| Lexon Energy UK Ltd | Mining & quarrying | 2024 |
| Lexsus Shisha Ltd | Wholesale & retail | 2026 |
| Leyla DRY Cleaners Limited | Other services | 2026 |
| LGA Logistics Ltd | Transport & logistics | 2026 |
| LGC Cleaning Services Ltd | Administrative & support | 2023 |
| LGV Online Ltd | Wholesale & retail | 2019 |
| Liang Ltd | Construction | 2013 |
| Liberians Excellence Achievers and Global Stars Awards Limited | Professional & scientific | 2024 |
| Liberty Centre Property Management Ltd | Real estate | 2024 |
| Library 4 Multilinguals Ltd | Information & communication | 2019 |
| Liditech Ltd | Information & communication | 2022 |
| Life Empowerment Outreach | Other services | 2016 |
| Lifecare Services Ltd | Health & social care | 2020 |
| Lifeline Church | Other services | 2009 |
| Lifeline Community Projects | Education | 2000 |
| Lifeline Enterprises Limited | Health & social care | 2004 |
| Lifeline Network International | Other services | 2009 |
| Lifestyle Essentials Ltd | Wholesale & retail | 2023 |
| Liftpro Services Ltd | Construction | 2023 |
| Light Print London Ltd | Manufacturing | 2025 |
| Liibra FF Ltd | Hospitality | 2025 |
| Like Motors Ltd | Wholesale & retail | 2026 |
| LIL Dumplin Kitchen Ltd | Hospitality | 2022 |
| Lili VY Ltd | Transport & logistics | 2018 |
| Lilyima Company Limited | Health & social care | 2025 |
| Lime Fair Limited | Information & communication | 2025 |
| Limeclicks Ltd | Information & communication | 2022 |
| Limenight Ltd | Real estate | 2024 |
| LIN Clean Care Ltd | Health & social care | 2018 |
| Linarh's Gourmet Kitchen Ltd | Hospitality | 2026 |
| Linasuk Ltd | Construction | 2023 |
| Lincoln Salomon Limited | Health & social care | 2020 |
| Linda Nails Ltd | Other services | 2019 |
| Line UP Brickwork Ltd | Construction | 2021 |
| Linen on Demand Ltd | Other services | 2021 |
| Lini Electrical Ltd | Other services | 2021 |
| Link Software Solutions Ltd | Information & communication | 2023 |
| Linked Events CIC | Education | 2023 |
| Linorf Property Services Ltd | Construction | 2026 |
| Linorf Ventures Ltd | Health & social care | 2009 |
| Lion Foods Distribution Limited | Wholesale & retail | 2025 |
| Liquid Express London Ltd | Wholesale & retail | 2025 |
| Liquid Express Ltd | Wholesale & retail | 2016 |
| Lironttle Company Limited | Wholesale & retail | 2020 |
| Lirps Ltd | Construction | 2021 |
| Lisabi Consulting and Management Services Ltd | Construction | 2024 |
| LIT4EVA ENT Ltd. | Professional & scientific | 2021 |
| Lita Contractors Ltd | Construction | 2012 |
| Litco Group Ltd | Manufacturing | 2022 |
| Little & Large Pest Control Ltd | Agriculture & fishing | 2016 |
| Little Beacons Nursery Ltd | Education | 2024 |
| Little FLO GAS Ltd | Construction | 2024 |
| Little Hive Bloomers-Becontree Ltd | Health & social care | 2025 |
| Little Nook (Dagenham) Ltd | Health & social care | 2024 |
| Littleboyy Ltd | Transport & logistics | 2025 |
| Littlepearls Ltd | Education | 2026 |
| Live Healthily Ltd | Health & social care | 2022 |
| Live Orchid Ltd | Households | 2024 |
| Livewood Limited | Construction | 2017 |
| Living Fountain Ministries International | Other services | 2005 |
| Living Homelife Properties Ltd | Real estate | 2014 |
| Living Hope Christian Fellowship (Lhcf) | Other services | 2014 |
| Living Spring Associates Limited | Construction | 2014 |
| LJ Imports Ltd | Wholesale & retail | 2023 |
| LJ Light Consultancy Ltd | Professional & scientific | 2025 |
| Lkmd Limited | Construction | 2016 |
| LKV Solutions Ltd | Professional & scientific | 2015 |
| LKW Trans Logistics Limited | Transport & logistics | 2018 |
| LL Trackboard Ltd | Construction | 2025 |
| LLM Courier Limited | Transport & logistics | 2026 |
| LM Fire Protection Ltd | Construction | 2021 |
| LM Foods Trading Limited | Hospitality | 2019 |
| LMA Ltd | Construction | 2018 |
| LME Logistics Ltd | Transport & logistics | 2026 |
| Lmgd Ltd | Other services | 2018 |
| Lmroadisa Limited | Health & social care | 2023 |
| LMS Top Ltd | Construction | 2026 |
| LMT Civil Engineering Ltd | Construction | 2026 |
| Lndrs Plus Ltd | Wholesale & retail | 2019 |
| LNK Enterprises PVT Ltd | Real estate | 2022 |
| LO Wholesale Ltd | Wholesale & retail | 2023 |
| Load and Go Logistics Ltd | Professional & scientific | 2026 |
| Local Staff Plus Limited | Administrative & support | 1996 |
| Locoac Ltd | Health & social care | 2020 |
| Lodge Convenience Ltd | Wholesale & retail | 2014 |
| Lodge OFF Licence Limited | Wholesale & retail | 2025 |
| Logibiz Technologies Limited | Information & communication | 2021 |
| Logic Consultants Ltd | Information & communication | 2023 |
| Logic Sphere Technologies Ltd | Information & communication | 2024 |
| Logiglobe Limited | Transport & logistics | 2021 |
| Logistics & CAB Rental Limited | Administrative & support | 2020 |
| Logistics Worker Ltd | Construction | 2016 |
| Logo Moto Limited | Transport & logistics | 2019 |
| Lojawa Holdings Ltd | Construction | 2024 |
| Lojay Limited | Health & social care | 2019 |
| Lolalayo Business Services Limited | Hospitality | 2022 |
| Lomaj Limited | Transport & logistics | 2025 |
| Londo Trading Limited | Construction | 2022 |
| London Academy for the Empowerment of Women Limited | Education | 2024 |
| London Apartments and Houses Limited | Extraterritorial | 2014 |