| Willows Accountancy Limited | Professional & scientific | 2006 |
| Wilstech Engineering Ltd | Manufacturing | 2016 |
| WIN Logistics Group Limited | Professional & scientific | 2018 |
| Windmill Service Station Limited | Wholesale & retail | 1989 |
| Windupcentury Ltd | Wholesale & retail | 2025 |
| Wine Architecture Ltd | Professional & scientific | 2020 |
| Winnow Business Improvement Services Limited | Professional & scientific | 2006 |
| Wiseman Interpreting Ltd | Professional & scientific | 2025 |
| WIT & Grit Limited | Professional & scientific | 2025 |
| WKD Promotions Limited | Arts & recreation | 2015 |
| WLL 2020 Limited | Real estate | 2020 |
| WM Poptops Limited | Wholesale & retail | 2021 |
| WM Storage Ltd | Construction | 2015 |
| Wmsd Ltd | Arts & recreation | 2012 |
| Woodandwood Ltd | Real estate | 2019 |
| Woodfield Building Services (Staffs.) Limited | Construction | 1999 |
| Woodhouse Playgrounds Limited | Manufacturing | 2025 |
| Woodland Court (Hednesford) Management Company Limited | Professional & scientific | 2006 |
| Wordy Bird Limited | Information & communication | 2022 |
| Workforce World Ltd | Administrative & support | 2018 |
| Works Components Limited | Manufacturing | 2017 |
| World Crown Green Bowls Limited | Arts & recreation | 2012 |
| Worldwide Move Management Limited | Transport & logistics | 2008 |
| WPF Electrical & Construction Ltd | Construction | 2026 |
| WPH Westwood Plumbing & Heating Limited | Construction | 2018 |
| Wrapper Stew Ltd | Professional & scientific | 2025 |
| WS11 Fire Protection Limited | Construction | 2022 |
| WSHOALH1RF Ltd | Hospitality | 2021 |
| WTC Events Ltd | Hospitality | 2023 |
| Wuffable Ltd | Manufacturing | 2022 |
| Wyngnut Ltd | Wholesale & retail | 2019 |
| Wyrley (UK) Ltd | Arts & recreation | 2006 |
| Wyrley Consultancy Limited | Professional & scientific | 2016 |
| Wyrley Music & Promotions Limited | Arts & recreation | 2019 |
| X P Tree Services Limited | Professional & scientific | 2004 |
| X-Y Ceilings & Partitions Limited | Construction | 2022 |
| X66 Joinery Ltd | Construction | 2024 |
| Xavier Edese Limited | Arts & recreation | 2014 |
| Xhersize Ltd | Arts & recreation | 2018 |
| Xpanda Ltd | Manufacturing | 2022 |
| Xpel Environmental Services Limited | Agriculture & fishing | 2006 |
| Xpress Plastics Ltd | Manufacturing | 2013 |
| Y Move Properties Limited | Real estate | 2002 |
| Yadanar Limited | Health & social care | 2004 |
| Yamas Consultancy Services Limited | Real estate | 2003 |
| Yazzoo Personalised Clothing Limited | Wholesale & retail | 2011 |
| Yellow Rose Financial Services Limited | Financial services | 2023 |
| YG Energy Limited | Administrative & support | 2023 |
| Yghp Limited | Manufacturing | 2019 |
| Ygmaintenance Ltd | Other services | 2021 |
| Yogurt Top Media Limited | Administrative & support | 2014 |
| YOU Know It's Write Ltd | Information & communication | 2024 |
| Your House Construction Limited | Construction | 2019 |
| Your Style Windows Limited | Construction | 2023 |
| Your Subs Ltd | Hospitality | 2015 |
| Youtopia Aesthetics Ltd | Other services | 2018 |
| YS Living Co. Limited | Real estate | 2025 |
| Z R Developments Limited | Construction | 2023 |
| Zambezi Basket Ltd | Wholesale & retail | 2025 |
| Zela Records Limited | Information & communication | 2022 |
| Zeno Contracts Limited | Construction | 2023 |
| Zephyr Technical Services Ltd | Professional & scientific | 2017 |
| Zeus Roofline Group Limited | Construction | 2020 |
| Ziginvest Ltd | Real estate | 2019 |
| Zora Print Ltd | Manufacturing | 2025 |
| Zozay Estates Ltd | Real estate | 2024 |
| Zunsport Limited | Manufacturing | 2007 |