| Always Potential Ltd | Professional & scientific | 2018 |
| Aman Surgical Dressings Company Limited(The) | Real estate | 1955 |
| Amberbury Developments Limited | Real estate | 1996 |
| Ambientwindowshutters Ltd | Wholesale & retail | 2023 |
| Ambire Advisory Limited | Professional & scientific | 2025 |
| AMG Flooring Limited | Other services | 2003 |
| Ampereflow Ltd | Construction | 2023 |
| Ampereflow Property & Investments Ltd | Real estate | 2025 |
| AMS & Co Property Ltd | Real estate | 2025 |
| Analogue Solutions Limited | Extraterritorial | 1994 |
| Andies Electrics Ltd | Construction | 2021 |
| Andrew Pike Advisory Ltd | Professional & scientific | 2023 |
| Andrews Garden and Property Services Ltd | Construction | 2025 |
| Andton Holdings Limited | Real estate | 2000 |
| Angels of Barry Ltd | Hospitality | 2025 |
| Anglo Austrian Transport Ltd | Transport & logistics | 2019 |
| ANT & SEB Ltd | Arts & recreation | 2025 |
| Antiques and Interiors (South Wales) Ltd | Wholesale & retail | 2025 |
| Apex Accountancy SW Ltd | Professional & scientific | 2025 |
| Apex Cooling Ltd | Construction | 2023 |
| Apexlambda Ltd | Wholesale & retail | 2025 |
| Apollo Cleaning Group Ltd | Financial services | 2019 |
| Apollo W Cleaning Services Ltd | Administrative & support | 2018 |
| App Boss Ltd | Professional & scientific | 2024 |
| Approve My Mortgage Ltd | Financial services | 2022 |
| Aqua Spas Ltd | Manufacturing | 2011 |
| AR Evans Engineering Ltd | Professional & scientific | 2015 |
| Araz(I) Group Ltd | Wholesale & retail | 2024 |
| Arborline UK Limited | Professional & scientific | 2010 |
| Arbuthnot Opticians LLP | | 2023 |
| ARC Automotive Limited | Wholesale & retail | 2019 |
| ARC Electrical Engineering Solutions Ltd | Construction | 2016 |
| ARC RB Limited | Health & social care | 2025 |
| Armstrong Masonry Limited | Construction | 2011 |
| Arrow Builders (Construction) Limited | Wholesale & retail | 1966 |
| Art Carpentry & Joinery Ltd | Construction | 2026 |
| Asana Abode Ltd | Wholesale & retail | 2023 |
| ASC2000 Ltd | Information & communication | 2023 |
| ASG Carpentry Limited | Construction | 2014 |
| Asguard Solutions Limited | Professional & scientific | 2024 |
| Asher Water Treatment Limited | | 1988 |
| Ashleen Development Ltd | Real estate | 2019 |
| Ashley's Aviation Services Ltd | Manufacturing | 2015 |
| Asiyas Meals Ltd | Hospitality | 2025 |
| Askfrank Limited | Other services | 2014 |
| ASP Electrical Solutions Ltd | Construction | 2025 |
| Assault Systems Limited | Wholesale & retail | 1993 |
| Asset Technologies (London) Ltd | Information & communication | 2002 |
| Assured Electrical Solutions Limited | Construction | 2019 |
| Asthal Bohar Limited | Hospitality | 2022 |
| Astute Logistics (Barry) Limited | Wholesale & retail | 2024 |
| AT & KT Developments Ltd | Real estate | 2024 |
| AT Skin Clinics Limited | Wholesale & retail | 2026 |
| Atex Distribution Limited | Construction | 2019 |
| Atlantic Base Ltd | Transport & logistics | 2002 |
| Atlantic Cafe Barry Ltd | Hospitality | 2022 |
| Atlantic Crest Ltd. | Professional & scientific | 2017 |
| Atlantic Grill & Steak Bar Ltd | Hospitality | 2022 |
| Atreides Consulting Ltd | Information & communication | 2025 |
| Aurams Properties Limited | Real estate | 2016 |
| Austin Tyre Services Ltd | Wholesale & retail | 2011 |
| Autobarn Barry Ltd | Wholesale & retail | 2025 |
| Autopro Car Sales Ltd | Wholesale & retail | 2011 |
| AVA RAE Ltd | Other services | 2019 |
| Aviation Alliance UK Ltd | Construction | 2020 |
| Aviotek Ltd | Manufacturing | 2018 |
| Awan Foods Ltd | Hospitality | 2021 |
| Awesome Wales Enterprises CIC | Wholesale & retail | 2019 |
| AWY Investments Ltd | Real estate | 2024 |
| AXG Limited | Arts & recreation | 2021 |
| Azztan Limited | Other services | 2026 |
| B & C Caterers Limited | Hospitality | 2015 |
| B W Driving Solution Limited | Administrative & support | 2013 |
| B7R Limited | Real estate | 2022 |
| Baby Splash Ltd | Arts & recreation | 2011 |
| Bake Design Ltd | Extraterritorial | 2022 |
| Baker and Bray Pet Products Limited | Information & communication | 2020 |
| Baltimore Care Limited | Health & social care | 1997 |
| Baltimore House Residential Care Ltd | Health & social care | 2019 |
| Bambrah & Daughters Investments Limited | Real estate | 2019 |
| Bambrah Stores Ltd | Real estate | 2022 |
| Bangin' Byrgyr CYF | Hospitality | 2019 |
| BAO NAM Ltd | Other services | 2024 |
| Bar Envy Ltd | Hospitality | 2019 |
| Bar Enzo Limited | Hospitality | 2022 |
| Bar Level 1 Ltd | Hospitality | 2025 |
| Barley Unicorn Limited | Construction | 2017 |
| Barri A2Z Tyres 4 U Limited | Wholesale & retail | 2023 |
| Barrington Management Ltd | Financial services | 2017 |
| Barry 4K Barber Ltd | Other services | 2025 |
| Barry Advertiser Limited | Manufacturing | 1927 |
| Barry Athletic Club Limited | Arts & recreation | 1956 |
| Barry Bangers Ltd | Wholesale & retail | 2023 |
| Barry Barber Shop Ltd | Other services | 2023 |
| Barry Building Services Limited | Administrative & support | 2011 |
| Barry Cabinets Limited | | 1986 |
| Barry Card and Collector CON Limited | Other services | 2025 |
| Barry Curry House Ltd | Hospitality | 2025 |
| Barry Developments Limited | Real estate | 2002 |
| Barry Eats Ltd | Hospitality | 2024 |