| Soho Chinese Takeaway Ltd | Hospitality | 2023 |
| SOLUTION21 Ltd | Financial services | 2017 |
| Sovereign Labelling Machines Limited | Manufacturing | 2018 |
| Sporting Smiles Limited | Health & social care | 2021 |
| SPS Joinery Contracts Limited | Construction | 2018 |
| Spsni Limited | Professional & scientific | 2020 |
| ST Johns Lane Ltd | Households | 2019 |
| Stacks Smashburger Bar Ltd | Extraterritorial | 2021 |
| Station Web Studio Limited | Information & communication | 2017 |
| STE & ZO Limited | Wholesale & retail | 2024 |
| Steamline Cleaners Ltd | Other services | 2020 |
| Stewart Agri Ltd | Agriculture & fishing | 2017 |
| Stewart International Transport Ltd | Wholesale & retail | 2017 |
| Stitchers of Every Stripe Ltd | Professional & scientific | 2025 |
| Stjt Ltd | Transport & logistics | 2016 |
| Stoney Properties Limited | Construction | 2012 |
| Stora Limited | Information & communication | 2021 |
| Stora Software Limited | Financial services | 2021 |
| Store Stuff Holdings Limited | Financial services | 2020 |
| Store Stuff Limited | Wholesale & retail | 2018 |
| Strengthfarm Ltd | Health & social care | 2023 |
| Strictly Boardroom Limited | Professional & scientific | 2016 |
| Studio A1 Ltd | Professional & scientific | 2023 |
| Studio Brew by Amavi Ltd | Hospitality | 2026 |
| Summerfish Press Ltd | Manufacturing | 2020 |
| Synchronise HR Limited | Professional & scientific | 2021 |
| T. P. Andrews Limited | Construction | 2007 |
| Taberah Fire Protection Ltd | Administrative & support | 2020 |
| Tabu Technologies Limited | Information & communication | 2025 |
| Take 6 Limited | Wholesale & retail | 2017 |
| Tandragee Development Initiative Limited | Real estate | 1997 |
| Tanvalley Contracts Limited | Construction | 2022 |
| Tasty Indian Food Ltd | Hospitality | 2024 |
| Tax Freedom Ltd | Professional & scientific | 2011 |
| TCA Construction and Civil Engineer Ltd | Construction | 2017 |
| TEL JUB Finance Ltd | Professional & scientific | 2012 |
| Tending Angels Ltd | Other services | 2024 |
| TH Sparks Ltd | Construction | 2024 |
| THE 70TH Mile Ltd | Hospitality | 2024 |
| THE Baked Potato Ltd | Hospitality | 2016 |
| THE Copper LAB Coffee Limited | Hospitality | 2017 |
| THE Cross Community Company | Other services | 2016 |
| THE Food House (Banbridge) Ltd | Hospitality | 2020 |
| THE Incredible Life International CIC | Administrative & support | 2023 |
| THE Jack Murray Trust T/A the Stig Initiative | Education | 2026 |
| THE Little Petal Florist Ltd | Wholesale & retail | 2021 |
| THE Phone Shop Banbridge Limited | Wholesale & retail | 2024 |
| THE Provincial Banbridge Ltd | Hospitality | 2021 |
| THE Social Club Studio Limited | Professional & scientific | 2023 |
| THE Social Sauna Ltd | Other services | 2025 |
| THE Suddy Dog Grooming Co Ltd | Other services | 2025 |
| THE Suddy Dog NI Ltd | Other services | 2023 |
| THE Suddy Dog Rehab Fund Ltd | Other services | 2025 |
| THE Suddy Dog Rehabilitation Centre NI Ltd | Other services | 2025 |
| THE Vault Pizza Ltd | Hospitality | 2014 |
| THE Walk in Wardrobe Online Ltd. | Wholesale & retail | 2017 |
| Thomas Ferguson & Company, Limited | Manufacturing | 1884 |
| Thompson Tyres Limited | Wholesale & retail | 2006 |
| Tile Tech Direct Limited | Wholesale & retail | 2007 |
| Tinsley Transport Ltd | Transport & logistics | 2011 |
| Tiny Tornadoes Ltd | Arts & recreation | 2023 |
| Tisaro Ltd | Wholesale & retail | 2008 |
| Titan Building Supplies & Hire Limited | Wholesale & retail | 2022 |
| TMG Contracts Ltd | Construction | 2022 |
| Tobi & Peanut Ltd | Other services | 2022 |
| Tomorrow Financial Solutions Limited | Administrative & support | 2010 |
| Townaccess Investments Limited | Administrative & support | 2006 |
| TQ360 (HC) Limited | Administrative & support | 2018 |
| Tracey Mckay Designs Ltd | Professional & scientific | 2024 |
| Trade CUT NI Limited | Manufacturing | 2026 |
| TRB Commerce Limited | Wholesale & retail | 2024 |
| Trimble Affordable Properties Ltd | Real estate | 2015 |
| Trimfold Envelopes (Northern Ireland) Limited | Manufacturing | 2018 |
| Trustafarian Ltd | Wholesale & retail | 2023 |
| Tullyraine Equine Clinic LLP | | 2015 |
| Tullyraine Quarries, Limited | Mining & quarrying | 1958 |
| Tullyraine Recycling Limited | Extraterritorial | 2009 |
| Tullyskeagh Wind Farm Ltd | Energy | 2015 |
| Udytex Enterprises Ltd | Wholesale & retail | 2020 |
| Ultonia Arts C.I.C. | Education | 2017 |
| Ultratherm Conservatories Limited | Construction | 2018 |
| Uncapped Marketing Limited | Professional & scientific | 2018 |
| UNI Creative Ltd | Professional & scientific | 2022 |
| Vanturex Ltd | Construction | 2024 |
| Vapour Distilled Pure Water Ltd | Water & waste | 2015 |
| Ventec Ireland Ltd | Professional & scientific | 2017 |
| Vibrant Marketing (NI) Limited | Extraterritorial | 2004 |
| Vienna Gambit Limited | Professional & scientific | 2022 |
| Vigilant Anaesthesia Ltd | Agriculture & fishing | 2026 |
| Vinder Capital Limited | Financial services | 2017 |
| Vine Trusted Housing Ltd | Households | 2023 |
| Vintage Violet Floral Boutique Ltd | Wholesale & retail | 2022 |
| Voltar Investments Limited | Construction | 2019 |
| Wallace Bros. Haulage Ltd | Transport & logistics | 2004 |
| Wardmed Ltd | Health & social care | 2025 |
| Water Drops Partnership Ltd | Other services | 2022 |
| Watson's Fort Management Company Limited | Households | 2025 |
| Waylines Wholesale Ltd | Wholesale & retail | 2025 |
| Wealth Hacks Media Limited | Professional & scientific | 2025 |
| Weavers Abode Ltd | Real estate | 2026 |