| Ultra Utilities Ltd. | Construction | 2015 |
| Umbrella Traders Ltd | Wholesale & retail | 2024 |
| Umbric Limited | Wholesale & retail | 2025 |
| Umex Limited | Administrative & support | 2011 |
| Uncle P & Erin Limited | Construction | 2024 |
| Uncle P Limited | Construction | 2017 |
| Unicorn Solar Energy Ltd | Manufacturing | 2022 |
| Unique Home Care NI Ltd | Health & social care | 2017 |
| Unit Design Quality Kitchens & Bedrooms Ltd | Manufacturing | 2018 |
| United Canine Services Limited | Administrative & support | 2026 |
| Universal Foods (NI) Ltd | Wholesale & retail | 2019 |
| Upper Dunmurry Lane Apartments Limited | Households | 2000 |
| Urban Community Chef C.I.C. | Hospitality | 2016 |
| Urban Scullery Pubfood NI Ltd | Hospitality | 2023 |
| V&M FUN Limited | Wholesale & retail | 2025 |
| V-Spec Ltd | Wholesale & retail | 2023 |
| VAL Sure Engineering Ltd | Professional & scientific | 2020 |
| Valemo Controls Limited | Wholesale & retail | 2025 |
| Valeria Swift Limited | Wholesale & retail | 2026 |
| Value Payroll Ltd | Professional & scientific | 2010 |
| Vantage Property Solutions Limited | Hospitality | 2024 |
| Vastness Clouds Limited | Wholesale & retail | 2024 |
| Vault Sourcing Ltd | Wholesale & retail | 2026 |
| Veerapath Limited | Wholesale & retail | 2024 |
| Velocis Ventures Ltd | Wholesale & retail | 2025 |
| Velocity Trading & Logistic Ltd | Wholesale & retail | 2025 |
| Velvaere at Eden Day Spa Ltd | Other services | 2025 |
| Vessel Safety Services Ltd | Professional & scientific | 2024 |
| VI Slne Ltd | Wholesale & retail | 2025 |
| VIA Appia 2021 Limited | Hospitality | 2021 |
| Vickers Digital Group Ltd | Information & communication | 2026 |
| Victor Irwin & Sons Ltd. | Real estate | 2014 |
| Victoria Avenue Newtownards Management Company Limited | Households | 2003 |
| Victoria Square Properties Ltd | Real estate | 2022 |
| Victory Wong Limited | Wholesale & retail | 2023 |
| Viewbig Celebrate Limited | Wholesale & retail | 2025 |
| Vigorous Energy Ltd | Wholesale & retail | 2024 |
| Villeca Limited | Wholesale & retail | 2025 |
| Vindicare Limited | Professional & scientific | 2017 |
| Vine Footcare Ltd | Health & social care | 2024 |
| Vinpsos Hightech Limited | Wholesale & retail | 2025 |
| Viola Tech Limited | Wholesale & retail | 2023 |
| VIP Windows and Doors Ltd | Construction | 2022 |
| Viritux Limited | Information & communication | 2021 |
| Virtual Visit Ltd | Professional & scientific | 2006 |
| Virtue Systems Limited | Wholesale & retail | 2025 |
| Visage Aesthetics UK Ltd. | Information & communication | 2010 |
| Visingle Limited | Manufacturing | 2024 |
| Vitamin P Coaching Ltd | Professional & scientific | 2022 |
| Vockhua Limited | Wholesale & retail | 2025 |
| VOG VGQ Ltd | Wholesale & retail | 2024 |
| Vogue Tail Limited | Wholesale & retail | 2023 |
| VOX Animae Ltd | Professional & scientific | 2024 |
| W & D Pizza Limited | Hospitality | 2019 |
| W J Mccormick Contracts Limited | Construction | 2015 |
| Walking Move Ltd | Wholesale & retail | 2024 |
| Walktotop Creative Ltd | Wholesale & retail | 2024 |
| Wallace Canmore Limited | Wholesale & retail | 1986 |
| Wamheet Automotive Supplies Ltd | Wholesale & retail | 2025 |
| Wangbingbing Ltd | Wholesale & retail | 2025 |
| Wangdingyu Ltd | Wholesale & retail | 2025 |
| Wangquanbin Ltd | Wholesale & retail | 2025 |
| Wangyanjun Limited | Wholesale & retail | 2025 |
| Wangyong Ltd | Wholesale & retail | 2025 |
| Wanzijiawhyderetail Ltd | Wholesale & retail | 2025 |
| WAR Years Remembered | Arts & recreation | 2013 |
| Warden Brothers (Newtownards) Limited | Wholesale & retail | 1952 |
| Warehouse and Factory Automation Ltd | Manufacturing | 2022 |
| Warehouse Open Centre CIC | Education | 2023 |
| Warm Spring Limited | Wholesale & retail | 2024 |
| Watashi WA Ltd | Hospitality | 2021 |
| Watson Civils Ltd | Construction | 2019 |
| Watson Developments Limited | Construction | 2015 |
| Wavey Ice Ltd | Hospitality | 2022 |
| WB Onsite Services Ltd | Professional & scientific | 2022 |
| WBR Harness Ltd | Wholesale & retail | 2020 |
| Wcharleys Ecom Ltd | Wholesale & retail | 2024 |
| WD ROV Ltd | Manufacturing | 2021 |
| WE EAT Local Ltd | Information & communication | 2021 |
| WE Sell Heroes CIC | Wholesale & retail | 2022 |
| Web Design Solutions Limited | Information & communication | 1998 |
| WEE Wheels Ride on Cars Ltd | Wholesale & retail | 2020 |
| Weeking Ltd | Wholesale & retail | 2024 |
| Weelia Limited | Wholesale & retail | 2024 |
| Weibo JAN Limited | Wholesale & retail | 2025 |
| Weihost Limited | Wholesale & retail | 2025 |
| Weldpro (N.I.) Limited | Extraterritorial | 1981 |
| Wellness and Holistic Unite C.I.C. | Other services | 2026 |
| Wenhui MEI Ltd | Wholesale & retail | 2025 |
| Wenhui SU Limited | Wholesale & retail | 2025 |
| Wenzping Sport Ltd | Wholesale & retail | 2023 |
| West Chippy Ltd | Hospitality | 2025 |
| West Street Estates Ltd. | Households | 2013 |
| Westland Homes Limited | Real estate | 2014 |
| Westmount Consultancy Limited | Professional & scientific | 2011 |
| WET and Wild Limited | Manufacturing | 2017 |
| Whataboutyemate CIC | Health & social care | 2026 |
| Wheeliebinsni Limited | Wholesale & retail | 2025 |
| Whelan Commercial Ltd | Real estate | 2010 |
| White Construction (N.I.) Limited | Construction | 2021 |