| Aston 200 LP | | 2013 |
| Aston Cavendish Limited | Information & communication | 2020 |
| Aston Centre Limited | Other services | 2025 |
| Aston GP Limited | Administrative & support | 2013 |
| Aston Guard Limited | Other services | 2024 |
| Aston James Holdings Limited | Real estate | 2019 |
| Aston Links Interphase Ltd | Professional & scientific | 2018 |
| Aston Mead Building Solutions Ltd | Other services | 2013 |
| Aston Property Ventures Limited | Real estate | 2023 |
| Aston Solutions GAS & Electrical Ltd | Construction | 2017 |
| Astoncroft Trading Limited | Wholesale & retail | 2024 |
| Astonmead Limited | Wholesale & retail | 2009 |
| Astonmont Limited | Wholesale & retail | 2014 |
| Astoria Holdings Unlimited | Professional & scientific | 2021 |
| Astounding Grounds Ltd | Construction | 2019 |
| Astra Driving School Limited | Wholesale & retail | 2024 |
| Astra Education Ltd | Education | 2016 |
| Astra EGY Ltd | Manufacturing | 2025 |
| Astra Heating Services UK Ltd | Construction | 2026 |
| Astra NW Limited | Arts & recreation | 2025 |
| Astra Partitions Ltd | Construction | 2025 |
| Astra Signs Limited | Manufacturing | 1995 |
| Astra Telematics Limited | Professional & scientific | 2009 |
| Astra Urban Investments Ltd | Real estate | 2023 |
| Astraea Medical Ltd | Health & social care | 2026 |
| Astraeus Consulting Limited | Professional & scientific | 2016 |
| Astrak EBT Limited | Extraterritorial | 2024 |
| Astrak Global Limited | Extraterritorial | 2021 |
| Astral Chemical Solutions Limited | Wholesale & retail | 2000 |
| Astral Node Ltd | Information & communication | 2025 |
| Astral PS Ltd | Professional & scientific | 2011 |
| Astral Search Limited | Administrative & support | 2022 |
| Astrametonic Aegean Estates Ltd | Real estate | 2024 |
| Astranova Commerce Ltd | Wholesale & retail | 2026 |
| Astraseal Systems Limited | | 1939 |
| Astrella London Ltd | Wholesale & retail | 2023 |
| Astri Devs Ltd | Information & communication | 2025 |
| Astrix Consulting Services UK Limited | Information & communication | 2015 |
| Astrixor for International Trading Limited | Extraterritorial | 2026 |
| Astro Agricultural Limited | Professional & scientific | 2012 |
| Astro Gears Limited | Wholesale & retail | 2023 |
| Astro Vapours Ltd | Wholesale & retail | 2023 |
| Astrocare Computer Cleaning UK Ltd | Information & communication | 2011 |
| Astroeast Ltd | Information & communication | 2025 |
| Astroflux Ltd | Wholesale & retail | 2025 |
| Astron Packaging Limited | Manufacturing | 1996 |
| Astronomically Zealous Estates Limited | Real estate | 2021 |
| Astrophel Properties Ltd | Real estate | 2024 |
| Astrozon UK Ltd | Wholesale & retail | 2025 |
| Astrum Developments Limited | Real estate | 2023 |
| Astute Commercial Catering Equipment Services Ltd | Professional & scientific | 2021 |
| Astute Commercial Ltd | Information & communication | 2025 |
| Astute Finance Limited | Financial services | 2018 |
| Astute Innovative Healthcare Ltd | Public administration | 2021 |
| Astute SAM Limited | Information & communication | 2016 |
| ASU Properties Limited | Real estate | 2007 |
| Asul Ltd | Real estate | 2023 |
| Asumahq Ltd | Information & communication | 2026 |
| Asure Law Limited | Professional & scientific | 2024 |
| Asurex Limited | Wholesale & retail | 2002 |
| Asvh Group Ltd | Real estate | 2024 |
| Asvh Properties Limited | Real estate | 2024 |
| ASW Digital Ltd | Professional & scientific | 2017 |
| ASW Holdings Limited | Financial services | 2024 |
| Aswaad Ltd | Wholesale & retail | 2024 |
| Aswad Travels Ltd | Transport & logistics | 2024 |
| Aswah Baby Sophie for Ready Made Garments Ltd | Wholesale & retail | 2026 |
| Aswaq Alriyf Liltijarat Walmuqawalat Ltd | Wholesale & retail | 2025 |
| Aswaq WA Makhabiz AL Matjar for Trading Ltd | Wholesale & retail | 2025 |
| Aswr Independent BMW Dismantlers Limited | Wholesale & retail | 2023 |
| Aswr Motorbodies Ltd | Wholesale & retail | 2023 |
| Asyahtrade Ltd | Wholesale & retail | 2024 |
| Asylum Legal Ltd | Professional & scientific | 2022 |
| AT & J Enterprises Limited | Health & social care | 2011 |
| AT 15 Limited | Other services | 2022 |
| AT Award Ltd | Education | 2019 |
| AT Dental Ltd | Health & social care | 2019 |
| AT Design Solutions Ltd | Professional & scientific | 2012 |
| AT DG SP Limited | Wholesale & retail | 2025 |
| AT Engineering Solutions Limited | Other services | 2018 |
| AT Event MCR Ltd | Manufacturing | 2023 |
| AT Heart Cardiology Ltd | Health & social care | 2025 |
| AT Immigration Solutions Limited | Wholesale & retail | 2013 |
| AT Languages Ltd | Administrative & support | 2015 |
| AT Legal Claim Ltd | Professional & scientific | 2015 |
| AT Lintels Limited | Wholesale & retail | 2013 |
| AT One Investments Ltd | Real estate | 2022 |
| AT Signalling Ltd | Construction | 2025 |
| AT Study Advisers Ltd | Education | 2023 |
| AT Suppliers Ltd | Wholesale & retail | 2023 |
| AT Talent Ltd | Administrative & support | 2022 |
| AT Technical Limited | Information & communication | 2018 |
| AT Travel Status Ltd | Professional & scientific | 2026 |
| At&Al Healthcare Limited | Extraterritorial | 2023 |
| At-Taajir the Merchant Ltd | Wholesale & retail | 2021 |
| AT. V.S Edwards Ltd | Health & social care | 2021 |
| At.Netcomms Limited | Information & communication | 2003 |
| AT11F Ltd | Transport & logistics | 2017 |
| ATA Locums Ltd | Administrative & support | 2024 |
| ATA Servces Manchester Ltd | Administrative & support | 2026 |