| 1 Call Electrical Ltd | Electricians | SO19 2HG | 2023 |
| 1682 Productions Ltd | Builders | SO19 7AS | 2022 |
| 360 Finishes Ltd | Painters & decorators | SO19 2HZ | 2026 |
| 3d Home Solutions Ltd | Builders | SO31 4HJ | 2024 |
| 4d Builders and Design Ltd | Builders | SO31 4RA | 2019 |
| 4lk Cleaning Company Ltd | Cleaners | SO19 4BT | 2026 |
| A & A Head Ltd | Garages & mechanics | SO19 9DY | 2016 |
| A & A Interiors Ltd | Builders | SO19 8LT | 2009 |
| A & D Plumbing and Heating (Hampshire) Ltd | Plumbing & heating | SO31 6LY | 2022 |
| A & M Building & Home Adaption Specialists Ltd | Plumbing & heating | SO19 9EU | 2026 |
| A Class Construction Southern Ltd | Builders | SO19 8NU | 2013 |
| A J Lowe Brickwork Contractor Ltd | Builders | SO31 6UG | 2010 |
| A Moor Electrical Ltd | Electricians | SO19 9DY | 2013 |
| A. Withey Paving Ltd | Builders | SO31 6XA | 2013 |
| A.C.L. Plastering and Drylining Ltd | Plasterers | SO31 1ZT | 1991 |
| A.J.D Interiors Ltd | Builders | SO19 8GP | 2014 |
| A1 Carpets Southern Ltd | Flooring & tiling | SO19 9DX | 2009 |
| Abbey Roofing and Cladding Ltd | Roofers | SO19 1EB | 2011 |
| Abc Heatpumps Ltd | Plumbing & heating | SO31 6GA | 2018 |
| Abigail Laser and Skin Care Ltd | Hair & beauty | SO19 9DZ | 2023 |
| Abigail Nicolaou Aesthetics Ltd | Hair & beauty | SO19 9DZ | 2021 |
| Abj Home Improvements Ltd | Builders | SO31 6PE | 2018 |
| Ace Barber Southampton Ltd | Hair & beauty | SO31 4JT | 2022 |
| Adam Zielinski Construction Ltd | Builders | SO19 6JY | 2017 |
| Adroit Contracting Ltd | Electricians | SO19 7LD | 2019 |
| Ae Racking Installations Ltd | Builders | SO19 9JR | 2015 |
| Agape-Wise Ltd | Cleaners | SO19 6NZ | 2026 |
| Aic Heating and Plumbing Services Ltd | Plumbing & heating | SO31 8LB | 2024 |
| Air Cool Mechanical Services Ltd | Plumbing & heating | SO19 9BA | 2018 |
| Aj Builder Service Ltd | Builders | SO19 7LQ | 2026 |
| Alemco Heating Services Ltd | Builders | SO19 7JP | 2019 |
| Alex Shopfitting Ltd | Builders | SO19 7SB | 2025 |
| Alexandru Dumitru Building Ltd Ltd | Builders | SO19 6PB | 2026 |
| Alford Plumbing & Heating Ltd | Plumbing & heating | SO31 8FZ | 2007 |
| All Floors South Ltd | Flooring & tiling | SO31 8NE | 2023 |
| Allens Barbershop Ltd | Hair & beauty | SO19 8RP | 2023 |
| Alloy Wheel Clinic Ltd | Garages & mechanics | SO31 7ED | 2022 |
| Allstars Mb Ltd | Garages & mechanics | SO31 6WH | 2026 |
| Almond Removals Ltd | Removals | SO19 8PE | 2023 |
| Alt Designer Ltd | Electricians | SO19 9XL | 2025 |
| Ambience Beauty Salon Ltd | Hair & beauty | SO31 7HQ | 2013 |
| Amc Plumbing and Heating Ltd | Plumbing & heating | SO31 9JF | 2026 |
| Amesbury Plumbing & Heating Ltd | Plumbing & heating | SO31 1BB | 2015 |
| Amg Motor Vehicle Services Ltd | Garages & mechanics | SO31 6AF | 2012 |
| Amy'S Hair Design Ltd | Hair & beauty | SO31 9JA | 2026 |
| Andrew Pritchard Services Ltd | Flooring & tiling | SO19 9BA | 2020 |
| Apd Construction & Improvements Ltd | Builders | SO31 1BB | 2019 |
| Apex Pro Carpentry Ltd | Joiners & carpenters | SO31 7GQ | 2020 |
| Apex Roofing & Cladding Solutions Ltd | Cleaners | SO31 7EH | 2026 |
