| Rims & Things Limited | Wholesale & retail | 2019 |
| Ripple HR Ltd | Administrative & support | 2018 |
| Ripple Recruitment Group Limited | Administrative & support | 2024 |
| Rise Performance Recovery Ltd | Arts & recreation | 2025 |
| Risk and Compliance Advisory Ltd | Professional & scientific | 2024 |
| Riversmead (Fradley Area 2) Management Company Limited | Households | 2003 |
| RJ Automotive Limited | Wholesale & retail | 2024 |
| RJL Management and Consulting Ltd | Information & communication | 2016 |
| RJS & Associates UK Ltd | Professional & scientific | 2009 |
| RJS Accountants Limited | Professional & scientific | 2024 |
| RK Wingers Ltd | Hospitality | 2026 |
| RKA Services (UK) Ltd | Extraterritorial | 2003 |
| RKO Ltd | Construction | 2022 |
| RKP Traders Limited | Hospitality | 2025 |
| RL (Ccwm) Ltd | Financial services | 2001 |
| RL Aldridge Ltd | Hospitality | 2023 |
| RLH Construction Limited | Construction | 2025 |
| RLS Tooling Limited | Manufacturing | 1989 |
| Rmbeinvestments Ltd | Professional & scientific | 2024 |
| Rmbks Limited | Real estate | 2022 |
| RMC Transport Limited | Transport & logistics | 2010 |
| RMD Services Limited | Administrative & support | 2018 |
| RML Advisory Limited | Professional & scientific | 2025 |
| RNJ Binns Limited | Agriculture & fishing | 2024 |
| RNJ CNC Machining Limited | Professional & scientific | 2024 |
| RNP Associates Limited | Professional & scientific | 2007 |
| RNP Steels Limited | Professional & scientific | 2014 |
| ROB Danks Company Ltd | Information & communication | 2009 |
| ROB Duncan Planning Consultancy Ltd | Professional & scientific | 2013 |
| ROB Lloyd (Midlands) Limited | Transport & logistics | 2020 |
| Robert Broad Travel Limited | Administrative & support | 2005 |
| Robert Brown Business Advice Ltd | Professional & scientific | 2012 |
| Robert Petre Transport Ltd | Transport & logistics | 2025 |
| Roberts Construction Services Limited | Professional & scientific | 2019 |
| Robinson Clarke Limited | Wholesale & retail | 2021 |
| Robotic and Automation Services Limited | Information & communication | 2022 |
| Robots Live Ltd | Arts & recreation | 2007 |
| Robson Lister (Ccwm) Limited | Financial services | 2012 |
| Robson Lister Oliver Limited | Financial services | 2003 |
| Robson Lister Reid Limited | Financial services | 2003 |
| Robson Lister Stait Limited | Financial services | 2006 |
| Roche FCA Ltd | Professional & scientific | 2014 |
| Rock Endeavours Limited | Professional & scientific | 2013 |
| Rockford Consulting Ltd | Professional & scientific | 2016 |
| Rocl Housing Limited | Real estate | 2005 |
| Rohit Sharma Ophthalmics Ltd | Health & social care | 2017 |
| Roman Park (Tring) Management Company Limited | Households | 2019 |
| Roman Truck Training Limited | Transport & logistics | 2021 |
| Roman Way Services Ltd | Real estate | 2018 |
| Romanza Limited | Wholesale & retail | 2021 |
| Rompol Bars UK Limited | Hospitality | 2020 |
| Romulus FC Academy Ltd | Education | 2020 |
| Romulus FC Limited | Arts & recreation | 2024 |
| Romulus Youth & Junior Limited | Arts & recreation | 2023 |
| Ronboo Trading Ltd | Financial services | 2024 |
| Ronin Corporate Services Limited | Professional & scientific | 2014 |
| Rose Aggregates (Corby) Limited | Construction | 2020 |
| Rose Recruitment and Technical Services Ltd | Administrative & support | 2011 |
| Rosealex Limited | Construction | 2015 |
| Roselea Day Centre Limited | Health & social care | 2021 |
| Rotate Dance Shoes Ltd | Wholesale & retail | 2012 |
| Rowe Group 23 Ltd | Real estate | 2023 |
| Rowe Group Limited | Real estate | 2023 |
| Roxane UK Limited | Wholesale & retail | 1993 |
| ROY Snelson Property Bureau Limited | Real estate | 1962 |
| Royale Rose Holdings Limited | Financial services | 2025 |
| Rozina Paint Limited | Construction | 2025 |
| RP Aquatics Ltd | Agriculture & fishing | 2020 |
| Rrdr Services Limited | Manufacturing | 2020 |
| RS Rendering Limited | Construction | 2014 |
| Rsaas Lets Ltd | Hospitality | 2026 |
| RSB Kitchens Limited | Manufacturing | 2013 |
| RSM 10 Limited | Real estate | 2025 |
| RT Media Solutions Ltd | Professional & scientific | 2025 |
| RT Services (Midlands) Ltd | Administrative & support | 2017 |
| RTL Building Services Ltd | Construction | 2025 |
| RTW Projects Limited | Construction | 2012 |
| Ruby RZH Ltd | Hospitality | 2024 |
| Rudolph & Hellmann Automotive Limited | Transport & logistics | 1999 |
| RUM Lime Sugar Limited | Professional & scientific | 2013 |
| Run PHP Ltd | Information & communication | 2018 |
| Ruralblend Limited | Hospitality | 2018 |
| Rushton Vale Ltd | Health & social care | 2013 |
| Rusts Limited | Wholesale & retail | 1978 |
| RVA Imperial Transport & Logistics Limited | Transport & logistics | 2019 |
| RY Akhtar Ltd | Administrative & support | 2021 |
| Ryan Heart Limited | Health & social care | 2015 |
| Rycroft Associates LLP | | 2003 |
| Rydale Installations Limited | Construction | 2023 |
| Rydan International Ltd | Manufacturing | 2010 |
| Ryder Barton Interiors Ltd | Construction | 2026 |
| Ryder Gardens (Bovingdon) Management Company Limited | Households | 2024 |
| Ryker Management Solutions Ltd | Financial services | 2018 |
| Ryknild Limited | Wholesale & retail | 2015 |
| Rzsl Limited | Professional & scientific | 2012 |
| S & C Property (Midlands) Ltd | Real estate | 2005 |
| S & G Accounting Ltd | Professional & scientific | 2020 |
| S & H Installations Limited | Manufacturing | 2014 |
| S & J Family Investments Limited | Construction | 2024 |
| S & J Plasterers Limited | Construction | 1993 |