| Letham Farming Limited | Berwickshire | 2004 |
| Letham Woods Limited | Glasgow | 1998 |
| Letheringsett Farms Limited | Norwich | 2003 |
| Letor Limited | Londonderry | 2012 |
| Letrosco Ltd | Axbridge | 2024 |
| Lets Manage South Limited | Bristol | 2020 |
| Letting Grow Ltd | London | 2019 |
| Letton Farms Ltd. | Norfolk | 1989 |
| Letton Road Nurseries Limited | Thetford | 2001 |
| Letts Farming Limited | Bristol | 2026 |
| Letzers Seafood Limited | London | 2015 |
| Letzers Shellfish Ltd | Kyle | 2019 |
| Level PAR Bloodstock Limited | Edgware | 2012 |
| Levelz Kennelz Ltd | Middlewich | 2022 |
| Levemun Operations Ltd | Chadwell Heath | 2020 |
| Levens Farms Limited | Cumbria | 1986 |
| Leventhorpe Farm Ltd | Wetherby | 2026 |
| Leverett Contracting Limited | Holywell | 2003 |
| Leverett Farming Limited | Llandeilo | 2015 |
| Leverhulme Farms Ltd | London | 2023 |
| Levernbank Kennels Ltd | Glasgow | 2023 |
| Levers Estates Limited | Shaftesbury | 1997 |
| Leverton Brothers Limited | Bourne | 2016 |
| Leverton Farms Limited | Spalding | 1963 |
| Leviathan Supplies Ltd | Barry | 2020 |
| Levitt's (Farmers) Limited | North Newbald | 1949 |
| Lewies Farm Ltd | Spalding | 2026 |
| Lewilbraham Ltd | London | 2025 |
| Lewis Agricultural Limited | Newtown | 2023 |
| Lewis and Harris Scallops Ltd | Isle Of Lewis | 2020 |
| Lewis Brothers Contracting Limited | Carmarthen | 2022 |
| Lewis Enterprises Ltd | Irvine | 2021 |
| Lewis Farm Holdings UK Ltd | Carmarthen | 2018 |
| Lewis Farms Ltd | Barnstaple | 2013 |
| Lewis J. Riley Limited | Huddersfield | 1975 |
| Lewis Mills Contracting Limited | Brandesburton | 2021 |
| Lewis Pearson Ltd | Haverfordwest | 2008 |
| Lewis Robertshaw (Upwood) Limited | Bradford | 1957 |
| Lewis Shannen Ltd. | Forfar | 1996 |
| Lewis Tree Surgery Ltd | Cambridge | 2016 |
| Lewis Tree Surgery York Ltd | York | 2020 |
| Lewis Williams (Farming) Limited | North Walsham | 1977 |
| Lewis' GAS & HOP Supplies Limited | Worcester | 2019 |
| Lewisagriculture Limited | London | 2025 |
| Lewisia Limited | Blandford | 1995 |
| Lexsam Consultancies Ltd | Macclesfield | 2020 |
| Lexsam Limited | Macclesfield | 2017 |
| Leya Farm Limited | Birmingham | 2025 |
| Leydens Farm Limited | Edenbridge | 2014 |
| Leye Enterprises Limited | Fraserburgh | 2016 |
| Leyfield Farm Limited | Leeds | 2024 |
| Leyfields Limited | Newark | 2004 |
| Leymoor Farm Ltd | Huddersfield | 2026 |
| Leys Farm Limited | Morpeth | 1968 |
| Leys Farm Livery Limited | Stratford-Upon-Avon | 2020 |
| LF Tree Care Ltd | Waterlooville | 2025 |
| LFI Silva Investments Limited | Perth | 2017 |
| LFP Vegetables Limited | Spalding | 2015 |
| LG Equestrian Ltd | Liverpool | 2022 |
| LG Farriery Ltd | Spalding | 2023 |
| LG Forestry Ltd | Bwcle | 2023 |
| LG Holdings (PD) Limited | | 1998 |
| LG Marine Services Limited | Derry | 2016 |
| LGM Tree Services Ltd | Dunoon | 2023 |
| LGS Stables 10 Ltd | Tonbridge | 2025 |
| LH Agro (UK) Limited | St. Ives | 1987 |
| LH Crop Specialist Ltd | Alfreton | 2026 |
| LH Hold Co Ltd | Bourne | 2021 |
| LH Jones & Co Limited | Newport | 2015 |
| LH Limassol Enterprises Limited | Handsworth | 2021 |
| LH Offshore Limited | Beaumaris | 2026 |
| LH Spinney Ltd | Gillingham | 2020 |
| LHL Limited | Ceres | 2016 |
| LHR Limited | Colne | 2020 |
| Liam Bradley Farm Limited | Omagh | 2013 |
| Liams Foals Ltd | Cwmbran | 2025 |
| Lianne Fishing Company Ltd | Whalsay | 2011 |
| Libby's Livery Ltd | Rochester | 2022 |
| Libby's Livery Yard Ltd | Rochester | 2024 |
| Libbys Patch Ltd | Macclesfield | 2021 |
| Liberty (Eco) Ltd | Derby | 2021 |
| Liberty Demolition Ltd | Braintree | 2016 |
| Liberty Genesis Ltd | Redditch | 2019 |
| Liberty Hill CIC | Enniskillen | 2022 |
| Liberty Initiatives CIC | Poole | 2026 |
| Liberty Orchards Limited | Sherborne | 2010 |
| Liberty Rose Acres Ltd | Westerham | 2025 |
| Liberty Stone Racing Ltd | Stroud | 2025 |
| Libra Farms Ltd | Dungannon | 2017 |
| Lichen Caithness Ltd | Halkirk | 2021 |
| Lichfield Treeworks Limited | Lichfield | 2013 |
| Liddell Enterprises Limited | Andover | 1973 |
| Liddell Farms Limited | Romsey | 2016 |
| Liddlesdale Wildlife Ltd | Glasgow | 2025 |
| Lidsey Farm Limited | West Sussex | 2006 |
| Liepins Club House Ltd | Barnsley | 2025 |
| Lier Chemical Co., Ltd. | Stafford, | 2023 |
| Life at Hill Farm Limited | Bedford | 2014 |
| Life at NO.27 C.I.C. | Swansea | 2018 |
| Life Hydroponic Assets Limited | Bough Beech | 2022 |