| Awkward Turtle Design Ltd | Administrative & support | 2011 |
| AWS Advisory Services Limited | Professional & scientific | 2026 |
| Axen Management LLP | | 2012 |
| Axford Trading Co. Ltd | Wholesale & retail | 2023 |
| Axiom Property Holdings Limited | Real estate | 2022 |
| Axior Marketing Ltd | Administrative & support | 2026 |
| Axis Ecommerce Ltd | Wholesale & retail | 2024 |
| Aydinsway Limited | Hospitality | 2026 |
| Aylesham Tyre Centre Ltd | Manufacturing | 2025 |
| AYS Sales Limited | Wholesale & retail | 2017 |
| Ayurvita Nutrition Ltd | Wholesale & retail | 2018 |
| Ayva Sport Ltd | Other services | 2017 |
| AZ Caring Services Ltd | Health & social care | 2017 |
| Azim Property Ltd | Real estate | 2018 |
| Aztec Commercial Window Cleaning Limited | Administrative & support | 2024 |
| Aztec London Ltd | Manufacturing | 2020 |
| Aztec Property Maintenance Ltd | Construction | 2024 |
| Azuh Limited | Health & social care | 2019 |
| Azure Paradigm Limited | Professional & scientific | 2024 |
| Azure Partners Limited | Financial services | 2026 |
| Azurite Services Ltd | Administrative & support | 2022 |
| B Street Catering Ltd | Hospitality | 2024 |
| B & E Grab Services Limited | Water & waste | 2012 |
| B & H Construction (Kent) Limited | Construction | 2020 |
| B & H Property Restoration Limited | Construction | 2026 |
| B & S Associates Kent Ltd | Professional & scientific | 2020 |
| B & S Lettings and Property Management Ltd | Real estate | 2024 |
| B and H Plant Division Ltd | Administrative & support | 2022 |
| B B Stamps Limited | Professional & scientific | 2002 |
| B C P Solar Limited | Construction | 2025 |
| B Clark & Sons Contractors Ltd | Construction | 2022 |
| B E S Rigging Services Ltd | Information & communication | 2017 |
| B James Building Limited | Construction | 2016 |
| B Keogh Construction Limited | Extraterritorial | 2014 |
| B King Roofing & Leadwork Ltd | Construction | 2019 |
| B Lockyer Housing Ltd | Real estate | 2025 |
| B Pullinger Paint Finishes Ltd | Construction | 2021 |
| B Road Hunting Club Limited | Wholesale & retail | 2018 |
| B S Woodcraft Electrical Contractor Ltd | Construction | 2026 |
| B Screeded Ltd | Construction | 2016 |
| B Spicer Communications Ltd | Information & communication | 2019 |
| B W P Estates Ltd | Real estate | 2015 |
| B&B Development & Investment Ltd | Real estate | 2021 |
| B&B Fitness (C) Ltd | Arts & recreation | 2024 |
| B&B Fitness Ltd | Arts & recreation | 2023 |
| B&C Ashford Limited | Wholesale & retail | 2026 |
| B&H Grab Services Limited | Water & waste | 2026 |
| B&J Building Services Limited | Construction | 2015 |
| B&K Leisure Ltd | Hospitality | 2020 |
| B. a. Compliance Limited | Administrative & support | 2009 |
| B. Ball Contractors Limited | Water & waste | 2002 |
| B.E.C. Homes Limited | Construction | 2005 |
| B.S.Leadwork Limited | Construction | 2014 |
| B2B Debt Recovery Limited | Administrative & support | 2025 |
| B2BEDIA Limited | Professional & scientific | 2025 |
| B4 Accountancy Ltd | Professional & scientific | 2019 |
| B68 Solutions Limited | Wholesale & retail | 2009 |
| BA Legal Referrals Limited | Administrative & support | 2023 |
| Babs Signature Limited | Hospitality | 2024 |
| Baburchi Diner Ltd | Hospitality | 2019 |
| Baby Art Studio (Kent) Ltd | Professional & scientific | 2003 |
| Babyseashells Ltd | Health & social care | 2018 |
| Babytens Limited | Wholesale & retail | 2013 |
| Back to Wellness Chiropractic Limited | Health & social care | 2011 |
| Backstage Event Logistics Ltd | Transport & logistics | 2024 |
| Backstreet Motors Limited | Wholesale & retail | 2026 |
| BAD BOY Developments Ltd | Construction | 2019 |
| Bado & KAY Limited | Real estate | 2023 |
| Bagley Charterhouse Limited | Real estate | 2006 |
| Bagley Holdings Limited | Construction | 1970 |
| Bagley Plastering Contractors Limited | Construction | 1984 |
| Bagshaw Properties Ltd | Real estate | 2025 |
| Bagshots Limited | Arts & recreation | 1993 |
| Bahia Industries Limited | Financial services | 2019 |
| Bahik Property Ltd | Real estate | 2025 |
| Baileys Bookkeeping Services LH Ltd | Professional & scientific | 2023 |
| Baileys Wastepaper Limited | Water & waste | 2013 |
| Baird and Brown Ltd | Construction | 2017 |
| Baker Coatings Limited | Manufacturing | 2010 |
| Baker Contractors Limited | | 1996 |
| Bakerly Ltd | Manufacturing | 2025 |
| Bakers Dozen Caribbean Roots Ltd | Hospitality | 2018 |
| Balam Properties Ltd | Real estate | 2017 |
| Balavani Limited | Professional & scientific | 2025 |
| Baldrock Limited | Real estate | 2019 |
| Balkar Singh Padda Ltd | Construction | 2016 |
| Ball & Co Property Group Ltd | Financial services | 2026 |
| Ball Consultancy Limited | Professional & scientific | 2017 |
| Ballentine Driver Training Limited | Administrative & support | 2019 |
| Ballistic Measurements Ltd | Professional & scientific | 2008 |
| Ballistick Ltd | Information & communication | 2026 |
| Balloon Flights Limited | Arts & recreation | 2023 |
| Ballpark Plumbing & Heating Services Ltd | Construction | 2008 |
| Baltic and Albion Maritime Limited | Education | 2018 |
| Banana Bear Ltd | Arts & recreation | 2013 |
| Banbury Group Limited | Financial services | 2016 |
| Bandco Systems Limited | Information & communication | 2025 |
| Banerjee Property Rentals Limited | Real estate | 2022 |
| Bangham & Scratchett of London Limited | Manufacturing | 2018 |
| Bannor Signature International Ltd | Wholesale & retail | 2023 |