| Azeeky Trading Ltd | Wholesale & retail | 2016 |
| Azovstal Foundation CIC | Administrative & support | 2025 |
| Aztec Scaffolding (SW) Limited | Construction | 2020 |
| Aztech Infoway Limited | Information & communication | 2025 |
| Azure Aesthetics Well-Being Ltd | Other services | 2025 |
| Azure Plymouth Limited | Households | 2002 |
| Azure Surgical Limited | Health & social care | 2023 |
| B & C Carpentry (South West) Limited | Construction | 2006 |
| B & C Carpentry Limited | Manufacturing | 1996 |
| B & H Access Scaffolding and Bricklaying Services Limited | Construction | 2012 |
| B & K Property (SW) Limited | Real estate | 2006 |
| B & M Freehold Management Limited | Real estate | 2019 |
| B & R Heating Limited | Construction | 2004 |
| B Coles Plumbing & Heating Ltd | Construction | 2017 |
| B E Property Developments Ltd | Real estate | 2016 |
| B Electrical Services (SW) Ltd | Construction | 2013 |
| B Graham Limited | Professional & scientific | 2015 |
| B H M Holdings Limited | Financial services | 2018 |
| B J & R Properties Limited | Real estate | 2023 |
| B Kleen Car Wash Ltd | Administrative & support | 2024 |
| B M Developments (SW) Ltd | Construction | 2019 |
| B&B Car Wash Ltd | Administrative & support | 2025 |
| B&H Bricklaying & Construction Ltd | Construction | 2026 |
| B&S Event Ltd | Hospitality | 2025 |
| B-Bar (SW) Ltd | Hospitality | 2010 |
| B-Safe Fire Protection Ltd | Other services | 2023 |
| B.M's Motor Specialist Ltd | Wholesale & retail | 2025 |
| B.T. Developments Limited | Real estate | 1999 |
| B1 Nails & Spa Ltd | Other services | 2024 |
| B3G Limited | Other services | 2012 |
| B:Web Ltd | Information & communication | 2005 |
| Baba Street Foods Ltd | Hospitality | 2023 |
| Baba's 40 Dishes Limited | Hospitality | 2020 |
| Babas 1992 Ltd | Hospitality | 2023 |
| Babbage Construction Home Counties Ltd | Construction | 2018 |
| Babin London Ltd | Manufacturing | 2022 |
| Baby COW Limited | Wholesale & retail | 2023 |
| Baby'Roo Ltd | Wholesale & retail | 2019 |
| Back of Beyond Limited | Wholesale & retail | 2005 |
| Back to the Ranch Ltd | Real estate | 2024 |
| Backline Limited | Information & communication | 2025 |
| Badavi's Lounge Limited | Hospitality | 2022 |
| Badger Grips Limited | Information & communication | 2013 |
| Badgerface Properties Limited | Real estate | 2023 |
| Bagley Organised Ltd | Households | 2024 |
| Bags&Boxesuk Ltd | Administrative & support | 2021 |
| BAH Hollett Ltd | Hospitality | 2026 |
| Bailey Partnership (Consultants) LLP | | 2017 |
| Bailey Partnership (Group) Ltd | Professional & scientific | 2024 |
| Bailey Partnership (Holdings) Ltd | Professional & scientific | 2024 |
| Bailey Partnership (Solutions) Ltd | Construction | 2025 |
| Bailey Professional Manufacture Limited | Manufacturing | 2026 |
| Bair-Con (SW) Ltd | Construction | 2019 |
| Bakare Beds Limited | Manufacturing | 1993 |
| Bakare EOT Limited | Manufacturing | 2026 |
| Bakare Holdings Limited | Financial services | 2025 |
| Bakare Limited | Other services | 1997 |
| Bakehouse Workshop Falmouth Ltd | Hospitality | 2018 |
| Baker and Baker Consulting Solutions Ltd | Information & communication | 2010 |
| Baker Burley Limited | Construction | 1999 |
| Baker Carpentry Limited | Manufacturing | 2023 |
| Baker Investment Properties Ltd | Real estate | 2017 |
| Baker Kitchens (Plymouth) Limited Limited | Construction | 2016 |
| Bakers Removals and Haulage Limited | | 1985 |
| Bala (SW) Limited | Hospitality | 2019 |
| Balance for Business Ltd | Financial services | 2010 |
| Balcanic Express Logistics Ltd | Transport & logistics | 2021 |
| Balconies & Balustrades Limited | Manufacturing | 2010 |
| Bald Cafe Limited | Wholesale & retail | 2018 |
| Baldwin Technology Limited | Manufacturing | 1975 |
| Balea Hydrographic Services Ltd | Professional & scientific | 2018 |
| Ball Bubbas Ltd | Arts & recreation | 2022 |
| Ballard Youth Activity Trust | Arts & recreation | 2011 |
| Balmain Care Home Limited | Health & social care | 2007 |
| Baltic Wharf Totnes Management Company Limited | Real estate | 2013 |
| Balvur Ltd | Education | 2025 |
| BAM Precision (Engineering) & Manufacturing LLP | | 2022 |
| Bambinos Limited | Health & social care | 1994 |
| Bamboo Clothing Ltd | Wholesale & retail | 2004 |
| Bamboo-Growth Holdings Ltd | Financial services | 2024 |
| Bamboo-Growth Ltd | Professional & scientific | 2020 |
| Bamford Care Homes Limited | Health & social care | 1999 |
| Bamo 24 Ltd | Hospitality | 2024 |
| Bamo Grill House Ltd | Hospitality | 2025 |
| Bampfylde Surgery Management Company Limited | Households | 2018 |
| Bamt SW Limited | Real estate | 2024 |
| Bana BB Barbers Ltd | Other services | 2025 |
| Banks Carpentry & Construction Ltd | Manufacturing | 2021 |
| Bannawell Court Residents Association Limited | Households | 1999 |
| Bapman & Hoggin' Ltd | Hospitality | 2018 |
| Bar Rumba Ltd | Other services | 2025 |
| Bar UZO Limited | Hospitality | 2018 |
| Barbers (Plymouth) Ltd | Other services | 2002 |
| Barbers Against Prostate Cancer CIC | Education | 2023 |
| Barbican Barbers Ltd | Other services | 2023 |
| Barbican Beauty Limited | Other services | 2015 |
| Barbican Bookkeepers Ltd | Professional & scientific | 2011 |
| Barbican Botanics Limited | Hospitality | 2025 |
| Barbican Chinese Limited | Hospitality | 2018 |
| Barbican Kebab & Pizza Ltd | Hospitality | 2016 |