| S.T. & A.L. Ward Ltd | Exeter | 2006 |
| S.T.A.L.L.S (Cheshire) Limited | Crewe | 2026 |
| S.T.A.L.L.S. Limited | Larkhill | 2023 |
| S.W Agriculture Ltd | Derby | 2024 |
| S.W. Brown & Sons (Farming) Limited | Yeovil | 1979 |
| S.W. Elliott Limited | Southwell | 2016 |
| S.W. Parker Limited | Wainfleet St Mary, Skegness, | 1976 |
| S.W.Cross and Sons Limited | Bury St Edmunds | 1947 |
| S.W.Highwood(Pluckley)Limited | Pluckley | 1952 |
| S.W.Hull & SON (Farms) Limited | Fareham | 1962 |
| S.W.Mount & Sons Limited | Canterbury | 1958 |
| S4 Energy Limited | Bridlington | 2012 |
| S@@F Ltd | Lowestoft | 2020 |
| SA & EJ Kirk and SON Limited | Taunton | 2007 |
| SA & LJ Harris Limited | Yeovil | 2013 |
| SA Deireadh Oysters Ltd | Newry | 2023 |
| SA Horses Limited | Southam | 2023 |
| SA Shetland Ltd | Cunningsburgh | 2018 |
| SA Tree Surgery Ltd | Telford | 2026 |
| SA1 Management Ltd | Swansea | 2023 |
| SAB Equine Limited | Gravesend | 2024 |
| Sabrecrest Ltd | London | 1997 |
| Sabsky Limited | Mexborough | 2025 |
| Sacar Leys Limited | Hitchin | 2008 |
| Sacha Hamilton Equestrian Limited | Reading | 2019 |
| Sackville Forge Ltd | Bedford | 2021 |
| Sadborow Farms Limited | Milton Keynes | 2003 |
| Saddlecombe Stud Limited | Oxted | 2016 |
| Saddles Riding Centre Ltd | Bexley | 2017 |
| Saddleworth Poultry Ltd | Oldham | 2024 |
| Sadeh | Orpington | 2016 |
| SAE Seaweed Ltd | Swanage | 2022 |
| Saeth & Co Ltd | Powys | 2026 |
| Saf-X Trading Limited | Cambridge | 2025 |
| Safe AS Houses NW Limited | Neston | 2005 |
| Safe Equestrian - Learning With Horses Ltd | Scunthorpe | 2023 |
| Safe Forestry Limited | Inverness | 2019 |
| Safe Pest Prevention and Bird Control Ltd | Mexborough | 2013 |
| Safe Tree Limited | Brighton | 2018 |
| Safe Tuition Limited | Scunthorpe | 2023 |
| Safer Woodworking Limited | Tewkesbury | 2024 |
| Saferock Aquaculture Ltd | Basildon | 2024 |
| Safford Farms Limited | Carlisle | 2019 |
| Saffron (Eco) Ltd | Derby | 2021 |
| Saffron Hydrofarms Limited | Saffron Walden | 2019 |
| Sage & Greens CIC | Exeter | 2026 |
| Sage Agricultural Services Limited | Whitchurch | 2019 |
| Sage Enviro Ltd | Dover | 2014 |
| Sagescape Ltd | Dover | 2018 |
| Sagittarius Fishing Company Limited | Buckie | 2016 |
| Sahara Farms Ltd | London | 2023 |
| Sahl Regen UK Limited | St. Albans | 2025 |
| Saicada Fishing Limited | Peterhead | 2019 |
| Saint Agnes Rods, Lines and Tubes Ltd | Tonbridge | 2026 |
| Saint Fiacre Limited | Oxford | 2021 |
| Saintoft Sanctuary Limited | Pickering | 2025 |
| Saints Huberts Group Limited | Stanley | 2026 |
| Saints Way Wines Ltd | Fowey | 2024 |
| Sais Global Group Ltd | Croydon | 2020 |
| Sajpro Production Ltd | Lu1 5At | 2023 |
| Saker Contracting Ltd | Braintree | 2018 |
| Sakura ARB Training Ltd | Wickford | 2025 |
| Salad Fresh Limited | Waltham Cross | 2024 |
| Salad Ville UK Ltd | Milton Keynes | 2024 |
| Salads Harvesting Services Limited | Ely | 2015 |
| Salamanca Tree Services Ltd | Edinburgh | 2022 |
| Salamelica Limited | Bishop'S Stortford | 2015 |
| Salar Solutions Limited | Tunbridge Wells | 2005 |
| Salary Brook Vineyard Limited | Colchester | 2022 |
| Salcey Limited | Northampton | 2017 |
| Salcombe Fish and Shellfish Limited | Salcombe | 2005 |
| Salden Farm Limited | Thame | 1995 |
| Sale & SON Limited | Portsmouth | 2003 |
| Salen Pier Limited | Kinross | 2012 |
| Salers Cattle Society of the UK Limited | Milnthorpe | 1985 |
| Sales Sparki Ltd | Mildenhall | 2025 |
| Salford Angling Club Ltd | Manchester | 2019 |
| Salford Forestry Ltd | Worsley | 2013 |
| Salgen Ltd | London | 2022 |
| Salim Global Investment Ltd | London | 2025 |
| Salisbury Cereals Limited | Salisbury | 1970 |
| Salix River & Wetland Services Limited | Cheshire | 2003 |
| Salle Farms Company | Norwich | 1973 |
| Sallipets Rescue Inc Pet-A-Pet Limited | Godstone | 2022 |
| Sally Sleightholme Ltd | York | 2008 |
| Sallyridge Produce Ltd | Armagh | 2007 |
| Salmo Fishings Ltd | Dundee | 2024 |
| Salmon Gibston Farms Limited | | 1978 |
| Salmon Interactions Association Limited | Edinburgh | 2026 |
| Salmon's Farms Ltd | Ludlow | 2022 |
| Salome Investments Limited | Stockton On Tees | 2002 |
| Salperton Park Estate Limited | High Wycombe | 1995 |
| Salston Farms Limited | Ottery St. Mary | 2017 |
| Salt Farming Ltd | Barnstaple | 2025 |
| Salt PIT Croft Farm Ltd | Ormskirk | 2014 |
| Salt Wood Ltd | Ilfracombe | 2016 |
| Saltcarr Farms Limited | Norwich | 2008 |
| Saltdean Vegetables Ltd | Brighton | 2023 |
| Saltfleetby Fisheries Limited | Grimsby | 2002 |
| Salthaugh Grange Farm Limited | Hull | 2005 |