| THE Sewing Box (Spalding) Limited | Wholesale & retail | 2004 |
| THE TAY Salmon Fishing Company Limited | Agriculture & fishing | 2002 |
| Thin Red Line Limited | Wholesale & retail | 2001 |
| Thinc Limited | Information & communication | 2003 |
| Thomas Building Services Limited | Construction | 2006 |
| Time Bar Limited | Extraterritorial | 1996 |
| Times Express Ltd | Wholesale & retail | 2016 |
| TOM R Ranyard Limited | Manufacturing | 2001 |
| Tony Snarey Developments and Construction Limited | Real estate | 1992 |
| Tony Ward Garden Furniture Ltd | Manufacturing | 2006 |
| Top of the Pile Quality Carpets Ltd | Wholesale & retail | 2003 |
| Towermist Limited | Construction | 2004 |
| Tractech Limited | Wholesale & retail | 2004 |
| Travel and Trek Limited | Administrative & support | 2011 |
| Trent Wharfage Limited | Extraterritorial | 1966 |
| Trentside Developments Limited | Real estate | 1998 |
| Triple Software Limited | Information & communication | 1994 |
| Trojanwood Limited | Manufacturing | 2007 |
| Truckfest Limited | Arts & recreation | 1995 |
| Truelove Property Lettings Ltd | Real estate | 2005 |
| Truetechservices Ltd | Administrative & support | 2020 |
| Turnbull and Company Limited | Wholesale & retail | 1954 |
| Turner's of Horncastle Limited | Construction | 1998 |
| Turvey Consultancy Limited | Professional & scientific | 2000 |
| U.K. Fire Securities Limited | Administrative & support | 1996 |
| UK Industrial Income Limited Partnership | | 2003 |
| UK Sands Ltd | Manufacturing | 2023 |
| Ulex Ltd | Professional & scientific | 1988 |
| Unico Corporation Limited | Transport & logistics | 1993 |
| Unique Car Mats (U.K.) Limited | Manufacturing | 1989 |
| United Paints Limited | Extraterritorial | 1997 |
| Universal Civil Engineering Limited | Wholesale & retail | 1999 |
| Universal Pet Care Limited | Extraterritorial | 1979 |
| V. P. and C. Limited | Real estate | 2005 |
| Valecoast Limited | Real estate | 1999 |
| Verona Holdings Limited | Financial services | 1965 |
| Vestbirk & Co Limited | Professional & scientific | 2007 |
| Vine House Farm Limited | Wholesale & retail | 2004 |
| VL Accounting Limited | Professional & scientific | 2002 |
| VOC Antiques Limited | Wholesale & retail | 2003 |
| W & B Willett (Sales) Limited | Households | 2003 |
| W & L Willett (Sales) Limited | Households | 2003 |
| W a Spence Limited | Construction | 2006 |
| W. Wilson Remedial Massage Limited | Health & social care | 2003 |
| W.A. Jaines & SON (Holdings) Limited | Financial services | 2025 |
| W.A. Jaines & SON (Properties) Limited | Real estate | 2025 |
| W.Dennis & Sons Limited | Professional & scientific | 1970 |
| W.E. Pinder & SON Limited | Other services | 2002 |
| Wainfleet Allsaints Market Company Limited(The) | Administrative & support | 1893 |
| Wakley Electrical Limited | Construction | 2002 |
| Waldeck Snarey & Brown Limited | Real estate | 2008 |
| Walkers Removals Limited | Transport & logistics | 2002 |
| Walters Opticians Limited | Wholesale & retail | 2002 |
| Waltham Tannery Company Limited | Manufacturing | 1998 |
| Ward's Citrus Products Limited | Financial services | 1933 |
| Waring & Gillow ( Holdings ) Limited | Extraterritorial | 2006 |
| Waring & Gillow Ltd | Extraterritorial | 2003 |
| Warman Civil Engineering Limited | Construction | 2005 |
| WB Wholesale Foods Limited | Hospitality | 2000 |
| WE R Global Sourcing Solutions Ltd | Professional & scientific | 2005 |
| Web Publicity and Signs Limited | Manufacturing | 2002 |
| Webbs of Peterborough Limited | Wholesale & retail | 2003 |
| Weeden Ltd | Professional & scientific | 2005 |
| Well Good Payments Ltd | Professional & scientific | 2025 |
| Wells and SON Marquees Limited | Other services | 1998 |
| West END Bowling Club (Boston) Limited | Arts & recreation | 2004 |
| Westerdale Services Limited | Wholesale & retail | 2006 |
| Westropp Limited | Professional & scientific | 1965 |
| Westside Properties (Stamford) Limited | Construction | 2007 |
| Westwood Properties (UK) Limited | Real estate | 2003 |
| Westworld Limited | Information & communication | 2018 |
| Wheeler & Walker Holdings Limited | Real estate | 1957 |
| Whitworth & Rush Limited | Construction | 2007 |
| Willingham Warehousing Limited | Transport & logistics | 1993 |
| Willoughby Foods Limited | Hospitality | 2005 |
| Wilson & Sons (Animal Feeds) Limited | Wholesale & retail | 2005 |
| Windmill Restaurant (Lincs) Limited | Hospitality | 2007 |
| Wise EDU Global Ltd | Education | 2024 |
| Wiselinc Solutions Ltd | Transport & logistics | 2018 |
| Witham Garage Ltd | Wholesale & retail | 2004 |
| Witham OIL & Paint (Lowestoft) Limited | Extraterritorial | 1987 |
| Wold Engineering Limited | Manufacturing | 1990 |
| Workforce (Boston) Limited | Administrative & support | 2005 |
| Worlaby Farming Company | Professional & scientific | 1956 |
| Worth Developments Limited | Construction | 2003 |
| Wray Clean Ltd | Administrative & support | 2007 |
| Wright Vigar Limited | Professional & scientific | 2002 |
| Wright's Roofing Limited | Extraterritorial | 2003 |
| Wyeplants Limited | Administrative & support | 1978 |
| Wynn Business Partnerships Limited | Administrative & support | 2006 |
| Yellowcab (Ipswich) Limited | | 1989 |
| Your Online Personal Organiser (Yopo) Ltd | Information & communication | 2018 |