| Rjag Consulting Ltd | Professional & scientific | 2021 |
| RJB Dynamics Ltd | Professional & scientific | 2011 |
| RJB Fencing Contractors (Durham) Ltd | Construction | 2024 |
| RJS Bulk Solutions Ltd | Agriculture & fishing | 2015 |
| RLA Properties Ltd | Real estate | 2025 |
| Rlangleyarts Limited | Real estate | 2019 |
| RLD Legal Services Limited | Administrative & support | 2020 |
| Rlet Limited | Financial services | 2021 |
| RM Convenience Ltd | Wholesale & retail | 2024 |
| Rmac Heating & Plumbing Ltd | Construction | 2021 |
| Rmbdistribution Ltd | Wholesale & retail | 2024 |
| RMS (Repair and Maintenance Suppliers) Ltd | Other services | 2015 |
| RMS Retail Limited | Wholesale & retail | 2017 |
| RMZ Automotive Group Limited | Wholesale & retail | 2026 |
| RN Jade Ltd | Information & communication | 2022 |
| Roadsafe Traffic Management (North West) Ltd | Construction | 2024 |
| Robert Booth Computing Services Limited | Information & communication | 1998 |
| Roberts Accountants and Advisors Ltd | Professional & scientific | 2013 |
| Robinson Project Management Limited | Construction | 2026 |
| Robinson Williams Recruitment Ltd | Professional & scientific | 2019 |
| Robinsons Durham Limited | Real estate | 2012 |
| Roborna Therapeutics Ltd | Manufacturing | 2026 |
| Roboveso Ltd | Information & communication | 2026 |
| Robson Solutions (NE) Ltd | Administrative & support | 2020 |
| Rocca Investments Limited | Real estate | 2024 |
| Rocca Properties Ltd | Real estate | 2015 |
| Rocco’S Delicatessen Ltd | Hospitality | 2023 |
| Rocfuel Limited | Wholesale & retail | 2007 |
| Rochfords Garages Limited | Wholesale & retail | 1998 |
| Rochfords Group Holdings Ltd | Financial services | 2024 |
| Rock Farm Storage Limited | Transport & logistics | 2019 |
| Rocking Horse Rehearsal Rooms Ltd | Arts & recreation | 2015 |
| Rocpower Limited | Energy | 2007 |
| Rodridge Limited | Construction | 2025 |
| Roebuck Horticultural Limited | Agriculture & fishing | 2020 |
| Roffe's Belmont Cottage Ltd | Real estate | 2026 |
| ROH Supplies Limited | Wholesale & retail | 2025 |
| Rojbin Store Ltd | Wholesale & retail | 2026 |
| ROK (Opco) Exeter Limited | Construction | 2024 |
| ROK Exeter LLP | | 2024 |
| ROK Group (Exeter) Limited | Construction | 2017 |
| ROK Holdco (Exeter) Limited | Financial services | 2024 |
| ROK Propco (Exeter) Limited | Construction | 2024 |
| ROK Property Ltd | Construction | 2011 |
| ROKER25 Limited | Information & communication | 2025 |
| Romanway Woodfuels Ltd | Administrative & support | 2013 |
| Rome Building Services Limited | Construction | 2022 |
| Rooms to LET NE Limited | Households | 2022 |
| Root Cause Consultancy Limited | Professional & scientific | 2003 |
| Roots Alternative Education CIC | Education | 2026 |
| Roots of India Ltd | Hospitality | 2017 |
| Rope Access & Specialist Coatings Services Ltd | Construction | 2024 |
| Rory Studio CIC | Arts & recreation | 2024 |
| Rose Arches Group Ltd | Hospitality | 2025 |
| Rose Residential Lettings Ltd | Real estate | 2026 |
| Rose Tree Associates Limited | Hospitality | 2005 |
| Rose Tree PUB Company Limited | Hospitality | 2021 |
| Rosemount Properties NE Limited | Real estate | 2020 |
| Roundel Technologies Limited | Administrative & support | 2015 |
| Roundtuit Limited | Other services | 2015 |
| Routledge Group Limited | Real estate | 2024 |
| Routledge Group Property Investments Ltd | Financial services | 2026 |
| Rowan Studios Limited | Manufacturing | 2002 |
| Roxy Film & Media Ltd | Information & communication | 2025 |
| Royel 26 Worldwide Ltd | Hospitality | 2026 |
| Royyal Estate Limited | Real estate | 2026 |
| RPG Medical Limited | Wholesale & retail | 2016 |
| RR (NE) Ltd | Health & social care | 2018 |
| RRM Civils NE Ltd | Construction | 2020 |
| RRV Fish Bar Ltd | Hospitality | 2025 |
| RS Building Surveys Ltd | Professional & scientific | 2025 |
| RS Civils International Limited | Construction | 2025 |
| RS Footings Ltd | Construction | 2024 |
| RSB Projects Limited | Professional & scientific | 2009 |
| RSG Holdings Limited | Financial services | 2020 |
| RSL Service and Repairs Ltd | Wholesale & retail | 2020 |
| RSM Trade Limited | Wholesale & retail | 2025 |
| RST Fitness Limited | Arts & recreation | 2016 |
| RT Fitness Limited | Arts & recreation | 2012 |
| RTL Property Services Limited | Households | 2024 |
| RTS Automotive Ltd | Wholesale & retail | 2026 |
| Rubber Shark Creative Limited | Information & communication | 2011 |
| Rubbish Energy Limited | Energy | 2022 |
| Rubee Digital Limited | Administrative & support | 2019 |
| Rubicon Corporate Finance Limited | Financial services | 2016 |
| Rubicon Solutions Limited | Financial services | 2015 |
| Ruby Civils Ltd | Construction | 2022 |
| Ruby Winning Limited | Hospitality | 2025 |
| Rudchester Estates Limited | Financial services | 2022 |
| Rugby Rockstars CIC | Arts & recreation | 2024 |
| Ruglooks Ltd | Wholesale & retail | 2024 |
| RUI Long Catering Limited | Hospitality | 2020 |
| Runaway Suites Ltd | Real estate | 2026 |
| Runciecare Ltd | Health & social care | 2021 |
| Rural Link Ltd | Transport & logistics | 2018 |
| Ruskin Blackpool Limited | Administrative & support | 2017 |
| Russet Engineering Limited | Professional & scientific | 2017 |
| Rvlv Group Ltd | Transport & logistics | 2025 |
| RWS Renewables Ltd | Construction | 2026 |
| Ryan Edwards Videography Ltd | Information & communication | 2023 |