| 06208970 Limited | Professional & scientific | 2007 |
| 1 TW Properties Limited | Real estate | 2020 |
| 3SP Limited | Hospitality | 2025 |
| 46 Oak Tree Road Management Limited | Households | 2019 |
| 5HEG Limited | Professional & scientific | 2021 |
| A T Electrical & Controls (UK) Ltd | Construction | 2006 |
| A W M Consulting Solutions Limited | Professional & scientific | 2025 |
| A.B. Studios Limited | Information & communication | 1990 |
| A.H.H. Consulting Ltd | Construction | 2008 |
| AA Baits & Feeds Limited | Manufacturing | 2017 |
| ABE Rope Access Services Limited | Construction | 2015 |
| Abfs Investments Limited | Real estate | 2020 |
| Abii Lettings Ltd | Real estate | 2023 |
| Abro Balancing (UK) Ltd | Administrative & support | 2012 |
| Accomodo Living Ltd | Administrative & support | 2025 |
| Acuity Enterprises Limited | Information & communication | 2007 |
| Adapt Logistics Recruitment Ltd | Administrative & support | 2025 |
| ADC Construction Trucks Limited | Wholesale & retail | 2016 |
| Adcr Retail Ltd | Wholesale & retail | 2023 |
| Advance Construction Management Ltd | Construction | 2024 |
| Advantage I.T. Development Consultants Ltd | Information & communication | 2012 |
| Adventurer Ltd | Wholesale & retail | 2022 |
| Advio Ltd | Transport & logistics | 2022 |
| AED Adjusting Limited | Professional & scientific | 2017 |
| AED Connect Limited | Extraterritorial | 2017 |
| AED Developments Limited | Construction | 2020 |
| AED Group Holdings Limited | Financial services | 2017 |
| AED Properties (Wirral) Limited | Real estate | 2021 |
| Aegis Corporate Holdings Limited | Financial services | 2026 |
| Aegis Property, Assets & Investments Limited | Real estate | 2026 |
| Aegis Transport Compliance Limited | Professional & scientific | 2026 |
| Agri-Plant & Commercial Tyres Ltd | Wholesale & retail | 2026 |
| Aifos Group Ltd | Manufacturing | 2023 |
| Airway Solutions Limited | Construction | 1995 |
| AJJ Caravan Breaks Ltd | Hospitality | 2024 |
| AJL Psychology Limited | Health & social care | 2026 |
| AJM Properties Ltd | Real estate | 2017 |
| Akom Creative Ltd | Professional & scientific | 2015 |
| Alderley Estates Limited | Real estate | 1988 |
| Alerion UK Limited | Energy | 2022 |
| Algobots Ltd | Other services | 2019 |
| Ali's Radiology Limited | Health & social care | 2019 |
| Allclear Windows Limited | Construction | 2015 |
| Allen Automotive Group Ltd | Wholesale & retail | 2024 |
| Alles Klar Ltd | Information & communication | 2020 |
| Altimedia Ltd | Other services | 2018 |
| Amanda Aupoge Group Ltd | Wholesale & retail | 2017 |
| Amcalise Limited | Construction | 2019 |
| AMG Engineering Consultancy Ltd | Professional & scientific | 2013 |
| AML Marketing Ltd | Administrative & support | 2017 |
| AMR Medical Limited | Health & social care | 2014 |
| Ancaster Building Services Limited | Professional & scientific | 2007 |
| Anekanta Limited | Professional & scientific | 2016 |
| Annie Investments Limited | Real estate | 2020 |
| Anselmians Rugby Union Football Club Limited | Arts & recreation | 2010 |
| Apex Solar Group Ltd | Professional & scientific | 2026 |
| Apollon Construction Services Ltd | Professional & scientific | 2015 |
| Appinere Limited | Manufacturing | 2003 |
| Applegarth Engineering Limited | Manufacturing | 2006 |
| Apposing Group Limited | Professional & scientific | 2020 |
| Apposing Limited | Professional & scientific | 2010 |
| Aquasafe Swim School Limited | Extraterritorial | 2017 |
| Aquilium Limited | Administrative & support | 2012 |
| Arabella Hair Ltd | Other services | 2017 |
| Arabelle Beauty Limited | Other services | 2015 |
| Aremac Productions Limited | Administrative & support | 2013 |
| Arena Packaging Projects Limited | Professional & scientific | 2017 |
| ARJ Electrical Solutions Limited | Construction | 2017 |
| Armoured Resin Coating Ltd | Construction | 2026 |
| Arrow Plastering Ltd | Construction | 2010 |
| Arvlc Ltd | Health & social care | 2024 |
| Ascot Paving Limited | Construction | 2018 |
| Ashton House Nursery Limited | Administrative & support | 2007 |
| Asmr Legal Ltd | Education | 2020 |
| Assist Hygiene Products Ltd | Manufacturing | 2006 |
| Atholl Limited | Construction | 1995 |
| Atlantic Partners Inc Limited | Administrative & support | 2026 |
| Autobots.Ai Limited | Administrative & support | 2026 |
| Autofast & Furious Limited | Wholesale & retail | 2013 |
| Avaro Technologies Ltd | Information & communication | 2026 |
| Avid Management Ltd | Administrative & support | 2024 |
| Avio ENG Ltd | Professional & scientific | 2013 |
| AWH Electrical Limited | Energy | 2018 |
| AWP Electrical Services Limited | Construction | 2011 |
| Axion Labs Limited | Administrative & support | 2026 |
| B & K Kyffin Ltd | Professional & scientific | 2021 |
| B S Process Design Limited | Administrative & support | 2007 |
| B.R.D Tyres Ltd | Wholesale & retail | 2026 |
| Baird Maritime Ltd | Transport & logistics | 2026 |
| Baker & Baker Group Limited | Financial services | 2013 |
| Baletech Ltd | Construction | 2011 |
| Balmforth Box Company Limited | Manufacturing | 2005 |
| Bart Recruitment Limited | Administrative & support | 2026 |
| BC Events Management Ltd | Arts & recreation | 2022 |
| BE YOU OT Ltd | Health & social care | 2025 |
| Beaconrisk Health & Safety Ltd | Professional & scientific | 2009 |
| Beauty Regen Aesthetics Ltd | Other services | 2015 |
| Bebington BIM Services Limited | Administrative & support | 2026 |
| Bedford Bricks Limited | Wholesale & retail | 2019 |
| Belfry Place Management Limited | Households | 2023 |