| Afon Edge Properties Limited | Hospitality | 2026 |
| Afri Stores Ltd | Wholesale & retail | 2024 |
| African Piano Lessons Ltd | Education | 2020 |
| Africanet Ltd | Information & communication | 2020 |
| Afriken Foods Ltd | Wholesale & retail | 2026 |
| AFS Trans Ltd | Transport & logistics | 2020 |
| Afsgrowth Ltd | Professional & scientific | 2013 |
| Afterglow Stoke Ltd | Other services | 2023 |
| AG & PG Holdings Limited | Financial services | 2020 |
| AG Engineering Supplies Limited | Wholesale & retail | 2019 |
| AG Express Ltd | Transport & logistics | 2021 |
| AG Plant Hire (UK) Limited | Administrative & support | 2014 |
| AG Plant Hire Holdings Limited | Administrative & support | 2017 |
| AG Plant Hire Stoke Limited | Administrative & support | 2017 |
| Agateka Ltd | Other services | 2017 |
| Agbor Empire Ltd | Hospitality | 2023 |
| AGE Paving Limited | Construction | 2019 |
| Agee Care Limited | Health & social care | 2015 |
| Agentallianz Limited | Arts & recreation | 2024 |
| Aggregated Carbon Offset Research Network Ltd | Professional & scientific | 2024 |
| Agie&Katie Ltd | Hospitality | 2017 |
| Agile Armour Leadership Ltd | Professional & scientific | 2025 |
| Agile Build Ltd | Construction | 2025 |
| Agingx Labs Ltd | Professional & scientific | 2024 |
| AGK Enterprise Limited | Administrative & support | 2018 |
| AGL Spedition Limited | Transport & logistics | 2020 |
| Agmire Limited | Professional & scientific | 2023 |
| Agnes and Arthur Limited | Health & social care | 2012 |
| Agnew Equine Ltd | Professional & scientific | 2012 |
| Agora Gardens Road Management Company Limited | Households | 2014 |
| AGP AGP Ltd | Other services | 2025 |
| Agri-Comm Engineering Ltd | Wholesale & retail | 2023 |
| Agrigriff Ltd | Extraterritorial | 2024 |
| Agriture Limited | Professional & scientific | 2017 |
| AGS GP Locum Limited | Health & social care | 2016 |
| AGV Stoke Ltd | Energy | 2023 |
| AGW Recruitment Limited | Administrative & support | 2025 |
| AH Hulme Property Services Limited | Real estate | 2025 |
| AH Solutions Private Limited | Wholesale & retail | 2024 |
| AH to Lets Ltd | Real estate | 2019 |
| Ahadhealthcarecompany Limited | Health & social care | 2015 |
| Ahead Pathways Limited | Administrative & support | 2025 |
| AHK Property Investment Ltd | Real estate | 2020 |
| Ahkoi Ltd | Wholesale & retail | 2025 |
| Ahmad Cafe Ltd | Hospitality | 2026 |
| Ahmadex Global Ltd | Wholesale & retail | 2026 |
| Ahmed Inspections Ltd | Professional & scientific | 2020 |
| AHOUSE4AHOME Ltd | Real estate | 2026 |
| Ahti Limited | Wholesale & retail | 2023 |
| AI ENG Ltd | Professional & scientific | 2024 |
| AI Process Excellence Consulting Limited | Professional & scientific | 2025 |
| AI Property Service Solutions Limited | Construction | 2025 |
| AI Sense Ltd | Information & communication | 2019 |
| AI Sports Media Ltd | Professional & scientific | 2025 |
| Aibek IT Staffing Resources Ltd | Information & communication | 2026 |
| AIDAN-27 Limited | Transport & logistics | 2025 |
| Aignite Labs Ltd | Information & communication | 2025 |
| AIM Motorsport Ltd | Professional & scientific | 2007 |
| AIM Technologies Group Ltd | Professional & scientific | 2020 |
| AIM Technologies Ltd | Information & communication | 2017 |
| Ainfay Retail Ltd | Wholesale & retail | 2026 |
| Air BEE Travel Ltd | Administrative & support | 2022 |
| Air IT Solutions Limited | Information & communication | 2024 |
| Air Tech Innovations Group Limited | Manufacturing | 2022 |
| Air Tech Innovations Limited | Manufacturing | 2016 |
| Air Tech Support Limited | Manufacturing | 2023 |
| Air Tight Roofing and Cladding Limited | Construction | 2015 |
| Airfawn Consultants Limited | Manufacturing | 1988 |
| Airline Economics Ltd | Professional & scientific | 2010 |
| Airport City Travel Staffs Limited | Transport & logistics | 2019 |
| Airport Private Cars Limited | Administrative & support | 2016 |
| Airr Digital Ltd | Other services | 2023 |
| Airsim Ltd | Wholesale & retail | 2026 |
| Airspace Gallery | Arts & recreation | 2008 |
| Airtight Testing Staffordshire Ltd | Construction | 2018 |
| Aisa Law Limited | Professional & scientific | 2023 |
| Aisha Boerboels Ltd | Agriculture & fishing | 2022 |
| Aiswi Trading Limited | Real estate | 2011 |
| AIT Building Consultancy Limited | Professional & scientific | 2026 |
| Aiwas Labs Ltd | Health & social care | 2025 |
| Aiwas Medical Ltd | Wholesale & retail | 2024 |
| Aiyla Consultancy Services Limited | Professional & scientific | 2024 |
| AJ & GA Holdings Co Ltd | Financial services | 2025 |
| AJ Green & Sons Limited | Wholesale & retail | 2026 |
| AJ Orbis Trading Ltd | Wholesale & retail | 2026 |
| AJ Pharmaceuticals Limited | Health & social care | 2023 |
| AJ Pipework Engineering Ltd | Construction | 2018 |
| AJ Rentals Stoke Ltd | Real estate | 2024 |
| AJ Shop Ltd | Wholesale & retail | 2023 |
| AJ Shutters & Blinds Ltd | Construction | 2024 |
| AJ Taverns Ltd | Hospitality | 2021 |
| AJB Commercial Ltd | Construction | 2016 |
| AJB Refurbishments Limited | Construction | 2024 |
| Ajeg Investments | Administrative & support | 2023 |
| AJG JET Solutions Limited | Professional & scientific | 2014 |
| AJN Financial Services Ltd | Financial services | 2011 |
| Ajpt Properties Ltd | Real estate | 2026 |
| AJR Mechanical Maintenance Ltd | Professional & scientific | 2024 |
| AJS Capital Limited | Financial services | 2024 |
| AJS Creations Ltd | Manufacturing | 2026 |