| Linxon PVT Ltd | Professional & scientific | 2017 |
| Linxon UK Ltd | Professional & scientific | 2018 |
| Liongrass Limited | Professional & scientific | 2018 |
| Lionrockers Ltd | Real estate | 2023 |
| Lionshare Investments Ltd | Real estate | 2021 |
| Liora Security Solutions Limited | Information & communication | 2025 |
| LIP Building Services Ltd | Construction | 2024 |
| Lisa Ghaith Limited | Arts & recreation | 2009 |
| Lisa Mann Integrative Therapy Limited | Health & social care | 2026 |
| Lisa York Therapy Limited | Health & social care | 2024 |
| Listcrown Limited | Construction | 1985 |
| Lisus Double Glazing Limited | Construction | 2022 |
| Little Fish Basket Limited | Hospitality | 2022 |
| Little Lanterns Education Ltd | Health & social care | 2025 |
| Little Loads Ltd | Water & waste | 2022 |
| Little London Lady Ltd | Wholesale & retail | 2020 |
| Little Ocean Basket Limited | Hospitality | 2019 |
| Little Planet Photos Limited | Professional & scientific | 2017 |
| Little Red Envelope Ltd | Professional & scientific | 2018 |
| Little Shock Ltd | Professional & scientific | 2016 |
| Little Sprogs & Co Limited | Wholesale & retail | 2023 |
| Live Love Local Connections Limited | Administrative & support | 2017 |
| Live Travel and Tours Ltd | Administrative & support | 2008 |
| Livin Space London Ltd | Construction | 2014 |
| Livina Properties Ltd | Construction | 2023 |
| Living Angel Limited | Administrative & support | 2022 |
| Li’L Angels Day Nursery and PRE School Limited | Health & social care | 2020 |
| Ljfood Limited | Health & social care | 2022 |
| LJM Consulting Limited | Professional & scientific | 2017 |
| LL Angels Limited | Health & social care | 2026 |
| Llar Limited | Real estate | 2021 |
| Lloyd-Roberts Investments LLP | | 2010 |
| LM Price Consulting Limited | Professional & scientific | 2026 |
| LM Risk Consulting Limited | Professional & scientific | 2017 |
| LMM Developments Ltd | Real estate | 2022 |
| LO Co Motion Car and Van Hire Ltd | Extraterritorial | 2008 |
| LO CO2 Vehicle Rental Ltd | Extraterritorial | 2008 |
| Lo-Fi Recliner Limited | Information & communication | 2009 |
| Location London Property Limited | Real estate | 2013 |
| Lockestone Residents Management Company Limited | Households | 2002 |
| Lockside Lounge Limited | Hospitality | 2012 |
| Lodge Livery Limited | Agriculture & fishing | 2011 |
| Logi POD Ltd | Information & communication | 2018 |
| Logidex IT Ltd | Information & communication | 2017 |
| Logistics 24 Ltd | Transport & logistics | 2023 |
| Logixworks Ltd | Information & communication | 2009 |
| LON LON House | Information & communication | 2013 |
| London & Counties Property Co Limited | Real estate | 2012 |
| London & Local Window Design Ltd | Construction | 2012 |
| London & Southern Limited | Administrative & support | 2011 |
| London Accounting Services Limited | Professional & scientific | 1979 |
| London and Surrey Contractors Limited | Construction | 2014 |
| London and Surrey Developments Ltd | Real estate | 2020 |
| London and Surrey Gynaecology Service Ltd | Health & social care | 2018 |
| London Bollywood Events Ltd | Arts & recreation | 2026 |
| London Bollywood Orchestra Ltd | Arts & recreation | 2024 |
| London Bridge & City Healthcare Ltd | Health & social care | 2009 |
| London City Electrical Limited | Construction | 2012 |
| London Cricket Coaching Limited | Education | 2019 |
| London Dermatopathology LLP | | 2011 |
| London Eclipse Electrical Ltd | Construction | 2026 |
| London Education and Culture Center Ltd | Education | 2018 |
| London House Property Company Limited | Households | 2015 |
| London Leisure Holdings Limited | Professional & scientific | 1987 |
| London Leisure Services Limited | Construction | 1978 |
| London Market Group Limited | Other services | 2025 |
| London Mechanical Services Limited | Construction | 2018 |
| London Pulse Limited | Arts & recreation | 2016 |
| London Restaurants Limited | Administrative & support | 2008 |
| London Rising Ltd | Professional & scientific | 2011 |
| London Road Twickenham Ltd | Real estate | 2026 |
| London South TPS Limited | Wholesale & retail | 2007 |
| London Toughening Limited | Manufacturing | 2003 |
| Londonflooringcompany Ltd | Construction | 2012 |
| Londonwebfactory.Com Ltd | Information & communication | 2011 |
| Longfort Limited | Households | 1974 |
| Longrun Holdings Limited | Professional & scientific | 2017 |
| Longs Associates Limited | Professional & scientific | 2020 |
| Longshore Limited | Wholesale & retail | 2016 |
| Longview Economics Limited | Professional & scientific | 2003 |
| Look Good Feel Better Trading Limited | Administrative & support | 2014 |
| Loomz Ltd | Wholesale & retail | 2019 |
| Loose Women Limited | Financial services | 1998 |
| Lord Creative Limited | Administrative & support | 2025 |
| Lord's Wine Partnership | | 2008 |
| Lordell Place (Wimbledon) Management Company Limited | Households | 1993 |
| Lords Group Ltd | Real estate | 2024 |
| Lords Properties Ltd | Real estate | 2020 |
| Loredana Tailoring Ltd | Other services | 2026 |
| Lotties Larder Limited | Hospitality | 2020 |
| Lotus Abode Enterprises Ltd | Real estate | 2021 |
| Lotus Abode Ltd | Health & social care | 2017 |
| LOU Lou's Tea Room Ltd | Hospitality | 2023 |
| Loudoun Clear Audio Limited | Information & communication | 2010 |
| Louise Lambert Limited | Professional & scientific | 2015 |
| Lounge Life Designs Ltd | Professional & scientific | 2025 |
| Lovatter Ltd | Real estate | 2024 |
| Love Africa Press Ltd | Information & communication | 2026 |
| Love Your Accountants Limited | Professional & scientific | 2017 |
| Love Your Life Coaching Ltd. | Education | 2023 |