| West Common Properties Limited | Real estate | 2000 |
| West Country Distributors Ltd | Wholesale & retail | 2020 |
| West END Paddocks Ltd | Hospitality | 2024 |
| West END Wings Limited | Hospitality | 1999 |
| West Haddon 10 Renewables Limited | Professional & scientific | 2023 |
| West Haddon Management Company Limited | Households | 2016 |
| West Midlands School of Traditional Karate Limited | Arts & recreation | 2018 |
| West Northamptonshire Social Enterprise Towns CIC | Administrative & support | 2020 |
| West Northants Group Ltd | Administrative & support | 2021 |
| West One Manor Hotel Limited | Hospitality | 2013 |
| West Plastering Limited | Construction | 2007 |
| West Point Office Park Management Company Limited | Real estate | 2000 |
| West Rising Holdings Ltd | Financial services | 2024 |
| West Villa Flats Management Limited | Real estate | 1997 |
| West Weybridge 10 Renewables Limited | Professional & scientific | 2023 |
| Westaway Investments LLP | | 2019 |
| Westaway Motors Limited | Wholesale & retail | 1965 |
| Westaway Travel Ltd | Administrative & support | 2025 |
| Westbanz Cargo Ltd | Transport & logistics | 2026 |
| Westbourne Dental Practice Wirral Limited | Health & social care | 2018 |
| Westbournia Brewing Company Limited | Manufacturing | 2013 |
| Westbridge Holdings (N'Pton) Limited | Financial services | 2025 |
| Westbury Carpets & Floorcoverings Ltd | Construction | 2025 |
| Westbury Carpets Limited | Construction | 2025 |
| Westchester House Nursery Schools Limited | Health & social care | 2004 |
| Westcroft Management Company Limited | Households | 2025 |
| Western Flooring Contracts Limited | Wholesale & retail | 2017 |
| Western Furnishings Limited | Wholesale & retail | 2013 |
| Westgate Consultants Ltd | Information & communication | 2008 |
| Westgate Property Consultants Ltd | Real estate | 2016 |
| Westhorpe Care Ltd | Health & social care | 2025 |
| Westleigh Office Park Management Company Limited | Real estate | 1999 |
| Westley Building Services Ltd | Construction | 2022 |
| Westley Holdings Limited | Real estate | 2023 |
| Westlita Ltd | Other services | 2019 |
| Westminster Capital Management Limited | Financial services | 2006 |
| Westminster Court (Waltham Cross) Management Company Limited | Professional & scientific | 1988 |
| Westminster Investment Group Limited | Real estate | 2021 |
| Weston Favell Church of England Primary School | Education | 2012 |
| Weston Fitness Studio Ltd | Arts & recreation | 2022 |
| Westone Roofing & Building Services Ltd | Construction | 2022 |
| Westone Roofing Ltd | Construction | 2019 |
| Westons Care Group Ltd | Health & social care | 2024 |
| Weststar Developments Limited | Financial services | 2015 |
| Westway Packing Ltd | Administrative & support | 2022 |
| Wetham Healthcare Ltd | Administrative & support | 2023 |
| Wetotalclean Ltd | Administrative & support | 2025 |
| WFP Lettings Limited | Real estate | 2017 |
| WG Installations Limited | Transport & logistics | 2020 |
| WG Veterans Limited | Arts & recreation | 2019 |
| WGL Northants Limited | Hospitality | 2025 |
| WH Brickwork Limited | Construction | 2017 |
| WH Management Consultancy Limited | Professional & scientific | 2022 |
| WH Trading Limited | Wholesale & retail | 2023 |
| Whaka Publishing Ltd | Wholesale & retail | 2008 |
| Whales Childcare Limited | Education | 2016 |
| Whales Leisure Limited | Arts & recreation | 2021 |
| Whales Play Limited | Arts & recreation | 2023 |
| Whales Retail Limited | Wholesale & retail | 2021 |
| What Could Possibly Go Wrong Ltd | Hospitality | 2026 |
| What the Truck?! Ltd | Hospitality | 2026 |
| Whatms Ltd | Health & social care | 2025 |
| Wheel UP Transport Services Ltd | Transport & logistics | 2020 |
| Wheelclinic Northampton Ltd | Wholesale & retail | 2016 |
| Wheelpits Limited | Manufacturing | 2016 |
| Wheelwingss Rental Ltd | Administrative & support | 2025 |
| Whelan Limited | Construction | 2005 |
| Wherehouse Limited | Real estate | 2020 |
| Which Homecare Limited | Information & communication | 2025 |
| Whichtransport Limited | Professional & scientific | 2018 |
| Whichwarehouse Limited | Professional & scientific | 2016 |
| Whilton Lodge Owners Limited | Households | 1994 |
| Whilton Mill Holdings Limited | Arts & recreation | 2026 |
| Whip IT UP Ltd | Hospitality | 2025 |
| Whippy Scoops Ltd | Hospitality | 2025 |
| Whisk'D Ltd | Manufacturing | 2020 |
| Whispering Fish Ltd | Extraterritorial | 2008 |
| Whissendine Grove Residents Management Company Limited | Real estate | 2024 |
| Whistling Duck Ltd | Arts & recreation | 2018 |
| Whitacre Trading Limited | Construction | 2014 |
| White & Browns Property Management Ltd | Information & communication | 2017 |
| White & Joyce Limited | Construction | 1969 |
| White & Walker Ltd | Administrative & support | 2015 |
| White Cobra Theatricals CIC | Arts & recreation | 2019 |
| White Elephant Records Northampton Ltd | Professional & scientific | 2021 |
| White Falcon Transport Services Ltd | Transport & logistics | 2022 |
| White Heather Limited | Hospitality | 2008 |
| White House Payments Limited | Financial services | 2023 |
| White Mills Marina Limited | Hospitality | 2015 |
| White Motorcycle Concepts Ltd | Professional & scientific | 2018 |
| White Oak Center CIC | Health & social care | 2026 |
| White Rabbit & Party Ltd | Administrative & support | 2024 |
| White Removals and Storage Ltd | Transport & logistics | 2015 |
| White Wolf Rising Limited | Information & communication | 2016 |
| White's PUB Ltd | Hospitality | 2025 |
| Whiteheart Health Care Ltd | Health & social care | 2021 |
| Whitehills Roofing Ltd | Construction | 2024 |
| Whitehills Spice Limited | Hospitality | 2025 |
| Whites Electrical Limited | Construction | 2022 |
| Whites Estate Agents Limited | Real estate | 1998 |