| Naturals Health and Beauty Limited | Other services | 2019 |
| Neil Pickford Homes Limited | Real estate | 2016 |
| Nephin Consulting Ltd | Professional & scientific | 2021 |
| Nine Nine SIX Limited | Financial services | 2023 |
| Normu Associates Ltd | Financial services | 2024 |
| North Weald Fire Rescue Ltd | Public administration | 2018 |
| NORTH47 Holdings Limited | Financial services | 2026 |
| Oakbarn Properties Limited | Real estate | 2021 |
| Obstruents Limited | Financial services | 2021 |
| Offsite Limited | Information & communication | 1998 |
| Oliver James Creative Limited | Information & communication | 2021 |
| ON and on Consultants Limited | Professional & scientific | 2011 |
| ON and on Management Ltd | Professional & scientific | 2022 |
| One 2 One Furniture Limited | Construction | 2017 |
| One Technology Group Limited | Information & communication | 2002 |
| Ongar Road Estate Limited | Real estate | 1987 |
| OR Collective Limited | Wholesale & retail | 2022 |
| OUT of Site Ltd | Wholesale & retail | 2011 |
| OUT There Sports Limited | Wholesale & retail | 2010 |
| P J Tech Consulting Ltd | Information & communication | 2024 |
| P Judge Construction Services Ltd | Construction | 2020 |
| P.S.F. Holdings Ltd | Financial services | 2025 |
| P.S.F. Ltd. | Transport & logistics | 1998 |
| Palm Trees Development Limited | Construction | 2018 |
| Participation Dogs Ltd | Health & social care | 2019 |
| Paul Anton Limited | Construction | 2012 |
| PB Lifts Limited | Construction | 2018 |
| Pcml Investments Limited | Financial services | 2014 |
| Peak Performance Therapy Ltd | Health & social care | 2017 |
| Penvale Lakes and Fisheries Limited | Households | 2022 |
| Permanent Agriculture Ltd | Agriculture & fishing | 2025 |
| Pewitt Holdings Limited | Professional & scientific | 2024 |
| Phoenix Coach Trimmers Limited | Manufacturing | 2023 |
| Pick N MIX 2 U (Sweets) Ltd | Wholesale & retail | 2024 |
| Pickford Builders Limited | Construction | 2006 |
| Pilot IT Limited | Information & communication | 2009 |
| Pirlo Ltd | Construction | 2021 |
| PLUS10 Air Operations Limited | Transport & logistics | 2022 |
| PMP (Essex) Holdings Limited | Manufacturing | 2007 |
| Pondfield Limited | Households | 2011 |
| Porthcove Limited | Real estate | 2025 |
| Porto House Ltd | Wholesale & retail | 2023 |
| PPJ Aviation Engineering Services Ltd | Manufacturing | 2017 |
| Precision Moulded Products (Essex) Limited | Manufacturing | 1977 |
| Precision Moulded Products (UK) Limited | Manufacturing | 2010 |
| Premier Parties Limited | Hospitality | 2015 |
| Presidential Estates Limited | Real estate | 2015 |
| Pro Events Limited | Arts & recreation | 2020 |
| Pro-Tuition Dunmow LP | | 2023 |
| Pure Amps Electrical Limited | Construction | 2021 |
| Pure Food Group Limited | Wholesale & retail | 2025 |
| Purearth Evolution Ltd | Manufacturing | 2022 |
| Purebody Health Limited | Health & social care | 2014 |
| Purezza Holdings Limited | Financial services | 2019 |
| Purrfect Paws Physiotherapy Ltd | Professional & scientific | 2017 |
| QHP Properties Limited | Construction | 2016 |
| Quantum Leap Executive Development Ltd | Professional & scientific | 2020 |
| Quayside Inn (Falmouth) Limited | Hospitality | 2025 |
| Quayside Inn (Falmouth) Property Limited | Real estate | 2025 |
| Quinta Facilities Management Ltd | Administrative & support | 2024 |
| R G H Rubber and Plastics Limited | Manufacturing | 1990 |
| R J B Engineering (2001) Limited | Manufacturing | 2001 |
| R210 Ltd | Real estate | 2023 |
| RAM Transport Limited | Transport & logistics | 1978 |
| Ranwood Trading Limited | Extraterritorial | 2020 |
| Rapid Additive Manufacturing Limited | Manufacturing | 2025 |
| Reality Training Solutions Ltd | Transport & logistics | 2007 |
| Red COW (180) Limited | Hospitality | 2024 |
| Redrac Services Limited | Transport & logistics | 2016 |
| Reel Nice Productions Ltd | Information & communication | 2021 |
| Reeve Projects Limited | Professional & scientific | 2026 |
| Remitradar Ltd | Information & communication | 2014 |
| Renew Financial Solutions Limited | Professional & scientific | 2024 |
| Renton Leisure Limited | Wholesale & retail | 2019 |
| Revital Mind Therapy Limited | Other services | 2020 |
| RGH Converting Group Ltd | Financial services | 2024 |
| RGW Installations Limited | Construction | 2016 |
| Ribbonwood Ltd | Professional & scientific | 2022 |
| Rideform Essex Ltd | Extraterritorial | 2025 |
| Rifs Services Limited | Construction | 2018 |
| Riverstone Estates 2020 Limited | Financial services | 2025 |
| RJS Trading Limited | Construction | 2015 |
| Roaming Leisure Limited | Wholesale & retail | 2025 |
| ROB Whitwell Motor Engineer Limited | Professional & scientific | 2013 |
| Robinsons Caterers Limited | Hospitality | 2016 |
| Rockhill Farm Limited | Construction | 2018 |
| Romans Place Limited | Real estate | 2025 |
| Romford Builders Warehouse Limited | Wholesale & retail | 2023 |
| Romford Plastic Warehouse Limited | Wholesale & retail | 2023 |
| Ropers the Chemist Limited | Wholesale & retail | 1997 |
| RRJ Care Ltd | Health & social care | 2019 |
| S Robinson (Farms) Limited | Agriculture & fishing | 1965 |
| S.P.A. Window Cleaning Limited | Administrative & support | 2016 |
| Sabre Engineering UK Ltd | Professional & scientific | 2023 |
| Samui Events Limited | Administrative & support | 2017 |
| Sanbra Limited | Manufacturing | 2020 |
| Saporia Limited | Wholesale & retail | 2025 |
| Sarr Logistics Ltd | Transport & logistics | 2023 |
| Sarsam Logistics Ltd | Transport & logistics | 2023 |
| Satinhaus Limited | Extraterritorial | 2025 |