| Unique Supply Co. Ltd | Wholesale & retail | 2026 |
| Unity Holidays Ltd | Real estate | 2025 |
| Universal Louth Ltd | Administrative & support | 2016 |
| Uppercut Barbers Stanway Ltd | Other services | 2016 |
| Utap Ltd | Professional & scientific | 2024 |
| Utter Bedlam Ltd | Arts & recreation | 2023 |
| Valley and Peak Limited | Manufacturing | 2018 |
| Vape Shop Louth Ltd | Wholesale & retail | 2025 |
| Vebox Limited | Wholesale & retail | 2000 |
| Velocity Revops Consulting Ltd | Information & communication | 2025 |
| VIA Italia (Louth) Limited | Hospitality | 2008 |
| Vickers Court Management Company Ltd | Households | 2026 |
| Viewround Limited | | 1976 |
| Vincere Hospitality Limited | Hospitality | 2015 |
| Viri Cotton Ltd | Wholesale & retail | 2024 |
| Vita Gratia Ltd | Wholesale & retail | 2025 |
| Volks World Racing Limited | Wholesale & retail | 2012 |
| Volumat Limited | Manufacturing | 2025 |
| W M Systems Limited | Administrative & support | 1997 |
| W.A. Jaines & SON Limited | Transport & logistics | 1977 |
| Wadner Holdings Limited | Financial services | 2022 |
| Walmsgate Estate Limited | Agriculture & fishing | 2017 |
| Walrus Wellness Limited | Health & social care | 2025 |
| Waltham Property Maintenance Limited | Construction | 2020 |
| Wamandco Ltd | Real estate | 2025 |
| Warehouse Airsoft Arena Limited | Arts & recreation | 2017 |
| Watergate Engineering Services Ltd | Professional & scientific | 2024 |
| Watkinson Electrical Limited | Construction | 2017 |
| Wattsy Ltd | Real estate | 2025 |
| WCB Developments Limited | Construction | 2025 |
| Weathermasters Limited | Administrative & support | 1997 |
| Web Marketing Solutions Limited | Information & communication | 2011 |
| Well Made Construction Limited | Construction | 2019 |
| Welton Garden Services Limited | Administrative & support | 2021 |
| Werber Limited | Wholesale & retail | 2021 |
| Westfield Park (Louth) Management Company Limited | Households | 2018 |
| Westgate Food Consulting Ltd | Hospitality | 2014 |
| Westgate Packaging Limited | Wholesale & retail | 2010 |
| Westgrowers Limited | Agriculture & fishing | 2009 |
| Westwick Audio Limited | Construction | 2003 |
| Westwick Installation Limited | Professional & scientific | 1989 |
| White Horse Louth Ltd | Hospitality | 2025 |
| Wide Space Parking Ltd | Administrative & support | 2019 |
| Wilkinson Court Management Company Limited | Households | 2013 |
| Willingham Woods Ltd | Hospitality | 2003 |
| Wilson Building Solutions Limited | Construction | 2010 |
| Winegb Limited | Administrative & support | 2017 |
| Wines of Great Britain Limited | Other services | 1996 |
| Winsor Estates Limited | Households | 1986 |
| Wise Chat Solutions Ltd | Administrative & support | 2026 |
| WJC Developments Limited | Construction | 2021 |
| Woldlink Limited | Wholesale & retail | 2013 |
| Wolds Beauty Limited | Other services | 2016 |
| Wolds Manufacturing Services Ltd | Manufacturing | 2013 |
| Wolds Motorcycle Training Ltd | Education | 2018 |
| Wolds Retreat Limited | Wholesale & retail | 2020 |
| Wolds Travel Limited | Transport & logistics | 2019 |
| Woldshire Properties Limited | Real estate | 2025 |
| Woldside Plant & Agri Ltd | Manufacturing | 2021 |
| Woodlands Farm Partnership Limited | Agriculture & fishing | 2024 |
| Woolliss & SON Ltd | Wholesale & retail | 2017 |
| Woolly Bear Therapy Services Ltd | Health & social care | 2020 |
| Wrights Hardwoods Limited | Wholesale & retail | 2013 |
| WTG Electrical Ltd. | Construction | 2016 |
| WTH Trading Limited | Professional & scientific | 2018 |
| Wundova-Stretch Limited | Real estate | 1966 |
| Wytham Healthcare Services Limited | Health & social care | 2012 |
| Wyverne Limited | Hospitality | 2015 |
| Xcel Property Investments Ltd | Real estate | 2022 |
| Yesthankyou Limited | Wholesale & retail | 2020 |
| Yieldnew Limited | Extraterritorial | 1992 |
| Zanzi Digital Marketing Ltd | Professional & scientific | 2014 |
| Zapiet Ltd | Information & communication | 2015 |
| ZK Flow Screed Ltd | Construction | 2020 |
| ZR Contracting Ltd | Construction | 2026 |