| Supreme Fishing Company Limited | Kilkeel | 1988 |
| Supriya Bhatla Ltd | Glasgow | 2024 |
| Surasooya Limited | Heywood | 2021 |
| Surefields Farming Chichester Ltd | Chichester | 2025 |
| Surefields Farming Limited | Chichester | 2010 |
| Surefly Limited | Bedworth | 2012 |
| Surekill Limited | Melrose | 2003 |
| Surenough Limited | Dorchester | 1983 |
| Suretree Limited | Newcastle Upon Tyne | 2017 |
| Surf & Sun Ltd | St Ives | 2015 |
| Surfdyne Limited | Liphook | 1992 |
| Surmah Valley Tea Company Limited | Near Sevenoaks | 1897 |
| Surman Agriculture Limited | Oxford | 2017 |
| Surman Land Limited | Oxford | 2024 |
| Surrey Bees Training Limited | Liphook | 2024 |
| Surrey Ecofarm Ltd. | Guildford | 2021 |
| Surrey Forestry Limited | Leatherhead | 2010 |
| Surrey Hills Equine Ltd | Bramley | 2022 |
| Surrey Hills Honey Company Ltd | Cobham | 2018 |
| Surrey Hills Mushrooms Limited | Dorking | 2025 |
| Surrey Hills Orchards Limited | Guildford | 2013 |
| Surrey Honey Farm Limited | Chessington | 2016 |
| Surrey Pet Adventures Limited | Chertsey | 2023 |
| Surrey Tree Care Limited | Leatherhead | 2003 |
| Surrey Tree Services Ltd | Epsom | 2024 |
| Surrey Tree Specialist Ltd | Walton-On-Thames | 2020 |
| Survival Training School Limited | Cardiff | 2011 |
| Susa Fishing Limited | Devon | 2000 |
| Susi.M Fishing Company Limited | Fraserburgh | 2003 |
| Susian Limited | Fraserburgh | 2006 |
| Susie Berry Eventing Ltd | Kettering | 2019 |
| Susilva Ltd | Grantham | 2012 |
| Sussex Agri Power Limited | Chichester | 1989 |
| Sussex Arbor Pro Limited | Hailsham | 2012 |
| Sussex Boat Fishing and Boat Deliveries Ltd | Worthing | 2017 |
| Sussex Bully’S Limited Ltd | Horsham | 2021 |
| Sussex Car Storage Limited | Horsham | 2010 |
| Sussex Countryside Management Ltd | Pulborough | 2010 |
| Sussex Countryside Services Ltd | Battle | 2019 |
| Sussex Equestrian Centre Limited | East Grinstead | 2003 |
| Sussex Equestrian Sales Limited | Haywards Heath | 2014 |
| Sussex Equine Massage Therapy Limited | Brighton | 2024 |
| Sussex Game Group Limited | Andover | 1976 |
| Sussex Grown Limited | London | 2023 |
| Sussex Harvest Ltd | Pulborough | 2026 |
| Sussex Horse Sanctuary CIC | Brighton | 2024 |
| Sussex Lavender Ltd | Polegate | 2023 |
| Sussex Logs Ltd | Rowhook | 2020 |
| Sussex Logs, Landscaping & Forestry Ltd | Eastbourne | 2022 |
| Sussex Lusitanos Ltd | Ifold | 2026 |
| Sussex Offshore Fishing Charters Ltd | Horsham | 2008 |
| Sussex Prairies Ltd | Henfield | 2005 |
| Sussex Rural Services Limited | Haywards Heath | 2021 |
| Sussex Saffron Ltd | London | 2020 |
| Sussex SAR for Lost Dogs CIC | Bognor Regis | 2022 |
| Sussex Sport Horses Limited | Horsham | 2020 |
| Sussex Tree Works Ltd | Hove | 2022 |
| Sussex Trug Heritage Centre Limited | Herstmonceux | 2023 |
| Sussex Wildlife Trust | Brighton | 1961 |
| Sustain Operations Community Interest Company | Swindon | 2025 |
| Sustain Wiltshire Limited | Swindon | 2022 |
| Sustainable Agronomy Limited | Mansfield | 2001 |
| Sustainable Aquafarms Limited | Helsby | 2019 |
| Sustainable Communities Hulme C.I.C. | Manchester | 2022 |
| Sustainable Energy Environment Ltd | Abingdon | 2013 |
| Sustainable Farming Ltd | Lichfield | 2017 |
| Sustainable Farming Yorkshire Limited | Bradford | 2022 |
| Sustainable Feeds Limited | North Shields | 2014 |
| Sustainable Fibre Alliance | Mold | 2015 |
| Sustainable Forest Management Limited | Aberystwyth | 1998 |
| Sustainable Honey Bees CIC | Carmarthen | 2024 |
| Sustainable Hydro Holdings Limited | Nottingham | 2025 |
| Sustainable Living Alliance Limited | Stroud | 2013 |
| Sustainable Planet Solutions Limited | Swindon | 2024 |
| Sustainable Seafood Cornwall Ltd | Penryn | 2025 |
| Sustainable Shell-Fish Limited | Llangenech | 2022 |
| Sustainable Squid Fishing Limited | Teesside | 2014 |
| Sustainable Thinking Scotland CIC | Falkirk | 2016 |
| Sustainable Timber Ltd | Darlington | 2016 |
| Sustainable Woodchip Ltd | Frodsham | 2021 |
| Sustainablefarm Innovations Ltd | Sheffield | 2023 |
| Sutcliffe Farmers Limited | Bawtry | 1976 |
| Sutcliffe Wallace Limited | Middlesbrough | 2002 |
| Sutherland & Co (Old Craig) Ltd | Inverurie | 2011 |
| Sutherland Christmas Trees Limited | Nr. Eccleshall | 1996 |
| Sutherland Community Seaweed CIC | Lairg | 2025 |
| Sutherland Farms (Holdings) Limited | Sheffield | 2011 |
| Sutherland Farms Limited | South Yorkshire | 1999 |
| Sutherland Fishing Ltd | Elgin | 2014 |
| Sutherland Partners Ltd | Braintree | 2013 |
| Suthra VOE Shellfish Limited | Shetland | 2006 |
| Sutton & Tawney Estates Farming Limited | Epping | 2023 |
| Sutton 1079 Limited | London | 2022 |
| Sutton Coldfield Treeworks Ltd | Sutton Coldfield | 2017 |
| Sutton Collection Holdings Limited | London | 2022 |
| Sutton Estates Group Limited | London | 2023 |
| Sutton Family Estates Limited | London | 2023 |
| Sutton Farm Cheshire Ltd | Chester | 2013 |
| Sutton Farms and Estates Limited | London | 2022 |
| Sutton Farms Ltd | Biggleswade | 2007 |