| ASG Construction London Ltd | Construction | 2025 |
| Asgard HR Consulting LLP | | 2015 |
| Asgard HR Limited | Professional & scientific | 2019 |
| ASH J Transport Ltd | Administrative & support | 2025 |
| ASH SIM Ltd | Wholesale & retail | 2023 |
| Ashby 6 Estate Limited | Real estate | 2025 |
| Ashby 8 Estate Limited | Real estate | 2025 |
| Ashford FPS Limited | Professional & scientific | 2016 |
| Ashfords Property Services Limited | Construction | 2021 |
| Ashirwad Corporation Ltd | Real estate | 2023 |
| Ashking Limited | Extraterritorial | 2010 |
| Ashland Spice Limited | Hospitality | 2016 |
| Ashlay Property Investments Ltd | Real estate | 2025 |
| Asho Jawa Ltd | Wholesale & retail | 2022 |
| Ashoka Tailors Ltd | Manufacturing | 2025 |
| Ashpreet London Ltd | Wholesale & retail | 2020 |
| Ashta Jewellers Limited | Wholesale & retail | 2004 |
| Ashtra Ltd | Wholesale & retail | 2024 |
| Ashveen Ltd | Wholesale & retail | 2021 |
| Ashy Lighting Limited | Professional & scientific | 2017 |
| Ashyana Silks Ltd | Wholesale & retail | 2025 |
| Asi&Co Services Ltd | Construction | 2022 |
| Asia Worldwide Couriers Ltd | Transport & logistics | 2012 |
| Asian Community Concern C.I.C. | Administrative & support | 2020 |
| Asian Entertainment Alliance Limited | Professional & scientific | 2010 |
| Asian Fashion Ltd | Wholesale & retail | 2024 |
| Asian Food and Drinks Ltd | Wholesale & retail | 2023 |
| Asian Literary and Cultural Forum UK Community Interest Company | Arts & recreation | 2023 |
| Asian Meat & Poultry Convenience Store Limited | Wholesale & retail | 2016 |
| Asian Superstore Ltd | Wholesale & retail | 2025 |
| Asian Universal Media Limited | Information & communication | 2025 |
| Asianapparel Limited | Wholesale & retail | 2023 |
| Asimsha Ltd | Wholesale & retail | 2026 |
| ASJ Building Solution Ltd | Construction | 2019 |
| ASK Clinic Ltd | Health & social care | 2023 |
| Askaii Limited | Wholesale & retail | 2024 |
| Askgk Group Limited | Wholesale & retail | 2023 |
| Askpm Ltd | Households | 2026 |
| ASM Distributions Limited | Wholesale & retail | 2018 |
| Asma Ahmad Limited | Other services | 2022 |
| ASP Consultancy 1982 Limited | Professional & scientific | 2023 |
| Aspira Holdings Ltd | Real estate | 2025 |
| Aspire Beauty Clinic Limited | Other services | 2012 |
| Aspire Deals Ltd | Wholesale & retail | 2026 |
| Asra Care CIC | Real estate | 2023 |
| Asras Private Ltd | Wholesale & retail | 2025 |
| Assa UK Properties Limited | Real estate | 2026 |
| Assisi Property Maintenance Ltd | Construction | 2025 |
| Astra Meridian Ltd | Wholesale & retail | 2026 |
| Astro Dream Ltd | Other services | 2023 |
| AT Corporate Ltd | Wholesale & retail | 2012 |
| AT Digital Repair Centre Ltd | Wholesale & retail | 2023 |
| AT Enterprise London Ltd | Transport & logistics | 2024 |
| ATA Investments Limited | Administrative & support | 2025 |
| Atal Spirare Ltd | Wholesale & retail | 2024 |
| Atamjeet Singh Virk Ltd | Construction | 2025 |
| ATC Carpets & Furniture Ltd | Wholesale & retail | 2018 |
| ATC Furnishing Limited | Wholesale & retail | 2025 |
| Atcl Limited | Professional & scientific | 2012 |
| Atgatt Ltd | Wholesale & retail | 2017 |
| ATJ Investments Limited | Real estate | 2015 |
| Atlas Express UK Ltd. | Transport & logistics | 2011 |
| Atlas Promotions & Marketing Limited | Administrative & support | 2025 |
| Atlas Travel Services Ltd | Administrative & support | 2021 |
| Atlas Vehicle Solutions Limited | Transport & logistics | 2025 |
| Atlio Ltd | Information & communication | 2021 |
| ATM Cars Limited | Wholesale & retail | 2016 |
| ATP Capital Ltd | Extraterritorial | 2021 |
| ATP GAS Services Limited | Construction | 2006 |
| Atrix Properties Ltd | Real estate | 2022 |
| Attar Perfumes Ltd | Wholesale & retail | 2025 |
| Attwal Associates Limited | Real estate | 2007 |
| Attwal Business Consultancy Limited | Professional & scientific | 2022 |
| Atwal Services Ltd | Construction | 2023 |
| Atwal UK Construction Limited | Construction | 2025 |
| Audi Construction Limited | Construction | 2018 |
| Augment Business Limited | Wholesale & retail | 2024 |
| Aujla Global Group Ltd | Wholesale & retail | 2026 |
| Aulakh Builders Limited | Construction | 2024 |
| Aulakh Construction Ltd | Construction | 2017 |
| Aulakh D S Construction Ltd | Construction | 2024 |
| Aulakh Waymaker Ltd | Transport & logistics | 2025 |
| AUM Care Group (UK) Ltd | Health & social care | 2019 |
| AUM F CIC | Public administration | 2024 |
| Aumz Ltd | Wholesale & retail | 2025 |
| Auquest Ltd | Wholesale & retail | 2021 |
| Aura Cinematography Ltd | Information & communication | 2015 |
| Aurelio Photography Limited | Professional & scientific | 2012 |
| Aurelius Education Ltd | Education | 2026 |
| Aureumclothing Ltd | Wholesale & retail | 2025 |
| Aureus Apartments Ltd | Real estate | 2026 |
| Aurevia Holdings Ltd | Real estate | 2025 |
| Auric Boutique Limited | Manufacturing | 2020 |
| Aurum Central London Ltd | Hospitality | 2018 |
| Auto Bonanza Ltd | Wholesale & retail | 2023 |
| Auto Medicz Ltd | Wholesale & retail | 2026 |
| Auto Motors Hub Ltd | Wholesale & retail | 2026 |
| Auto Tech Southall Ltd | Wholesale & retail | 2024 |
| Autohause Ltd | Wholesale & retail | 2026 |
| Autohub & Recovery Ltd | Wholesale & retail | 2025 |