| Omega Interiors Limited | Administrative & support | 2002 |
| Opengate Pictures Limited | Information & communication | 2015 |
| Original Property Management Limited | Real estate | 2020 |
| OSL Contracts Limited | Construction | 2021 |
| Otto Transport Limited | Transport & logistics | 2014 |
| Ovalfine Limited | | 1983 |
| P B L Contracts Limited | Construction | 2011 |
| P.E.M. Plant & Chemicals International Limited | Manufacturing | 1977 |
| Paddock Close Henham Management Ltd | Households | 2022 |
| Padma Shahi Limited | Health & social care | 2024 |
| Papillon (UK) Ltd | Wholesale & retail | 2014 |
| Paragon Fitness Ltd | Arts & recreation | 2013 |
| Park Lane Property Agents Ltd | Real estate | 2016 |
| Paseo Equestrian Limited | Wholesale & retail | 2023 |
| Patrick Robert Limited | Other services | 2010 |
| Paul Dawson & Co. Limited | Professional & scientific | 2000 |
| Paul FEY Limited | Professional & scientific | 2013 |
| People Pathways HR Solutions Ltd | Professional & scientific | 2024 |
| Personnel Link Employment Group Holdings Limited | Financial services | 2022 |
| Personnel Link Employment Group Ltd | Administrative & support | 2020 |
| Personnel Organisers Ltd. | Administrative & support | 1998 |
| Pharmaformulations Limited | Professional & scientific | 2013 |
| PHF Electrical Ltd | Professional & scientific | 2011 |
| PHF Fire Limited | Public administration | 2023 |
| Phil Green Consulting Ltd | Professional & scientific | 2016 |
| PHJ Consulting Services Ltd | Professional & scientific | 2021 |
| Pink Key Licensing Limited | Professional & scientific | 2005 |
| Pinnacle Modelmakers Ltd | Administrative & support | 2011 |
| Plan B Aviation Limited | Administrative & support | 2009 |
| Platinum Corporate Events Ltd | Administrative & support | 2015 |
| Platinum Hot Tubs UK Limited | Arts & recreation | 2017 |
| Pledgdon Hall Farm Limited | Agriculture & fishing | 2003 |
| Pluto Probate and Wills Ltd | Professional & scientific | 2025 |
| Plutus Construction Limited | Real estate | 2022 |
| PMS Cambridge Limited | Construction | 2006 |
| Pooch'D Grooming Ltd | Other services | 2022 |
| Power of One Trading Limited | Administrative & support | 2022 |
| PPS Pumps Ltd | Manufacturing | 2015 |
| Price Bailey Corporate Holdings NO 2 Limited | Professional & scientific | 2016 |
| Price Bailey LLP | | 2004 |
| Price Bailey Mayfair LLP | | 2011 |
| Price Bailey Private Client LLP | | 2007 |
| Priestgate Management Ltd | Construction | 2018 |
| Princes Property Ltd | Real estate | 2018 |
| Prodrive Logistics Recruitment Limited | Administrative & support | 2026 |
| Professional Nursing Services Limited | Health & social care | 1997 |
| Prospace Projects Limited | Professional & scientific | 2025 |
| Provincial House Eastbourne Limited | Construction | 2011 |
| Provincial House Estates (Lowton) Limited | Real estate | 2002 |
| Provincial House Estates Limited | Extraterritorial | 2001 |
| Purple Orchid Ltd | Real estate | 2021 |
| Quartet Communications Limited | Information & communication | 2008 |
| Quasar Electronics Limited | Manufacturing | 2000 |
| Quest Thoroughbreds Limited | Professional & scientific | 2024 |
| R Buchanan Property Limited | Real estate | 2023 |
| R D M Test Equipment (Holdings) Limited | Financial services | 2021 |
| R H Distributors Limited | Wholesale & retail | 2016 |
| R Handford and Co Podiatry Ltd | Health & social care | 2011 |
| R Simkins Interiors Limited | Construction | 2012 |
| Rainbow Day Nursery (Harlow) Limited | Education | 2009 |
| Raindrops Day Nursery Limited | Education | 2009 |
| Ratcliff & Burridge Construction Ltd | Construction | 2004 |
| Raveley Business Services LLP | | 2010 |
| Ravenrace Limited | Real estate | 1989 |
| Rebel Strength Limited | Manufacturing | 2015 |
| Red Heart Design Limited | Administrative & support | 2011 |
| Regent Print Ltd | Manufacturing | 2002 |
| Release Records Ltd | Arts & recreation | 2015 |
| Remindably Limited | Wholesale & retail | 2022 |
| Rent a Hair Chair Limited | Other services | 2022 |
| Residential Fire Sprinklers Limited | Construction | 2000 |
| Resilient Endeavours Group Ltd | Professional & scientific | 2014 |
| Retailx Limited | Information & communication | 2016 |
| Rewaco Trikes UK Ltd | Wholesale & retail | 2008 |
| Reynolds 1934 Ltd | Construction | 2010 |
| Reynolds 1994 Limited | Construction | 1994 |
| Reynolds Microphones Ltd | Manufacturing | 2014 |
| Richards Framing Ltd | Wholesale & retail | 2016 |
| Richards Roadways Limited | | 1988 |
| Rimelo Consulting Limited | Professional & scientific | 2008 |
| Riskshield Limited | Professional & scientific | 2001 |
| Rivermead Communications Limited | Information & communication | 1996 |
| RJC Interiors (Hygienic) Limited | Administrative & support | 2011 |
| RJI Global Services Ltd | Professional & scientific | 2024 |
| RJV Group Limited | Construction | 2019 |
| Roastery Hope Coffee Ltd | Manufacturing | 2016 |
| Roberts & Davis Trustees Limited | Other services | 1995 |
| Roger Carlton (Structures) Limited | Professional & scientific | 1977 |
| Roof Care Company (Industrial) Limited | Construction | 2021 |
| Rookwood Assets Limited | Real estate | 2026 |
| Royletest Limited | Real estate | 1979 |
| RP Software Solutions Ltd | Information & communication | 2011 |
| RTM Projects Limited | Professional & scientific | 2018 |
| Rubicon X Trading Ltd | Professional & scientific | 2009 |
| Rust & SON Ltd | Construction | 2024 |
| S & P Developers Limited | Construction | 2017 |
| S&L Plant Hire Limited | Administrative & support | 2021 |
| S. S. Romaine Building Services Limited | Construction | 2025 |
| S.O.T Ministry Ltd | Administrative & support | 2026 |
| Safelee Training Ltd | Education | 2016 |