| AD Atlantic Limited | Administrative & support | 2020 |
| AD Idem Search Limited | Administrative & support | 2024 |
| AD Interactive Limited | Information & communication | 2007 |
| Adam Kitchen Appliances Ltd | Construction | 2026 |
| Adam Quelch Video Limited | Professional & scientific | 2016 |
| Adams Plumbing and Heating Services Limited | Construction | 2023 |
| Adapt IT Solutions Ltd | Information & communication | 2025 |
| Ada’S Deli Ltd | Wholesale & retail | 2023 |
| Addington Court Operations Limited | Arts & recreation | 2019 |
| Addington Court Property Limited | Professional & scientific | 2017 |
| ADG Systems PLC | Construction | 1990 |
| Adipa Global Ltd | Manufacturing | 2019 |
| Adjuice SEO Services Ltd | Professional & scientific | 2007 |
| Admiral House (Camberley) RTM Company Limited | Households | 2025 |
| Adrian Moorhouse Organisation Ltd | Professional & scientific | 2026 |
| Adsolute.Co.Uk Ltd | Information & communication | 2024 |
| ADU Healthcare Ltd | Health & social care | 2022 |
| Advance Plumbing & Drainage Ltd | Construction | 2013 |
| Advanced Communication Services Ltd | Construction | 2012 |
| Advanced Effects Limited | Professional & scientific | 2017 |
| Adventure Assets Ltd | Real estate | 2022 |
| Adwise Consulting Ltd | Professional & scientific | 2015 |
| AE Barbers Limited | Other services | 2023 |
| AEL CCS Limited | Manufacturing | 2024 |
| Aerobility Holdings CIC | Manufacturing | 2019 |
| Aerospace Military & Commercial Limited | Manufacturing | 2009 |
| Aether Telecoms Ltd | Information & communication | 2022 |
| AF Advisors Limited | Professional & scientific | 2013 |
| AF Capital Holdings Limited | Wholesale & retail | 2022 |
| Affluent Futures Limited | Administrative & support | 2007 |
| Afri-Mail Limited | Transport & logistics | 2014 |
| Africa Power Operations Limited | Mining & quarrying | 2013 |
| Afro by David Ltd | Other services | 2025 |
| Afterglo Ltd | Other services | 2017 |
| Agag Innovations (AI) Ltd | Professional & scientific | 2024 |
| Against the Grain Barbers Limited | Other services | 2021 |
| Agard Security Ltd | Administrative & support | 2021 |
| AGC Solutions Limited | Information & communication | 2008 |
| Agencyland Limited | Administrative & support | 2018 |
| Agile Finance Services Ltd | Professional & scientific | 2024 |
| Agile Structures Limited | Manufacturing | 2012 |
| Agincourt Hall,Limited | Real estate | 1928 |
| Aglenge Mech Design Ltd | Professional & scientific | 2017 |
| AGM Civil Engineering Limited | Professional & scientific | 2016 |
| Agniture Limited | Information & communication | 2005 |
| AGR Auto Body Repair Ltd | Wholesale & retail | 2013 |
| Agua-Technics Limited | Manufacturing | 2001 |
| Ahdl Properties Ltd | Real estate | 2024 |
| Ahps Today Limited | Administrative & support | 2022 |
| AI Company Services Limited | Information & communication | 2026 |
| AI Kabz Ltd | Information & communication | 2026 |
| AI4SPACE Ltd | Information & communication | 2021 |
| Air CON Environmental Limited | Energy | 2009 |
| Air Personnel Ltd | Administrative & support | 2018 |
| Airlanka Cargo Limited | Transport & logistics | 2022 |
| Airlie Enterprises Limited | Information & communication | 2002 |
| Airline Experience Ltd | Professional & scientific | 2020 |
| Airsoft Wholesale (UK) Limited | Wholesale & retail | 2018 |
| Airtight Aviation Services Ltd | Transport & logistics | 2016 |
| AIS Consult Ltd | Information & communication | 2026 |
| Aizu Limited | Information & communication | 2017 |
| AJ Couriers Ltd | Transport & logistics | 2025 |
| AJ Scott Enterprises Ltd | Professional & scientific | 2017 |
| AJA Care Services Ltd | Health & social care | 2018 |
| AJB Healthcare Management Services Ltd | Professional & scientific | 2022 |
| AJE Construction Limited | Construction | 2024 |
| AJL Real Estate Rentals Ltd | Households | 2019 |
| AJN Group Limited | Financial services | 2023 |
| AJP Building and Consultancy Ltd | Construction | 2026 |
| AJV Estates Ltd | Real estate | 2020 |
| AJV Property Services (UK) Ltd | Real estate | 2016 |
| AJW Facilities Limited | Households | 2014 |
| Akaal Developments Ltd | Real estate | 2025 |
| Akaal Estates Ltd | Real estate | 2015 |
| Akaal Sahai Properties Ltd | Real estate | 2026 |
| Akam Builders Ltd | Construction | 2019 |
| Akarpa Property Ltd | Real estate | 2026 |
| Akilesh Limited | Health & social care | 2014 |
| AKS Capital Limited | Real estate | 2024 |
| AL Karim Group Limited | Financial services | 2025 |
| AL Siddique Trading Limited | Wholesale & retail | 2025 |
| Alan Francis Estate Agents & Lettings Limited | Real estate | 2009 |
| Alan Wells Camera Services Ltd | Information & communication | 2001 |
| Aland Engineering Consultancy Ltd | Professional & scientific | 2024 |
| Alawf Ltd | Hospitality | 2022 |
| ALB Build Ltd | Construction | 2025 |
| Albproperty Ltd | Real estate | 2026 |
| Albus Studios Ltd | Wholesale & retail | 2020 |
| Alcon EYE Care UK Limited | Professional & scientific | 1964 |
| Alcon Laboratories (U.K.) Limited | Manufacturing | 1969 |
| Alder Green Management Company Limited | Households | 2022 |
| Alderholt 2 (Residents Management Company) Ltd | Households | 2023 |
| Aldworth Residents Company Limited | Households | 1984 |
| Alex Automotive Limited | Professional & scientific | 2017 |
| Alex B Services Ltd | Wholesale & retail | 2021 |
| Alex Barber Shop (Camberley) Limited | Other services | 2025 |
| Alex Rusu Ltd | Transport & logistics | 2022 |
| Alexander James MS Limited | Extraterritorial | 2016 |
| Alexander Payne Design Limited | Professional & scientific | 2020 |
| Alexandra Road Properties Farnborough LLP | | 2017 |