| 12 High Street WUE Management Company Ltd | Households | 2021 |
| 14 Ryecroft Ltd | Households | 2024 |
| 1711 Properties Limited | Real estate | 2025 |
| 32 Hampton Road Management Company Limited | Households | 1990 |
| 3D Projects (UK) Limited | Professional & scientific | 2009 |
| 4 Engineering Limited | Construction | 2014 |
| 9 Trees Building Company Ltd | Construction | 2025 |
| 99 Greyhound Road Limited | Households | 2017 |
| A & S Machine Sales Limited | Construction | 2024 |
| A B W Engineering Services (South West) Ltd | Manufacturing | 2009 |
| A.C. Airconditioning Limited | Extraterritorial | 1982 |
| A.E. Wilcox & SON Limited | Wholesale & retail | 1950 |
| Access Engineering Services Limited | Professional & scientific | 2008 |
| Accounting Locally Limited | Professional & scientific | 2022 |
| Acuity Secretarial Services Ltd | Administrative & support | 2026 |
| Added Value Learning Limited | Information & communication | 2002 |
| Addt Services Ltd | Transport & logistics | 2026 |
| Adrian Pearce Baker Ltd | Professional & scientific | 2016 |
| Aerospark Consultants Ltd | Professional & scientific | 2025 |
| Airport Consultants and Resourcing Ltd | Professional & scientific | 2022 |
| Alderley Process Technologies Limited | Manufacturing | 1992 |
| ALI & Sarwat Ltd | Health & social care | 2010 |
| Allmet Construction Limited | Hospitality | 2000 |
| Allycat Concierge Ltd | Agriculture & fishing | 2025 |
| Alternative Achievement Tuition Ltd | Education | 2025 |
| Amadeus Chorus and Orchestra | Arts & recreation | 1998 |
| Amberley Aesthetics Limited | Health & social care | 2025 |
| Amgf Limited | Agriculture & fishing | 2020 |
| Amin Neurology Limited | Health & social care | 2018 |
| Amoreautos Limited | Wholesale & retail | 2017 |
| AMP Ie&Cc Ltd | Health & social care | 2014 |
| AMY Kent Rugs Limited | Wholesale & retail | 2024 |
| Ancrum Group Limited | Construction | 2022 |
| Andrew Construction Cornwall (ACC) Limited | Construction | 2026 |
| Archway Electrical Limited | Construction | 2001 |
| Arkells Court Management Company Limited | Households | 1998 |
| Armstrong Carpentry and Joinery Ltd | Construction | 2008 |
| Arnold Court Freehold Ltd | Real estate | 2016 |
| ARP Roofing Limited | Construction | 2011 |
| Arthur Cameron Ltd | Wholesale & retail | 2011 |
| Artisan Dental Studio Ltd | Health & social care | 2017 |
| Aseco Electrical Services Limited | Construction | 2016 |
| ASI Group Limited | Manufacturing | 2017 |
| Aspect Construction SW Ltd | Construction | 2022 |
| Aspire Dressage LLP | | 2007 |
| Assessimus Phoenixtm Limited | Financial services | 2025 |
| Assessimus UK Technology Solutions Ltd | Financial services | 2023 |
| Audacious Holdings Ltd | Real estate | 2025 |
| Audacious Property Ltd | Real estate | 2025 |
| Audeez Ltd | Information & communication | 2020 |
| Auricwholesale Ltd | Wholesale & retail | 2024 |
| Austin-Young Group Ltd | Real estate | 2017 |
| Autos Direct Ltd | Wholesale & retail | 2014 |
| Avac Properties Limited | Real estate | 2015 |
| Avon Air Tools Limited | Manufacturing | 2006 |
| Avonshire Plant Limited | Real estate | 1971 |
| Avonshire Vehicle Repairs Ltd | Wholesale & retail | 2010 |
| Awgs Services Limited | Construction | 2025 |
| Axion Associates Ltd | Information & communication | 2007 |
| AZ Painting and Decorating Ltd | Construction | 2025 |
| B & W Consultants Ltd | Professional & scientific | 2002 |
| Baber Consulting Limited | Professional & scientific | 2003 |
| Bains Fryer Limited | Hospitality | 2000 |
| Balla Estates Limited | Construction | 2019 |
| Balla Group Ltd | Real estate | 2023 |
| Balla Lorry Park (Avonmouth) Ltd | Construction | 2022 |
| Balmoral Sameday Couriers Limited | Transport & logistics | 2008 |
| Barmersland Developments Limited | Construction | 2024 |
| Bats Research & Training Limited | Education | 2018 |
| Bbulliesuk Ltd | Wholesale & retail | 2021 |
| Bcts Properties Ltd | Real estate | 2024 |
| Beaujais Limited | Manufacturing | 2010 |
| Beaumont Square Residents Limited | Households | 2003 |
| Bees Abroad | Professional & scientific | 2005 |
| Berkeley Energy Systems Ltd | Extraterritorial | 2022 |
| Berkeley Sportscars Ltd | Extraterritorial | 2017 |
| Best of British Home and Outdoors Limited | Wholesale & retail | 2021 |
| Bewnam Limited | Extraterritorial | 2016 |
| Beyond-It Solutions Ltd | Information & communication | 2001 |
| Big Soul Brands Ltd | Professional & scientific | 2026 |
| BIOV8TION Limited | Professional & scientific | 2010 |
| BIT of This BIT of That Ltd | Wholesale & retail | 2025 |
| Bkcs Groundworks and Construction Ltd | Construction | 2026 |
| Bluechip Business Support Limited | Administrative & support | 2008 |
| Bluetek Solutions Limited | Information & communication | 2008 |
| Bnhd Building Ltd | Construction | 2024 |
| Bode Properties Limited | Real estate | 2022 |
| Boulton Developments Limited | Real estate | 2000 |
| Bournstream Consultancy Limited | Professional & scientific | 2024 |
| Boyles Estates Ltd | Real estate | 2018 |
| Bradley Street Management Company Limited | Households | 2022 |
| Brakefield (South) LLP | | 2015 |
| Bramley Flats Management (Kingswood) Limited | Households | 1992 |
| Brand New Day Limited | Other services | 1997 |
| Briars Consulting Ltd | Professional & scientific | 2025 |
| Brighttalk (Bristol) Ltd | Information & communication | 2015 |
| Brighttalk (Wiltshire) Ltd | Information & communication | 2015 |
| Bristol GAS Training Ltd | Education | 2019 |
| Brizzlejigg Limited | Real estate | 2026 |
| Broadwater Group Ltd | Extraterritorial | 2015 |