| Applecore Construction & Maintenance Ltd | Builders | SO31 7GH | 2025 |
| Aquanaut Plumbing & Heating Ltd | Plumbing & heating | SO31 7EH | 2011 |
| Aquashell Ltd | Cleaners | SO19 6EN | 2025 |
| Armex Electrical Ltd | Electricians | SO31 8AH | 2017 |
| Arshad Group Ltd | Builders | SO19 2JD | 2021 |
| Art Jointing Ltd | Plasterers | SO19 9UF | 2023 |
| Art of Aesthetics Group Ltd | Hair & beauty | SO19 9BA | 2025 |
| Aspect Electrical South Ltd | Electricians | SO19 9FJ | 2023 |
| Astra Thermal Ltd | Builders | SO31 6RN | 2006 |
| Astute Carpentry & Construction Ltd | Joiners & carpenters | SO19 9JW | 2023 |
| Atc Property Maintenance Ltd | Builders | SO19 7GB | 2010 |
| Aura Electrical Group Ltd | Electricians | SO31 7QB | 2026 |
| Auraline Aesthetics Ltd | Hair & beauty | SO31 1AD | 2025 |
| Aurum Hortis Ltd | Builders | SO31 1EU | 2024 |
| Automated Gate and Door Services Ltd | Builders | SO31 8BW | 1989 |
| Av Electrical & Property Solutions Ltd | Electricians | SO19 9DY | 2020 |
| Averona Group Ltd | Electricians | SO19 9DY | 2022 |
| B & S Salek Ltd | Builders | SO19 6RQ | 2019 |
| B & W Supreme Services Ltd | Builders | SO19 9LR | 2024 |
| B Wyeth Building and Landscaping Solutions Ltd | Builders | SO19 2PH | 2018 |
| Bano Washroom Ltd | Plumbing & heating | SO19 9BP | 2021 |
| Basilisk Joinery Ltd | Joiners & carpenters | SO31 7ES | 2019 |
| Bass and Plumbley Roofing and Cladding Specialist Ltd | Roofers | SO31 7EH | 2026 |
| Bc Venture Ltd | Garages & mechanics | SO19 5JU | 2020 |
| Bcpex Ltd | Joiners & carpenters | SO19 6AT | 2024 |
| Bear Electrical Contractors Ltd | Electricians | SO19 8FB | 2020 |
| Beauty Revival Ltd | Hair & beauty | SO31 7ED | 2012 |
| Beleza Lounge Ltd | Hair & beauty | SO31 9FH | 2019 |
| Bellisima the Salon Ltd | Hair & beauty | SO19 8LQ | 2021 |
| Benjamin1 Installations Ltd | Joiners & carpenters | SO31 7GT | 2024 |
| Bere Forest Tree Services & Logs Ltd | Gardeners & landscapers | SO31 4JW | 2026 |
| Bere Forest Tree Services Ltd | Gardeners & landscapers | SO31 9FR | 2025 |
| Bespoke Carpentry Ltd | Builders | SO31 6SD | 2024 |
| Bespoke Cleans Ltd | Cleaners | SO19 9DY | 2026 |
| Best Car Repair Ltd | Garages & mechanics | SO19 7GQ | 2025 |
| Best Fresh Cleaning Solutions Ltd | Cleaners | SO19 9ES | 2021 |
| Better Space Solutions Ltd | Builders | SO19 0JH | 2024 |
| Birchen Construction Ltd | Builders | SO31 8AW | 2024 |
| Blank Canvas Building Contractors Ltd | Builders | SO31 9HU | 2014 |
| Bldetailing&Mobilevaleting Ltd | Cleaners | SO19 7QS | 2026 |
| Blitz & Co Ltd | Cleaners | SO31 1DE | 2013 |
| Blockbuild.Co.UK Ltd | Builders | SO31 6EP | 2019 |
| Blond. Collaborative Ltd | Hair & beauty | SO31 7BG | 2023 |
| Blue Chip Marine Ltd | Joiners & carpenters | SO31 4NB | 2005 |
| Blue Spark Heating Ltd | Plumbing & heating | SO31 1DS | 2017 |
| Bluesand Ltd | Builders | SO31 4RF | 1993 |
| Blydan Projects Ltd | Builders | SO31 8PA | 2024 |
| Bmg Bathrooms and Plumbing Services Ltd | Plumbing & heating | SO31 6LG | 2014 |
| Bmg Plumbing Services Ltd | Plumbing & heating | SO31 6PZ | 2006 |
