| Pucmo Ltd | Wholesale & retail | 2025 |
| Pukka Productions Community Interest Company | Arts & recreation | 2011 |
| Pupie Ltd | Manufacturing | 2024 |
| Pure View Solutions Ltd | Administrative & support | 2026 |
| Purefreedom Limited | Professional & scientific | 2010 |
| Purehearts Home Care Limited | Public administration | 2026 |
| Purity Cleaning Solutions Limited | Administrative & support | 2024 |
| Q a Bell Ltd | Professional & scientific | 2022 |
| Qinglan Ltd | Hospitality | 2015 |
| QJC CB Ltd | Hospitality | 2024 |
| Qualit Web Design Ltd | Information & communication | 2024 |
| Quality Camper Conversions Limited | Manufacturing | 2021 |
| Quality Compliance, John Edmunds Limited | Professional & scientific | 2019 |
| Quantarlis Limited | Manufacturing | 2026 |
| Queensberry Gymnasium Ltd | Arts & recreation | 2023 |
| Queertawe CIC | Health & social care | 2025 |
| Questblow Limited | | 1982 |
| Questborough Limited | Health & social care | 2012 |
| Quick Staff AW Limited | Administrative & support | 2019 |
| Quickone Courier Limited | Transport & logistics | 2025 |
| Quintera Clothing Ltd | Wholesale & retail | 2024 |
| R & G. Phillips Ltd | Manufacturing | 2007 |
| R a Realty Ltd | Real estate | 2022 |
| R Chisnall Ltd | Professional & scientific | 2018 |
| R D Baker Haulage Ltd. | Transport & logistics | 2010 |
| R Gabe Ltd | Health & social care | 2014 |
| R George Welding Ltd | Construction | 2015 |
| R Grisdale Properties Ltd | Real estate | 2026 |
| R Jones Building Solutions Limited | Construction | 2007 |
| R Well Training Solutions Limited | Education | 2022 |
| R&S Construction and Carpentry Ltd | Construction | 2025 |
| R.A.N. Group Limited | Real estate | 1991 |
| R.A.N. Hire & Sales Limited | Administrative & support | 1975 |
| R.A.N. Sales Limited | Administrative & support | 1997 |
| R.G.Kear Aviation Ltd | Manufacturing | 2011 |
| R2BEAN2 Coffee Ltd | Wholesale & retail | 2025 |
| R2BEAN2 Group Ltd | Financial services | 2024 |
| Race in the Workplace Ltd | Professional & scientific | 2024 |
| Rack M UP Ltd | Arts & recreation | 2026 |
| Radify Ltd | Health & social care | 2024 |
| RAF ST Athan Golf Club Limited | Arts & recreation | 2004 |
| Rahil Indian Cuisine Ltd | Hospitality | 2025 |
| Rainbow Boxes UK Ltd | Wholesale & retail | 2020 |
| Randalls Rentals Ltd | Real estate | 2019 |
| Rapid Routes Express Ltd | Transport & logistics | 2026 |
| Raptor Consultants Ltd | Administrative & support | 2026 |
| Raven Crane Personnel Ltd | Construction | 2018 |
| Ravenhill Consultancy Limited | Professional & scientific | 2006 |
| Rawals Property Developers Limited | Construction | 2024 |
| RB Autos (Wales) Ltd | Wholesale & retail | 2014 |
| RB Facial Aesthetics Limited | Other services | 2018 |
| Rbnc Ltd | Real estate | 2025 |
| RC Bars Ltd | Hospitality | 2023 |
| RC Delivery Ltd | Transport & logistics | 2021 |
| RD Stays Stock LLP | | 2023 |
| Real Meals Revolution Ltd | Hospitality | 2020 |
| Reclaim Fitness Ltd | Health & social care | 2022 |
| Recycling Storage Solutions Franchise Ltd | Manufacturing | 2024 |
| Red Deer Properties Limited | Real estate | 2020 |
| Red Iron Productions Limited | Wholesale & retail | 2025 |
| Red Oaks Asset Management Limited | Real estate | 2017 |
| Red Ruin Productions Ltd. | Information & communication | 2018 |
| Redeck Limited | Manufacturing | 2026 |
| Rees Worx Limited | Professional & scientific | 2018 |
| Refined Touch Aesthetics Limited | Health & social care | 2025 |
| Refreshing Law Limited | Professional & scientific | 2013 |
| Reggies Pride Limited | Manufacturing | 2020 |
| Rejuvenate Groundworks Group Limited | Construction | 2023 |
| Rejuvenate Group Limited | Construction | 2024 |
| Remote Waiting Room Limited | Information & communication | 2020 |
| Removal & Transport Firm Ltd | Water & waste | 2024 |
| REN and INK Limited | Arts & recreation | 2014 |
| Rendell Electrical Ltd | Construction | 2016 |
| Republico Limited | Hospitality | 2018 |
| Residents Association 141-147 Westward Rise Limited | Households | 2006 |
| Retail Temps Limited | Administrative & support | 2019 |
| Return 2 Health Chiropractic Clinic Ltd | Health & social care | 2023 |
| Return to the Trees Ltd | Extraterritorial | 2021 |
| Reusable Revolution Collective CIC | Health & social care | 2025 |
| Revive CF64 Ltd | Arts & recreation | 2024 |
| REX Construction Building Solutions Ltd | Construction | 2019 |
| RG Plumbing & Bathrooms Limited | Construction | 2025 |
| RGH Industries Ltd | Financial services | 2025 |
| RH Engineering Limited | Other services | 2024 |
| Rhiannon Stokes and Associates Ltd | Health & social care | 2019 |
| Rhoose Bowls Club | Arts & recreation | 2022 |
| Rhoose Electrical Services Ltd | Construction | 2012 |
| Rhoose Grocery Store Limited | Wholesale & retail | 2025 |
| Rhoose Management Company Limited | Professional & scientific | 2016 |
| Rhoose Point Remedies Limited | Manufacturing | 2020 |
| Rhys Bagnall Limited | Manufacturing | 2015 |
| Rhys Hughes Ltd | Financial services | 2021 |
| Richard D Grisdale Ltd | Construction | 2020 |
| Richard Jones Carpets (Barry) Limited | Wholesale & retail | 1991 |
| Richard Wells Builders Limited | Construction | 2017 |
| Richard Weston (Cardiff) Limited | Professional & scientific | 2012 |
| Ringrose Event Medical Consultancy Ltd | Professional & scientific | 2026 |
| RJM4 Ltd | Wholesale & retail | 2026 |
| RJW Aviotech Ltd | Manufacturing | 2018 |
| RL Landscape Maintenance Ltd | Administrative & support | 2014 |