | 2008 |
| Beasley Homes Limited | Real estate | 2022 |
| BEE YOU Counselling and Wellbeing Services CIC | Health & social care | 2020 |
| Beer Haus Cafe Bar Ltd | Hospitality | 2023 |
| Bellissima Expressions Ltd | Health & social care | 2022 |
| Beltrandi Limited | Extraterritorial | 2024 |
| BEN Scott Medical Services Limited | Health & social care | 2017 |
| Bench Holdings Limited | Financial services | 2023 |
| Bench Properties (Yorkshire) Limited | Real estate | 2023 |
| Bespoke Designs (Yorkshire) Limited | Wholesale & retail | 2023 |
| Beta Dispute Solutions Ltd | Administrative & support | 2019 |
| Betapack Limited | Wholesale & retail | 2002 |
| Bhive Bar and Venue Ltd | Hospitality | 2023 |
| Bicicleta UK Limited | Wholesale & retail | 2024 |
| Birdhouse Learning Ltd | Education | 2025 |
| Bitshift Solutions Ltd | Information & communication | 2025 |
| Black Box Training Limited | Administrative & support | 2019 |
| Black Sky Innovation (Consultancy) Ltd | Professional & scientific | 2020 |
| Blocked Drain Rotherham Ltd | Water & waste | 2026 |
| Blossoming Futures Behaviour Consultancy Limited | Health & social care | 2023 |
| Blue Line Buildings (Holdings) Limited | Financial services | 1996 |
| Blue Line Buildings Limited | Construction | 2013 |
| Blue Planet Solar Park II Limited | Energy | 2014 |
| Bluevision Holdings Limited | Real estate | 2022 |
| Bluevision Projects Ltd | Professional & scientific | 2004 |
| BMC Company (IOW) Ltd | Manufacturing | 2024 |
| Bmkl Ltd. | Financial services | 2022 |
| Booze BAN Ltd | Wholesale & retail | 2015 |
| Borders Bar Limited | Other services | 2022 |
| Bottle Decoration Solutions Limited | Manufacturing | 2013 |
| Bowie, Canham, ORR Limited | Real estate | 1999 |
| BPG Conisbrough Limited | Real estate | 2024 |
| Bphg Ltd | Real estate | 2022 |
| Bradshaw & Griffiths Properties Limited | Real estate | 2008 |
| Brampton Hall Cottages Management Limited | Households | 2017 |
| BRB Properties Ltd | Real estate | 2026 |
| Brearley & Co Accountants (Dinnington) Limited | Professional & scientific | 2017 |
| Brearley & Co Tax Limited | Professional & scientific | 2017 |
| Brearley and Co. Accountants Limited | Professional & scientific | 1998 |
| Brew & Bean Limited | Health & social care | 2013 |
| Brian Dawson Engineering Services Limited | Construction | 2006 |
| Bridge Property Group Limited | Real estate | 1987 |
| Brig Estates Ltd | Real estate | 2026 |
| Broad Horizons Social Care Limited | Health & social care | 2016 |
| Broadfield Business Centre Management Company Limited | Real estate | 1990 |
| Broadway News NSJ Ltd | Wholesale & retail | 2022 |
| Broadway Yorkshire Ltd | Hospitality | 2026 |
| Bronte Property SY Limited | Real estate | 2026 |
| Brookdale Care Home Limited | Health & social care | 2021 |
| Brookes Innovation Ltd. | Manufacturing | 2017 |
| Brookfields Farm Ltd | Agriculture & fishing | 1960 |
| Brookhouse Windows Ltd | Construction | 2004 |
| Brown & Yates Joinery by Design Limited | Construction | 2015 |
| Bryady Transport Ltd | Transport & logistics | 2018 |
| Bsmart Homes Ltd | Real estate | 2011 |
| BST Properties Limited | Real estate | 2015 |
| Bulk Haulage Holdings Limited | Financial services | 2022 |
| Busbyco Ltd | Wholesale & retail | 2022 |
| Buttons Day Nursery Limited | Education | 2004 |
| Buttons OUT of School Club Limited | Education | 2006 |
| Byteback Creative Services Limited | Information & communication | 2024 |
| C B K Systems Limited | Manufacturing | 1991 |
| C B Lettings Limited | Administrative & support | 2013 |