| AXM (Mountfield) Limited | Construction | 2023 |
| AXM (SPV1) Limited | Construction | 2025 |
| AXM (Summerfield) Limited | Construction | 2025 |
| AXM Partners Limited | Construction | 2025 |
| Axtron Integrated Solutions Ltd | Wholesale & retail | 2022 |
| Ayma International Group Ltd | Wholesale & retail | 2025 |
| Azesta Limited | Administrative & support | 1999 |
| Azibo Holidays Ltd | Hospitality | 2020 |
| Azibo Properties Ltd | Real estate | 2020 |
| Azure Life Luxury Limited | Professional & scientific | 2019 |
| B & J Trading Ltd | Real estate | 2016 |
| B Convenience Ltd | Wholesale & retail | 2025 |
| B H P Associates Limited | Other services | 2023 |
| B L Welding and Fabrications Ltd | Manufacturing | 2020 |
| B Medical Aesthetics Ltd | Other services | 2025 |
| B&D Property Group Ltd | Real estate | 2025 |
| B-Hive Partnership Ltd | Professional & scientific | 2020 |
| B1 Environmental Pollution Treatment System Company Ltd | Wholesale & retail | 2024 |
| B1ANCA Ltd | Wholesale & retail | 2021 |
| B1CEP Ltd | Extraterritorial | 2016 |
| B1LL Ltd | Extraterritorial | 2026 |
| B1NANCE Limited | Extraterritorial | 2021 |
| B1O Ltd | Extraterritorial | 2026 |
| B1TCLOUT Limited | Wholesale & retail | 2021 |
| B1TCOIN Ltd | Extraterritorial | 2021 |
| B2 Corporate Ltd | Construction | 2023 |
| B2B Conferences Limited | Information & communication | 2001 |
| B4RRY Limited | Extraterritorial | 2021 |
| BA1LEY Limited | Extraterritorial | 2020 |
| BAA Bar Trustees Limited | Administrative & support | 2024 |
| Baan Thai Services Ltd | Health & social care | 2021 |
| Babe Magnet Ltd | Extraterritorial | 2012 |
| BACCHUS92 Limited | Hospitality | 2015 |
| Baccus Limited | Extraterritorial | 2026 |
| Back to TV Limited | Information & communication | 2017 |
| BAH Investment Limited | Arts & recreation | 2023 |
| Bailey Partners LLP | | 2009 |
| Baird Recruitment Ltd | Administrative & support | 2020 |
| Bakerstreet.Games Ltd | Information & communication | 2025 |
| Bakery Cafe 31 Ltd | Hospitality | 2026 |
| Balance FD Limited | Professional & scientific | 2022 |
| Balancedietitians Limited | Administrative & support | 2017 |
| Baleigh Holdings Limited | Financial services | 2026 |
| Baleigh Investments Limited | Wholesale & retail | 2018 |
| Baleigh Properties Ltd | Real estate | 2018 |
| Ball Developments Ltd | Construction | 2025 |
| Ball Property Group Ltd | Construction | 2025 |
| Ballantyne Properties Ltd | Real estate | 2018 |
| Ballastri Limited | Financial services | 2026 |
| Balloons Over Yorkshire Limited | Arts & recreation | 2015 |
| Balman Limited | Extraterritorial | 2026 |
| Baltzersens Ltd | Manufacturing | 2011 |
| Bambinos HG1 Limited | Hospitality | 2026 |
| Bamboo Panda Harrogate Ltd | Hospitality | 2025 |
| Bank House (Leeds) Limited | Real estate | 2003 |
| Banks Restaurants & Hotels Limited | Hospitality | 2006 |
| BAO Ying Ltd | Hospitality | 2025 |
| Bar Leisure Property Ltd | Real estate | 2022 |
| Baracc Limited | Professional & scientific | 2019 |
| Barbadillo Limited | Wholesale & retail | 2024 |
| Barber & Mack Limited | Other services | 2015 |
| Barber Property Group Limited | Real estate | 2025 |
| Barc Property Limited | Households | 2021 |
| Barclay Advisory Ltd | Professional & scientific | 2024 |
| Barclay LED Solutions Limited | Construction | 2015 |
| Barclay Watt Estates Harrogate Ltd | Real estate | 2021 |
| Bargain Zone (ALI ) Ltd | Wholesale & retail | 2025 |
| Bark Smart CIC | Education | 2025 |
| Barker Brooks Properties Ltd | Real estate | 2000 |
| Barkers Holt Wind Farm Limited | Energy | 2025 |
| Barkers of Harrogate Limited | Wholesale & retail | 1996 |
| Barkley Apartments Limited | Construction | 2006 |
| Barkway Property Holdings Limited | Real estate | 2008 |
| Barnabas Finance Ltd | Professional & scientific | 2023 |
| Barnabas Ventures Limited | Real estate | 2021 |
| Barnsley Cars Limited | Wholesale & retail | 2022 |
| Barnstaple IT Ltd | Information & communication | 2024 |
| Baroque House Limited | Extraterritorial | 2017 |
| Baroque Property Services Limited | Administrative & support | 2017 |
| Barrel and Squidger Limited | Information & communication | 2017 |
| Barritch Consulting Ltd. | Professional & scientific | 2015 |
| Barry Carter Motor Products Limited | Wholesale & retail | 1988 |
| Barry Noble Unlimited | Extraterritorial | 2000 |
| Bartle Equestrian Consultancy Limited | Education | 2014 |
| Barvelo Ltd | Hospitality | 2021 |
| Base 3 Systems Limited | Information & communication | 1996 |
| Base Building Consultancy Ltd | Administrative & support | 2008 |
| Base Electrical (Harrogate) Limited | Construction | 2009 |
| Bask Swimwear Ltd | Wholesale & retail | 2025 |
| Batch & Peel Ltd | Manufacturing | 2026 |
| Batley & Robinson(Worsteds)Limited | Manufacturing | 1950 |
| Batoday Limited | Professional & scientific | 2023 |
| Batoka Limited | Professional & scientific | 2014 |
| Baty Casson Long Limited | Extraterritorial | 1956 |
| Baxburne Investments Limited | Real estate | 1970 |
| Baxellien Ltd | Professional & scientific | 2008 |
| Baxters Garage Limited | Wholesale & retail | 2003 |
| Baxx UK Limited | Wholesale & retail | 2008 |
| Baybridge Executive Search Group Ltd | Administrative & support | 2025 |
| Bayford Consultants Limited | Professional & scientific | 2014 |