| Blue Tungsten Consulting Limited | Professional & scientific | 2016 |
| BOA Designs LLP | | 2012 |
| BOA Kitchen Limited | Hospitality | 2022 |
| Boat Group Ltd | Hospitality | 2021 |
| Boat Studios Limited | Information & communication | 2015 |
| Bodkin Design Ltd | Professional & scientific | 2019 |
| BON Choix Ltd | Transport & logistics | 2021 |
| Bonsai Building & Developments Ltd | Manufacturing | 2024 |
| Books Your Way Limited | Professional & scientific | 2024 |
| Booths Construction & Maintenance Ltd | Construction | 2020 |
| Bounce-A-Roo Bouncy Castle Hire Limited | Administrative & support | 2017 |
| Bourton Mill Limited | Households | 2017 |
| Box Psychology Ltd | Education | 2018 |
| Bracebridge Property Ltd | Real estate | 2021 |
| Bracknell Swimarium Limited | Arts & recreation | 2013 |
| Bradford Court Management Limited | Households | 1988 |
| Bradford on Avon Museum Society | Arts & recreation | 1987 |
| Bradford Town Football Club Limited | Arts & recreation | 2022 |
| Bradley's Coffee House Limited | Hospitality | 2026 |
| Brave APE Limited | Wholesale & retail | 2019 |
| Bre-Gen One Limited | Construction | 2017 |
| Breathe Shift Ltd | Wholesale & retail | 2025 |
| Bright Imports Limited | Wholesale & retail | 2003 |
| Brightside Healthcare Solutions Limited | Administrative & support | 2018 |
| Briken Motors Limited | Wholesale & retail | 2018 |
| Brite Advisors Limited | Financial services | 2019 |
| Britton LE Bihan Ltd | Professional & scientific | 2002 |
| BRO & Co Holdings Ltd | Wholesale & retail | 2025 |
| Broadmead Greenspace CIC | Real estate | 2025 |
| Broken Pixel Limited | Information & communication | 2014 |
| Brook House Talent Ltd | Professional & scientific | 2020 |
| BRS Property Services Ltd | Construction | 2020 |
| Bsquare Emea Limited | Professional & scientific | 2005 |
| BTL IT Solutions Ltd | Information & communication | 2011 |
| Budbury Packaging Ltd | Administrative & support | 2020 |
| Buildsafe Construction Design & Build Ltd | Construction | 2022 |
| Bun&Run Bath City Ltd | Hospitality | 2026 |
| Burge Developments Ltd | Real estate | 2025 |
| Burge Electrical Ltd | Construction | 2020 |
| Business IS Booming Limited | Information & communication | 2012 |
| Business Women in Limited | Professional & scientific | 2020 |
| Butler Mortgages Limited | Financial services | 2003 |
| Buttons Yard Management Company Limited | Households | 1988 |
| BY Michelle Limited | Other services | 2026 |
| BYD Ltd | Construction | 1995 |
| C & H Agency Limited | Administrative & support | 2005 |
| C & S Energee Ltd | Manufacturing | 2007 |
| C B Real Estate Ltd | Administrative & support | 2010 |
| C J Residential Ltd. | Real estate | 2004 |
| C L S Upholstery Services Limited | Manufacturing | 2021 |
| C M Willcox Limited | Construction | 2003 |
| C P Building Contractors Limited | Construction | 2007 |
| C Williams Electrical Ltd | Construction | 2026 |
| C&M Catering Ltd | Hospitality | 2025 |
| C&S Makenston Special Care Services Limited | Health & social care | 2021 |
| C.J Coffee Limited | Hospitality | 2025 |
| Cabin of Curiosities Ltd | Hospitality | 2025 |
| Cabot Building Developments Limited | Construction | 2024 |
| Calliandra Productions Limited | Arts & recreation | 1995 |
| Canapeshka Ltd | Manufacturing | 2025 |
| Canary Apparels Ltd | Wholesale & retail | 2020 |
| Cani UN Limited | Agriculture & fishing | 2016 |
| Capital Bros Ltd | Administrative & support | 2025 |
| Capones Barbers Limited | Other services | 2012 |
| Car AID Ltd | Wholesale & retail | 2021 |
| Care Needs at Home Limited | Health & social care | 2025 |
| Carer Support Wiltshire | Health & social care | 2002 |
| Caring Partners Healthcare Ltd | Public administration | 2020 |
| Caritas Support Ltd | Health & social care | 2023 |
| Carpentryworx Ltd | Construction | 2022 |
| Carpleton Limited | Construction | 2000 |
| Carver’S Events Ltd | Other services | 2021 |
| Casemate Limited | Administrative & support | 2003 |
| Casterbridge Furniture Limited | Professional & scientific | 1973 |
| Catharina Davies Services Limited | Professional & scientific | 2018 |
| Cause & Event Ltd | Hospitality | 2026 |
| Causeway Garage Wiltshire Limited | Extraterritorial | 1991 |
| Cave Martial Arts Academy Ltd | Education | 2026 |
| Caxton Partners Limited | Professional & scientific | 2012 |
| CD International Ltd | Wholesale & retail | 2002 |
| Centenary Close Management Company Limited | Households | 2018 |
| Central Garage (Trowbridge) Limited(The) | Real estate | 1946 |
| Ceroc Events Ltd | Arts & recreation | 2021 |
| Ceroc Live Wiltshire Ltd | Administrative & support | 2018 |
| Chain Impact Ltd | Information & communication | 2025 |
| Challenge Tyre, Exhaust & MOT Centre Limited | Wholesale & retail | 2006 |
| Challenger Private Property Ltd | Hospitality | 2019 |
| Chaly Trading Ltd | Wholesale & retail | 2019 |
| Champion Youth Ltd | Education | 2025 |
| Change Motorsport Ltd | Transport & logistics | 2024 |
| Chapel Process Management Ltd | Professional & scientific | 2017 |
| Chapter Estates Limited | Construction | 1997 |
| Charkitecture Ltd | Professional & scientific | 2019 |
| Charlie Holton Mortgage Solutions Ltd | Financial services | 2021 |
| Charlotte Langley Interior Designs Limited | Professional & scientific | 2015 |
| Charlton Baker (Trowbridge) Limited | Professional & scientific | 2003 |
| Charters Developments Ltd | Construction | 2026 |
| Checkpoint Warminster Limited | Wholesale & retail | 2016 |
| Chedburn Limited | Professional & scientific | 1998 |
| Chef SAM Limited | Hospitality | 2017 |