| R & D Logistics Ltd | Transport & logistics | 2018 |
| R & D Rentals Ltd | Real estate | 2022 |
| R & D Services (Wales) Ltd | Financial services | 2013 |
| R & G Hospitality Ltd | Hospitality | 2023 |
| R & G Houses Ltd | Real estate | 2022 |
| R & H F. Advisor Ltd | Financial services | 2018 |
| R & H Swansea Ltd | Other services | 2017 |
| R & L Utilities Limited | Construction | 2002 |
| R & L Roofing - Building Ltd | Construction | 2025 |
| R & M Auto (Swansea) Limited | Wholesale & retail | 2018 |
| R & M Freeman Limited | Wholesale & retail | 2017 |
| R & R Developments (SW) Limited | Administrative & support | 2007 |
| R & R Living Ltd | Real estate | 2023 |
| R & R Smart Solutions Limited | Construction | 2022 |
| R & S Adams GP Locum Ltd | Health & social care | 2023 |
| R a Jones Building Limited | Construction | 2018 |
| R and J Metals Ltd | Water & waste | 2015 |
| R Beddow & SON Limited | Construction | 2016 |
| R Carpentry Ltd | Construction | 2023 |
| R Chrystal Limited | Construction | 2017 |
| R Cullen Interiors Limited | Construction | 2024 |
| R H Bowden & SON Limited | Manufacturing | 1970 |
| R H E Global Ltd | Professional & scientific | 2020 |
| R H Environmental Limited | Professional & scientific | 2005 |
| R Hills Construction Ltd | Construction | 2018 |
| R Hills Garden Machinery Ltd | Manufacturing | 2024 |
| R J Brickwork Ltd | Construction | 2020 |
| R J Burkinshaw Accountancy Ltd | Professional & scientific | 2021 |
| R J Hughes Properties Ltd | Real estate | 2025 |
| R J Property Group Limited | Real estate | 2017 |
| R J Sullivan Ltd | Real estate | 2016 |
| R L Rees Ltd | Construction | 2014 |
| R L S Rentals Limited | Real estate | 2007 |
| R M Blake Properties Ltd | Real estate | 2023 |
| R P S Tiling Ltd | Construction | 2022 |
| R Powell Properties Ltd | Construction | 2015 |
| R S Photographic Ltd | Wholesale & retail | 2012 |
| R S Rees Property Ltd | Real estate | 2025 |
| R W F Enterprises Limited | Transport & logistics | 2025 |
| R W Fencing Contractors Ltd | Construction | 2023 |
| R W Langford (Builders) Limited | Construction | 2003 |
| R&A Cabs Ltd | Transport & logistics | 2019 |
| R&C Maintenance Limited | Construction | 2011 |
| R&E Heating Ltd | Construction | 2019 |
| R&G Clarke Consulting Ltd | Hospitality | 2024 |
| R&K Concrete Pumping Ltd | Construction | 2020 |
| R&L Group Limited | Construction | 2023 |
| R&R Building 2025 Ltd | Construction | 2025 |
| R&R Pressure Washer Services Ltd | Manufacturing | 2022 |
| R&R Property (Swansea) Limited | Real estate | 2018 |
| R&T Events Limited | Administrative & support | 2023 |
| R. & V. Ellis Limited | Transport & logistics | 1990 |
| R. J. Auto's & Sons Ltd | Wholesale & retail | 1997 |
| R. J. P Prestige Properties Ltd | Real estate | 2026 |
| R. S. Choudhary Ltd | Hospitality | 2025 |
| R.A. Racey (GT. Yarmouth) Limited | Wholesale & retail | 1975 |
| R.A.Arthur & Co Limited | Professional & scientific | 2013 |
| R.A.D.Landmark Properties Ltd | Real estate | 2024 |
| R.C. Hudson and Co Ltd | Real estate | 2020 |
| R.D.M. Electrical Services Limited | Construction | 1988 |
| R.F. Henderson Motors (Swansea) Limited | | 1976 |
| R.G.D. Commercial Properties Limited | Administrative & support | 1973 |
| R.H. Damp Proofing Limited | Other services | 2009 |
| R.H.Y.S Candles Limited | Wholesale & retail | 2014 |
| R.Hinton Associates Ltd. | Information & communication | 2000 |
| R.I. Kenyon Ltd. | Information & communication | 2002 |
| R.J. Jones & Sons Limited | Real estate | 1933 |
| R.J.Willey and Associates Ltd. | Administrative & support | 2016 |
| R.N.Reon Limited | Wholesale & retail | 2025 |
| R.P.M. Travel Ltd | Professional & scientific | 2020 |
| R.R Site Services Ltd | Professional & scientific | 2025 |
| R.S. Ace Plastering & Building Ltd | Construction | 2022 |
| R.T Carpentry & Building Ltd | Construction | 2024 |
| R.T. Scott Ltd | Construction | 2014 |
| R8TE Telecom Limited | Information & communication | 2013 |
| Rabs Pads Limited | Real estate | 2025 |
| Race Council Cymru | Professional & scientific | 2011 |
| Raceco Limited | Real estate | 2020 |
| RAD Europe Limited | Wholesale & retail | 2009 |
| RAD Scales Ltd | Wholesale & retail | 2012 |
| RAD Smoking Ltd | Wholesale & retail | 2012 |
| RAD Trading (Europe) Ltd. | Wholesale & retail | 2012 |
| RAD Trading (UK) Limited | Wholesale & retail | 2012 |
| Radcool Limited | Wholesale & retail | 1998 |
| Radfit Limited | Wholesale & retail | 1983 |
| Radiant Detail Ltd | Wholesale & retail | 2026 |
| Radical Rainbow Arts Collective CIC | Arts & recreation | 2025 |
| RAG and Bone Cafe Ltd | Hospitality | 2016 |
| Raheleh's Freshlook Beauty Salon Limited | Other services | 2018 |
| Railfast Intermodal Limited | Transport & logistics | 1998 |
| Railfleet Ltd | Wholesale & retail | 2015 |
| Railway Hotel (Faversham) Limited | Hospitality | 2023 |
| Raina Corporation Limited | Information & communication | 2024 |
| Rainbow Blinds Interior Specialists Limited | Manufacturing | 2017 |
| Rainbow Properties Swansea Ltd | Real estate | 2022 |
| Rainbow Rings Ltd | Manufacturing | 2025 |
| Rainbow Solutions Wales Limited | Construction | 2003 |
| Rainwater Media Limited | Manufacturing | 2018 |
| Raised by Robots Limited | Professional & scientific | 2025 |
| Raisegreat Limited | Extraterritorial | 1991 |