| Stourton Estates Limited | Horncastle | 2013 |
| Stovolds Hill Farms Limited | Chatham Maritime | 1936 |
| Stow Farms Limited | Lincoln | 2012 |
| Stow Hatcheries Limited | King'S Lynn | 2005 |
| Stow Park Farm Ltd | Norwich | 1985 |
| Stowell Farms Limited | Marlborough | 2022 |
| Stowell Hill Limited | Somerset | 1972 |
| Stowell Park Estate Limited | Cheltenham | 1987 |
| Stracathro Estates Limited | Kincardineshire | 1991 |
| Strachan Fishing Ltd. | Fraserburgh | 2008 |
| Stradbrook Farms Ltd | Sleaford | 2025 |
| Stradsett Ltd | Kings Lynn | 2015 |
| Straid Farms Limited | Girvan | 1963 |
| Straight Road Farm Limited | Colchester | 2022 |
| Straith Estates Limited | Dumfriesshire | 1986 |
| Stranded Experiences Ltd | Cookham | 2021 |
| Strang Farming Co Ltd | Glasgow | 2024 |
| Strang Limited | Salisbury | 1999 |
| Strangaton Game Farm Limited | Exeter | 2013 |
| Strangforestrygroundworks Ltd | Campbeltown | 2025 |
| Strata Scotland Ltd. | Kirkcaldy | 2022 |
| Strath Caulaidh Limited | By Forgandenny | 1998 |
| Strathbogie Farms Ltd | Huntly | 2015 |
| Strathbraan Limited | Dunkeld | 2013 |
| Strathbraan Woodland Consulting Ltd | Dunkeld | 2021 |
| Strathbury's Ltd | London | 2024 |
| Strathconon Forest Limited | Edinburgh, Eh3 8He | 2007 |
| Strathdon Ranch Limited | Alford | 2019 |
| Strathearn Livestock Limited | Kilkeel | 2017 |
| Strathearn Produce Ltd | Fife | 2007 |
| Strathelliot Fishing Company Limited | Peterhead | 1990 |
| Strathmore Potato Growers Limited | Kirriemuir | 2008 |
| Strathmore Potatoes Limited | Forfar | 2005 |
| Strathnairn Community Woodlands | Inverness | 2002 |
| Strathray Farms Limited | Aberdeenshire | 1953 |
| Strathtay Potato Company Limited | Angus | 1999 |
| Strathview Farm Ltd | Ballymena | 2015 |
| Stratifi Limited | Todmorden | 2015 |
| Stratton Contracting Limited | Ellon | 2007 |
| Stratton Fishing Limited | Cramlington | 2019 |
| Stratton Hall Farms Limited | Faversham | 2010 |
| Stratton Innovations Limited | Bradford | 2020 |
| Stratton on the Fosse Farming Company Ltd | Taunton | 2013 |
| Stratton-Streles Estates Limited | Kidderminster | 1940 |
| Straw Farms Limited | Magherafelt | 1997 |
| Strawberry Fields Enterprises Limited | Cambridge | 2014 |
| Strawberry Fields Farm Ltd | Fareham | 2024 |
| Strawberry Heaven Limited | Ipswich | 2013 |
| Strawbyn Kennels Ltd | London | 2025 |
| Strawpine Limited | Doncaster | 1998 |
| Strawson Limited | Newark | 2001 |
| Strawson Produce Ltd | Newark | 2019 |
| Stream Farm Operations Limited | Henley-On-Thames | 2020 |
| Streamberg Ltd | Shetland | 2016 |
| Streamflex Solutions Limited | Dollar | 2015 |
| Streaming Reels Limited | Looe | 2010 |
| Streamshow Limited | Ludlow | 1999 |
| Streamside Farms Ltd | Waterlooville | 2018 |
| Streamvale Farm Limited | Belfast | 2020 |
| Streamways Gardens Ltd | Braunton | 2014 |
| Streather Hayward Farms Limited | Buntingford, | 1958 |
| Street Croft Farm Ltd | Herriard | 2017 |
| Street Place Holdings Ltd | Fareham | 2025 |
| Streetly Hall Farm Limited | Huntingdon | 2010 |
| Stretton Spreading Limited | Rugby | 2016 |
| Strettons Spreading Services Ltd | Rugby | 2002 |
| Stric Lands Limited | Wellingborough | 2012 |
| Strickland Eggs Limited | Carlisle | 2010 |
| Strickland Hill Farming Limited | Grange-Over-Sands | 2013 |
| Strictly Daylilies Ltd | Cambridge | 2012 |
| Stride One Ltd | Wembley | 2024 |
| Striders Dog Services Ltd | Bromborough | 2018 |
| Strides Equestrian Limited | Warrington | 2016 |
| Strides Haulage Limited | Ropley | 1973 |
| Strides Horse Leasing Ltd | Bolton | 2025 |
| Stringer Bros. Limited | Oldham | 2021 |
| Stripy FIG Limited | Nr. Bridgnorth | 2015 |
| Stroan Free Range Ltd | Ballymoney | 2011 |
| Stroanbrack Farm Ltd | Strabane | 2013 |
| Stronaba Produce Ltd | Spean Bridge | 2021 |
| Strone Croft Ltd | Newtonmore | 2018 |
| Strongdri Limited | Beckenham | 1977 |
| Stronmilchan Common Grazings Limited | Dalmally | 2009 |
| Stroud Valleys Tree Care Ltd | Stroud | 2021 |
| Strout & Sons Ltd | Dorchester | 2026 |
| Strowan Farming Co Limited | Bridge Of Allan | 1996 |
| Struan Dalgleish Arboriculture Ltd | Banchory | 2019 |
| Structured Solutions Limited | Aylesbury | 2018 |
| Strule Tributaries and Rivers Trust Limited | Omagh | 2014 |
| Strumpshaw Estates Ltd | Norwich | 2022 |
| Strumpshaw Game Farm Limited | Norwich | 2010 |
| Strutt and Parker (Farms) Limited | Chelmsford | 1918 |
| Strutt Tree Care Limited | Brighton | 2019 |
| STS Agri Plant Ltd | Somerset | 2026 |
| STS Contractors UK Limited | Crewe | 2008 |
| Stuart Allen Agricultural Contracting Limited | Bakewell | 2003 |
| Stuart Calder Commercial Limited | Lichfield | 2009 |
| Stuart Davis Limited | Chelmsford | 1998 |
| Stuart Fordham Consultancy Limited | Sandy | 2016 |
| Stuart M Ranby Agricultural Limited | Doncaster | 2021 |