| Landmark International School, Cambridge | Education | 2016 |
| Landoak (Comberton) Limited | Real estate | 2016 |
| Landoak (Melbourn) Limited | Real estate | 2021 |
| Landoak Estates Limited | Real estate | 2007 |
| Landoak Renewables Oakley Limited | Real estate | 2022 |
| Landoak Renewables Wickham Hall Limited | Real estate | 2021 |
| Landscaping Cambridge Limited | Administrative & support | 2020 |
| Landsgreen Property Limited | Real estate | 2022 |
| Lanecare Limited | Construction | 2002 |
| Laneco Ltd | Real estate | 2022 |
| Laneco Property Trading Ltd | Construction | 2026 |
| Langdon Construction Limited | Construction | 2007 |
| Langford Arch Properties Ltd | Real estate | 2009 |
| Langley & Co. Accountants Ltd | Professional & scientific | 2007 |
| Langley International Investments Limited | Wholesale & retail | 2017 |
| Langtrade Ltd | Construction | 2020 |
| Language Technology Centre Limited | Administrative & support | 1992 |
| Language Testing 123 Ltd. | Information & communication | 2011 |
| Laniro Limited | Construction | 2009 |
| Lanna Thai Massage and Therapy Ltd | Health & social care | 2022 |
| Lansharks (UK) Limited | Information & communication | 1998 |
| Lanteglos Logistics Limited | Other services | 2020 |
| Lanthanum Ltd | Professional & scientific | 2024 |
| Lantzman Properties Ltd | Real estate | 2020 |
| Lapse Film Limited | Information & communication | 2013 |
| Lara Barber Ltd | Other services | 2024 |
| Largence Group Ltd | Information & communication | 2025 |
| Larion Creations Ltd | Manufacturing | 2024 |
| Lark Probuild Ltd. | Other services | 2012 |
| Lark Trading Limited | Wholesale & retail | 1999 |
| Larkland Ltd | Construction | 2021 |
| Larkspur Developments Limited | Extraterritorial | 2023 |
| Larkspur Limited | Construction | 2016 |
| Larkspur Property Limited | Construction | 2023 |
| Larrikin Limited | Information & communication | 2007 |
| Laser-Scan Engineering Limited | Manufacturing | 2003 |
| Laserderm Ltd. | Health & social care | 2006 |
| Lasermark Solutions Ltd | Professional & scientific | 2018 |
| Lasernet Limited | Information & communication | 1989 |
| Late Liquor Ltd | Transport & logistics | 2019 |
| Late Night Games Limited | Information & communication | 2017 |
| Latencore AI Limited | Information & communication | 2025 |
| Latham Builders Limited | Construction | 2014 |
| Latitude 38 Consulting Ltd | Professional & scientific | 2012 |
| Latom Limited | Information & communication | 2025 |
| Lattico Limited | Information & communication | 2004 |
| Latymer Holdings Limited | Professional & scientific | 2025 |
| Latymer Search Limited | Professional & scientific | 2021 |
| Laudate Limited | Real estate | 2025 |
| Laude Stores Limited | Other services | 2019 |
| Laughtons Construction Contractors Limited | Construction | 2021 |
| Launchpadyt Limited | Information & communication | 2025 |
| Launchpulse Ltd | Information & communication | 2025 |
| Launton Stores Limited | Wholesale & retail | 2019 |
| Laur Consulting Ltd | Manufacturing | 2024 |
| Laura Park Consultancy Ltd | Professional & scientific | 2023 |
| Laurab Composites Ltd | Manufacturing | 2026 |
| Lauro Management Limited | Real estate | 2012 |
| Lava Logic Ltd | Information & communication | 2018 |
| Lavaca Properties Ltd | Real estate | 2021 |
| Lavem Chine Pharm Ltd | Extraterritorial | 2013 |
| Lavender Fitness Limited | Arts & recreation | 2024 |
| Lavender Hill Residential Ltd | Real estate | 2025 |
| Law and Lewis of Cambridge Limited | Manufacturing | 2014 |
| Law Community Support Ltd | Information & communication | 2024 |
| Law Staff Limited | Administrative & support | 2023 |
| Law Storage Cambridge LLP | | 2017 |
| Lawcru Limited | Administrative & support | 2025 |
| Lawd Holdings Limited | Financial services | 2026 |
| Lawexchange International Ukeig | Professional & scientific | 1994 |
| Lawford Power Limited | Manufacturing | 2021 |
| Lawrence Square Management Company Limited | Real estate | 2014 |
| Lawson & Fils Ltd | Information & communication | 2016 |
| Lawson Close Freehold Limited | Households | 2007 |
| Lawson Close Management Limited | Real estate | 2004 |
| Laxton Gardens (Oundle) Residents Management Company Limited | Households | 2016 |
| LAY by Keycodes Ltd | Hospitality | 2025 |
| Layer 9 Ltd | Information & communication | 2009 |
| Layer Grain Limited | Manufacturing | 2025 |
| Layzell Land Holdings Limited | Real estate | 2021 |
| Lazo & Co Properties Ltd | Real estate | 2023 |
| Lazybun Limited | Information & communication | 2019 |
| LB Tiling Ltd | Construction | 2022 |
| LBE Artistry Ltd | Other services | 2023 |
| LBH Management Company Limited | Households | 2018 |
| LBP Creative Production Limited | Professional & scientific | 2022 |
| LBW Advocates & Consultants Ltd | Professional & scientific | 2016 |
| LC Animal Services Ltd | Other services | 2021 |
| LC Trans Ltd | Transport & logistics | 2025 |
| LC90 Ltd | Manufacturing | 2024 |
| LCA Coaching & Consulting Ltd | Professional & scientific | 2023 |
| Lcgrowth Limited | Professional & scientific | 2026 |
| LCR Consulting Services Ltd | Professional & scientific | 2024 |
| Lcreis Ltd | Manufacturing | 2025 |
| LCS Cambridge Ltd | Real estate | 2019 |
| LCS Events Limited | Administrative & support | 2016 |
| Lcuk Cambridge Limited | Other services | 2018 |
| LCW Law Associates Ltd | Professional & scientific | 2021 |
| LD Market Ltd | Wholesale & retail | 2026 |
| LD Parks Ltd | Hospitality | 2026 |