| Authors (Technical) Limited | Professional & scientific | 2013 |
| Autistic Freedom Films Limited | Information & communication | 2026 |
| Axon Buckley Ltd | Real estate | 1988 |
| Aylesham (Central) Residents Management Company Limited | Households | 2023 |
| B & C Autos (Cheshire) Ltd | Wholesale & retail | 2024 |
| B & J Property Developments Limited | Construction | 2007 |
| B Wood Motor Co. Ltd | Administrative & support | 2025 |
| Babington Quarter Management Company Limited | Households | 2019 |
| Badbury Green Management Company Limited | Households | 2025 |
| Baile Limited | Wholesale & retail | 2015 |
| Bailey Electrical Cheshire Limited | Construction | 2016 |
| Bailey Farms Limited | Agriculture & fishing | 1997 |
| BAP Franchise Management Ltd | Professional & scientific | 2012 |
| Barji Software Ltd | Information & communication | 2025 |
| Barleycorn Way Residents Management Company Limited | Households | 2021 |
| Barnford Productions Ltd | Arts & recreation | 2024 |
| Barnhill Gardens (Sutton-In-Ashfield) Management Company Limited | Households | 2019 |
| Barrack Quarter Management Company Ltd | Households | 2019 |
| Barrington Park Management Company Limited | Households | 2018 |
| Battalion Studio Ltd | Professional & scientific | 2021 |
| Beast Brewing Limited | Manufacturing | 2024 |
| Beaton & Rastall of Tarporley Limited | Real estate | 2018 |
| Beauchamp Gate (Uckfield) Management Company Limited | Households | 2026 |
| Beeston Construction Ltd | Construction | 2024 |
| Bekkasam (UK) Limited | Hospitality | 2018 |
| BEN Carus Stables Ltd | Agriculture & fishing | 2020 |
| BEN Hancock Props Limited | Information & communication | 2015 |
| Bentmeadows Consulting Limited | Professional & scientific | 2026 |
| Berry Hill Park Management Ltd | Construction | 2019 |
| Bespoke Custom Calipers Ltd | Wholesale & retail | 2022 |
| Bestwood (Ridgeway) Residents Management Company Limited | Households | 2023 |
| BGE Automotive Ltd | Manufacturing | 2009 |
| BHG Leisure Group Limited | Extraterritorial | 2014 |
| BHM Management Limited | Households | 2000 |
| BHV QA Consultancy Limited | Professional & scientific | 2025 |
| Bicknor Wood Ltd | Households | 2019 |
| Bigstg Limited | Extraterritorial | 2023 |
| Birchwood Grove Management Company Limited | Households | 2024 |
| BK Elson Groundworks Limited | Construction | 2010 |
| Black Square Digital Limited | Information & communication | 2017 |
| Blacksmiths Green (Ruddington) Management Company Limited | Households | 2021 |
| Blck Book Limited | Other services | 2026 |
| Blenheim Green Management Company Limited | Real estate | 2023 |
| Block F1 Canford Phase 1 Management Co Limited | Households | 2025 |
| Block F2 Canford Phase 1 Management Co Limited | Households | 2025 |
| Block G Canford Phase 1 Management Co Limited | Households | 2025 |
| Block G Primrose Gardens Management Co Limited | Households | 2025 |
| Blue Light Consultants Ltd | Professional & scientific | 2019 |
| Blue Sky Innovations Ltd | Wholesale & retail | 1998 |
| Bluehirst Ltd. | Administrative & support | 2018 |
| Bluenose Properties Limited | Real estate | 2015 |
| Bodes E-Hr Limited | Information & communication | 2002 |
| Bollin Grange (Macclesfield) Management Company Limited | Households | 2023 |
| Bombay Street Food Kitchen Ltd. | Administrative & support | 2015 |
| Bonjourvino Ltd | Wholesale & retail | 2023 |
| Bournefield Limited | Health & social care | 2021 |
| Boutique Hotel Group Limited | Professional & scientific | 2006 |
| BPO Global Interim Management Ltd | Professional & scientific | 2025 |
| Brackley Village Residents Management Company Limited | Households | 2023 |
| Bramble Wood Residential Management Company Limited | Households | 2024 |
| Branch Legal Ltd | Professional & scientific | 2022 |
| Branding Solutions Limited | Manufacturing | 2010 |
| Branton Lane Go Management Company Limited | Households | 2023 |
| Brazendale Heating and Maintenance Limited | Construction | 2008 |
| Bridge END Mill Ltd | Households | 2021 |
| Bridgewater View (Daresbury) Management Company Limited | Households | 2022 |
| Bright Rebel Coaching Ltd | Professional & scientific | 2017 |
| Broadleaf Ashby Management Company Limited | Households | 2017 |
| Broadleaf Management Company Limited | Households | 2018 |
| Broken Stone Road (Blackburn) Residents Management Company Limited | Households | 2023 |
| Brook House Property Services Limited | Real estate | 2020 |
| Brook Meadow (Penyffordd) Management Company Limited | Households | 2022 |
| Brook View (Wincham) Management Company Limited | Households | 2023 |
| Brookbury Nominees Limited | Administrative & support | 2005 |
| Brookfield (Golborne) Management Company Limited | Households | 2018 |
| Brookhay Limited | Extraterritorial | 2014 |
| Brookley Limited | Other services | 2019 |
| Brookmill Meadows Management Company Limited | Households | 2023 |
| Brookwood Meadows (Westham) Management Company Limited | Households | 2024 |
| Broomco (3020) Limited | Real estate | 2002 |
| Broster Bros Limited | Agriculture & fishing | 2021 |
| Broughton's Electrical Group Ltd | Construction | 2022 |
| Brow HQ Academy Limited | Education | 2021 |
| Broxton Gates (Property) Limited | Construction | 2016 |
| Bryjen Advisory Ltd | Administrative & support | 2026 |
| BSB Automotive Services Ltd | Wholesale & retail | 2022 |
| BSD Commercial Limited | Professional & scientific | 2010 |
| Bubble Jobs Limited | Information & communication | 2010 |
| Buckley Investments Limited | Real estate | 2006 |
| Builder Girl Glazing Ltd | Construction | 2024 |
| Builder Girl Ltd | Construction | 2019 |
| Builder Girl Properties Ltd | Real estate | 2022 |
| Building Design and Construction (Lymm) Limited | Extraterritorial | 1988 |
| Bullimore Eventing LLP | | 2014 |
| Burnmill Grange (Market Harborough) Residents Management Company Limited | Households | 2019 |
| Burt Projects Ltd | Professional & scientific | 2018 |
| Burton Hall Barns Management Company Limited | Real estate | 2004 |
| Burton Mouldings Ltd | Manufacturing | 2025 |
| Bushbury Builders Merchants Ltd | Wholesale & retail | 2002 |
| Butlers Accountancy LLP | | 2014 |