| RJJ York Limited | Financial services | 2026 |
| RJY Consulting Ltd | Professional & scientific | 2022 |
| RK Building Solutions Ltd | Construction | 2012 |
| Rkhp Ltd | Professional & scientific | 2023 |
| RKT Labs Ltd | Manufacturing | 2025 |
| RL Dental Limited | Health & social care | 2023 |
| RLB Admin Services Limited | Administrative & support | 2022 |
| RLH Logistics Limited | Transport & logistics | 2018 |
| RLJ Group Holdings (EU) Limited | Financial services | 2018 |
| Rlj-Building & Maintenance Contractors Ltd. | Other services | 2025 |
| RLL Limited | Health & social care | 2018 |
| RLM Computer Systems Limited | Information & communication | 2002 |
| Rlogic Ltd | Information & communication | 2020 |
| RLR Asset Finance Ltd | Financial services | 2026 |
| RLS Developments Ltd | Real estate | 2022 |
| RM York Ltd | Construction | 2021 |
| RM22 Advisory Limited | Professional & scientific | 2024 |
| Rmao Ltd | Health & social care | 2022 |
| Rmceducation Limited | Education | 2016 |
| Rmciadvisory Ltd | Professional & scientific | 2025 |
| RMD Engineering Services Limited | Professional & scientific | 2016 |
| RMP Commercial Limited | Professional & scientific | 2019 |
| RMP York Limited | Other services | 2025 |
| RNB York Ltd | Real estate | 2025 |
| RND Motorsport Ltd | Wholesale & retail | 2014 |
| RO & LE Barbers Ltd | Other services | 2026 |
| RO Pictures Limited | Information & communication | 2021 |
| Roadside Reliance PMN Services Ltd | Wholesale & retail | 2025 |
| Roadsys UK Limited | Professional & scientific | 2025 |
| Roari App Ltd | Information & communication | 2026 |
| ROB Collings Limited | Wholesale & retail | 1987 |
| ROB Fakes Ltd | Professional & scientific | 2023 |
| Robert & Ruby Limited | Wholesale & retail | 2022 |
| Robert Frederickson Limited | Wholesale & retail | 2017 |
| Robert Hooke Associates Ltd | Professional & scientific | 2018 |
| Robert Leiby Ltd | Health & social care | 2018 |
| Robert Sheffield Ltd | Arts & recreation | 2016 |
| Robert Smith Painting & Decorating Ltd | Construction | 2002 |
| Robert Thompson's Craftsmen Limited | Manufacturing | 1951 |
| ROBERT170617 Limited | Construction | 2017 |
| Roberts Martin & Partners Investments Ltd | Financial services | 2015 |
| Robertson's Solicitors | Professional & scientific | 2005 |
| Robertsons Building and Roofing Limited | Construction | 2015 |
| Robin Hood's Bay Limited | Real estate | 2021 |
| Robin IP Limited | Professional & scientific | 2026 |
| Robin Lewis & Associates Limited | Extraterritorial | 2013 |
| Robin Warkup Limited | Agriculture & fishing | 2002 |
| Robinson Commercial Consultancy (UK) Ltd | Professional & scientific | 2020 |
| Robinson Engineering Services Limited | Manufacturing | 2003 |
| Robinson Pharaoh Consulting Limited | Professional & scientific | 2025 |
| Robinson Property York Ltd | Real estate | 2026 |
| Robinwood York Limited | Wholesale & retail | 2024 |
| Robson and Sons Ltd | Real estate | 2020 |
| Robur Joinery Ltd | Manufacturing | 2017 |
| Robyn Lancaster Holdings Ltd | Real estate | 2019 |
| ROC Events Limited | Health & social care | 2008 |
| Rocco Living Limited | Construction | 2021 |
| Roche Admin Services Ltd | Administrative & support | 2024 |
| Roche Legal Limited | Professional & scientific | 2015 |
| Rock and Stone York Limited | Administrative & support | 2003 |
| Rock Cross-Martial Training Ltd | Education | 2013 |
| Rock Garden Ceramics Limited | Manufacturing | 2023 |
| Rock GOD Academy Ltd | Education | 2016 |
| Rock Hair (York) Limited | Other services | 2014 |
| Rock-Tech AV Ltd | Manufacturing | 2020 |
| Rockar 2 Limited | Wholesale & retail | 2016 |
| Rockcurl (for MEN) Limited | Other services | 2011 |
| Rockcurl (Hairdressing) Limited | Other services | 2011 |
| Rockcurl Limited | Other services | 2011 |
| Rocket and Roll Deli Limited | Hospitality | 2019 |
| Rockfish ST Ives Ltd | Construction | 2014 |
| Rockhopper Software Limited | Information & communication | 2024 |
| Rockin' Horse Promotions (Events) Limited | Administrative & support | 2012 |
| Rockin’ Horse Property Ltd | Construction | 2025 |
| Rockpools (South West) Limited | Real estate | 2018 |
| Rockriver Expeditions Limited | Administrative & support | 2015 |
| Rockwood Building Services Ltd | Construction | 2008 |
| Rodgers of York Ltd. | Wholesale & retail | 1940 |
| Roecliffe Financial Limited | Hospitality | 2014 |
| Roger Electrical Limited | Construction | 2006 |
| Roger Spencer Logan Limited | Professional & scientific | 2000 |
| Rogers G.S. Ltd | Administrative & support | 2025 |
| Rogue Cycling Club Service Course Limited | Wholesale & retail | 2026 |
| Rogue's DEN Hobbies Limited | Wholesale & retail | 2024 |
| Rohrer & Co Limited | Professional & scientific | 2007 |
| Roisin Ltd | Wholesale & retail | 2024 |
| Rojak Design Limited | Manufacturing | 1995 |
| Rokitek Ltd | Information & communication | 2023 |
| Roko Furniture Limited | Manufacturing | 2012 |
| Roland Court Management Company (York) Limited | Households | 1988 |
| Rolawn Limited | Agriculture & fishing | 2002 |
| Rolco 144 Limited | Real estate | 2001 |
| Rollakat Consulting Limited | Agriculture & fishing | 2017 |
| Rolling Hills Cottages Limited | Real estate | 2023 |
| Rolling Snowballs Ltd | Information & communication | 2009 |
| Rollinson Electrical Ltd | Construction | 2021 |
| Rolston Construction Ltd | Construction | 2021 |
| Rolston Property Group Ltd | Real estate | 2024 |
| Rom's Consultancy Ltd | Health & social care | 2024 |
| Roma Holdings Limited | Professional & scientific | 1977 |