| RJR Theatre Schools Ltd | Education | 2020 |
| RJS Camper Van Conversions Ltd | Wholesale & retail | 2010 |
| Rjwalker Limited | Construction | 2008 |
| RKJ Properties Ltd | Real estate | 2018 |
| RL Scott Ltd | Hospitality | 2024 |
| RLA Solutions Ltd | Administrative & support | 2022 |
| RM Billacombe Limited | Hospitality | 2025 |
| RM Career Consultancy Ltd | Administrative & support | 2023 |
| RM Legal Support Ltd | Administrative & support | 2022 |
| RM SR Ltd | Real estate | 2023 |
| RM Wash Ltd | Wholesale & retail | 2025 |
| RM5 Lounge Ltd | Hospitality | 2018 |
| Rmac Logistics NW Ltd | Transport & logistics | 2025 |
| RMC Bookkeeping Solutions Ltd | Professional & scientific | 2018 |
| RMC Offshore Inspection Ltd | Other services | 2018 |
| Rmd-It Ltd | Information & communication | 2015 |
| RMK Services Ltd | Health & social care | 2025 |
| RMP & Sons Ltd | Real estate | 2019 |
| Rmtm Ltd | Construction | 2018 |
| RMW Contract Cleaning Limited | Households | 2003 |
| RMW Property & Sons Ltd | Real estate | 2022 |
| RN Cosmedics Ltd | Wholesale & retail | 2022 |
| RNA Agribio Limited | Professional & scientific | 2021 |
| RNM Property Ltd | Construction | 2018 |
| RNR 2023 Ltd | Real estate | 2023 |
| RNR Plymouth Ltd | Hospitality | 2024 |
| Roadintel Ltd | Information & communication | 2026 |
| Roam Brewing Company Ltd | Manufacturing | 2015 |
| Roam Holdings (SW) Limited | Financial services | 2026 |
| Roam Properties Limited | Real estate | 2022 |
| Roast Coffee Limited | Wholesale & retail | 2012 |
| Roast Rider Ltd | Hospitality | 2025 |
| ROB Attridge Decorating Limited | Construction | 2020 |
| ROB Bradbury Autos Ltd | Wholesale & retail | 2025 |
| Robert James Munroe & Matthew Fellowes Consulting Limited | Real estate | 2022 |
| Robert Putt Technology Ltd. | Information & communication | 2021 |
| Robins + Robins Ltd | Wholesale & retail | 2023 |
| Robinson Investment Property Ltd | Real estate | 2026 |
| Robinson Ventures Limited | Real estate | 2024 |
| Roborough Engineering Limited | Manufacturing | 1980 |
| Roborough Investments Limited | Construction | 1968 |
| Robotics Ltd | Manufacturing | 2026 |
| Robs Bait & Tackle Supplies Mail Order Limited | Wholesale & retail | 2016 |
| ROC & Co Developments Ltd | Construction | 2023 |
| Rochelles River Café Ltd | Hospitality | 2016 |
| Rocicorp Ltd | Manufacturing | 2025 |
| Rock Bottom Crystals Limited | Wholesale & retail | 2024 |
| Rock Level Limited | Information & communication | 2008 |
| Rock Oyster Media Productions Ltd | Information & communication | 2019 |
| Rock Salt Enterprises Limited | Real estate | 2015 |
| Rock Solid Products Limited | Professional & scientific | 2008 |
| Rock-N-Roll Rewind Radio Ltd | Information & communication | 2022 |
| Rockdale Field Management Company Limited | Agriculture & fishing | 2004 |
| Rocket Digital Ltd | Information & communication | 2026 |
| Rockfituk Ltd | Arts & recreation | 2021 |
| Rockyhut Limited | Wholesale & retail | 2019 |
| Rockys (Plymouth) Limited | | 1985 |
| Rocky’S Fish Bar Ltd | Hospitality | 2023 |
| Rocnorth Limited | Administrative & support | 1997 |
| Roco SW Limited | Wholesale & retail | 2020 |
| Rodgers of Plymouth Limited | Wholesale & retail | 1981 |
| Rodgman & Williams Limited | Wholesale & retail | 1999 |
| Roger Smith Skilled Services Ltd | Other services | 2005 |
| Rogers Decorating Service Ltd | Construction | 2025 |
| Rogers Decorators Limited | Construction | 2016 |
| Roger`S Barber Shop Limited | Other services | 2003 |
| Rolling Brew Co. Ltd | Hospitality | 2024 |
| Rolmor Ltd | Professional & scientific | 2025 |
| Roluja Ltd | Real estate | 2026 |
| Roman Industries Limited | Construction | 2013 |
| Roman Lion Limited | Wholesale & retail | 2021 |
| Romanians Voice Radio Ltd | Information & communication | 2023 |
| Romdale Properties Limited | Real estate | 2004 |
| Romed Care Services Ltd | Health & social care | 2026 |
| Romeo Pizza (SW) Limited | Hospitality | 2025 |
| Ronald Martin (Butchers) Limited | Wholesale & retail | 1944 |
| Rondar Limited | Professional & scientific | 2003 |
| Roninsteel Ltd | Construction | 2019 |
| Ronnoco (UK) Limited | Hospitality | 2001 |
| Roods Landfill Limited | Water & waste | 1998 |
| Roof Upgrades Ltd | Construction | 2019 |
| Roofworks SW Ltd | Construction | 2025 |
| Roomease Limited | Real estate | 2023 |
| Roomsmiths Ltd | Arts & recreation | 2016 |
| Rooney Social Work Services Ltd | Health & social care | 2016 |
| Roopnogar Limited | Hospitality | 2012 |
| Rooted Evolution Ltd | Health & social care | 2025 |
| Roots and Rentals Property Solutions Ltd | Real estate | 2025 |
| Roots to Rise CIC | Other services | 2023 |
| Roots Transformation Ltd | Administrative & support | 2018 |
| Rope Access Systems UK Ltd | Professional & scientific | 2006 |
| Roper James Investments Limited | Real estate | 2013 |
| Roper James Limited | Public administration | 2010 |
| Rory Lewis Photographer Studio Limited | Professional & scientific | 2013 |
| Rose & Ruby Ltd | Arts & recreation | 2010 |
| Rose Driveways Limited | Construction | 2014 |
| Rose Group Holdings Limited | Arts & recreation | 2021 |
| Rosed Trading Ltd | Wholesale & retail | 2023 |
| Rosehill Management Company (Saltash) Limited | Households | 1988 |
| Roselyon Limited | Health & social care | 2025 |