| RP Research Ltd | Professional & scientific | 2024 |
| Rpco Limited | Wholesale & retail | 2003 |
| RPH York Ltd | Construction | 2015 |
| RPI Limited | Wholesale & retail | 2008 |
| RPK Developments Limited | Real estate | 2018 |
| RPR Builders (York) Ltd | Construction | 2017 |
| RPR Damp-Proofing Ltd | Construction | 2014 |
| RR Powerhouse Limited | Information & communication | 2023 |
| RR Rowan Real Estate Ltd | Real estate | 2025 |
| Rrad York Limited | Professional & scientific | 2024 |
| Rrjj Limited | Financial services | 2020 |
| RS Mobile Solutions Limited | Information & communication | 2005 |
| RSB Solutions Ltd | Construction | 2016 |
| RSD Care Ltd | Health & social care | 2020 |
| RSJ Healthcare Solutions Limited | Health & social care | 2023 |
| RSM (York) Limited | Construction | 2019 |
| Rsti Consultancy Ltd | Information & communication | 2019 |
| RSY Properties Ltd | Real estate | 2021 |
| RSY Studios Ltd | Real estate | 2022 |
| RT Tech & Fashion Ltd | Wholesale & retail | 2025 |
| RTI Consultancy Ltd | Professional & scientific | 2015 |
| RTI World Meeting York Limited | Other services | 2026 |
| RTS Ward & JRS Brigham Ltd | Agriculture & fishing | 2015 |
| RTS35 Ltd | Information & communication | 2014 |
| Rubric Consulting Limited | Professional & scientific | 2000 |
| Rubric Language Limited | Professional & scientific | 1999 |
| Rubric Translation Limited | Professional & scientific | 1994 |
| Rudgate Brewery Limited | Manufacturing | 1992 |
| Ruff Cuts Dog Grooming Limited | Other services | 2018 |
| Rufforth Airfield East Ltd | Real estate | 2021 |
| Rufforth Estates Limited | Real estate | 2017 |
| Ruicheng International Ltd | Wholesale & retail | 2023 |
| Ruki in the Forest LLP | | 2024 |
| Rumbo Limited | Professional & scientific | 2010 |
| Runako Solutions Limited | Wholesale & retail | 2025 |
| Runway Investments Limited | Financial services | 1985 |
| Rupert Court (Management) Limited | Real estate | 1996 |
| Rupert Dewhirst & Associates Ltd | Professional & scientific | 2012 |
| Rural Business Services Limited | Professional & scientific | 2010 |
| Rural Energy Yorkshire Ltd | Extraterritorial | 2008 |
| Ruraledge Ltd | Administrative & support | 2026 |
| Russell Associates Management Ltd | Professional & scientific | 2012 |
| Russell Clark Limited | Manufacturing | 2024 |
| Ruth Gordon Associates Limited | Health & social care | 2008 |
| Rutilant Ltd | Professional & scientific | 2025 |
| Rutin Products Limited | Wholesale & retail | 1952 |
| Rutland House Surgery Limited | Professional & scientific | 2000 |
| RV Music Limited | Information & communication | 2021 |
| RVA Consulting Engineers Limited | Professional & scientific | 2002 |
| RVA Engineering Solutions Limited | Professional & scientific | 2004 |
| RVA Group Limited | Professional & scientific | 2005 |
| RVT Plumbing and Heating Limited | Construction | 2018 |
| RW Consultancy Services Limited | Professional & scientific | 2008 |
| RW Loss Adjusters Limited | Financial services | 2023 |
| RW Sadlers Ltd | Professional & scientific | 2017 |
| RWR Developments Limited | Construction | 2021 |
| Rxyz Ltd | Health & social care | 2025 |
| RY Digital Services Limited | Information & communication | 2024 |
| Ryan Batty Farriery Ltd | Agriculture & fishing | 2011 |
| Ryan Samuel Holdings Limited | Real estate | 2024 |
| Ryan Samuel Properties Limited | Real estate | 2024 |
| Ryanhouse Estates Limited | Extraterritorial | 1983 |
| Ryansub Limited | Wholesale & retail | 2025 |
| Rycroft Property Ltd | Real estate | 2020 |
| Ryde Services Ltd | Other services | 2021 |
| Ryder Brands Limited | Professional & scientific | 2016 |
| Ryder Court Management Company Limited | Households | 2006 |
| Ryechem Limited | Health & social care | 2008 |
| Ryedale Aggregates Limited | Mining & quarrying | 2010 |
| Ryedale Anglers' Club Limited | Arts & recreation | 1996 |
| Ryedale Asset Management Ltd | Financial services | 2011 |
| Ryedale Auctioneers Limited | Wholesale & retail | 1943 |
| Ryedale Blinds Limited | Manufacturing | 2023 |
| Ryedale Builders Limited | Construction | 2000 |
| Ryedale Building Services Ltd | Construction | 2013 |
| Ryedale Educational Consultants Ltd | Education | 2023 |
| Ryedale Electrical Services Limited | Construction | 1989 |
| Ryedale Folk Museum | Arts & recreation | 2011 |
| Ryedale Garage Doors Limited | Construction | 2024 |
| Ryedale Garages (1946) Limited | Wholesale & retail | 1946 |
| Ryedale Group Limited | Professional & scientific | 2004 |
| Ryedale Landscapes Ltd | Construction | 2019 |
| Ryedale Printing Works Limited | Manufacturing | 1978 |
| Ryedale Racing Limited | Arts & recreation | 2017 |
| Ryedale Renewables Limited | Water & waste | 2020 |
| Ryedale Vineyards Ltd | Agriculture & fishing | 2025 |
| Ryefresh Ltd | Administrative & support | 2023 |
| Ryland Horticulture Ltd | Agriculture & fishing | 2003 |
| Rylets York Ltd | Real estate | 2026 |
| Ryther Alarms Limited | Administrative & support | 2007 |
| S & C Management Consultancy Limited | Information & communication | 2016 |
| S & E Bentley (Consultancy) Ltd. | Professional & scientific | 2002 |
| S & GM Clements Ltd | Construction | 2005 |
| S & H Legal Limited | Professional & scientific | 2024 |
| S & J Butchers Limited | Wholesale & retail | 2021 |
| S & J Smith Properties Limited | Real estate | 2021 |
| S & K Electrical Limited | Construction | 2015 |
| S & K Property (Yorkshire) Limited | Real estate | 2019 |
| S & P Eye-Care Ltd | Health & social care | 2020 |
| S & R Dental Limited | Health & social care | 2022 |