| Law Bars Ltd | Hospitality | 2025 |
| Lilbourne Operations Ltd | Wholesale & retail | 2015 |
| Lily Personal Assistant & Housekeeping Ltd | Administrative & support | 2024 |
| Lincs Estates Ltd | Real estate | 2026 |
| LLL Transport Ltd | Transport & logistics | 2019 |
| Loop Trans Ltd | Transport & logistics | 2025 |
| Luca Carrier Ltd | Transport & logistics | 2019 |
| Lucian Florin Ltd | Transport & logistics | 2021 |
| Lucid Ideas Ltd | Information & communication | 2012 |
| Lucky Hot Meals Limited | Hospitality | 2026 |
| Luna Athena Ltd | Other services | 2019 |
| M Dale Limited | Construction | 2013 |
| M H Pneumatics Limited | Wholesale & retail | 2002 |
| M Sauvage Limited | Manufacturing | 2012 |
| M Shuttle Interiors Limited | Construction | 2015 |
| M.E.D. Transport Ltd | Transport & logistics | 2018 |
| M.E.J Scaffolding Ltd | Construction | 2019 |
| MA Fairview Properties Limited | Real estate | 2022 |
| Mabentex Ltd | Professional & scientific | 2025 |
| Maple Lifting UK Ltd | Manufacturing | 2019 |
| MARINE365 Limited | Information & communication | 2018 |
| Mark Ellis Motor Services Limited | Wholesale & retail | 2004 |
| Marketing Superstars Limited | Professional & scientific | 2020 |
| Maurice Mawer Engineering Limited | Professional & scientific | 1999 |
| Mawers Machining Limited | Manufacturing | 2023 |
| MBI Electrical & Plumbing Ltd | Construction | 2020 |
| Mccue Driving Services Ltd | Administrative & support | 2020 |
| MD Cars Service Ltd | Wholesale & retail | 2026 |
| MDP Projects Limited | Construction | 2017 |
| Measurement Development Limited | Extraterritorial | 2014 |
| MED Control UK Ltd | Mining & quarrying | 2025 |
| Media Excel Limited | Other services | 2002 |
| Meridian Health Group Limited | Health & social care | 2018 |
| Mirtrans Logistics Ltd | Transport & logistics | 2021 |
| MJ Driver and Labour Services Limited | Transport & logistics | 2025 |
| MLK Storage Limited | Transport & logistics | 2023 |
| MLS Haulage Ltd | Transport & logistics | 2022 |
| Motanul Ltd | Transport & logistics | 2022 |
| Mwarchy Ltd | Information & communication | 2025 |
| N Scott Engineering Limited | Other services | 2009 |
| Naija Bites Ltd | Hospitality | 2025 |
| Nextdrive Motors Ltd | Wholesale & retail | 2025 |
| Nigwels Ltd | Transport & logistics | 2009 |
| NIK Em-H Ltd | Transport & logistics | 2016 |
| Nikbo Limited | Professional & scientific | 2022 |
| Nippon Sanso UK Limited | Manufacturing | 2016 |
| North Killingholme Property Management Ltd | Real estate | 2014 |
| North to South Automotive Services Ltd | Wholesale & retail | 2024 |
| NPG Global Ltd | Wholesale & retail | 2025 |
| NWO Grimsby Ltd | Arts & recreation | 2024 |
| Oak Consult Limited | Professional & scientific | 2013 |
| Oancea&Iftimi Global Corporation Ltd | Professional & scientific | 2025 |
| Olieli Limited | Health & social care | 2017 |
| ON Line Construction Limited | Extraterritorial | 2014 |
| ON Line Design & Engineering Limited | Manufacturing | 1982 |
| ON Line Group Limited | Professional & scientific | 2012 |
| ON Line Hire Limited | Administrative & support | 2014 |
| ON Line People Limited | Administrative & support | 2012 |
| ON Line Support Personnel Limited | Administrative & support | 2012 |
| Orapo Ltd | Professional & scientific | 2023 |
| Oxbow UK Limited | Wholesale & retail | 1913 |
| P Roofing Services Ltd | Construction | 2023 |
| P.I.C. Transport Ltd | Transport & logistics | 2022 |
| P.K. Construction (Lincs) Limited | Construction | 2002 |
| Pach Trans Ltd | Transport & logistics | 2020 |
| Painting and Labour Services Limited | Manufacturing | 1988 |
| Parkinsonmartin Properties Ltd | Real estate | 2018 |
| Parwel Properties Ltd | Construction | 2025 |
| Passport IT Limited | Information & communication | 2013 |
| Patio Blinds UK Limited | Wholesale & retail | 2021 |
| Pearce Automotive Repairs Limited | Wholesale & retail | 2019 |
| Pelham Carpets Limited | Wholesale & retail | 2018 |
| Pelham Coffee Shop (Immingham) Limited | Wholesale & retail | 2024 |
| Pelham Motors Ltd | Wholesale & retail | 2024 |
| Pelham Transport Services Ltd | Transport & logistics | 2023 |
| Penchant Driving Services Ltd | Transport & logistics | 2013 |
| Performance 15 Ltd | Wholesale & retail | 2025 |
| Perrin Instrument Electrical Services Ltd | Professional & scientific | 2016 |
| Peter Bell Farm Cleaning Services Limited | Agriculture & fishing | 2003 |
| PGN Property Investments Ltd | Real estate | 2024 |
| Pilgrim Training and Consultancy Ltd. | Education | 2024 |
| Pima-Bg Ltd | Transport & logistics | 2015 |
| Pimelea Care Services Ltd | Health & social care | 2022 |
| Pizza Licious (Immingham) Limited | Hospitality | 2024 |
| Pizza UNO Limited | Hospitality | 2023 |
| PJF Site Services Ltd | Administrative & support | 2025 |
| PKD Haulage Limited | Transport & logistics | 2018 |
| Placebook Minicabs Limited | Transport & logistics | 2015 |
| PLAM-80 Ltd | Transport & logistics | 2016 |
| PLAM64 Ltd | Transport & logistics | 2018 |
| Platinum Conveyor Services Ltd | Professional & scientific | 2018 |
| Platinum Engineering Solutions Ltd | Professional & scientific | 2025 |
| PM ZAK Transport Ltd | Transport & logistics | 2022 |
| Polskie Haliny UK Ltd | Hospitality | 2020 |
| Premier Books Ltd | Information & communication | 2005 |
| Premier-Bg Ltd | Transport & logistics | 2018 |
| Prestantia Engineering Limited | Professional & scientific | 2025 |
| Problem Solved UK Ltd | Administrative & support | 2023 |
| PSV5 Ltd | Transport & logistics | 2024 |
| Pubs Lincolnshire Ltd | Hospitality | 2024 |