| Apargl Ltd | Professional & scientific | 2010 |
| Apex Aviators Ltd | Education | 2022 |
| Apollo Management Solutions Limited | Real estate | 2018 |
| Apollodorus Ltd | Information & communication | 2019 |
| Apple Indian Restaurant Ltd | Hospitality | 2020 |
| Apply Logic Ltd | Information & communication | 2012 |
| Apsley Wall Limited | Construction | 2007 |
| Aqua Health Filters Ltd | Construction | 2024 |
| Aqua Sounds Limited | Health & social care | 2025 |
| Aquagas Energy Ltd | Construction | 2013 |
| Aquajoy Limited | Extraterritorial | 2010 |
| Aquajoy Water Gardens Limited | Construction | 1999 |
| Aquino Healthcare Limited | Health & social care | 2014 |
| ARC Music Productions International Limited | Information & communication | 1987 |
| Archers Build Limited | Construction | 2013 |
| Archie’S Pubs Limited | Hospitality | 2025 |
| Archipelago Connections Ltd | Professional & scientific | 2015 |
| Arcola AI Limited | Information & communication | 2026 |
| ARI & Co UK Ltd | Health & social care | 2025 |
| Ariadne Knowledge Works Ltd. | Information & communication | 2026 |
| Arrendale Limited | Real estate | 2014 |
| Arrow Associates UK Limited | Information & communication | 2006 |
| Art Barber Limited | Other services | 2023 |
| Arthur Redgrave Limited | Real estate | 2021 |
| Artistic Metals Limited | Manufacturing | 2016 |
| Artpro Productions Ltd | Arts & recreation | 2014 |
| Arxco | Financial services | 2024 |
| ASH Court (EG) Management Company Limited | Households | 1990 |
| ASH Mortgages Ltd | Financial services | 2019 |
| Ashbourne Park Services Limited | Professional & scientific | 2005 |
| Ashby Miles Ltd | Financial services | 2024 |
| Ashdown Business Consultants Ltd | Professional & scientific | 2017 |
| Ashdown Feeds Ltd | Wholesale & retail | 2022 |
| Ashdown Lofts Ltd | Construction | 2022 |
| Ashdown Scientific Ltd | Professional & scientific | 2026 |
| Ashdown Solar Ltd | Construction | 2022 |
| Ashdown Solutions Limited | Information & communication | 2005 |
| Ashtour Limited | Arts & recreation | 1990 |
| Ashurst Detailing Ltd | Administrative & support | 2018 |
| Ashurst Homes (Golden Green) Limited | Construction | 2019 |
| Ashurst Homes (Hunton) Limited | Construction | 2020 |
| Ashurst Homes Limited | Construction | 2019 |
| Ashurst Solutions Ltd | Information & communication | 2007 |
| Ashurst Wood Bonfire Society CIC | Administrative & support | 2022 |
| ASK Residentials Ltd | Real estate | 2022 |
| Askr Holdings Limited | Financial services | 2025 |
| Asota Media Ltd | Arts & recreation | 2025 |
| Aspen ROW Ltd | Construction | 2013 |
| Asset and Compliance Management Ltd | Professional & scientific | 2017 |
| AT This Point Limited | Wholesale & retail | 2025 |
| Athena Communications Limited | Professional & scientific | 2014 |
| Atlas Engineering Ltd | Construction | 2022 |
| Atlas Fitness Conditioning Limited | Financial services | 2019 |
| Atlas Heating Ltd | Construction | 2022 |
| Atrium Building and Landscaping Limited | Administrative & support | 2016 |
| Attrell Properties Limited | Real estate | 2019 |
| Auckland Micro Limited | Information & communication | 2004 |
| AURUM79 Accra Investment Ltd | Wholesale & retail | 2025 |
| Autoshine Alloy Wheel Refurbishment Limited | Manufacturing | 2020 |
| AVA Roofing Ltd | Construction | 2023 |
| Avalon Consulting Ltd | Financial services | 2026 |
| AVB Law Ltd | Professional & scientific | 2023 |
| Averbell Investments Limited | Real estate | 2002 |
| Averbell Limited | Information & communication | 1988 |
| Averre Consultancy Limited | Professional & scientific | 2015 |
| Aviation & Occupational Medicine Consulting Ltd | Health & social care | 2025 |
| Aviation Logistics Limited | Transport & logistics | 2001 |
| Avzgeoeng Limited | Construction | 2011 |
| AW Decorators Limited | Construction | 2007 |
| Awespower Ltd | Arts & recreation | 2024 |
| Ayura Coffee Ltd | Wholesale & retail | 2023 |
| Azimuth Insights Limited | Professional & scientific | 2016 |
| B & F (GB) Limited | Professional & scientific | 2003 |
| B Denyer Brickwork Limited | Construction | 2018 |
| B&T Group 21 Limited | Transport & logistics | 2025 |
| Backstage Synergy Holding Ltd | Hospitality | 2014 |
| Baedeca Property Ltd | Hospitality | 2022 |
| Bajura Ltd | Information & communication | 2014 |
| Balance Dentech Ltd | Manufacturing | 2026 |
| Balaton-Maia Ltd | Extraterritorial | 2012 |
| Balkana LUX Car Ltd | Wholesale & retail | 2025 |
| Bamtv Afrika Limited | Information & communication | 2023 |
| Barako Bar Ltd | Wholesale & retail | 2022 |
| Barby Digital Enterprise Ltd | Information & communication | 2021 |
| Bardentco Limited | Arts & recreation | 2012 |
| Barlife Holdings Limited | Information & communication | 2017 |
| Barnewell Ltd | Professional & scientific | 2022 |
| Barry Lloyd Consultancy Ltd | Administrative & support | 2009 |
| Bars & Pubs Management Limited | Hospitality | 2008 |
| Barstreet Ventures Limited | Administrative & support | 2024 |
| Bartlett Advisory Services Limited | Professional & scientific | 2015 |
| Base Enterprise Limited | Information & communication | 2001 |
| Batristan Ltd | Wholesale & retail | 2024 |
| Baxter EG Ltd | Real estate | 2017 |
| Bazaz Ltd | Professional & scientific | 2026 |
| BB & Co Services Ltd | Wholesale & retail | 2019 |
| BCZ Shop Ltd | Wholesale & retail | 2024 |
| Bear International LLP | | 2023 |
| Beauticologie Ltd. | Health & social care | 2014 |
| Beautiful Nails & Body Salon South Lodge Ltd | Other services | 2012 |