| THE Breathing Room Ltd | Health & social care | 2021 |
| THE Capacity Exchange Ltd | Information & communication | 2025 |
| THE Crannogs Management Limited | Households | 2017 |
| THE Creatures Grip Limited | Wholesale & retail | 2026 |
| THE Data Innovation Hub Limited | Information & communication | 2023 |
| THE Designworks Studio Ltd | Construction | 2007 |
| THE Dog Bark Ltd | Agriculture & fishing | 2022 |
| THE Emdrevolution Ltd | Health & social care | 2023 |
| THE Emmanuel Churches Trust | Other services | 2015 |
| THE Fine Coffee Co. Limited | Hospitality | 2017 |
| THE Flowers Shop Limited | Wholesale & retail | 2018 |
| THE Football Academy NI Ltd | Education | 2026 |
| THE Forge Ballygowan Management Company Limited | Households | 2010 |
| THE Gallery Hair Consultants Ltd | Other services | 2023 |
| THE Glensman Ltd | Hospitality | 2021 |
| THE Gourmet Grill Chippy Ltd | Hospitality | 2022 |
| THE Grange Christian Retreat Limited | Other services | 2016 |
| THE Great Outdoor Barbecue Company Limited | Wholesale & retail | 2016 |
| THE Haelan Space Ltd | Health & social care | 2025 |
| THE Hall Verlaque Co Ltd | Wholesale & retail | 2023 |
| THE Home Solution Shop Ltd | Construction | 2021 |
| THE Hungry Hooker Ltd | Other services | 2024 |
| THE JEM Community Ltd | Wholesale & retail | 2018 |
| THE Library Group Ltd. | Administrative & support | 2015 |
| THE Little Magic Ball Company Ltd | Manufacturing | 2024 |
| THE Lodge Management Company (Waringstown) Limited | Households | 2007 |
| THE Lyttle Windmill Company Limited | Real estate | 2017 |
| THE Magpie’S Corner Limited | Manufacturing | 2018 |
| THE Malawi Projects International Ltd | Other services | 2023 |
| THE Marine Tavern Limited | Hospitality | 2020 |
| THE Mcclay Foundation | Professional & scientific | 2008 |
| THE Mcclay Foundation Corporate Trustee Limited | Professional & scientific | 2008 |
| THE Meat Centre (Moira) Limited | Wholesale & retail | 2022 |
| THE Mill (Portadown) Limited | Arts & recreation | 2017 |
| THE Mill Cafe and Bagel Bar Stranmillis Ltd | Hospitality | 2023 |
| THE Mill Café and Bagel Bar Ltd | Hospitality | 2023 |
| THE North Armagh Motorcycle and Car Club (Tarmac Section) Limited | Arts & recreation | 2011 |
| THE Official Winners WIN Ltd | Wholesale & retail | 2024 |
| THE One Hygiene Limited | Professional & scientific | 2023 |
| THE Plant Based Ball Company Ltd | Manufacturing | 2024 |
| THE Point Offsales Limited | Wholesale & retail | 2019 |
| THE Research Train Ltd | Professional & scientific | 2016 |
| THE Secper Consultancy Limited | Administrative & support | 2020 |
| THE Shorelands Management Co. Ltd | Households | 2017 |
| THE Short Shift Limited | Manufacturing | 2018 |
| THE Skin Health Clinic Ltd | Other services | 2016 |
| THE Trinity Gift Shop Ltd | Wholesale & retail | 2025 |
| THE Trucorp Group Limited | Financial services | 2020 |
| THE Wesley Trust (High Street Methodist) Lurgan | Administrative & support | 2009 |
| THE Wildlings Podcast Ltd | Information & communication | 2026 |
| THE Yellow Door (Portadown) Ltd | Hospitality | 2003 |
| Theclockworks Ltd | Administrative & support | 2007 |
| Therapeuo Ltd | Health & social care | 2018 |
| Therapies for Education Ltd | Health & social care | 2024 |
| Thermal Bead Screed Floors Limited | Manufacturing | 2020 |
| Thetopshop Ltd | Wholesale & retail | 2023 |
| Thick AS Thieves Streetwear & Graffiti Supplies Ltd | Manufacturing | 2018 |
| Think Deep Ltd | Information & communication | 2012 |
| Thomas James Stewart Ltd | Construction | 2024 |
| Thompson Aero Seating Limited | Manufacturing | 1997 |
| Thornbrook Farm Eggs Ltd | Agriculture & fishing | 2016 |
| Thornbrook Properties Ltd | Real estate | 2021 |
| Thornbrook Property Management Ltd | Real estate | 2021 |
| Thornhill Haven Ltd | Hospitality | 2021 |
| Three Elephants Pizza Limited | Hospitality | 2025 |
| Three Sixty Survey Services Limited | Professional & scientific | 2003 |
| Three's a Crowd Ltd | Arts & recreation | 2013 |
| Tiger Investments (NI) Limited | Real estate | 2003 |
| Tile Market Limited | Extraterritorial | 2011 |
| TIM Mullen Racing Limited | Arts & recreation | 2002 |
| Tirowen Properties Ltd | Real estate | 2012 |
| Titan S&C Ltd | Arts & recreation | 2023 |
| Titanic Consultancy Limited | Information & communication | 2019 |
| Titus Attachments Ltd | Manufacturing | 2022 |
| Titus Solutions Ltd | Manufacturing | 2016 |
| Tivanagh Holdings Limited | Transport & logistics | 2014 |
| TJ SAM DB Consultants Limited | Manufacturing | 1946 |
| TJF Property Ltd | Real estate | 2023 |
| TK Consultancy (NI) Limited | Administrative & support | 2006 |
| Tkdnikb CIC | Arts & recreation | 2025 |
| TLL Associates Limited | Professional & scientific | 2016 |
| TM Cattle Ltd | Agriculture & fishing | 2021 |
| TMC Distribution (NI) Limited | Transport & logistics | 2014 |
| Tmore Holdings Limited | Professional & scientific | 2018 |
| Tobar Catering Limited | Hospitality | 2011 |
| TOM Stephenson Architect Limited | Extraterritorial | 2006 |
| Tommy French Bookmakers Ltd | Arts & recreation | 2005 |
| Tommy Hughes Transport Limited | Transport & logistics | 2010 |
| Tonaid Limited | Wholesale & retail | 2014 |
| Toner Mcdowell Ltd | Professional & scientific | 2011 |
| Tonypleavin.Com Limited | Other services | 2011 |
| Topcoat Coatings Limited | Manufacturing | 2023 |
| Total Care Recruitment Ltd | Administrative & support | 2017 |
| Total Claim Solutions NI Limited | Professional & scientific | 2022 |
| TOW Brothers Ltd | Wholesale & retail | 2015 |
| Trace First Limited | Information & communication | 2007 |
| Traceydee Limited | Wholesale & retail | 2021 |
| Trade Signs Ireland Ltd | Manufacturing | 2024 |
| Trade Signs Ltd | Manufacturing | 2024 |
| Tradewise Lurgan Limited | Wholesale & retail | 2025 |