| W4D Corp Ltd | Information & communication | 2025 |
| Wadham House Management Company Ltd | Households | 2023 |
| Watermill Kitchens Limited | Manufacturing | 2011 |
| Waters Group Consumables Limited | Wholesale & retail | 2016 |
| Waters Group Holding Company Limited | Professional & scientific | 2016 |
| Waters Group Small Machinery Limited | Wholesale & retail | 2016 |
| Waters Group Ventures Limited | Wholesale & retail | 2016 |
| Webb Developments (S.W.) Ltd | Construction | 2015 |
| Webb's Court (Liskeard) Limited | Real estate | 2004 |
| Wedgbury & Co Ltd | Real estate | 2019 |
| Welkin Developments (SW) Ltd | Real estate | 2020 |
| Welltown Limited | Real estate | 2003 |
| Wellydog Limited | Manufacturing | 2014 |
| Wesley Court (Pensilva) Management Limited | Real estate | 2002 |
| West Carclaze Development Ltd | Construction | 2019 |
| Westcountry Consultancy and Training Ltd | Financial services | 2023 |
| Western Build Ltd | Construction | 2011 |
| Western Groundworks Limited | Construction | 2019 |
| Westford House Limited | Hospitality | 2012 |
| Westmoor Coast Press Limited | Information & communication | 2026 |
| Whirlwind Sports Limited | Wholesale & retail | 2014 |
| Whitehair Engineering Ltd | Wholesale & retail | 2017 |
| Wild Tales Earth Ltd | Education | 2026 |
| Wildanet Holdco Limited | Information & communication | 2023 |
| Wildanet Limited | Information & communication | 2017 |
| Wildanet Midco 1 Limited | Information & communication | 2023 |
| Wildanet Midco 2 Limited | Information & communication | 2023 |
| Willicott Court Management Limited | Households | 2003 |
| Willowby Gardens Management Company Ltd | Households | 2001 |
| Wilton Trading Ltd | Wholesale & retail | 2023 |
| Winter Wolf Films Limited | Administrative & support | 2024 |
| With Love (Cornwall) Limited | Health & social care | 2024 |
| Woodcock's Club Limited | Agriculture & fishing | 1969 |
| Woodfield DC Ltd | Professional & scientific | 2003 |
| Woodfield Ecology Ltd | Professional & scientific | 2021 |
| Woolston Developments Limited | Construction | 2026 |
| World Whisky Association | Other services | 2021 |
| Worldspectrum Ltd | Wholesale & retail | 2025 |
| Www.Bman.Me.Uk Ltd | Wholesale & retail | 2022 |
| Xacct Accounting Limited | Professional & scientific | 2025 |
| Yonder Organics Limited | Agriculture & fishing | 2022 |
| Your Ideal Mortgage Ltd | Financial services | 2018 |
| Zaroya Solutions Limited | Wholesale & retail | 2025 |
| ZLC Energy Ltd | Professional & scientific | 2012 |
| Zushi Digital Ltd | Information & communication | 2014 |