| J.H.A. Winter and Sons Limited | Construction | 2003 |
| Jamie Edmond Cleaning Services Ltd | Administrative & support | 2025 |
| Jasmin Network Ltd | Information & communication | 2017 |
| Just Pudding Basins Limited | Manufacturing | 2011 |
| Just Pudding Basins Trustees Limited | Professional & scientific | 2022 |
| K M Stubbs Property Ltd | Real estate | 2013 |
| Kalog-Autos Ltd | Wholesale & retail | 2025 |
| Kelham Car Hire (Newark) Limited | Transport & logistics | 2009 |
| Kelham-Wood Car Sales Ltd | Wholesale & retail | 2014 |
| KGS Interim Support Limited | Professional & scientific | 2014 |
| Kirkstead Holiday Park Limited | Arts & recreation | 1989 |
| KRK GAS Services Ltd | Other services | 2019 |
| Kurnia Intertrade Limited | Real estate | 1977 |
| Laser Craft Shapes Limited | Wholesale & retail | 2015 |
| Lemon Tree Consultancy Ltd | Professional & scientific | 2025 |
| Levett Property Holdings Limited | Real estate | 2017 |
| Lincolnshire Plumbing and Heating Limited | Construction | 2025 |
| Lincolnshire Stained Glass Studio Limited | Construction | 2012 |
| Lion Wrestling Promotions Ltd | Arts & recreation | 2021 |
| Living With Reflux | Health & social care | 2008 |
| Lloyd Court Residents' Association Limited | Households | 1993 |
| LNS Hospitality Limited | Hospitality | 2025 |
| Lock and Load Storage Ltd | Transport & logistics | 2025 |
| Lockton Properties Limited | Financial services | 2023 |
| Luxefit Bathrooms Limited | Construction | 2025 |
| LV EAR Care Ltd | Other services | 2025 |
| Mable Opticians Ltd | Wholesale & retail | 2023 |
| Mablethorpe Ice Cream Company Ltd | Wholesale & retail | 2020 |
| Mablethorpe Integrated Clinic Ltd | Health & social care | 2024 |
| Mablethorpe Joinery Services Limited | Manufacturing | 2005 |
| Mablethorpe Rock and Ices Limited | Wholesale & retail | 2010 |
| Mablethorpe Seal Sanctuary Limited | Arts & recreation | 2011 |
| Mambos Pizza Ltd | Hospitality | 2022 |
| Manic Music Productions Limited | Arts & recreation | 1997 |
| Manning's Family Funfair Limited | Arts & recreation | 1989 |
| Marisco Medical Practice Ltd | Real estate | 2018 |
| Mason Court (Sutton-On-Sea) Management Company Limited | Other services | 2005 |
| Measures IT Services Limited | Information & communication | 2019 |
| Megamarts.Co.Uk Ltd | Wholesale & retail | 2009 |
| Mermaid Caravan Park Limited | Hospitality | 2013 |
| MGC Websites Ltd | Information & communication | 2018 |
| MHD Construction Services Limited | Construction | 2020 |
| Midas Residential Limited | Real estate | 2015 |
| Mitchell Bond Leisure Ltd | Arts & recreation | 2022 |
| Mo's Indian Cuisine Limited | Hospitality | 2023 |
| Model Design Construction Ltd | Manufacturing | 2013 |
| Morley Contracting Services Limited | Manufacturing | 1998 |
| Morley Property Lincs Limited | Real estate | 2021 |
| Nautical Notions Limited | Wholesale & retail | 2006 |
| New Delight Chinese Food Limited | Hospitality | 2022 |
| Newark Security Services Limited | Administrative & support | 1997 |
| Nicos Luxury Home & Gifts Limited | Wholesale & retail | 2025 |
| Nightingale Group Holdings Limited | Financial services | 2017 |
| Norton Grove Consultancy Ltd | Information & communication | 2020 |
| Omega Holdings UK Limited | Financial services | 2009 |
| Omega Supplies UK Limited | Other services | 2007 |
| P & C'S Property Developments(Lincs) Ltd | Real estate | 2019 |
| P & S Construction Management Ltd | Construction | 2025 |
| Panda China Mablethorpe Ltd | Hospitality | 2025 |
| Pandachina Ltd | Hospitality | 2024 |
| Park View Guest House (2011) Limited | Hospitality | 2011 |
| Pentagon Solutions Ltd | Wholesale & retail | 2012 |
| Philip Ross Accountants Limited | Professional & scientific | 2003 |
| Pizza Square Sutton Limited | Hospitality | 2024 |
| Poachers PRE65 Classic Trials Club Limited | Arts & recreation | 2025 |
| Presto Takeaway Limited | Hospitality | 2018 |
| Priden Construction Limited | Construction | 2023 |
| Priyasri Ltd | Wholesale & retail | 2024 |
| Promenaders Dance Club Limited | Arts & recreation | 2022 |
| R & W Accountancy Services Ltd | Professional & scientific | 2020 |
| R Arnold Funeral Services Limited | Other services | 2009 |
| RD Electrical Network Ltd | Construction | 2017 |
| RJH Property Group Ltd. | Professional & scientific | 2003 |
| ROB Crisp HR Consultancy Ltd | Professional & scientific | 2025 |
| Robert Howell Construction Service Limited | Construction | 1987 |
| Rotaset Printers Limited | Manufacturing | 1974 |
| Rushcliffe Business Solutions Limited | Professional & scientific | 2006 |
| S & S Garage Service Limited | Wholesale & retail | 2003 |
| S.T.A Transport Limited | Transport & logistics | 2017 |
| Salty's Mablethorpe Ltd | Hospitality | 2011 |
| Sandilands Residents Company Limited | Hospitality | 1978 |
| Sapphire Estates & Leisure Ltd | Administrative & support | 1997 |
| SB Water Ltd | Construction | 2020 |
| Sea Salt and Butter Bakehouse Ltd | Manufacturing | 2026 |
| Seacroft Garage Limited | Wholesale & retail | 2006 |
| Seacroft Holiday Estate (Trusthorpe) Limited | Wholesale & retail | 1971 |
| Second Star Fabric Ltd | Wholesale & retail | 2017 |
| Serl Seashells Limited | Hospitality | 2021 |
| Shand Trading Ltd | Wholesale & retail | 2025 |
| Sherwood Cars (Newark) Limited | Transport & logistics | 2009 |
| Shuangzun International Ltd | Professional & scientific | 2024 |
| Silverscreen Solutions Ltd | Professional & scientific | 2025 |
| Sizelaron Ltd | Hospitality | 2025 |
| Smartie Pants Day Nursery Limited | Health & social care | 2025 |
| Smartie Pants Nursery Ltd | Health & social care | 2025 |
| Smith and Boothe Electrical Ltd | Construction | 2021 |
| Southpaw Gym Ltd | Arts & recreation | 2024 |
| SPG Property Owners Ltd | Real estate | 2023 |
| SS Holdings Skegness Ltd | Administrative & support | 2017 |
| ST Annes Cafeteria Limited | Hospitality | 2024 |