| Project Beaver Ltd | Administrative & support | 2025 |
| Project Cakes Ltd | Hospitality | 2021 |
| Project Dead Space CIC | Administrative & support | 2024 |
| Project Fashion Fixed CIC | Education | 2023 |
| Project Management Solutions Lincs Ltd | Professional & scientific | 2015 |
| PROJECT97 Ltd | Wholesale & retail | 2026 |
| Projectseven Design Consultants Limited | Manufacturing | 2012 |
| Promed Services Ltd | Health & social care | 2019 |
| Promig Properties Limited | Real estate | 2025 |
| Promni Health Group Limited | Financial services | 2023 |
| Promni Health Limited | Health & social care | 2020 |
| Promodo (UK) Ltd | Information & communication | 2010 |
| Propel Growth Ltd | Professional & scientific | 2021 |
| Propertiesbyjj Limited | Real estate | 2023 |
| Property Biznes Ltd | Real estate | 2024 |
| Property Buyers Today Limited | Real estate | 2024 |
| Property Investments & Projects Limited | Real estate | 2012 |
| Property K2 Ltd | Real estate | 2015 |
| Property Renovations (ELY) Limited | Real estate | 2005 |
| Property Rental Partners Limited | Real estate | 2021 |
| Propertyadd Limited | Information & communication | 2018 |
| Proprius Solicitors Limited | Professional & scientific | 2025 |
| Propserv Construction & Maintenance Limited | Construction | 2022 |
| Prosafe Pslp (UK) Ltd | Professional & scientific | 2018 |
| Prosma Ltd | Construction | 2009 |
| Prospect Place Ltd | Construction | 2011 |
| Prospect Property Lincs Limited | Real estate | 2017 |
| Prosper Digital Ltd | Information & communication | 2023 |
| Prosperity Community Service CIC | Hospitality | 2026 |
| Protego Autocare Limited | Other services | 2021 |
| Proto-Type Theater | Arts & recreation | 2008 |
| PROUD2BSAFE Ltd | Professional & scientific | 2011 |
| Provac Systems Limited | Manufacturing | 2007 |
| Prowebgroup Ltd | Information & communication | 2022 |
| Prowebsoft Ltd | Information & communication | 2022 |
| PRS Autos Lincoln Limited | Wholesale & retail | 2017 |
| PRS Housing Holdings Limited | Real estate | 2026 |
| PS Rentals Limited | Administrative & support | 2012 |
| Psalm 84 V. 10 | Other services | 1999 |
| Psychiatric Consulting Services Ltd | Health & social care | 2019 |
| Psychological Insights Limited | Health & social care | 2015 |
| Psychological Support Intervention(Psi) Ltd | Other services | 2014 |
| Psychological Therapeutic Solutions Ltd | Health & social care | 2015 |
| PT Whitehead Consultancy Ltd | Information & communication | 2025 |
| PTG Community Ltd | Other services | 2026 |
| PTL Logistics Ltd | Wholesale & retail | 2021 |
| PTS Couriers Limited | Transport & logistics | 2015 |
| Ptslawncare Ltd | Administrative & support | 2025 |
| Pufferfish Property Ltd | Real estate | 2024 |
| PUHI-78 Ltd | Construction | 2018 |
| Pulchra Domi Ltd | Extraterritorial | 2021 |
| Pullen (Gainsborough) Ltd | Hospitality | 2010 |
| Pulsetrain Limited | Professional & scientific | 2024 |
| Puma Automotive Design Ltd | Manufacturing | 2017 |
| Punjab Cars Ltd | Administrative & support | 2025 |
| Punk Dogz Limited | Hospitality | 2023 |
| Pure Air Ltd | Construction | 2023 |
| Pure and Preloved Limited | Wholesale & retail | 2025 |
| Pure Heart Health Limited | Health & social care | 2022 |
| Pure Hearts Solutions Limited | Health & social care | 2022 |
| Pure Psychology Ltd | Health & social care | 2016 |
| Pure Tool Repairs Ltd | Manufacturing | 2024 |
| Purely Hampers Limited | Wholesale & retail | 2023 |
| Purple Holly Limited | Wholesale & retail | 2010 |
| Purple Robot Limited | Education | 2013 |
| Purpose Panda Coaching Ltd | Administrative & support | 2025 |
| Purvis Property Holdings Ltd | Households | 2023 |
| Pusb Ltd | Real estate | 2023 |
| Puzzles Ltd | Wholesale & retail | 2026 |
| Pvsk Limited | Professional & scientific | 2025 |
| PW ROV Ltd | Professional & scientific | 2021 |
| Pyrah Botanicals Ltd | Manufacturing | 2020 |
| PZL Ltd | Arts & recreation | 2018 |
| Q & D Property Limited | Real estate | 2023 |
| Qaziecom Limited | Wholesale & retail | 2025 |
| QC PUB Co Holdings Ltd | Real estate | 2024 |
| QC PUB Co Lincoln Limited | Hospitality | 2021 |
| QCI Cambridge Limited | Health & social care | 2025 |
| QED Automation Limited | Professional & scientific | 2023 |
| Qgee Limited | Wholesale & retail | 2008 |
| QJS (UK) Limited | Manufacturing | 2011 |
| QS Lincoln 2025 Limited | Construction | 2025 |
| QSD Enterprises Ltd | Transport & logistics | 2017 |
| Quadrant ENT LLP | | 2013 |
| Qualities UN Limited | Professional & scientific | 2017 |
| Quality Assured Training Limited | Other services | 2026 |
| Quality Business Advice Ltd | Professional & scientific | 2013 |
| Quality Triumphs Ltd | Real estate | 2013 |
| Quantum Cost Consult Limited | Construction | 2017 |
| Quantumwave Systems Limited | Information & communication | 2023 |
| Quark Motorsport Ltd | Manufacturing | 2002 |
| Quarry Garage (Waddington) Limited | Wholesale & retail | 2008 |
| Quasar Investments Limited | Real estate | 2024 |
| Quay Bronze Limited | Construction | 2000 |
| Quayside Coffee Ltd | Hospitality | 2018 |
| Queen BEE Pest Management Ltd | Administrative & support | 2026 |
| Queensgate Management (East Midlands) LLP | | 2010 |
| Quest CS Ltd | Information & communication | 2007 |
| Quick Easy Quote Ltd | Information & communication | 2011 |
| Quickmod Ltd | Information & communication | 2025 |