| Saxondale Doggy Daycare Ltd | Melton Mowbray | 2026 |
| Saxtead Livestock Ltd | Steyning | 2012 |
| Sayama Tea Estates Limited | London | 1946 |
| Saycells Farm Limited | London | 2020 |
| Sayenchi Ltd | Brixham | 2019 |
| SB Agri Contractors Ltd | Southminster | 2019 |
| SB Baker Feeds Limited | Devon | 2005 |
| SB Equine Therapy Limited | Hull | 2018 |
| SB Farming Ltd | Ross-On-Wye | 2026 |
| SB Farms Ltd | Cwmbran | 2021 |
| SB Forestry Ltd | Edinburgh | 2018 |
| SB Sea Foods Ltd | Chichester | 2025 |
| SBR Energy Ltd | Scunthorpe | 2024 |
| SBR Foxhills Limited | Blackpool | 2017 |
| SBR Hire Ltd | Scunthorpe | 2024 |
| SBS Farming Limited | Bordon | 2023 |
| SC Farming Limited | Lanark | 2022 |
| SC Mechanical & Agri Solutions Ltd | Stirling | 2018 |
| SC Pet Services Limited | Plymouth | 2025 |
| SC Refrigeration Ltd | Skipton | 2021 |
| SC Wood Chipping Ltd | Enniskillen | 2025 |
| Scala Equestrian Products Ltd | Sandbach | 2021 |
| Scalable Solution Ltd | London | 2024 |
| Scald Produce Ltd | Hamilton | 2026 |
| Scaleport Limited | Solihull | 1978 |
| Scales RYE Limited | Bexhill On Sea | 2010 |
| SCALES2TAILZ Limited | Loanhead | 2025 |
| Scaling Firewood Company Ltd | Saltburn-By-The-Sea | 2018 |
| Scallop Ranch Ltd | Southampton | 2014 |
| Scalloptech Limited | London | 2015 |
| Scally Ltd | Fraserburgh | 2018 |
| Scallywags School for Dogs Ltd | Southampton | 2017 |
| Scalp View Farms Ltd | Omagh | 2014 |
| Scalpsie Ltd | Isle Of Bute | 2023 |
| Scampston Farming Company Limited | Malton | 1972 |
| Scandi Tech Ltd | Edinburgh | 2014 |
| Scane and Sons Limited | Oxford | 2019 |
| Scantlebury Farm Services Limited | Hertfordshire | 2006 |
| Scantlebury Farms | Royston | 1985 |
| Scantlebury Manwood | Harlow | 1985 |
| Scarab Solutions Ltd | Southampton | 2015 |
| Scarbattan Farms Limited | Scarborough | 1974 |
| Scarborough Farm Limited | Lincoln | 2018 |
| Scarborough Marine Services Ltd | Scarborough | 2025 |
| Scargill Farm Limited | Morecambe | 2023 |
| Scarisbrick Hall Limited | Ormskirk | 2006 |
| Scarisbrick Nurseries Plant Centre Ltd | Southport | 2004 |
| Scaristavore Crofting Trust Limited | Stornoway | 1999 |
| Scarlett Rose Equestrian Limited | Bristol | 2024 |
| Scarr END Mill Farm Estates Limited | Dewsbury | 2011 |
| Scarth Nick Farms Ltd | Leyburn | 2022 |
| Scarva Buying Group Ltd | Newry | 2002 |
| Scawby & South Ferriby Estate Company | Brigg | 1925 |
| Scawfell Genetics Limited | Grantham | 2017 |
| Scawton Sawmill Limited | Thirsk | 2012 |
| Scdocumentation Ltd | Wrexham | 2019 |
| Scenic Farms Limited | Bicester | 2017 |
| Scentral Bark Ltd | Ellon | 2022 |
| SCF Fabrication Ltd | Wellington | 2017 |
| Scfm Ltd | Bristol | 2018 |
| SCG Agri Services Ltd | Diss | 2012 |
| Schiltron Equine Ltd | Thatcham | 2020 |
| Schivas Estates Limited | Aberdeen | 1947 |
| Schneider Youngplants Limited | Worcestershire | 2020 |
| Schofield Services Ltd | London | 2025 |
| Scholland Farm Ltd | Shetland | 2015 |
| School Farm Community Supported Agriculture C.I.C. | Totnes | 2013 |
| School of National Equitation Limited | Loughborough | 1974 |
| Schroeder Farms Limited | Melton Mowbray | 1997 |
| Schulenberg Farms Limited | Horsham | 1983 |
| Schway Limited | Cardiff | 2019 |
| Schwier Farms Limited | Ongar | 1953 |
| Sci-Tech Laboratories Limited | Bracknell | 2005 |
| Sciberscross Woodlands Limited | Tain | 2004 |
| Science Toll Ltd | Bootle | 2025 |
| SCIENCE2MARKET Ltd | Chipping Norton | 2018 |
| Scientiag International Limited | Halstead | 2019 |
| Scientific Horseshoeing Limited | Stoke-On-Trent | 2021 |
| Scion Fruits Limited | Borough Green | 2017 |
| SCL Global Limited | London | 2021 |
| Sclater Estates Limited | Sussex | 1921 |
| Sclater Farming Limited | East Sussex | 2023 |
| Sclenn Ltd | Armagh | 2025 |
| SCM Services (Berkshire) Ltd | Berkshire | 2014 |
| SCO Ruston Farms Limited | Norwich | 1979 |
| Scocles Farms Limited | East Sussex | 1986 |
| Scodo Equine Ltd | Newry | 2024 |
| Scone Polo Limited | Haslemere | 2019 |
| Scooby & Co Ltd | Marlborough | 2025 |
| Scoones Partnership Limited | Halesworth | 2010 |
| Scoor Estate Limited | Crieff | 1996 |
| Scoperties Limited | Linlithgow | 2017 |
| Scorborough Sporting Limited | Beverley | 2008 |
| Scorpius Fishing Ltd | Scalloway | 2014 |
| Scorror Farms Limited | Lincolnshire | 2001 |
| Scot West Shellfish Ltd | Glasgow | 2014 |
| Scot-Hatch Limited | Achnasheen | 2013 |
| Scot-Hq Limited | Aultbea | 2014 |
| Scot-Trawl Ltd | London | 2026 |
| Scotch Lamb Marketing Limited | Lanark | 1992 |