| Seskinore Dairy Farmers' Buying Group Ltd | Omagh | 2013 |
| Seskinore Poultry Farm Ltd | Omagh | 2020 |
| Sesvanderhave UK Limited | Lincoln | 2012 |
| SET (Marina) Limited | Brixham | 2012 |
| SET in Stone (N.I.) Ltd | Scarva | 2015 |
| Seth Bradbury Tree Services Ltd | Cradley Heath | 2014 |
| Setter Farm Ltd | Scalloway | 2026 |
| Settie Farm Limited | Stirling | 1968 |
| Settle Anglers Association Ltd | Settle | 2018 |
| Seven Acre Farm Limited | Rainham | 2017 |
| Seven Acres Plant Nursery Ltd | Llanwrda | 2022 |
| Seven Barrows Limited | Lambourn | 2008 |
| Seven Carishader Ltd | Isle Of Lewis | 2025 |
| Seven Hills Stud Ltd | Sheffield | 2023 |
| Seven Jack Russells Limited | London | 2019 |
| Seven Lands Farm Ltd | Aylesbury | 2015 |
| Seven Leaf Holdings Ltd | Preston | 2019 |
| Seven Mile Livery Limited | Seaton Burn | 2011 |
| Seven Palms for Agricultural Reclamation Ltd | Leicester | 2025 |
| Seven Penny Meadows Farm Ltd | Medomsley | 2022 |
| Seven River Equestrian Ltd | Lincoln | 2022 |
| Seven Rivers Limited | London | 2019 |
| Seven Seas Exports S.L Ltd | Rochdale | 2021 |
| Seven Springs Trout Hatchery Limited | County Tyrone | 1977 |
| Seven Stars Livery Limited | Wigan | 2004 |
| Sevenacres Livestock Limited | Shipley | 2014 |
| Sevenoaks Fencing Ltd | Sevenoaks | 2016 |
| Seventeen Acres Ltd | Dundee | 2025 |
| Severals Farm Limited | Doncaster | 1978 |
| Severells Fields Community Interest Company | Cirencester | 2025 |
| Severn Game Ltd | Bridgnorth | 2026 |
| Severn Gorge Countryside Trust | Telford | 1991 |
| Severn Plus Enterprises Ltd | York | 2018 |
| Severn Rivers Trust | Worcester | 2008 |
| Severn Valley Donkey and Dog Rescue | Bridgnorth, | 2010 |
| Severn Valley Farmers Ltd | Shrewsbury | 2004 |
| Severnside Milkers Ltd | Welshpool | 2019 |
| Sevrax Limited | Skegness | 2026 |
| Sewallis Limited | Swindon | 2012 |
| Sewaluna Albion CIC | Corwen | 2025 |
| Seward Engineering Limited | Biggleswade | 1999 |
| Sewell Hewitt (Farms) Limited | Woodbridge | 1961 |
| Sewing and Doggy Limited | London | 2021 |
| Sexton Dogs Ltd | Houghton Le Spring | 2023 |
| Sexton Farm Ltd | Bungay | 2023 |
| Sexy Beef Ltd | Wisbech | 2025 |
| Seyel Ltd | Kenilworth | 2011 |
| Seymour Joy Limited | Cambridge | 1991 |
| Seymour Smith and Sons Limited | Tanworth In Arden | 1973 |
| Seymour Stevens Limited | Kent | 1960 |
| Seyoki Limited | Petersfield | 2011 |
| SF Equine Limited | Dorking | 2015 |
| SFA Ventures Ltd | Cardiff | 2018 |
| SFK Holdings Ltd | Monmouth | 2026 |
| SFP Services (Shetland) Ltd | Whalsay | 2011 |
| SFS Rural Ltd | Filey | 2019 |
| SG Brimacombe & Sons Limited | Taunton | 2004 |
| SG Country Contractors Ltd | Stevenage | 2024 |
| SG Elite Ltd | Armagh | 2017 |
| SG Farms Limited | Whitland | 2009 |
| SG Heriot Limited | Edinburgh | 2024 |
| SG Paraplanning Ltd | Deeside | 2013 |
| SG1 K9 Services Limited | Stevenage | 2022 |
| SGA Enterprises Ltd | Knutsford | 2019 |
| Sgeir Mhor (Salmon) Limited | Portree | 1989 |
| SGF Contracting Ltd | Leicester | 2022 |
| SGL Forestry Limited | Haslemere | 2008 |
| SGM Fishing Ltd | Fraserburgh | 2026 |
| Sgorran Ltd | Stirling | 2025 |
| SGR Farming Ltd | Haywards Heath | 2020 |
| SGS (Fishing) Limited | Grampian | 2002 |
| SGT Farming Limited | Jedburgh | 2026 |
| Sgurr Services Ltd | Isle Of Skye | 2011 |
| SH 90 Limited | Castle Street | 2006 |
| SH Contracting Ltd | Stourport On Severn | 2009 |
| SH Seafoods Limited | Sunderland | 2017 |
| Sh-Syndicate Ltd | Wallasey | 2020 |
| Shaaban Robert Heritage Ltd | London | 2014 |
| Shabbir's Grand Sons Ltd | Ilford | 2023 |
| Shackleton & Sons Contracting and Hire Services Ltd | Haverfordwest | 2020 |
| Shacon Enterprises Ltd | Dumfries | 2026 |
| Shade Oak Stud Bloodstock Limited | Ellesmere | 2004 |
| Shades of Green (North West) Limited | Warrington | 2010 |
| Shadowmaine Maine Coons Ltd | Nuneaton | 2025 |
| Shadowtree Forestry Limited | Chadwell Heath | 2025 |
| Shadwell Growers Limited | Craven Arms | 2013 |
| Shady Lady Farms Limited | Yarmouth | 1998 |
| Shafa Investments Limited | Hatton | 2019 |
| Shafford Fields Livery Stud Ltd | Brigg | 2020 |
| Shaftesbury Equestrian Centre Ltd | Dartford | 2025 |
| Shaftesbury Estate of Lough Neagh Limited-The | Ballyclare | 1964 |
| Shah Abbas Restaurant Ltd | London | 2018 |
| Shahid Halal Poultry Ltd | Derby | 2013 |
| Shakable Limited | Craigavon | 2019 |
| Shakerley Farm Services Ltd | Lostwithiel | 2014 |
| Shakespeare Farms Limited | Warwick | 1961 |
| Shakespeare Fisheries CIC | Manchester | 2025 |
| Shalbourne Community Growers Community Interest Company | Marlborough | 2021 |
| Shalimar Fishing Company Ltd. | Peterhead | 1999 |
| Shallow Grange Limited | Buxton | 2004 |