| THE BAG Shop (Richmond) Ltd | Wholesale & retail | 2021 |
| THE Bakehouse Donegal Limited | Real estate | 2020 |
| THE Bogside Artists Ltd | Arts & recreation | 2013 |
| THE Bounce House Limited | Arts & recreation | 2010 |
| THE Causeway Private Clinic Limited | Health & social care | 2023 |
| THE Derry Barber Company Ltd | Other services | 2015 |
| THE Dirty Souls Ltd | Hospitality | 2020 |
| THE Hair and Beauty Salon Limited | Other services | 2003 |
| THE Hand Therapist Ltd | Other services | 2023 |
| THE NI Valet Company Limited | Other services | 2012 |
| THE Old Docks Bar & Grill Ltd | Hospitality | 2019 |
| THE Perdon Group Limited | Real estate | 2015 |
| THE PIG 'N' Frog Bistro Ltd | Hospitality | 2023 |
| THE Pope John Paul II Award | Other services | 2016 |
| THE Quirky Raven Ltd | Hospitality | 2018 |
| THE School NW Ltd | Hospitality | 2008 |
| THE Space Creative Studio Ltd | Other services | 2022 |
| THE Taxi Co. (N.I.) Ltd | Transport & logistics | 2012 |
| THE Village Community Hub Ltd | Administrative & support | 2024 |
| THE Web Crew Ltd | Information & communication | 2019 |
| THE Whistle Project Ltd | Education | 2010 |
| Theatre of Witness Network CIC | Health & social care | 2025 |
| Theproperty-Network Ltd | Education | 2025 |
| Thornhill Developments Limited | Construction | 1993 |
| Thornhill Ministries Ltd | Other services | 2001 |
| Three Bridge Car Sales Limited | Wholesale & retail | 2025 |
| Tillie & Henderson Ltd | Real estate | 2021 |
| Timberquay Limited | Hospitality | 2006 |
| Tinneys Toys (NI) Ltd | Wholesale & retail | 2022 |
| Tiny Tots Community Playgroup | Health & social care | 2002 |
| Tirkeeran Ltd | Financial services | 2022 |
| TM Property Holdings Europe Limited | Real estate | 2024 |
| TMC Supplies Northen Ireland Ltd | Wholesale & retail | 2024 |
| Toland Plant (NI) Limited | Administrative & support | 2014 |
| Tollund Ltd | Administrative & support | 2023 |
| Tony Smith Electrical Services Limited | Construction | 2019 |
| Tooban Boys Limited | Real estate | 2014 |
| Top LAD Property Ltd | Real estate | 2024 |
| Tory Hill Limited | Wholesale & retail | 2007 |
| Total Cycling Limited | Wholesale & retail | 2003 |
| Touchstone Contracts Limited | Construction | 2023 |
| Tours of Free Derry Limited | Administrative & support | 2025 |
| Tower Promotions Limited | Arts & recreation | 2011 |
| Tracesource Ltd | Real estate | 2004 |
| Tradeforce Services Ltd | Administrative & support | 2003 |
| Trawest Limited | Professional & scientific | 2025 |
| Treewater Ltd | Health & social care | 2019 |
| Triax Social Economy Projects Ltd | Other services | 2016 |
| Trinigi Limited | Health & social care | 2025 |
| Trinity Distributors Ltd | Wholesale & retail | 2025 |
| Truly Natural Cosmetics Ltd | Manufacturing | 2020 |
| TT Cloud Consulting Limited | Information & communication | 2022 |
| Tuatha Contracts Ltd | Construction | 2025 |
| Tungsten Automation Northern Ireland Limited | Information & communication | 1996 |
| Tuohy Construction Ltd | Construction | 2007 |
| Twiggal Ltd | Real estate | 2010 |
| Two Bees Developments Ltd | Real estate | 2021 |
| U-Bake Limited | Wholesale & retail | 1998 |
| U-Store Depot Ltd | Transport & logistics | 2023 |
| U3A Foyle | Other services | 2001 |
| Ucirl (UK) Limited | Manufacturing | 2022 |
| UK REP Ltd | Professional & scientific | 2021 |
| UMI Foyle Ltd | Hospitality | 2025 |
| Unique Brow Bar NI Ltd | Other services | 2026 |
| Universal Power Services Ltd | Manufacturing | 2014 |
| UQ ST Limited | Construction | 2025 |
| Urban 3D Ltd | Professional & scientific | 2013 |
| V & N Haulage Ltd | Transport & logistics | 2021 |
| Valley Pallet Manufacturing Ltd | Manufacturing | 2018 |
| Valley Properties Ireland Limited | Real estate | 2018 |
| Vape Clouds Limited | Other services | 2019 |
| Vaporlinq E-Liquid Manufacturing Ltd | Manufacturing | 2019 |
| Vartrain Ltd | Education | 2022 |
| VC Eyecare Limited | Wholesale & retail | 2021 |
| Veins North West Limited | Other services | 2016 |
| Velocity Electrical Limited | Construction | 2018 |
| Velocity Worldwide Ltd | Administrative & support | 2011 |
| Velocity Worldwide Retail Ltd | Professional & scientific | 2019 |
| Velocity Worldwide UK Ltd | Professional & scientific | 2012 |
| Venison NI Ireland Limited | Manufacturing | 2009 |
| Verbal Arts Centre (Northern Ireland) Limited the | Arts & recreation | 1992 |
| Viridescent Energy Limited | Manufacturing | 2024 |
| Visit Derry | Other services | 1995 |
| VN Vehicle Trading Ltd | Wholesale & retail | 2025 |
| WALL2WALL Music C.I.C. | Education | 2010 |
| Walled City Entertainments Ltd | Administrative & support | 2025 |
| Walled City Marathon Ltd | Arts & recreation | 2014 |
| Walled City Music Trust | Arts & recreation | 2009 |
| Walsh Electrical Services Ltd | Construction | 2020 |
| Wanatok Ltd | Information & communication | 2021 |
| Wasdevops NI Ltd | Information & communication | 2020 |
| Waterside Pharmacy Limited - the. | Extraterritorial | 1953 |
| Waterside Shared Village | Other services | 2022 |
| Watsons Meat NI Limited | Wholesale & retail | 2024 |
| WE DO Blinds & Shutters Limited | Construction | 2019 |
| Weaver Logic Consulting Limited | Professional & scientific | 2025 |
| Wellkang EEA Ltd | Professional & scientific | 2020 |
| Wells 60 Ltd | Administrative & support | 2012 |
| Wemac Limited | Real estate | 1997 |
| West END Park Limited | Households | 2025 |