| 1ST Heartrace Ltd | Health & social care | 2022 |
| 1ST in Line Cleaning Services Limited | Administrative & support | 2018 |
| 1ST Klas Cleaning Services Limited | Administrative & support | 2013 |
| 1ST Saviour Finance Limited | Extraterritorial | 1999 |
| 1UMMAH Your Community Ltd | Other services | 2022 |
| 2 & 2A Wynter Road Southampton Limited | Extraterritorial | 2002 |
| 2 Burston Road Limited | Real estate | 2022 |
| 2 Walk in Ltd | Construction | 2021 |
| 2-24 Foxwood Close Freehold Limited | Households | 2021 |
| 2018 Limited | | 2012 |
| 2020 Secretarial Services Limited | Administrative & support | 2026 |
| 2025 Soton Grill House Limited | Hospitality | 2025 |
| 20SS Management Limited | Households | 2014 |
| 21 SIX TPC Limited | Other services | 2026 |
| 21 Sixty SIX Ltd | Real estate | 2021 |
| 21 Stanhope Road N6 Freehold Limited | Real estate | 2009 |
| 21-22 Hanover Buildings Management Limited | Households | 2017 |
| 22 Minds Limited | Information & communication | 1999 |
| 220230 Limited | Real estate | 2016 |
| 221B Baker Street Management Services Ltd | Information & communication | 2018 |
| 225 Ltd | Wholesale & retail | 2022 |
| 23 City Road Limited | Hospitality | 2024 |
| 23 Elgin Road Flat Management Ltd | Households | 2026 |
| 23 Sutherland Street (Management Company) Limited | Households | 2004 |
| 24 Acoustics Capital Investments Limited | Real estate | 2017 |
| 24 Acoustics Limited | Professional & scientific | 2004 |
| 24 Carrot Films Limited | Information & communication | 2001 |
| 24 Cures Limited | Manufacturing | 2018 |
| 24 Hazeleigh Avenue Management Limited | Real estate | 2012 |
| 24/7 Electrics Limited | Construction | 2004 |
| 24/7 Vehicle Assist Limited | Extraterritorial | 2018 |
| 246 Warsash Road Management Limited | Hospitality | 2006 |
| 247 Events Management Ltd | Professional & scientific | 2025 |
| 24TEN Consulting Limited | Professional & scientific | 2024 |
| 25 Christchurch Road Winchester Limited | Hospitality | 2005 |
| 25 Copperfields Ltd | Real estate | 2025 |
| 25 Eastleigh Limited | Hospitality | 2023 |
| 25-36 Kings Well Court (Seaford) Management Co. Ltd | Households | 1998 |
| 270 Vision Ltd | Information & communication | 2011 |
| 274 Winchester Road Property Management Company Limited | Households | 2025 |
| 28-34 Darlington Gardens Southampton Management Company Limited | Households | 2018 |
| 281 Holmesdale Freehold Company Limited | Households | 2017 |
| 284 Technologies Limited | Information & communication | 2021 |
| 29 the Avenue Limited | Households | 1997 |
| 29-67 Carpathia Drive RTM Company Ltd | Households | 2022 |
| 293/295 Winchester Road, Shirley Limited | Households | 1988 |
| 2A'S Retail Limited | Wholesale & retail | 2022 |
| 2C Investments Limited | Professional & scientific | 2018 |
| 2D Consultant Services Ltd | Professional & scientific | 2007 |
| 2HEARING Limited | Wholesale & retail | 2015 |
| 2IC Limited | Information & communication | 2010 |
| 2M Design & Print Ltd | Manufacturing | 2011 |
| 2MA Ltd | Arts & recreation | 2006 |
| 2ND Floor Designs Ltd | Information & communication | 2010 |
| 2ND So'Ton BB CIC | Other services | 2025 |
| 3 - 7 Bonnington Square Freehold Limited | Households | 2015 |
| 3 Bar Ltd | Wholesale & retail | 2018 |
| 3 Brothers Fencing & Decking Ltd | Administrative & support | 2025 |
| 3 Brothers Fencing Ltd | Administrative & support | 2025 |
| 3 Counties Civil Engineering Limited | Construction | 2000 |
| 3 Futures Developments Ltd | Construction | 2020 |
| 3 Futures Homes Ltd | Real estate | 2021 |
| 3 Futures Ltd | Construction | 2019 |
| 3 G’S Inns Ltd | Hospitality | 2019 |
| 3 in One 3 Ltd | Wholesale & retail | 2022 |
| 3 Little Steps Ltd | Professional & scientific | 2010 |
| 3 PIN Electrical Limited | Construction | 2012 |
| 3 Stars Homes Limited | Construction | 2024 |
| 3-6 Hambert Way RTM Company Ltd | Households | 2016 |
| 30 Connaught Avenue Limited | Households | 1989 |
| 300.LONDON Limited | Professional & scientific | 2020 |
| 303 Bikes Ltd | Manufacturing | 2024 |
| 30BUNIATRANS Ltd | Transport & logistics | 2025 |
| 31 Mitcham Lane Residents Association Limited | Households | 1975 |
| 31 North Group Ltd. | Arts & recreation | 2018 |
| 321 MSM Limited | Hospitality | 2024 |
| 33 Croham Road Residents Limited | Households | 2008 |
| 330 Bitterne Road Management Company Limited | Real estate | 2006 |
| 34 Connaught Avenue (Plymouth) Limited | Households | 2000 |
| 343 Security Ltd | Information & communication | 2026 |
| 35 the Hundred Management Company Limited | Extraterritorial | 2014 |
| 35/37 Croham Road Residents Limited | Households | 2006 |
| 352 Winchester Road Residents Limited | Households | 1995 |
| 360 Degree Sports Coaching CIC | Arts & recreation | 2018 |
| 360 DSC Limited | Education | 2022 |
| 360 Plant Hire Ltd | Administrative & support | 2019 |
| 360 Plant Services Limited | Manufacturing | 2015 |
| 365 Accounts Ltd | Professional & scientific | 2019 |
| 365 Building Services Limited | Construction | 2018 |
| 365 Consultancy Solutions Ltd | Administrative & support | 2017 |
| 365 Delivery Ltd | Transport & logistics | 2025 |
| 365 Enhanced Limited | Health & social care | 2025 |
| 365 Fitness HH Ltd | Arts & recreation | 2021 |
| 365 Investment Management Limited | Professional & scientific | 2019 |
| 365 Nutrition Limited | Wholesale & retail | 2023 |
| 365 Property Holdings Limited | Real estate | 2020 |
| 365 Secure IT Limited | Financial services | 2022 |
| 37 Ambleside Avenue RTM Company Limited | Households | 2024 |
| 37 Brentwood High Street Ltd | Real estate | 2023 |
| 3C Capital Ltd | Information & communication | 2022 |