| Nwayah Ltd | Health & social care | 2014 |
| O'Dell Developments Ltd | Construction | 2024 |
| Oak Accounting Services Ltd | Professional & scientific | 2015 |
| Oakleigh Consultants Limited | Professional & scientific | 2019 |
| Obscur Lighting Ltd | Construction | 2024 |
| Ofdur Ltd | Health & social care | 2025 |
| Office Hub East Limited | Administrative & support | 2020 |
| OH & Co Skincare Ltd | Manufacturing | 2025 |
| OIL of Essence Ltd | Wholesale & retail | 2021 |
| Ojtd Limited | Real estate | 2019 |
| Ok-Cool Refrigeration & Air Conditioning Ltd | Construction | 2026 |
| Old Bespoke Limited | Real estate | 2019 |
| OMO Solutions Ltd | Information & communication | 2024 |
| Once Bitten Music Limited | Professional & scientific | 2009 |
| One Health & Lifestyle Ltd | Wholesale & retail | 2022 |
| Oneoak Property Group Ltd | Construction | 2025 |
| Online Marketing Help Limited | Information & communication | 2019 |
| Openhouse Technologies Ltd | Information & communication | 2025 |
| OUR Little Angelz (3) Limited | Education | 2017 |
| OUT OUT Entry Limited | Administrative & support | 2019 |
| Outsource Education Group Limited | Professional & scientific | 2010 |
| Outsource Vocational Learning Limited | Professional & scientific | 2000 |
| Over the Edge Solutions Ltd | Administrative & support | 2025 |
| Over the Top Brewery Co. Ltd | Wholesale & retail | 2025 |
| Ozer Cafe Ltd | Hospitality | 2025 |
| P Dopson & Sons Ltd | Construction | 2026 |
| P&L Homes Ltd | Real estate | 2026 |
| Pad&Co Ltd | Professional & scientific | 2020 |
| Padelmews Limited | Arts & recreation | 2025 |
| Parana Management Limited | Professional & scientific | 2009 |
| Parkash & Sons Ltd | Wholesale & retail | 2015 |
| Patient Choice Ltd | Wholesale & retail | 2011 |
| PAYLESS4ACAR Ltd | Wholesale & retail | 2021 |
| PAYLESS4IT Ltd | Transport & logistics | 2022 |
| Penton and Blackwell Limited | Hospitality | 2022 |
| Percom Limited | Manufacturing | 2013 |
| Perella Floors Ltd | Construction | 2020 |
| Pilates Journey Ltd | Arts & recreation | 2024 |
| Pine Prana Limited | Professional & scientific | 2010 |
| Pitch Perfect Gaming Ltd | Arts & recreation | 2026 |
| Pixel Motion Studio Limited | Information & communication | 2016 |
| Pixelfix Ltd | Other services | 2018 |
| PJG Building Services Limited | Construction | 2013 |
| Pkay Group Ltd | Information & communication | 2026 |
| Plane and Simple Engineering Ltd | Manufacturing | 2015 |
| Platinum Tech Solutions Limited | Information & communication | 2015 |
| Player Packs Ltd | Wholesale & retail | 2019 |
| PM Media Services Limited | Information & communication | 2016 |
| Podesta Roofing Co. Limited | | 1983 |
| Polardreams Limited | Health & social care | 2003 |
| Polyton Limited | Professional & scientific | 2022 |
| Power BID X Limited | Professional & scientific | 2026 |
| Premier MOT Skills and Compliance Limited | Education | 2025 |
| Present Planet Ltd | Wholesale & retail | 2023 |
| PRF Control Limited | Professional & scientific | 2018 |
| PRINT4ALL Limited | Information & communication | 2013 |
| Priority Property Management Limited | Real estate | 2019 |
| Prize Paradise Ltd | Other services | 2020 |
| Prkr Limited | Professional & scientific | 2024 |
| Pro Toy Selling Ltd | Wholesale & retail | 2020 |
| Proactive One Network Ltd | Financial services | 2025 |
| Proactive Pest Control Ltd | Administrative & support | 2024 |
| Proctor Property Holdings Limited | Real estate | 2021 |
| Propsk Ltd | Households | 2024 |
| Protak Drylining Specialist Limited | Construction | 2014 |
| Pump'D Gym Ltd | Arts & recreation | 2025 |
| Purple Logic Limited | Professional & scientific | 2017 |
| Q Spec Limited | Professional & scientific | 2024 |
| Quinn & Snell Ltd | Wholesale & retail | 2023 |
| R B C Projects Limited | Construction | 2010 |
| R J Ellis Ltd | Construction | 2010 |
| Raac Solutions Limited | Construction | 2025 |
| Radha Retail Ltd | Wholesale & retail | 2026 |
| Radiance Aesthetics Limited | Other services | 2020 |
| Radiance Aesthetics Skincare Limited | Other services | 2024 |
| Rapid Wealth Limited | Real estate | 2024 |
| Raybridge Total Construction Ltd | Construction | 2012 |
| Rayleigh Company Services Ltd | Administrative & support | 1997 |
| RCH Refurbishment Limited | Construction | 2018 |
| Recciii Group Ltd | Information & communication | 2020 |
| Rectory Road Residents Association Limited | Real estate | 1984 |
| Redford Electrical Contractors Limited | Administrative & support | 2017 |
| Redline Solutions Ltd | Administrative & support | 2025 |
| Reflectionphotobooths Ltd | Professional & scientific | 2016 |
| Repassage DRY Cleaners Ltd | Other services | 2019 |
| Reputable Pet Products Limited | Wholesale & retail | 2016 |
| Retroplanet Ltd | Professional & scientific | 2013 |
| Rhigos RD Ltd | Professional & scientific | 2022 |
| RHO Sigma Consulting Private Ltd | Professional & scientific | 2018 |
| Rico Group (UK) Ltd | Real estate | 2025 |
| Ring-A-Rod Limited | | 1981 |
| River Breeze Cafe & Bar Ltd | Hospitality | 2018 |
| RJB Services (Essex) Limited | Construction | 2018 |
| Rorp Clothing Ltd | Manufacturing | 2025 |
| Rose Petal Care Ltd | Health & social care | 2012 |
| Rosecall Limited | Other services | 2004 |
| ROY White Limited | Professional & scientific | 2010 |
| RRG Fairbairn Limited | Professional & scientific | 2019 |
| Rudyom Ltd | Health & social care | 2025 |
| Run Wild Design Ltd | Information & communication | 2023 |