| Springwood Turf & Landscaping Limited | Oundle | 2002 |
| Sprinkle Farms Limited | Carmarthen | 2002 |
| Sprout Co-Op Limited | Derby | 2021 |
| Sprout UP Schools CIC | London | 2020 |
| Sprouts and Harvest Ltd | London | 2022 |
| Sproutspace CIC | London | 2025 |
| Spruce & Hawe Limited | York | 2005 |
| Spruce Farm Ltd | Mold | 2019 |
| Spryder Ltd | Northchurch | 2016 |
| SPT NI Capital Limited | Belfast | 2021 |
| Spurgeon Pigs Limited | Norfolk | 2002 |
| Spurrs Limited | Brighton | 2022 |
| SPY Hill Trees Limited | Chester | 2016 |
| Spynie Farmers Limited | Elgin | 1988 |
| Squabmoor Farm Limited | Exmouth | 2010 |
| Square Meadow Ltd | Ludlow | 2011 |
| Square Mile Farms Limited | London | 2018 |
| Squaroll Ltd | London | 2025 |
| Squids Gate Farm Ltd | Ashford | 2025 |
| Squiggledax Ltd | Cardiff | 2019 |
| Squire House Limited | Knowle Green | 2011 |
| Squires Meadow Limited | Craven Arms | 2022 |
| Squires of Ashley Limited | Northampton | 2016 |
| Squirrel Marine Ltd | Sittingbourne | 2012 |
| Squirrel Woodland Rural Industries Ltd | Sittingbourne | 2011 |
| Squirrels Architecture and Agroecology Ltd | Watchet | 2019 |
| Squirrels Hall Fruit Farm | Colchester | 1968 |
| SR & CED Morgan (Poultry) Ltd | Leominster | 2021 |
| SR Farm Ltd | Fenwick | 2023 |
| SR Farm Trading Ltd | Dungannon | 2020 |
| SR Fishing Ltd | Cleethorpes | 2022 |
| SR Holdings Yorkshire Ltd | Barnsley | 2025 |
| SR Morrison Ltd | Aberdeen | 2022 |
| SR Woodcraft Ltd | Hayling Island | 2019 |
| SRB (Lincs) Ltd | Spilsby | 2014 |
| SRB Campbell Limited | Clogher | 2012 |
| Srbj Ltd | Swansea | 2022 |
| SRD Fishing Limited | Brixham | 2026 |
| SRE Farms Limited | Dungannon | 2025 |
| Srest Consultancy Services Ltd | Edinburgh | 2010 |
| SS ARB Tree Solutions Limited | Perth | 2015 |
| SS Equine Ltd | Newry | 2022 |
| SS Farms Ltd | Dungannon | 2018 |
| SS Landscaping Ltd | Blyth | 2026 |
| SS Stable Livery Limited | Faringdon | 2025 |
| SS2 Group Limited | Tunbridge Wells | 2013 |
| SSA Fishing Limited | Kilkeel | 2018 |
| SSF Hjaltland UK Limited | Stirling | 1995 |
| SSF Shetland Limited | Stirling | 1985 |
| SSH Equestrian Group Limited | Haslingden | 2021 |
| SSI Farms Limited | Ballyclare | 2019 |
| Ssingeco Ltd | Bradford | 2020 |
| SSL Equestrian Limited | Leamington Spa | 2017 |
| Sslp Holdings Ltd | Perth | 2021 |
| ST & AM Dennis Ltd | Devon | 2002 |
| ST & RT LEE Ltd | Wigton | 2024 |
| ST Abbs Marine Research Ltd | St Abbs | 2025 |
| ST Agriculture Ltd | Fraserburgh | 2020 |
| ST Aidans Allotments Limited | Carlisle | 2013 |
| ST Albans Bloodstock Limited | London | 2013 |
| ST Albans Seed Tray CIC | St. Albans | 2025 |
| ST Andrews Harbour Fishing Limited | Leven | 2006 |
| ST Andrews Harbour Shellfish Ltd | Dundee | 2017 |
| ST Andrews Seafoods Limited | Cupar | 2015 |
| ST Andrews Shellfish Ltd | Dundee | 2016 |
| ST Athanasius Farm Limited | Scarborough | 2016 |
| ST Bloodstock Ltd | Northallerton | 2023 |
| ST Botolphs Free Range Turkey Limited | Haverfordwest | 2020 |
| ST Botolphs Organic Turkey Limited | Haverfordwest | 2020 |
| ST Brides Bay Trading Company Ltd | Haverfordwest | 2024 |
| ST Clair Farms | Orkney | 1997 |
| ST EWE Agriculture Limited | Truro | 2026 |
| ST George's Nursery Company Limited | Feltham | 1935 |
| ST Giles Farms Limited | Wimborne | 1961 |
| ST Ives Lakes Limited | St Ives | 2008 |
| ST James Stables Equestrian Limited | Cowbridge | 2010 |
| ST John's Market Ltd | Liverpool | 2020 |
| ST Johns Nurseries (Kirby Bellars) Limited | Tunbridge Wells | 2007 |
| ST Johns Nursery (Clacton) Ltd | Barnet | 2012 |
| ST Just Farms Limited | Nottingham | 1996 |
| ST Lawrence Vineyard Limited | Oldham | 2023 |
| ST Leonards Farm Limited | Manchester | 2021 |
| ST LOE Limited | Bournemouth | 2012 |
| ST Margarets Meadow Farm CIC | Quarry Bank | 2023 |
| ST Marys Hall Farming Company Limited | Colchester | 2013 |
| ST Milton Limited | Bourne | 2019 |
| ST Nicholas Estate Trading Ltd | Richmond | 2026 |
| ST Pancras Renewables Ltd | Boston | 2023 |
| ST Quintin's Creamery Ltd | Driffield | 2008 |
| ST. Barr Fishing Ltd | Fraserburgh | 2018 |
| ST. Bridget Nurseries Limited | Exeter | 1976 |
| ST. Catherines Supplies Ltd. | Corsham | 1997 |
| ST. Eloy Ltd | Devizes | 2026 |
| ST. Isidore Agriculture Ltd | Honiton | 2015 |
| ST. Marys Livestock Transport Ltd | Towcester | 2011 |
| ST. Mary’S Advance Ltd | Leicester | 2026 |
| ST. Merryn Community Gardens Trust Limited | Padstow | 2009 |
| ST. Nicholas Court Farms Limited | Birchington | 2008 |
| ST. Norbert Limited | London | 1997 |
| St.Lawrence Hall Farms Limited | Lawrence | 1963 |