| Observetis Ltd | Professional & scientific | 2016 |
| Occam Consultancy Ltd | Information & communication | 2024 |
| ODC Limited | Construction | 1999 |
| Offsite Fabrications Ltd | Manufacturing | 2021 |
| OH My Dog (Scotland) Ltd | Wholesale & retail | 2020 |
| Ohmmeter Technical & Engineering Services Ltd | Construction | 2024 |
| OJO Logistics Ltd. | Transport & logistics | 2019 |
| Olison Ltd | Construction | 2016 |
| OMG Property Ltd. | Real estate | 2013 |
| ON Facilities Management Ltd | Construction | 2018 |
| ON Facilities Solutions Ltd | Construction | 2025 |
| ON Site Fixings Ltd | Administrative & support | 2014 |
| ON Three Design Limited | Professional & scientific | 2011 |
| One Recruitment Glasgow/Lanarkshire Ltd | Administrative & support | 2015 |
| Onyx Moon Ltd | Other services | 2024 |
| Optimal Health & Fitness Ltd | Health & social care | 2021 |
| OR8811 Limited | Hospitality | 2025 |
| Orbital Renewable Engineering Limited | Other services | 2019 |
| Orchard Basket Ltd | Wholesale & retail | 2025 |
| Oscar Supplier Limited | Transport & logistics | 2026 |
| Osteg Homes Ltd | Construction | 2017 |
| Ostrovska Ltd | Wholesale & retail | 2024 |
| Ostrowski Ltd | Other services | 2015 |
| Outboxed Ltd | Transport & logistics | 2024 |
| Outshine Travel Ltd | Administrative & support | 2025 |
| Ovens Feast Ltd | Hospitality | 2020 |
| Overton Wind Limited | Energy | 2017 |
| OZ Technology Ltd | Information & communication | 2022 |
| P H Autos Limited | Wholesale & retail | 2023 |
| P S Ridgway Group Limited | Professional & scientific | 2000 |
| P T S Limited | Professional & scientific | 1982 |
| P&C Services (Scotland) Ltd | Real estate | 2025 |
| P&D Scotland Limited | Administrative & support | 2012 |
| P.F.T. Scotland Ltd. | Wholesale & retail | 2005 |
| P.T.P.T Ltd | Wholesale & retail | 2021 |
| Paint My Home by Bell Limited | Construction | 1956 |
| Painting Maintenance Project Management Limited | Construction | 2015 |
| PAPAHAIR16 Limited | Other services | 2024 |
| Paris Management Services Limited | Construction | 2023 |
| Parkinson's Self Help Group (North Lanarkshire) | Other services | 2003 |
| PAT Boyle Transport Ltd | Transport & logistics | 2010 |
| PAT Building Service Ltd | Construction | 2019 |
| Paterson Developments NO1 Ltd | Real estate | 2024 |
| Patronus Safety Ltd | Professional & scientific | 2025 |
| Patton Construction Services Ltd | Construction | 2016 |
| Paul Sparkes Spiritual Coach Ltd | Other services | 2024 |
| Paulp Ltd | Transport & logistics | 2025 |
| Pavetec Ltd. | Construction | 2015 |
| Pawson Property and Holdings Limited | Real estate | 2026 |
| Pawter Pals Ltd | Agriculture & fishing | 2022 |
| Pawter's Pals Ltd | Agriculture & fishing | 2025 |
| Pawz United Ltd | Wholesale & retail | 2025 |
| Pcsg Limited | Construction | 2020 |
| PDC Plant Limited | Construction | 2009 |
| Pdtpro Limited | Information & communication | 2008 |
| Pearl White Dental Laboratory Ltd | Manufacturing | 2009 |
| Penuel Care Services Ltd | Health & social care | 2024 |
| Peregrine Performance Ltd | Professional & scientific | 2019 |
| Peregrine Performance Parts Ltd | Wholesale & retail | 2019 |
| Perry Communications Limited | Information & communication | 2023 |
| Pesin Ltd | Administrative & support | 2025 |
| Pest Control - Environmental Services Limited | Professional & scientific | 2019 |
| Peter Campbell (Sales) Ltd. | Manufacturing | 2004 |
| Peter Dunbar & Co Ltd | Construction | 2023 |
| Peter Parrot Productions Ltd | Information & communication | 2026 |
| Peters Heating & Plumbing Ltd | Construction | 2024 |
| Pets 'N' Things Ltd | Wholesale & retail | 2026 |
| PG Residential Limited | Real estate | 2026 |
| Phoenix Composites Ltd | Professional & scientific | 2024 |
| Phoenix Environmental Ltd | Water & waste | 2023 |
| Phoenix Licensed Grocers Ltd | Wholesale & retail | 2025 |
| Phonegeekers Ltd | Wholesale & retail | 2023 |
| Pinebarberco Limited | Other services | 2026 |
| Piotr R Transport Ltd | Transport & logistics | 2025 |
| Plains 115 Limited | Hospitality | 2023 |
| Plains Autocare Ltd | Wholesale & retail | 2026 |
| Plains Garage (Scotland) Limited | Wholesale & retail | 2010 |
| Plastering Perfect Ltd | Construction | 2020 |
| Plasterx Ltd | Construction | 2024 |
| PLATFORM97 Ltd | Hospitality | 2023 |
| Platinum Trendz Ltd | Wholesale & retail | 2025 |
| Platinum Wind Services Ltd | Manufacturing | 2022 |
| Plebeian Ltd | Information & communication | 2024 |
| Plug-In Finance Ltd | Professional & scientific | 2024 |
| PMB Ltd | Transport & logistics | 2021 |
| Pococafe Limited | Hospitality | 2026 |
| POINT5 Theatre Ltd | Administrative & support | 2024 |
| Pol-Scot Contracts Limited | Construction | 2009 |
| Pooch Perfect Grooming Spa Ltd | Other services | 2021 |
| Pooch Perfect Pet Transport Ltd | Other services | 2023 |
| Power Electrical Services Scotland Ltd | Construction | 2021 |
| Poweron Domestics Ltd | Construction | 2025 |
| Pragma Code Ltd | Information & communication | 2024 |
| Precision CONTRACTS24 Ltd | Construction | 2024 |
| Precision Painting Contractors Ltd | Construction | 2023 |
| Precision Painting Contracts Ltd | Construction | 2025 |
| Preloved Clothing Scotland Ltd | Wholesale & retail | 2026 |
| Premier GAS Installs Ltd | Construction | 2020 |
| Premier Group Scotland Ltd | Administrative & support | 2020 |
| Premier Property Solutions (Lanarkshire) Limited | Construction | 2016 |