| Riverside Complex Limited | Wholesale & retail | 2023 |
| Riverside Westcliff Limited | Hospitality | 2022 |
| Riverstone Limited | Extraterritorial | 2009 |
| Riverview Windows Ltd | Manufacturing | 2021 |
| Riverwalk Media Ltd | Information & communication | 2018 |
| Rizk Medics Ltd | Health & social care | 2023 |
| RJ2 Property Limited | Construction | 2025 |
| RJJ Associates Limited | Information & communication | 2008 |
| RJN Housing Ltd | Real estate | 2024 |
| RK & Partners Ltd | Wholesale & retail | 2025 |
| RM Design & Print Limited | Manufacturing | 2014 |
| RM Drainage and Plumbing Ltd | Water & waste | 2018 |
| RMG Shoeburyness Ltd | Wholesale & retail | 2021 |
| RN Harrison Consultancy Ltd | Health & social care | 2025 |
| RNN Tech Ltd | Information & communication | 2026 |
| RNR Jewellery Limited | Wholesale & retail | 2023 |
| Roachview Ltd | Construction | 2026 |
| Road to Green Limited | Professional & scientific | 2012 |
| ROB Green Engineering Limited | Information & communication | 2022 |
| Robert Bailey Plumbing & Heating Limited | Construction | 2008 |
| Robert Charles Construction Ltd | Construction | 2021 |
| Robert Charles Properties Limited | Real estate | 2020 |
| Robert Charles Property Development Ltd | Construction | 2006 |
| Robert Leonard (Nominees) Limited | Real estate | 1964 |
| Robert Leonard Developments Limited | Real estate | 1972 |
| Robert Leonard Estates Limited | Real estate | 1962 |
| Robert Leonard Group Limited | Real estate | 1962 |
| Robert Leonard Investments Limited | Real estate | 1962 |
| Robert Turner Associates Limited | Construction | 2006 |
| Roberts Grooming Doggy Day Care Centre Ltd | Other services | 2022 |
| Roberts RAW Animal Foods Ltd | Manufacturing | 2022 |
| Robins Tiling Limited | Construction | 2020 |
| Robinson Plumbing & Heating Supplies Limited | Construction | 2003 |
| Robinssons Carpentry Ltd | Construction | 2026 |
| Rocap Limited | Real estate | 2018 |
| Rock Falcon Limited | Other services | 2017 |
| Rock Hub Limited | Arts & recreation | 2022 |
| Rocket Art Limited | Manufacturing | 1998 |
| Rocket Growth Essex Ltd | Information & communication | 2020 |
| Rocket Poker Chips Ltd | Information & communication | 2021 |
| Rocking Horse Childcare Ltd | Administrative & support | 2022 |
| Rocking Horse Childcare Shoebury Ltd | Administrative & support | 2025 |
| Rodern Limited | Real estate | 1992 |
| Rolo Consulting Limited | Professional & scientific | 2020 |
| Roman Road Mountnessing Management Limited | Real estate | 2016 |
| Roman's Barbers Ltd | Other services | 2019 |
| Romans Mobile Barbers Ltd | Other services | 2025 |
| Romilly Holdings Ltd | Real estate | 2025 |
| Ronniegall Ltd | Information & communication | 2026 |
| Roofline Midlands Limited | Construction | 2026 |
| Rooftop Communications Limited | Real estate | 2005 |
| Rooftop Energy Limited | Extraterritorial | 2010 |
| Rooke Consulting Limited | Professional & scientific | 2015 |
| Rooley Park (Bradford) Management Company Limited | Households | 2014 |
| ROOT2SHOOT Greenkeeping Services Ltd | Administrative & support | 2013 |
| Rosa & BO Ltd | Wholesale & retail | 2024 |
| Rosclo Civils and Plant Hire Ltd | Construction | 2014 |
| Rosekelly Furniture Limited | Manufacturing | 2008 |
| Rosemead Farm (Horam) Management Company Limited | Households | 2019 |
| Rosemere Venue Ltd | Arts & recreation | 2026 |
| Roserail Inovation Ltd | Construction | 2025 |
| Rosewood Stair Company Ltd | Construction | 2023 |
| Rosewood Technical Services Limited | Information & communication | 2025 |
| Rosie-Loves Ltd | Wholesale & retail | 2020 |
| Ross Barbers Limited | Other services | 2014 |
| Ross Pipe Contractors Ltd | Construction | 2023 |
| Rossana's Limited | Hospitality | 2022 |
| Rossgolding Limited | Health & social care | 2011 |
| Round the World Vision Ltd | Information & communication | 2019 |
| ROUTE5 Ltd | Hospitality | 2014 |
| Rowe Miller Homes Limited | Real estate | 2016 |
| Rowling Gate (Phase 2) Management Company Limited | Households | 2005 |
| Roxannes Handmade Silicone Moulds Ltd | Manufacturing | 2021 |
| ROY Collins Limited | Construction | 2002 |
| Rp&C Developments Ltd | Real estate | 2024 |
| Rpicton Consult Ltd | Professional & scientific | 2014 |
| RS Automotive (Essex) Limited | Wholesale & retail | 2009 |
| RS Competition Cars Limited | Manufacturing | 2025 |
| RS Evolve Ltd | Professional & scientific | 2026 |
| RSA2UK Ltd | Other services | 2024 |
| RSX Details Limited | Wholesale & retail | 2024 |
| RTM Canvey Limited | Real estate | 2004 |
| Ruark Acoustics Limited | Extraterritorial | 1987 |
| Ruark Audio Limited | Wholesale & retail | 2001 |
| Ruby Creative Ltd | Professional & scientific | 2019 |
| Rude Notes Ltd | Wholesale & retail | 2025 |
| Rudford Housing CIC | Real estate | 2024 |
| Rufiorka Limited | Administrative & support | 2015 |
| Running Rings Electrical Services Ltd | Construction | 2024 |
| Rushton Services Ltd | Construction | 2020 |
| Russ Travers Limited | Construction | 2011 |
| Russo Coaching Ltd | Health & social care | 2024 |
| Ruston Building and Conservation Ltd | Construction | 2017 |
| Rustys Auto Garage Limited | Wholesale & retail | 2025 |
| Ruva Rose Ltd | Wholesale & retail | 2025 |
| Rvhr Consultancy Ltd | Administrative & support | 2024 |
| RW Rope Access Ltd | Administrative & support | 2020 |
| Ryan's Heating Ltd | Administrative & support | 2015 |
| Rydal Mount Ltd | Real estate | 2022 |
| Ryde Design Ltd | Information & communication | 2012 |