| Bamboo Innovation Limited | Wholesale & retail | 2026 |
| Bang on Autoworx Ltd | Wholesale & retail | 2025 |
| Banyak Films Limited | Information & communication | 2007 |
| Barbara Mackay Limited | Professional & scientific | 2007 |
| Barbara Scott Aromatics Ltd | Manufacturing | 2017 |
| Barneys Close Management Company Limited | Households | 1996 |
| Bath Orchard Ltd | Agriculture & fishing | 2025 |
| Battens Jewellers Ltd | Other services | 2002 |
| Bay Bites Dorset Ltd | Hospitality | 2026 |
| Bayview Court Residents Society Limited | Households | 1978 |
| BB Products Ltd | Wholesale & retail | 2016 |
| Beach Restaurants Ltd | Hospitality | 2020 |
| Beachcombers Management Limited | Households | 2004 |
| Beauchamps | | 2006 |
| Beaumont Project Management Limited | Professional & scientific | 2014 |
| Beauty and Beyond (Bridport) Limited | Other services | 2018 |
| Bellas of Bridport Limited | Hospitality | 2022 |
| BEN Freeman Electrical Ltd | Construction | 2024 |
| Benzoni Services Limited | Professional & scientific | 2012 |
| Berkeley Court (Bridport) Limited | Households | 2000 |
| Bibby & Legge Limited | Extraterritorial | 2000 |
| Billy Mumford Limited | Arts & recreation | 2024 |
| Blab Media Ltd | Information & communication | 2018 |
| Blackdown Trading Limited | Other services | 2016 |
| Blakesleys Ltd | Wholesale & retail | 2020 |
| BLD Associates Ltd | Real estate | 2026 |
| Bone Black Limited | Construction | 2012 |
| Bonhays Limited | Hospitality | 2020 |
| Bowditch Countryside Management Limited | Agriculture & fishing | 2019 |
| Bowes Brooks Accountants Ltd | Professional & scientific | 2014 |
| Boyds Bikes Limited | Wholesale & retail | 2015 |
| Brand and Soul Limited | Information & communication | 2002 |
| Brandling Limited | Professional & scientific | 2019 |
| Brassica Forno Ltd | Hospitality | 2019 |
| Brettingham Draper LLP | | 2026 |
| Brfc Enterprises Limited | Hospitality | 2022 |
| Brid Bay Cleaning Ltd | Administrative & support | 2025 |
| Bride Valley Wines Limited | Wholesale & retail | 2023 |
| Bridec Melamine Boards Limited | Manufacturing | 1978 |
| Bridmet Limited | Professional & scientific | 2008 |
| Bridport (East Street) Management Limited | Real estate | 1988 |
| Bridport and West Dorset Golf Club Limited(The) | Arts & recreation | 1947 |
| Bridport and West Dorset Golf Club Trading Limited | Arts & recreation | 2016 |
| Bridport and West Dorset Sports Trust Limited | Arts & recreation | 1975 |
| Bridport Area Development Trust | Other services | 2009 |
| Bridport Arts Centre | Arts & recreation | 1998 |
| Bridport Bakery Ltd | Manufacturing | 2024 |
| Bridport Building Supplies Limited | Wholesale & retail | 2011 |
| Bridport Caravan Storage Ltd | Real estate | 2020 |
| Bridport Carnival Committee Limited | Arts & recreation | 1998 |
| Bridport Centre for Foot Health Limited | Health & social care | 2006 |
| Bridport Electric Palace Company Limited | Arts & recreation | 2014 |
| Bridport Enterprise Supporting Training Limited | Education | 2012 |
| Bridport Football Club Limited | Arts & recreation | 2003 |
| Bridport GIG Club Ltd | Arts & recreation | 2014 |
| Bridport Glass and Tile Centre Ltd | Construction | 2002 |
| Bridport Investments Limited | Real estate | 2026 |
| Bridport Lighting Ltd | Wholesale & retail | 2016 |
| Bridport Limited | Professional & scientific | 1947 |
| Bridport Masonic Hall,Limited(The) | Other services | 1925 |
| Bridport Museum Trust Limited | Arts & recreation | 2002 |
| Bridport Plumbing and Heating Supplies Ltd | Wholesale & retail | 2011 |
| Bridport School of Regenerative Textiles CIC | Education | 2024 |
| Bridport Self Storage Ltd | Real estate | 2025 |
| Bridport Shutters Ltd | Wholesale & retail | 2024 |
| Bridport Sushi Ltd | Hospitality | 2025 |
| Bridport Upholstery Ltd | Manufacturing | 2015 |
| Brighthay Escapes Limited | Administrative & support | 2017 |
| Brittany Forest Lakes Limited | Arts & recreation | 2020 |
| Brittlestar Publishing Ltd | Information & communication | 2019 |
| Broadoak Land Co-Op Limited | Agriculture & fishing | 2004 |
| Broadtech Ltd | Information & communication | 2016 |
| Brow Drip Ltd | Other services | 2022 |
| Brownlie Ernst & Marks Limited | Professional & scientific | 2013 |
| Bruce Cocks Showcomms Limited | Information & communication | 2002 |
| Brute Squad Films Limited | Construction | 2005 |
| Brydian Arboriculture Ltd | Administrative & support | 2025 |
| Brydian Mews Management Company Limited | Real estate | 2006 |
| Buena Mano Investments Ltd | Real estate | 2025 |
| Build a Brick Ltd | Construction | 2026 |
| Building a Neurodiverse Community CIC | Health & social care | 2026 |
| Burton Mill Management Company Ltd | Hospitality | 2012 |
| Burwoods Domestic Appliances Ltd | Wholesale & retail | 2005 |
| Busby & Busby Limited | Real estate | 2008 |
| Busby Auctions Ltd | Wholesale & retail | 2013 |
| BWR Property Limited | Real estate | 2025 |
| BY IAN ROE Ltd | Information & communication | 2022 |
| C & a Rawlings & SON Limited | Wholesale & retail | 2004 |
| C & L Contracting Limited | Agriculture & fishing | 2013 |
| C H G South West Employees Trustees Limited | Administrative & support | 2024 |
| C H G South West Holdings Limited | Financial services | 2020 |
| C H G South West Limited | Construction | 2016 |
| C W Groves & SON Limited | Wholesale & retail | 2004 |
| C.J. Wilde Limited | Construction | 1998 |
| C.Rown & Empire Camping Company Ltd | Manufacturing | 2019 |
| California Dreaming Ltd | Real estate | 2010 |
| Calmsound Limited | Arts & recreation | 2010 |
| Calvert Enterprises Limited | Financial services | 2024 |
| Calvert Sporting Limited | Education | 2016 |
| Cantina Studio Ltd | Arts & recreation | 2020 |