| Tapered Culture Ltd | Other services | 2024 |
| Tapignola Limited | Administrative & support | 2020 |
| Tara Tandoori Ltd | Hospitality | 2021 |
| Tarad Energy Limited | Professional & scientific | 2023 |
| Taranaki Thru Tubing Tools Ltd | Mining & quarrying | 2023 |
| Tarang by GI GI Ltd | Wholesale & retail | 2025 |
| Taranis Energy Limited | Energy | 2024 |
| Targe Environmental Consulting Limited | Professional & scientific | 2017 |
| Targeting Innovation Limited | Professional & scientific | 1993 |
| Targeting Innovation Solutions Limited | Professional & scientific | 2012 |
| Tariffcom Limited | Information & communication | 2001 |
| Tarimyew Limited | Professional & scientific | 1985 |
| Tarlair Investments | Administrative & support | 2019 |
| Tarlair Management Ltd | Mining & quarrying | 2016 |
| Tarlair Property | Extraterritorial | 2023 |
| Tarragon Catering Limited | Hospitality | 2021 |
| Tarragona Inter LP | | 2013 |
| Tartan Four | Financial services | 2019 |
| Task Computer Logic Limited | Information & communication | 1989 |
| Task Fronterra Geomodelling Limited | Administrative & support | 2006 |
| Task Fronterra Geoscience Limited | Administrative & support | 2001 |
| Taste of Italy (Kintore) Ltd | Hospitality | 2019 |
| Tasty Food (Nairn) Limited | Hospitality | 2020 |
| Tasty T'S World Limited | Hospitality | 2016 |
| Tatlers Pubco Limited | Hospitality | 2024 |
| TAU Corp Limited | Professional & scientific | 2021 |
| Taurus Commissioning Limited | Professional & scientific | 2020 |
| Taurx Advanced Therapeutics Limited | Professional & scientific | 2021 |
| Taurx Biological Solutions Limited | Professional & scientific | 2021 |
| Taurx Dynamic Solutions Limited | Financial services | 2021 |
| Taurx Enterprise Synergies Limited | Professional & scientific | 2021 |
| Taurx Hibernia Limited | Professional & scientific | 2022 |
| Taurx Therapeutics Europe Ltd. | Professional & scientific | 2016 |
| Taurx Therapeutics Management Ltd. | Professional & scientific | 2016 |
| Tawakkal Khuda Ltd | Real estate | 2026 |
| Tawakkal Ltd | Wholesale & retail | 2026 |
| Tawco Properties Ltd | Real estate | 2026 |
| Tawse Autoparts Holdings Limited | Financial services | 2025 |
| Tawse Holdings Limited | Financial services | 2025 |
| Tawse Tyre Co Limited | Wholesale & retail | 1978 |
| TAY Pharma Ltd | Wholesale & retail | 2025 |
| Tayhar Properties Limited | Real estate | 2021 |
| Taylor Architecture & Building Consultant Ltd. | Professional & scientific | 2010 |
| Taylored Business Improvements Ltd | Professional & scientific | 2019 |
| Taylored Property Management Limited | Real estate | 2020 |
| Taylors Industrial Services Limited | Water & waste | 1991 |
| Taylorvac Ltd | Construction | 2026 |
| Taylor’S Auto Services Ltd | Wholesale & retail | 2026 |
| Taymount Diving Ltd | Professional & scientific | 2024 |
| Tayprint Limited | Manufacturing | 1977 |
| Tayrose Ltd | Professional & scientific | 2015 |
| Tayside Car Truck & Van Limited | Wholesale & retail | 2021 |
| TB Inspection Services Ltd | Professional & scientific | 2025 |
| TBL Studio Limited | Other services | 2023 |
| Tblaque Limited | Manufacturing | 2023 |
| Tbot Care Dynamics - Aberdeen Ltd | Health & social care | 2024 |
| TBT Financial Group Ltd | Financial services | 2016 |
| TBW Consultancy Services Ltd | Mining & quarrying | 2023 |
| TCO In-Well Technologies UK Ltd | Mining & quarrying | 2009 |
| TD PM Limited | Information & communication | 2013 |
| TDG Logistics Ltd | Transport & logistics | 2021 |
| Teak Technologies Ltd | Information & communication | 2026 |
| TEAL2020 Limited | Other services | 2020 |
| Team a Group Ltd | Professional & scientific | 2023 |
| Team Daylight Limited | Mining & quarrying | 2018 |
| Team Fitness Cycling Studio Ltd | Arts & recreation | 2022 |
| Team Recruitment (Aberdeen) Limited | Administrative & support | 1997 |
| Team Tyler Coaching Ltd | Education | 2024 |
| Team Velocita Ltd | Professional & scientific | 2017 |
| Teamcar (S) L.P. | | 2008 |
| Teamcar 3 (S) L.P. | | 2013 |
| Teamcar 4 (S) L.P. | | 2019 |
| Teaminvest (S) L.P. | | 2008 |
| Teaminvest 3 (S) L.P. | | 2013 |
| Teaminvest 4 (S) L.P. | | 2019 |
| Tease Coffee Bar Limited | Hospitality | 2009 |
| Teasel & Tweed Limited | Wholesale & retail | 2014 |
| Tebsin Ltd | Professional & scientific | 2021 |
| Tech-Terra Ltd | Mining & quarrying | 2020 |
| TECH21 Consultancy Limited | Professional & scientific | 2025 |
| TECH27 Systems Ltd | Information & communication | 2006 |
| Techfest | Education | 2004 |
| Techfriend Ltd | Information & communication | 2024 |
| Techfx Studio Limited | Manufacturing | 2021 |
| Techmak Engineering Limited | Professional & scientific | 2016 |
| Technano Limited | Professional & scientific | 2010 |
| Techneering Limited | Professional & scientific | 2020 |
| Technical Authority Solutions Ltd | Professional & scientific | 2025 |
| Technical Sports Services Ltd | Education | 2020 |
| Techquest Integrated Services Ltd | Professional & scientific | 2022 |
| Techrescue Ltd. | Other services | 2004 |
| Techxpress Ltd | Extraterritorial | 2024 |
| TED09 Limited | Wholesale & retail | 2026 |
| Teddy Couture Ltd | Wholesale & retail | 2021 |
| Tedra Consulting Limited | Professional & scientific | 2011 |
| Tedra Global Ltd | Financial services | 2025 |
| TEE to Green Properties Limited | Real estate | 2025 |
| Teesside Fluid System Technologies Limited | Extraterritorial | 2012 |
| Teesside Valve & Fitting Company Limited | Extraterritorial | 2007 |
| Teetastic Limited | Professional & scientific | 2017 |