| OUR Lady and ALL Saints Catholic Multi Academy Company | Education | 2020 |
| OUR Mobile Mechanic Ltd | Wholesale & retail | 2022 |
| OUT & in Limited | Construction | 2020 |
| OUT of This World Travel Ltd | Administrative & support | 2019 |
| Outdoor Designs Solihull Limited | Administrative & support | 2013 |
| Outline Clinic Ltd | Administrative & support | 2015 |
| Outshine Exterior Cleaning Ltd | Administrative & support | 2026 |
| OVA Nails Spa Ltd | Other services | 2026 |
| Ovalside Projects Ltd | Professional & scientific | 2026 |
| Oven Cleaner Near ME Limited | Other services | 2026 |
| Overdue Money for YOU Ltd | Administrative & support | 2025 |
| Overslade Management Company Ltd | Real estate | 2014 |
| Overstone Lakes Caravan Park Ltd | Extraterritorial | 1988 |
| Ownfirst Property Management Limited | Households | 1994 |
| Oxalis Finance Limited | Professional & scientific | 2024 |
| Oxbridge Publishing House Ltd | Information & communication | 2022 |
| Oxford Services Ltd | Professional & scientific | 2024 |
| Oxygenhealth CIC | Arts & recreation | 2025 |
| OZ Consultancy Limited | Health & social care | 2024 |
| OZ Records Limited | Information & communication | 2016 |
| Ozbros Engineering Ltd | Wholesale & retail | 2016 |
| O’Connell Dunn Ltd | Real estate | 2022 |
| P & B Enterprises Ltd | Health & social care | 2013 |
| P & E Berrow Developments Limited | Real estate | 2021 |
| P & E Utilities Limited | Other services | 2020 |
| P & E Ventures Limited | Professional & scientific | 2020 |
| P & G Plumbing and Heating Ltd | Construction | 2018 |
| P & M Walker Brickwork Contractors Limited | Construction | 2009 |
| P & N Holdings Ltd | Financial services | 2024 |
| P & R Builders (Solihull) Limited | Construction | 2004 |
| P & S Locum Limited | Health & social care | 2014 |
| P & V Motors Ltd | Manufacturing | 2009 |
| P C Evans Limited | Construction | 2007 |
| P D S Building Services Ltd | Construction | 2017 |
| P Duckett Consultancy Limited | Professional & scientific | 2020 |
| P Geraghty Properties Ltd | Real estate | 2021 |
| P I Cattell Ltd | Administrative & support | 2015 |
| P I Priestley Finance Limited | Professional & scientific | 2020 |
| P J Collins Accounting Ltd | Professional & scientific | 2019 |
| P J Hill Limited | Construction | 2020 |
| P J Talbott Limited | Other services | 2013 |
| P M Property & Office Rentals Limited | Real estate | 2018 |
| P M PUB Limited | Hospitality | 2019 |
| P Taylor Consultants Ltd | Professional & scientific | 2013 |
| P&S Services Group Ltd | Construction | 2016 |
| P. Foguet Ltd | Health & social care | 2014 |
| P. Jennings Consulting Limited | Information & communication | 2007 |
| P. Nolan & Sons Limited | Construction | 1973 |
| P.J.D. Properties (West Midlands) Limited | Real estate | 2021 |
| P.W.Finance Company Limited | Real estate | 1954 |
| PA Mullen Brickwork Contractors Ltd | Construction | 2018 |
| Pacalina Ltd | Real estate | 2022 |
| Packington Building Services Limited | Real estate | 2015 |
| Packington Gardens Management Limited | Real estate | 2019 |
| Packington Holding Services Ltd | Professional & scientific | 2022 |
| Packington Properties Ltd | Real estate | 2022 |
| Packsealer Midco Ltd | Financial services | 2025 |
| Packwood Court Management Limited | Households | 1997 |
| Packwood Interiors Limited | Construction | 2025 |
| Packwood Leisure Ltd | Hospitality | 2021 |
| Packwood Partners Ltd | Financial services | 2019 |
| Padelheim Ltd | Arts & recreation | 2025 |
| Padmavyuham Ltd | Information & communication | 2013 |
| Padra Investments Limited | Real estate | 2020 |
| Paediatric Neurology Consultancy Limited | Real estate | 2019 |
| Page Aerospace Limited | Manufacturing | 1958 |
| Page Engineering (Holdings) Limited | Professional & scientific | 1977 |
| Pagoda Transformation Consulting Ltd | Information & communication | 2024 |
| Paisley Associates Ltd | Professional & scientific | 2025 |
| Paisley Falcon Ltd | Construction | 2021 |
| Pakchops Limited | Real estate | 2022 |
| Pakpharm Ltd | Wholesale & retail | 2021 |
| Palatial Housekeeping Services Ltd | Administrative & support | 2025 |
| Palette Picture Company Ltd | Information & communication | 2025 |
| Pall UK Holdings Limited | Professional & scientific | 2015 |
| Pallbio Holdings Limited | Financial services | 2020 |
| Palmerston Veterinary Group Limited | Professional & scientific | 2022 |
| Pals-Services Ltd | Administrative & support | 2015 |
| Pammick Care Ltd | Health & social care | 2018 |
| Pams Logistics Limited | Transport & logistics | 2019 |
| PAN & Associates Limited | Professional & scientific | 2008 |
| PAN Consultants Limited | Professional & scientific | 2015 |
| PAN Dynamics Limited | Real estate | 2023 |
| PAN Group Holdings Limited | Financial services | 2022 |
| PAN Property Investment Limited | Real estate | 2021 |
| PAN Shipping Limited | Transport & logistics | 2019 |
| Panacea Design Limited | Extraterritorial | 1999 |
| Panacea Marketing Limited | Professional & scientific | 1991 |
| Panarea Pizza Ltd | Wholesale & retail | 2024 |
| Panash Services Ltd | Administrative & support | 2007 |
| Pancakecart UK Ltd | Hospitality | 2024 |
| Pancakes & Co Desserts Limited | Hospitality | 2025 |
| Panea Property Group Ltd | Real estate | 2025 |
| Panelex Wood Agency Limited | Wholesale & retail | 2019 |
| Panelix Limited | Professional & scientific | 2026 |
| Panelproject Limited | Wholesale & retail | 2024 |
| Panesar Property Group Limited | Real estate | 2025 |
| Panfutures Ltd | Professional & scientific | 2020 |
| Pango Homes Ltd | Real estate | 2021 |
| Panmario (Birmingham) Ltd | Hospitality | 2024 |