| Novastar Link Limited | Manufacturing | 2008 |
| Nurture ME Day Nursery Ltd | Education | 2019 |
| Nutkins Nursery Limited | Education | 2008 |
| Nuvaros IP Limited | Professional & scientific | 2016 |
| Oakmere Day Nursery Ltd | Education | 2025 |
| OE Enterprises Limited | Wholesale & retail | 2016 |
| OE Properties Limited | Real estate | 2020 |
| Oemm Group Limited | Financial services | 2023 |
| Old Dog New Techs Limited | Information & communication | 2018 |
| Olim Data Limited | Information & communication | 2025 |
| Omikron Data Limited | Information & communication | 2008 |
| Omnisolar Limited | Manufacturing | 2024 |
| Onanda Industries Ltd | Professional & scientific | 2019 |
| Oneweekdrivingcourse.Co.Uk Ltd | Other services | 2013 |
| Onyx Bullion Ltd | Manufacturing | 2018 |
| Onyx Freelance Ltd | Administrative & support | 2019 |
| Onyx Premium Beauty Ltd | Other services | 2019 |
| Opas Investments Limited | Financial services | 2022 |
| Open Nest Solutions Ltd | Information & communication | 2025 |
| Optime Business Services Ltd | Professional & scientific | 2011 |
| Oscar Henry Developments Ltd | Real estate | 2021 |
| Otsit Ltd | Information & communication | 2012 |
| Otus Transport Planning Ltd | Other services | 2026 |
| Oughtrington Community Centre | Other services | 2005 |
| Oughtrington Properties Limited | Construction | 2023 |
| Oxore Ltd | Real estate | 2025 |
| P C G Associates Limited | Professional & scientific | 2005 |
| Paas Genesis Limited | Administrative & support | 2021 |
| Packfill Limited | Administrative & support | 2023 |
| Pagayer Ltd | Extraterritorial | 2024 |
| Parcel in the Attic Ltd. | Wholesale & retail | 2014 |
| Parkwood Solutions Limited | Construction | 2024 |
| Partington Hub Ltd | Other services | 2024 |
| Patterdale Lodge Day Nursery Limited | Health & social care | 2015 |
| Paul Bains Flooring Solutions Limited | Construction | 2008 |
| Paul Potter Kitchens Ltd | Construction | 2024 |
| PCG Design Solutions Limited | Other services | 2017 |
| Pecunia EST REX Ltd | Professional & scientific | 2012 |
| Peepo Day Nursery (Solihull) Ltd | Education | 2013 |
| Peepo Day Nursery Ltd | Education | 2008 |
| Pegasuslink Limited | Real estate | 1993 |
| Penny Hill Consulting Ltd | Information & communication | 2019 |
| Pentagon Investment Management Limited | Real estate | 2013 |
| Perfect Conversions Ltd | Construction | 2016 |
| Perfect Living Group Ltd | Real estate | 2017 |
| Perfect Pink EYE Ltd | Real estate | 2018 |
| Perfect Start Day Nurseries Limited | Education | 2016 |
| Performance Race Coaching Limited | Wholesale & retail | 2008 |
| Peter Clough Property Limited | Real estate | 2018 |
| PGM Consultants Limited | Information & communication | 2023 |
| Philip Dunbavin Acoustics Limited | Professional & scientific | 1988 |
| Philip Griffiths Excise Associates Limited | Professional & scientific | 2014 |
| Pilates With Leila Limited | Health & social care | 2025 |
| Pine Trees (Cheshire) Ltd | Health & social care | 2018 |
| Pink Pomegranate Limited | Real estate | 2017 |
| Piste View Limited | Information & communication | 2014 |
| Pitchpole Ltd | Information & communication | 2011 |
| Pizza Pitt Ltd | Hospitality | 2023 |
| PJB Programme Management Ltd | Professional & scientific | 2019 |
| PJD Holdings Ltd | Administrative & support | 2025 |
| PJO Enterprises Limited | Wholesale & retail | 2013 |
| Plan Thirteen B Limited | Information & communication | 2007 |
| Plasmalift Pro Ltd | Wholesale & retail | 2026 |
| Play Away Childrens Nursery Limited | Education | 2005 |
| PLUMBER4U Ltd | Construction | 2026 |
| Point of Sale Networks Limited | Wholesale & retail | 2018 |
| Poppins Day Nursery Limited | Education | 2008 |
| Poppy & Jacks Nurseries Limited | Education | 2002 |
| Poppy&Jacks Limited | Education | 2009 |
| POS Cleaning Supplies Ltd | Wholesale & retail | 2016 |
| POS Networks Limited | Information & communication | 2025 |
| Posiet Limited | Professional & scientific | 2003 |
| Positive Approaches Ltd | Education | 2019 |
| Powertheme Limited | Transport & logistics | 1991 |
| Powerup Manchester Ltd | Construction | 2016 |
| PPT Consultancy Limited | Financial services | 2012 |
| PR Bircham Limited | Professional & scientific | 2023 |
| PR Optical Ltd | Wholesale & retail | 2024 |
| Premier Events Limited | Other services | 1986 |
| Premier Pensions and Tax Consultancy Limited | Financial services | 2008 |
| Prendere Ltd | Real estate | 2021 |
| Prestige Time Services Limited | Professional & scientific | 2008 |
| Primecoach Limited | Professional & scientific | 2023 |
| Procurement & Negotiation Services Limited | Professional & scientific | 2017 |
| Prodigious Talent Limited | Professional & scientific | 2012 |
| Professional Pest Services Limited | Other services | 2011 |
| Progressive Personnel Limited | Administrative & support | 2005 |
| Project PT Bidco Limited | Health & social care | 2017 |
| Project PT Topco Limited | Health & social care | 2017 |
| Projectal Limited | Professional & scientific | 2012 |
| Propertysign Limited | Professional & scientific | 1999 |
| PS Accountants Ltd | Professional & scientific | 2013 |
| PS Innovative Heating Solutions Ltd | Professional & scientific | 2012 |
| Puddleducks Daycare Nursery Limited | Health & social care | 2009 |
| Pulse (Camden) Ltd | Arts & recreation | 2026 |
| Pulse (Deptford) Ltd | Arts & recreation | 2025 |
| Pulse (Putney) Ltd | Arts & recreation | 2025 |
| Pure Filters (International) Limited | Manufacturing | 2008 |
| Purer Power Limited | Energy | 2013 |
| Purewave Energy Ltd | Energy | 2025 |