| Plymouth Property Photography Ltd | Professional & scientific | 2025 |
| Plymouth Property Sales Ltd | Real estate | 2021 |
| Plymouth Psychology Services Limited | Health & social care | 2023 |
| Plymouth PUB Ltd | Hospitality | 2026 |
| Plymouth Quality Lets Ltd | Real estate | 2020 |
| Plymouth Quality Roofing Limited | Construction | 2018 |
| Plymouth Radiators Limited | Wholesale & retail | 2008 |
| Plymouth Radio, Media and Arts CIC | Information & communication | 2019 |
| Plymouth Reactive Works Ltd | Construction | 2025 |
| Plymouth Recovery Initiatives Ltd | Health & social care | 2025 |
| Plymouth Rentals Limited | Real estate | 2012 |
| Plymouth Reptile and Aquatic Ltd | Agriculture & fishing | 2014 |
| Plymouth Residential Lettings Limited | Real estate | 2013 |
| Plymouth Romanian Organisation CIC | Wholesale & retail | 2023 |
| Plymouth Rooms Ltd | Administrative & support | 2019 |
| Plymouth Rounders Club C.I.C. | Education | 2023 |
| Plymouth Scaffold Supplies Limited | Wholesale & retail | 2025 |
| Plymouth Scallop Company Ltd | Manufacturing | 2026 |
| Plymouth School Sports Partnership C.I.C. | Education | 2016 |
| Plymouth Science CIC | Education | 2021 |
| Plymouth Science Park Limited | Real estate | 1996 |
| Plymouth Scrap Metals Ltd | Water & waste | 2024 |
| Plymouth Scrapstore CIC | Arts & recreation | 2011 |
| Plymouth Securitys Limited | Professional & scientific | 2008 |
| Plymouth Self Storage Limited | Transport & logistics | 2002 |
| Plymouth Skip BAG Hire Ltd | Water & waste | 2025 |
| Plymouth Skip Hire Ltd | Water & waste | 2021 |
| Plymouth Sling Library CIC | Education | 2016 |
| Plymouth Snooker Academy Ltd | Arts & recreation | 2022 |
| Plymouth Social Enterprise Network C.I.C. | Other services | 2014 |
| Plymouth Software Limited | Information & communication | 2011 |
| Plymouth Sound Properties Limited | Construction | 2019 |
| Plymouth Sparky Limited | Manufacturing | 2019 |
| Plymouth Sports Charity Limited | Arts & recreation | 2011 |
| Plymouth Stitch Ltd | Wholesale & retail | 2024 |
| Plymouth Stone Limited | Construction | 2012 |
| Plymouth Stores Ltd | Wholesale & retail | 2023 |
| Plymouth Student Accommodation Limited | Real estate | 2014 |
| Plymouth Supported Living Limited | Health & social care | 2009 |
| Plymouth Surveying Services Ltd | Professional & scientific | 2020 |
| Plymouth Taproom Ltd | Hospitality | 2026 |
| Plymouth Tax Returns Ltd | Professional & scientific | 2025 |
| Plymouth Taxis Ltd | Transport & logistics | 2023 |
| Plymouth Trailer Rentals Ltd | Administrative & support | 2025 |
| Plymouth Travel Group Ltd | Administrative & support | 2025 |
| Plymouth Travel Ltd | Transport & logistics | 2018 |
| Plymouth Travel Services Ltd | Transport & logistics | 2024 |
| Plymouth Ukraine Medical AID GB | Health & social care | 2024 |
| Plymouth Unifit & MOT Centre Limited | Wholesale & retail | 2012 |
| Plymouth Urology Partners LLP | | 2023 |
| Plymouth Van Hire Ltd | Administrative & support | 2021 |
| Plymouth Vanguard AFT CIC | Arts & recreation | 2023 |
| Plymouth Vehicle Recovery Limited | Wholesale & retail | 2014 |
| Plymouth Vineyard | Other services | 2003 |
| Plymouth VIP Barbers Ltd | Other services | 2024 |
| Plymouth VIP Taxi Ltd | Transport & logistics | 2025 |
| Plymouth Voice Group Limited | Information & communication | 2026 |
| Plymouth Warriors CIC | Arts & recreation | 2018 |
| Plymouth Water Events Group CIC | Education | 2021 |
| Plymouth Waterfront Partnership Limited | Professional & scientific | 2010 |
| Plymouth West Park Car Wash Ltd | Administrative & support | 2019 |
| Plymplastics Injection Moulding Ltd | Manufacturing | 2019 |
| Plymplumb Ltd | Construction | 2025 |
| Plympton Car Centre (Plymouth) Limited | Wholesale & retail | 2012 |
| Plympton Chiropractic Ltd | Health & social care | 2021 |
| Plympton Farmhouse Pizz Ltd | Hospitality | 2025 |
| Plympton Guru Ltd | Hospitality | 2025 |
| Plympton House Ltd | Construction | 2015 |
| Plympton MOT Centre Limited | Wholesale & retail | 2018 |
| Plympton Park Management Company Limited | Households | 2007 |
| Plympton Spice Delta Ltd | Hospitality | 2019 |
| Plympton Takeaway Ltd | Hospitality | 2023 |
| Plymquay (Management) Limited | Real estate | 1988 |
| Plymsand Limited | Hospitality | 2018 |
| Plymstock Albion Oaks Rugby Football Club Limited | Arts & recreation | 2009 |
| Plymstock Arts Festival CIC | Arts & recreation | 2026 |
| Plymstock Body Repairs Limited | Wholesale & retail | 2022 |
| Plymstock Double Glazing Solutions Ltd | Construction | 2021 |
| Plymstock GAS & Heating Systems Limited | Construction | 2002 |
| Plymstock Hand Car Wash Ltd | Administrative & support | 2024 |
| Plymstock Properties Limited | Real estate | 1996 |
| Plymstock Scaffolding Limited | Construction | 2022 |
| Plymstock Security Systems Ltd | Administrative & support | 2013 |
| Plymswim LLP | | 2026 |
| Plymtax Limited | Professional & scientific | 2020 |
| Plymx Security Ltd | Administrative & support | 2026 |
| Pm&Es Ltd | Construction | 2024 |
| PMC Education Trust | Education | 2004 |
| PMC Electrical (SW) Ltd | Construction | 2019 |
| PME Energies Limited | Professional & scientific | 2013 |
| PME Power Systems Group Limited | Professional & scientific | 1996 |
| PME Property Group Holdings Ltd | Financial services | 2023 |
| PML Applications Ltd | Professional & scientific | 2001 |
| PML Education (SW) Ltd | Education | 2021 |
| PML Education Ltd | Education | 2013 |
| PMM Electrical Services Ltd | Construction | 2023 |
| PMS (Facilities) Plymouth Limited | Administrative & support | 2002 |
| PMW Plumbing & Heating Limited | Construction | 2017 |
| PN Family Office Ltd | Professional & scientific | 2023 |
| Pn-Project Management Ltd | Construction | 2018 |