| L.R.Ala Limited | Pontypridd | 2018 |
| L/N Trading AS Xsupplements Ltd | Bristol | 2025 |
| LA Advanced Practice & Aesthetics Ltd | Skelmersdale | 2022 |
| LA Bella Services Limited | Stanmore | 2021 |
| LA Destination Ltd | London | 2020 |
| LA Global Services Ltd | Woodford Green | 2022 |
| LA Wind Energy Ltd | Campbeltown | 2022 |
| Labour Resource Centre Limited | London | 2023 |
| Labrinth Adviser 4 Care Leavers Ltd | London | 2021 |
| Lady Cassie Ltd | Leeds | 2021 |
| Ladypchigs Ltd | Banbury | 2025 |
| LAG TM Ltd | Doncaster | 2024 |
| Lagits CIC | Hoddesdon | 2025 |
| Lahmeds Limited | Bristol | 2026 |
| Laing Services Limited | Livingston | 2019 |
| Lakeview Houz Limited | Bilston | 2023 |
| Lakhi Optical Ltd | Dewsbury | 2025 |
| Lambert Fire Protection Ltd | Saffron Walden | 2026 |
| Lambrook Services Limited | South Petherton | 2008 |
| Lamm Services Limited | Great Bardfield | 2025 |
| Lamp Development Organisation Limited | Edinburgh | 2014 |
| Lancashire Fire Solutions Ltd | Wigan | 2012 |
| Lancashire GP Ltd | Lancaster | 2026 |
| Lancashire Home Care Ltd | Burnley | 2023 |
| Lancaster Clements Probate Services Limited | Bilston | 2020 |
| Lance Nursing Services Ltd | Bristol | 2019 |
| Land & Property Terrier Ltd | Abingdon | 2021 |
| Lane Right Ltd | Dunstable | 2024 |
| Language World UK Ltd | Manchester | 2025 |
| Lantrix Traffic Management Limited | Stirling | 2024 |
| LAO Inc Limited | Peterborough | 2018 |
| Larch Health Care Ltd | Wolverhampton | 2020 |
| LARGO6 Limited | Prestwich | 2013 |
| Larne Community Care Centre | Co Antrim | 1996 |
| Larrainzar Consulting Solutions Limited | Meadow Lane Salisbury | 2002 |
| Larus Aviation Limited | Stratford-Upon-Avon | 2013 |
| Lasting Support Services Ltd | London | 2021 |
| Lasweeney Ltd | Newcastle Upon Tyne | 2019 |
| Latimer Fire Protection Limited | Corby | 2013 |
| LAU Healthcare Limited | Nottingham | 2025 |
| Laura Jane Grace Limited | Prescot | 2025 |
| Laurea Project Services Limited | Newcastle Upon Tyne | 2014 |
| Lavingham Planning Consultants Limited | Northallerton | 2016 |
| Lavira Clinic Ltd | Moreton-In-Marsh | 2024 |
| Lavrenti Limited | Belvedere | 2024 |
| Law Fire Solutions Ltd | Maldon | 2025 |
| LAW5U H&S Limited | Manchester | 2018 |
| Lawfranc Consulting Limited | London | 2024 |
| Lawpad Limited | Wembley | 2025 |
| Lawson Care Services Ltd | Stockton-On-Tees | 2026 |
| Lawton Fire Consultancy Ltd | Moreton-In-Marsh | 2013 |
| Lawyers Without Borders UK Limited | London | 2003 |
| Laylah Counselling Limited | Leicester | 2025 |
| LB ACP Ltd | York | 2026 |
| LB Passive Fire Limited | High Wycombe | 2021 |
| LB26 Medical Services Ltd | Cleethorpes | 2023 |
| LBH Fire Systems Limited | Leigh-On-Sea | 2016 |
| LC1 Solutions Ltd | Glasgow | 2026 |
| LCT TM Ltd | Doncaster | 2025 |
| LD Fire Solutions Limited | Welling | 2018 |
| LDB Survey & Consultancy Ltd | Chilworth | 2025 |
| Ldhr | London | 2019 |
| LDM Property Services Limited | Potters Bar | 2020 |
| LDW Safety Services Ltd | Worcester | 2018 |
| LE Saux Consulting Ltd | Dalgety Bay | 2018 |
| Lead Defence Consulting Ltd | London | 2025 |
| Leader Fire Protection Ltd | Leicester | 2021 |
| Leading Ace Limited | Cannock | 2024 |
| Leadstal Limited | Wimborne | 2022 |
| Leafwood Consulting Limited | London | 2023 |
| Learn, Share, Care Ltd | Cheltenham | 2017 |
| Learnedex Limited | Tunbridge Wells | 2022 |
| Learnfield Ltd | Leicester | 2018 |
| Learning Abilities CIC | Peterlee | 2023 |
| Learning Connect Construction Ltd | Hounslow | 2022 |
| Learning Executive Network Ltd | Altrincham | 2025 |
| Learnwithavocado Ltd | London | 2025 |
| LEC Fire Safety Solutions Ltd | Chatham | 2023 |
| Leckey Social Care Consultancy Ltd | Swadlincote | 2025 |
| LEE PEI YUN Limited | Liverpool | 2024 |
| LEE Wills and Estate Planning Ltd | Whitstable | 2024 |
| Leek Care Group Ltd | Leek | 2026 |
| Leemar Care Services Ltd | Cheltenham | 2026 |
| Leep Fire Solutions Ltd | Preston | 2024 |
| Leeson-Steele Consulting Ltd | Bedworth | 2026 |
| Leeway Care Kingston Ltd | New Malden | 2024 |
| Leeworks Ltd | London | 2026 |
| Leficia Healthcare Services Ltd | Milton Keynes | 2026 |
| Legacy 365 Ltd | Coventry | 2024 |
| Legal Defence UK Ltd | London | 2024 |
| Legal Entity Ltd | Sheffield | 2025 |
| Legal Pathways Project CIC | Rushden | 2025 |
| Legal Remedy Centre C.I.C. | London | 2019 |
| Legal World Services UK Limited | Leigh On Sea | 2018 |
| Legitimate Healthcare Services Ltd | London | 2026 |
| Leisureplan Limited | Chorley | 2002 |
| Lemon Tree Project CIC | Harlow | 2024 |
| Lemons Into Lemonade Ltd | Derby | 2019 |
| Lennon's Virtual Hub Ltd | Lichfield | 2021 |
| Leogims Limited | Leicester | 2018 |