| BP Equities Limited | Real estate | 2021 |
| Bpfj Limited | Other services | 2019 |
| BPL Trans Ltd | Transport & logistics | 2017 |
| BR (Mutley) Limited | Hospitality | 2019 |
| BR Accounting & Business Services Ltd | Professional & scientific | 2018 |
| Braddons of Plymouth Ltd | Wholesale & retail | 2019 |
| Brady Property Maintenance Ltd | Construction | 2022 |
| Brainworktherapy Ltd | Health & social care | 2018 |
| Brambles Boutique Limited | Wholesale & retail | 2026 |
| Bramman Engineering Management Ltd | Professional & scientific | 2025 |
| Branchwise Tree Care Ltd | Agriculture & fishing | 2024 |
| Brand Biscuit Limited | Professional & scientific | 2020 |
| Brand by Design Studio Ltd | Professional & scientific | 2022 |
| Brand Jamaica FES CIC | Hospitality | 2025 |
| Bray Building Developments Limited | Construction | 2014 |
| Bread and Roses Community Arts Hub C.I.C. | Hospitality | 2013 |
| Break Publishing Ltd | Information & communication | 2016 |
| Breaktime News Ltd | Information & communication | 2021 |
| Breakwater Estates Limited | Real estate | 2015 |
| Breakwater Financial Planning Limited | Financial services | 2016 |
| Breakwater Holdings Limited | Administrative & support | 2018 |
| Breakwater House Management Company Limited | Households | 1997 |
| Breakwater Medical Limited | Health & social care | 2021 |
| Breakwater Psychology Ltd | Health & social care | 2025 |
| Brenda & Doris Ltd | Manufacturing | 2020 |
| Brenta SKI Limited | Arts & recreation | 2005 |
| Brento Camper Services Ltd | Professional & scientific | 2024 |
| Breton House Management Limited | Extraterritorial | 2002 |
| Bretonside Holdings Ltd | Real estate | 2021 |
| Brew Hound Ltd | Hospitality | 2025 |
| Brew Line Systems Ltd | Professional & scientific | 2020 |
| Brews Group Ltd | Hospitality | 2021 |
| Briar Hill Limited | Hospitality | 2000 |
| Briar Surveying Ltd | Professional & scientific | 2026 |
| Bridge House Freehold Management Company Limited | Households | 1997 |
| Bridway Management Limited | Households | 1991 |
| Briggs Fire and Security Distribution Limited | Professional & scientific | 2022 |
| Briggs Fire and Security Limited | Administrative & support | 2016 |
| Briggs Group Holdings Limited | Financial services | 2023 |
| Bright (South West) LLP | | 2006 |
| Bright Beams Day Nurseries Limited | Health & social care | 2024 |
| Bright Path Interventions Ltd | Education | 2025 |
| Bright Sparks Childrens Centre Limited | Education | 2003 |
| Bright Stars Plymouth C.I.C. | Education | 2016 |
| Brighter Property Management Ltd | Administrative & support | 2026 |
| Brighton Developments Group Ltd | Hospitality | 2019 |
| Brighton Student Developments Ltd | Hospitality | 2016 |
| Brightsidesw Ltd | Administrative & support | 2023 |
| Brikbloc Ltd. | Construction | 2019 |
| Brile Enterprise Ltd | Information & communication | 2026 |
| Brimful Drinks Limited | Professional & scientific | 2019 |
| Brims Creation Limited | Hospitality | 2025 |
| Brind Events Ltd | Hospitality | 2025 |
| Bring IT Consulting Ltd | Professional & scientific | 2013 |
| Brinsden Equestrian Services Limited | Agriculture & fishing | 2026 |
| Brinsden Surgical Services Limited | Health & social care | 2014 |
| Brisley Limited | Information & communication | 2026 |
| Britain's GOT Limited | Wholesale & retail | 2025 |
| Britcey Global Sourcing Ltd | Wholesale & retail | 2025 |
| British Filters Limited | Manufacturing | 1999 |
| British Marine Federation South West | Other services | 2004 |
| British Society of Urogenital Radiology | Education | 2012 |
| Britpk Community Interest Company | Education | 2025 |
| Britt Cart Limited | Wholesale & retail | 2025 |
| Brixham Stores Ltd | Wholesale & retail | 2024 |
| Brixton Court Management Limited | Real estate | 1990 |
| Brixton Fish Bar Limited | Hospitality | 2010 |
| BRL Architects Limited | Professional & scientific | 2015 |
| Broad Park Management Co. Limited | Real estate | 1983 |
| Broad Reach Business Services Ltd | Other services | 2005 |
| Broadband Access Strategies LLP | | 2002 |
| Broadoak Construction (Devon) Limited | Construction | 2008 |
| Broadoaks Cottages Limited | Households | 2000 |
| Broadway Carpets (SW) Limited | Construction | 2017 |
| Brody Forbes Limited | Professional & scientific | 2012 |
| Broken Record Films Limited | Information & communication | 2022 |
| Brolly Lolly Ltd | Administrative & support | 2013 |
| Bronzed Tanning Plymouth Ltd | Other services | 2025 |
| Brook Street Property Investments Limited | Real estate | 2022 |
| Brooke Media Services Ltd | Information & communication | 2021 |
| Brooklands RMC Ltd | Households | 2024 |
| Brookmar Limited | Real estate | 2013 |
| Brooks Facility Services Ltd | Administrative & support | 2025 |
| Brooks Store Limited | Wholesale & retail | 2023 |
| Brookside Close Management Company Limited | Extraterritorial | 1986 |
| Brookson (5079H) Limited | Administrative & support | 2007 |
| Broom Park RTM Company Limited | Households | 2021 |
| Brother & Sons Limited | Wholesale & retail | 2015 |
| Brow Envy Ltd | Other services | 2016 |
| Brow Envy Training Ltd | Other services | 2019 |
| Brown & Evans Carpentry Limited | Construction | 2005 |
| Brown Bear Chapel Ltd | Households | 2023 |
| Browne's Chocolates Limited | Manufacturing | 2004 |
| Brownleaf Ltd | Administrative & support | 2026 |
| Brownnie's Limited | Wholesale & retail | 2026 |
| Brownstone Lodge RTM Company Limited | Households | 2007 |
| Bruce Auger Limited | Construction | 2014 |
| Brudnik Limited | Wholesale & retail | 2011 |
| Brulin Properties Limited | Real estate | 2011 |
| Brunel Accounting Services (Plymouth) Limited | Professional & scientific | 2010 |