| UP the Yard Limited | Northampton | 2024 |
| UPC Solutions Limited | Bourne End | 2007 |
| Upcott Cross Farm Ltd | Launceston | 2025 |
| Upcott Farm (Devon) Ltd | Cardiff | 2020 |
| Upcott Farm Limited | Crediton | 2003 |
| Upcycling Engineering Ltd | London | 2025 |
| Uphall Grange Limited | Esher | 1953 |
| Uphay Farm Limited | Guildford | 2016 |
| Uphill Farming Ltd | Ashford | 2021 |
| Uphill Licensed Boatmen and Registered Fishermans Association Limited | Weston-Super-Mare | 2023 |
| Uphouse Farm Limited | Norwich | 1997 |
| UPL Animal Health Holdings Limited | Warrington | 2022 |
| UPL Crop Protection Investments UK Limited | Warrington | 2022 |
| UPL Health and Nutrition Science Holding Limited | Warrington | 2022 |
| UPL Investments UK Limited | Warrington | 2022 |
| Upland Environmental Ltd | Peak District | 2024 |
| Upland Forestry Ltd | Spean Bridge | 2020 |
| Upland Grazing Ltd | Barnard Castle | 2025 |
| Uplands Farm Barn Limited | Dover | 2026 |
| Uplands Farms Limited | Kettering | 1981 |
| Uplands Projects Limited | Preston | 2017 |
| Upper Ballaird Farm Coop Ltd | Glasgow | 2022 |
| Upper Barr | Wigtownshire | 2013 |
| Upper Billesley Estates Ltd. | Stratford On Avon | 1996 |
| Upper Brandon Farm Limited | Leeds | 2021 |
| Upper College Farm Ltd | Lewes | 2022 |
| Upper Coln Farm and Stud Limited | Cirencester | 1993 |
| Upper COT Estate Limited | Penzance | 2020 |
| Upper Dysart Limited | Montrose | 2017 |
| Upper Glenfintaig Estate Farm Limited | Perth | 2012 |
| Upper Great Farm Limited | London | 2024 |
| Upper Hattons Ltd | Telford | 2026 |
| Upper Hawkhillock Farm Ltd | Coventry | 2006 |
| Upper House Farm Limited | Hereford | 2004 |
| Upper Medway Farms Ltd. | Maidstone | 1997 |
| Upper Nuttalls Farm Limited | Wigan | 2018 |
| Upper Onny Farmers CIC | Shrewsbury | 2025 |
| Upper Oykel Fishings Limited | Beauly | 2010 |
| Upper Park Cattery Limited | Ross-On-Wye | 2024 |
| Upper Southwood Limited | Halesowen | 2022 |
| Upper Welson Farm Limited | Leominster | 1997 |
| Upper Wensum Environmental Cluster Group CIC | Kings Lynn | 2021 |
| Upper Wick Boarding Kennels Limited | Dursley | 2000 |
| Upper Woodhead Farms Limited | Barnsley | 2019 |
| Upper WYE Farmers Group C.I.C. | Llandrindod Wells | 2026 |
| Upper WYE Valley Nature Partnership Ltd | Bath | 2024 |
| Uppermill Farms Limited | Kintore | 1981 |
| Upperton Vineyards Limited | Worthing | 2016 |
| Uppertown Tools Limited | Buxton | 1999 |
| Upphall Farming Ltd | London | 2026 |
| Uprising Properties Limited | Torquay | 2009 |
| Upshire Business Park Ltd. | Upshire | 1990 |
| Upstream Aquatics Ltd | Maidenhead | 2023 |
| Upton Equine Services Ltd | Bolney | 2024 |
| Upton Farm Enterprises Ltd | Basingstoke | 2018 |
| Upton House Stud Limited | London | 2024 |
| Upton Mill Farm Limited | Towcester | 1985 |
| Upton PIG Producers Ltd | Driffield | 2017 |
| Upton Smokery Limited | Burford | 2005 |
| Upton Specialised Tree Services Ltd | Wimborne | 2010 |
| Ur-Sltn Ltd | Tonbridge | 2011 |
| UR8AN Soul CIC | Nottingham | 2024 |
| Urbalreagh Limited | Strabane | 2024 |
| Urban Apiarist 1 Limited | Bury St. Edmunds | 2021 |
| Urban Arborist Ltd | Doncaster | 2017 |
| Urban Cactus Co Ltd | Halesowen | 2026 |
| Urban Chondros Ltd | York | 2023 |
| Urban Constrictors Ltd | York | 2017 |
| Urban Country Stores Limited | Challock | 2022 |
| Urban Eden London Ltd | London | 2009 |
| Urban Equestrian Racing C.I.C. | Leicester | 2025 |
| Urban Farm-Group Ltd | Canterbury | 2025 |
| Urban Farm-It Limited | Canterbury | 2025 |
| Urban Farm-Produce Limited | Canterbury | 2025 |
| Urban Farmer Ltd | Canterbury | 2019 |
| Urban Food Adventure Ltd | Grayshott | 2023 |
| Urban Forest Arboriculture Limited | Hampton | 2021 |
| Urban Frog Tackle Ltd | London | 2021 |
| Urban Grow Liverpool CIC | Liverpool | 2022 |
| Urban Kitchen Gardens Ltd | London | 2021 |
| Urban Logs Limited | London | 2022 |
| Urban Mushrooms London Ltd | London | 2021 |
| Urban Myco Ltd | Oswestry | 2025 |
| Urban Myth Angling Limited | Norwich | 2013 |
| Urban Nature Tree Surgery Limited | Chichester | 2014 |
| Urban Planter Ltd | Harrow | 2025 |
| Urban Property Care Ltd | Southampton | 2024 |
| Urban Trailblazer Community Interest Company | Southall | 2021 |
| Urban Vegetables Ltd | London | 2018 |
| Urban Vineyard Ltd | London | 2025 |
| Urban Woodcutters Ltd | Billingshurst | 2020 |
| Urbandogstreex Ltd | London | 2025 |
| Urchinomics Impact Limited | Northampton | 2023 |
| URE Forestry Ltd | Yaxley | 2025 |
| Urpeth Farms Limited | Stanley | 1960 |
| Urras NAN Craobh Uibhist a Tuath | Isle Of North Uist | 2006 |
| URY Estate Limited | Edinburgh | 2011 |
| Usan Fisheries Limited | Angus | 2003 |
| Usan Potatoes Limited | Montrose | 2018 |
| Usan Salmon Fisheries Limited | Angus | 2003 |