| Angel Accounting Limited | Professional & scientific | 2007 |
| Angel Accounts Limited | Professional & scientific | 2018 |
| Angel Asset Protection Limited | Professional & scientific | 2014 |
| ANGELL1 Limited | Hospitality | 2019 |
| Anizen Limited | Professional & scientific | 2025 |
| Annabel Sarah Bridal Ltd | Wholesale & retail | 2021 |
| Annie's Market Garden Ltd | Agriculture & fishing | 2023 |
| Antrain Limited | Extraterritorial | 2025 |
| APA Contract Flooring Limited | Construction | 2014 |
| APA Property Management Limited | Real estate | 2023 |
| Apex Agtech Limited | Wholesale & retail | 2023 |
| Apex Build Solutions Midlands Limited | Real estate | 2019 |
| Apex Plant Training Limited | Education | 2018 |
| Apple Office Solutions (UK) Limited | Extraterritorial | 2011 |
| Appletreewick Interiors LLP | | 2024 |
| APR Construction Limited | Construction | 2011 |
| Apss Limited | Administrative & support | 1990 |
| Aqua Mundus (Holdings) Ltd | Real estate | 2020 |
| Aquamode Ltd | Administrative & support | 2019 |
| Aquavent Environmental Services Limited | Administrative & support | 1999 |
| Arcovian (Holdings) Ltd | Financial services | 2026 |
| Arcovian Ltd | Extraterritorial | 2026 |
| Arden Cafe Limited | Hospitality | 2017 |
| Arden Care Stratford Limited | Other services | 2022 |
| Arden Carpets and Flooring Ltd | Wholesale & retail | 2024 |
| Arden Construction Limited | Construction | 1992 |
| Arden Court Limited | Professional & scientific | 2017 |
| Arden Forest C of E Multi Academy Trust | Education | 2012 |
| Arden Forest Developments Limited | Real estate | 2014 |
| Arden Forest Group Ltd | Extraterritorial | 2022 |
| Arden Forest Joinery Ltd | Manufacturing | 2021 |
| Arden Forest Kitchens Ltd | Manufacturing | 2021 |
| Arden Forest Property Limited | Real estate | 2021 |
| Arden Homes Solihull Limited | Construction | 2015 |
| Arden Medical Limited | Manufacturing | 1996 |
| Arden Motorcycles Limited | Wholesale & retail | 2005 |
| Arden Personnel Limited | Administrative & support | 2012 |
| Arden Surveyors Limited | Professional & scientific | 2020 |
| Arden Wines Limited | Hospitality | 2015 |
| Ardencote Consulting Limited | Professional & scientific | 2025 |
| Ardencroft Estates Limited | Real estate | 1998 |
| Aretex Supply Chain Solutions Limited | Professional & scientific | 2025 |
| Arishima Ltd | Transport & logistics | 2022 |
| ARM Engineering Limited | Wholesale & retail | 2002 |
| Armstrong Collective Ltd | Information & communication | 2025 |
| Arrow Architectural Limited | Extraterritorial | 1995 |
| Arrusley Ltd | Administrative & support | 2019 |
| Artel Rubber Company Limited | Manufacturing | 2008 |
| Artel Rubber Holdings Limited | Manufacturing | 2006 |
| Artem Properties Limited | Real estate | 2021 |
| Artemis Executive Consulting Limited | Administrative & support | 2015 |
| Artemis Solutions Group Limited | Professional & scientific | 2010 |
| Asgard Marketing Limited | Other services | 2011 |
| Ashley Engineering (Lancashire) Limited | Manufacturing | 1984 |
| Asky Ltd | Hospitality | 2019 |
| Aspen Fields (Little Kineton) Management Company Limited | Extraterritorial | 2020 |
| Aspley Close (Broom) Management Company Limited | Extraterritorial | 2017 |
| ASR Warwick Ltd | Households | 2017 |
| Associated Highways Surfacing Limited | Construction | 2022 |
| Assured Water Ltd | Water & waste | 2014 |
| Astaxanthin Ltd | Agriculture & fishing | 2025 |
| Aston Environmental Services Limited | Other services | 1999 |
| Astra Installations Ltd | Manufacturing | 2004 |
| Atlantic Atelier Ltd | Professional & scientific | 2023 |
| Attic Retail Limited | Other services | 2019 |
| Attic Salon Limited | Other services | 2014 |
| Attractive Partners Ltd | Other services | 2013 |
| Audio Visual Technicians (Systems) Limited | Professional & scientific | 2001 |
| Augment Reality Limited | Information & communication | 2024 |
| Austin Tovey Limited | Information & communication | 2006 |
| Auto-Assess Assessment Services Ltd | Education | 2025 |
| Auto-Assess Compliance Ltd | Education | 2022 |
| Auto-Assess Limited | Education | 2014 |
| Autolamps Limited | Wholesale & retail | 1995 |
| Autonomous Agri Group Limited | Financial services | 2023 |
| Autonomous Agri Solutions Ltd | Wholesale & retail | 2020 |
| Autoweld (UK) Limited | Professional & scientific | 1994 |
| Avalon Engineering Limited | Manufacturing | 2020 |
| Avannah Consultancy Limited | Administrative & support | 2017 |
| Avebury Therapy & Training Services Limited | Education | 2016 |
| Avenues Dating Limited | Other services | 2014 |
| Avon CNC Services Limited | Administrative & support | 2008 |
| Avon Consultancy Limited | Real estate | 2017 |
| Avon Gates and Automation Ltd | Administrative & support | 2022 |
| Avon Holiday Cottages Ltd | Hospitality | 2019 |
| Avonarrow Limited | Hospitality | 2024 |
| Azvrenic Ltd | Administrative & support | 2024 |
| B & D Chimney Sweeps Limited | Administrative & support | 2022 |
| B & D Woodburners Limited | Construction | 2015 |
| B & H Properties (Midlands) Limited | Real estate | 2024 |
| B D Gaskets & Seals Limited | Manufacturing | 2011 |
| B.D.H.T. Limited | Professional & scientific | 1930 |
| B49 Fine Dining Limited | Hospitality | 2025 |
| BAA Consulting Limited | Administrative & support | 2021 |
| Banana Property Limited | Administrative & support | 2002 |
| Bank House (Bidford on Avon) Limited | Households | 2020 |
| Bar MC Ltd | Hospitality | 2008 |
| Bard 1 Ltd | Professional & scientific | 2013 |
| Bard 2 Ltd | Professional & scientific | 2013 |
| Barmy Limited | Manufacturing | 2018 |