| Summerfields Holsteins Limited | Newcastle-Under-Lyme | 2018 |
| Summerfields Nurseries (Catton) Limited | Rugeley | 2007 |
| Summerhill (Caerwys) Limited | Chester | 2018 |
| Summerhill Farm Ltd | | 2007 |
| Summerleaze Limited | Berkshire | 1983 |
| Summers Holdings Limited | Solihull | 1997 |
| Summers Shellfish Ltd | Fraserburgh | 2013 |
| Summers TGS Ltd | Nottingham | 2026 |
| Summerskye Texels Ltd | Ferryhill | 2025 |
| Summerstorm Bloodstock (Scotland) Limited | Hamilton | 2021 |
| Summerstorm Bloodstock Ltd | London | 2021 |
| Summerton Fishing Ltd. | Buckie | 2017 |
| Summit Tree Service Ltd | Gilford | 2025 |
| Summit Trees Limited | Witney | 2020 |
| Sumners Ponds Limited | Worthing | 2004 |
| Sumnut Farms Limited | Tonbridge | 1961 |
| Sun 1 Food UK Ltd | Brentford | 2018 |
| Sun Agricultural Services Limited | Brackley | 2011 |
| Sun Forge Limited | Welshpool | 2003 |
| Sun Hing Agriculture Limited | Bristol | 2024 |
| Sun Meadow CD Ltd | Cornwall | 2025 |
| Sun of the Woods Ltd | Northampton | 2026 |
| Sun Salads Limited | Bosham | 1984 |
| Sunart Fields Limited | Whaley Bridge | 2020 |
| Sunart Sea Farm Limited | Argyll | 2000 |
| Sunbeam Aquaculture Limited | Argyll | 2003 |
| Sunbeam Watercress Limited | Romsey | 1962 |
| Suncrop Burstwick Generation Limited | Essex | 2024 |
| Suncrop Generation Limited | Harlow | 2023 |
| Suncrop Growers Limited | Harlow | 2017 |
| Suncrop New Generation Limited | Essex | 2024 |
| Sundara Farm Ltd | Dartford | 2025 |
| Sunderlandwick Farms Limited | Driffield East Yorkshire | 1964 |
| Sundey Hill Summer Schools Limited | Chippenham | 1999 |
| Sundial Properties Limited | Forfar | 1979 |
| Sundown Wood & Stone Ltd | Stoke-On-Trent | 2026 |
| Sunequip Limited | Stanley | 1998 |
| Sunflower Garden Cash and Carry Ltd | Leeds | 2019 |
| Sunflower Group Limited | Ely | 2011 |
| Sunflower Park Ltd | Gainsborough | 2024 |
| Sung Beansprouts Limited | Belfast | 2011 |
| Sunhill Stud Limited | Stow On The Wold | 2018 |
| Sunley Farms Limited | Canterbury | 1983 |
| Sunley Stud Limited | Godmersham Near Canterbury | 1984 |
| Sunlions Enterprises Ltd | Carluke | 2021 |
| Sunnucks Farms Limited | Colchester | 2012 |
| Sunny Bank Kitchen Garden Ltd | Sedbergh | 2024 |
| Sunny Orchards Limited | Pevensey | 2017 |
| Sunny Organics Ltd | Worthing | 2025 |
| Sunny Plant Nursery Ltd | Milton Keynes | 2016 |
| Sunny Side Eggs Limited | Biggar | 2023 |
| Sunny Sky Farm Limited | Bristol | 2025 |
| Sunny View Kennels and Cattery Limited | Hebden Bridge | 2022 |
| Sunnybank Farm & Holdings Ltd | Newport | 2022 |
| Sunnybank Farm Agricultural Ltd | Chepstow | 2020 |
| Sunnybank Fishing Limited | Fortrose | 2003 |
| Sunnydale Alpacas Limited | Doncaster | 2005 |
| Sunnyfields Apiaries Limited | Bungay | 2021 |
| Sunnyhill Dairy Limited | Marlborough | 2013 |
| Sunnyhill View Stables Ltd | Lenham | 2020 |
| Sunnyhurst Nurseries (Holdings) Limited | Preston | 2010 |
| Sunnyhurst Nurseries Limited | Preston | 1946 |
| Sunnymead Ltd | Ilkley | 2018 |
| Sunnyside Community Gardens | London | 2002 |
| Sunnyside Dairy Farms Limited | West Leake | 1948 |
| Sunnyside Farm Caravan Park & Fishery Ltd | Shrewsbury | 2012 |
| Sunnyside Farm Limited | Tarporley | 2017 |
| Sunnyside Farm Projects Ltd | Rosyth | 2024 |
| Sunnyside Fisheries Limited | Wells | 2018 |
| Sunnyside Forestry Limited | Ellon | 2021 |
| Sunnyside Forestry Services Limited | Doncaster | 2014 |
| Sunnyside Ltd | London | 2017 |
| Sunnyside Nurseries Limited | Craigavon | 2018 |
| Sunnyside Orchard Ltd | Wisbech | 2025 |
| Sunnyside Rare Breeds Limited | Milton Keynes | 2013 |
| Sunnyvale Gardens Fisheries Limited | Halifax | 2016 |
| Sunnyview Equine Ltd | Leek | 2015 |
| Sunray Farm Liveries Ltd | Guildford | 2026 |
| Sunrise East Limited | Newark | 2004 |
| Sunrise Farming Ltd | Stockbridge | 2024 |
| Sunrise Poultry Farms Limited | Loughborough | 1973 |
| Sunrise Success (JA) Ltd | Croydon | 2024 |
| Sunset (Eco) Ltd | Derby | 2021 |
| Sunshine and Green Limited | Sudbury | 2017 |
| Sunshine Farm Feeds Ltd | Blackburn | 2014 |
| Sunshine Farm Holdings Ltd | Poulton-Le-Fylde | 2024 |
| Sunshine Organic Farms Ltd | London | 2012 |
| Sunstead Ltd | Leeds | 2023 |
| Sunwillow Transport Ltd | Tarporley | 2025 |
| Supacrop Limited | Knutsford | 2021 |
| Supacrops Arable Limited | Banbury | 2020 |
| Supanova (Holdings) Limited | Weymouth | 2014 |
| Super Hooves Ltd | Nottingham | 2020 |
| Superdon Limited | Fraserburgh | 2000 |
| Superfinace Ltd | Luton | 2025 |
| Superfood Farming Ltd | Coleford | 2024 |
| Supertune Limited | Shrewsbury | 2006 |
| Supherb Produce Limited | Stourbridge | 2011 |
| Supply BIO Logistics Ltd | Boston | 2026 |
| Supreme Farms Ltd | Bradford | 2023 |