| Wood Cable Engineering Limited | Information & communication | 2021 |
| Wood Family Property Ltd | Real estate | 2024 |
| Woodall Assets Management Ltd | Other services | 2004 |
| Woodall Fastening Systems Ltd | Wholesale & retail | 2003 |
| Woodcote Homes (Haydon Farm) Ltd | Real estate | 2018 |
| Woodcote Homes Ltd | Real estate | 2018 |
| Woodcote Land Ltd | Financial services | 2018 |
| Woodfield Homes Limited | Other services | 2018 |
| Woodford Engineering Limited | Manufacturing | 2004 |
| Woodglen Limited | Information & communication | 2024 |
| Woodhill School Holdings Limited | Financial services | 2020 |
| Woodhouse Developments (Amesbury) Limited | Construction | 2021 |
| Woodhouse Tenants Limited | Households | 2011 |
| Woodhousehvacsupplies Ltd | Energy | 2025 |
| Woodiams Ltd | Hospitality | 2023 |
| Woodies (Southern) Limited | Hospitality | 2020 |
| Woodies in Wickham Ltd | Hospitality | 2025 |
| Woodland Designs Limited | Construction | 2004 |
| Woodland Gardens Road Management Ltd | Households | 2022 |
| Woodland Place RTM Company Limited | Households | 2004 |
| Woodlands (Bassett) Management Limited | Households | 2010 |
| Woodlands Developments (Southern) Ltd | Construction | 2012 |
| Woodlands Financial Planning Ltd | Financial services | 2022 |
| Woodlands Grange (Rownhams) Limited | Households | 2003 |
| Woodlands Real Estate Ltd | Real estate | 2023 |
| Woodlands Window Cleaning Ltd | Administrative & support | 2025 |
| Woodley Investments Limited | Real estate | 2000 |
| Woodpecker CNC & Laser Limited | Manufacturing | 2019 |
| Woodpecker Self Storage Ltd | Transport & logistics | 2021 |
| Woodrow Scientific Limited | Professional & scientific | 2012 |
| Woodruff Management Company Limited | Administrative & support | 1992 |
| Woods Business Consultants Limited | Administrative & support | 2014 |
| Woodshunt Ltd | Administrative & support | 2024 |
| Woodside (Portswood) Residents Association Limited | Households | 1979 |
| Woodslot Property Management Limited | Households | 1991 |
| Woodsticks Ltd | Information & communication | 2023 |
| Woodvoice Carpentry Ltd | Construction | 2025 |
| Woodward Customs Consultancy Ltd | Professional & scientific | 2025 |
| Woofa Ltd | Other services | 2022 |
| Woolston Auto Engineering Limited | Wholesale & retail | 1999 |
| Woolston Barber Shop Ltd | Other services | 2026 |
| Woolston Fish Bar Limited | Hospitality | 2022 |
| Woolston Global Limited | Extraterritorial | 2011 |
| Woolston Mini Market Ltd | Wholesale & retail | 2024 |
| Woolston Petshop Ltd | Wholesale & retail | 2018 |
| Woolston Superstore Ltd | Wholesale & retail | 2024 |
| Woolwich Transport & Trailer Services Limited | Transport & logistics | 2015 |
| Woosabi Limited | Hospitality | 2024 |
| Work Honors Ltd | Information & communication | 2020 |
| Work in Progress Recruitment Limited | Administrative & support | 2021 |
| Work IT CIC | Health & social care | 2025 |
| Workadvisor Limited | Information & communication | 2015 |
| Workboat Designs Limited | Professional & scientific | 2026 |
| Workbook Pro Ltd | Information & communication | 2024 |
| Workforce Development Training Limited | Administrative & support | 2017 |
| Workforce Resourcing Cleaning Services Limited | Administrative & support | 2025 |
| Workforce Resourcing Construction Services Limited | Construction | 2025 |
| Workforce Resourcing Group Limited | Financial services | 2025 |
| Workforce Resourcing Hospitality Services Limited | Hospitality | 2024 |
| Workforce Resourcing Limited | Administrative & support | 2016 |
| Workforce Resourcing Security Services Limited | Administrative & support | 2024 |
| Workforce Resourcing Solutions Limited | Administrative & support | 2025 |
| Working Business Limited | Information & communication | 2019 |
| Working Feedback Healthcare Limited | Administrative & support | 2022 |
| Working Feedback Limited | Extraterritorial | 2012 |
| Workmobility Limited | Health & social care | 2005 |
| Workplace Drugs and Alcohol Testing Ltd | Professional & scientific | 2019 |
| Workplace EAR Care Limited | Health & social care | 2024 |
| Workplace Solutions Limited | Wholesale & retail | 2012 |
| Worktalk Learning | Education | 1997 |
| World Class Apps Limited | Information & communication | 2012 |
| World Click Ltd | Wholesale & retail | 2025 |
| World Fine Cash & Carry Ltd | Wholesale & retail | 2019 |
| World Heritage Archive Ltd | Extraterritorial | 2011 |
| World in a Box Limited | Extraterritorial | 1997 |
| World Kgotso Limited | Administrative & support | 2025 |
| World Marine Inc Limited | Professional & scientific | 2022 |
| World Powerboat Events Ltd | Arts & recreation | 2025 |
| World Youth Sailing Trust | Professional & scientific | 2008 |
| Worldfoot Ltd | Professional & scientific | 2019 |
| Worldlink Education Limited | Education | 2005 |
| Worldship Ltd | Transport & logistics | 2025 |
| WORLDWARD2 Ltd | Administrative & support | 2020 |
| Worldwide Networks Group Ltd | Information & communication | 2019 |
| Worrall Inn Ltd | Hospitality | 2024 |
| Worthy Estates Ltd | Real estate | 2022 |
| Worthy's GEM Limited | Other services | 2011 |
| WOT MA Like Ltd | Wholesale & retail | 2013 |
| Wotpot Systems Ltd | Administrative & support | 2019 |
| WOW Cupcakes Ltd | Manufacturing | 2010 |
| WOW Your Crowd Ltd | Information & communication | 2003 |
| Wowbite Ltd | Hospitality | 2025 |
| WP Services Holdings Limited | Administrative & support | 2017 |
| Wpr.Lgv Ltd | Transport & logistics | 2015 |
| Wrapped UP Studios Ltd | Manufacturing | 2026 |
| Wrapshop Limited | Wholesale & retail | 2022 |
| Wray's Vehicle Body Repairs Ltd | Wholesale & retail | 2026 |
| WRC Services Ltd | Administrative & support | 2015 |
| Wrekin Moving and Storage Limited | Professional & scientific | 2007 |
| Wren Holdco Limited | Financial services | 2026 |