| William King Limited | Manufacturing | 1951 |
| Willis Pest Control Ltd | Agriculture & fishing | 2019 |
| Window & Building Maintenance Ltd | Construction | 2020 |
| Window Bakery Limited | Hospitality | 2020 |
| Wingsta Limited | Hospitality | 2025 |
| Winter Green Consulting Limited | Professional & scientific | 2025 |
| Wintergreen Global Ltd | Administrative & support | 2024 |
| Wired Labs Ltd | Information & communication | 2026 |
| Wireless Textiles Limited | Wholesale & retail | 2013 |
| Wise Chinese Limited | Hospitality | 2019 |
| Wise Ways LOG Ltd | Transport & logistics | 2026 |
| Wiseprint Solutions Ltd | Manufacturing | 2025 |
| Wishing Well Mobility Limited | Wholesale & retail | 2013 |
| Wlat Limited | Wholesale & retail | 2024 |
| Wmhi Ltd | Construction | 2022 |
| Wmpd Ltd | Construction | 2020 |
| Wojciech Nieznaj Ltd | Construction | 2019 |
| Wonder Balloons (Midlands) Limited | Wholesale & retail | 2020 |
| Wonders Fabrications Limited | Manufacturing | 2025 |
| Woodcraft Contract Furniture Ltd | Manufacturing | 2018 |
| Woodland Services Limited | Construction | 2023 |
| Wookash Ltd | Transport & logistics | 2025 |
| Work IT Resourcing Ltd | Information & communication | 2017 |
| Workproof Ltd | Professional & scientific | 2026 |
| Workwear Clearance Ltd | Manufacturing | 2016 |
| World of MIA Ltd | Wholesale & retail | 2017 |
| World Pass Limited | Transport & logistics | 2024 |
| Worldwide Global Imports Ltd | Wholesale & retail | 2021 |
| Wrights Plastics Group Limited | Financial services | 2022 |
| Wtrans Limited | Wholesale & retail | 2013 |
| Www.Atlasforklift.Co.Uk.Ltd. | Manufacturing | 1983 |
| Wyndley Grange Limited | Other services | 1989 |
| X Catalogue Limited | Wholesale & retail | 2020 |
| X Edge Ltd | Manufacturing | 2024 |
| X Future Technology (UK) Co. Limited | Other services | 2026 |
| Xpand Core Ltd | Professional & scientific | 2025 |
| Xpress GAS Services Ltd | Construction | 2023 |
| Xpress Solution Global Limited | Wholesale & retail | 2016 |
| Xtanzer ENT Limited | Manufacturing | 2025 |
| Y G Entertainment Ltd | Information & communication | 2025 |
| Y221 Limited | Real estate | 2022 |
| Yaaba Vegan Hub Ltd | Manufacturing | 2021 |
| Yahweh Housing Ltd | Hospitality | 2023 |
| Yalokin Ltd | Transport & logistics | 2020 |
| YAM Car Hire Limited | Wholesale & retail | 2023 |
| Yasin Transport Limited | Transport & logistics | 2016 |
| Yass Construction Ltd | Construction | 2024 |
| Yemeni Community Association in Sandwell Limited | Other services | 2004 |
| Yeomans Brickwork Ltd | Real estate | 2009 |
| Yeomans Properties Ltd | Real estate | 2019 |
| YEW Tree Banqueting Ltd | Real estate | 2022 |
| Ynwa Pizza Ltd | Wholesale & retail | 2023 |
| Yogi Hair Studio Ltd | Other services | 2024 |
| Your Digital Presence Ltd | Professional & scientific | 2019 |
| Your Donation Ltd | Wholesale & retail | 2017 |
| Your Property Ventures Limited | Real estate | 2025 |
| YRS Rentals Limited | Administrative & support | 2025 |
| Yukari Limited | Hospitality | 2025 |
| YUS415 Limited | Health & social care | 2021 |
| Z& J Maan Ltd | Manufacturing | 2025 |
| Z.M.R. Limited | Manufacturing | 2000 |
| Z4L Ltd | Education | 2023 |
| ZAM ZAM Soft Drink Ltd | Wholesale & retail | 2024 |
| Zamada Ltd | Hospitality | 2025 |
| Zamubian Locs Studio Ltd | Other services | 2021 |
| Zamurad Limited | Real estate | 2017 |
| Zana's Tyre & Tracking Services Ltd | Wholesale & retail | 2024 |
| ZAP Shutters Limited | Construction | 2017 |
| Zaroon Ltd | Wholesale & retail | 2020 |
| Zavenra Group Ltd | Professional & scientific | 2026 |
| Zawsze Tatuj Ltd | Wholesale & retail | 2019 |
| Zawsze Tatuj Store Ltd | Wholesale & retail | 2024 |
| Zebra Transportation Limited | Transport & logistics | 2017 |
| Zeemide Estate Ltd | Real estate | 2022 |
| Zentrix Logistics Group Ltd | Transport & logistics | 2026 |
| Zerogravityco Limited | Information & communication | 2016 |
| Zghereaconstruction Ltd | Construction | 2023 |
| ZH Investment Ltd | Financial services | 2023 |
| Zoanna Fabrics Ltd | Wholesale & retail | 2019 |
| Zoerhema Care Limited | Health & social care | 2019 |
| Zohaib Limited | Wholesale & retail | 2020 |
| ZORA22 Ltd | Transport & logistics | 2025 |
| Zoraa Transport Ltd | Transport & logistics | 2024 |
| Zorro Capital Limited | Construction | 2022 |
| Zunde Ltd | Information & communication | 2026 |
| ZW Cars Ltd | Wholesale & retail | 2026 |
| Zwin & Sisters Estates Ltd | Real estate | 2026 |