| Very Deep Learning Ltd | Bristol | 2024 |
| Vessel Management Ltd | Skelmersdale | 2015 |
| Vestal-Gr Capital Ltd | Essex | 2025 |
| Vexoil Ltd | Salford | 2024 |
| Vface Energy Limited | Ilford | 2016 |
| VG Energies Group Holdings Limited | Glasgow | 2025 |
| VG Energy Global Ltd | Glasgow | 2023 |
| Viann Resources Ltd | London | 2014 |
| Viaro Energy Limited | London | 2020 |
| Vibratherm Limited | Stoke-On-Trent | 2011 |
| VIC CBM Limited | London | 2009 |
| Victoria Energy Central Asia UK Limited | London | 2005 |
| Victoria International Services Ltd | London | 2017 |
| Victoria OIL & GAS PLC | London | 2004 |
| Victoria OIL and GAS Central Asia Limited | London | 2004 |
| Victoria Petroleum Limited | London | 1982 |
| Victoria's Lifting Solutions Ltd | Aberdeen | 2025 |
| Viggars Bros Limited | Narbeth | 1995 |
| Viiron OIL & GAS UK Limited | Plymouth | 2025 |
| Viking CCS Limited | London | 2020 |
| Viking Rope Services Limited | Saltburn-By-The-Sea | 2019 |
| Viking Supply Ships Limited | Aberdeen | 1999 |
| Villiers Limited | Egham | 2004 |
| Vipmarketing Ltd | London | 2025 |
| VIR Magnus Limited | London | 2023 |
| Vira Drilling Services Ltd | Potters Bar | 2022 |
| Virginia Indonesia Co. CBM Limited | London | 2009 |
| Viscount Engineers Limited | Nottingham | 2002 |
| Vision Platform Limited | London | 2020 |
| Vision World Limited | London | 2025 |
| Visuna Limited | Washington | 2003 |
| Vitol Broking Limited | London | 1999 |
| Vivid Position Limited | Richmond | 2010 |
| Vizder Ltd. | London | 2023 |
| Vizion Energy Ltd | Lodon | 2017 |
| VL Master Tradesmen Ltd | Grange-Over-Sands | 2023 |
| Vocass Services Limited | Hartlepool | 2021 |
| Vogrie Geoservices Limited | Peebles | 2006 |
| VOH Support Vessels Limited | Aberdeen | 2002 |
| Voladorquamet Asset Group Ltd | Southend On Sea | 2025 |
| Volta OIL & GAS Limited | Guildford | 2010 |
| Voltex Gold Ltd | Slough | 2023 |
| Voltrig Inc Ltd | London | 2018 |
| Vonel Consulting Ltd | Wembley | 2017 |
| Vorlich Management Limited | Edinburgh | 2015 |
| Vortex Rigging Solutions Ltd | Inverness | 2023 |
| Vortex Wind Ltd | South Shields | 2026 |
| Vroon Offshore Services Limited | Aberdeen | 1994 |
| VRP Mining Ltd | Maidstone | 2022 |
| Vulcan Asphalt Group Limited | Ballymena | 2016 |
| Vulcan Green Copper Ltd | Ascot | 2011 |
| Vysus (GB) Limited | Westhill | 1990 |
| Vysus Limited | Westhill | 2004 |
| W B Engineering Lowestoft Limited | Halesworth | 2018 |
| W E L Services Limited | Great Yarmouth | 2016 |
| W H Pipe Fitting Services Limited | Elgin | 2017 |
| W J N Engineering Ltd | Ross Shire | 2007 |
| W J Owen & SON Ltd | Amlwch | 2015 |
| W J Whyte Oilfield Consultants Ltd | Turriff | 2022 |
| W&G Group Limited | Guildford | 2015 |
| W&S Energy Services Limited | London | 2011 |
| W. & J. Chambers Ltd | Londonderry | 1994 |
| W. Maher (Aggregates) Limited | Warrington | 1994 |
| W.A.M Energy Services Ltd | Great Yarmouth | 2026 |
| W.C.D. Sleeman & Sons Limited | Bath | 2000 |
| W.Clifford Watts Limited | Bridlington | 1944 |
| W.E. Leach (Shipley) Limited | Leeds | 1956 |
| W.S. Crossley (York Stone) Limited | Halifax | 1973 |
| W.T. Lamb Holdings Limited | West Sussex | 1947 |
| W1 OIL & GAS Limited | London | 2019 |
| W9 Energy Limited | London | 2019 |
| Wadjes Limited | Aberdeen | 2021 |
| Wahi-Mahi Ltd | Keswick | 2008 |
| Wakefield Clarke Limited | Peterculter | 1995 |
| Wakefield Sand and Gravel Limited | Dewsbury | 2020 |
| Waldorf CNS (I) Limited | Aberdeen | 2005 |
| Waldorf CNS (II) Limited | Manchester | 2003 |
| Waldorf Operations Limited | Manchester | 2014 |
| Waldorf Petroleum Resources Limited | Manchester | 2000 |
| Waldorf Production North Sea Limited | Manchester | 1998 |
| Waldorf Production UK PLC | Manchester | 2004 |
| Walker Barn Quarry Limited | Maccesfield | 2021 |
| Walker Completions Services Limited | Tarves | 2001 |
| Walker Minerals Limited | Hope Valley | 1983 |
| Wallace Commissioning Limited | Billingham | 2014 |
| Wallace Geophysical Limited | Newquay | 2005 |
| Wallace Integrity Ltd | Peterhead | 2023 |
| Walters Resources Limited | Hirwaun Aberdare | 1985 |
| Waltons Concrete Ltd | Darlington | 2010 |
| Ward Drill Limited | London | 2023 |
| Wardell Armstrong International Limited | Stoke-On-Trent | 1999 |
| Wardrop Minerals Management Limited | Baldock | 2013 |
| Wards Mechanical Services Ltd | Great Yarmouth | 2019 |
| Warrack Engineering Services Ltd | Montrose | 2023 |
| Warrior International Limited | Bracknell | 2001 |
| Wartle Subsea Ltd | Aberdeen | 2023 |
| Warwick Energy Limited | Redditch | 2000 |
| Warwick Price Limited | Lowestoft | 2024 |
| Waste Removal & Groundwork’S Ltd | Liverpool | 2025 |
| Waterfall Mining Limited | London | 2020 |