| Lincolnshire Commercial Maintenance Limited | Construction | 2019 |
| Lincolnshire Field Products Limited | Agriculture & fishing | 1984 |
| Lincolnshire Gardens Trust Limited | Other services | 1995 |
| Lincolnshire Home Care Limited | Health & social care | 2015 |
| Lincolnshire Pools & Spas Ltd | Wholesale & retail | 2016 |
| Lincolnshire Property Investments Ltd | Real estate | 2015 |
| Lincolnshire RE - Roofs Ltd | Construction | 2025 |
| Lincolnshire Resin Drives Ltd | Construction | 2018 |
| Lincolnshire Roller Shutters Ltd | Construction | 2023 |
| Lincoltdrive Ltd | Transport & logistics | 2025 |
| Lincs Alarms Ltd | Administrative & support | 2022 |
| Lincs Bookkeeping Limited | Professional & scientific | 2015 |
| Lincs Build Contracting Limited | Construction | 2019 |
| Lincs Build Group Limited | Construction | 2025 |
| Lincs Building Contractors Ltd | Construction | 2020 |
| Lincs Cars and Commercials Ltd | Transport & logistics | 2025 |
| Lincs Comms Limited | Construction | 2024 |
| Lincs Enterprises Limited | Real estate | 2025 |
| Lincs Forage Limited | Agriculture & fishing | 2008 |
| Lincs HGV Parking Ltd | Transport & logistics | 2022 |
| Lincs Maintenance Services Ltd | Manufacturing | 2026 |
| Lincs Mobile Auto Services Ltd | Wholesale & retail | 2022 |
| Lincs Pet Supplies Limited | Wholesale & retail | 2020 |
| Lincs Property Ltd | Construction | 2016 |
| Lincs Pumps & Pipelines Limited | Construction | 2003 |
| Lincs Roofs Ltd | Construction | 2025 |
| Lindenwood Home Limited | Construction | 2019 |
| Linen & Cotton Limited | Wholesale & retail | 2013 |
| Lingarden Flowers Limited | Professional & scientific | 2026 |
| Link-On Sales & Marketing Ltd | Wholesale & retail | 2014 |
| Linnic Properties Ltd | Construction | 2025 |
| Linx Construction (UK) Limited | Construction | 2012 |
| Lion Investment Group Ltd | Real estate | 2018 |
| Lion Property Maintenance Limited | Construction | 2023 |
| Lion Transport Ltd | Transport & logistics | 2016 |
| Lions Sports Travel Ltd | Administrative & support | 2015 |
| Lisa Mair Physiotherapy Ltd | Arts & recreation | 2015 |
| Lisa Wright Recruitment Services Ltd | Administrative & support | 2018 |
| Literkowo- Centre of Education CIC | Administrative & support | 2023 |
| Lithuanian Deli Limited | Wholesale & retail | 2018 |
| Little Berries Cafe Ltd | Arts & recreation | 2025 |
| Little Lion Digital Ltd | Information & communication | 2025 |
| Little Oaks Childcare (Spalding) Ltd | Health & social care | 2013 |
| Little Treasures Nurseries (Pinchbeck) Ltd | Other services | 2011 |
| Little Treasures Nurseries Holbeach Ltd | Education | 2015 |
| Little Treasures Nurseries Kirton Ltd | Other services | 2017 |
| Little Treasures Nurseries Ltd | Education | 2009 |
| Littleworth Nurseries Limited | Agriculture & fishing | 1985 |
| Live Lighting Limited | Manufacturing | 2014 |
| Live Music and Entertainment Limited | Extraterritorial | 2008 |
| Live Promotions Events Limited | Arts & recreation | 2000 |
| Live Promotions Limited | Arts & recreation | 1980 |
| Livingstone Design Group Ltd | Professional & scientific | 2024 |
| Liviu Trans (LN) Ltd | Transport & logistics | 2019 |
| Liwtrans Ltd | Transport & logistics | 2025 |
| Lizmed Consulting Limited | Professional & scientific | 2015 |
| LJ Price Property Ltd | Construction | 2019 |
| Ljse Limited | Wholesale & retail | 2026 |
| LJT Services Ltd | Wholesale & retail | 2018 |
| LLB Decorating Limited | Construction | 2019 |
| LLJ Scaffolding Services Limited | Construction | 2019 |
| LMB Homes Limited | Real estate | 2021 |
| LMB Properties (Lincs) Limited | Real estate | 2018 |
| LMK Park Homes Ltd | Construction | 2025 |
| LMP Holdings Group Ltd | Financial services | 2024 |
| LMP Procare Limited | Construction | 2025 |
| LMP Solutions Limited | Construction | 2022 |
| LMS Trade Supplies Ltd | Wholesale & retail | 2026 |
| LMS Trading Ltd | Wholesale & retail | 2014 |
| LMT Heritage Ltd | Wholesale & retail | 2026 |
| Lnded Ltd | Professional & scientific | 2026 |
| LNT Design & Fabrications Ltd | Manufacturing | 2024 |
| Loach Brake Limited | Financial services | 2007 |
| Loach Pubs Ltd | Hospitality | 2023 |
| Loaded Jacks Ltd | Manufacturing | 2025 |
| Lobacore Ltd | Information & communication | 2025 |
| Local Landscapes (SE) Ltd | Administrative & support | 2021 |
| Loch (Eastern) Ltd | Transport & logistics | 2017 |
| Lockie & Leakie Property Maintenance Limited | Construction | 2026 |
| Lodge Farm Cafe Ltd | Wholesale & retail | 2013 |
| Lodge Farm Truckstop Ltd | Wholesale & retail | 2013 |
| Logan Recruitment Ltd | Administrative & support | 2020 |
| Logic Plastering Ltd | Construction | 2024 |
| Logical Property Solutions Limited | Other services | 2025 |
| Logistics Support Services Ltd | Transport & logistics | 2018 |
| LOL Dental Care Ltd | Health & social care | 2025 |
| Loman Miller Associates Ltd | Extraterritorial | 2011 |
| Loman Miller Consulting Ltd | Professional & scientific | 2022 |
| London Gifts Ltd | Wholesale & retail | 2024 |
| Long Sutton Dentistry Limited | Health & social care | 2013 |
| Long Sutton Mots Ltd | Wholesale & retail | 2021 |
| Long Sutton Tyres Ltd | Wholesale & retail | 2023 |
| Long's (Furnishers) Limited | Real estate | 1947 |
| Longfield Commercials Limited | Transport & logistics | 1998 |
| Longview Healthcare Services Ltd | Health & social care | 2018 |
| Loop Factory AI Limited | Information & communication | 2025 |
| Loosegate Developments (Long Sutton) Limited | Construction | 2020 |
| Loosegate Group Limited | Financial services | 2024 |
| Loosegate Holdings Limited | Financial services | 2018 |
| Loosegate Homes Limited | Extraterritorial | 2018 |