| Omniscient Consultancy Ltd | Administrative & support | 2016 |
| ON Point Enterprise Limited | Information & communication | 2020 |
| ON the Go Couriers and Logistics Ltd | Transport & logistics | 2024 |
| One Contract Services Ltd | Administrative & support | 2016 |
| One Stop Real Estate Ltd | Real estate | 2016 |
| One Touchless Wash Ltd | Wholesale & retail | 2019 |
| One World for Children CIC | Education | 2026 |
| Online 2022 Ltd | Hospitality | 2022 |
| Onyinye IWU Ltd | Arts & recreation | 2020 |
| OO Limited | Health & social care | 2002 |
| OOA Limited | Professional & scientific | 2019 |
| Oodleslove Healthcare Services Limited | Administrative & support | 2025 |
| OP Motors Ltd | Wholesale & retail | 2024 |
| Open Gates Target Ltd | Health & social care | 2022 |
| Openvision Limited | Construction | 2007 |
| Oprich Estates Ltd | Real estate | 2024 |
| Optimize GAS & Plumbing Limited | Construction | 2015 |
| Optimum Electrical Testing Ltd | Other services | 2026 |
| Options Care Limited | Health & social care | 2010 |
| Orbit Services Limited | Real estate | 2023 |
| Orbit TPJ Ltd | Wholesale & retail | 2026 |
| Orchid Supported Homes | Health & social care | 2018 |
| ORE Community Ltd. | Wholesale & retail | 2020 |
| ORE Tata Ltd | Transport & logistics | 2019 |
| Organic Aprico Limited | Wholesale & retail | 2025 |
| Organic Holdings Ltd | Professional & scientific | 2020 |
| Orion Travels Global Limited | Administrative & support | 2023 |
| Orvaxa Ltd | Wholesale & retail | 2026 |
| Orwani Ltd | Wholesale & retail | 2025 |
| Osman Construction Ltd | Construction | 2026 |
| Osmotic Power Ltd | Administrative & support | 2011 |
| Ottoman Oils Ltd | Wholesale & retail | 2021 |
| OUR Caribbean Shop Ltd | Wholesale & retail | 2020 |
| Outerweb Venue Obligor Limited | Financial services | 2021 |
| Over OUR Way Ltd | Real estate | 2021 |
| Overview Contractors Ltd | Information & communication | 1998 |
| Ovilux Limited | Construction | 2023 |
| Owencarehomes Ltd | Health & social care | 2026 |
| Oyelo Limited | Health & social care | 2021 |
| Ozceman Ltd | Hospitality | 2025 |
| P and M Hair & Beauty Ltd | Other services | 2025 |
| P D Consulting Limited | Information & communication | 2017 |
| P JNR Logistics Limited | Transport & logistics | 2024 |
| P R Enterprises Ltd | Wholesale & retail | 2010 |
| P-Autos Ltd | Wholesale & retail | 2017 |
| Pace Investments (Europe) Limited | Real estate | 2007 |
| Pacific Depths Limited | Professional & scientific | 2018 |
| Pacific Removals Limited | Transport & logistics | 2013 |
| PAK Artificial Flowers Limited | Wholesale & retail | 2024 |
| PAK Riders Ltd | Other services | 2022 |
| Palace Peri Peri Ltd | Hospitality | 2020 |
| Palavi UK CIC | Education | 2017 |
| Pamphyl Barbershop Ltd | Wholesale & retail | 2013 |
| Pandron Group Ltd | Wholesale & retail | 2026 |
| Pangloss Investments Ltd | Real estate | 2018 |
| Papagashie Limited | Professional & scientific | 2015 |
| Papatya 3 Ltd | Transport & logistics | 2009 |
| Papaya Investments Ltd | Construction | 2023 |
| Paramade Ltd | Manufacturing | 2023 |
| Parchmore Windows Limited | Construction | 2015 |
| Park ROW Terrace Bgrb Ltd | Real estate | 2023 |
| Parkwood Housing Ltd | Health & social care | 2020 |
| Parmak Motors Ltd | Wholesale & retail | 2021 |
| Particuliare Ltd | Health & social care | 2024 |
| Party Planners Swtk Ltd | Hospitality | 2025 |
| Party PON the Lawn Ltd | Hospitality | 2025 |
| Party Walls Surveyors Ltd | Professional & scientific | 2018 |
| PASHOV85 Ltd | Construction | 2017 |
| Passionate Domiciliary Care Limited | Health & social care | 2024 |
| Patel Infotech Limited | Information & communication | 2026 |
| Patelium Ltd | Wholesale & retail | 2025 |
| Pathfinder Enterprise Ltd | Information & communication | 2026 |
| Patidar Pizza Ltd | Hospitality | 2026 |
| Patriotic Eagles Foundation | Other services | 2025 |
| Patty & Dydy Boutique Limited | Wholesale & retail | 2025 |
| Patty Planet Ltd | Hospitality | 2024 |
| Paul Designs Limited | Wholesale & retail | 2025 |
| Paul's Place Limited | Professional & scientific | 2022 |
| Paws and Wiggles Ltd | Manufacturing | 2024 |
| Payal Tours & Travels Ltd | Administrative & support | 2026 |
| Payama Limited | Health & social care | 2024 |
| Peace BE Still Limited | Professional & scientific | 2014 |
| Pearglass Limited | Transport & logistics | 1981 |
| Pearl Close Management Limited | Households | 2020 |
| Pebble & Bloom Childcare Ltd | Health & social care | 2026 |
| Pebble Babies Clothing Ltd | Wholesale & retail | 2025 |
| PEC-OJE23 Ltd | Health & social care | 2023 |
| Pedigree Child Contact Centre Ltd | Health & social care | 2023 |
| Peegs Support Services C.I.C. | Wholesale & retail | 2020 |
| Peet Court Residents Association Limited | Households | 1980 |
| Peet Court Residents Freehold Limited | Households | 2015 |
| Pegie BEE Limited | Health & social care | 2022 |
| Pelangi Ltd | Hospitality | 2022 |
| Pentagon Property Developer Ltd | Real estate | 2022 |
| Perfectionist Unisex Salon Limited | Other services | 2022 |
| Peri Peri Grill Ltd | Hospitality | 2025 |
| Perpetual Group Residence Ltd | Information & communication | 2025 |
| Pest Control & Cleaning Ltd | Administrative & support | 2020 |
| Peter Obrien Construction Services Limited | Wholesale & retail | 2008 |
| Petrus&Co Ltd | Real estate | 2019 |