| Automotive Addiction Detailing Ltd | Wholesale & retail | 2019 |
| Automotive Addiction Investments Ltd | Financial services | 2019 |
| Automotive Addiction Ltd | Wholesale & retail | 2015 |
| Avantix Travel Solutions Ltd | Transport & logistics | 2025 |
| AVC Management Limited | Real estate | 2011 |
| Averleigh Group Ltd | Wholesale & retail | 2025 |
| Avexha Technologies Limited | Information & communication | 2026 |
| Avocado Ventures Ltd | Real estate | 2016 |
| Avocet Engineering Ltd | Information & communication | 2024 |
| Axewal Ltd | Professional & scientific | 2024 |
| Axis Land & Homes Limited | Financial services | 2024 |
| Aybuk Limited | Hospitality | 2018 |
| Azzou Enterprise Limited | Hospitality | 2019 |
| B R Foss Limited | Water & waste | 2023 |
| B U Horley Limited | Hospitality | 2024 |
| B.E.S (Europe) Limited | Construction | 2000 |
| B2C Boxi Ltd | Wholesale & retail | 2022 |
| BAD Company Strength CIC | Wholesale & retail | 2026 |
| Baird & Partners Ltd | Professional & scientific | 2012 |
| Baird Consulting Limited | Professional & scientific | 2015 |
| Baird Partners Limited | Professional & scientific | 2012 |
| Baker Drive Management Company Limited | Households | 2016 |
| Bamboo Coaching and Development Ltd | Professional & scientific | 2019 |
| Barakah International Limited | Real estate | 2023 |
| Barker and Clarke Carpentry and Joinery Ltd | Construction | 2026 |
| BARTLEY32 Limited | Wholesale & retail | 2026 |
| Bartosz Brendel T/A B B Trading Ltd. | Wholesale & retail | 2012 |
| Battle Boilers Limited | Construction | 2011 |
| Bauer Security Limited | Public administration | 2009 |
| BBS Executive West Sussex Ltd | Transport & logistics | 2024 |
| BCS (Beeton Consultancy Services) Ltd | Administrative & support | 2012 |
| BD Plastering Ltd | Construction | 2025 |
| Beacon Badge Co Limited | Administrative & support | 1997 |
| Bear and Bunny Nursery Limited | Education | 2015 |
| Bearings and Belts Limited | Wholesale & retail | 2010 |
| Beautirise Limited | Wholesale & retail | 2025 |
| Beckwith Management Limited | Administrative & support | 2000 |
| BEE Connected HR Ltd | Administrative & support | 2022 |
| Behind the Easel Films Ltd | Information & communication | 2026 |
| Bela Home Care Limited | Health & social care | 2021 |
| Bellahew Properties Ltd | Real estate | 2016 |
| Belle's Boutique Ltd | Other services | 2016 |
| BEN Knight Architectural Services Ltd | Professional & scientific | 2025 |
| Beni RH6 Limited | Hospitality | 2024 |
| Bensax Educational Consult Ltd | Administrative & support | 2023 |
| Berger Enterprises Limited | Professional & scientific | 2023 |
| Berlin Commerce Ltd | Wholesale & retail | 2026 |
| Bespoke Metal Planters Limited | Manufacturing | 2024 |
| Bessie the Builder Limited | Construction | 2021 |
| Best Life Coach Ltd | Education | 2024 |
| Best Work Builder Ltd | Construction | 2020 |
| Betty Kemi Healthcare Ltd | Health & social care | 2016 |
| Bewley City Limited | Administrative & support | 2019 |
| Bewley Recruitment Limited | Administrative & support | 1993 |
| BFG IT Consulting Limited | Information & communication | 2012 |
| BG Draughting Limited | Professional & scientific | 2015 |
| BH Resources Limited | Other services | 2022 |
| Bheema Aarna Property Ltd | Real estate | 2022 |
| Biard Construction Ltd | Extraterritorial | 2024 |
| Bick Investments Limited | Real estate | 2014 |
| Big Life Properties Ltd | Real estate | 2025 |
| Bilhaf Company Ltd | Wholesale & retail | 2025 |
| Bio-Clean Equipment Sales Limited | Manufacturing | 1993 |
| Bio-Clean Limited | Manufacturing | 1997 |
| Bioregional Forestry Limited | Agriculture & fishing | 2010 |
| Birchwood Properties (South East) Limited | Real estate | 2022 |
| Biryani Beyond Ltd | Hospitality | 2026 |
| BL Adventure Ltd | Health & social care | 2020 |
| Black Horse PH Holdings Ltd | Construction | 2022 |
| Blackreef Consultancy Limited | Professional & scientific | 2016 |
| Blingshiki London Ltd | Manufacturing | 2023 |
| Blockade Demolition Limited | Water & waste | 2011 |
| Blockade Environmental Group Limited | Financial services | 2011 |
| Blockade Plant Limited | Administrative & support | 2013 |
| Bloomin Marvellous Drainage Ltd | Construction | 2026 |
| Blue Sign Creation Ltd | Arts & recreation | 2025 |
| BLUE2BLUE Ltd | Construction | 2006 |
| Bluebird Gate Management Co Ltd | Households | 2014 |
| Bluebird Tech and Investments Ltd | Information & communication | 2022 |
| Bluepace UK Limited | Information & communication | 2007 |
| Blues Taxi Bognor Ltd | Transport & logistics | 2019 |
| BM Motors London Ltd | Wholesale & retail | 2025 |
| Bmaybrey Ltd | Health & social care | 2024 |
| BMP Supermarket Limited | Wholesale & retail | 2011 |
| Born to DIE Ltd | Wholesale & retail | 2026 |
| Box (Fit OUT & Electrical) Ltd | Construction | 2019 |
| Boxclever Build Limited | Construction | 2025 |
| BR Responsible Investment Ltd | Professional & scientific | 2019 |
| Brachio Ltd | Information & communication | 2014 |
| Bradden Properties Limited | Professional & scientific | 2006 |
| Brake Group Ltd | Professional & scientific | 2025 |
| Bramblefern Properties Ltd | Construction | 2018 |
| Branches Specialist Childcare Ltd | Health & social care | 2025 |
| Bravann Limited | Administrative & support | 2025 |
| Bremner 1969 Limited | Extraterritorial | 2014 |
| Brickley Consulting Limited | Professional & scientific | 2013 |
| Brimar Villa Limited | Professional & scientific | 2017 |
| Brit Pranic Healing Counc Ltd | Wholesale & retail | 2023 |
| Britaniacrest Recycling Limited | Water & waste | 1993 |
| Britannia Homecare Ltd | Health & social care | 2002 |