| 11 Dennington Park Road Limited | Real estate | 2016 |
| 1960 Solutions Limited | Professional & scientific | 2020 |
| 1M Project Services Ltd. | Construction | 2019 |
| 1MPG Ltd | Real estate | 2026 |
| 23A & 23B Cumberland Road Ltd | Households | 1997 |
| 32/34 Stockwell Park Crescent Limited | Households | 1990 |
| 32T Limited | Financial services | 2007 |
| 37 Sutherland Street Management Company Limited | Real estate | 2007 |
| 50 Barons Court Road Residency Ltd | Households | 2009 |
| 50 Stockbridge Road Limited | Real estate | 2016 |
| 51 the Dean Limited | Construction | 2018 |
| 9 East Street Management Limited | Extraterritorial | 2012 |
| A & B Homes (South) Limited | Construction | 1988 |
| A and K Home Improvements Limited | Construction | 1986 |
| A N Breeding Limited | Agriculture & fishing | 2013 |
| A P Loveridge Limited | Real estate | 1944 |
| A Vintage Garden Limited | Wholesale & retail | 2009 |
| A&B Homes Holdings Limited | Financial services | 2015 |
| A. & B. Homes Limited | Construction | 1982 |
| A.W. Taylor (Alresford) Ltd | Construction | 2002 |
| A7A Consulting Limited | Professional & scientific | 2016 |
| Abbott Barker Brooks Limited | Professional & scientific | 1999 |
| Abinger Properties Limited | Extraterritorial | 2023 |
| Able Components Limited | Manufacturing | 2013 |
| ACC (UK) Limited | Wholesale & retail | 2003 |
| Accc Promotions Limited | Real estate | 2020 |
| ACH Legal Limited | Professional & scientific | 2010 |
| Adam Mitchinson Ltd | Professional & scientific | 2012 |
| Adecat Group Ltd | Transport & logistics | 2024 |
| Adket Properties Ltd | Real estate | 1999 |
| Advoco Planning Limited | Professional & scientific | 2011 |
| Aggrilime Supplies Ltd | Mining & quarrying | 2025 |
| Agms Investments LLP | | 2025 |
| Agricultural Material Supplies Ltd | Agriculture & fishing | 2024 |
| Agritask Ltd | Administrative & support | 2009 |
| AJ Minett Limited | Financial services | 2024 |
| Akesisrehab Ltd | Health & social care | 2023 |
| Alderbrook Stud LLP | | 2022 |
| Alderson Slater Ltd | Professional & scientific | 2025 |
| Alem Ltd | Arts & recreation | 2021 |
| Alendi Consulting Limited | Professional & scientific | 2014 |
| Alexski Ltd | Wholesale & retail | 2021 |
| ALJ Limited | Professional & scientific | 2022 |
| Alkaline Music Productions Ltd | Arts & recreation | 2024 |
| Allso-Print Limited | Manufacturing | 2006 |
| Almeaka Limited | Information & communication | 2015 |
| Almeida Management Limited | Professional & scientific | 1998 |
| Alresford Blinds Ltd | Wholesale & retail | 2018 |
| Alresford Builders' Merchants Limited | Wholesale & retail | 1985 |
| Alresford Design & Build Ltd | Professional & scientific | 2016 |
| Alresford Estates Ltd | Real estate | 2014 |
| Alresford Handyman Services Ltd | Construction | 2018 |
| Alresford Sandwich Shop Ltd | Hospitality | 2026 |
| Alresford Studios Ltd | Arts & recreation | 2020 |
| Alresford Town Community Football Club CIC | Education | 2026 |
| Alresford Town Private Hire Limited | Transport & logistics | 2018 |
| Alresford Water Treatment Services Limited | Water & waste | 2015 |
| Alresford Yoga Loft Ltd | Health & social care | 2020 |
| Althera Group Ltd | Financial services | 2026 |
| AM Berry Commercial Limited | Hospitality | 2025 |
| Amelfi Limited | Manufacturing | 2022 |
| AMG Wombell Ltd | Construction | 2021 |
| Ancient Materials Ltd | Manufacturing | 2015 |
| ANN Brosnan Ltd. | Professional & scientific | 2003 |
| Anna Ross Dressage Ltd | Agriculture & fishing | 2025 |
| Apogee Data Solutions Limited | Information & communication | 2007 |
| Appatcollege Ltd | Information & communication | 2018 |
| Appleton Contracting South Ltd | Agriculture & fishing | 2019 |
| Applied Structural Analysis Ltd | Professional & scientific | 2006 |
| Aptenor Limited | Professional & scientific | 2026 |
| Arbejdsglaede Ltd | Other services | 2020 |
| Ardbraccan Limited | Real estate | 2025 |
| Arego Systems Ltd | Information & communication | 2021 |
| Arion Global Technologies and Capital Ltd | Information & communication | 2025 |
| Arion Ranch Ltd | Agriculture & fishing | 2024 |
| Arle Capital Partners Limited | Financial services | 2022 |
| Arlebury Park Farm Barns Management Company Limited | Households | 1994 |
| Arlebury Parkland Limited | Arts & recreation | 2015 |
| ARW Training Solutions Limited | Professional & scientific | 2014 |
| ASH Turkish Barber Limited | Other services | 2021 |
| ASK Butler Limited | Professional & scientific | 1999 |
| Association of UK Course Measurers | Arts & recreation | 2017 |
| Avon Capital Estates (Australia) Limited | Construction | 1981 |
| Avon Capital Estates 1 LLP | | 2002 |
| Avon Capital Estates 2 Holdings Ltd | Financial services | 2024 |
| Avon Capital Estates 2 Limited | Real estate | 2004 |
| Avon Capital Estates 3 Holdings Ltd | Financial services | 2024 |
| Avon Capital Estates 3 Ltd | Financial services | 2024 |
| Avon Capital Estates Management Limited | Real estate | 2002 |
| Axigan Limited | Professional & scientific | 1990 |
| Aymor Limited | Real estate | 2006 |
| B & P Auto Ltd | Wholesale & retail | 2025 |
| Bachelor Holdings Limited | Financial services | 2024 |
| Back of the Sofa Limited | Professional & scientific | 2016 |
| Barley Brothers PUB Company Ltd | Hospitality | 2021 |
| Barnes & Liddiard Electrical Contractors Limited | Construction | 2003 |
| Barries Ltd | Manufacturing | 2019 |
| Bayti Consulting Ltd | Professional & scientific | 2024 |
| Beau Gardens Limited | Administrative & support | 2006 |
| Bellet Limited | Wholesale & retail | 1981 |