| Aura Nova Holdings Ltd | Manufacturing | 2024 |
| Aurafy Ltd | Construction | 2025 |
| Auravate Ltd | Construction | 2025 |
| Aurelia Spes Limited | Information & communication | 2026 |
| Aureneum Limited | Information & communication | 2025 |
| Aureos.Ai Ltd | Information & communication | 2019 |
| Auret Consulting Limited | Professional & scientific | 2022 |
| Auret Investments Limited | Real estate | 2022 |
| Aurora Dent Limited | Health & social care | 2023 |
| Aurora Eco Products Ltd | Wholesale & retail | 2021 |
| Aurora for Good Ltd | Wholesale & retail | 2018 |
| Austin & Addison Limited | Professional & scientific | 2017 |
| Austin Clanachan Limited | Wholesale & retail | 2003 |
| Austin Consultancy (UK) Ltd | Other services | 2012 |
| Austin Electrical Services Ltd | Construction | 2022 |
| Autism Bedfordshire | Health & social care | 2003 |
| Autism Centred Care Limited | Health & social care | 2022 |
| Autism Centred Consultancy Limited | Professional & scientific | 2025 |
| Autism Hertfordshire Limited | Health & social care | 2021 |
| Autism Milton Keynes Limited | Health & social care | 2021 |
| Auto 2000 Ltd | Wholesale & retail | 2022 |
| Auto Aziza Ltd | Wholesale & retail | 2024 |
| Auto Body Paint Shop Limited | Wholesale & retail | 2025 |
| Auto Club Alliance Ltd | Wholesale & retail | 2024 |
| Auto Complex Ltd | Wholesale & retail | 2017 |
| Auto Crash Repairs.Co.Uk Limited | Real estate | 2000 |
| Auto Keys Bedford Ltd | Wholesale & retail | 2024 |
| Auto Movers Bedford Ltd | Transport & logistics | 2024 |
| Auto Prime Motors Ltd | Wholesale & retail | 2026 |
| Auto Pro Cars Ltd | Wholesale & retail | 2024 |
| Auto Select Bedford Limited | Wholesale & retail | 2016 |
| Auto Sportivo Bedford Ltd | Wholesale & retail | 2016 |
| Auto State Ltd | Wholesale & retail | 2023 |
| Autobarn Sales Ltd | Wholesale & retail | 2022 |
| Autobilia Limited | Wholesale & retail | 2000 |
| Autobots Limited | Information & communication | 2010 |
| Autobukowski Limited | Wholesale & retail | 2015 |
| Autofix Bedford Ltd | Manufacturing | 2016 |
| Autoglass Limited | Extraterritorial | 2008 |
| Autohaus of Bedford Limited | Wholesale & retail | 2025 |
| Automation for Industries Limited | Professional & scientific | 2021 |
| Automobile Specialists Ltd | Wholesale & retail | 2021 |
| Automotive HQ Ltd | Wholesale & retail | 2024 |
| Automotive Laser Polymer Welding Limited | Manufacturing | 2018 |
| Automotive Services (Eastern) Limited | Wholesale & retail | 2014 |
| Automotive Specialists Bedford Ltd | Wholesale & retail | 2025 |
| Autopars Ltd | Transport & logistics | 2019 |
| Autos Smart Repair Limited | Wholesale & retail | 2012 |
| Autosportivo Parts Ltd | Wholesale & retail | 2021 |
| Autotronix Ltd | Wholesale & retail | 2002 |
| Autoxcellence Ltd | Wholesale & retail | 2025 |
| Auxilio Systems Ltd | Information & communication | 2017 |
| AV Construction Advisory Ltd | Professional & scientific | 2024 |
| AV Genius Ltd | Other services | 2020 |
| AV Interiors Ltd | Manufacturing | 2022 |
| AV Letting Limited | Real estate | 2017 |
| AV Logistics Ltd | Transport & logistics | 2019 |
| AVA Estates Investment Ltd | Real estate | 2023 |
| AVA Sports Limited | Wholesale & retail | 2003 |
| Avalon Aero Engineering Services Limited | Manufacturing | 2019 |
| Avalon Aero Holdings Limited | Professional & scientific | 2009 |
| Avalon Aero JET Support Limited | Transport & logistics | 2009 |
| Avalon Aero Limited | Manufacturing | 2000 |
| Avalon Business Consultancy Limited | Professional & scientific | 1997 |
| Avantiaa Ltd | Professional & scientific | 2024 |
| AVB Properties Investment's Ltd | Real estate | 2026 |
| Avdit Ltd | Professional & scientific | 2025 |
| Avec Group Limited | Financial services | 2022 |
| Avec Systems Limited | Information & communication | 1997 |
| Avelar Ltd | Financial services | 2025 |
| Aventine Finds Ltd | Wholesale & retail | 2025 |
| Aventus Cars Ltd | Wholesale & retail | 2023 |
| Aventus Labour Services Limited | Construction | 2019 |
| Avenue Decorating Limited | Construction | 2007 |
| Avenue Fisheries Limited | Wholesale & retail | 2003 |
| Avenues Distribution Ltd | Transport & logistics | 2013 |
| Aves Contracting Limited | Administrative & support | 2023 |
| AVG Healthcare Ltd | Health & social care | 2015 |
| AVI Groundwork Limited | Construction | 2025 |
| Aviation Equipment Resources Rental Ltd | Administrative & support | 2019 |
| Avic Care Limited | Health & social care | 2024 |
| Avic Housing CIC | Administrative & support | 2024 |
| Avictos Ltd | Construction | 2019 |
| Avid Trade Ltd | Wholesale & retail | 2022 |
| Avila Properties Ltd | Hospitality | 2026 |
| Avls Removals Ltd | Wholesale & retail | 2022 |
| Avocado Business and Residential Ltd | Real estate | 2025 |
| Avocet Signs Limited | Administrative & support | 2018 |
| Avoko Group Holdings Ltd | Information & communication | 2017 |
| Avomonk Limited | Information & communication | 2020 |
| Avon Court (Bedford) Residents Association Limited | Households | 1966 |
| AVP Consulting Limited | Professional & scientific | 2011 |
| AVP Motors Limited | Wholesale & retail | 2019 |
| Avrora Travel and Language Services Ltd. | Transport & logistics | 2012 |
| AVS Stores Ltd | Wholesale & retail | 2015 |
| Avus Properties Ltd | Real estate | 2023 |
| AW Heating & Renovations Ltd | Construction | 2013 |
| Aw-Ac Holdings Limited | Financial services | 2025 |
| Aware Home Collection Limited | Wholesale & retail | 2021 |
| Awat Solutions Ltd | Information & communication | 2026 |