| Vocative Consulting Ltd | Administrative & support | 2011 |
| Voicenet Limited | Information & communication | 2012 |
| Voispeed Limited | Wholesale & retail | 2006 |
| Volkswagen Type 2 Owners Club Limited | Arts & recreation | 2004 |
| Vooligans Limited | Information & communication | 2020 |
| Vortex Guarding Ltd | Administrative & support | 2020 |
| Vosc Property Solutions Ltd | Construction | 2023 |
| Votel Property Limited | Real estate | 2024 |
| Voxed Dance Theatre Ltd | Arts & recreation | 2020 |
| Voxgen Limited | Information & communication | 2019 |
| VP3D Ltd | Professional & scientific | 2022 |
| Vpsm Limited | Wholesale & retail | 2013 |
| VQS Ltd | Administrative & support | 2009 |
| Vrevo Limited | Information & communication | 2019 |
| Vtmsc Ltd | Information & communication | 2026 |
| VY Design Ltd | Professional & scientific | 2026 |
| Vypercore Limited | Professional & scientific | 2022 |
| W a Driving Limited | Transport & logistics | 2025 |
| W a Retail Group Ltd | Wholesale & retail | 2015 |
| W J Gilbey Limited | Real estate | 2025 |
| W2W Ltd | Health & social care | 2020 |
| W5Y Ltd | Professional & scientific | 2024 |
| Waffle Wands Ltd | Hospitality | 2024 |
| Wagada Limited | Information & communication | 2014 |
| WAH (STA) Ltd | Other services | 2023 |
| Waimapu Capital Ltd | Professional & scientific | 2009 |
| Wainscot Limited | Health & social care | 2000 |
| Waiora Ltd | Hospitality | 2025 |
| Waldenvoices Limited | Information & communication | 2025 |
| Waleed Arshad Ltd | Health & social care | 2010 |
| Wallace Holdings Limited | Wholesale & retail | 1998 |
| Wallder Ltd | Professional & scientific | 2015 |
| Wallspan Group Limited | | 1975 |
| Walnut Court Residents Association (Wheathampstead) Limited | Households | 1983 |
| Wantis Recruitment Ltd | Extraterritorial | 2025 |
| Warehamadreani Ltd | Professional & scientific | 2013 |
| Warwick Road North Land Limited | Real estate | 2012 |
| Wasastar Limited | Information & communication | 2012 |
| Wasbrough Commercial Limited | Real estate | 2016 |
| Wasbrough Residential Limited | Real estate | 2016 |
| Washed & Pressed Ltd | Other services | 2011 |
| Wasp Barcode Technologies Limited | Information & communication | 2002 |
| Watatarati Limited | Professional & scientific | 2019 |
| Watches R US Ltd | Wholesale & retail | 2020 |
| Watchtower Films Limited | Information & communication | 2015 |
| Waterloo FMH Ltd | Hospitality | 2021 |
| Watermark Irrigation Ltd | Construction | 2026 |
| Watermelon Properties Limited | Real estate | 2021 |
| Waterworth Swim Academy Ltd | Education | 2021 |
| Watford Catering Ltd | Wholesale & retail | 2025 |
| Watford Chinese Community School Ltd | Education | 2023 |
| Watford Security Ltd | Administrative & support | 2003 |
| Watford Supreme Motors Ltd | Wholesale & retail | 2025 |
| Watling House RTM Company Limited | Households | 2018 |
| Wavaro Ltd | Wholesale & retail | 2025 |
| Wavemed Ltd | Wholesale & retail | 2019 |
| Waystone Consulting Ltd | Professional & scientific | 2025 |
| WB Shop Ltd | Wholesale & retail | 2025 |
| WCB Properties Ltd | Real estate | 2024 |
| Wckp Limited | Information & communication | 2023 |
| WDA Cricket Limited | Manufacturing | 2024 |
| WE ARE M and N Ltd | Administrative & support | 2023 |
| WE ARE Weird Ltd | Manufacturing | 2015 |
| WE Construct Ltd | Construction | 2021 |
| We-Dev Ltd | Information & communication | 2024 |
| We-Manage Ltd | Professional & scientific | 2019 |
| WEARE8 Media Ltd | Information & communication | 2026 |
| Weatherbreak Windows Limited | Construction | 1982 |
| Weaver Hydro Limited | Energy | 2021 |
| Web 3.0 SPV LLP | | 2022 |
| Webforce Logistics Limited | Transport & logistics | 1999 |
| Weblife Ltd | Information & communication | 2000 |
| Wecom ST Albans Limited | Manufacturing | 1942 |
| Wecoo Ltd | Wholesale & retail | 2025 |
| Weeeco Ltd | Water & waste | 2005 |
| Weird Holdings Ltd | Financial services | 2022 |
| Welham Agency Ltd | Administrative & support | 2009 |
| Well Nourished Kids Ltd | Information & communication | 2026 |
| Wellington Road ST. Albans (Management Company) Limited | Households | 1989 |
| Wellness Capital Limited | Wholesale & retail | 2021 |
| Wellspring Leadership Limited | Professional & scientific | 2015 |
| Welwyn & Hatfield Memorial Service Limited | Extraterritorial | 2001 |
| Welwyn and Hatfield Funeral Services Limited | Extraterritorial | 1997 |
| Wendy's Walking Cottages Ltd | Hospitality | 2020 |
| Werson International Ltd | Wholesale & retail | 2013 |
| Wessex Shaw Limited | Wholesale & retail | 2001 |
| West Claims Solutions Limited | Professional & scientific | 2019 |
| West END Barns Ltd | Wholesale & retail | 2020 |
| West Herts Funeral Services Ltd | Other services | 2010 |
| West London Training Academy Ltd | Education | 2020 |
| Westbray Limited | Information & communication | 2004 |
| Westbrook Builders Limited | Construction | 2016 |
| Westcliff Park Drive 2018 Limited | Real estate | 2018 |
| Westdene Developments Limited | Wholesale & retail | 2006 |
| Westenholz Antiques Limited | Wholesale & retail | 1981 |
| Westlook Ltd | Professional & scientific | 2026 |
| Westminster Bridge Partnership Limited | Administrative & support | 2008 |
| Weyman Limited | Wholesale & retail | 1990 |
| WFP Associates Limited | Construction | 2015 |
| Whalesound Limited | Information & communication | 2009 |