| Moore BFC Limited | Professional & scientific | 2016 |
| Moore Family Management Limited | Financial services | 2016 |
| Moorends Merriments Limited | Hospitality | 2003 |
| MOR Electronics Limited | Wholesale & retail | 2006 |
| Mr.K Construction Yorkshire Ltd | Construction | 2021 |
| MRD Garages Limited | Wholesale & retail | 2012 |
| MSC Creations Ltd | Wholesale & retail | 2018 |
| MT & LB Group Ltd | Construction | 2016 |
| Mulwale Ltd | Professional & scientific | 2022 |
| Musson & Salter Ltd | Construction | 2024 |
| MWJ Engineering Services Ltd | Professional & scientific | 2017 |
| Myatt Private Medical Limited | Health & social care | 2019 |
| Myatt Property Holdings Limited | Real estate | 2025 |
| Mystically Well Limited | Manufacturing | 2025 |
| N & N Land Acquisitions Ltd | Real estate | 2025 |
| N J D Joinery Limited | Construction | 2016 |
| N&C Property Investment Ltd | Real estate | 2025 |
| N, D & N Lettings Ltd | Real estate | 2025 |
| Natizz Limited | Information & communication | 2017 |
| NB Shopfitters Limited | Construction | 2015 |
| Ndwo 2 Limited | Other services | 2026 |
| Ndwo Ltd | Other services | 2022 |
| Neckback Industries Ltd | Wholesale & retail | 2023 |
| Nespro Coffee Limited | Wholesale & retail | 2018 |
| Neurodiversity Tuition Ltd | Information & communication | 2024 |
| New Paradigm Properties Ltd | Real estate | 2017 |
| Newport Buildings LLP | | 2007 |
| Newport Butchers and Bakers Limited | Wholesale & retail | 2003 |
| Newport Crown Ltd | Hospitality | 2016 |
| Nibaz Ltd | Wholesale & retail | 2024 |
| Nick Retallick Limited | Construction | 2008 |
| Nigel Foster Ltd | Arts & recreation | 2001 |
| NKA Consultancy Limited | Construction | 2025 |
| North Cave Hydraulics Limited | Manufacturing | 2021 |
| North East Aggregates Limited | Administrative & support | 2017 |
| North Sky Limited | Construction | 2024 |
| NOS Electrical Services Ltd | Construction | 2019 |
| NRD Music Ltd | Administrative & support | 2020 |
| Nssd Property Limited | Real estate | 2021 |
| O P L Enterprises Ltd | Health & social care | 1994 |
| O'Reilly Professional Services Ltd | Professional & scientific | 2019 |
| Oak Tree Day Nursery Ltd | Education | 2003 |
| OCG Ltd | Wholesale & retail | 2018 |
| Odmp 360 Ltd | Transport & logistics | 2012 |
| OGN Capital Ltd | Financial services | 2025 |
| OK 2 FLY Limited | Administrative & support | 2016 |
| Old Forge (North Cave) Limited | Households | 1994 |
| Olivia Hill Fitted Furniture Limited | Construction | 2020 |
| Only Plans Limited | Real estate | 2023 |
| Orchid Oaks Limited | Manufacturing | 2024 |
| Oscillectric Limited | Manufacturing | 2017 |
| OTL Services Ltd | Construction | 2020 |
| OTT Clothing Ltd | Wholesale & retail | 2025 |
| P a Jessop Limited | Professional & scientific | 2015 |
| P R MAY Farming Limited | Agriculture & fishing | 2002 |
| Pabs Properties Ltd | Real estate | 2024 |
| PAD Group Software Ltd | Extraterritorial | 2013 |
| Paddison Consultancy Limited | Administrative & support | 2020 |
| Page Consulting Limited | Professional & scientific | 2003 |
| Page Training Limited | Education | 2018 |
| Para-Pal Ltd | Financial services | 2022 |
| Paradiso Limited | Hospitality | 1997 |
| Paragon Portfolio Ltd | Real estate | 2021 |
| Paramount Stone Ltd | Construction | 2025 |
| Partners for Profit Accounting Services Limited | Professional & scientific | 2024 |
| Pass Management Systems Ltd | Information & communication | 2015 |
| Paul Baker Autos Ltd | Wholesale & retail | 2021 |
| Paul Bower Holding Ltd | Financial services | 2026 |
| Paul Bower Property Services Ltd | Real estate | 2025 |
| Paul Bower Services Ltd | Construction | 2023 |
| Paul Cairns Osteopathy Limited | Health & social care | 2003 |
| Paul Clark Safety and Construction Services Ltd | Construction | 2026 |
| PCR Specialist Haulage Limited | Transport & logistics | 2014 |
| Peach Homes & Investments Ltd | Real estate | 2024 |
| Pearson Hemingway Limited | Professional & scientific | 2025 |
| People Work Smart (UK) Ltd | Administrative & support | 2025 |
| Petuaria Design Consultancy Service Limited | Professional & scientific | 2007 |
| PGE - Tech Ltd | Manufacturing | 2026 |
| Picturehouse 26 Ltd | Information & communication | 2016 |
| Pieter Smit Holding UK Ltd | Financial services | 2026 |
| Piglet Property (Hull) Limited | Real estate | 2023 |
| Pinx Display Ltd | Manufacturing | 2018 |
| PJ & WT Ltd | Professional & scientific | 2025 |
| PJC Health & Safety Management Ltd | Professional & scientific | 2025 |
| PKA Consultancy Ltd | Professional & scientific | 2025 |
| Plan Architecture Limited | Professional & scientific | 2022 |
| Planet Cash Loans Limited | Financial services | 2002 |
| Plumbair Services Ltd | Construction | 2015 |
| PMG Media Limited | Information & communication | 2011 |
| PNX Property Ltd | Administrative & support | 2024 |
| Pocketrocket Motos Ltd | Wholesale & retail | 2019 |
| Point Engineering (UK) Limited | Manufacturing | 1999 |
| Pointgale Ltd | Construction | 2012 |
| Pool Developments Hull Ltd | Construction | 2020 |
| Portdale Group Ltd | Real estate | 2025 |
| Power Fire & Security Ltd | Construction | 2019 |
| PRB Logistix Limited | Transport & logistics | 2016 |
| Premier Specialist Cleaning Ltd | Administrative & support | 2023 |
| Pricemoto Ltd | Wholesale & retail | 2017 |
| Primary Property Solutions Limited | Real estate | 2023 |