| Nicholls Real Estate Limited | Real estate | 2026 |
| Nicks East Coast Cleaning Services Ltd | Administrative & support | 2025 |
| Nicola Amidulla Mortgages Limited | Financial services | 2015 |
| Niksh (UK) Ltd | Hospitality | 2015 |
| NJG Transport Services Limited | Transport & logistics | 2017 |
| NL01 Ltd | Information & communication | 2026 |
| NLT Holdings Limited | Financial services | 2024 |
| NMS Paving and Groundworks Ltd | Construction | 2019 |
| Noddy's Driving Agency Limited | Transport & logistics | 2003 |
| North Bay (Anlaby) Ltd | Administrative & support | 2022 |
| North Bay (Beechwood Care Home) Ltd | Administrative & support | 2024 |
| North Bay (Beechwood) Limited | Construction | 2013 |
| North Bay (Cheadle) Ltd | Administrative & support | 2023 |
| North Bay (County Durham 2026) Ltd | Construction | 2026 |
| North Bay (County Durham) Ltd | Construction | 2021 |
| North Bay (Derbyshire) Ltd | Administrative & support | 2026 |
| North Bay (Lancs) Ltd | Administrative & support | 2024 |
| North Bay (Liberty) Ltd | Administrative & support | 2023 |
| North Bay (Middleton NO 1) Ltd | Administrative & support | 2025 |
| North Bay (Middleton NO2) Ltd | Administrative & support | 2025 |
| North Bay (North Midlands) Ltd | Administrative & support | 2025 |
| North Bay (Northallerton) Ltd | Construction | 2025 |
| North Bay (ST John) Ltd | Administrative & support | 2023 |
| North Bay (West Yorkshire) Ltd | Construction | 2025 |
| North Bay (Willow) Ltd | Administrative & support | 2025 |
| North Bay (Wirral) Ltd | Construction | 2025 |
| North Bay Care Services Ltd | Administrative & support | 2024 |
| North Bay Developments Ltd | Real estate | 2019 |
| North Bay Engineering Ltd | Construction | 2025 |
| North Bay Group Ltd | Health & social care | 2021 |
| North Bay Holdings Ltd | Health & social care | 2017 |
| North Bay Leisure Limited | Hospitality | 2004 |
| North Bay Management Company Limited | Households | 2001 |
| North Bay Services Ltd | Administrative & support | 2017 |
| North Beach Fish and Chips Limited | Hospitality | 2014 |
| North Cotes Farm,Limited | Agriculture & fishing | 1944 |
| North East Leasing Limited | Real estate | 2025 |
| North Lakes Limited | Hospitality | 2017 |
| North Landing Ltd | Information & communication | 2026 |
| North Offshore Services Ltd | Mining & quarrying | 2024 |
| North Prestige Ltd | Wholesale & retail | 2024 |
| North Shore SAP Ltd | Information & communication | 2025 |
| Northclif Limited | Hospitality | 2020 |
| Northern House Properties Limited | Real estate | 1959 |
| Northern Visuals (Media) Limited | Information & communication | 2023 |
| Northman Stone Ltd | Manufacturing | 2023 |
| NT Tuition Ltd | Education | 2024 |
| Nutringredients Limited | Agriculture & fishing | 2003 |
| O D 82 Limited | Other services | 2013 |
| O'Loughlins Yorkshire Ltd | Hospitality | 2026 |
| O.P. Shellfish Limited | Agriculture & fishing | 2013 |
| Oakdoor Property Ltd | Construction | 2026 |
| Oakgold Estates Limited | Construction | 1998 |
| Oakhouse Holiday Lets Ltd | Hospitality | 2025 |
| Oakmont Parks Limited | Hospitality | 2023 |
| OAP Motoring Solutions Ltd | Wholesale & retail | 2024 |
| Oasis Technology Ltd | Information & communication | 2008 |
| Ocean View Apartments Ltd | Hospitality | 2020 |
| Oceansafe Windows Scarborough Limited | Construction | 2003 |
| ODD Four Fishing Ltd | Agriculture & fishing | 2020 |
| ODD Sock Productions Ltd | Information & communication | 2024 |
| Officetec (UK) Ltd | Wholesale & retail | 2006 |
| Oilfield Services TS Limited | Professional & scientific | 2014 |
| Olbeth Property Limited | Real estate | 2024 |
| Oliver Bros (Farming) Limited | Agriculture & fishing | 2015 |
| Ombler Investments Ltd | Real estate | 2024 |
| ON Point Roofing Ltd | Construction | 2023 |
| ON the Oche Darts Limited | Wholesale & retail | 2025 |
| ON the Wall Ltd | Construction | 2026 |
| One Point Zero Limited | Information & communication | 2015 |
| Onward Star Limited | Agriculture & fishing | 2010 |
| Opal Aesthetics Limited | Manufacturing | 2013 |
| Optimum Controls Limited | Professional & scientific | 2005 |
| Orbit Developments Yorkshire Limited | Construction | 2020 |
| OSMAN98 Ltd | Hospitality | 2024 |
| Ottie and Co Limited | Real estate | 2016 |
| OUR Little Sicily Ltd | Hospitality | 2018 |
| Overview Roofing Ltd | Construction | 2026 |
| Oyston Auto.Com Ltd | Wholesale & retail | 2019 |
| Ozis Properties Ltd | Real estate | 2025 |
| P a Spink & Sons Ltd | Construction | 2014 |
| P D R Renovations Ltd | Construction | 2012 |
| P&T 2025 Ltd | Hospitality | 2026 |
| P. F. C. Construction Ltd | Construction | 2005 |
| P.M.Parr Property Solutions Limited | Households | 2025 |
| Pace Cycles Limited | Manufacturing | 1989 |
| Pallant Properties Limited | Real estate | 2017 |
| Pandora Self Storage Limited | Real estate | 2017 |
| Paradise Farmers Limited | Agriculture & fishing | 2016 |
| Park Development Consultancy Limited | Professional & scientific | 2021 |
| Park Farm Poultry Ltd | Agriculture & fishing | 2023 |
| Park-Tech Group Limited | Construction | 2026 |
| Pastimes (Hornsea) Limited | Real estate | 1965 |
| Pasture Properties Limited | Real estate | 2025 |
| Patrick Giles Property Ltd | Real estate | 2025 |
| Paul Stubbs Motor Services Limited | Wholesale & retail | 2012 |
| Paul Talkington Music Services Limited | Information & communication | 2006 |
| Paull Boatyard and Marine Services Limited | Manufacturing | 2020 |
| Paxlibertas Limited | Construction | 2011 |
| Pdrg Ltd | Manufacturing | 2026 |