| AWD Training Limited | Education | 2014 |
| AWL Design Limited | Professional & scientific | 2013 |
| AWM Scaffolding Ltd | Construction | 2026 |
| Aworx Commercial Maintenance Limited | Administrative & support | 2018 |
| AWU Electrical & Security Limited | Construction | 2015 |
| Awwal Projects (UK) Limited | Wholesale & retail | 2016 |
| AX Commercial Limited | Real estate | 2025 |
| AX Delivery Ltd | Administrative & support | 2017 |
| Axecess Limited | Transport & logistics | 2025 |
| Axia GIS Ltd | Real estate | 2026 |
| Axiametrics Consulting Limited | Information & communication | 2019 |
| Axiametrics LLP | | 2009 |
| Axiiotek Ltd | Other services | 2018 |
| Axion Marketing Limited | Information & communication | 2022 |
| Axis Imports Limited | Wholesale & retail | 2026 |
| Axogroup Limited | Wholesale & retail | 2019 |
| Axon Consult Ltd | Professional & scientific | 2021 |
| Axsim Limited | Professional & scientific | 2021 |
| Ayat Imran Trading Ltd | Wholesale & retail | 2024 |
| Ayir Limited | Hospitality | 2015 |
| Ayles Property Ltd | Real estate | 2026 |
| Aylett Studio Limited | Professional & scientific | 2024 |
| Aymsk Limited | Wholesale & retail | 2021 |
| Ayrey Fitness Limited | Arts & recreation | 2012 |
| Ayrosoft Limited | Professional & scientific | 2023 |
| Aytan Logistics Limited | Transport & logistics | 2025 |
| Ayuelements Limited | Manufacturing | 2025 |
| Ayyo Ltd | Information & communication | 2025 |
| AYZ Mobile Catering Ltd | Hospitality | 2025 |
| Ayzara Trading Company Ltd | Information & communication | 2026 |
| AZ Car Body Repair Ltd | Wholesale & retail | 2026 |
| AZ Distribution Limited | Administrative & support | 2016 |
| AZ Syed & Co Limited | Administrative & support | 2016 |
| Azad Euro Halal Ltd | Wholesale & retail | 2021 |
| Azan Home Care Limited | Health & social care | 2023 |
| Azan Medics Limited | Health & social care | 2024 |
| Azom Medics Ltd | Health & social care | 2025 |
| Azom Motor Group Ltd | Wholesale & retail | 2022 |
| Aztech Refurbishments Ltd | Other services | 2008 |
| Azymus Wellness Ltd | Manufacturing | 2026 |
| Azymusuk Limited | Wholesale & retail | 2025 |
| B & HF Consulting Limited | Information & communication | 2010 |
| B & L Global Limited | Information & communication | 2025 |
| B & S DRY Lining Limited | Construction | 1995 |
| B & W Building Services Ltd | Construction | 2012 |
| B & W Skips Ltd | Water & waste | 2026 |
| B & W Waste Management Services Limited | Water & waste | 1994 |
| B + T Tyre & Exhaust Centre Limited | Wholesale & retail | 1981 |
| B B a K Control Panels Limited | Manufacturing | 1998 |
| B B Distribution London Ltd | Transport & logistics | 2025 |
| B Catalyst Ltd | Professional & scientific | 2022 |
| B Delicious Ltd | Manufacturing | 2025 |
| B E Associates Limited | Information & communication | 1995 |
| B Express Food Center Ltd | Wholesale & retail | 2026 |
| B Hymus Contracting Ltd | Professional & scientific | 2024 |
| B Kent Electrical Limited | Construction | 2011 |
| B Positive CIC | Health & social care | 2024 |
| B R Mcelroy Limited | Health & social care | 2010 |
| B S Bell Construction Limited | Construction | 2016 |
| B S M Windows Limited | Construction | 2007 |
| B Triple D Properties Limited | Real estate | 2025 |
| B W T Amusements Ltd | Arts & recreation | 2017 |
| B Wallace Services Limited | Other services | 2023 |
| B Wright Safety Solutions Ltd | Construction | 2025 |
| B&M Worx Limited | Wholesale & retail | 2010 |
| B&R Pubs Limited | Hospitality | 2016 |
| B&S (Bedford) Limited | Wholesale & retail | 2025 |
| B&S Painting & Decorating Ltd | Construction | 2019 |
| B-First Fire Safety Ltd | Professional & scientific | 2021 |
| B-Stix Limited | Wholesale & retail | 2015 |
| B-Weld Engineering Ltd | Professional & scientific | 2024 |
| B. Wells Plumbing and Heating Ltd | Construction | 2006 |
| B.A. Clarke Builder (Bedfordshire) Limited | | 1975 |
| B.B. Jewellery Ltd | Wholesale & retail | 2021 |
| B.E.D. Electrical Distributors Limited | Wholesale & retail | 1999 |
| B.F. Endeavours Ltd | Construction | 2017 |
| B.J. Shopfitting Limited | Wholesale & retail | 1979 |
| B.J. Waller Limited | Wholesale & retail | 1982 |
| B.J.Hodgson Limited | Information & communication | 1959 |
| B.R.Dutton Limited | Administrative & support | 2009 |
| B.Spoketraining Limited | Education | 2001 |
| B1 Civils Ltd | Construction | 2021 |
| B1 Courier Ltd | Transport & logistics | 2025 |
| B2B Interim Services Limited | Information & communication | 1999 |
| B2B Services Limited | Information & communication | 1999 |
| B2BE Different Limited | Professional & scientific | 2023 |
| BA Digital Hub Ltd | Information & communication | 2017 |
| BAB Accounting Ltd | Professional & scientific | 2023 |
| BAB Group Holdings Limited | Financial services | 2025 |
| Babel Automobile Ltd | Wholesale & retail | 2025 |
| Baby Bears Child Care Limited | Health & social care | 2023 |
| Baby Bears Day Care Limited | Administrative & support | 2010 |
| Baby Blue IT & Consulting Ltd | Wholesale & retail | 2009 |
| BAC Environmental Health Limited | Professional & scientific | 2014 |
| BAC International Ltd | Other services | 2025 |
| Bach Hygienist Care Ltd | Health & social care | 2026 |
| Bach Music Limited | Information & communication | 2018 |
| Backbenchers Ltd | Wholesale & retail | 2022 |
| Backfire Development Ltd | Information & communication | 2019 |
| BAD Boys Security UK Ltd | Administrative & support | 2019 |