| AZL Ltd | Wholesale & retail | 2023 |
| Azotic Technologies ( North America ) Limited | Professional & scientific | 2015 |
| Azotic Technologies Limited | Professional & scientific | 2012 |
| B & B Bespoke Craftmanship Limited | Administrative & support | 2021 |
| B & R Associates LLP | | 2024 |
| B - I- S Supplies Ltd | Wholesale & retail | 2021 |
| B - Logik Limited | Information & communication | 2012 |
| B a Holdings Ltd | Real estate | 2020 |
| B Bird Limited | Wholesale & retail | 2025 |
| B H Groundworks Limited | Administrative & support | 2015 |
| B H P (Crushing & Screening) Ltd | Wholesale & retail | 2005 |
| B Jeffrey Civil Engineering Limited | Construction | 2019 |
| B Jeffrey Construction Limited | Construction | 1997 |
| B Swales Groundworks and Developments Limited | Construction | 2021 |
| B&A Business Solutions Ltd | Professional & scientific | 2024 |
| B&B Investments (York) Ltd | Real estate | 2022 |
| B&E Catering Ltd | Hospitality | 2025 |
| B&J Property and Estate Ltd | Real estate | 2023 |
| B&J Trade Limited | Wholesale & retail | 2022 |
| B&J York Ltd | Wholesale & retail | 2025 |
| B.& A.Allison Investment Company Limited | Real estate | 1963 |
| B.J. Fennell Limited | Financial services | 1972 |
| B.J. Lighting Supplies Limited | Wholesale & retail | 1985 |
| B.L.S. Business Consultants Limited | Professional & scientific | 1989 |
| B.Newellroofing Ltd | Construction | 2024 |
| B10 MED Properties Limited | Financial services | 1996 |
| BA Coates & Sons Ltd | Construction | 2005 |
| BA Medical Imaging Ltd | Health & social care | 2019 |
| BAA Tooling Limited | Manufacturing | 2006 |
| BAB Enterprises Limited | Professional & scientific | 2019 |
| Babili Services Ltd | Information & communication | 2004 |
| Baby Boy's Kitchen Ltd | Hospitality | 2023 |
| Baby Cloud Play Ltd | Wholesale & retail | 2021 |
| Back Pocket Office Ltd | Administrative & support | 2023 |
| Backbridge (Malmesbury) Management Company Limited | Households | 2022 |
| Backdrop Consultants Limited | Administrative & support | 2021 |
| Backgammon Data Limited | Information & communication | 2026 |
| Backspacers Ltd | Professional & scientific | 2024 |
| Bacs- Aviation Consultancy Services Limited | Construction | 2019 |
| Bacs-Real Estate (York) Limited | Real estate | 2025 |
| Badapple Theatre Company | Arts & recreation | 2002 |
| Badastral Books Limited | Information & communication | 2012 |
| Badbury Park (Swindon) Management Company Limited | Households | 2014 |
| Badbury Park (Swindon) NO 2 Management Company Limited | Households | 2014 |
| Badbury Park (Swindon) NO 3 Management Company Limited | Households | 2021 |
| Badger Court Flats, Limited | Real estate | 1966 |
| Badger Hill Ltd | Wholesale & retail | 2022 |
| Badger Hotels Limited | Hospitality | 1978 |
| Badgerantiques Limited | Wholesale & retail | 2025 |
| Badgerspace Ltd | Information & communication | 2021 |
| BAE Limited | Professional & scientific | 2019 |
| Bafu Ventures Ltd | Wholesale & retail | 2021 |
| Bagniamici Limited | Extraterritorial | 2011 |
| Bailey Cooper Limited | Professional & scientific | 2004 |
| Bailey Dobson Ltd | Health & social care | 2022 |
| Bailey Rail & Logistics Limited | Transport & logistics | 2021 |
| Bailey Renewable Solutions Ltd | Construction | 2023 |
| Baileywood Close Management Company Limited | Professional & scientific | 2007 |
| Bainbridge 1890 Ltd | Professional & scientific | 2018 |
| Bainespropertygroup Ltd | Real estate | 2025 |
| Baird Green Ltd | Manufacturing | 2025 |
| BAJ Enterprises Limited | Real estate | 2015 |
| Bakeplan Software Limited | Information & communication | 2000 |
| Baker & FOX Bathrooms and Plumbing Ltd | Construction | 2024 |
| Baker Creative Ltd | Professional & scientific | 2019 |
| Baker Street Bakers Ltd | Hospitality | 2021 |
| Baker Ventures Ltd | Administrative & support | 2016 |
| Bakers Property Investments Ltd | Real estate | 2026 |
| Bakweb Limited | Information & communication | 2026 |
| BAL Fuel Sources Limited | Construction | 2025 |
| BAL Management Services Limited | Construction | 2022 |
| Balance of Sweetness LLP | | 2023 |
| Balance Planning Solution Limited | Professional & scientific | 2020 |
| Baldard Estates Ltd | Construction | 2025 |
| Baldr Lighting Limited | Professional & scientific | 2022 |
| Baldwin Commercial Services Limited | Professional & scientific | 2018 |
| Baldwin Sharp Investments Limited | Financial services | 2025 |
| Balgarnie Fabric Ltd | Wholesale & retail | 2020 |
| Ballinger (UK) Limited | Information & communication | 2012 |
| Ballyhana Electrical Solutions Limited | Professional & scientific | 2016 |
| Balou Properties Ltd. | Real estate | 2024 |
| Baltic Food York Limited | Wholesale & retail | 2017 |
| Bamboo Thai Takeaway Ltd | Hospitality | 2014 |
| Bamburgh Properties Limited | Hospitality | 2023 |
| Bamo Holdings Ltd | Financial services | 2024 |
| Bandasson Company Ltd | Transport & logistics | 2025 |
| Bankers Cat Limited | Hospitality | 2019 |
| Bankhall Support Services Limited | Financial services | 1993 |
| Banklink Ltd | Agriculture & fishing | 2005 |
| Banks Developments York Limited | Construction | 2018 |
| Bannerbrook Park Phase II (Coventry) Management Company Limited | Households | 2021 |
| Bannerdale Limited | Professional & scientific | 2002 |
| Banners Fisheries Limited | Hospitality | 2017 |
| Bannister Court Management Company Limited | Households | 1996 |
| Bantu Digital Ltd | Information & communication | 2023 |
| Bantu Ventures Ltd | Professional & scientific | 2017 |
| Baobab Ltd | Professional & scientific | 2003 |
| Bar Jubilee Ltd | Hospitality | 2025 |
| Bar Lane York Ltd | Real estate | 2021 |
| Barakah Real Estate Partners Limited | Real estate | 2022 |