| MW Electrical & Property Maintenance Limited | Construction | 2023 |
| MW Property Lettings Limited | Real estate | 2023 |
| MWA Commercials Limited | Wholesale & retail | 2021 |
| My Eyes Wide Productions Ltd | Information & communication | 2024 |
| My Garage Grimsby Ltd | Wholesale & retail | 2026 |
| My Talent JOB Ltd | Professional & scientific | 2023 |
| My Time Ltd | Information & communication | 2023 |
| MYS General Trading Ltd | Hospitality | 2024 |
| N & G Medicolegal Reporting Limited | Health & social care | 2008 |
| N Bovill Decorators Limited | Other services | 2008 |
| N Garton Limited | Construction | 2022 |
| Nasturtium Catering Ltd | Hospitality | 2026 |
| NBE Builders Ltd | Construction | 2025 |
| NBE Holdings Limited | Administrative & support | 2025 |
| NBE Properties Limited | Real estate | 2025 |
| NDH Brothers Ltd | Wholesale & retail | 2023 |
| NE Docs Ltd | Other services | 2026 |
| NE Lincs Homes Ltd | Real estate | 2020 |
| Nedar Ltd | Administrative & support | 2024 |
| NEL Therapy Services CIC | Health & social care | 2025 |
| Nelly's Cafe Ltd | Hospitality | 2022 |
| Neroline Limited | Construction | 2007 |
| Netley Hotel Ltd | Hospitality | 2026 |
| Nevis International Limited | Transport & logistics | 2015 |
| Nevtec Ltd | Construction | 2018 |
| New Cleethorpes Constitutional Club Limited | Hospitality | 1910 |
| New ERA Martial Arts Academy Ltd | Arts & recreation | 2025 |
| New Star Burger Ltd | Hospitality | 2021 |
| New Waltham Tandoori Ltd | Hospitality | 2024 |
| Newman Properties Limited | Construction | 1982 |
| NG Inspections Ltd | Professional & scientific | 2025 |
| NHB PUB Company Limited | Hospitality | 2014 |
| Nick Smith Civils Limited | Construction | 2020 |
| Nigel Ellis Fish Sales Limited | Wholesale & retail | 2008 |
| Noirax Research Group Ltd | Wholesale & retail | 2026 |
| Noize Boyz Limited | Arts & recreation | 2008 |
| Norf Group Ltd | Arts & recreation | 2026 |
| Norfolk Lane Cold Stores Ltd | Administrative & support | 2017 |
| Norfolk Optics (UK) Limited | Health & social care | 2012 |
| Norfolk Optics Brigg Ltd | Health & social care | 2017 |
| North East Training Services Ltd | Education | 2023 |
| Northern Style Ltd | Real estate | 2023 |
| Northfield Property Projects Ltd | Construction | 2026 |
| Nottingham Pallet Racking Ltd | Construction | 2019 |
| NPI78 Ltd | Transport & logistics | 2020 |
| NPJ Media Limited | Information & communication | 2026 |
| NSR RF Services Limited | Information & communication | 2026 |
| NT Fire Ltd | Other services | 2019 |
| Ntare Optometry Services Ltd | Health & social care | 2019 |
| Nufisilas Ltd | Professional & scientific | 2022 |
| Nufs Kitchen Ltd | Hospitality | 2019 |
| Nunsthorpe Trading Limited | Hospitality | 2020 |
| Nurture Nature Forest School CIC | Education | 2022 |
| Nuts and Bolts Technician Limited | Manufacturing | 2023 |
| O&D Waste Removal Limited | Water & waste | 2024 |
| Oakwood Properties (Lincs) Limited | Real estate | 2025 |
| Ocean Fish Bar Holdings Limited | Financial services | 2026 |
| Offbeat Studios Ltd | Information & communication | 2025 |
| OG Inspection Ltd | Agriculture & fishing | 2024 |
| Old Barns Management Company Limited | Households | 2022 |
| Old Post Sports Bar Ltd | Hospitality | 2024 |
| Oliver Kirton Offshore Operations Limited | Construction | 2024 |
| Oliver's Automotive Solutions Ltd | Wholesale & retail | 2026 |
| Omsivaya Ltd | Wholesale & retail | 2025 |
| One Stop Safety Limited | Public administration | 2021 |
| Onestop Bathrooms Limited | Wholesale & retail | 2014 |
| Oniro Signs & Graphics Limited | Professional & scientific | 2020 |
| Open House for Everyone Ltd | Health & social care | 2025 |
| Orgnc Ltd | Wholesale & retail | 2025 |
| Original Taste Ltd | Wholesale & retail | 2019 |
| Oscar Owen Lettings Limited | Real estate | 2018 |
| Otisandbean Ltd | Wholesale & retail | 2023 |
| Owen Cherrell Racing Limited | Wholesale & retail | 2005 |
| P & at Engineering Limited | Professional & scientific | 2023 |
| P & P Plumbing and Heating Installations Limited | Construction | 2019 |
| P F Vision Panels Limited | Manufacturing | 2009 |
| P Gibbo Freelance Ltd | Transport & logistics | 2016 |
| P H Decorating Contractors Limited | Administrative & support | 2003 |
| P Tech Systems Limited | Other services | 2018 |
| Packing Machinery Limited | Administrative & support | 2026 |
| Paddington Services Ltd | Other services | 2017 |
| Palmer Technology Limited | Other services | 1991 |
| Papito Mexican Kitchen Ltd | Hospitality | 2025 |
| Pappanos Limited | Hospitality | 2024 |
| Paris Clothing Limited | Wholesale & retail | 2007 |
| Parkington Catering Limited | Hospitality | 2025 |
| Pattons GPH Limited | Construction | 2025 |
| Paul Brewster Plumbing & Heating Limited | Construction | 2019 |
| Paul Hewitt Limited | Wholesale & retail | 2002 |
| Paul Leyland Fish Sales Limited | Wholesale & retail | 2002 |
| Paul Surfleet Plumbing, Heating and Joinery Ltd | Construction | 2017 |
| Paul's Fish (GY) Limited | Wholesale & retail | 2003 |
| PAW Thai Lincs Ltd | Hospitality | 2013 |
| Payroll Payment Limited | Extraterritorial | 2017 |
| PDR Transport Limited | Transport & logistics | 2010 |
| Peachy and Zesty Limited | Manufacturing | 2025 |
| Pegasus Access Solutions Ltd | Construction | 2025 |
| Penny's News Limited | Wholesale & retail | 2008 |
| Perform Fabrication Services Limited | Professional & scientific | 2025 |
| Performance LAB Hull Limited | Arts & recreation | 2026 |