| RHM Barbers Limited | Other services | 2025 |
| Rhmn Healthcare Limited | Health & social care | 2017 |
| Rhmn Motors Limited | Wholesale & retail | 2017 |
| Rhubarb Estates Ltd | Real estate | 2026 |
| Rhubarb Farm CIC | Agriculture & fishing | 2009 |
| Richard Jenkins & Sons Ltd | Construction | 2024 |
| Richard Parkes Photography Limited | Manufacturing | 2005 |
| Richards Motor Services Ltd | Wholesale & retail | 2008 |
| Richdom Limited | Information & communication | 2014 |
| Richmond Automotive Limited | Wholesale & retail | 2015 |
| Richmond Stationery Limited | Wholesale & retail | 2016 |
| Ride the Box Ltd | Transport & logistics | 2023 |
| Ridgeway Riding Limited | Arts & recreation | 2003 |
| Ridgewood Equestrian Limited | Agriculture & fishing | 2021 |
| RIG Services Limited | Mining & quarrying | 1990 |
| Right-Tech Engineering Limited | Manufacturing | 2013 |
| Rigid Software Design Limited | Information & communication | 2019 |
| Rildat Unnix Limited | Wholesale & retail | 2024 |
| Riley, Walton & Warnes Limited | Construction | 2011 |
| Rinnova Properties Ltd | Hospitality | 2023 |
| Rio's Pizza Takeaway Ltd | Administrative & support | 2017 |
| Rischer and Butler Ltd | Administrative & support | 2005 |
| Rise Houses CIC | Hospitality | 2019 |
| Rishilakshmi Ltd | Health & social care | 2013 |
| Ritual Donuts and Spirits Limited | Wholesale & retail | 2021 |
| Ritz Belper Limited | Information & communication | 2005 |
| Riverbank Driving Range Limited | Arts & recreation | 2025 |
| Rivercourt Investments Limited | Extraterritorial | 2022 |
| Riverside Chilli Ltd | Hospitality | 2020 |
| Riverside TCS Limited | Administrative & support | 2008 |
| RJ Electrical Nottingham Ltd | Construction | 2024 |
| RJB Property Services Limited | Construction | 2023 |
| RJD AI Solutions Limited | Information & communication | 2025 |
| RJH Fire & Security Ltd | Public administration | 2020 |
| RJM Electrical and Solar Limited | Construction | 2014 |
| RJS Automation Services Limited | Professional & scientific | 2021 |
| RK Homes Ltd | Real estate | 2017 |
| Rkgproperties Limited | Real estate | 2024 |
| Rklg Consulting Ltd | Professional & scientific | 2024 |
| RL GAS Services Ltd | Construction | 2021 |
| RL Hammond Plumbing & Heating Limited | Construction | 2019 |
| RL Technical Services Ltd | Professional & scientific | 2025 |
| Rlktransport Limited | Transport & logistics | 2025 |
| RM Installations (Nationwide) Limited | Construction | 2013 |
| RMB Electrical (Mansfield) Limited | Construction | 2025 |
| Rmla Holdings Ltd | Other services | 2021 |
| RMS Mansfield Ltd | Wholesale & retail | 2025 |
| RMT Contract Limited | Construction | 2025 |
| RNS Construction Services Limited | Construction | 2025 |
| Road to Success Consultancy Limited | Other services | 2021 |
| Roast Events Limited | Hospitality | 2014 |
| ROB Gill Football and Mentoring Limited | Education | 2025 |
| Robert Woodhead Holdings Limited | Financial services | 1983 |
| Robin Down Court Management Company Limited | Real estate | 2001 |
| Robin Hood Consulting Limited | Financial services | 2016 |
| Robin House Developments Ltd | Real estate | 2022 |
| Robin Transport (Mansfield) Ltd | Transport & logistics | 2024 |
| Robinhood of Sherwood Forest Holiday Lettings Ltd | Hospitality | 2023 |
| Robus Energy Limited | Construction | 2013 |
| Rock Charitable Trust | Health & social care | 2006 |
| Rocket Scenery Limited | Arts & recreation | 2003 |
| Rocket Stage Rentals Ltd | Arts & recreation | 2017 |
| Rockside Engineering Ltd | Construction | 2025 |
| Rockside Properties Ltd | Hospitality | 2025 |
| Rocky's Residential Ltd | Real estate | 2019 |
| Rogers Rail Ltd | Construction | 2019 |
| Rolfe Electrical Contractors Limited | Construction | 2001 |
| Rollink LLP | | 2009 |
| ROM DAN Construction Ltd | Construction | 2019 |
| ROM Rendering Ltd | Construction | 2025 |
| Roman Blind Wizard Limited | Manufacturing | 2011 |
| Roman Rush Ltd | Transport & logistics | 2025 |
| Roman Szeja Ltd | Transport & logistics | 2017 |
| Romeo Service Limited | Wholesale & retail | 2022 |
| Rona Holdings Limited | Financial services | 2000 |
| Roob Contracting Limited | Construction | 2018 |
| Roobeau Ltd | Construction | 2021 |
| Roof Clad Design Limited | Professional & scientific | 2022 |
| Roof Investigations Ltd | Construction | 2000 |
| Roof Raiders Ltd | Construction | 2024 |
| Roofrays Ltd | Construction | 2023 |
| Roofsan Ltd | Construction | 2025 |
| Roosevelt Management Company Limited | Professional & scientific | 1991 |
| Root 2 Reef Ltd | Wholesale & retail | 2026 |
| ROOT9 Limited | Education | 2017 |
| Roots Enriched Ltd | Wholesale & retail | 2021 |
| Rope Access Contractor (.Co.Uk) Ltd | Construction | 2025 |
| Rortech Partners Ltd | Information & communication | 2026 |
| Rory Goddard Kitchens Limited | Manufacturing | 2016 |
| Rosa Cristina Avecillas Mendez Ltd | Extraterritorial | 2024 |
| Rose Transmissions Ltd | Wholesale & retail | 2018 |
| Rosemead Stores Limited | Wholesale & retail | 2020 |
| Rosewood Developments Ltd | Real estate | 2022 |
| Rosmini Publications Limited | Other services | 2017 |
| Ross Carlin Ltd | Professional & scientific | 2025 |
| Rossabees Limited | Manufacturing | 2021 |
| Rossini's Restaurant Limited | Hospitality | 2020 |
| Rossmore Convenience Store Limited | Wholesale & retail | 2025 |
| Rotel Leisure Limited | Hospitality | 1984 |
| Roua Transport Limited | Transport & logistics | 2026 |