| Livin Management Ltd | Professional & scientific | 2024 |
| Living Landscapes and Design Limited | Administrative & support | 2018 |
| Living Sofa Ltd | Wholesale & retail | 2026 |
| Living Source Limited | Hospitality | 2008 |
| Living Space Media Ltd | Information & communication | 2026 |
| Living Well Support Ltd | Health & social care | 2026 |
| Livingston Group Limited | Professional & scientific | 2003 |
| Livingstone Ventures Ltd | Real estate | 2024 |
| Livingworks Limited | Education | 2023 |
| Livoro Ltd | Real estate | 2024 |
| Livwise Management Ltd | Information & communication | 2026 |
| Liwa Capital Management Ltd | Professional & scientific | 2008 |
| Lixmere Properties Limited | Real estate | 2004 |
| Lixus Rail Ltd | Construction | 2018 |
| LIZ Dorfman Limited | Financial services | 2010 |
| Lizadez Ltd | Professional & scientific | 2017 |
| Lizmony Limited | Administrative & support | 2021 |
| LJ Foodworld Limited | Wholesale & retail | 2024 |
| LJC Group Ltd | Construction | 2022 |
| LJD Engineering Limited | Professional & scientific | 2016 |
| LJL Raskoti Property Investment Ltd | Real estate | 2025 |
| LJL Raskoti Property Services Ltd | Real estate | 2025 |
| LJS Aesthetics Limited | Health & social care | 2026 |
| LK Bespoke Interiors Ltd | Professional & scientific | 2021 |
| LK Deco Solutions Ltd | Construction | 2022 |
| LK Property London Limited | Real estate | 2020 |
| LK Shanghai Limited | Information & communication | 2021 |
| LK Two Properties Limited | Real estate | 2024 |
| Lkrn Services Ltd | Information & communication | 2024 |
| LKS Recruitment Services Ltd | Administrative & support | 2024 |
| Lkst Limited | Professional & scientific | 2017 |
| LL Strategy Ltd | Professional & scientific | 2023 |
| Llanover Land Limited | Real estate | 2024 |
| LLANOVER37-43 Limited | Households | 2014 |
| Llechwen Hall Hotel Limited | Hospitality | 2000 |
| LLL Mayfair Limited | Financial services | 2018 |
| Llook Commerce Studio Ltd | Professional & scientific | 2026 |
| Lloyd MAY Limited | Administrative & support | 2014 |
| Lloyds Risk Services Limited | Professional & scientific | 2019 |
| LLSK8 Limited | Health & social care | 2022 |
| LM & Crys Pipe Systems Limited | Manufacturing | 2021 |
| LM Corporate Holdings Limited | Financial services | 2022 |
| LM Emporium Ltd | Wholesale & retail | 2024 |
| LMA Property Holdings Limited | Real estate | 2022 |
| LMC Law Limited | Professional & scientific | 2014 |
| LMC Legal Ltd | Professional & scientific | 2018 |
| LML Property Ltd | Real estate | 2024 |
| Lmnop Ltd | Information & communication | 2023 |
| Lmpd Properties Ltd | Real estate | 2021 |
| Lmre Limited | Administrative & support | 2019 |
| LMS Ventures Ltd | Real estate | 2021 |
| LMT Chamber Ensemble Limited | Arts & recreation | 2000 |
| LNG Studio Limited | Professional & scientific | 2023 |
| LNJ Property Group Limited | Real estate | 2026 |
| LNT Restored Ltd | Health & social care | 2018 |
| Loadstone Consulting Ltd | Professional & scientific | 2024 |
| Local Community Housing CIC | Real estate | 2025 |
| Local Fame Limited | Professional & scientific | 2014 |
| Local on the Hill Ltd | Wholesale & retail | 2024 |
| Local Plumbing & Heating Supplies Ltd | Construction | 2018 |
| Local Property Maintenance Limited | Construction | 2024 |
| Local Restaurant Limited | Hospitality | 2014 |
| Local Value Shop Limited | Wholesale & retail | 2025 |
| Location Exchange Ltd | Real estate | 2021 |
| Lock X Locksmiths.London Ltd | Manufacturing | 2024 |
| Lockdown Properties Limited | Real estate | 2025 |
| Lockfast Harrow 24/7 Limited | Construction | 2011 |
| Lockfast London 24/7 Limited | Construction | 2009 |
| Lockmaster 247 Ltd | Construction | 2022 |
| Locksmith Tony Ltd | Manufacturing | 2023 |
| Locksy 24/7 Locksmith Ltd | Construction | 2026 |
| Locum Ortho Therapist Ltd | Health & social care | 2025 |
| Locumeyes Ltd | Health & social care | 2015 |
| Locumloop Ltd | Health & social care | 2020 |
| Locusalpha Limited | Information & communication | 2009 |
| Lodge Lane Care Home Limited | Health & social care | 2021 |
| Lodge Lane Land Limited | Real estate | 2022 |
| Lodi Films Ltd | Information & communication | 2022 |
| Log-It Ltd | Information & communication | 2014 |
| Logar DRY Fruit Ltd | Hospitality | 2024 |
| Logfield Limited | Administrative & support | 2011 |
| Loggi Limited | Information & communication | 2024 |
| Logic Colony Limited | Information & communication | 2006 |
| Logic Habitat Limited | Real estate | 2013 |
| Logicacloud IT Solutions Limited | Information & communication | 2018 |
| Logicare Complete Solutions Limited | Administrative & support | 2007 |
| Logicloop UK Ltd | Information & communication | 2022 |
| Logico Services Ltd | Real estate | 2003 |
| Logictax Limited | Professional & scientific | 2026 |
| Logicwind Limited | Information & communication | 2023 |
| Login Construction Services Ltd | Construction | 2017 |
| Login Developments Ltd | Construction | 2022 |
| Login Properties Ltd | Real estate | 2022 |
| Logiq Solutions Ltd | Information & communication | 2019 |
| Logisupply Solutions Ltd | Information & communication | 2025 |
| Logix Entertainment Ltd | Arts & recreation | 2016 |
| Logix Lobby Ltd | Information & communication | 2024 |
| Lohana Charitable Foundation Ltd | Health & social care | 2015 |
| Lois Gastoneaux Homes Limited | Construction | 2017 |
| Lokdhuncafe UK Limited | Arts & recreation | 2024 |