| Two Cocks Farm Limited | Hungerford | 2016 |
| Two Crazy Dog Ladies Ltd | Hook | 2024 |
| Two Fellers Tree Services Ltd | Worcester | 2024 |
| Two Guns Leisure Ltd | Bognor Regis | 2025 |
| Two Oaks Farm Limited | Wickham | 2013 |
| Two Ordinary Fields Limited | Stocksfield | 2024 |
| Two Ponies Limited | Edinburgh | 2024 |
| Two Rivers Sports Ltd | Warminster | 2023 |
| Two Tons Limited | Keighley | 2024 |
| Twomey Farriers Limited | Stanmore | 2018 |
| Twose Farms Limited | Whitland | 2003 |
| Twyford Itchen Watermeadow Limited | Winchester | 2004 |
| Twyford Stud Limited | Ross On Wye | 2006 |
| Twynam and Woods Limited | Harrow On The Hill | 2017 |
| Twynham Ltd | Cardiff | 2021 |
| Twynnings Stables Limited | Redditch | 2024 |
| Twyssenden Manor Estate Limited | Ashford | 2024 |
| TX Protective Coatings Limited | Llanelli | 2018 |
| TXX Limited | Bristol | 2021 |
| TY Cerrig Christmas Tree Farm Limited | Knighton | 2013 |
| TY CI Dog Grooming Ltd | Llanelli | 2024 |
| TY Cynan Farm Ltd | Pwllheli | 2023 |
| TY Isaf Farm Ltd | Newport | 2021 |
| TY Madoc Farm Ltd | Brecon | 2018 |
| TY Mawr Farm & Livery Stables Limited | Cardiff | 2013 |
| TY Mawr Farm Limited | Anglesey | 2018 |
| TY Newydd Trading Company Ltd | Aberdare | 2006 |
| TY Rhiw Farm Ltd | Cardiff | 2019 |
| Ty'N Ddol CYF | Abergele | 2025 |
| Ty'N Y Mynydd Farm Ltd | Ruthin | 2024 |
| Ty'R Sais Stables Ltd | Argoed | 2021 |
| Ty-Fry Ltd. | Porth | 2022 |
| TY1 Ltd | Swanley | 2019 |
| TYB Farms Ltd | Cardigan | 2021 |
| Tyburn Garage,Limited | Balsall Common Coventry | 1928 |
| Tycerrig Limited | Leyland | 1999 |
| Tyddyn CAE Cyfyngedig | Bangor | 2021 |
| Tyddyn Cwcallt Limited | Pwllheli | 2016 |
| Tyddyn Fechan Cyfyngedig | Porthmadog | 2019 |
| Tyddyn Ronnen CYF | Bala | 2022 |
| Tydee Contractors Limited | Gloucester | 2001 |
| Tydee Gardens Ltd | London | 2024 |
| TYE Green Farm Limited | London | 2023 |
| TYE Green Services Limited | Bishops Stortford | 2015 |
| Tyersfishing Ltd | Southampton | 2026 |
| Tyfu Coed Limited | Cowbridge | 2025 |
| Tyfu Eryri CYF | Gwynedd | 2022 |
| Tyfu Prestatyn C.I.C. | Prestatyn | 2025 |
| Tyfwyr Parc Cerrig/Parc Cerrig Growers CBC | Goodwick | 2022 |
| Tygwyn Farm Limited | Cardigan | 2006 |
| Tykesburn Forestry Limited | Moffat | 2025 |
| Tyla Services Limited | Appleby-In-Westmorland | 2009 |
| Tyler & Jo’S Bees Limited | Northolt | 2024 |
| Tyler Cassells Equine Limited | Congleton | 2016 |
| Tyler Cassells Eventing Limited | Congleton | 2026 |
| Tyler Farms Limited | Oakham | 2010 |
| Tyler Woodlands Limited | Faversham | 2023 |
| Tylers Cross Nursery Limited | Hoddesdon | 2011 |
| Tylers Farm Limited | Somerset | 2021 |
| TYN Ffynnon CYF | Abergele | 2023 |
| TYN Gaer Farm Ltd | Tregaron | 2022 |
| TYN Y Caeau Farm Ltd | Caerdydd | 2024 |
| TYN Y Pystyll Farm Contracting Ltd | Wrexham | 2021 |
| TYN YR YNN Farm Limited | Mold | 2015 |
| Tyne Fishing Limited | Hessle | 2014 |
| Tyne Hill Barns Limited | Henlow | 2023 |
| Tyne Hill Farm Limited | Henlow | 2018 |
| Tynedale Farm Services | Wigton | 2026 |
| Tynegrain Agriculture Limited | South Shields | 1982 |
| Tyning Farms (1987) Limited | Bath | 1987 |
| Tyninghame Community Farm CIC | Dunbar | 2023 |
| Tyninghame Sawmill Ltd | Dunbar | 2021 |
| Tynrhos Camping and Fishing Ltd | Lampeter | 2022 |
| Tynycoed Farm Limited | Llanrhos | 2021 |
| TYR Industries Ltd | London | 2019 |
| Tyressan Farm Ltd | Co Tyrone | 2002 |
| Tyrmwg Kennels Limited | Pontyates | 2015 |
| Tyronebull Trans Ltd | Killyman | 2023 |
| Tyson Foods Scotland Europe Limited | Edinburgh | 2001 |
| Tyssen England Ltd | Deal | 2022 |
| Tythe Barn Nurseries Limited | Cumbria | 2002 |
| Tythe Bees Ltd | London | 2022 |
| Tythe Farm Holdings Limited | Frome | 2010 |
| Tythe Farm Limited | Kings Lynn | 1946 |
| Tythe Limited | London | 2022 |
| Tytherton HAY & Straw Ltd | Devizes | 2019 |
| Tytherton Holdings Ltd | Devizes | 2024 |
| Tything Farm Ltd | Bristol | 2025 |
| Tytup Small Holdings Limited | Nr Dalton-In-Furness | 2021 |
| Tywi AI Services Limited | Carmarthen | 2025 |
| TZ Trees and Landscaping Services Ltd | Blackwood | 2025 |
| U & W Tree Surgery Ltd | Peterborough | 2025 |
| U Designer Ltd | London | 2021 |
| U Godsell & Sons Limited | Bristol | 2008 |
| U K Nutrition Limited | Whitchurch | 2007 |
| U Sea Fishing Limited | London | 2021 |
| U.B.F. Grain Store Limited | Widnes | 2011 |
| U.G.J. Haylock & Sons Limited | Haverhill | 1964 |
| U.K. Agrifood Trading Co., Limited | London | 2013 |
| U.K. Biowell Cosmatic Co., Ltd | Manchester | 2021 |