| Newnes TW Ltd | Manufacturing | 2024 |
| Nexora Creatives Ltd | Professional & scientific | 2025 |
| Nexrira Store Limited | Wholesale & retail | 2026 |
| NEXT2MOVE Sales & Lettings Ltd | Real estate | 2014 |
| Nicholson North Limited | Financial services | 2022 |
| Nikki's UK Cleaning Ltd | Administrative & support | 2024 |
| NJC Sound Ltd | Manufacturing | 2020 |
| Nmoon 888 Ltd | Hospitality | 2023 |
| Noble's Bingo SR8 Limited | Arts & recreation | 2025 |
| North East Auto Services (Group) Limited | Wholesale & retail | 2025 |
| North East Auto Services Ltd | Wholesale & retail | 2017 |
| North East Autoservices (Chester LE Street) Limited | Wholesale & retail | 2018 |
| North East Autoservices (Gateshead) Limited | Wholesale & retail | 2020 |
| North East Autoservices (Hartlepool) Limited | Wholesale & retail | 2023 |
| North East Autoservices (Lido) Limited | Wholesale & retail | 2025 |
| North East Autoservices (Seaham) Limited | Wholesale & retail | 2024 |
| North East Building Services Limited | Construction | 1999 |
| North East Commercial (Hartlepool) Ltd. | Real estate | 2020 |
| North East Commercial (Sunderland) Limited | Real estate | 2024 |
| North East Commercial Limited | Real estate | 2018 |
| North East Learning Trust | Education | 2011 |
| North East Printing Services Limited | Manufacturing | 2014 |
| North East Property Investment Partners Ltd | Real estate | 2024 |
| North East Smarthomes Management Ltd | Hospitality | 2025 |
| Northeastproud Ltd | Arts & recreation | 2026 |
| Northern Heritage Roofing Ltd | Construction | 2025 |
| Novares Peterlee Limited | Manufacturing | 1995 |
| NOW North East Limited | Arts & recreation | 2015 |
| NOW to WOW Limited | Professional & scientific | 2014 |
| Nurxcel Ltd | Administrative & support | 2019 |
| Nuven Ltd | Wholesale & retail | 2026 |
| NW Road Surfacing Ltd | Construction | 2026 |
| Oak Acquisitions Ltd | Manufacturing | 2025 |
| Oaks & Embers at the Hearts Ltd | Hospitality | 2025 |
| Oakstone Investment Properties Ltd | Real estate | 2025 |
| Obsidian PCS Ltd | Manufacturing | 2026 |
| Oceanic Supply and Services Ltd | Manufacturing | 2025 |
| Oceanwood Properties Ltd | Real estate | 2025 |
| Odin's Hoard Limited | Wholesale & retail | 2025 |
| Olive Garden Italian Restaurant Ltd | Hospitality | 2025 |
| Oneo Foods Limited | Manufacturing | 2017 |
| Open Air Education Foundation CIC | Education | 2017 |
| Optolink Limited | Manufacturing | 1992 |
| Oracle Drive Systems Limited | Professional & scientific | 2003 |
| Orca OBC Ltd | Wholesale & retail | 2023 |
| Otis G Limited | Health & social care | 2025 |
| Overhead Line Team UK Ltd | Construction | 2015 |
| P & P Windows Limited | Manufacturing | 2002 |
| P and L Pipeline Ltd | Construction | 2018 |
| P Atkinson Inspection Limited | Professional & scientific | 2023 |
| P&T Best Private Hire Ltd | Transport & logistics | 2026 |
| P.A.M.(Gb) Limited | Real estate | 2005 |
| P.B.H.Y. Limited | | 2015 |
| PAL Plumbing Ltd | Construction | 2024 |
| Palhaus Ltd | Transport & logistics | 2025 |
| Paramount Care (Easington) Limited | Health & social care | 2015 |
| Paramount Foods International Ltd | Wholesale & retail | 2024 |
| Park Properties Group Limited | Administrative & support | 2019 |
| Park Property Maintenance Limited | Administrative & support | 2019 |
| Pasha Frozen Food Limited | Manufacturing | 2008 |
| PAT Lavery Tyre & Exhaust Centre Limited | Wholesale & retail | 2006 |
| Patina Clothing Co Ltd | Wholesale & retail | 2026 |
| Paulwell-Tindle Limited | Real estate | 2020 |
| Peterlee 15 Limited | Hospitality | 2025 |
| Peterlee Asda Hand Carwash Ltd | Administrative & support | 2025 |
| Peterlee Auto Electrics Ltd | Wholesale & retail | 2012 |
| Peterlee Cafe Ltd | Hospitality | 2015 |
| Peterlee Car Movers Ltd | Transport & logistics | 2024 |
| Peterlee Carwash Ltd | Other services | 2019 |
| Peterlee Decorating Centre Limited | Wholesale & retail | 2020 |
| Peterlee Hartburn Limited | Other services | 2025 |
| Peterlee Property Services Limited | Real estate | 2006 |
| Peterlee Top Nails Limited | Other services | 2021 |
| Peterlee Traffic Services Ltd | Construction | 2017 |
| Peterlee Wind Services Ltd | Manufacturing | 2022 |
| Pets in Paradise Limited | Other services | 2019 |
| Pgfy Holdings Limited | Manufacturing | 2021 |
| PHA Engineering Ltd | Professional & scientific | 2024 |
| Phase 2 Ltd | Health & social care | 2013 |
| Philadelphia Structures Ltd | Manufacturing | 1997 |
| Phoebe & Fern Ltd | Wholesale & retail | 2025 |
| Phoenix Hope Community CIC | Health & social care | 2025 |
| Phoenix Wholesale & Distribution Ltd | Wholesale & retail | 2020 |
| Physiotherapy Solutions & Wellbeing Ltd | Health & social care | 2025 |
| Pixies Tiny Treasures Ltd | Wholesale & retail | 2025 |
| Pizzamania (E.C) Ltd | Hospitality | 2018 |
| Pizzeria Geordie Limited | Hospitality | 2026 |
| Planning House Group Limited | Professional & scientific | 2019 |
| Plump EM UP Aesthetics Ltd | Other services | 2025 |
| Polly&Jam Ltd | Wholesale & retail | 2026 |
| Positively Good for YOU Limited | Manufacturing | 2007 |
| PRB Group Ltd | Administrative & support | 2009 |
| Premier Furniture Repairs Ltd | Other services | 2022 |
| Premier Tech Systems and Automation Limited | Manufacturing | 1983 |
| Premier Tech Water and Environment Limited | Manufacturing | 2008 |
| Premier Tech Water and Environment Solutions Limited | Water & waste | 2007 |
| Premier Tree Services Limited | Agriculture & fishing | 2004 |
| Prime Wholesale Distribution Ltd | Wholesale & retail | 2025 |
| Principal Kitchens and Bathrooms Ltd | Construction | 2006 |
| Private Military Consultancy Ltd | Wholesale & retail | 2024 |