| Arfah Ltd | Professional & scientific | 2025 |
| Arianix Ltd | Wholesale & retail | 2025 |
| Arifaj Home Solutions Limited | Construction | 2025 |
| Ariftech Solutions Ltd | Information & communication | 2024 |
| Ariseol Ltd | Real estate | 2022 |
| Arnavut Tutors Limited | Education | 2025 |
| Arno Removals Limited | Water & waste | 2025 |
| Arolski Electrical Services Ltd | Construction | 2014 |
| Arous EL Nile for General Trading Ltd | Wholesale & retail | 2025 |
| ARP Consultants Limited | Wholesale & retail | 2018 |
| Arrowcorp Limited | Professional & scientific | 2008 |
| Arsha Foods Limited | Hospitality | 2026 |
| Art Zerruko Ltd | Wholesale & retail | 2014 |
| Arthur Developers Ltd | Construction | 2020 |
| Artur Constructions Ltd | Construction | 2019 |
| AS & AJ Properties Limited | Real estate | 2019 |
| AS Brothers Ltd | Real estate | 2018 |
| Asas Elmostakbal for Trading Ltd | Construction | 2025 |
| Ashali Ltd | Wholesale & retail | 2022 |
| Ashna Limited | Professional & scientific | 2010 |
| Ashta Laxmi Limited | Other services | 2023 |
| Ashutam Homes Ltd | Real estate | 2022 |
| ASI Private Limited | Health & social care | 2014 |
| ASK to US Limited | Real estate | 2025 |
| ASO Brands Ltd | Wholesale & retail | 2024 |
| Asphalt and Aggregate Solutions Ltd | Construction | 2019 |
| Aspire Restoration Ltd | Construction | 2015 |
| ASR Recruitment Ltd | Administrative & support | 2020 |
| Astra Live Entertainment Ltd | Wholesale & retail | 2025 |
| Astropack Gulf Ltd | Manufacturing | 2025 |
| Atek Mechanical Ltd | Construction | 2021 |
| Atelier Solaris Luxury Limited | Administrative & support | 2025 |
| Athamos Ltd | Health & social care | 2021 |
| Athena Social Ltd | Professional & scientific | 2023 |
| Atlena Logistics Ltd | Transport & logistics | 2023 |
| ATP Therapy Ltd | Health & social care | 2024 |
| ATT Build Ltd | Water & waste | 2026 |
| Audio Archive Ltd | Professional & scientific | 2024 |
| Aurelys Ltd | Manufacturing | 2025 |
| Auto Fit AI Ltd | Information & communication | 2025 |
| Auto Rely Ltd | Wholesale & retail | 2020 |
| Automate Advisors Ltd | Professional & scientific | 2024 |
| Autumn Meadows for Investment Ltd | Wholesale & retail | 2025 |
| Avad’Hydratedfruits Limited | Hospitality | 2026 |
| Avantizon Ltd | Information & communication | 2024 |
| Avenur Holdings Ltd | Wholesale & retail | 2021 |
| Avizaa Ltd | Information & communication | 2025 |
| Avon Real Estate Ltd | Real estate | 2024 |
| Avon Systems Limited | Information & communication | 2013 |
| AVR Technology Services Ltd | Information & communication | 2012 |
| AVZ Cars Ltd | Wholesale & retail | 2026 |
| Awaken Intelligence Ltd | Professional & scientific | 2026 |
| Aysa Consulting Ltd | Professional & scientific | 2009 |
| Ayyan Limited | Real estate | 2020 |
| Azure & Ivory Ltd | Financial services | 2025 |
| B & P Innovation Ltd | Real estate | 2025 |
| B and R Giles Electrical Limited | Construction | 2021 |
| B M Jewellery Limited | Manufacturing | 2016 |
| B.I. Tanning Limited | Professional & scientific | 2018 |
| B.O.S.B Ltd | Arts & recreation | 2019 |
| B2 Carsales Limited | Wholesale & retail | 2020 |
| B2 Glamhaus Ltd | Other services | 2025 |
| Baaz Developments Ltd | Construction | 2026 |
| Babies & BOO Ltd | Wholesale & retail | 2018 |
| Baby Threads Ltd | Wholesale & retail | 2021 |
| Baigari Ltd | Manufacturing | 2025 |
| Baihe Medical (UK) Ltd | Manufacturing | 2024 |
| Baker's Kitchens Limited | Construction | 2003 |
| Balanosh Ltd | Wholesale & retail | 2021 |
| Baldwin-Chambers Consultancy Ltd | Real estate | 2025 |
| Balla Contractors Limited | Construction | 2019 |
| Ballatus New World Ltd | Administrative & support | 2023 |
| Balseros Ltd | Hospitality | 2018 |
| Bandana Takeaway & Catering Ltd | Hospitality | 2023 |
| Bangladeshi Italian UK Welfare Association Limited | Other services | 2023 |
| Barber & Tytheridge Limited | | 1946 |
| Barratt Estate Ltd | Real estate | 2024 |
| Bartletts Florist Ltd | Wholesale & retail | 2022 |
| Bath House Freehold Limited | Households | 2022 |
| Bathu Properties Ltd | Real estate | 2016 |
| Bathu Property Investment Ltd | Real estate | 2021 |
| BAX Taverns Limited | Hospitality | 2014 |
| BBO Property Ltd | Real estate | 2020 |
| BD Property Management Limited | Real estate | 2023 |
| BDG Properties Ltd | Real estate | 2024 |
| BDK Flymusic Limited | Administrative & support | 2019 |
| Beatz N Bopz Parties Ltd | Hospitality | 2022 |
| Beauty Worlduk Limited | Other services | 2016 |
| Beba Services Limited | Construction | 2017 |
| Bedford Cars Limited | Wholesale & retail | 2025 |
| Bedrock Builders Ltd | Construction | 2026 |
| BEE Decors Limited | Other services | 2025 |
| Begrove Ltd | Construction | 2026 |
| Bejosh Care Services Limited | Health & social care | 2022 |
| Bejosh Limited | Health & social care | 2015 |
| Bell's Beauty Ltd | Other services | 2024 |
| Bella Napoli Pizzeria Limited | Hospitality | 2019 |
| Bella Retreat Ltd | Real estate | 2024 |
| Bellabow Limited | Education | 2017 |
| Bellgrove Medical Services Limited | Real estate | 2004 |