| LEE Healey Racing Ltd | Arts & recreation | 2024 |
| Leemick Limited | Construction | 2000 |
| Left Barn Ltd | Arts & recreation | 2024 |
| Legends Property Ltd | Construction | 2025 |
| Legum Limited | Professional & scientific | 2023 |
| Leisurestates Limited | Real estate | 2021 |
| Lennox Farm Ltd | Other services | 2024 |
| Leon Star Ltd | Construction | 2017 |
| Leppenwell Doyle Holdings Ltd | Real estate | 2020 |
| Let's Go Green Cabs Limited | Transport & logistics | 2008 |
| Leven IS Strijd Ltd | Real estate | 2020 |
| Lexcraft Solutions Limited | Professional & scientific | 2015 |
| Leymoor Limited | Professional & scientific | 2021 |
| LHS+ Limited | Health & social care | 2023 |
| LIA Beauty Clinic Ltd | Other services | 2025 |
| LIA Estate Ltd | Real estate | 2025 |
| Lifestyle Vending Solutions Ltd | Wholesale & retail | 2025 |
| Liftcrown 2002 Limited | Construction | 1986 |
| Lifting Training Limited | Construction | 2022 |
| Liftingworx Limited | Administrative & support | 2022 |
| Lightwater Properties Limited | Real estate | 2006 |
| Lime Groves (Sittingbourne) Ltd | Financial services | 2018 |
| Linden Healthcare Ltd | Health & social care | 2023 |
| Lingo Technology UK Limited | Wholesale & retail | 2022 |
| Linton Jackson Ltd | Wholesale & retail | 2017 |
| Linton Seafoods Limited | Wholesale & retail | 2007 |
| Lion Court (Sittingbourne) Management Company Limited | Households | 2025 |
| Lippett Auto Repairs Ltd. | Administrative & support | 2021 |
| Lisa's Cleaning Services Ltd | Administrative & support | 2023 |
| Liso Health Care Private Limited | Health & social care | 2023 |
| Listed Property Owners Club Services Ltd | Financial services | 2015 |
| LIT Biohazard & Trauma Cleaning Limited | Administrative & support | 2026 |
| Little Acorns Childcare 2020 Ltd | Education | 2020 |
| Little Barn Associates Limited | Real estate | 2014 |
| Little Big Shacks Ltd | Real estate | 2017 |
| Little Treasures Kindergarten Limited | Education | 2012 |
| Live Comms Ltd | Information & communication | 2020 |
| Live Defiant Limited | Professional & scientific | 2026 |
| Live Rail Games Ltd | Information & communication | 2025 |
| Living Edge Consulting Limited | Professional & scientific | 2008 |
| Lizycare Services Limited | Education | 2025 |
| Lizzybessy Ltd | Professional & scientific | 2013 |
| LJB Brickwork Ltd | Construction | 2019 |
| Ljrbuild Limited | Construction | 2025 |
| LK Power Ltd | Construction | 2014 |
| LK Therapy Ltd | Public administration | 2025 |
| LK Wellness Ltd | Health & social care | 2023 |
| LKM Recycling Limited | Extraterritorial | 2013 |
| Lloyd Lundie Building Contractors Limited | Construction | 2007 |
| Lloyd's Multi Solutions Limited | Administrative & support | 2018 |
| Llse Community Interest Company | Professional & scientific | 2017 |
| LM Media Group Limited | Professional & scientific | 2019 |
| LM Residence Limited | Real estate | 2023 |
| LMR Group Holdings Ltd | Financial services | 2024 |
| LNB Electrical Solutions Limited | Construction | 2023 |
| Lo-Tech Systems Limited | Wholesale & retail | 2008 |
| Lobtrans Ltd | Wholesale & retail | 2025 |
| Local Waste Enforcement Ltd | Professional & scientific | 2023 |
| Localis Research Limited | Professional & scientific | 2001 |
| Locldn Ltd | Wholesale & retail | 2021 |
| Loczek Trans Ltd | Transport & logistics | 2024 |
| Logik Group Limited | Financial services | 2022 |
| Logik Logistics International Limited | Transport & logistics | 2012 |
| Logunbay Consulting Ltd | Information & communication | 2017 |
| Loisivy Ltd | Hospitality | 2014 |
| Lola 2011 Limited | Administrative & support | 2024 |
| London & Kent Metals Limited | Water & waste | 1988 |
| London Handyman Services Ltd | Transport & logistics | 2015 |
| Long Street Cerne Limited | Construction | 2014 |
| Lonsit Limited | Health & social care | 2016 |
| Lord SC Consultants Limited | Construction | 2017 |
| Lordwill Limited | Professional & scientific | 2015 |
| Lotinga Industrial Doors Limited | Manufacturing | 2001 |
| Lovelidge Properties LLP | | 2022 |
| Lovelock Properties Ltd | Real estate | 2022 |
| Lovemondays Consulting Limited | Administrative & support | 2014 |
| LOW Construction Ltd | Construction | 2017 |
| LOW Cost Car and Commercial Ltd | Wholesale & retail | 2026 |
| LOW Estates Limited | Construction | 2017 |
| Lower Halstow Sailing Limited | Arts & recreation | 1988 |
| LPC Solutions Limited | Water & waste | 2013 |
| LPO Fencing Ltd | Other services | 2025 |
| LR Carpentry & Joinery Ltd | Manufacturing | 2020 |
| LS Art Ltd. | Wholesale & retail | 2015 |
| LSE Lettings Limited | Real estate | 2022 |
| LT Re-Pointing and Brickwork Services Ltd | Construction | 2026 |
| LTB Utilities Limited | Energy | 2026 |
| LTR Supplies Limited | Wholesale & retail | 2002 |
| Lubostavrev Ltd | Wholesale & retail | 2024 |
| LUC LUC Trans Ltd | Transport & logistics | 2019 |
| LUC Metals Sell Ltd | Wholesale & retail | 2025 |
| LUC Trans HGV Ltd | Transport & logistics | 2025 |
| Luca Properties Ltd | Real estate | 2022 |
| Lucid Builds Ltd | Construction | 2020 |
| Lucy Mountain Limited | Information & communication | 2018 |
| Luke Blanshard Project Management Ltd | Professional & scientific | 2017 |
| Luke Goldsmith Limited | Extraterritorial | 2011 |
| Luklaw Pharma Ltd | Health & social care | 2023 |
| Lupus Rail Services Ltd | Professional & scientific | 2018 |
| LUR Healthcare Ltd | Health & social care | 2025 |