| 74 Maidstone Road Management Company Limited | Real estate | 2013 |
| 7474 Limited | Hospitality | 2024 |
| 75-77 ST John's Hill Ltd | Households | 2017 |
| 76 High Street Limited | Real estate | 2021 |
| 79SR Management Ltd | Households | 2021 |
| 7BONE Portswood Ltd | Hospitality | 2013 |
| 8 - 10 Havelock Road Company Limited | Real estate | 2017 |
| 8 Ball Events Ltd | Arts & recreation | 2017 |
| 8-BIT APE LP | | 2019 |
| 86 Victoria Road Management Ltd | Households | 2023 |
| 86 VRN a Ltd | Real estate | 2020 |
| 86 VRN B Ltd | Real estate | 2020 |
| 88 Christchurch Road Freehold Limited | Extraterritorial | 2017 |
| 888 Recruitment Solutions Ltd | Administrative & support | 2021 |
| 888DEALS Ltd | Wholesale & retail | 2025 |
| 8A Tower Road Ltd | Real estate | 2019 |
| 8AM Global Limited | Professional & scientific | 2020 |
| 9 Degree Barber Limited | Other services | 2025 |
| 9 Rockstone Place Ltd | Information & communication | 2013 |
| 9 Whittingstall Road Property Management Limited | Households | 2022 |
| 90 Andersons Road RTM Company Ltd | Households | 2019 |
| 930UXR Ltd | Professional & scientific | 2024 |
| 94 Milton Park Management Limited | Real estate | 1984 |
| 94A Cobden AVE Management Limited | Real estate | 2015 |
| 95 Group Ltd | Financial services | 2025 |
| 95MS Limited | Professional & scientific | 2009 |
| 99 Bikes Limited | Wholesale & retail | 1998 |
| 99 Rockets Ltd | Information & communication | 2022 |
| : G&L Escort Ltd | Transport & logistics | 2022 |
| @Baxters Cafe-Kitchen Ltd | Hospitality | 2019 |
| @Laurencequiz Ltd | Arts & recreation | 2023 |
| @Nichegirl Ltd | Other services | 2025 |
| A & a Business Supplies Limited | Wholesale & retail | 1995 |
| A & a Head Ltd | Wholesale & retail | 2016 |
| A & a Interiors Limited | Construction | 2009 |
| A & B Properties (Hampshire) Ltd | Agriculture & fishing | 2015 |
| A & D Plumbing and Heating (Hampshire) Limited | Construction | 2022 |
| A & D Wood Ltd | Financial services | 2014 |
| A & E Anfield FRY House Ltd | Hospitality | 2025 |
| A & E Diesels Ltd | Wholesale & retail | 2021 |
| A & H Kaur Limited | Hospitality | 2022 |
| A & J Jones Property Consultants Limited | Professional & scientific | 2021 |
| A & M Building & Home Adaption Specialists Limited | Construction | 2026 |
| A & M Contractors Limited | Construction | 2006 |
| A & M Vincent Properties Limited | Real estate | 2016 |
| A & P Properties (Southampton) Limited | Administrative & support | 2018 |
| A & R Construction (Southampton) Ltd | Construction | 2023 |
| A & R Property Developers Limited | Real estate | 2025 |
| A & S Scaffolding (Southern) Limited | Construction | 2003 |
| A 2 Z Shipping Services Ltd | Transport & logistics | 2021 |
| A a Jamka Studio Honey Limited | Other services | 2024 |
| A and G Fencing and Building Maintenance Ltd | Construction | 2010 |
| A and R Groundworks Ltd | Construction | 2013 |
| A B Construction SW Ltd | Construction | 2015 |
| A B Jones Limited | Other services | 2011 |
| A Beauty (Southampton) Ltd | Other services | 2023 |
| A Bishop and SON Limited | Extraterritorial | 2015 |
| A Builder (Netley) Limited | Construction | 2007 |
| A C Mechanical Repairs Limited | Wholesale & retail | 2020 |
| A Class Construction Southern Limited | Construction | 2013 |
| A Corn Equipment Limited | Administrative & support | 2018 |
| A Deane Holdings Limited | Extraterritorial | 2014 |
| A Dibden Builders Limited | Construction | 2012 |
| A F Electrical and Sons Ltd | Construction | 2021 |
| A Fletcher and Sons Limited | Construction | 2004 |
| A Gill 4 Gill Ltd | Hospitality | 2024 |
| A Global E Markets LP | | 2011 |
| A Good Practitioner Limited | Health & social care | 2013 |
| A Grace Limited | Information & communication | 2014 |
| A H Lifting Solutions Ltd | Transport & logistics | 2019 |
| A J Bull Scaffolding (Southern) Ltd | Construction | 2024 |
| A J Grace Developments Ltd | Construction | 2023 |
| A J L Mechanical Ltd | Construction | 2016 |
| A J Lowe Brickwork Contractor Ltd | Construction | 2010 |
| A J Manning Limited | Professional & scientific | 2023 |
| A J Plastering Ltd | Construction | 2025 |
| A K Precision Engineering Limited | Manufacturing | 2007 |
| A K Sidhu Investments Ltd | Real estate | 2025 |
| A L Lemon Consulting Limited | Professional & scientific | 2023 |
| A L Randall Ltd | Wholesale & retail | 2022 |
| A Lost Weekend Limited | Administrative & support | 2019 |
| A M Alford Transport Ltd | Transport & logistics | 2018 |
| A M G (UK) Limited | Real estate | 2005 |
| A M Hampshire Ltd | Wholesale & retail | 2021 |
| A M Property Sevices Ltd | Construction | 2014 |
| A Mattack Consulting Ltd | Professional & scientific | 2017 |
| A Moor Electrical Limited | Construction | 2013 |
| A Morgan FIC Limited | Real estate | 2024 |
| A O Building Ltd | Construction | 2024 |
| A P T Service Properties Ltd | Real estate | 2025 |
| A P Tools Limited | Manufacturing | 2002 |
| A P Young Ltd | Real estate | 2021 |
| A Peaky Blinder Limited | Other services | 2021 |
| A Perfect Home Ltd | Real estate | 2018 |
| A Plus Clean Ltd | Administrative & support | 2018 |
| A Plus Group of Companies Ltd | Financial services | 2024 |
| A Plus Support Services Ltd | Administrative & support | 2024 |
| A R Allen Limited | Construction | 1993 |
| A R I Trading Limited | Other services | 2025 |
| A R Medical Practitioner Services Limited | Health & social care | 2017 |