| Lawson's Bar & Bistro Ltd | Hospitality | 2018 |
| Lawton Development Consultancy Ltd | Professional & scientific | 2025 |
| Laycomm Ltd | Information & communication | 2026 |
| Layered Defence Limited | Professional & scientific | 2019 |
| Layhe Contracting Limited | Construction | 2019 |
| Layioye Holdings Ltd | Real estate | 2026 |
| Laziza Limited | Hospitality | 2025 |
| Lazzari's Pizza Ltd | Hospitality | 2024 |
| LB Decorating Services Limited | Construction | 2022 |
| LB Estates (Lincoln) Ltd | Real estate | 2021 |
| LB Mablethorpe Limited | Construction | 2007 |
| LBC Building & Joinery Services Ltd | Construction | 2026 |
| LBN UK Lincoln Ltd | Extraterritorial | 2013 |
| LC Community Projects Ltd | Real estate | 2013 |
| LC Funeral Plans Limited | Other services | 2022 |
| Lcar Ltd | Hospitality | 2022 |
| Lcci Services Limited | Administrative & support | 2016 |
| LCH Therapeutic Care Ltd | Health & social care | 2025 |
| LCJ Enterprises Ltd | Information & communication | 2013 |
| LCL Homes Ltd | Real estate | 2017 |
| LCN Contract & Hire Ltd | Transport & logistics | 2020 |
| Lcnh Limited | Health & social care | 2021 |
| LCS IT Solutions Ltd | Information & communication | 2002 |
| LCS Pension Trustee Limited | Professional & scientific | 2024 |
| LCS Retail Limited | Wholesale & retail | 1996 |
| Lcsw Estates Ltd | Households | 2025 |
| LCT Properties Ltd | Real estate | 1998 |
| Lctn Transport Ltd | Transport & logistics | 2025 |
| LCW Developments Limited | Construction | 2018 |
| LD Body Studio Ltd | Other services | 2026 |
| LD Property Development Limited | Construction | 2022 |
| LDC Biohealth Limited | Health & social care | 2025 |
| LDD Solutions Ltd | Professional & scientific | 2025 |
| LE Distribution Ltd | Transport & logistics | 2026 |
| LE Marchant Farms Limited | Agriculture & fishing | 1947 |
| LE Peche Mignon Limited | Wholesale & retail | 2007 |
| LE Sanctuaire on Steep Hill Limited | Other services | 2014 |
| LE Santo Ltd | Information & communication | 2025 |
| Leadenham Polo Club Limited | Arts & recreation | 2006 |
| Leadership Development Partnership Ltd | Education | 2012 |
| Leading Green Ltd | Education | 2019 |
| Leading Light Technologies Limited | Administrative & support | 2008 |
| Leadr Group Ltd | Wholesale & retail | 2024 |
| Leafbridge Limited | Construction | 2013 |
| Leafbridge Management Limited | Real estate | 2019 |
| Lean Communications Limited | Financial services | 2024 |
| Leanworking Limited | Information & communication | 2009 |
| Lebolo's Ltd | Hospitality | 2018 |
| LEE Medical Limited | Health & social care | 2019 |
| LEE Paton Logistics Ltd | Transport & logistics | 2013 |
| Leedon Ltd | Households | 2013 |
| Leepiciu Limited | Wholesale & retail | 2023 |
| Leesing Projects Limited | Construction | 2006 |
| Leffler Limited | Financial services | 2022 |
| Leffler Search Limited | Administrative & support | 2021 |
| Leffler Ventures Limited | Financial services | 2022 |
| LEG Stump Promotions Ltd | Administrative & support | 2009 |
| Legacy Property Global Limited | Real estate | 2025 |
| Legal Services Lincolnshire (Trading) Limited | Professional & scientific | 2020 |
| Legend Marketing Company Ltd | Professional & scientific | 2012 |
| Legends of Nottinghamshire Limited | Manufacturing | 2010 |
| Leggate Leisure Ltd | Agriculture & fishing | 2017 |
| Leiland Services Limited | Construction | 2018 |
| LEN Kirk Plant Hire Ltd | Professional & scientific | 2023 |
| Lenoco Ltd | Professional & scientific | 2017 |
| Lensbomber Ltd | Extraterritorial | 2023 |
| Leo's Catering Service Limited | Hospitality | 2014 |
| Leo's LMB Ltd | Other services | 2020 |
| Leos Cottage Ltd | Hospitality | 2023 |
| Leos Retreat Ltd | Other services | 2023 |
| Leo’S Properties and Developments Ltd | Construction | 2026 |
| Let-Co Property Ltd | Real estate | 2019 |
| Lets Make a Plan Ltd | Financial services | 2026 |
| Letscompli Ltd | Households | 2025 |
| Letsearch Limited | Real estate | 2003 |
| Letsrent Lincoln Limited | Real estate | 2013 |
| Letsure Underwriting Limited | Extraterritorial | 1995 |
| Letsure Underwriting Management Limited | Extraterritorial | 1995 |
| Level 1 Group Limited | Administrative & support | 2018 |
| Level-Up Game Therapy Ltd | Health & social care | 2024 |
| Leveless Printing Limited | Manufacturing | 2016 |
| Leventogiannis Cardiac Services Ltd | Health & social care | 2022 |
| Leveret Properties Limited | Real estate | 2017 |
| Levitt Services Ltd | Manufacturing | 2018 |
| Lewis & Daughter Ltd | Transport & logistics | 2017 |
| Lewis and Klein Associates Limited | Construction | 2018 |
| Lewis Mortgages Limited | Financial services | 2024 |
| Lewis Spencer Construction Ltd | Construction | 2022 |
| Lewis Spencer Properties Ltd | Real estate | 2025 |
| Lewis Transport Solutions Ltd | Transport & logistics | 2022 |
| Lewmac Developments Ltd | Construction | 2021 |
| Lexicon Spectrum Ltd | Hospitality | 2025 |
| LF LN5 2019 Ltd | Hospitality | 2020 |
| LGB Medical Ltd | Health & social care | 2017 |
| LGJ Plumbing & Heating Limited | Construction | 2021 |
| LHO Lettings Ltd | Real estate | 2021 |
| Liaison Group UK Ltd | Professional & scientific | 2021 |
| Libc Catering Ltd | Hospitality | 2023 |
| Liberty Automotive Ltd | Wholesale & retail | 2022 |
| Liberty Physiotherapy and Rehabilitation Limited | Health & social care | 2005 |