| Wavelength Holdings Group Limited | Financial services | 2020 |
| Wavelength Stageco Limited | Arts & recreation | 2005 |
| Waylaid Limited | Construction | 1981 |
| Wayne J Barber Ltd | Hospitality | 2021 |
| Wazuha Ltd | Wholesale & retail | 2025 |
| WB Timber Innovations Limited | Construction | 2011 |
| Wbti Ltd | Professional & scientific | 2014 |
| WD and NM Willison Ltd | Agriculture & fishing | 2013 |
| WE ARE Adventure Ltd | Administrative & support | 2020 |
| WE ARE Fusion Limited | Administrative & support | 2016 |
| WE ARE Gmys. Limited | Hospitality | 2022 |
| WE Deliver Projects Limited | Professional & scientific | 2020 |
| Weatherguard H P M (Midlands) Ltd | Construction | 2017 |
| Weatheroak Hill Brewery Limited | Manufacturing | 2008 |
| Weaver Developments Ltd | Construction | 2026 |
| Webb Print & Display Holdings Limited | Manufacturing | 2021 |
| Webheath Services Ltd | Construction | 2017 |
| Wecovi Limited | Wholesale & retail | 2006 |
| Wedgeitsolutions Limited | Information & communication | 2013 |
| WEG (UK) Ltd | Wholesale & retail | 1996 |
| Weigh SOL Limited | Manufacturing | 2008 |
| Weightlifting House Limited | Wholesale & retail | 2018 |
| Welbeck Interiors Holdings Limited | Financial services | 2016 |
| Welbeck Interiors Limited | Construction | 2013 |
| Welding & Industrial Supplies & Equipment Limited | Wholesale & retail | 2013 |
| Weller Wheels Limited | Manufacturing | 2009 |
| Wendy House Properties Ltd | Real estate | 2006 |
| West Midland Motorhomes Limited | Wholesale & retail | 2019 |
| West Midlands Homes Limited | Financial services | 2017 |
| West Midlands Landscapes Ltd | Administrative & support | 2009 |
| West Oils Environmental Limited | Water & waste | 2003 |
| West Point Construction Limited | Construction | 1991 |
| West Point Plant Limited | Construction | 1997 |
| West Point UK Holdings Limited | Professional & scientific | 2015 |
| Westall Court Limited | Hospitality | 2014 |
| Westall Park Limited | Other services | 1997 |
| Westmoreland Tech Holding Limited | Financial services | 2020 |
| Westridge Consultancy Ltd | Real estate | 2021 |
| Westward Plumbing Solutions Ltd | Construction | 2026 |
| WGB Consultancy Ltd | Other services | 2020 |
| Wheeler Capital Group Ltd | Real estate | 2021 |
| Wheelies Direct Limited | Professional & scientific | 2013 |
| Wheelmania Limited | Wholesale & retail | 2009 |
| Where's That Bear Limited | Manufacturing | 2013 |
| Whetstone Contractors Limited | Construction | 2021 |
| WHF Lighting Limited | Arts & recreation | 2015 |
| Whisk & Wonder Press Ltd | Manufacturing | 2025 |
| White & Co Projects Ltd | Construction | 2026 |
| White Swan (HIA) Limited | Hospitality | 2025 |
| White's Foodservice Equipment Limited | Wholesale & retail | 2010 |
| White's Group (Holdings) Limited | Financial services | 2019 |
| White-Glove Helping Hands Ltd | Administrative & support | 2024 |
| Whitecross Street TV Limited | Arts & recreation | 2014 |
| Whitehill Capital Limited | Professional & scientific | 2023 |
| Whitehouse Flexible Tubing Limited | Manufacturing | 2024 |
| Whitehouse Group Holdings Limited | Manufacturing | 1960 |
| Whiteman's Advisory Limited | Professional & scientific | 2025 |
| Whiteman's Fine Art & Antiques Limited | Wholesale & retail | 2018 |
| Whiteman's Group Limited | Financial services | 2025 |
| Whitemoor Manufacturing Limited | Professional & scientific | 2010 |
| Whitmarsh Property Services Ltd | Real estate | 2020 |
| Whitney Engineering Limited | Wholesale & retail | 1993 |
| Whittlecroft Limited | Wholesale & retail | 2025 |
| WHY NOT Management Ltd | Hospitality | 2018 |
| WI Redditch Limited | Hospitality | 2025 |
| Wider Ambition Ltd | Education | 2019 |
| Wider Plan Ltd | Administrative & support | 2004 |
| Wideroad Ltd | Transport & logistics | 2018 |
| Wifi Solutions (UK) Limited | Information & communication | 2014 |
| Wigpool Holdings Limited | Financial services | 2017 |
| Wigpool Investments Limited | Financial services | 2023 |
| Wigpool Limited | Manufacturing | 1973 |
| Wildfyre Investments Limited | Real estate | 2020 |
| Wilkes Homes Ltd | Real estate | 2024 |
| Wilkhu Investments Limited | Extraterritorial | 2022 |
| Williams Ceilings and Partitions Ltd | Construction | 2019 |
| Williams Harfield Group Holdings Limited | Financial services | 2018 |
| Williams Harfield Sports Limited | Administrative & support | 2010 |
| Williams Harfield Sports Sponsorship Limited | Professional & scientific | 2022 |
| Williams OIL & GAS Services Limited | Construction | 2023 |
| Williamson Contractors Limited | Construction | 2017 |
| Willo Holdings Limited | Financial services | 2025 |
| Willow Price Limited | Real estate | 2024 |
| Willow Technologies Limited | Manufacturing | 1989 |
| Willwood Construction Ltd | Construction | 2024 |
| Willwood Contractors Ltd | Construction | 2024 |
| Wilson Brook Consulting Limited | Administrative & support | 2018 |
| Winchcombe Ltd | Information & communication | 2024 |
| Windmill Pre-School Midlands Limited | Education | 2004 |
| Winyates & PO Ltd | Wholesale & retail | 2019 |
| Winyates Playgroup Limited | Health & social care | 2007 |
| Winyates Windows Limited | Construction | 2025 |
| Wise Car Repairs Ltd | Wholesale & retail | 2025 |
| Wisebuddah Jingles and Music Imaging Limited | Information & communication | 2006 |
| Wisebuddah Jingles London Limited | Financial services | 2021 |
| Wiseman Threading Tools Limited | Manufacturing | 1992 |
| Wiser Mortgage Advice Limited | Financial services | 2021 |
| Without the H Ltd | Information & communication | 2024 |
| Without the Wick Ltd | Wholesale & retail | 2021 |
| Wizard Sleeve Investments Ltd | Administrative & support | 2016 |