| Last Resort Holdings Limited | Real estate | 2021 |
| Latitude 50 Topsham Management Co Limited | Households | 2023 |
| Latitude HR Limited | Professional & scientific | 2022 |
| Launceston Star Ltd | Hospitality | 2025 |
| Launch 76 UK Bidco Limited | Financial services | 2025 |
| Launch Online Limited | Professional & scientific | 2012 |
| Laundry Lounge (Plymouth) Ltd | Hospitality | 2023 |
| Laura Todd Advisory Ltd | Professional & scientific | 2026 |
| Lauren Aston Designs Limited | Manufacturing | 2018 |
| Lauren Productions Limited | Information & communication | 1985 |
| Lauren Summers Ltd | Health & social care | 2024 |
| Laurence Property Limited | Real estate | 2017 |
| Lavanda Topsham Ltd | Other services | 2021 |
| Laverty Consultancy Limited | Health & social care | 2022 |
| Lawn Hill Management Company Limited | Administrative & support | 1990 |
| Lawnet Limited | Other services | 1990 |
| Laybrook Investments Limited | Real estate | 1990 |
| Layd Fragrance Ltd | Manufacturing | 2026 |
| Layer 101 Limited | Manufacturing | 2025 |
| Layerd Ltd | Information & communication | 2025 |
| Layton Property Limited | Real estate | 2017 |
| LB Equine Ltd | Agriculture & fishing | 2014 |
| LBH Group Ltd | Financial services | 2020 |
| Lbjb Limited | Financial services | 2018 |
| LCD Publishing Holdings Limited | Financial services | 2017 |
| LCD Publishing Limited | Other services | 1984 |
| LCG Associates Limited | Construction | 2023 |
| LCG Developments Limited | Construction | 2025 |
| LCH South West Limited | Financial services | 2025 |
| LCI Property Management Bournemouth Ltd | Households | 2019 |
| Lcjb Land Ltd | Financial services | 2025 |
| Lcjb Ltd | Financial services | 2025 |
| Lcjb Projects Ltd | Financial services | 2025 |
| Lcki Ltd | Manufacturing | 2025 |
| LCN Properties Limited | Real estate | 1999 |
| LCO Management Limited | Real estate | 2019 |
| LCS Healthcare Consultancy Limited | Professional & scientific | 2017 |
| LD Network Ltd | Health & social care | 2016 |
| LDR Homes Ltd | Real estate | 2019 |
| LDT Recordings Ltd | Information & communication | 2023 |
| LE Bistro@Ghf Ltd | Hospitality | 2018 |
| LE Jardin DE Fleur Ltd | Agriculture & fishing | 2023 |
| LE Management Ltd | Administrative & support | 2025 |
| LE Maux’S Ltd | Construction | 2021 |
| LE Navet Bete Limited | Arts & recreation | 2013 |
| Leadbetter Industries Ltd | Wholesale & retail | 2017 |
| Leadership Unleashed Limited | Administrative & support | 2002 |
| Leading Communities Ltd | Professional & scientific | 2013 |
| Leading Great Lives Foundation Limited | Education | 2025 |
| Leamans Letting Agents Limited | Real estate | 2010 |
| Lean Estates Limited | Construction | 2021 |
| Lean Projects Limited | Construction | 2021 |
| Lean Workspace Solutions Ltd | Construction | 2026 |
| Leander Blades Investment Club Limited | Other services | 2025 |
| Leander Developments Limited | Construction | 1990 |
| Lear, Browne & Dunsford Limited | Wholesale & retail | 1973 |
| LEARNING@1A Ltd | Education | 2026 |
| Leaseteam Limited | Other services | 1994 |
| Leaver Consultancy Limited | Other services | 2015 |
| Leavewell Limited | Other services | 2022 |
| LED Enterprises Limited | Hospitality | 2008 |
| LED Industrial Lighting Company Limited | Wholesale & retail | 2009 |
| Ledger Twelve Partners Ltd | Professional & scientific | 2026 |
| LEE Developments (UK) Limited | Hospitality | 1996 |
| LEE Marks Roofing Ltd | Construction | 2021 |
| LEE Parmenter Contractors Limited | Construction | 2005 |
| LEE White Flooring (Exeter) Limited | Construction | 2011 |
| LEE Wylie Consultancy Ltd | Professional & scientific | 2022 |
| Leebres Renovations Ltd | Real estate | 2024 |
| Leese's Recycling Limited | Water & waste | 2014 |
| Lefebvre Ltd | Hospitality | 2019 |
| Left Coast Projects Limited | Professional & scientific | 2025 |
| Legacy Ascend Trading Ltd | Financial services | 2026 |
| Legacy Property Assets Limited | Professional & scientific | 2022 |
| Legendare Ltd | Administrative & support | 2021 |
| Legends Exeter Ltd | Other services | 2018 |
| Legends Lounge Pool Ltd | Hospitality | 2026 |
| Leggworks Limited | Wholesale & retail | 1983 |
| Legz Workwear Limited | Wholesale & retail | 2025 |
| Lehm Ltd | Construction | 2023 |
| LEI Bloom Properties Limited | Real estate | 2025 |
| Leighon Restoration Limited | Real estate | 2021 |
| Leisuretech Services Ltd | Manufacturing | 2015 |
| Lejhun Ltd | Wholesale & retail | 2025 |
| Lemaco Ltd | Wholesale & retail | 2025 |
| Lemond Carbon UK Limited | Manufacturing | 2021 |
| Lendon Limited | Financial services | 2023 |
| LEO Property Group Limited | Real estate | 2021 |
| Leon Taylor Limited | Other services | 2008 |
| Leonard Gold Financial Management Limited | Financial services | 2019 |
| Leonard Square Management Company Ltd | Households | 2022 |
| Lerymat Ltd | Hospitality | 2023 |
| Let's Attend Ltd | Extraterritorial | 2012 |
| Let's Go WOK About Limited | Extraterritorial | 2009 |
| Letmojo Limited | Administrative & support | 2020 |
| Letrubydoit Ltd | Professional & scientific | 2021 |
| Letstrack UK Ltd | Information & communication | 2019 |
| Letsync Ltd | Construction | 2025 |
| Level UP Scaffolding Limited | Construction | 2021 |
| Levelsphere Residents Management Limited | Real estate | 1986 |