| Angi C Consultancy Ltd | Professional & scientific | 2025 |
| Anglesey Ladell Assoc. | Real estate | 1999 |
| Anish Enterprise Limited | Wholesale & retail | 2025 |
| Anjuros Development Ltd | Information & communication | 2025 |
| Anthor Ltd. | Information & communication | 2014 |
| Antlers (Abbots Bromley) Ltd | Hospitality | 2022 |
| Antony Bracegirdle Limited | Construction | 2010 |
| Anywaydirect Ltd | Wholesale & retail | 2025 |
| AOB Nursing Ltd | Health & social care | 2017 |
| Apex Earthworks & Civils Ltd | Construction | 2026 |
| App-K Ltd | Wholesale & retail | 2022 |
| Appsody Limited | Information & communication | 2017 |
| APS Tyres 2019 Ltd | Administrative & support | 2019 |
| Aqua Leisure Tech Ltd | Other services | 2026 |
| Aqua Smart Commercial Ltd | Administrative & support | 2022 |
| Aqua Smart Residential Ltd | Administrative & support | 2022 |
| Archive-Safe Ltd | Transport & logistics | 2023 |
| Arco Building Services Limited | Energy | 2013 |
| ARM Biosolids Ltd | Construction | 1992 |
| Armthorpe Holdings Limited | Health & social care | 1999 |
| Arnie’S Mobile Tyres Ltd | Wholesale & retail | 2026 |
| Arreta Care Limited | Health & social care | 2019 |
| Arrow Nine Trading Ltd | Wholesale & retail | 2024 |
| Arrow's, Ball's & Cues Ltd | Wholesale & retail | 2025 |
| Art-Safe Holdings Ltd | Financial services | 2023 |
| Art-Safe Ltd | Transport & logistics | 2020 |
| ASH END Contracts Ltd | Construction | 2005 |
| Ashbourne Tyre Services Limited | Wholesale & retail | 2022 |
| Ashbury Publications Limited | Information & communication | 2017 |
| Ashfield Events Limited | Other services | 2021 |
| Aspire Construction Limited | Construction | 2014 |
| Astra Belting Ltd | Manufacturing | 2006 |
| ATH Flooring Ltd | Construction | 2014 |
| Attendit.Io Ltd | Information & communication | 2021 |
| Atthire Limited | Construction | 2016 |
| Aurora Sounds Ltd | Information & communication | 2025 |
| Auto & MOT Centre Ltd | Wholesale & retail | 2018 |
| Autographic Designs Limited | Administrative & support | 2005 |
| Automotech Services Limited | Wholesale & retail | 2002 |
| Autoneering Ltd | Manufacturing | 2011 |
| Avanak Industries Ltd | Wholesale & retail | 2021 |
| Avanak Property Group Ltd | Real estate | 2025 |
| Avanco Designs Limited | Administrative & support | 2005 |
| Avanco Holdings Limited | Professional & scientific | 2009 |
| Avanco Partners LLP | | 2011 |
| Avantech Group Limited | Manufacturing | 2025 |
| Avantech Holdings Limited | Financial services | 2025 |
| Avantis Group Holdings Limited | Financial services | 2025 |
| Avantis Hardware Ltd | Manufacturing | 2008 |
| Avantis Holdings Limited | Manufacturing | 2021 |
| AVT Communication Systems Limited | Construction | 1995 |
| Aylesbury Mobility Limited | Wholesale & retail | 2020 |
| Ayurvedic Intelligence Ltd | Wholesale & retail | 2026 |
| B C & D Enterprises Ltd | Hospitality | 2016 |
| B C T Enterprises Limited | Wholesale & retail | 1996 |
| B Value Dimz Limited | Professional & scientific | 2025 |
| B.J. Dale and Company Ltd | Agriculture & fishing | 2019 |
| B2 Welding Co. Ltd | Manufacturing | 2023 |
| Baba-G Brewing Company Limited | Other services | 2023 |
| Babbington Property Developments Limited | Construction | 2024 |
| Bagots Bromley Management Company Limited | Households | 2015 |
| Bagots Court AB Ltd | Households | 2011 |
| BAL Railway Management Limited | Other services | 2010 |
| Bang on Brand Limited | Administrative & support | 2012 |
| Banner Batteries (GB) Limited | Wholesale & retail | 1997 |
| Banner Property Development Ltd | Real estate | 2025 |
| Bar NO 3 Ltd | Hospitality | 2017 |
| Baran David Ltd | Administrative & support | 2018 |
| Barnfield Solutions Ltd | Construction | 2019 |
| Barrows Bespoke Builds Ltd | Manufacturing | 2024 |
| Bates Drains Limited | Construction | 2013 |
| BAV Crushers Limited | Manufacturing | 2007 |
| Baynes-Holden Property Ltd | Real estate | 2021 |
| BBK Investments Limited | Financial services | 2008 |
| BE Bridal Ltd | Wholesale & retail | 2024 |
| Beardsmore Bathrooms Limited | Construction | 2022 |
| Beauty Lounge Laser & Skin Clinic Ltd | Other services | 2026 |
| Beauty Secrets Pro Ltd | Other services | 2017 |
| Beckart Environmental International Limited | Water & waste | 1992 |
| Beckett Management Services Limited | Construction | 2004 |
| Beechmere Technical Services Limited | Information & communication | 2011 |
| Beeteg Ltd | Professional & scientific | 2010 |
| Bell Lane Mews Management Company Limited | Real estate | 2009 |
| Bellamour HV Ltd | Professional & scientific | 2023 |
| Benchmark Building & Refurbishment Limited | Construction | 2013 |
| Benchmark Group Holdings Limited | Financial services | 2019 |
| Benchmark Property Holding Ltd | Real estate | 2019 |
| Bespoke Auctions Limited | Wholesale & retail | 2000 |
| Beta Accounting Services Limited | Professional & scientific | 2016 |
| Beth Ryan Properties Limited | Real estate | 2013 |
| Betteridge's Quality RAW Dog Food Ltd | Manufacturing | 2018 |
| Bexfield Developments Limited | Administrative & support | 2003 |
| Beynon Builds & Installs Ltd | Construction | 2019 |
| Bezzwood Ltd | Professional & scientific | 2008 |
| Big Bubbling Burners Ltd | Professional & scientific | 2025 |
| Big Green Room Ltd | Construction | 2022 |
| Big Mike Logistics Ltd | Transport & logistics | 2021 |
| Bike Life Competitions Ltd | Arts & recreation | 2024 |
| Bilash Group Rugeley Ltd | Hospitality | 2026 |
| Binary Books Ltd | Information & communication | 2015 |