| Airstore Limited | Other services | 2013 |
| Airtech Commissioning Limited | Professional & scientific | 1998 |
| Airtech Commissioning Trustee Company Limited | Extraterritorial | 2025 |
| Airtech Controls Limited | Professional & scientific | 1996 |
| Airtech Controls Trustee Company Limited | Extraterritorial | 2020 |
| Airtech Optimise Limited | Administrative & support | 2014 |
| Airtell UK Ltd | Wholesale & retail | 2015 |
| Airtower Ltd | Wholesale & retail | 2020 |
| Airtrip Travel Ltd | Administrative & support | 2016 |
| Airtronics UK Ltd | Wholesale & retail | 2019 |
| AIS (BC) Investments Ltd | Real estate | 2026 |
| AIS (UK) Investments Limited | Real estate | 2016 |
| AIS Business Consulting Ltd | Information & communication | 2016 |
| AIS Properties Ltd | Real estate | 2019 |
| AIS Support Services Ltd | Administrative & support | 2017 |
| Aish Birmingham Limited | Other services | 2021 |
| Aish Logistics Limited | Transport & logistics | 2024 |
| Aisha Halal Meat Limited | Manufacturing | 2011 |
| Aisha Holdings Limited | Real estate | 2022 |
| Aisha Mobile Beauty Limited | Administrative & support | 2024 |
| Aisha Realty Limited | Real estate | 2021 |
| Aisha the Indian Princess Ltd | Wholesale & retail | 2012 |
| Aishah Khan Ltd | Wholesale & retail | 2022 |
| Aishi Enterprises Ltd | Professional & scientific | 2023 |
| Aisimulator Ltd | Information & communication | 2022 |
| Aisin Europe Manufacturing (UK) Ltd. | Manufacturing | 1997 |
| Aisle&After Events Ltd | Hospitality | 2025 |
| Aisling Ventures Limited | Professional & scientific | 2026 |
| AIT Builders Ltd | Construction | 2025 |
| AIT Buildings Repair Limited | Construction | 2019 |
| Aita Properties Limited | Real estate | 2024 |
| Aitb Ltd | Real estate | 2019 |
| Aitchison Cost Consultants Ltd | Professional & scientific | 2022 |
| Aitken Accountancy Solutions Ltd | Professional & scientific | 2014 |
| Aitzaz Group Ltd | Wholesale & retail | 2025 |
| AIU Homes Limited | Real estate | 2024 |
| AIU Partners Ltd | Professional & scientific | 2024 |
| Aiuksolutions Limited | Information & communication | 2025 |
| Aivis Technology Ltd | Information & communication | 2014 |
| Aivistaapartments Ltd | Real estate | 2025 |
| Aiya Foods Limited | Wholesale & retail | 2026 |
| Aiying Beads Limited | Wholesale & retail | 2014 |
| Aiyla Abaya Ltd | Wholesale & retail | 2025 |
| Aiyom Partners Ltd | Real estate | 2025 |
| Aizah Medical Limited | Health & social care | 2020 |
| Aize Products Ltd | Wholesale & retail | 2023 |
| AJ & AD Ltd | Wholesale & retail | 2025 |
| AJ Blinds Ltd | Other services | 2017 |
| AJ Bro's Ltd | Wholesale & retail | 2026 |
| AJ Business Support UK Limited | Administrative & support | 2026 |
| AJ Butchers Ltd | Wholesale & retail | 2016 |
| AJ Chauffeurs Limited | Transport & logistics | 2019 |
| AJ Coaches Ltd | Transport & logistics | 2025 |
| AJ Commercial Manufacture Ltd | Manufacturing | 2025 |
| AJ Computers Ltd | Wholesale & retail | 2018 |
| AJ Construction Service Ltd | Construction | 2024 |
| AJ Consultancy Birmingham Ltd | Professional & scientific | 2024 |
| AJ Convenience & Home Store Ltd | Wholesale & retail | 2025 |
| AJ Dealnetwork Ltd | Administrative & support | 2025 |
| AJ Electrical Midlands Limited | Administrative & support | 2017 |
| AJ Estates Midlands Ltd | Real estate | 2018 |
| AJ Executive Ltd | Transport & logistics | 2026 |
| AJ Executive Travel Ltd | Administrative & support | 2014 |
| AJ Food & Wine Limited | Wholesale & retail | 2015 |
| AJ Food Packers Ltd | Manufacturing | 2022 |
| AJ GAS & Plumbing Ltd | Construction | 2024 |
| AJ Hair Salon Limited | Other services | 2019 |
| AJ Handyman Ltd | Construction | 2026 |
| AJ Homes & Lettings Limited | Real estate | 2021 |
| AJ Hospitality Group Ltd | Hospitality | 2026 |
| AJ Lettings and IT / AI Consultancy Ltd | Real estate | 2026 |
| AJ Logistics Solutions Ltd | Transport & logistics | 2025 |
| AJ Mechanics Limited | Other services | 2017 |
| AJ Medical Services Ltd | Health & social care | 2017 |
| AJ Metals Ltd. | Water & waste | 2016 |
| AJ Midlands Limited | Real estate | 2017 |
| AJ Mpharm Ltd | Health & social care | 2024 |
| AJ Optical Services Ltd | Health & social care | 2021 |
| AJ Performance Car Sales Ltd | Wholesale & retail | 2024 |
| AJ Premium Services Limited | Administrative & support | 2025 |
| AJ Prime Cleaning Ltd | Administrative & support | 2025 |
| AJ Real Estate Property Development Limited | Real estate | 2022 |
| AJ Recruitment Agency Ltd | Construction | 2024 |
| AJ Recycling Midlands Ltd | Manufacturing | 2020 |
| AJ Secura Ltd | Financial services | 2022 |
| AJ Signature Estates Ltd | Real estate | 2026 |
| AJ Speedline Ltd | Transport & logistics | 2025 |
| AJ Straight Solutions Ltd | Education | 2011 |
| AJ Subs Ltd | Hospitality | 2025 |
| AJ Taxi Rentals Ltd | Administrative & support | 2025 |
| AJ Tyres Birmingham Ltd | Wholesale & retail | 2016 |
| AJ Wright Associates Limited | Professional & scientific | 2020 |
| Aj&K Constructions Ltd | Construction | 2025 |
| Aj's Mobile Valeting Services Ltd | Administrative & support | 2020 |
| AJ13 Ventures Ltd | Financial services | 2024 |
| AJA Pharm Limited | Health & social care | 2025 |
| Aja's Creation 1 Limited | Wholesale & retail | 2025 |
| Ajaa Consultancy Group Ltd | Real estate | 2025 |
| Ajaa Consultancy Limited | Construction | 2022 |
| Ajaa Property Ltd | Real estate | 2025 |