| Old Electricity Station Company Limited | Real estate | 2003 |
| Old MAN Jones Limited | Wholesale & retail | 2021 |
| Old Ornaments Limited | Wholesale & retail | 2026 |
| Olea Repointing & Restoration Ltd | Construction | 2024 |
| Olive-Avocado Ltd | Education | 2021 |
| Oliver Court (Residents) Limited | Households | 1996 |
| Oliver's Mount Racing Ltd | Arts & recreation | 2019 |
| Olivers on the Mount Ltd | Hospitality | 2014 |
| Ollie Pears Racing Limited | Arts & recreation | 2009 |
| Olympus Vehicle Movements Limited | Transport & logistics | 2022 |
| OML Property Consultancy Ltd | Professional & scientific | 2025 |
| Online Digital Data Limited | Information & communication | 2014 |
| Online Homeware Products Limited | Wholesale & retail | 2024 |
| Opal Your Heart Limited | Hospitality | 2024 |
| Open Other END Limited | Arts & recreation | 2011 |
| Operation Granite Stone Limited | Agriculture & fishing | 2013 |
| Operators Locker Ltd | Wholesale & retail | 2023 |
| Opifex Ltd | Information & communication | 2020 |
| Optimum PPS Limited | Professional & scientific | 2011 |
| Orbit Entertainment Ltd | Arts & recreation | 2024 |
| Orbit Global Solutions Limited | Construction | 2005 |
| Orco Estates Ltd | Real estate | 2024 |
| Organic Weigh and Save Limited | Wholesale & retail | 2021 |
| Oriental Spa Ltd | Administrative & support | 2017 |
| Orion Property Renovation Ltd | Real estate | 2023 |
| ORR Developments Limited | Agriculture & fishing | 2012 |
| Osaraj Ltd | Health & social care | 2014 |
| Oscar Babani Limited | Wholesale & retail | 2018 |
| Oscars Function Room Ltd | Administrative & support | 2019 |
| Osla Home Ltd | Wholesale & retail | 2025 |
| Osprey Limited | Manufacturing | 1959 |
| Othick Property Services Limited | Construction | 2014 |
| Otway Joinery Limited | Construction | 2005 |
| Outandin Health Ltd | Wholesale & retail | 2024 |
| Outdoor and Active CIC | Education | 2021 |
| Overnumerousness Ltd | Financial services | 2024 |
| OWC Asset Management Limited | Wholesale & retail | 2002 |
| OWL View Holidays Ltd | Extraterritorial | 2021 |
| Oxlly Ltd. | Administrative & support | 2018 |
| P & C Daley-Smith Ltd | Administrative & support | 2005 |
| P & F S Advisory Limited | Financial services | 2015 |
| P & K Fruit and VEG Limited | Wholesale & retail | 2016 |
| P & L Sound & Lighting (Yorkshire) Limited | Wholesale & retail | 2013 |
| P & M Andrew Ltd | Hospitality | 2022 |
| P & N Smith Coal Merchants Limited | Wholesale & retail | 2003 |
| P & P Properties NY Limited | Real estate | 2019 |
| P a G Leisure Limited | Arts & recreation | 2014 |
| P and S Hobbies and Models Limited | Wholesale & retail | 2014 |
| P Farrow and Sons Limited | Water & waste | 2005 |
| P J Cusworth Builders Ltd | Construction | 2026 |
| P S Construction & Insulation Ltd | Administrative & support | 2025 |
| P Salt Plastering Contractors Limited | Construction | 2014 |
| P Train Limited | Wholesale & retail | 2003 |
| P&B Builders Ltd | Construction | 2006 |
| P.W.A. Management Company Limited | Households | 1992 |
| PA Pest Control Ltd | Administrative & support | 2017 |
| PA Sandhu Properties Limited | Real estate | 2024 |
| PAD 25 Pickering Limited | Households | 2006 |
| Padgham Care Services Limited | Health & social care | 2000 |
| Page E Ltd. | Wholesale & retail | 2016 |
| Paired Apparel Limited | Wholesale & retail | 2024 |
| Pamant Limited | Real estate | 1970 |
| Pampered Paws and Claws Ltd | Other services | 2024 |
| PAN Asian International Trading Ltd | Wholesale & retail | 2026 |
| Panagiotis Zouzoulas Sparta Group Ltd | Manufacturing | 2026 |
| Panda Loco Ltd | Manufacturing | 2019 |
| Pandionidae Limited | Real estate | 2008 |
| Papas Peri Peri Ltd | Extraterritorial | 2019 |
| PAR N Bar Crazy Golf Adventure Ltd | Hospitality | 2022 |
| Parade Studios Ltd | Arts & recreation | 2024 |
| Paradise House Management Company Limited | Households | 2016 |
| Parc D'Activites 1 L.P. | | 2008 |
| Park IT Here Products Limited | Manufacturing | 2006 |
| Parkhead Investments Limited | Financial services | 2017 |
| Parmelia Limited | Hospitality | 2010 |
| Pars Property Limited | Real estate | 2015 |
| Parsco Limited | Hospitality | 2018 |
| Partners in Care Yorkshire Ltd | Health & social care | 2018 |
| Partnerwise Franchise Ltd | Professional & scientific | 2017 |
| Partnerwise Franchise Trustees Limited | Professional & scientific | 2023 |
| Partnerwise Gateway Ltd | Extraterritorial | 2021 |
| Partnerwise Investments Ltd | Financial services | 2017 |
| Partnerwise Ltd | Extraterritorial | 2009 |
| Partnerwise Outsource Ltd | Administrative & support | 2024 |
| Pashby ICC Ltd | Construction | 2022 |
| Pashby Ltd | Real estate | 2025 |
| Pathways of Scarborough Ltd | Construction | 2011 |
| Paul Scott Joinery Limited | Manufacturing | 2005 |
| Pavilion Consultancy Limited | Professional & scientific | 2007 |
| Pavilion Garage Ltd | Wholesale & retail | 2016 |
| Pavilion Sandsend Ltd | Hospitality | 2014 |
| Pavilion View Limited | Households | 2005 |
| Pawfect Stays Home From Home Ltd | Other services | 2024 |
| PAY My Window Cleaner Limited | Administrative & support | 2016 |
| PBR Electrical Limited | Construction | 2008 |
| PBS International Ltd | Manufacturing | 2016 |
| PC Building Contractors Limited | Construction | 2024 |
| PCT Suspension Ltd | Wholesale & retail | 2024 |
| Peace of Mind Financial Solutions Limited | Financial services | 2007 |
| Peaches Properties Scarborough Limited | Real estate | 2024 |