| Ulster Speleological Society & Caving Club Ltd | Wholesale & retail | 2021 |
| Umbracore Limited | Health & social care | 2025 |
| Uniexp Ltd | Wholesale & retail | 2009 |
| UO Consultants Ltd | Professional & scientific | 2014 |
| Utopic Dreams Ltd | Wholesale & retail | 2023 |
| V and a Consultancy (N.I.) Limited | Professional & scientific | 2017 |
| Vadd Associates Limited | Wholesale & retail | 2024 |
| Valley Services (NI) Limited | Real estate | 2014 |
| Van Locks Ireland Ltd | Wholesale & retail | 2025 |
| Vergeconnect Ltd | Information & communication | 2022 |
| Verntec Limited | Extraterritorial | 2024 |
| Viaduct Windows & Doors Ltd | Construction | 2015 |
| Video Vault Limited | | 2007 |
| Village Minimart Ltd | Wholesale & retail | 2024 |
| Vincent Capital Holdings Ltd | Financial services | 2026 |
| Vincent Vets Ltd | Professional & scientific | 2026 |
| Vinmac Properties Ltd | Real estate | 2001 |
| VISION19 Ltd | Information & communication | 2016 |
| Visitrans Company L.P. | | 2017 |
| Visual Script Ltd | Information & communication | 2007 |
| Vitreous Ltd | Manufacturing | 2014 |
| VME Retail Systems Limited | Information & communication | 1988 |
| Volt Holdings Ltd | Financial services | 2015 |
| Volt Retail Ltd. | Wholesale & retail | 2010 |
| VON Plastering Ltd | Construction | 2008 |
| Vorsa Ltd | Wholesale & retail | 2025 |
| Voyage Property Group Ltd | Real estate | 2022 |
| Voysey Square Management Company Limited | Real estate | 2002 |
| VRG Resources NI Limited | Construction | 2019 |
| Vulcor Global Ltd | Information & communication | 2021 |
| Wallace's of Antrim Ltd | Wholesale & retail | 2023 |
| Water Worksni Ltd | Water & waste | 2026 |
| Waterline Products Limited | Water & waste | 2013 |
| Watson Motorcycles Limited | Wholesale & retail | 2012 |
| Waves Athleisure Ltd | Wholesale & retail | 2023 |
| Wayne Boyd Racing Ltd | Arts & recreation | 2016 |
| WDM Coaching Ltd | Other services | 2023 |
| WE Slim Community Ltd | Other services | 2022 |
| Weld Tables (NI) Ltd | Manufacturing | 2026 |
| Westbourne Management Company (NI) Limited | Real estate | 2007 |
| Western House Holdings Ltd | Financial services | 2023 |
| Westlin Properties Ltd | Real estate | 2001 |
| Whiteside Services Ltd | Administrative & support | 2022 |
| Wickerboat Ltd | Professional & scientific | 2025 |
| Will Freight Services Limited | Transport & logistics | 1979 |
| Willow Mount Company Limited | Financial services | 2021 |
| Wilson Farmlands Limited | Agriculture & fishing | 2000 |
| Wilson Joinery Contracts Ltd | Construction | 2025 |
| Wilson Mills & SON (Building Contractor) Ltd | Construction | 2024 |
| Wilson Property Limited | Real estate | 2000 |
| Wing WAH Antrim Ltd | Hospitality | 2022 |
| Wired/Different Events CIC | Public administration | 2026 |
| Woodhouse Ireland Limited | Manufacturing | 2017 |
| World Obatala Arts and Culture Limited | Other services | 2017 |
| Www.Bathshack (Ireland) .Co.Uk Ltd | Manufacturing | 2009 |
| Xcel Health Care NI Limited | Health & social care | 2025 |
| Yellow Crane Creative Ltd | Information & communication | 2014 |
| Yewtree F Meats Ltd | Wholesale & retail | 2021 |
| Yewtree Family Butcher Ltd | Manufacturing | 2018 |
| YJG Design Ltd | Wholesale & retail | 2023 |
| YTP Aesthetic & Academy Ltd | Other services | 2024 |
| YTP Medicare Ltd | Wholesale & retail | 2023 |
| Zain Vertex Limited | Wholesale & retail | 2024 |
| Zara HC Ltd | Health & social care | 2023 |
| Zelda & Harley Ltd | Wholesale & retail | 2024 |
| Zenith Fire Safety Ltd. | Construction | 2021 |
| Zgzyxgs Limited | Wholesale & retail | 2025 |