| L.C.K. Properties Ltd | Real estate | 2016 |
| L.C.L. International Limited | Transport & logistics | 1980 |
| L.D.S. Properties Limited | Real estate | 2002 |
| L.E. Prestigious Flooring Company Limited | Administrative & support | 2022 |
| L.I.T. International Forwarding Limited | Transport & logistics | 2007 |
| L.O.P. Investments Limited | Professional & scientific | 2004 |
| L.P.D. Plastering Limited | Construction | 2004 |
| L.S Infinity Limited | Construction | 2018 |
| L.S.V Brand Ltd | Administrative & support | 2024 |
| L2 Commercial Ltd | Real estate | 2025 |
| LA Bonnita Clinic Ltd | Other services | 2025 |
| LA Carparts Ltd | Administrative & support | 2016 |
| LA Nonna Food Group Limited | Hospitality | 2018 |
| LAB Care Consultancy Ltd | Health & social care | 2018 |
| Label Viii Ltd | Information & communication | 2018 |
| Laburnum Court (Silvanglen) Residents Association Limited | Households | 1991 |
| Lacaj Construction Ltd | Construction | 2022 |
| Lacan Haulage Ltd | Transport & logistics | 2022 |
| Lacin Property Limited | Real estate | 2018 |
| Lacuna Child Ltd | Wholesale & retail | 2022 |
| Ladbrook Meadow (Hintlesham) Management Company Limited | Households | 2022 |
| Lads Need Dads CIC | Education | 2015 |
| Ladsu Ltd | Construction | 2021 |
| Lady Nelson Gardens Management Company Limited | Households | 2022 |
| Ladybirds Pre-School Ltd. | Education | 2011 |
| Laindon Heights Management Company Limited | Households | 1988 |
| Lairgate Limited | Real estate | 2025 |
| Lait Storage & Distribution Limited | Transport & logistics | 1980 |
| Lakeflare Limited | Professional & scientific | 1988 |
| Lakelands Accountants Limited | Professional & scientific | 2016 |
| Laker Brothers Limited | Professional & scientific | 2025 |
| Lakes & Coast Escapes Ltd | Real estate | 2026 |
| Lakes Industrial Park Management Company Limited | Real estate | 1999 |
| Lakes Osteopathy Limited | Health & social care | 2014 |
| Lakschandra Limited | Health & social care | 2012 |
| Lakshya Estates Limited | Real estate | 2021 |
| Laksnara Limited | Wholesale & retail | 2026 |
| Lalitha Ltd | Real estate | 2014 |
| Lalitman Limited | Real estate | 2025 |
| LAM Case Management Ltd | Health & social care | 2022 |
| LAM Lighting Ltd | Manufacturing | 2022 |
| Lamas Building Services Limited | Construction | 2021 |
| Lambent Care Services Ltd | Administrative & support | 2026 |
| Lambent Global Limited | Mining & quarrying | 2023 |
| Lambert and Prior Limited | Professional & scientific | 2019 |
| Lambo Composites Ltd | Manufacturing | 2022 |
| Lambro Refrigeration Ltd | Energy | 2002 |
| Lamodel Consults Ltd | Professional & scientific | 2026 |
| Lamodel Homes Ltd | Real estate | 2026 |
| Lamont HR Limited | Administrative & support | 2015 |
| Lanara Limited | Wholesale & retail | 2024 |
| Lancaster Court (Freehold) Limited | Households | 2018 |
| Lancaster Talent Solutions Limited | Administrative & support | 2024 |
| Lancaster`S Delicatessen Limited | Hospitality | 2008 |
| Land and Sea Chef Ltd | Hospitality | 2021 |
| Land More Leads Ltd | Information & communication | 2024 |
| Land Resolutions Ltd | Construction | 2019 |
| Landair Consulting Limited | Professional & scientific | 2017 |
| Landermere Ltd | Professional & scientific | 1995 |
| Landfast (Anglia) Limited | Administrative & support | 2004 |
| Landfast Limited | Construction | 1985 |
| Landguard Marine Ltd | Administrative & support | 2018 |
| Landman Economics Ltd | Professional & scientific | 2010 |
| Landscapes by Design Limited | Administrative & support | 2020 |
| Landseer Court Management Limited | Households | 1974 |
| Laneton Development Ltd | Professional & scientific | 2024 |
| Langham Associates Ltd | Other services | 2001 |
| Langham Construction Ltd | Extraterritorial | 1999 |
| Langham Fruit Farms Limited(The) | Real estate | 1929 |
| Langham Hall Estate Limited | Agriculture & fishing | 2022 |
| Langham Hospitality Ventures Ltd | Financial services | 2026 |
| Langham Manor Developments Limited | Construction | 2011 |
| Langham Manor Property Limited | Construction | 2012 |
| Langham Place Ltd | Professional & scientific | 2015 |
| Langham Wills Ltd | Other services | 2010 |
| Langley Bidco Limited | Financial services | 2024 |
| Lankester Civils and Landscaping Limited | Construction | 2019 |
| Lanretise Limited | Health & social care | 2022 |
| Lansdowne Computer Consultants Limited | | 1987 |
| Lanswood Limited | Construction | 1999 |
| Lanswood Partners Limited | Real estate | 2026 |
| Lanvalley 1963 Limited | Extraterritorial | 2014 |
| Lapline Limited | Manufacturing | 1987 |
| Lapsafe Self-Service Solutions Limited | Manufacturing | 2017 |
| Larch Projects Ltd | Financial services | 2022 |
| Larch Solutions Ltd | Construction | 2021 |
| Larchwood Homes (Essex) Limited | Construction | 2023 |
| Larieshair Ltd | Other services | 2021 |
| Lark Aviation Limited | Transport & logistics | 2021 |
| Lark Rise (Colchester) Management Company Limited | Households | 2004 |
| Lark Rise Amenity Limited | Professional & scientific | 2018 |
| Larry Smart Cleaning UK Ltd | Administrative & support | 2024 |
| LAS Creations Ltd | Construction | 2018 |
| LAS Naranjas Sanguinas Ltd | Hospitality | 2024 |
| Lasacryl Ltd | Manufacturing | 2005 |
| Lascars 2017 Ltd | Wholesale & retail | 2018 |
| Laser Hair Removal by Jodie Limited | Health & social care | 2025 |
| Lasercare Anglia Limited | Manufacturing | 2000 |
| Laserone Limited | Other services | 2024 |
| Lash&Lab Ltd | Other services | 2018 |