| Sorellina Racing Ltd | Llanymynech | 2023 |
| Sorry in Advance Ltd | Coalville | 2024 |
| SOS Equestrian Limited | Surrey | 2018 |
| SOS Farming Ltd | Berwick Upon Tweed | 2017 |
| Soterra Labs Limited | Lancaster | 2025 |
| Soto Polo Ponies Limited | Weston-Super-Mare | 2020 |
| Soton Tree Care Ltd | Southampton | 2025 |
| Sotterley Farms Limited | Beccles | 1973 |
| Sottobella Kennels Ltd | Buxton | 2026 |
| Sough Enterprises Ltd | Richmond | 2026 |
| Soul Farms Limited | Olney | 1960 |
| Soul Fire Project CIC | Swansea | 2019 |
| Soulofagri Ltd | Doncaster | 2024 |
| Sound of Harris Shellfish Limited | Stornoway | 2017 |
| Sound of Luing Bivalve Seafarm Ltd | Lochgilphead | 2018 |
| Sound Shoeing Limited | Maidstone | 2023 |
| South & East Grape Harvesting Ltd | Chelmsford | 2022 |
| South & West Wilts Farmers Collection Ltd | Sherborne | 2014 |
| South Acre Farming Limited | York | 2011 |
| South and West Wales Fishing Communities Limited | Swansea | 2003 |
| South Atlantic Squid (UK) Limited | London | 1998 |
| South Auchronie Farm Ltd | Westhill | 2026 |
| South Birmingham Farm and Plant Sales Ltd | Birmingham | 2026 |
| South Brough Ltd | Shetland | 2023 |
| South Bucks Tree Surgeons Ltd | Thame | 2009 |
| South Coast Bass Lure Open Ltd | Waterlooville | 2025 |
| South Coast Champions Ltd | Brighton | 2025 |
| South Coast Doodles Limited | Southsea | 2021 |
| South Coast Firewood Ltd | Petersfield | 2013 |
| South Coast Fisheries Ltd | Redruth | 2010 |
| South Coast Mussels Limited | Blandford Forum | 1996 |
| South Coast Tree Care Ltd | Shoreham-By-Sea | 2014 |
| South Coast Trees Ltd | Chessington | 2026 |
| South Cumbria Sea Sports Association Limited | Millom | 2007 |
| South Darenth Farms and Cold Store Company Limited | Dartford | 1960 |
| South Devon Bass Guide Ltd | Kingsbridge | 2024 |
| South Devon Chilli Farm Ltd | Kingsbridge | 2004 |
| South Devon Farm & Equine Services Limited | Chudleigh | 2025 |
| South Devon Farriery Limited | Plymouth | 2013 |
| South Devon Firewood Limited | Newton Abbot | 2026 |
| South Devon Fishers Limited | Kingsbridge | 1997 |
| South Dorset Hunt Limited | Wareham | 2017 |
| South Downs Farming Enterprises Ltd | Shoreham-By-Sea | 2018 |
| South Downs Forage & Feeds Limited | Petersfield | 2018 |
| South Downs Real Estate Limited | West Chiltington | 2005 |
| South Downs Venison and Game Limited | Winchester | 2008 |
| South Downs Venison, Game (and Fungi) Ltd | Polegate | 2026 |
| South East Arborists Ltd | Fareham | 2020 |
| South East Forestry and Tree Services Limited | Dorking | 2016 |
| South East Forestry Limited | Dorking | 2002 |
| South East Tree Surgeons Ltd | Dorking | 2021 |
| South East Vineyard Services Ltd | Tenterden | 2024 |
| South East Wales Rivers Trust | Pontypridd | 2007 |
| South Elmham Hall Farms Limited | Harleston | 1965 |
| South Farm Products Limited | Cirencester | 1964 |
| South Fornet Estates Limited | Westhill | 1981 |
| South Group Holdings Ltd | Camberley | 2015 |
| South Hams Fencing Limited | Ivybridge | 2025 |
| South Hams Nursery Stock Limited | Bovey Tracey | 2003 |
| South Hill Farm Smallholding Ltd | Faversham | 2023 |
| South Holland Growing & Packing Ltd | Robertsbridge | 2025 |
| South Holt Farm Limited | Halesowen | 2019 |
| South Lakes Seafood Ltd | London | 2025 |
| South Lakes Sporting Ltd | Torver | 2021 |
| South Lakes Tree Services Limited | Ulverston | 2021 |
| South Lakes Tree Surgeons & Landscapes Limited | Ulverston | 2005 |
| South Lankelly Farm Ltd | St Keyne | 2018 |
| South Leverton Permaculture Limited | Chesterfield | 2021 |
| South Lincs Woodchip and Aggregates Ltd | Spalding | 2022 |
| South Lodge Cottage Limited | Findon | 2016 |
| South Lynch Estate Limited | Winchester | 1988 |
| South Midland Tree Services Limited | Birmingham | 2002 |
| South Notts Hunt Limited | Nottingham | 2008 |
| South of Scotland Seafish Training Association Limited | | 2004 |
| South Ormsby Park Limited | Louth | 2017 |
| South Paddocks Limited | Blandford Forum | 2020 |
| South Park Farm Co Ltd | Haslemere | 2025 |
| South Penquite Farm Limited | Bodmin | 2017 |
| South Quay Shellfish Limited | Llandudno Junction | 2017 |
| South RON Shellfish Ltd | Holm | 2026 |
| South Staffs (Farms) Limited | Hereford | 1961 |
| South Staffs Farms Holdings Limited | Hereford | 1984 |
| South Stock Limited | Grimsby | 2013 |
| South Suffolk LOW Carbon Food Community Interest Company | Ipswich | 2012 |
| South Torfrey Farm Limited | Fowey | 1995 |
| South Uist Estates Limited | South Uist | 1969 |
| South Wales Arborists Ltd | Swansea | 2004 |
| South Wales Hardware Supplies Limited | Cardiff | 2014 |
| South Wales Pest Experts Limited | Swansea | 2021 |
| South Watchlaw Farm Ltd | Duns | 2024 |
| South West Agriculture Limited | Taunton | 2010 |
| South West Aquaculture CIC | Saltash | 2024 |
| South West ARB Ltd | Dumfries | 2017 |
| South West BNG & Habitat Ltd | St. Austell | 2025 |
| South West Chicken Sexers Limited | Stratford-Upon-Avon | 2018 |
| South West Counties Allotment Association Community Interest Company | Barnstaple | 2008 |
| South West England Sustainable Enterprises (Trelay) Limited | Bude | 2007 |
| South West Equine Services Ltd | Taunton | 2025 |
| South West Fallen Stock Ltd | Melksham | 2026 |
| South West Hoof Trimming Ltd | Taunton | 2016 |