| KAG Hospitality Ltd | Hospitality | 2024 |
| Kana Trade Ltd. | Wholesale & retail | 2016 |
| Kandavil Limited | Real estate | 2019 |
| Karaca Foods Ltd | Hospitality | 2022 |
| Karma Medical Solutions Limited | Wholesale & retail | 2021 |
| Karmosia Speakup Ltd | Professional & scientific | 2025 |
| KCG Surveys Ltd | Professional & scientific | 2021 |
| KCS Business Services Ltd | Professional & scientific | 2018 |
| Keates Cleaning & Maintenance Limited | Administrative & support | 2025 |
| Kelly's Plumbing & Heating Ltd | Construction | 2006 |
| Kick ASH Vapes Limited | Wholesale & retail | 2019 |
| Kiddotco Limited | Wholesale & retail | 2011 |
| King Commercial & Residential Ltd | Real estate | 2025 |
| Kingsway Court Management Company (Cleethorpes) Limited | Households | 1995 |
| Kingsway Hotel Limited | Hospitality | 2012 |
| Kitchen 2 Curb Ltd | Hospitality | 2024 |
| Kjal Homes Limited | Real estate | 2024 |
| KJO Testing Ltd | Professional & scientific | 2020 |
| Klass Training Ltd | Professional & scientific | 2014 |
| Krisbud Ltd. | Transport & logistics | 2014 |
| KS Industrial Services Ltd | Construction | 2022 |
| KT Stores Ltd | Wholesale & retail | 2024 |
| Kurz-Addison (Hove) Limited | Wholesale & retail | 2006 |
| Kwikspace Limited | Administrative & support | 2019 |
| Kymart Limited | Construction | 2019 |
| L & C Roofing and Cladding Limited | Construction | 2017 |
| L & H Properties (Grimsby) Limited | Real estate | 2026 |
| L&H Family Properties Limited | Real estate | 2024 |
| L&M Bars and Stalls Ltd | Manufacturing | 2025 |
| L&T Furnishings Ltd | Wholesale & retail | 2025 |
| L.A.R Services Limited | Administrative & support | 2020 |
| LA Bella Restaurant (Cleethorpes) Ltd | Hospitality | 2022 |
| Labelclo Ltd | Wholesale & retail | 2023 |
| Lachica Ltd | Wholesale & retail | 2025 |
| Lacuna@Aspacebetweenwalls Ltd | Wholesale & retail | 2023 |
| Lacy Properties Ltd | Real estate | 2024 |
| Ladd Property Services Ltd | Real estate | 2022 |
| Lady B'S Cupcakery Ltd | Hospitality | 2018 |
| Ladybrook Fish Bar Limited | Hospitality | 2018 |
| Laeta Limited | Real estate | 2023 |
| Lakeside Station Limited | Hospitality | 2014 |
| LAM Project Services Limited | Professional & scientific | 2009 |
| Lama Enterprise Limited | Wholesale & retail | 2014 |
| Lancashire Powerboat Racing Club Limited | Other services | 1947 |
| Lapizzaria IC Ltd | Hospitality | 2025 |
| Larchwell Limited | Construction | 1981 |
| Later Life Partnership NEL Community Interest Company | Health & social care | 2025 |
| Lavender Hill Hair Rooms Limited | Other services | 2015 |
| LB Autocare Services Ltd | Wholesale & retail | 2025 |
| LB Houses Limited | Real estate | 2021 |
| LB26 Medical Services Ltd | Public administration | 2023 |
| LBP Plant Ltd | Administrative & support | 2020 |
| LEE Diable Window Cleaners Limited | Administrative & support | 2011 |
| LEE Gough Ltd | Real estate | 2019 |
| Legend Food Ltd | Hospitality | 2025 |
| Leigh Lacy Design & Marketing Ltd | Professional & scientific | 2024 |
| Lestrange 30 Clee Limited | Real estate | 2023 |
| LET MOR Homes Limited | Real estate | 2022 |
| LET US Rent Properties Limited | Real estate | 2023 |
| LFS (Lincs) Ltd | Construction | 2024 |
| LHA Building & Maintenance Ltd | Construction | 2024 |
| LHC Cleethorpes Ltd | Hospitality | 2017 |
| Lightening Supplies Ltd | Energy | 2023 |
| Lilies of Cleethorpes Limited | Wholesale & retail | 2013 |
| Lilly's Little GEM Cafe Limited | Hospitality | 2023 |
| Lilsocial Ltd | Information & communication | 2025 |
| Lincolnshire Carpets Limited | Wholesale & retail | 2019 |
| Lincolnshire Medical Services Ltd | Professional & scientific | 2022 |
| Lincolnshire Motorcycles Limited | Wholesale & retail | 2009 |
| Lincolnshire Pubs and Bars Ltd | Hospitality | 2025 |
| Lincolnshire Wolds Ltd | Hospitality | 2024 |
| Lincs Automotive Ltd | Wholesale & retail | 2019 |
| Lincs Coast Lettings Ltd | Real estate | 2022 |
| Lincs Decor Limited | Construction | 2023 |
| Lincs Hospitality Limited | Hospitality | 2018 |
| Lincs Industrial Painters Limited | Wholesale & retail | 2017 |
| Lincs Kitchen and Upvc Spray Painters Ltd | Construction | 2020 |
| Lincs Luxury Travel Limited | Other services | 2009 |
| Lincs Safety Consultants Ltd | Professional & scientific | 2026 |
| Lincs Technical Rigging Solutions Ltd | Construction | 2025 |
| Lincs Valeting Solutions Ltd | Administrative & support | 2024 |
| Lincstherapy Ltd | Health & social care | 2018 |
| Littlebars Ltd | Hospitality | 2024 |
| LJM Property Lettings Limited | Real estate | 2011 |
| LMR Block Paving Ltd | Construction | 2016 |
| Locum Oculist Ltd | Health & social care | 2025 |
| Logcabin Trading Limited | Wholesale & retail | 2013 |
| London & Towergate Properties Limited | Construction | 1978 |
| Lord Street Chippy Limited | Hospitality | 2016 |
| Lord Street Motors Limited | Wholesale & retail | 2024 |
| Lotus Care Solutions Private Limited | Health & social care | 2025 |
| Loud & BOW Limited | Information & communication | 1985 |
| Lounge UK Group Limited | Arts & recreation | 2019 |
| Louth Road Ltd | Hospitality | 2023 |
| Louth Tyre Center Ltd | Wholesale & retail | 2023 |
| Love Fibre Limited | Information & communication | 2017 |
| Lovemerry Ltd | Wholesale & retail | 2013 |
| LPT Investments Ltd | Real estate | 2026 |
| LRG Housing Ltd | Real estate | 2025 |
| LRK Rebar Specialists Limited | Construction | 2016 |