| WJT Estates Ltd | Administrative & support | 2014 |
| WL Logistics Limited | Professional & scientific | 2024 |
| WL Marketing Limited | Professional & scientific | 2006 |
| WLA Executive Cleaning & Multi-Services Ltd | Wholesale & retail | 2025 |
| WLA Virtual Bookkeeping & Multiservices Ltd | Professional & scientific | 2024 |
| WLG Fire & Security Ltd | Administrative & support | 2018 |
| WMA Civil Engineering Limited | Construction | 2016 |
| WMB 360 Ltd | Construction | 2025 |
| WMC Transport Ltd | Transport & logistics | 2023 |
| Woburn House Property Management Company Limited | Real estate | 2005 |
| Wogan Ltd | Professional & scientific | 2025 |
| WOK Inn Restaurants Limited | Hospitality | 2005 |
| Wokaholic Ltd | Hospitality | 2025 |
| Wolf & BEE Ltd. | Manufacturing | 2018 |
| Wolf Rock (Cornwall) Limited | Hospitality | 2015 |
| Wolfdrop Logistics Limited | Transport & logistics | 2025 |
| Wolfes & FOX Legal Consult Limited | Professional & scientific | 2024 |
| Wollaston Spires View Management Limited | Households | 2024 |
| Wololo Ltd. | Information & communication | 2019 |
| Wolseley Fish & Chips Limited | Hospitality | 2012 |
| Wolstenholme Holdings Ltd | Real estate | 2020 |
| Wombat Homes Limited | Real estate | 2020 |
| Womblers Group Ltd | Water & waste | 2026 |
| Women of the Word Ltd | Other services | 2024 |
| Women Wander Wild Ltd | Administrative & support | 2025 |
| Women's AID Leicestershire Limited | Administrative & support | 2010 |
| WON Holding Limited | Professional & scientific | 2025 |
| Wonderful Office Workspaces Ltd | Wholesale & retail | 2021 |
| Wonderful Stuff TV Limited | Information & communication | 2017 |
| Wontum Ltd | Education | 2024 |
| Wood Pizza Oven Ltd | Hospitality | 2016 |
| Woodburn Cottage Services Limited | Health & social care | 2010 |
| Woodcraftpixel Limited | Arts & recreation | 2025 |
| Wooden House Kennels Limited | Agriculture & fishing | 2010 |
| Woodeson Drury Limited | Professional & scientific | 1998 |
| Woodland & Water Management Limited | Agriculture & fishing | 2021 |
| Woodland Gate Limited | Professional & scientific | 2023 |
| Woodland View Primary School | Education | 2012 |
| Woodlands MGT Co Ltd | Households | 2020 |
| Woodlands Recruitment Solutions Ltd | Administrative & support | 2011 |
| Woodlawn Enterprise Holdings Ltd | Wholesale & retail | 2025 |
| Woodleys Farm Day Nursery Limited | Education | 2007 |
| Woodmeadow Car Wash Ltd | Administrative & support | 2026 |
| Woodmeadow Hand Car Wash Ltd | Other services | 2020 |
| Woodpatch Ltd | Hospitality | 2022 |
| Woods and Woods Consulting Services Ltd | Extraterritorial | 2013 |
| Woods Electrical Accessories Limited | Professional & scientific | 1987 |
| Woods Hardwick Planning Limited | Professional & scientific | 1999 |
| Woodview Light Transport LLP | | 2015 |
| Woodville Cottage Management Company Limited | Households | 2019 |
| Woodworkx Ltd | Manufacturing | 2023 |
| Woody Brampton Limited | Health & social care | 2014 |
| Woody Properties Ltd | Real estate | 2020 |
| Woody's PUB Company Limited | Hospitality | 2007 |
| Woodz Anthems Entertainment Ltd | Information & communication | 2024 |
| Woof World Group Ltd | Information & communication | 2025 |
| Wooldridge Corporation Ltd | Hospitality | 2022 |
| Woolfe Jewellery Limited | Administrative & support | 1994 |
| Woolmonger Residences Limited | Real estate | 2025 |
| Wooster Associates Ltd | Professional & scientific | 2011 |
| Wootton 1966 Limited | Extraterritorial | 2014 |
| Wootton Central Limited | Financial services | 2024 |
| Wootton Coffee Shop Limited | Hospitality | 2025 |
| Wootton Electrical Limited | Construction | 2003 |
| Wootton Park Academy Trust | Administrative & support | 2013 |
| Wootton Wellness Counselling Services Limited | Health & social care | 2024 |
| Word Window Ltd | Manufacturing | 2021 |
| Wordingham Estates Ltd | Real estate | 2020 |
| Wordpump Digital Ltd | Administrative & support | 2014 |
| Words and Images Ltd | Arts & recreation | 2019 |
| Words and Wickets Ltd | Information & communication | 2014 |
| Words Here Ltd | Information & communication | 2019 |
| Wordsworth Enterprises Limited | Information & communication | 2011 |
| Work and Design on Metal Limited | Construction | 2024 |
| Work Here Ltd | Administrative & support | 2018 |
| Work of GOD Ltd | Wholesale & retail | 2025 |
| Work Outsourcing Solutions Limited | Professional & scientific | 2023 |
| Workbridge Ltd | Education | 2026 |
| Workplace Cleaning Solutions East Northants Ltd | Administrative & support | 2021 |
| Workplace Fashion Limited | Wholesale & retail | 2017 |
| Works Wonders Consulting Limited | Professional & scientific | 2014 |
| Workshop 77 Limited | Wholesale & retail | 2022 |
| Workshop Equipment Services Ltd | Manufacturing | 2026 |
| Workshop Equipment Solutions Ltd | Wholesale & retail | 2026 |
| Worktree Care Solutions Portsmouth Limited | Administrative & support | 2022 |
| Worktree Solutions Ltd | Administrative & support | 2019 |
| Workwear Northampton Limited | Wholesale & retail | 2012 |
| World Changers Summit Europe Limited | Administrative & support | 2025 |
| World Changers Summit U.K International Limited | Administrative & support | 2025 |
| World Enterprise Skills Limited | Hospitality | 2018 |
| World of Communication Ltd | Wholesale & retail | 2020 |
| World of Education Ltd | Education | 2025 |
| World Sporting Ltd | Arts & recreation | 2022 |
| World Trades Publishing Ltd. | Information & communication | 1987 |
| World Wide Wrench Ltd | Wholesale & retail | 2023 |
| Worldwide Innovative Investment Developments Ltd | Real estate | 2023 |
| Worle Catering Ltd | Hospitality | 2018 |
| Wormcount.Com Ltd | Professional & scientific | 2018 |
| Worsley Private Investments Ltd | Real estate | 2011 |
| Worthingtons Consultancy Ltd | Professional & scientific | 2014 |