| NI PUB Company Ltd | Hospitality | 2023 |
| Nicholas Balmer Design & Associates Ltd | Arts & recreation | 2026 |
| Nicholson Development Ltd | Real estate | 2024 |
| Nicholson Trade Windows Ltd | Other services | 2020 |
| Nick Tattersall Financial Planning Ltd | Financial services | 2020 |
| Nicky Lavin Specialist Practitioner Occupational Health Ltd | Health & social care | 2011 |
| Nicola Beverley Consultancy Ltd | Education | 2012 |
| Nicole Olivia Cake Designs Ltd | Wholesale & retail | 2024 |
| Nicotra Gebhardt Ltd. | Wholesale & retail | 1958 |
| Nigel Allen Plumbers Ltd | Construction | 2010 |
| Nigel Qualter Plumbing & Heating Limited | Construction | 2015 |
| Nigel Swift Developments Limited | Construction | 1987 |
| NJA Building Ltd | Construction | 2025 |
| NJA Farms Limited | Agriculture & fishing | 2007 |
| NJH Laser Limited | Health & social care | 2025 |
| NLD Pets Ltd | Agriculture & fishing | 2022 |
| NNJ Investment Ltd | Professional & scientific | 2023 |
| NO Limit Conversions Ltd | Other services | 2020 |
| NO:18 Property Management Limited | Real estate | 2023 |
| Noble & Co. Properties Limited | Real estate | 2025 |
| Noble Construction & Consultancy Ltd | Construction | 2025 |
| Nolan Electrical Labour Ltd | Construction | 2013 |
| Nomad Micro Trailers Ltd | Manufacturing | 2025 |
| Nook and Beam Ltd | Manufacturing | 2026 |
| North Gulham Limited | Other services | 2014 |
| North Gulham Lodges Limited | Households | 2021 |
| North Point UK Limited | Manufacturing | 2002 |
| Northern Lights Promotions (York) Limited | Hospitality | 2023 |
| Northfield Care Centre (Thorne) Ltd | Health & social care | 2016 |
| Noseuk Limited | Wholesale & retail | 2025 |
| Nottinghamshire PTC Limited | Education | 2012 |
| NPB Motors Limited | Wholesale & retail | 2023 |
| Nurture Hub Day Nursery Horncastle Ltd | Health & social care | 2023 |
| Nuttall Electrical Services Limited | Construction | 2021 |
| O'Hara Wills & Estate Planning Ltd | Other services | 2023 |
| O3 Nova Limited | Administrative & support | 2026 |
| Oatz & Co Ltd | Manufacturing | 2025 |
| OCD Autocare Limited | Wholesale & retail | 2026 |
| Odytahealth Ltd | Health & social care | 2023 |
| Offer Consultancy Ltd | Professional & scientific | 2025 |
| Old HK Limited | Manufacturing | 1999 |
| OLU Enterprises Ltd | Health & social care | 2017 |
| Olymdo Limited | Wholesale & retail | 2019 |
| ON the Move Sports Coaching Ltd | Arts & recreation | 2023 |
| ON Track Bricklaying Ltd | Construction | 2025 |
| One World One Life Ltd | Administrative & support | 2007 |
| Oneiric Limited | Wholesale & retail | 2022 |
| Onit Technologies Ltd | Information & communication | 2017 |
| Online Business Tuition Limited | Education | 2024 |
| Open Door by Everett’S Ltd | Households | 2025 |
| Oswald Retail Limited | Wholesale & retail | 2002 |
| Otters Beauty Bar Ltd | Other services | 2022 |
| Otters Custom Exports Ltd | Wholesale & retail | 2023 |
| OUR Essence Ltd | Education | 2025 |
| Outdoor Wild Learning Skills (Laughton) Ltd | Education | 2023 |
| Owen Improvements Ltd | Construction | 2026 |
| Ozziefields Limited | Agriculture & fishing | 2014 |
| P B Powder Coatings Ltd | Wholesale & retail | 2018 |
| P Bailey Services 75 Ltd | Transport & logistics | 2012 |
| P G Alloys Limited | Wholesale & retail | 2023 |
| P J and R P Holdings Ltd | Real estate | 2024 |
| P R C Fishing Ltd | Agriculture & fishing | 2012 |
| P.O. Auto's Limited | Other services | 2021 |
| Packaging Solutions Global Limited | Professional & scientific | 2015 |
| Page Planning Services Ltd | Professional & scientific | 2024 |
| Paige Alexandra Bagley Ltd | Transport & logistics | 2024 |
| Palmer Development Group Ltd | Construction | 2025 |
| Palmer Holding Group Ltd | Financial services | 2025 |
| Panda Property Bros Ltd | Real estate | 2026 |
| Pangea Recruitment Ltd | Administrative & support | 2012 |
| Papa Redz Ltd | Hospitality | 2025 |
| Papallona Ltd | Professional & scientific | 2016 |
| Paradyme Developments Ltd | Real estate | 2020 |
| Paramount Roofline Specialists Ltd | Construction | 2014 |
| Paramount Scaffold Ltd | Extraterritorial | 2022 |
| Parasol Services Ltd | Professional & scientific | 2024 |
| Parish Cleaning and Supplies Ltd | Administrative & support | 2025 |
| Park House Works Limited | Wholesale & retail | 2014 |
| Parkacre Holdings Limited | Administrative & support | 2012 |
| Parkacre Limited | Manufacturing | 2005 |
| Parkhouse Enterprises Ltd. | Construction | 2002 |
| Parkit Management Limited | Manufacturing | 2012 |
| Parkside Garage Services Ltd | Wholesale & retail | 2021 |
| Parr Contracting Limited | Agriculture & fishing | 2015 |
| Party on the Go Limited | Wholesale & retail | 2017 |
| PAT Test UK Limited | Wholesale & retail | 2001 |
| Paul Brownless Flooring Specialist Ltd | Other services | 2013 |
| Paul Campion Limited | Construction | 2012 |
| Paul Harper Consulting Ltd | Professional & scientific | 2016 |
| PB02 Properties Limited | Real estate | 2023 |
| PC Paradise Ltd | Wholesale & retail | 2023 |
| PCC Developments Ltd | Construction | 2023 |
| PD Education Limited | Education | 2023 |
| PD Services (Lincs ) Ltd | Construction | 2012 |
| PDH Housing Ltd | Manufacturing | 2023 |
| PDN Granite Imports Ltd | Manufacturing | 2026 |
| PDW Precision Engineering Limited | Manufacturing | 2001 |
| Peak Corporate Services Ltd | Other services | 2020 |
| Peakstone Home Improvements Ltd | Construction | 2026 |
| Peniston Financial Ltd | Financial services | 2022 |