| Worthing Mobiles Phones Accessories Ltd | Wholesale & retail | 2019 |
| Worthing Musical Productions Limited | Professional & scientific | 1988 |
| Worthing Nails & Beauty Ltd | Other services | 2024 |
| Worthing Osteopathic Clinic Limited | Health & social care | 2005 |
| Worthing Philharmonic Orchestra Limited | Arts & recreation | 1997 |
| Worthing Physiotherapy & Sports Injury Clinic Limited | Other services | 2014 |
| Worthing Plumbing & Heating Limited | Construction | 2011 |
| Worthing Pride Ltd | Arts & recreation | 2019 |
| Worthing Removals and Storage Co. (P & H) Limited | Transport & logistics | 1975 |
| Worthing Rest Ltd | Hospitality | 2012 |
| Worthing Seafront RTM Company Limited | Administrative & support | 2017 |
| Worthing Store Limited | Wholesale & retail | 2025 |
| Worthing Theatres & Museum (Trading) Limited | Arts & recreation | 2019 |
| Worthing Thunder Basketball Club Limited | Arts & recreation | 2023 |
| Worthing Thunder CIC | Arts & recreation | 2011 |
| Worthing Town Centre Business Improvement District Community Interest Company | Administrative & support | 2009 |
| Worthing Town Football Club Limited | Arts & recreation | 2012 |
| Worthing United Youth FC CIC | Arts & recreation | 2024 |
| Worthing Windows (Sussex) Limited | Construction | 1995 |
| Worthing Women's AID | Health & social care | 2003 |
| Worthington Limited | Hospitality | 2018 |
| Worthy Paradise Ltd | Hospitality | 2020 |
| WOW Hampers Limited | Extraterritorial | 2018 |
| WPH Building Services Limited | Construction | 2025 |
| WQ SUB Limited | Hospitality | 2019 |
| Wren Roofing Services Limited | Construction | 2012 |
| Wright Family Properties Limited | Financial services | 2025 |
| Write for Pharma Ltd | Information & communication | 2015 |
| Wrld Ctrl Ltd | Wholesale & retail | 2023 |
| WSX1 Specialist Housing Ltd | Real estate | 2025 |
| WSX2 Specialist Housing Ltd | Real estate | 2025 |
| WVK Property Limited | Construction | 2019 |
| WW Property Maintenance Limited | Construction | 2011 |
| WX Group Limited | Financial services | 2023 |
| Wykeham Court Limited | Households | 1999 |
| Wyre Plaster Mouldings Limited | Construction | 2018 |
| X4R Limited | Financial services | 2019 |
| Xavier Young Ltd | Professional & scientific | 2007 |
| XBG Plumbing & Heating Ltd | Construction | 2003 |
| Xenfm Ltd | Information & communication | 2019 |
| Xikari Limited | Real estate | 2025 |
| Xiomara Limited | Other services | 2021 |
| Xlab Crossfit Limited | Arts & recreation | 2020 |
| Xperiology Ltd | Administrative & support | 2009 |
| XPS Hire Services Limited | Administrative & support | 2000 |
| Xsicute Limited | Information & communication | 2019 |
| Xtaline Ltd. | Professional & scientific | 2019 |
| Xtend Global | Other services | 2011 |
| Xtra Mile Entertainment Group Limited | Arts & recreation | 2008 |
| Xtra Mile Recordings Ltd | Arts & recreation | 2004 |
| Xtrasyncs Ltd | Information & communication | 2022 |
| Xtreme Tyres & Autocare Limited | Wholesale & retail | 2022 |
| Y T Designs Ltd | Manufacturing | 2010 |
| Yachtconnected Limited | Arts & recreation | 2026 |
| YAM International Ltd | Wholesale & retail | 2025 |
| Yangs Home Rental LLP | | 2024 |
| Yard Shed LLP | | 2021 |
| Yardstick Property Limited | Households | 2020 |
| Yarrow East Limited | Health & social care | 2014 |
| Yarrowside Ltd | Health & social care | 2019 |
| Yasminzarahussain Limited | Professional & scientific | 2021 |
| Yates & Co Properties Ltd | Real estate | 2022 |
| Yazbek Medical Ltd | Health & social care | 2025 |
| Yeastie Boys Pizza Company Ltd | Hospitality | 2026 |
| Yellow Glasses Limited | Professional & scientific | 2021 |
| Yellow Shop 123 Ltd | Wholesale & retail | 2025 |
| Yellow Shop Worthing Limited | Wholesale & retail | 2025 |
| Yemaya Ltd | Hospitality | 2022 |
| Yeoman Way Management Company Limited | Households | 2006 |
| Yeomans (Cosham) Limited | Wholesale & retail | 2024 |
| Yeomans Limited | Wholesale & retail | 1985 |
| YES Residential Ltd | Real estate | 2022 |
| YES Society Limited | Administrative & support | 2014 |
| YES Transport Services Limited | Professional & scientific | 2013 |
| YES YOU CAN Gym Group Ltd | Arts & recreation | 2023 |
| Yes/No Productions Limited | Arts & recreation | 1991 |
| Yinson Renewables (UK) Limited | Professional & scientific | 2019 |
| Yireh Holdings Ltd | Financial services | 2026 |
| YOU Search and Select Limited | Administrative & support | 2016 |
| Youfirst Chairs Limited | Wholesale & retail | 2021 |
| Youfirst Group Ltd | Other services | 2023 |
| Young Explorers Goring Limited | Education | 2017 |
| Young Sussex Ltd | Health & social care | 2019 |
| Young's Civil Engineering Limited | Construction | 1999 |
| Your Australian Business Ltd | Other services | 2011 |
| Your Brand Cover Limited | Other services | 2022 |
| Your Business Coach Limited | Administrative & support | 2016 |
| Your Conscious Health Limited | Extraterritorial | 2025 |
| Your Cover Holdings Limited | Financial services | 2022 |
| Your Enlightened Potential Ltd | Education | 2022 |
| Your Friend Community Interest Company | Administrative & support | 2025 |
| Your House Carpentry & Building Limited | Construction | 2014 |
| Your Instant Replay Ltd | Information & communication | 2024 |
| Yourcommonhold Limited | Real estate | 2022 |
| Yourmastermechanic Ltd | Wholesale & retail | 2025 |
| YR Chile Holding Limited | Financial services | 2022 |
| YR Colombia Limited | Financial services | 2023 |
| YR Peru Limited | Financial services | 2022 |
| YUG Creations Ltd | Arts & recreation | 2006 |
| Yukon Reserves Ltd | Administrative & support | 2016 |