| Orlabella Wellbeing Limited | Health & social care | 2024 |
| Ormerod Taverns Limited | Hospitality | 2015 |
| Ormond Motors Bury Ltd | Wholesale & retail | 2024 |
| Ormond Street Garage Ltd | Other services | 2022 |
| Orozo Ltd | Wholesale & retail | 2024 |
| Orplex Group Limited | Wholesale & retail | 2017 |
| Orplex Limited | Other services | 2014 |
| OSK Service Ltd | Other services | 2017 |
| Oswald & Pablo Limited | Wholesale & retail | 2017 |
| OUR Endeavour CIC | Health & social care | 2023 |
| OUR Magical Kingdom Ltd | Wholesale & retail | 2017 |
| OUT Run Media Limited | Information & communication | 2012 |
| Outlined Nutrition and Aesthetics Ltd | Health & social care | 2025 |
| Outlook Training Ltd | Education | 2023 |
| Outside the Box Investments Ltd | Real estate | 2023 |
| Outwood Electrical Limited | Manufacturing | 2013 |
| Outwood Smart Home Ltd | Manufacturing | 2019 |
| Overbridge Complex Management Limited | Households | 1992 |
| Oversea Finance Company Ltd | Other services | 2016 |
| Ovono Limited | Other services | 2018 |
| Owens Asset Holdings UK Ltd | Real estate | 2026 |
| Oxford Audio Visual Limited | Information & communication | 2016 |
| Oxford Childcare Nursery Ltd | Health & social care | 2024 |
| Oxford Court (Holdings) Ltd | Financial services | 2021 |
| Oxford Court (Properties) Ltd | Financial services | 2018 |
| Oxford Court Investments Limited | Financial services | 2025 |
| Oxford Fission Community Interest Company | Education | 2007 |
| Oxford Visual Arts Festival Limited | Arts & recreation | 1999 |
| Ozil Cuts Limited | Other services | 2026 |
| O’Rourke Creative Ltd | Other services | 2026 |
| P & a Transport (NW) Limited | Transport & logistics | 2012 |
| P & J Property Developments Ltd | Real estate | 2012 |
| P & N Developments Limited | Real estate | 1995 |
| P & W Associates Limited | Professional & scientific | 2025 |
| P 4 Planning Ltd | Professional & scientific | 2013 |
| P D Property NW Ltd | Real estate | 2021 |
| P F & D Limited | Financial services | 2011 |
| P Hilton Engineering Ltd | Professional & scientific | 2018 |
| P J Downs & Associates Limited | Administrative & support | 2016 |
| P P O'Connor Contractors Ltd. | Construction | 1994 |
| P P S Commercials Limited | Manufacturing | 1990 |
| P Plus Limited | Professional & scientific | 2014 |
| P R a Surveys Ltd | Professional & scientific | 2015 |
| P Senior Associates Limited | Professional & scientific | 2007 |
| P&D Homes Ltd | Real estate | 2022 |
| P&H Apparel Ltd | Wholesale & retail | 2017 |
| P&S Healey Property Management Ltd | Real estate | 2025 |
| P. Allen Limited | Construction | 2004 |
| P. J. Carney & Co. Limited | Construction | 1962 |
| P. Johnson Joiner & Builder Limited | Construction | 2003 |
| P. Rainford Solutions Limited | Administrative & support | 2019 |
| P.& M.J.Wright(Holdings)Limited | Financial services | 1933 |
| P.A.N.R Ltd | Construction | 2019 |
| P.A.W. Networks Ltd | Information & communication | 2014 |
| P.D. Fitness Training Ltd | Arts & recreation | 2013 |
| P.J.H. Ceramics (Manchester) Ltd | Construction | 2010 |
| P.L.C. Flats Management Limited | Households | 1971 |
| P1NC Ltd | Administrative & support | 2012 |
| P2 Analysis Limited | Administrative & support | 2015 |
| PA Cricket Centre Ltd | Education | 2025 |
| PA Cricket Indoor Centre Ltd | Arts & recreation | 2023 |
| PA Future Creations CIC | Education | 2025 |
| PA Private Hire Taxi Rental Ltd | Wholesale & retail | 2025 |
| Pabbo Ltd | Health & social care | 2023 |
| Pabbs Ltd | Other services | 2017 |
| PAC Creations Limited | Health & social care | 2014 |
| PAC Global Consulting Limited | Professional & scientific | 2024 |
| PAC Property Investment Limited | Financial services | 2019 |
| Pacdale Limited | Extraterritorial | 2020 |
| PAD, Foot and Paws Ltd | Other services | 2018 |
| Paddock Garage (Ramsbottom) Limited | Wholesale & retail | 2018 |
| Paddock Properties NW Limited | Real estate | 2022 |
| Page Commercial Catering Engineers Limited | Manufacturing | 2014 |
| Page Fire Protection Limited | Public administration | 2003 |
| Pagestoprintuk Ltd | Manufacturing | 2025 |
| PAI Muneeb Travels Ltd | Administrative & support | 2026 |
| Paint TEC & AWR Limited | Wholesale & retail | 2008 |
| PAK GB Properties Ltd | Real estate | 2022 |
| Pakk Ltd | Wholesale & retail | 2023 |
| Palace Properties (NW) Limited | Real estate | 2007 |
| Palani Ltd | Real estate | 2023 |
| Palelock Ltd | Administrative & support | 2019 |
| Pals 2026 Limited | Financial services | 2026 |
| Pamcell Limited | | 1974 |
| Pamper Hamper Ltd | Wholesale & retail | 2025 |
| Panacea Fleet Solutions Ltd | Transport & logistics | 2024 |
| Panacea Motors Ltd | Wholesale & retail | 2015 |
| Panama Communications Limited | Information & communication | 2011 |
| Pandora Chicken Club Ltd | Hospitality | 2024 |
| Pangard Limited | Information & communication | 2018 |
| Panoma Limited | Professional & scientific | 2018 |
| Paper Industry Technical Association | Other services | 2001 |
| Papermarc Recycling Limited | Water & waste | 2001 |
| Papillon Gift Limited | Wholesale & retail | 2013 |
| Papu's Place Limited | Hospitality | 2013 |
| PAR Management Limited | Manufacturing | 2015 |
| Para Siempre Ltd | Wholesale & retail | 2024 |
| Paraden Limited | Real estate | 1986 |
| Paradise Island Holdings Ltd | Real estate | 2019 |
| Paragon House Manchester Limited | Real estate | 2020 |