| Neon Stays Limited | Real estate | 2024 |
| Nest-Tec (Holdings) Limited | Financial services | 2020 |
| Netdale Limited | Manufacturing | 2003 |
| Newell's of Brigg Limited | Wholesale & retail | 2005 |
| Newton Blading Services Limited | Professional & scientific | 2017 |
| Next Generation Hire Ltd | Transport & logistics | 2017 |
| Next Generation Transport Ltd | Transport & logistics | 2017 |
| NGY Construction Ltd | Real estate | 2018 |
| NGY Property Limited | Real estate | 2020 |
| Nicola Morris Mortgage Advisor Ltd | Financial services | 2022 |
| NJW Bricks Limited | Wholesale & retail | 2023 |
| NMD Creative Limited | Manufacturing | 2010 |
| Noahs’S Land Limited | Administrative & support | 2022 |
| Noominds Ltd | Wholesale & retail | 2022 |
| North Lincolnshire Classic Motorcycle Club | Arts & recreation | 2004 |
| North Lincolnshire Property Services Limited | Real estate | 1997 |
| Northfield Agricultural Services Limited | Extraterritorial | 1976 |
| Nutricor Agronomics Limited | Agriculture & fishing | 2020 |
| Nutricor Holdings Ltd | Agriculture & fishing | 2020 |
| Oak Medical Services Limited | Manufacturing | 1990 |
| Oceans Edge Ltd | Professional & scientific | 2017 |
| Oland Port Solutions Ltd | Professional & scientific | 2021 |
| Old School Films Ltd | Arts & recreation | 2023 |
| Olypsys Technologies Ltd | Manufacturing | 2019 |
| ON Point Spraying Solutions Limited | Wholesale & retail | 2023 |
| Onlyvans Lincolnshire Ltd | Wholesale & retail | 2025 |
| Oxley & Sons Interiors Ltd | Construction | 2018 |
| Oxley and Sons Interiors Joinery and Fireproofing Limited | Construction | 2024 |
| P & L O'Reilly Limited | Real estate | 2003 |
| P Bryan Electrical Limited | Manufacturing | 2011 |
| P N Dobson Ltd | Construction | 2006 |
| P6 Scheduling Ltd | Professional & scientific | 2025 |
| PAD Productions Limited | Arts & recreation | 2015 |
| Paramount Elements Limited | Manufacturing | 2010 |
| Pastures New Properties Limited | Real estate | 2018 |
| Patina and Performance Limited | Wholesale & retail | 2023 |
| Paul Drury Mechanical Engineering Services Ltd | Wholesale & retail | 2022 |
| PBI Consulting Ltd. | Information & communication | 2017 |
| PDC Racing C.I.C. | Education | 2020 |
| Peacock & Binnington Holdings Limited | Professional & scientific | 1990 |
| Peacock & Binnington Limited | Wholesale & retail | 1937 |
| Peacock Agri Limited | Wholesale & retail | 2022 |
| Peasemore UK Limited | Real estate | 2025 |
| Pepperwood Holdings Limited | Financial services | 2026 |
| Pexian Limited | Arts & recreation | 2014 |
| Phil Presswood Specialist Cars Ltd | Wholesale & retail | 2017 |
| Phillips Motorcycle Services Ltd | Wholesale & retail | 2026 |
| Phoenix Fire Testing & Certification Ltd | Professional & scientific | 2024 |
| Phoenix Plant Hire UK Limited | Administrative & support | 2005 |
| Pilett Properties Ltd | Real estate | 2021 |
| Pippa PIG Ltd | Hospitality | 2025 |
| Pitbull Security Ltd | Administrative & support | 2025 |
| Plant Reliability Solutions Ltd | Professional & scientific | 2016 |
| Platinum Project Management Ltd | Professional & scientific | 2016 |
| Play Avenue Ltd | Arts & recreation | 2019 |
| PLT Medical Services Limited | Health & social care | 2011 |
| Plutus Ltd | Real estate | 2003 |
| PMC Plastics Machinery Components Limited | Professional & scientific | 2024 |
| PMK Healthcare Limited | Professional & scientific | 2016 |
| PMT Property Investments Ltd | Real estate | 2024 |
| Pokeveev Ltd | Wholesale & retail | 2026 |
| Pomona Lettings Ltd | Real estate | 2025 |
| Portess and SON Limited | Construction | 2024 |
| Power Engineers Limited | Professional & scientific | 2006 |
| Precision Diag Limited | Health & social care | 2023 |
| Price Motor Repairs Ltd | Wholesale & retail | 2024 |
| Proampac Elsham Public Limited Company | Manufacturing | 1988 |
| PTL Construction Ltd | Financial services | 2018 |
| PTL Construction Training Academy Limited | Other services | 2019 |
| PTL Developments Limited | Real estate | 2017 |
| PTL Sheq Consultants Limited | Professional & scientific | 2017 |
| Quantum Business Services (UK) Limited | Professional & scientific | 2003 |
| R & E Aggregates Ltd | Administrative & support | 2013 |
| R J Mundey Butcher's & Bakers Ltd | Wholesale & retail | 2024 |
| R M Dunwell Limited | Information & communication | 2018 |
| R P Carolan Property Limited | Real estate | 2013 |
| R.J. & A.E. Godfrey, | Agriculture & fishing | 1950 |
| R.M. Maritime Limited | Transport & logistics | 1977 |
| Racing Radiator Guards Ltd | Professional & scientific | 2018 |
| Ramskill Group Ltd | Financial services | 2023 |
| Ramskill Homes Ltd | Real estate | 2022 |
| Raymee Limited | Wholesale & retail | 2026 |
| Rbha Ltd | Wholesale & retail | 2024 |
| Real Green Clean Ltd | Administrative & support | 2018 |
| Red Hand Holdings Limited | Professional & scientific | 2024 |
| Redwood Services (Lincs) Limited | Manufacturing | 2010 |
| Regeneros Ltd | Professional & scientific | 2020 |
| RET Solutions Limited | Professional & scientific | 2023 |
| RFH Engineering Limited | Professional & scientific | 2013 |
| RIB D.S.C. Limited | Administrative & support | 2001 |
| Riby Family Ltd | Other services | 2023 |
| Richard Mark Flooring Ltd | Construction | 2006 |
| Richard Newell Plumbing & Heating Limited | Construction | 2012 |
| Richardson Automotive Ltd | Wholesale & retail | 2018 |
| Ricodent Management Limited | Health & social care | 2022 |
| Rift CL Ltd | Real estate | 2018 |
| Rimar Civil Engineering Ltd | Construction | 2019 |
| RKS Groundworks Sole Trader Ltd | Construction | 2023 |
| RM Maritime (Brigg) Limited | Transport & logistics | 2025 |
| RNS Financial Services Limited | Administrative & support | 2000 |