| Badavi Barbers Limited | Other services | 2024 |
| Badavi's Delivery Ltd | Hospitality | 2024 |
| Baddestinfluencers Limited | Information & communication | 2024 |
| Baddonbrooks Ltd | Information & communication | 2024 |
| Badger Design Limited | Wholesale & retail | 1998 |
| Baems Limited | Health & social care | 2017 |
| BAHATI19 Limited | Wholesale & retail | 2012 |
| Bainbridge and Tapp Distilling Company Limited | Manufacturing | 2024 |
| Baker Associates Ltd | Professional & scientific | 2008 |
| Baker Cole Ltd | Financial services | 2024 |
| Balain Investments Limited | Health & social care | 2025 |
| Ball Estates Hungerford Ltd | Real estate | 2019 |
| Balloons (Devon) | Health & social care | 2011 |
| Balogs Cafe Ltd | Hospitality | 2023 |
| Balustrade (South West) Limited | Construction | 2014 |
| Bamber Enterprises Limited | Real estate | 2023 |
| Bamboo Dwellings Ltd | Real estate | 2019 |
| Banana Pancakes Limited | Financial services | 2024 |
| Bandstars CIC | Education | 2023 |
| Banfield Security Group Limited | Administrative & support | 2016 |
| Banjo Consultancy Services Ltd | Professional & scientific | 2025 |
| Bankside Ltd | Professional & scientific | 2024 |
| Bankside Systems Limited | Information & communication | 1999 |
| Banstead Boilers Ltd. | Construction | 2002 |
| Bantasan Limited | Wholesale & retail | 2020 |
| Banu Hashia Limited | Real estate | 2024 |
| Baobab Ebooks Services Limited | Other services | 2013 |
| Baptist Church Broadclyst Management Company Limited | Households | 2013 |
| Barber 2 Exeter Ltd | Other services | 2026 |
| BARBER1 Exeter Ltd | Other services | 2024 |
| BARBER1 Sidwell Ltd | Other services | 2026 |
| Barbican 19 (Lettings) Limited | Real estate | 2020 |
| Barbican 19 Limited | Construction | 2005 |
| Barbiere Ltd | Other services | 2017 |
| Barc Architects Limited | Professional & scientific | 2012 |
| Barc Build Limited | Construction | 2020 |
| Barc Design and Build Limited | Financial services | 2020 |
| Barclay&Co Ltd | Construction | 2024 |
| Bare Beauty Exeter Limited | Other services | 2026 |
| Baring Crescent Gardens Limited | Households | 2025 |
| Bark + Bay Architects Ltd | Professional & scientific | 2025 |
| Barley Manor Lettings Limited | Real estate | 2018 |
| Barley Manor Properties Limited | Construction | 2009 |
| Barley Mews (Exeter) Management Company Limited | Households | 2007 |
| Barleywood Homes Ltd | Construction | 2023 |
| Barlow Tree Limited | Real estate | 2017 |
| Barn Florist Ltd | Wholesale & retail | 2021 |
| Barn on PIG Lane Ltd | Real estate | 2021 |
| Barnard Accountancy Ltd | Professional & scientific | 2023 |
| Barncrest NO. 131 Limited | Real estate | 2001 |
| Barncrest NO. 30 Limited | Professional & scientific | 1996 |
| Barnfield Dental Studio Ltd | Health & social care | 2018 |
| Barnova Ltd | Hospitality | 2018 |
| Barnstaple Security Limited | Administrative & support | 2000 |
| Barnstaple Travel Clinic Limited | Health & social care | 2019 |
| Barny LEE Marquees Limited | Administrative & support | 2009 |
| Baros Services Ltd | Information & communication | 2018 |
| Barr Atoll Limited | Professional & scientific | 2010 |
| Barrelled Locksmiths Limited | Manufacturing | 2023 |
| Barriers to Bridges CIC | Information & communication | 2023 |
| Barry Anthony Wright Limited | Mining & quarrying | 2024 |
| Barton Block & Stone Limited | Wholesale & retail | 1995 |
| Barton Clark Properties Limited | Real estate | 2004 |
| Barton Cross Developments Ltd | Construction | 2017 |
| Barton Cross Hotel Limited | Hospitality | 2018 |
| Barton Grange Management Company (Sandford) Limited | Households | 2025 |
| Barton House Owners Limited | Real estate | 2014 |
| Barton Law Ltd | Professional & scientific | 2021 |
| Barton Meadows Management Company Limited | Households | 2017 |
| Bartonpubs Ltd | Hospitality | 2025 |
| Bartons Prior Limited | Real estate | 2006 |
| BAS Financial Limited | Information & communication | 2018 |
| Base Planning Consultants Limited | Professional & scientific | 2022 |
| Base-Flow Ltd | Professional & scientific | 2018 |
| Basecgi Limited | Arts & recreation | 2014 |
| Bast Limited | Agriculture & fishing | 1994 |
| Batheson Ltd | Extraterritorial | 2002 |
| Battalionaire Limited | Information & communication | 2016 |
| Battens Farm Solar Park Limited | Energy | 2012 |
| Battles of London Ltd | Manufacturing | 2016 |
| BAU Realisations (2024) Limited | Construction | 2012 |
| Bay Improvements Limited | Construction | 2025 |
| Bay Spark Ltd. | Professional & scientific | 2015 |
| Bay Tree Services (SW) Limited | Agriculture & fishing | 2009 |
| Bayberry House Ltd | Health & social care | 2024 |
| Bayburn Homes Ltd | Real estate | 2024 |
| Bayhen Ltd | Health & social care | 2025 |
| BAZ & Coco Ltd | Wholesale & retail | 2026 |
| Bazley Associates Limited | Other services | 2018 |
| BB Laser Design Ltd | Manufacturing | 2022 |
| BB Management Company Limited | Professional & scientific | 2020 |
| BB Sports Distributors (Incorporating Team Direct) Limited | Wholesale & retail | 2020 |
| BB Trio Ltd | Transport & logistics | 2025 |
| BB9 Limited | Wholesale & retail | 2025 |
| Bbcollectibles Ltd | Wholesale & retail | 2025 |
| BC Distributions Ltd | Wholesale & retail | 2026 |
| BCH (Sibford) Ltd | Construction | 2024 |
| BCH Operations Limited | Households | 2026 |
| BCL Formwork Ltd | Construction | 2018 |
| BCL Plant Limited | Administrative & support | 2023 |