| PNA76 Limited | Real estate | 2024 |
| Pokeportsmouth Ltd | Wholesale & retail | 2025 |
| Pola Pictures Ltd | Arts & recreation | 2011 |
| Polaris Search and Consultancy Limited | Administrative & support | 2025 |
| Popcorning Piggies Guinea PIG Rescue CIC | Agriculture & fishing | 2025 |
| Poppy’S Retail Limited | Hospitality | 2026 |
| Portal to the Paranormal Ltd | Arts & recreation | 2021 |
| Portlight Training & Consultancy Ltd | Professional & scientific | 2015 |
| Portsdown Hill Properties Limited | Real estate | 2020 |
| Portsmouth Harbour Marine CIC | Other services | 2013 |
| Portsmouth Offshore Group Ltd | Arts & recreation | 2022 |
| Portsmouth Property Management Ltd | Real estate | 2021 |
| Portwood Catering Ltd | Hospitality | 2014 |
| Posh Stuff Ltd | Wholesale & retail | 2020 |
| Posiwell Limited | Extraterritorial | 2013 |
| Pottos Services Limited | Health & social care | 2015 |
| Pound Plus Gosport Ltd | Wholesale & retail | 2026 |
| Powder KEG House Management Limited | Households | 2004 |
| Powder Monkey (Andover) Limited | Hospitality | 2024 |
| Powder Monkey Brewing Co IOW Limited | Manufacturing | 2024 |
| Powder Monkey Brewing Co Ltd | Manufacturing | 2019 |
| Powder Monkey Brewing Co Sales Limited | Wholesale & retail | 2024 |
| Powder Monkey Brewing Group Limited | Wholesale & retail | 2015 |
| Powder Monkey Group Limited | Financial services | 2023 |
| Powder Monkey IOW Limited | Manufacturing | 2024 |
| Powder Monkey IP Limited | Administrative & support | 2023 |
| Powder Monkey TAP House IOW Limited | Hospitality | 2024 |
| Powder Monkey TAP House Limited | Hospitality | 2019 |
| Power to the People (UK) Limited | Construction | 2008 |
| Praetorian MMA | Arts & recreation | 2025 |
| Prane Business Solutions Ltd | Hospitality | 2024 |
| Precious Smith Catering Services Ltd | Hospitality | 2018 |
| Precision Target Supplies Limited | Wholesale & retail | 2019 |
| Premier Property (Hampshire) Limited | Real estate | 2020 |
| Prestige Telecom Group Limited | Wholesale & retail | 2014 |
| Pride&Joy Tattoo Studio Ltd | Other services | 2025 |
| Prime Key Lettings & Management Ltd | Real estate | 2025 |
| Print & SEW Station Ltd | Wholesale & retail | 2014 |
| Prmdg Ltd | Hospitality | 2025 |
| Pro Derm Aesthetics Ltd | Other services | 2022 |
| Pro-Worx Engineering Limited | Administrative & support | 2013 |
| Profeeteroles Ltd | Wholesale & retail | 2024 |
| Professional Property Renovation Limited | Construction | 1997 |
| Progression Install Limited | Extraterritorial | 2016 |
| Progression Signage & Display Limited | Other services | 2017 |
| Project Oak Ltd | Professional & scientific | 2022 |
| Prometheus Property Holdings Ltd | Real estate | 2020 |
| Promiscura Ltd | Professional & scientific | 2015 |
| Propcon Ltd | Construction | 2020 |
| Property 22 Ltd | Real estate | 2024 |
| Protea Psychology Services Ltd | Professional & scientific | 2026 |
| Protect Your Paintwork Limited | Wholesale & retail | 2019 |
| Protego Consulting Ltd | Professional & scientific | 2025 |
| Proud Minds Education Limited | Education | 2025 |
| PRS Machining Ltd | Manufacturing | 2004 |
| PS31:3 Health Care Limited | Health & social care | 2016 |
| PSA Prime Marine Ltd | Manufacturing | 2021 |
| PSH Plumbing & Heating Ltd | Construction | 2023 |
| PUB Holdings Limited | Hospitality | 2025 |
| Puma Trading Limited | Wholesale & retail | 2018 |
| Purbrook Catering Company Ltd | Hospitality | 2014 |
| Purbrook Pharm Limited | Wholesale & retail | 2025 |
| Purbrook Pharm Property Limited | Real estate | 2025 |
| Pure Communication Group Limited | Information & communication | 2021 |
| Pure Elite Projects Limited | Construction | 2026 |
| Pureserve Security Services Ltd. | Administrative & support | 2022 |
| Purified Window Cleaning Ltd | Administrative & support | 2018 |
| Purity Care Services Ltd | Health & social care | 2024 |
| PUT a Tiger in Your Business Ltd | Professional & scientific | 2011 |
| Puzzle Piece Productions Ltd | Information & communication | 2021 |
| Pyramid Structures (Southern) Limited | Construction | 2016 |
| Pyramid Structures Group Limited | Financial services | 2016 |
| Python Automation & Supervisory Systems Ltd | Professional & scientific | 2024 |
| Qa-Ra Professional Services Limited | Professional & scientific | 2026 |
| Qadsha Ltd | Hospitality | 2024 |
| QP (Gosport) Limited | Hospitality | 2011 |
| QST Construction Services Limited | Construction | 2004 |
| Quadrex Projects Ltd | Construction | 2014 |
| Quality Regulatory Services (QRS) Ltd | Professional & scientific | 2009 |
| Quay Lane Boatyard Limited | Wholesale & retail | 1996 |
| Quay Motors Holdings Limited | Financial services | 2021 |
| Quay Motors Limited | Wholesale & retail | 2002 |
| Quay West Events Ltd | Hospitality | 2020 |
| Quaywest Studios Ltd | Information & communication | 2010 |
| Quick Tailor Limited | Wholesale & retail | 2025 |
| Quintus Estates Limited | Real estate | 2012 |
| Quite Content Ltd | Extraterritorial | 2022 |
| R & K Body Repairs Limited | Other services | 1997 |
| R & S Developments (South Coast) Limited | Administrative & support | 2008 |
| R C Brickwork & Construction Ltd | Extraterritorial | 2022 |
| R I J Electrical Services Ltd | Construction | 2018 |
| R L Barrett Limited | Real estate | 2021 |
| R L Plumbing and Heating (South Coast) Limited | Construction | 2018 |
| R Mcintosh Properties Limited | Real estate | 2026 |
| R&B Property Consultants Limited | Construction | 2022 |
| R&G Property Development Ltd | Real estate | 2025 |
| R&R Home Improvements Ltd | Construction | 2019 |
| R. Squibb Building Contractors Limited | Construction | 2001 |
| R.E.C. (South) Ltd | Construction | 2025 |
| R.I.S.E Support Services Ltd | Health & social care | 2021 |