| Langham House Farm(Alford)Limited | Lincs | 1961 |
| Langland Developments (Fitzalan) Ltd | London | 2013 |
| Langlands Farrier Services Limited | Melrose | 2004 |
| Langlands Tree Services Limited | Shaftesbury | 2005 |
| Langley Abbey Estates Limited | Norwich | 1989 |
| Langley Arboriculture Ltd | Chandler'S Ford | 2018 |
| Langley Dairies Limited | Saxmundham | 2018 |
| Langley Horticulture Limited | Hove | 2015 |
| Langley Priory Farm Limited | Derbyshire | 1996 |
| Langley Ridge Ltd | Shipton U Wychwood | 2024 |
| Langley Utility Services Limited | Chandler'S Ford | 2020 |
| Langleys Farm Ltd | Ormskirk | 2024 |
| Langmead Farming Limited | Bosham | 2017 |
| Langmead Farms (Devon) Limited | Crediton | 2004 |
| Langmead Farms Limited | Chichester | 2025 |
| Langmead Herbs Limited | Chichester | 1999 |
| Langmeads of Flansham Limited | Chichester | 1956 |
| Langold Allotments Limited | Worksop | 2022 |
| Langold Estates Limited | Barton Upon Humber | 1953 |
| Langridge Organic Farm Limited | Devon | 2007 |
| Langside Farms Limited | Leven | 1996 |
| Langside Kennels Ltd | Melrose | 2016 |
| Langthorns Plantery Limited | Dunmow | 2018 |
| Langton Farms Limited | Malton | 1978 |
| Langton Tree Specialists Limited | Cupar | 2006 |
| Langtons Farm CYF | Caerphilly | 2019 |
| Lanjeth Nursery and Water Gardens Ltd | St Austell | 2022 |
| Lankford & Sons (Fishing) Limited | Hampshire | 1978 |
| Lankon Limited | Tatsfield | 2020 |
| Lanlivery Farm Limited | Bodmin | 2010 |
| Lanmead Limited | Shifnal | 1983 |
| Lanner Equestrian Centre Ltd | Camborne | 2010 |
| Lannister Farm Limited | Belfast | 2019 |
| Lanoforte Limited | York | 2007 |
| Lanpro Limited | Lancaster | 2001 |
| Lansdale Nurseries Limited | Southport | 1988 |
| Lansdowne Nursery Limited | Barnet | 1976 |
| Lansdowne Nursery Plants Limited | Worthing | 2013 |
| Lantons Ltd | Taunton | 2018 |
| Lantrac UK Ltd | Poling | 2017 |
| Lanyard Arboriculture Limited | Settle | 2025 |
| Lapfordwood Limited | Exeter | 1996 |
| Lappie Farms (Gateside) Limited | Dunfermline | 1957 |
| Lapwing Farms Limited | Doncaster | 2021 |
| Lapwings & Farms Ltd | Stonehaven | 2026 |
| Laranjeira Ltd | Waltham Cross | 2026 |
| Larch Bridge Limited | Inverness | 2001 |
| Larch Cottage Nurseries Limited | Penrith | 2000 |
| Larch Foundry Limited | London | 2018 |
| Larch Holdings Ltd | Telford | 2020 |
| Larchwing Limited | Pontypridd | 1987 |
| Larchwood Farm Ltd | Braintree | 2022 |
| Larcombe Woodland Ltd | Totnes | 2021 |
| Larden Growers Limited | Much Wenlock | 2003 |
| Larg Farming Company Limited | Newton Stewart | 2003 |
| Large Blue Limited | Borehamwood | 2025 |
| Largie Power Ltd | Edinburgh | 2013 |
| Lark Farming Limited | Beaworthy | 2017 |
| Lark House Limited | Northallerton | 2019 |
| Larkbeare Holdings Limited | Sturminster Newton | 1965 |
| Larkfield Agriculture Limited | Petworth | 2014 |
| Larkhall Community Growers | Larkhall | 2010 |
| Larkham Farm Limited | Dorchester | 2004 |
| Larkham Topiary Gardening Limited | Ruislip Manor | 2006 |
| Larkhill Farm Ltd | Wantage | 2015 |
| Larkrise Farm Enterprises Limited | Kirton Lindsey | 2012 |
| Larks Rest Farm Limited | Huddersfield | 2008 |
| Larksfield Farming Ltd | Leominster | 2023 |
| Larne Dog Walking Limited | Larne | 2022 |
| Larne Farms Limited | Belfast | 2018 |
| Larne Lough Nurseries Ltd | Larne | 2015 |
| Laroccafc Ltd | Denny | 2021 |
| Larpent Bloodstock Limited | Newmarket | 2023 |
| Lartington Lakes Ltd | Barnard Castle | 2025 |
| Larways Limited | Southampton | 1998 |
| Laryngoair MED Limited | Manchester | 2024 |
| LAS Lilas Limited | Sherborne | 2020 |
| Lasch Limited | Woking | 2017 |
| Lasgach Snacraig Ltd | Fraserburgh | 2018 |
| Laslett Farms Limited | Hythe | 2014 |
| Last Agriculture Ltd | Felixstowe | 2026 |
| Last Ditch Limited | York | 2019 |
| Last Hope Outreach Ltd | Frome | 2025 |
| Last Viking Wales Ltd | Darlington | 2019 |
| Latc Group UK Limited | Guildford | 2021 |
| Latchets Development Limited | Bristol | 2012 |
| Late Night Animal Welfare JS Ltd | Birmingham | 2025 |
| Latham Agriculture Ltd | Bury | 2021 |
| Latham Farming Limited | Tarporley | 2015 |
| Latham Farms Limited | Nottinghamshire | 1959 |
| Lathom Enterprises Limited | Ormskirk | 1996 |
| Lathom Horticulture Limited | Lymm | 2020 |
| Latters Toll Farm Ltd | Tonbridge | 2001 |
| Latton Alpacas Limited | Amersham | 2007 |
| Laughtons of Louth Limited | Louth | 2007 |
| Launceston Farm Limited | Taunton | 2009 |
| Laund Farm Ltd | Manchester | 2018 |
| Launder Farm Experience Days Ltd | Newtown | 2018 |
| Laura Brennan Equestrian Centre Ltd | Halifax | 2014 |
| Laura D Fishing Limited | Torquay | 2013 |