| LBM64 Limited | Professional & scientific | 2013 |
| LBM64 Surrey Limited | Administrative & support | 2016 |
| LBS Property Ltd | Real estate | 2022 |
| LE Gassick Ltd | Professional & scientific | 2026 |
| LE Quelenec Consulting Services Ltd | Professional & scientific | 2025 |
| Lead Hound Ltd | Professional & scientific | 2021 |
| Learning Function Limited | Professional & scientific | 2014 |
| Leaway Estates Limited | Administrative & support | 2021 |
| Lebentz Consulting Ltd | Other services | 2015 |
| LEE & Laver Properties Limited | Real estate | 2018 |
| LEE Street Management Company Limited | Households | 2001 |
| Leejay Property Co. Limited | Real estate | 1962 |
| Leggacy Software Limited | Information & communication | 2015 |
| Legit Creative Limited | Information & communication | 2024 |
| Leith Hill Trail Runners Limited | Arts & recreation | 2024 |
| Leith Mergers & Acquisitions Limited | Professional & scientific | 2012 |
| Leith Vale Consulting Limited | Professional & scientific | 2020 |
| Leith View (Dorking) Management Company Limited | Households | 1984 |
| Leithfield Park (Godalming) Management Company Limited | Households | 2014 |
| Lemfield Limited | Hospitality | 2018 |
| Lemon Grove Management Company Limited | Households | 2020 |
| Leollie Limited | Real estate | 2020 |
| Leonardo DA Vinci Ltd | Information & communication | 2024 |
| Lespere Limited | Real estate | 2014 |
| Lets in the Sun Limited | Real estate | 2009 |
| Levylsdene Court Residents Association Limited | Households | 1970 |
| Lewra Ltd | Professional & scientific | 2022 |
| Lexington Court Residents Company Limited | Households | 2003 |
| LIB International Ltd | Professional & scientific | 2014 |
| LID2 Limited | Professional & scientific | 2025 |
| Lifeextension Ltd | Other services | 2022 |
| Lifestyle Partnership Ltd | Construction | 2002 |
| Light AS a Feather Ltd | Professional & scientific | 2023 |
| Lightweave Limited | Information & communication | 2026 |
| Liliana Puccini Rojas Limited | Professional & scientific | 2019 |
| Lily and Leitrim Antiques Limited | Wholesale & retail | 2021 |
| Lilypad IT Solutions Limited | Hospitality | 2009 |
| Limes (Anglesea Road) Residents Association Limited(The) | Real estate | 1986 |
| Limetail Limited | Information & communication | 2010 |
| Limeway Pharma Design Limited | Professional & scientific | 2015 |
| Lincoln Arms Ltd | Hospitality | 2011 |
| Lindfield Gardens Residents Company Limited | Households | 2005 |
| Linnet Close Management Company Limited | Real estate | 2020 |
| Lionmaple Ltd | Information & communication | 1997 |
| Liquid Ninja Limited | Wholesale & retail | 2017 |
| Liquid OPM Consulting Ltd | Administrative & support | 2013 |
| Listed & New Build Ltd | Construction | 2000 |
| Litchfield Gardens Residents Company Limited | Households | 2002 |
| Litmus Trading Ltd | Administrative & support | 2025 |
| Litmus Wines Limited | Administrative & support | 2008 |
| Little Brave Ltd | Information & communication | 2019 |
| Little Folk Nursery Rhymes Limited | Arts & recreation | 2018 |
| Little Rose Limited | Administrative & support | 2008 |
| Little White Cottages Limited | Real estate | 2021 |
| LJ People Holdings Limited | Financial services | 2020 |
| LJ People Ltd | Professional & scientific | 2020 |
| LJ Rivett Ltd | Real estate | 2021 |
| LJB Digital Ltd | Professional & scientific | 2022 |
| Lklm Ltd | Professional & scientific | 2020 |
| Lklmc Ltd | Professional & scientific | 2024 |
| LKW Family Mediation Limited | Professional & scientific | 2026 |
| LM Artists Ltd | Other services | 2024 |
| LNC Media Ltd | Professional & scientific | 2020 |
| Load in Limited | Transport & logistics | 2015 |
| Loban Field Limited | Professional & scientific | 2008 |
| Lodgecrest Developments Limited | Construction | 2018 |
| Lodgecrest Holdings PLC | Construction | 2018 |
| Lodgecrest Investments Limited | Real estate | 2018 |
| Logmore Farm Estate Limited | Real estate | 2001 |
| Lomah Ltd | Real estate | 2022 |
| London City Music Ltd | Arts & recreation | 2015 |
| London Road Residents Company Limited | Households | 2003 |
| London Youth Action Ltd | Administrative & support | 2009 |
| Longfield Grove Management Company Limited | Households | 2006 |
| Longyard Management Limited | Households | 1981 |
| Lonsdale Place Limited | Real estate | 2012 |
| Lonsdale Road Dorking Limited | Households | 2012 |
| Lorca Properties Limited | Real estate | 2002 |
| Lorne Alexander Interior Design Limited | Professional & scientific | 2020 |
| Lost Universe Limited | Wholesale & retail | 2020 |
| Louhelenart Ltd | Arts & recreation | 2023 |
| Louise Fitcoach Ltd | Professional & scientific | 2022 |
| Loukiya Limited | Wholesale & retail | 2017 |
| Love This Life Events Limited | Arts & recreation | 2018 |
| Love This Life Ltd | Arts & recreation | 2017 |
| Love Transcending Ltd | Education | 2026 |
| Love Your Logo Limited | Extraterritorial | 2017 |
| Lovelocks Management Limited | Households | 1987 |
| Lower Deepdene Park Road Residents Association Limited | Other services | 2009 |
| Lpmbuild Ltd | Construction | 2025 |
| Lrra Limited | Households | 2009 |
| LSJ Digital Ltd | Professional & scientific | 2023 |
| Lucan Fashion Limited | Wholesale & retail | 2017 |
| Lucis College Limited | Education | 2005 |
| Lucky Fountain Limited | Hospitality | 2017 |
| Lumora PR Ltd | Professional & scientific | 2026 |
| Luna's Imaginarium Ltd | Wholesale & retail | 2025 |
| Lunainteriorservices Ltd | Real estate | 2023 |
| Lupine Canine Limited | Other services | 2017 |
| Luxurehome Ltd | Extraterritorial | 2021 |