| Roma Inclusion Social Empowerment CIC | Health & social care | 2024 |
| Roma Insights Limited | Professional & scientific | 2005 |
| Romali Holdings Ltd | Financial services | 2020 |
| Roman Housing Developments Limited | Construction | 2024 |
| Romer Properties Ltd | Real estate | 2023 |
| Romer Property Services Ltd | Construction | 2017 |
| Romley Lets Ltd | Real estate | 2024 |
| Romsa Limited | Real estate | 2024 |
| Romsey Holdings Ltd | Financial services | 2019 |
| Romulus Industries Ltd | Professional & scientific | 2025 |
| RON Thompson IOD Ltd | Professional & scientific | 2023 |
| Rondot GB Limited | Wholesale & retail | 2010 |
| Roofcraft Group Ltd | Construction | 2024 |
| Roofing & Building Limited | Construction | 2025 |
| Roofing Gurus Limited | Construction | 2019 |
| Roofs Above Limited | Extraterritorial | 2023 |
| Roofs Above Properties Limited | Real estate | 2023 |
| Roofs Above York Limited | Construction | 2014 |
| Roofsrusyork Ltd | Construction | 2026 |
| Room Developments Limited | Construction | 2014 |
| ROOMS4GROUPS Limited | Administrative & support | 2015 |
| ROOT1EVENTS Limited | Real estate | 2026 |
| Rootcorz Limited | Professional & scientific | 2003 |
| Rooted Realty Ltd | Households | 2025 |
| Roots Joinery Limited | Construction | 2016 |
| Roots York Limited | Hospitality | 2018 |
| Roots York Restaurant Ltd | Hospitality | 2018 |
| Rootsol Ltd | Information & communication | 2008 |
| Ropergate Dental Care Limited | Health & social care | 2019 |
| Ropewalk (York) Limited | Extraterritorial | 1947 |
| Rory Brooks Ltd | Construction | 2025 |
| Rose & Child Studios Ltd | Information & communication | 2026 |
| Rose Bower Developments Ltd | Construction | 2023 |
| Rose Centre Business Park (Management Company) Limited | Extraterritorial | 2012 |
| Rose Dene Projects Limited | Construction | 2010 |
| Rose Estates (Yorkshire) Limited | Real estate | 1988 |
| Rose Hair Design Limited | Other services | 2026 |
| Rose Hospitality (York) Ltd | Hospitality | 2026 |
| Rose Manor (Hadleigh) Residents Management Company Limited | Households | 2023 |
| Rose Pizza 28 Ltd | Hospitality | 2026 |
| Rose Tulip Holdings Ltd | Financial services | 2018 |
| Rose Water Farming Limited | Agriculture & fishing | 2018 |
| Roseberry View (Nunthorpe) Management Company Limited | Households | 2026 |
| Rosedale & District Show Ltd | Other services | 2005 |
| Rosedale Associates (York) Ltd | Real estate | 2013 |
| Rosedale Joinery (York) Limited | Construction | 2011 |
| Rosedale Northern Limited | Professional & scientific | 2007 |
| Rosella Properties Yorks Limited | Real estate | 2023 |
| Rosetta Landscape Design Limited | Professional & scientific | 2013 |
| Rosevean Veterinary Practice Limited | Professional & scientific | 2015 |
| Rosevilla Properties Limited | Construction | 1999 |
| Roseville Care Homes (Melksham) Limited | Health & social care | 2004 |
| Roseville Care Homes Limited | Health & social care | 2003 |
| Roseville Care Services Limited | Health & social care | 2022 |
| Roseville Investments Limited | Financial services | 2021 |
| Rosewold Unlimited | Professional & scientific | 2025 |
| Rosewoods Property Holdings Ltd | Real estate | 2025 |
| Rosie's Pet Supplies Ltd | Wholesale & retail | 2020 |
| Ross Charles Ltd | Other services | 2024 |
| Ross Hornby Enterprises Ltd | Financial services | 2022 |
| Ross Parkinson Builders of York Limited | Construction | 2012 |
| Rossdales Limited | Professional & scientific | 2021 |
| Rossmoor Garage Limited | Wholesale & retail | 2015 |
| Rosti UK Ltd. | Manufacturing | 2015 |
| Rostrobruno Limited | Real estate | 2021 |
| Rota Procurement Services Ltd | Professional & scientific | 2010 |
| Rotas-Sator Limited | Professional & scientific | 1996 |
| Roth Rail Ltd | Construction | 2014 |
| Rotherwood Rushmoor Ltd | Information & communication | 2026 |
| Rothmont Blake Limited | Extraterritorial | 2026 |
| Rothwell Electrical Services Ltd | Extraterritorial | 2019 |
| Rothwell Group Ltd | Construction | 2002 |
| Rothwell Trustees Limited | Professional & scientific | 2022 |
| ROTO77 Ltd | Professional & scientific | 2021 |
| Round Pebble Holding Company Limited | Professional & scientific | 2016 |
| Round Table Estates Ltd | Households | 2024 |
| Roundraise Limited | Information & communication | 2025 |
| Routledge & Routledge Property Surveying Ltd | Real estate | 2022 |
| Routrix Ltd | Arts & recreation | 2026 |
| Rovh Property Management Ltd | Real estate | 2026 |
| Rovibo Ltd | Wholesale & retail | 2021 |
| Roving Press Limited | Information & communication | 2006 |
| Rowan & Co Construction Ltd | Water & waste | 2025 |
| Rowan Displays Limited | Manufacturing | 2007 |
| Rowan Grove IT Ltd | Information & communication | 2025 |
| Rowan Johnson Ltd | Professional & scientific | 2016 |
| Rowantreefinishes Limited | Construction | 2024 |
| Rowe Property Holdings Ltd | Real estate | 2026 |
| Rowena LEE PR Limited | Professional & scientific | 2014 |
| Rowlinson Renovations Limited | Construction | 2023 |
| Roxburgh Property Holdings Ltd | Real estate | 2020 |
| Roxybinx Limited | Hospitality | 2025 |
| Royal Oak Ripon Rooms LLP | | 2013 |
| Royal Pilgrim Communications Limited | Professional & scientific | 2018 |
| Royale Spice Clifton Ltd | Hospitality | 2023 |
| Royle Recruitment Limited | Administrative & support | 2015 |
| Roza Foods Limited | Hospitality | 2019 |
| Rozan Radiance Ltd | Health & social care | 2025 |
| RP Clean Ltd | Administrative & support | 2020 |
| RP Racing Limited | Arts & recreation | 2015 |