| Rescomm Solutions Ltd | Real estate | 2025 |
| Research & Development Systems Limited | Professional & scientific | 1997 |
| Resicom Limited | Construction | 2001 |
| Residentia 101 Ltd | Real estate | 2017 |
| Residential Leases Limited | Real estate | 1983 |
| Residential Tenancies Limited | Real estate | 1995 |
| Resilience Psychological Services Ltd | Health & social care | 2015 |
| Resilience State Studios Ltd | Information & communication | 2026 |
| Resolute Network CIC | Health & social care | 2023 |
| Resolute Precision Engineering Ltd | Professional & scientific | 2025 |
| Resolution Property Maintenance Ltd | Construction | 2019 |
| Resolve Facility Management Ltd | Construction | 2024 |
| Resolve Management Solutions Limited | Financial services | 2016 |
| Resolve Unit Ltd | Information & communication | 2026 |
| Resources (N E) Limited | Education | 2008 |
| Responsive Engineering Limited | Manufacturing | 2002 |
| Responsive Housing Management Limited | Real estate | 2018 |
| Ress Furniture Limited | Manufacturing | 2020 |
| Restaurant Management Limited | Hospitality | 1995 |
| Restaurant Pine Limited | Manufacturing | 2019 |
| Restonation Ltd | Wholesale & retail | 2022 |
| Restoraffle Ltd | Arts & recreation | 2024 |
| Restoration Church | Other services | 2016 |
| Restricted Access Ltd | Wholesale & retail | 2025 |
| Retail Displays Ltd | Manufacturing | 2025 |
| Retatrue Ltd | Wholesale & retail | 2026 |
| Retire Right Limited | Information & communication | 2023 |
| Retox Digital Limited | Other services | 2010 |
| Retrac Composites Limited | Manufacturing | 1998 |
| Retrac Technologies Ltd | Professional & scientific | 2024 |
| Retreat Solutions Ltd | Arts & recreation | 2019 |
| Retro Comfort Limited | Hospitality | 2026 |
| Retro Trader Ltd | Wholesale & retail | 2022 |
| Reuss Consulting Limited | Information & communication | 2019 |
| REV Culture Ltd | Wholesale & retail | 2026 |
| Revarose Ltd | Other services | 2023 |
| Revayah Properties Limited | Real estate | 2025 |
| Reveal Kits Ltd | Wholesale & retail | 2026 |
| Reveela Technologies Limited | Information & communication | 2019 |
| Revel Street Ltd | Information & communication | 2021 |
| Revela Health Limited | Information & communication | 2023 |
| Reveyes & Conquer Ltd | Education | 2023 |
| Revilo Civils Limited | Construction | 2024 |
| Revive Psychological Services Ltd | Health & social care | 2021 |
| Revive RX Solutions Ltd | Health & social care | 2023 |
| Revive Your Soul CIC | Other services | 2026 |
| Revol (Newcastle) Limited | Manufacturing | 1976 |
| Revolution Leasing Ltd | Wholesale & retail | 2024 |
| Revolutionairey Limited | Real estate | 2020 |
| Revotech Group Ltd | Manufacturing | 2016 |
| Revso Limited | Construction | 2024 |
| Rewe 5 Limited | Energy | 2021 |
| Reyes & Reyes Ltd | Health & social care | 2023 |
| Reynolds and SON Property Developments Limited | Construction | 2022 |
| Reyrolle Parsons Automation Limited | | 1936 |
| Rez’S Razors Limited | Other services | 2025 |
| RF Plumbing Services Limited | Construction | 2025 |
| RF Retail Limited | Real estate | 2018 |
| RF14 Investments Limited | Financial services | 2024 |
| RFF Marine Ltd | Professional & scientific | 2020 |
| RFP 1 Limited | Real estate | 2019 |
| RFP 2 Limited | Real estate | 2019 |
| RFP 3 Limited | Real estate | 2019 |
| RFR Accountants Ltd | Professional & scientific | 2025 |
| RG Auditors Limited | Extraterritorial | 2021 |
| RG North East Audit LLP | | 2020 |
| RG North East Limited | Financial services | 2022 |
| RG Property Restoration Services Ltd | Manufacturing | 2018 |
| RGI Marine Limited | Transport & logistics | 2021 |
| RGL Property Portfolio Ltd | Real estate | 2025 |
| RGS Trading Limited | Wholesale & retail | 2000 |
| RH ENG Ltd | Manufacturing | 2012 |
| RH Holdings SPV1 Ltd | Real estate | 2018 |
| RH Holdings SPV2 Ltd | Real estate | 2020 |
| RHF Leisure Ltd | Hospitality | 2015 |
| RHH NE LLP | | 2022 |
| RHO Factor Consulting Ltd | Professional & scientific | 2024 |
| RIA Group Limited | Real estate | 2020 |
| Rialto (Ponteland) Ltd | Hospitality | 2025 |
| Rialto North Limited | Hospitality | 2017 |
| Ribchester Smith & Law Limited | Professional & scientific | 2013 |
| Ribs by Ginge Ltd | Hospitality | 2024 |
| Riccarl Consulting Services Ltd | Professional & scientific | 2024 |
| Ricemans (Canterbury) Limited | Professional & scientific | 1951 |
| Ricemans (Holdings) Limited | Professional & scientific | 1961 |
| Ricemans Limited | Professional & scientific | 1950 |
| Rich & Plenty Records Ltd. | Arts & recreation | 2022 |
| Rich Asthetic Limited | Wholesale & retail | 2025 |
| Rich Developments (NE) Ltd | Construction | 2018 |
| Rich Leisure Ltd | Hospitality | 2020 |
| Rich Survey Services Limited | Professional & scientific | 2024 |
| Richard Hughes Industrial Flooring Ltd | Manufacturing | 2012 |
| Richard Mahoney Ltd | Other services | 2002 |
| Richard Oliver Engineering Limited | Professional & scientific | 2019 |
| Richard Rosborough Broadcast Services Ltd | Information & communication | 2006 |
| Richard Ruddick Architecture Ltd | Professional & scientific | 2016 |
| Richard Tulip Enterprises Limited | Hospitality | 2011 |
| Richard-Louis Trading Company Ltd | Wholesale & retail | 2011 |
| Richards Heating Services Ltd | Construction | 2019 |
| Richardson Hall Kennedy & Co Limited | Real estate | 1997 |