| 2CI Engineering Limited | Professional & scientific | 2018 |
| 42 Durand Gardens 2019 Limited | Administrative & support | 2019 |
| 8G Intelligence Limited | Professional & scientific | 2013 |
| A & R Construction and Developments Ltd | Construction | 2022 |
| A J Gleeson Building and Groundworks Limited | Construction | 2013 |
| A Thousand Monkeys EOT Ltd | Professional & scientific | 2024 |
| A Thousand Monkeys Ltd | Other services | 2005 |
| A.J.D. Marine Electrical Services Limited | Manufacturing | 2016 |
| AA Consulting & Training Services (Holdings) Ltd | Administrative & support | 2023 |
| AA Consulting & Training Services Ltd | Administrative & support | 2005 |
| Accountant-C Limited | Professional & scientific | 2013 |
| Accountshare Limited | Professional & scientific | 2011 |
| Adapt Interiors Southern Ltd | Construction | 2021 |
| Adopt-Fit Limited | Information & communication | 1998 |
| Advanced Installation Services Ltd | Construction | 2016 |
| AE Property (London) 2 Ltd | Real estate | 2026 |
| AE Property (London) 3 Ltd | Real estate | 2026 |
| AE Property (London) Ltd | Real estate | 2025 |
| Aero-Therm Products Ltd | Construction | 2013 |
| Afin Limited | Administrative & support | 2018 |
| Agile Plumbing Ltd | Construction | 2017 |
| Agni Travel Limited | Administrative & support | 2009 |
| Aircraft Management and Technical Services Limited | Professional & scientific | 2011 |
| AL Boardman Limited | Professional & scientific | 2014 |
| Alma Mater Academy Ltd | Professional & scientific | 2019 |
| AMG Business Communications Ltd | Wholesale & retail | 2022 |
| Ampfield Consulting Services Ltd | Information & communication | 2017 |
| Anderwood Developments Limited | Real estate | 2016 |
| Ankibokimo Ltd | Professional & scientific | 2017 |
| Apollo Electrical Ltd | Construction | 2001 |
| Appleton Consulting Ltd | Professional & scientific | 2021 |
| Arbor Eco Consultancy Ltd | Administrative & support | 2019 |
| Arcade Arches Ltd | Arts & recreation | 2026 |
| Arcot Solutions Ltd | Administrative & support | 2018 |
| Armortek Limited | Manufacturing | 2007 |
| Arndale Bar Limited | Hospitality | 2019 |
| Artesian Transformational Leadership Limited | Other services | 2006 |
| Aspiring Visions Ltd | Education | 2026 |
| Associates Winchester Limited | Other services | 2017 |
| Athena Films Limited | Information & communication | 2005 |
| Atlam Consulting Ltd | Professional & scientific | 2021 |
| Avalon Technical Consultancy Ltd | Professional & scientific | 2026 |
| Aventador Consultancy Limited | Professional & scientific | 2013 |
| Aviex Ltd | Professional & scientific | 2011 |
| Axim Global (IP) Limited | Administrative & support | 2016 |
| Axim Holdings Limited | Information & communication | 2016 |
| B & K Management Limited | Real estate | 2015 |
| Backdoorshoes Ltd | Manufacturing | 2015 |
| Bartram Building Maintenance Services Limited | Construction | 2004 |
| Basingstoke DAB Limited | Information & communication | 2023 |
| Beales Gents Hairdressers Limited | Other services | 2002 |
| Beckins Property Management Ltd | Households | 2024 |
| Berkeley Events Limited | Arts & recreation | 2013 |
| Black Lantern Limited | Other services | 2017 |
| Blakes of Winchester Limited | Manufacturing | 2021 |
| Blue DOT Holdings Limited | Financial services | 2018 |
| Blue DOT Property Limited | Real estate | 2005 |
| Bluejay Limited | Professional & scientific | 2006 |
| BMT Consultancy Services Limited | Professional & scientific | 2024 |
| Bobcheck Ltd | Information & communication | 2021 |
| Bodycomplex Ltd | Arts & recreation | 2022 |
| Brand Xperiences Limited | Information & communication | 2014 |
| Broad Developments Limited | Construction | 2023 |
| Broadoak Training & Consultancy Limited | Professional & scientific | 2022 |
| Brooklands Plant & Tools Limited | Wholesale & retail | 2010 |
| Brown's Heating & Plumbing Limited | Construction | 2017 |
| C & M Scott Limited | Professional & scientific | 2003 |
| C D Scaffold (Sales and Hire) Ltd | Construction | 2022 |
| C D Scaffold (South) Ltd | Construction | 2022 |
| Caldbeck (Holdings) Limited | Administrative & support | 2013 |
| Candour Limited | Construction | 2010 |
| Capio Digital Marketing Ltd | Professional & scientific | 2021 |
| Caps Technical Services Ltd | Professional & scientific | 2022 |
| Caws Carpentry & Building Limited | Construction | 2005 |
| Caws Estates Ltd | Construction | 2025 |
| CB Sealants Limited | Manufacturing | 2023 |
| CC Hair (Southern) Limited | Other services | 2014 |
| CCD Solutions Ltd | Information & communication | 2003 |
| CCS Hospitality Limited | Hospitality | 2014 |
| Cedar Pest Ltd | Administrative & support | 2016 |
| Centre for Health Research and Education Limited | Professional & scientific | 2018 |
| Chandler's Ford PCN Limited | Health & social care | 2022 |
| Chandler’S Ford Nails & Spa Ltd | Other services | 2025 |
| Channel Intellect Limited | Professional & scientific | 2006 |
| Charly Lester Ltd | Professional & scientific | 2018 |
| Chefgary Limited | Hospitality | 2012 |
| China Exchange (UK) | Other services | 2014 |
| Chiquito Limited | Hospitality | 1984 |
| Choice Plastics Ltd | Manufacturing | 2025 |
| Chopilux Trading Ltd | Professional & scientific | 2024 |
| Ciiq UK Ltd | Wholesale & retail | 2013 |
| CJL Plumbing & Heating Services Ltd | Construction | 2017 |
| Claritanimus Limited | Health & social care | 2022 |
| Claytons Eggs Limited | Wholesale & retail | 2014 |
| Clean Heels Distribution Ltd | Professional & scientific | 2009 |
| CLEAN4U Fabricare Limited | Administrative & support | 2017 |
| CLEAN4U Maids Limited | Administrative & support | 2017 |
| Cleaner by Miles Ltd | Administrative & support | 2015 |
| Closi Limited | Professional & scientific | 2025 |
| Club Gaming Limited | Arts & recreation | 2023 |