| Richardson Landscape Gardening Ltd | Administrative & support | 2025 |
| Richardsons Contracts Limited | | 1983 |
| Richlieu Medical Limited | Information & communication | 2017 |
| Richmond Court Management (1997) Limited | Real estate | 1997 |
| Richmond House Holdings Ltd | Professional & scientific | 2015 |
| Richmond Lodge Maintenance Limited | Households | 1988 |
| Richmond Property Consultancy Limited | Real estate | 2011 |
| Richmond UK Bidco Limited | Financial services | 2016 |
| Richmond UK Holdco Limited | Financial services | 2016 |
| Richmond UK Top Holdco Limited | Financial services | 2016 |
| Richoux Langham Place Limited | Hospitality | 2025 |
| Richy Lamb Heating Ltd | Construction | 2022 |
| Rickaz Rope Access Solutions Ltd | Other services | 2022 |
| Rico's Tattoo & Artist Supplies Ltd | Manufacturing | 2025 |
| Ridaw Limited | Manufacturing | 2013 |
| Riddle Energy Ltd | Wholesale & retail | 2026 |
| Rider Hunt (Newcastle) Limited | Professional & scientific | 2013 |
| Ridge Court Management Company Limited | Households | 1966 |
| Ridgeway Property Group Limited | Real estate | 2016 |
| Ridley Howe Ltd | Health & social care | 2016 |
| Ridley Property Ltd | Real estate | 2025 |
| Riesa Renewable Energy Limited | Energy | 2014 |
| Right Nuisance Publishing Limited | Administrative & support | 2018 |
| Right Path Management Consultancy Limited | Administrative & support | 2018 |
| Right-Trak Limited | Health & social care | 2006 |
| Rightbuild Construction (N.E.) Ltd | Construction | 2024 |
| Rightbuild Construction (North East) Ltd | Construction | 2003 |
| Rightox Ltd | Wholesale & retail | 2020 |
| Rigmax Ltd | Professional & scientific | 2019 |
| Rigtech Inspection Limited | Mining & quarrying | 2025 |
| Riley's Fish Limited | Wholesale & retail | 2019 |
| Rilox Industrial Doors Limited | Construction | 2015 |
| Rimby Property Ltd | Real estate | 2023 |
| Rimcs Ltd | Real estate | 2018 |
| Rimside Maintenance Limited | Households | 1965 |
| Ringhawk 2022 Limited | Manufacturing | 1989 |
| Rington Court Management Limited | Real estate | 2000 |
| Ringtons Branded Opportunities Limited | Wholesale & retail | 2008 |
| Ringtons Cafes Limited | Wholesale & retail | 2008 |
| Ringtons Foundation Limited | Professional & scientific | 1978 |
| Ringtons Franchising Limited | Wholesale & retail | 2010 |
| Ringtons High Street Opportunities Limited | Wholesale & retail | 2008 |
| Ringtons Holdings Limited | Manufacturing | 1987 |
| Ringtons Investments Limited | Financial services | 2024 |
| Ringtons Limited | Wholesale & retail | 1956 |
| Ringtons Retail Stores Limited | Wholesale & retail | 2008 |
| Ringtons Stores Limited | Wholesale & retail | 2005 |
| Ringtons Trading Limited | Financial services | 2024 |
| RIO Property Solutions Ltd | Real estate | 2021 |
| Ripley Medical Ltd | Health & social care | 2019 |
| Ripon Interiors Limited | Wholesale & retail | 2001 |
| Ripped Kitchen Ltd | Hospitality | 2021 |
| Rippon Psychiatry Limited | Health & social care | 2016 |
| Risdyn (UK) Ltd | Professional & scientific | 2007 |
| Rise Above Scaffolding & Access Ltd | Construction | 2023 |
| Rise Above Wrestling CIC | Education | 2023 |
| Rise and Shine Bakery Ltd | Manufacturing | 2010 |
| Rise Developments North East Ltd | Construction | 2024 |
| Rise Plumbing and Heating Limited | Construction | 2025 |
| Risi's Ices Limited | Hospitality | 1966 |
| Rising Edge Automation Ltd | Information & communication | 2025 |
| Rising IT Solutions Limited | Information & communication | 2026 |
| Rising Stars Properties Limited | Real estate | 2022 |
| Rising Sun Farm Trading Company Limited | Agriculture & fishing | 1991 |
| Risk Managers Limited | Financial services | 2017 |
| Risk Rope & Rescue Ltd | Construction | 2026 |
| RISLAM7 Pharm Limited | Health & social care | 2023 |
| Ritchie Transport Hetton-Le-Hole Ltd | Transport & logistics | 2019 |
| Rivah Care Ltd | Health & social care | 2023 |
| Rival Ltd | Wholesale & retail | 2016 |
| Rivalmerge Property Management Limited | Households | 1992 |
| River and Stone Estates Ltd | Real estate | 2025 |
| River Capital Properties Limited | Real estate | 2018 |
| River Meadow (Wark) Management Company Limited | Households | 2022 |
| River Scaffolding Limited | Construction | 2024 |
| River Tyne Scaffolding Ltd | Construction | 2022 |
| Riverdale Apartments Management Co. Limited | Real estate | 2008 |
| Riverdale Ltd | Information & communication | 2024 |
| Riverline Aspects Limited | Households | 2004 |
| Riverside (Barnard Castle) Management Ltd | Households | 2016 |
| Riverside Community Health Project | Health & social care | 1993 |
| Riverside Corner Shop Ltd | Wholesale & retail | 2025 |
| Riverside Developments NE Chester LE ST Ltd | Real estate | 2023 |
| Riverside Developments NE Ltd | Real estate | 2023 |
| Riverside Plant & Truck Hire Limited | Transport & logistics | 1999 |
| Riverside Studios (11/12) Ltd | Real estate | 2018 |
| Riverside Wealth Limited | Financial services | 2014 |
| Riverview Bakery Ltd | Manufacturing | 2018 |
| Riverview Community Group Ltd | Health & social care | 2024 |
| Riverview Community Kindergarten Community Interest Company | Education | 2013 |
| Riverwalk Stakeford Management Limited | Real estate | 2006 |
| Rivet Cloud Hosting Limited | Information & communication | 2025 |
| Rivtos Limited | Information & communication | 2025 |
| Rivus Technology Limited | Professional & scientific | 2003 |
| Riya Retail Ltd | Wholesale & retail | 2025 |
| RJ Property Renovations Ltd | Construction | 2026 |
| RJ Suppliers Ltd | Health & social care | 2023 |
| RJ Thompson Ltd | Arts & recreation | 2025 |
| RJ Wind Services Ltd | Construction | 2023 |
| Rjak Holdings Ltd | Financial services | 2025 |