| Bms House Conversions Ltd | Builders | SO19 9EG | 2024 |
| Botley Motor Body Repair Ltd | Garages & mechanics | SO31 1BX | 2006 |
| Braeside Property Services Ltd | Plumbing & heating | SO19 7AZ | 2010 |
| Bramdean Developments Ltd | Builders | SO19 9FE | 2007 |
| Brh Services Ltd | Builders | SO31 8DT | 2024 |
| Bridgeroad Group Ltd | Builders | SO31 8AL | 2017 |
| Brook Contract Flooring Ltd | Flooring & tiling | SO31 9HP | 2011 |
| Brooks Construction Solutions Ltd | Builders | SO31 7ED | 2023 |
| Browning Electrical Ltd | Electricians | SO31 8PA | 2023 |
| Bui & Son Ltd | Hair & beauty | SO19 7QT | 2023 |
| C & E Carpentry Ltd | Joiners & carpenters | SO19 9HL | 2026 |
| C & K Plumbing and Heating Ltd | Plumbing & heating | SO31 9JA | 2024 |
| C & K Scaffolding Ltd | Builders | SO31 7EH | 2010 |
| C Bespoke Cleaning Services Ltd. | Cleaners | SO31 7PH | 2025 |
| C D Reilly Construction Ltd | Builders | SO31 7ER | 2025 |
| C Tuning Ltd | Garages & mechanics | SO19 9LN | 2020 |
| C&E Cleaning Services Ltd | Cleaners | SO31 8HB | 2024 |
| C&N Brickwork Ltd | Builders | SO19 9AW | 2024 |
| Ca Contractors Ltd | Builders | SO19 6BB | 2020 |
| Cacap Electrical Ltd | Electricians | SO19 0JF | 2014 |
| Caldav Ltd | Plumbing & heating | SO19 9EL | 2026 |
| Callaway Carpentry Ltd | Joiners & carpenters | SO19 6LN | 2025 |
| Callaway Roofing Ltd | Roofers | SO19 8NY | 2023 |
| Carlos the Cleaner Ltd | Cleaners | SO19 9BB | 2022 |
| Cbrs Estates Ltd | Builders | SO31 9GB | 2012 |
| Cc Floors Ltd | Flooring & tiling | SO19 9BA | 2015 |
| Ccl Cleaning Group Ltd | Cleaners | SO19 9AP | 2007 |
| Centenary Quay Beauty Ltd | Hair & beauty | SO19 9UL | 2025 |
| Cf Electrical Services Ltd | Electricians | SO19 6DJ | 2022 |
| Ch4 Services Ltd | Plumbing & heating | SO19 8GG | 2014 |
| Chadwell Electrical Ltd | Electricians | SO19 6PA | 2025 |
| Chameleon Brick Services Ltd | Builders | SO19 8HD | 2009 |
| Chandler Electrical Services Ltd | Electricians | SO31 7BH | 2003 |
| Chapel Hair @ 80a Ltd | Hair & beauty | SO31 7EH | 2017 |
| Charged Electrical Ltd | Electricians | SO31 9FR | 2020 |
| Chasborn Homes Ltd | Builders | SO31 9HZ | 2025 |
| Chilor Group Ltd | Plumbing & heating | SO19 9HX | 2020 |
| Chloe Marketta Cosmetics Ltd | Hair & beauty | SO31 4RF | 2022 |
| Circuit Hype Electrical Ltd | Electricians | SO31 7EH | 2022 |
| Citadel Civil Engineering Consultancy Ltd | Builders | SO31 6NT | 2015 |
| City Glass Ltd. | Glaziers | SO19 9GA | 1999 |
| Claire Marie Hair Studio Ltd | Hair & beauty | SO31 9HX | 2026 |
| Clarissas Ltd | Hair & beauty | SO31 7PH | 2026 |
| Clean Club Services Ltd | Cleaners | SO19 7NR | 2021 |
| Cleaning Operations UK Ltd | Cleaners | SO31 7GA | 2013 |
| Cleaning Solutions Made Simple Ltd | Cleaners | SO31 6LX | 2019 |
| Clogged Ltd | Cleaners | SO19 9DY | 2024 |
| Cloud Nine Hq Ltd | Hair & beauty | SO31 8PG | 2020 |
| Coast and Country Fencing Ltd | Builders | SO19 2DY | 2024 |
| Coastline Carpentry & Joinery Ltd | Builders | SO19 0SX | 2017 |
| Coastline Facilities Support Services Ltd | Builders | SO31 7GW | 2018 |
| Combi-Nation Commercial Ltd | Appliance repair | SO19 9AS | 2011 |