| Rock Interiors Ltd | Administrative & support | 2013 |
| Rock of Redemption CIC | Other services | 2023 |
| Rock Solid Property Group Ltd | Real estate | 2025 |
| Rockchase Sports Ltd | Wholesale & retail | 2020 |
| Rocket Berry Ltd | Professional & scientific | 2023 |
| Rocket Bridge Limited | Other services | 2014 |
| Rocket Chilli Ltd | Hospitality | 2024 |
| Rocket Cleaning Services Ltd | Administrative & support | 2025 |
| Rockwell Consult Ltd | Professional & scientific | 2007 |
| Rodeosect Pest Control Services Ltd | Health & social care | 2011 |
| Rodeosect Pest Control Limited | Administrative & support | 2025 |
| Rodizio Limited | Hospitality | 2017 |
| Rodri Comms Ltd | Information & communication | 2014 |
| Rogenesis Limited | Information & communication | 2018 |
| Rohaan Traders Ltd | Wholesale & retail | 2026 |
| Rohannah Solar Energy Management Ltd | Energy | 2024 |
| Rohen and Hall Ltd | Construction | 2024 |
| Rohtas Housing Limited | Real estate | 2021 |
| Rohtas Limited | Information & communication | 2017 |
| Roja Hygiene Ltd | Other services | 2021 |
| Rojites Limited | Professional & scientific | 2014 |
| Rojo Cosmetics UK Ltd | Manufacturing | 2023 |
| Rojo's Electrical Services Limited | Construction | 2015 |
| ROK Protection Group Ltd | Other services | 2023 |
| Rokan KRD Ltd | Wholesale & retail | 2025 |
| Roketskyy Ltd | Construction | 2023 |
| Rolandas S Services Ltd | Construction | 2025 |
| Rolis Logistics Ltd | Transport & logistics | 2017 |
| Rollene Marketing & Sales Ltd | Wholesale & retail | 2018 |
| Rolls Park Developments Limited | Construction | 2010 |
| Rollysmllan Limited | Health & social care | 2015 |
| Rolmax Capital Limited | Administrative & support | 2022 |
| Roma Jewellers Ltd | Manufacturing | 2025 |
| Roman Asset Holdings Limited | Real estate | 2026 |
| Roman Homes Development Ltd | Real estate | 2025 |
| Roman Tavast Ltd | Manufacturing | 2014 |
| Roman Ventures Limited | Construction | 2023 |
| Roman-Chauffeuring Ltd | Transport & logistics | 2020 |
| Romanoff Atelier Ltd | Wholesale & retail | 2021 |
| Romanoff Properties Ltd | Financial services | 2023 |
| Romatessuto Ltd | Wholesale & retail | 2026 |
| Romford & Gidea Park Rugby Football Club Ltd | Arts & recreation | 2010 |
| Romford Access Solutions Ltd | Construction | 2026 |
| Romford Auto Services Ltd | Wholesale & retail | 2010 |
| Romford B2B Services Limited | Real estate | 2025 |
| Romford Barbers Ltd | Other services | 2026 |
| Romford Cafe Ltd | Hospitality | 2023 |
| Romford Car Repairs Ltd | Professional & scientific | 2009 |
| Romford Cleaning Ltd | Other services | 2024 |
| Romford Cleaning Services Ltd | Administrative & support | 2021 |
| Romford Digital Ltd | Information & communication | 2019 |
| Romford Education Consultants & Tech Solutions Limited | Education | 2018 |
| Romford Education Hub Ltd | Education | 2023 |
| Romford Emergency Plumber Ltd | Construction | 2018 |
| Romford Events Ltd | Real estate | 2024 |
| Romford Fencing and Landscaping Limited | Administrative & support | 2020 |
| Romford Fencing Ltd | Construction | 2017 |
| Romford Fencing Supplies Limited | Manufacturing | 2018 |
| Romford Film Limited | Information & communication | 2024 |
| Romford Fish and Chips Ltd | Hospitality | 2025 |
| Romford Fish Limited | Wholesale & retail | 2020 |
| Romford Gold Limited | Other services | 2024 |
| Romford Golf Club Limited(The) | Arts & recreation | 1920 |
| Romford Grill Ltd | Hospitality | 2025 |
| Romford Headlease Company Limited | Real estate | 2023 |
| Romford HK Barbers Ltd | Other services | 2023 |
| Romford Holdings UK Ltd | Real estate | 2025 |
| Romford Homecare Limited | Health & social care | 2018 |
| Romford Lodge Ltd | Hospitality | 2024 |
| Romford Ltd | Extraterritorial | 2018 |
| Romford Mart Ltd | Wholesale & retail | 2023 |
| Romford Minicabs Ltd | Extraterritorial | 2022 |
| Romford MOT Ltd | Wholesale & retail | 2025 |
| Romford Motor Group Ltd | Wholesale & retail | 2025 |
| Romford Motors Ltd | Wholesale & retail | 2021 |
| Romford Plumbing & Heating Ltd | Construction | 2018 |
| Romford Poppins Ltd | Hospitality | 2009 |
| Romford Private Hire Limited | Transport & logistics | 2017 |
| Romford Properties SPV Limited | Real estate | 2017 |
| Romford Rock and Boulder Ltd | Arts & recreation | 2019 |
| Romford Roofing Limited | Construction | 2025 |
| Romford Sandwich Ltd | Hospitality | 2025 |
| Romford Scaffolding UK Ltd | Construction | 2017 |
| Romford Securities Limited | Other services | 1975 |
| Romford Security Ltd | Administrative & support | 2020 |
| Romford Stars Ltd | Hospitality | 2025 |
| Romford Startup Hub Ltd | Financial services | 2022 |
| Romford Supermarket Ltd | Wholesale & retail | 2014 |
| Romford Tailoring Ltd | Manufacturing | 2024 |
| Romford Town Management Partnership Limited | Other services | 2016 |
| Romford Traditional Barbers Ltd | Other services | 2023 |
| Romford Vape Shop Ltd | Wholesale & retail | 2026 |
| Romstal Limited | Construction | 2023 |
| Ronnies Care Limited | Health & social care | 2017 |
| Ronx Ltd | Health & social care | 2021 |
| Roops Ltd | Information & communication | 2016 |
| Roosh Limited | Construction | 2014 |
| Rooster Builders & Windows Ltd | Construction | 2022 |
| Rooster Film and Television Limited | Information & communication | 2005 |
| Rooster Piri Grill Guilford Limited | Hospitality | 2025 |