| Avadeal Limited | Wholesale & retail | 2003 |
| Avon & Wiltshire Glass Limited | Wholesale & retail | 1989 |
| Avon Meadows (NO.2) Management Company Limited | Real estate | 1990 |
| Avonside Engine Company Limited | Transport & logistics | 1990 |
| Avonway Holdings Ltd | | 1960 |
| Axess Technologies Limited | Professional & scientific | 1999 |
| Aziz Barbers 2 Ltd | Other services | 2023 |
| B & J Jones Limited | Administrative & support | 2003 |
| B & T Cars Limited | Wholesale & retail | 2019 |
| Bailey & Woodford Ltd | Real estate | 2008 |
| Bailey BMS Limited | Information & communication | 2004 |
| Ball Aerosol Packaging UK Limited | Manufacturing | 1984 |
| Barrell Wood Associates Limited | Information & communication | 2001 |
| Bath Baroque Limited | Arts & recreation | 1995 |
| Bath Ground Rent Estate Limited | Other services | 1993 |
| BCH Camping & Leisure Limited | Wholesale & retail | 2001 |
| Beacon Software Limited | Information & communication | 1996 |
| Beckhampton Stables Limited | Agriculture & fishing | 1984 |
| Beldougie Consulting Limited | Extraterritorial | 2005 |
| Bemerton Heath PO Limited | Transport & logistics | 2012 |
| BEN Case Racing Limited | Arts & recreation | 2006 |
| BEN Thompson Events Limited | Administrative & support | 2002 |
| Berml Holdings Ltd | Financial services | 2025 |
| Berni White Limited | Manufacturing | 2003 |
| Bescott Consulting Limited | Information & communication | 2006 |
| Bettertown Residents Management Limited | Households | 1986 |
| BH Circle Projects Limited | Professional & scientific | 2007 |
| Bigoli Pictures Ltd | Information & communication | 2020 |
| BIL Group Limited | Manufacturing | 1991 |
| Binlock Limited | Wholesale & retail | 2006 |
| Bishopslaw Limited | Professional & scientific | 2007 |
| Blind & Track Service Limited | Wholesale & retail | 2006 |
| Blue Chip Worldwide Limited | Manufacturing | 2003 |
| Blue Cloud Consultancy Solutions Limited | Professional & scientific | 2018 |
| BML Builders Limited | Construction | 2017 |
| BND Electrical Ltd | Construction | 2015 |
| Boddys Limited | Other services | 2002 |
| Bonusmutual Limited | Professional & scientific | 1987 |
| Bourlet Consulting Limited | Professional & scientific | 2012 |
| Bourlet Financial Planning Limited | Financial services | 2003 |
| Bourlet Wealth Management Limited | Professional & scientific | 2007 |
| Bouverie Flats Management Limited | Real estate | 2002 |
| Bowerhill Trade Centre Limited | Wholesale & retail | 2001 |
| Box Wharf Ltd | Real estate | 2007 |
| Bradford and Winsley Community and Sports Association | Arts & recreation | 2004 |
| Brasskey Limited | Households | 1987 |
| Bratton Wholesale Meat Cutters Limited | | 1979 |
| Breeze Property Lettings Limited | Real estate | 2014 |
| Breezyway Limited | Other services | 1998 |
| Brian Bell Limited | Wholesale & retail | 2003 |
| Brimsdown Wills Limited | Professional & scientific | 2003 |
| Brinkworth Actuarial Services Limited | Professional & scientific | 2001 |
| Bristow's Carpentry & Developments Ltd | Manufacturing | 2007 |
| Brownston Homes Limited | Construction | 2006 |
| Bruce Munro Ltd | Construction | 2002 |
| Brunel Motor Services Limited | Wholesale & retail | 1999 |
| Bryan Hanlon Bronzes Limited | Manufacturing | 2007 |
| Bryants Transport Limited | Transport & logistics | 2003 |
| Bryn Mallindine Transport Limited | | 1977 |
| Business Change Consultancy Limited | Professional & scientific | 2002 |
| Business Guide Limited | Professional & scientific | 2004 |
| Business Solutions (Europe) Limited | Information & communication | 1999 |
| Busmar Limited | Real estate | 2002 |
| Byland Property Ltd | Real estate | 2026 |
| Bymacks Limited | Professional & scientific | 1965 |
| Bytelogic 2000 Limited | Real estate | 1997 |
| C & D Everden Carpentry Ltd | Construction | 2007 |
| C & R Electrical Limited | Construction | 2002 |
| C R Archer (Electrical) Limited | Construction | 2008 |
| C.A.I. Accountancy Limited | Professional & scientific | 2002 |
| Cabsoft Solutions Limited | Information & communication | 2006 |
| Calegis Ltd | Professional & scientific | 2003 |
| Call-Alert Limited | Information & communication | 2000 |
| Calne Bowls Club Ltd | Arts & recreation | 2020 |
| CAM Transport Limited | Transport & logistics | 1993 |
| Cameron Property Concern Holding Ltd | Financial services | 2024 |
| Candyhouse Limited | Wholesale & retail | 2003 |
| Cannings Hill Garage (Devizes) Limited | Administrative & support | 2005 |
| Caple Contractors Limited | Construction | 2009 |
| Car Care (Tetbury) Limited | Wholesale & retail | 2002 |
| Cardwave Limited | Extraterritorial | 2006 |
| Carey-Thomas Architecture Limited | Professional & scientific | 2007 |
| Carisma Vehicle Solutions Limited | Construction | 2004 |
| Caroline Dickenson Limited | Administrative & support | 2002 |
| Carpetwise Limited | Wholesale & retail | 1976 |
| Carter Industrial Services Limited | Administrative & support | 2002 |
| Castle Combe Circuit Limited | Arts & recreation | 1964 |
| Castle Combe Racing School Limited | Arts & recreation | 1991 |
| Castleoak Finance Limited | Professional & scientific | 2006 |
| Catleys Court Management Company Limited | Households | 2007 |
| Cavendish Upholstery Limited | Professional & scientific | 1985 |
| CD Fencing & Construction Services Limited | Construction | 1999 |
| Central Developments Limited | Wholesale & retail | 2007 |
| Central Stores Limited | Wholesale & retail | 2004 |
| Centre One Management Limited | Real estate | 1989 |
| Centre Walk Holdings Ltd | Real estate | 2019 |
| Ceramic Solutions (UK) Limited | Construction | 2003 |
| Chalke Valley Watercress Limited | Agriculture & fishing | 2001 |
| Chapel Court Management (Hungerford) Ltd | Households | 1996 |
| Chappell Associates Limited | Professional & scientific | 2008 |