| Tobermory Oysters Limited | North Berwick | 2014 |
| Toby Baxter Farming Ltd | Chedworth | 2026 |
| Toby Brand Agriculture Ltd | Rickmansworth | 2024 |
| Toby Cambray Property Ltd | Bradford-On-Avon | 2012 |
| Toby Ford Ltd | Wells | 2012 |
| Toby Stone Tree Surgeon Ltd | Croydon | 2021 |
| Tocher Fishing Ltd. | Aberdeenshire | 2005 |
| TOD Forge & Carriage Ltd | Blackpool | 2025 |
| Todd Farms Ltd | Peterborough | 2018 |
| Todd's Nursery Limited | London | 2016 |
| Toddington Garden Centre Limited | Cheltenham | 2019 |
| Toddington Nurseries Limited | Bognor Regis | 2011 |
| Toddingtons Limited | Northampton | 1985 |
| Toddy Knowes Limited | Berwick-Upon-Tweed | 2023 |
| Todhill Game Ltd | Perth | 2023 |
| Todhunter Limited | Beccles | 2019 |
| Toft Farm Growers Limited | Taunton | 2016 |
| Toft Farm Limited | Rugby | 1997 |
| Toft Farming Limited | Spalding | 2019 |
| Toilled Ltd | Selby | 2012 |
| TOK Trading Limited | Shaftesbury | 2010 |
| Toke Farm Ltd | Maidstone | 2021 |
| Toland Distribution Ltd | Newry | 2019 |
| Toldish Group Ltd | Truro | 2020 |
| Tolhurst Organic Partnership C.I.C. | Reading | 2014 |
| Toli Field Sports Limited | Stone | 2023 |
| Toll Rides (OFF Road) Trust | Tenterden | 1992 |
| Tollemache Farms Limited | Stowmarket | 1970 |
| Toller Tree Care Ltd | Dorchester | 2020 |
| Tollgate Farming Limited | Devon | 1995 |
| Tollgate Farms Limited | Solihull | 2016 |
| Tolliday Aquatic Solutions Ltd | London | 2025 |
| Tollymore Farms Ltd | Castlewellan | 2024 |
| Tolman Enterprises Limited | Pymoor | 2013 |
| Tolstoy Ltd | London | 2018 |
| Toluwa Creations Ltd | London | 2024 |
| TOM & Jerry Pestcontrol Limited | West Drayton | 2025 |
| TOM Barron Farms Limited | Preston | 1969 |
| TOM Barton Farms Ltd | Retford | 2014 |
| TOM Boswell Tree Services Limited | London | 2008 |
| TOM Bunting Vineyard Management Limited | Colchester | 2016 |
| TOM Chugg Contracting Ltd | Droitwich | 2007 |
| TOM COX Ltd | Stanstead Abbotts | 2009 |
| TOM Dirom Agricultural Contractors Limited | Otley | 2011 |
| TOM Farrow Tree Specialists Limited | Caddington | 2024 |
| TOM Festing Services Ltd | Taunton | 2020 |
| TOM Floyd & SON Ltd | Kilmarnock | 2023 |
| TOM Gilman Farms Limited | Oakham | 2000 |
| TOM Goddard and Sons Limited | Halifax | 2000 |
| TOM Gooders Tree Surgery Ltd | Bexhill-On-Sea | 2020 |
| TOM Haylock & Co.Limited | Cambridge | 1951 |
| TOM Lewis Contracting Limited | Welshpool | 2013 |
| TOM Lomas Livestock Consultants Ltd | Kettering | 2013 |
| TOM MAC Stud Ltd | Chislehurst | 2017 |
| TOM Mercer Ltd | Burton-On-Trent | 2018 |
| TOM MOR Limited | Grantown On Spey | 2023 |
| TOM NA Croise Farms Ltd | Garelochhead | 2024 |
| TOM Negus Tree Care Ltd | Banbury | 2025 |
| TOM Parker Farms | Southampton | 1949 |
| TOM Patrick Tree Services Limited | Salisbury | 2015 |
| TOM Pugh Contracting Limited | Bridgend | 2025 |
| TOM Robinson Sprays Limited | Cambridge | 2014 |
| TOM Saltmarsh Racing Ltd | London | 2017 |
| TOM Smith Farrier Ltd | Okehampton | 2023 |
| TOM Williamson Agriculture Ltd | Brigg | 2013 |
| Tom's Dairies Ltd | Kidwelly | 2022 |
| Tom's Greenhouse Limited | London | 2025 |
| Tomhead Limited | Hereford | 1974 |
| Tomkins Ltd | Todmorden | 2020 |
| Tomkinson Farms Limited | Staffordshire | 2006 |
| Tomlinson Bilsrow Limited | Preston | 2018 |
| Tomlinson Equine Limited | Tetbury | 2007 |
| Tomlinson Farms Limited | Consett | 2014 |
| Tomlinson Trees Contractors Limited | Paignton | 2018 |
| Tommy Ireland Ltd | Langholm | 2016 |
| Tommy Mcroberts Ltd | Dromore | 2022 |
| Tommy Tulloch Limited | Orkney | 2006 |
| Tomnah'A Market Garden Ltd | Crieff | 2015 |
| Tomorrows Canopies Limited | Oban | 2026 |
| Tomorrows Forests Limited | Bury | 2014 |
| Tompsett Growers Limited | Ely | 2000 |
| Tompsett Holdings Limited | Ely | 2002 |
| Toms Farms Limited | Knutsford | 2003 |
| Toms Hand Dived Scallops Ltd | Oban | 2022 |
| Toms Hedges Limited | Bristol | 2003 |
| Tomtom Services Ltd | Sherborne | 2009 |
| Tom’S Logs & Firewood Limited | Wirral | 2025 |
| Tondy’S Doggy Daycare Ltd | Hove | 2025 |
| Tone Valley Services Limited | Wellington | 2012 |
| Tongswood Gardens Limited | Stevenage | 2025 |
| Tony Butler Limited | Gloucestershire | 2005 |
| Tony Lock Limited | Langport | 2008 |
| Tony Nerses Ltd | Edgware | 2015 |
| Tony Parry & Sons Limited | Chester | 2013 |
| Tony Pockley Limited | Bridlington | 2007 |
| Tony Powell Farm Limited | Ammanford | 2026 |
| Tony Singleton Limited | Cumbria | 2003 |
| Tony Weir Contractor Limited | Elgin | 2016 |
| Tooby Agricultural Services Ltd | Bury St. Edmunds | 2018 |
| Tool Sharp Limited | Stanford-Le-Hope | 2013 |