| R. Dullage Ltd | Financial services | 2003 |
| R. L. S. Drainage Ltd | Water & waste | 2023 |
| Radicool Services Ltd | Construction | 2021 |
| Radm Consultancy Limited | Professional & scientific | 2014 |
| Rainbow Property Partnership Ltd | Construction | 2009 |
| Rainham Eazystore Limited | Administrative & support | 2008 |
| Rankin Farms Limited | Agriculture & fishing | 1994 |
| Ratcliffe Ltd. | Construction | 2016 |
| Rattan Modular Solutions Ltd | Other services | 2022 |
| Ravk Limited | Health & social care | 2021 |
| Rayleigh Fencing Ltd | Construction | 2018 |
| Rbmh Properties Ltd | Real estate | 2021 |
| RD AC Services Ltd | Construction | 2014 |
| RE Vive Property Maintenance Limited | Construction | 2006 |
| Reason Group Holdings Limited | Construction | 2025 |
| Reclamation & Demolition Consulting Services Limited | Construction | 2022 |
| Recup Ltd | Wholesale & retail | 2016 |
| Red Hart Therapy Ltd | Health & social care | 2023 |
| Redcastle Advisory Limited | Professional & scientific | 2024 |
| Redd Mohican Limited | Wholesale & retail | 2017 |
| Redelement Limited | Information & communication | 2013 |
| Redman Social Limited | Information & communication | 2024 |
| Redwards Wealth Management Limited | Financial services | 2012 |
| Reeceryan Ltd | Real estate | 2001 |
| Reform Architecture and Interior Design Limited | Professional & scientific | 2021 |
| Reform Design and Construction Limited | Construction | 2024 |
| Reform Property and Development Limited | Extraterritorial | 2021 |
| Regal Kitchens Ltd | Construction | 2009 |
| Regan Group Services Limited | Construction | 2023 |
| Regnig Limited | Wholesale & retail | 2022 |
| Rehoboth Care Solutions Ltd | Health & social care | 2024 |
| Relapse Reels Limited | Information & communication | 2026 |
| Reliabuild (Essex) Ltd | Construction | 2022 |
| REM Catering (UK) Limited | Hospitality | 2017 |
| Rempstone Hill Solar Farm Limited | Energy | 2020 |
| Rend Lifting Management Ltd | Professional & scientific | 2019 |
| RES Build Limited | Construction | 2019 |
| Residentiallandlord.Co.Uk Limited | Information & communication | 2005 |
| Resolution Marine Ltd | Manufacturing | 2016 |
| Response Media Limited | Professional & scientific | 2001 |
| Results AM Ltd | Real estate | 2018 |
| Retail Stone Limited | Wholesale & retail | 2010 |
| Rezicom Roofing Ltd | Construction | 2026 |
| RF & Noise Components Ltd | Manufacturing | 2003 |
| RGM Network Consulting Ltd | Information & communication | 2024 |
| RGS Fire Protection Limited | Construction | 2025 |
| Rhims Limited | Information & communication | 2013 |
| Richardson Brickwork Ltd | Construction | 2008 |
| Right Choice Roof Repairs Ltd | Construction | 2025 |
| Risk Management Systems Limited | Information & communication | 2018 |
| Riverside Orchard Estates Limited | Real estate | 2020 |
| Riverside Orchard Investments Limited | Real estate | 2020 |
| Riverside Site Safety Limited | Professional & scientific | 2023 |
| Riverview Medical Services Ltd | Health & social care | 2022 |
| RJ Smith Developments Limited | Construction | 2017 |
| RKS AJI Ltd | Professional & scientific | 2026 |
| RL South Street Properties Limited | Households | 2014 |
| Rmjb Solutions Limited | Financial services | 2015 |
| RN Design Ltd | Professional & scientific | 2018 |
| RNR Furniture Ltd | Other services | 2012 |
| Roadmen Running Ltd | Information & communication | 2025 |
| Robingale Holdings Ltd | Financial services | 2021 |
| Robingale Homes (Amberstone) Limited | Real estate | 2021 |
| Robingale Homes Limited | Construction | 2018 |
| Robingale Surveyors Limited | Professional & scientific | 2025 |
| Rochford Community Church Trust | Other services | 1999 |
| Rochford Guardians Ltd | Extraterritorial | 2022 |
| Rochford Property Maintenance Ltd | Construction | 2024 |
| Rochford Removals & Storage Limited | Administrative & support | 2007 |
| Rochford Web Designs Limited | Information & communication | 2023 |
| Rockamilly Franchising Ltd | Administrative & support | 2020 |
| Rockamilly Ltd | Wholesale & retail | 2017 |
| Rockman Enterprises Ltd | Professional & scientific | 2016 |
| Rodwell Memorials Limited | Manufacturing | 2022 |
| Rohan Bay MGT Co Limited | Real estate | 2014 |
| Rohit Singh Hospitality Consulting Ltd | Professional & scientific | 2026 |
| Rojo Distribution (Europe) Limited | Wholesale & retail | 2009 |
| Roller Shutters Online Limited | Professional & scientific | 2013 |
| Roothway Builders Ltd | Construction | 2013 |
| Ropefall 1 LLP | | 2024 |
| Ropefall GP Limited | Administrative & support | 2024 |
| Ropefall LP | | 2024 |
| Rothwell and Sons Ltd | Administrative & support | 2020 |
| RPA Fencing & Gate Specialist Ltd. | Real estate | 2010 |
| RRJ Consultants Limited | Information & communication | 2022 |
| RS Sports Cards Ltd | Other services | 2026 |
| RSE Contractors Limited | Construction | 2020 |
| RSS Productions Limited | Information & communication | 2023 |
| RTR Electrics Limited | Construction | 2022 |
| RTW Financial Markets Limited | Extraterritorial | 2013 |
| Ruggles & Jeffery Holdings Limited | Administrative & support | 1998 |
| Ruggles & Jeffery Limited | Construction | 1992 |
| Rush Green Oasis Limited | Wholesale & retail | 2003 |
| RWA Utilities Limited | Construction | 2013 |
| Ryan Building Contractors Ltd | Construction | 2004 |
| Ryanreece Ltd | Real estate | 2017 |
| S & N Investment Property Developments Ltd | Real estate | 2016 |
| S a Raza Limited | Health & social care | 2012 |
| S J Stone Financial Limited | Financial services | 2012 |
| S James Property Ltd | Construction | 2024 |