| Atlas Survey & Building Services Limited | Construction | 2003 |
| Atoll Limited | Professional & scientific | 2007 |
| Audio Productions (UK) Limited | Administrative & support | 2002 |
| Audley Street Management Ltd | Real estate | 2000 |
| Aurora Telecommunications Limited | Administrative & support | 1999 |
| Autoden (Knutsford) Limited | Wholesale & retail | 1996 |
| Autoden at Station Garage Limited | Wholesale & retail | 2024 |
| Autolock Limited | Wholesale & retail | 1978 |
| Automation Applications Ltd | Manufacturing | 2007 |
| Autosafe 2000 Limited | Manufacturing | 2002 |
| Auxo Digital Ltd | Professional & scientific | 2023 |
| Avatar Music Limited | Wholesale & retail | 2004 |
| Aviian Limited | Information & communication | 2002 |
| Avis Audio Visual Limited | Construction | 2006 |
| Avmed Ltd. | Health & social care | 1997 |
| Avro Holdings Limited | Construction | 2021 |
| Award Signs and Business Gifts Limited | Other services | 2006 |
| Axioni Limited | Administrative & support | 2006 |
| Azoria Capital (5) Limited | Financial services | 2024 |
| Aztec Adhesives Limited | Wholesale & retail | 1987 |
| Aztec Imports, Inc. (UK) Limited | Wholesale & retail | 1993 |
| B & a Cosgrove Limited | Arts & recreation | 1999 |
| B & D Joinery Limited | Construction | 2003 |
| B & J Swindells Fireplaces Ltd | Wholesale & retail | 2003 |
| B J Carpets Ltd | Wholesale & retail | 2005 |
| B M Loughlin & Sons | | 2000 |
| B&G Solutions Limited | Information & communication | 2004 |
| B. & J. Swindells (Masonry) Limited | Construction | 1978 |
| B. J. Hibbert Plumbing and Heating Limited | Construction | 2007 |
| B.J. Snape Limited | Health & social care | 2002 |
| B.N. Sykes Business & Personal Taxation Ltd | Professional & scientific | 2002 |
| B.S.David & SON Limited | Real estate | 1963 |
| B1 Haulage Limited | Transport & logistics | 2005 |
| Baban Supermarket Limited | Wholesale & retail | 2019 |
| Babbage Technologies Limited | Information & communication | 2001 |
| Bailey Landscapes Limited | Administrative & support | 2006 |
| Bairn (UK) Limited | Real estate | 1983 |
| Balanced Perspectives Limited | Professional & scientific | 2006 |
| Balde Hotels Limited | Extraterritorial | 2004 |
| Bangladesh Medical Association in the U.K. Limited | Professional & scientific | 1985 |
| Bannerman Services Limited | Construction | 2005 |
| Banyan Tree Answers Ltd | Other services | 2013 |
| Barker's Florists Limited | Wholesale & retail | 2002 |
| Barlow Wood Ltd | Administrative & support | 2001 |
| Barlows Boilers Limited | | 1985 |
| Barlows Welding & Boiler Services Limited | | 1964 |
| Barnes Holdings Limited | Households | 2005 |
| Barnett Jones & Cooke Limited | Financial services | 1999 |
| Barrymore Gymnasium Limited | Arts & recreation | 2007 |
| Basic Monkey Limited | Administrative & support | 2006 |
| Batesons Management Services Limited | Professional & scientific | 2002 |
| Batur Global Ltd | Wholesale & retail | 2025 |
| Bauer Compressors Limited | Professional & scientific | 1998 |
| Bauer Compressors UK Limited | Professional & scientific | 1998 |
| Baygaze Limited | Professional & scientific | 2000 |
| BBM Afghan Warrington Ltd | Wholesale & retail | 2025 |
| BDB Global Limited | Professional & scientific | 1991 |
| Bdic (2004 to 2014) Ltd | Real estate | 2004 |
| Beanstalks Childcare Ltd | Health & social care | 2007 |
| Beaumont Organic Limited | Wholesale & retail | 2009 |
| Beaumonts (Manchester) Limited | | 1923 |
| Beauty Factors Limited | Other services | 1996 |
| Beauty Works (Cheshire) Limited | Other services | 2001 |
| Bebbington Properties Limited | Real estate | 2003 |
| Belamente International Limited | Extraterritorial | 2007 |
| Bell & Co Limited | Extraterritorial | 1898 |
| Bell Technology (Cheshire) Limited | Information & communication | 1996 |
| Belle Solutions Limited | Professional & scientific | 1992 |
| Bellissima (Cheshire) Limited | Wholesale & retail | 2004 |
| Bellissima One Limited | Other services | 2004 |
| Belmont Fabrications (Congleton) LLP | | 2003 |
| Belong (Construction) Limited | Construction | 2006 |
| Bentley Motors Limited | Manufacturing | 1970 |
| Bequia Estates Ltd | Real estate | 2019 |
| Berkeley (UK) Limited | Wholesale & retail | 2006 |
| Berwin Group Limited | Professional & scientific | 1983 |
| Bespak HC Limited | Manufacturing | 2018 |
| Besseges FM Limited | Other services | 2022 |
| Besseges Holdings Limited | Professional & scientific | 2022 |
| Besseges Limited | Other services | 1976 |
| Best Construction Limited | Construction | 1988 |
| Best MAN Ltd | Wholesale & retail | 2004 |
| Beswick Inspection Services (B.I.S) Limited | Professional & scientific | 2003 |
| Betterlease Limited | Extraterritorial | 1992 |
| Bexley Property Developments Limited | Real estate | 2001 |
| BG Consulting Services Limited | Administrative & support | 2020 |
| Bibipristine Fragrance Ltd | Wholesale & retail | 2025 |
| Bill Smith Motors (Liverpool) Limited | Extraterritorial | 1988 |
| Billingham Joinery Limited | Construction | 2006 |
| Bilway Limited | Other services | 1993 |
| Binarynine Ltd | Information & communication | 2001 |
| Bio-Act Chemicals Limited | Professional & scientific | 1985 |
| Biodiversite Couleurs Europe Limited | Wholesale & retail | 2025 |
| Birchfilm Limited | | 1980 |
| Birdwave Consultancy Limited | Arts & recreation | 2004 |
| Birmingham Bottle Co. Limited | | 1984 |
| Bishopdale Services Limited | Information & communication | 2007 |
| Biztech Consulting Ltd | Information & communication | 2016 |
| Bizzy Sparks Limited | Other services | 2002 |
| Bizzybods Limited | Wholesale & retail | 2005 |