| L & F Developments Limited | Construction | 2007 |
| L & O Property Ltd | Real estate | 2026 |
| L&D Logistics Limited | Transport & logistics | 2013 |
| L&M Agricultural Limited | Other services | 2016 |
| L&M Lettings LLP | | 2010 |
| L&M Property Lettings Ltd | Real estate | 2020 |
| L&R Delivery Ltd | Transport & logistics | 2026 |
| LA Compagnie MON AMI Limited | Health & social care | 2016 |
| LA HGV Limited | Transport & logistics | 2016 |
| LA Lightbars Ltd | Wholesale & retail | 2019 |
| Laburnum Gardens Residents Company Limited | Households | 2004 |
| Lagom Studio Ltd | Manufacturing | 2021 |
| Lakeside Fishing Lodges (Boston) Ltd | Hospitality | 2026 |
| Lakeside Fishing Lodges Ltd | Hospitality | 2019 |
| Lakeside Fishing Pods Ltd | Hospitality | 2021 |
| Lakeside Fishing Retreats Ltd | Hospitality | 2023 |
| Lakeside Fishing Retreats Sunrise Ltd | Hospitality | 2024 |
| Lakeside Fishing Retreats Sunset Ltd | Hospitality | 2024 |
| Lakeside Lettings (Boston) Ltd | Real estate | 2020 |
| Lalee Properties Ltd | Real estate | 2018 |
| Lambda Partnership Ltd | Information & communication | 2022 |
| Lambert Media Services Ltd | Professional & scientific | 2020 |
| Land Drainage Services Limited | Construction | 2004 |
| Landmax Estate Ltd | Real estate | 2021 |
| Larch Court Management Limited | Hospitality | 2001 |
| Larrington Trailers Hire & Sales Limited | Administrative & support | 2015 |
| Larrington Trailers Limited | Manufacturing | 2009 |
| Last Word Training Ltd | Other services | 2025 |
| Latrousse Ltd | Wholesale & retail | 2016 |
| LAU & IRE Limited | Wholesale & retail | 2020 |
| Laurenel Limited | Wholesale & retail | 2015 |
| Lawrence Ashley Ltd | Health & social care | 2023 |
| LB Deliveries Limited | Transport & logistics | 2015 |
| LB Refinishing Ltd | Wholesale & retail | 2022 |
| Lbmc Properties Ltd | Real estate | 2025 |
| LC Care Limited | Health & social care | 2025 |
| LC Media & Marketing Ltd | Professional & scientific | 2025 |
| LCR Construction Limited | Construction | 2012 |
| LCS Lincs Ltd | Construction | 2014 |
| LDC (Boston) Limited | Agriculture & fishing | 1964 |
| LDN Associates Ltd | Extraterritorial | 2006 |
| LE Properties (Boston) Ltd | Real estate | 2019 |
| LE Sign Limited | Professional & scientific | 2024 |
| LEE Hoff Financial Consultancy Limited | Financial services | 2015 |
| Lee's Training Services Limited | Other services | 2018 |
| Lefcs Limited | Health & social care | 2007 |
| Legacy Hospitality Ltd | Hospitality | 2016 |
| LEI Haul Ltd | Transport & logistics | 2026 |
| Leisure Services (Lincolnshire) Ltd. | Extraterritorial | 2019 |
| Lena&Anna Ltd | Wholesale & retail | 2016 |
| Lengvinas Driver Services Ltd | Transport & logistics | 2015 |
| Leonardas Properties Ltd | Real estate | 2025 |
| Leru Holdings Limited | Professional & scientific | 1997 |
| LET US LET U Ltd | Real estate | 2004 |
| LET US LET U Properties Limited | Real estate | 2007 |
| Lets Comply Property Rental Experts Limited | Real estate | 2023 |
| Lexa Labour Limited | Administrative & support | 2024 |
| Lietuviskas Skonis Limited | Hospitality | 2018 |
| Lifecity Limited | Information & communication | 2025 |
| Lighton Farming Ltd | Agriculture & fishing | 2019 |
| Lightweight Components Engineering Ltd | Construction | 2012 |
| Lime & Stone Harmony Limited | Construction | 2025 |
| Lin-Care-Shire Ltd | Health & social care | 2026 |
| Lin-Clean-Shire Cleaning Solutions Ltd | Administrative & support | 2019 |
| Linas Construction Group Ltd | Construction | 2025 |
| Linc's Motors Ltd | Wholesale & retail | 2023 |
| Linclnshire Ltd | Administrative & support | 2025 |
| Lincoln Blinds & Interiors Ltd | Wholesale & retail | 2024 |
| Lincoln by Design Ltd | Manufacturing | 2014 |
| Lincoln Living Ltd | Real estate | 2011 |
| Lincoln Trade Combine Limited | Wholesale & retail | 2022 |
| Lincoln Window Cleaner Limited | Administrative & support | 2025 |
| Lincolnshire Air Conditioning Solutions Ltd | Extraterritorial | 2018 |
| Lincolnshire Attractions Marketing Company Limited | Extraterritorial | 2009 |
| Lincolnshire Building Services Ltd | Construction | 2020 |
| Lincolnshire Classic VW Limited | Administrative & support | 2015 |
| Lincolnshire Cold Stores Ltd | Construction | 2023 |
| Lincolnshire Community and Voluntary Service | Health & social care | 1998 |
| Lincolnshire Elite Vehicles Limited | Wholesale & retail | 2025 |
| Lincolnshire Farm School Limited | Education | 2025 |
| Lincolnshire Firewood Company Limited | Extraterritorial | 2011 |
| Lincolnshire Fitness Ltd | Arts & recreation | 2023 |
| Lincolnshire Game Ltd | Manufacturing | 2015 |
| Lincolnshire Garden Supplies Ltd | Wholesale & retail | 2021 |
| Lincolnshire GAS Services Ltd | Construction | 2021 |
| Lincolnshire Mobile Cooling Services Ltd | Extraterritorial | 2024 |
| Lincolnshire Protection Services Limited | Administrative & support | 2016 |
| Lincolnshire Security Services Ltd | Administrative & support | 2021 |
| Lincolnshire Tiles Limited | Wholesale & retail | 2012 |
| Lincolnshire Tyre Collections Ltd | Water & waste | 2023 |
| Lincolnshire Vapours Ltd | Wholesale & retail | 2016 |
| Lincolnshire VEG Ltd | Wholesale & retail | 2025 |
| Lincolnshire Verge Harvesting Ltd | Agriculture & fishing | 2018 |
| Lincolnshire Wild Bird Seeds Limited | Wholesale & retail | 2008 |
| Lincolnshire Wills Ltd | Professional & scientific | 2011 |
| Lincolnshire Wolds Simulated Game Day Ltd | Arts & recreation | 2021 |
| Lincs Design Group Ltd | Professional & scientific | 2020 |
| Lincs Facial Fitness Limited | Other services | 2017 |
| Lincs Firewood Company Ltd | Wholesale & retail | 2011 |
| Lincs Grading Ltd | Manufacturing | 2026 |