| R U Here Limited | Extraterritorial | 2016 |
| R&J Campers Ltd | Manufacturing | 2018 |
| R.A. Williams Construction Limited | Construction | 2021 |
| Rabaiotti Limited | Agriculture & fishing | 2003 |
| Race Screens Limited | Wholesale & retail | 2018 |
| Radd Contracting Ltd | Wholesale & retail | 2018 |
| Radicalplumbing Limited | Construction | 2025 |
| Rainbow Reef Daycare Ltd | Education | 2018 |
| Rainer Steadicam Ltd | Information & communication | 2024 |
| RAM Group (Construction) Ltd | Construction | 2021 |
| Raminta Limited | Health & social care | 2011 |
| Randmstitch Ltd | Wholesale & retail | 2024 |
| Rapiamdik Ltd | Other services | 2018 |
| Rapj Holdings Ltd | Financial services | 2017 |
| Ratford Bridge Kitchens & Bedrooms Limited | Manufacturing | 2019 |
| Ratford Bridge Stairs Ltd | Manufacturing | 2018 |
| Ratford Bridge Storage Ltd | Transport & logistics | 2024 |
| RCA (Trustee) EOT Ltd | Professional & scientific | 2023 |
| RD Lifting Services Limited | Construction | 2013 |
| RDJ Property Developments Limited | Construction | 2020 |
| RE Evans Farms Limited | Agriculture & fishing | 2016 |
| RE Evans Properties Limited | Agriculture & fishing | 2022 |
| Re:Searchers Ltd | Professional & scientific | 2025 |
| Reality Consulting Service Ltd | Administrative & support | 2024 |
| Really Pro Ltd | Hospitality | 2002 |
| Redcliffe Group Ltd | Information & communication | 2026 |
| Redlimit Finance Ltd | Administrative & support | 2025 |
| Redrose Limited | Hospitality | 1997 |
| Refined by Product Limited | Professional & scientific | 2023 |
| Reformo Software Ltd | Information & communication | 2020 |
| Refresh & Go Ltd | Wholesale & retail | 2026 |
| Regency Property & Estates Ltd | Real estate | 2025 |
| Reinmeer Ltd | Extraterritorial | 2023 |
| Rekram Services Ltd | Other services | 2023 |
| Remy Green Limited | Other services | 2020 |
| Renewable Future Building Services Limited | Construction | 2024 |
| Renewall 0 Ltd | Extraterritorial | 2025 |
| Renico Ltd | Other services | 2021 |
| Reohorn Automatics & Amusements Limited | Arts & recreation | 2012 |
| Reon International Group Ltd | Wholesale & retail | 2022 |
| Replylift Ltd | Information & communication | 2026 |
| Retreats Group Limited | Hospitality | 2008 |
| Retromm Ltd | Other services | 2019 |
| Rewild Limited | Professional & scientific | 2015 |
| Reynolds Builders Limited | Construction | 2010 |
| Rezsolutions Tyddewi Ltd | Other services | 2022 |
| RGS Rees’S Gardening Services Ltd | Administrative & support | 2024 |
| RH Engineering Services UK Limited | Construction | 2009 |
| RH Solar Ltd | Construction | 2023 |
| Rhodri George & SON Ltd | Agriculture & fishing | 2025 |
| Rhosygilwen Enterprises Limited | Real estate | 2023 |
| Richard Cooper Consulting Ltd | Professional & scientific | 2020 |
| Richard H Walters Developments Ltd | Real estate | 2024 |
| Richard Hunter Agricultural Contracting Limited | Agriculture & fishing | 2026 |
| Richard Thomas Fencing Limited | Agriculture & fishing | 2013 |
| Rickeston Care Home Limited | Health & social care | 2005 |
| Rickeston Poultry Limited | Agriculture & fishing | 2020 |
| Rickeston Property Ltd | Real estate | 2024 |
| Riebeeck Solutions Limited | Professional & scientific | 2006 |
| Rise AS One Ltd | Administrative & support | 2025 |
| Rising Golden Lion Ltd | Administrative & support | 2024 |
| Ritchspeed Telecoms Ltd | Information & communication | 2006 |
| RJM OIL Field Services Ltd | Mining & quarrying | 2013 |
| Rklm Engernering Limited | Professional & scientific | 2019 |
| RLH Architectural Ltd | Professional & scientific | 2009 |
| RN Plumbing and Property Maintenance Limited | Construction | 2025 |
| Robert Mcneil Ltd | Manufacturing | 2021 |
| Robinson Advisory Services Ltd | Information & communication | 2025 |
| Robust Boats Limited | Manufacturing | 2012 |
| Roche & Sons Ltd | Real estate | 2021 |
| Rochgate Property Limited | Hospitality | 2002 |
| Rochgate Systems Limited | Professional & scientific | 2003 |
| Rock Carpentery Ltd | Construction | 2024 |
| Rocknrolla Emporium Ltd | Wholesale & retail | 2017 |
| Rockoder Ltd | Information & communication | 2016 |
| Rocksdrift Management Company Limited | Real estate | 2001 |
| Rockys Taxis Ltd | Transport & logistics | 2009 |
| Roda Property Ltd | Construction | 2018 |
| Rogers Safety Limited | Administrative & support | 2009 |
| Rogeston Farm Ltd | Agriculture & fishing | 2009 |
| Rogeston Management Company Limited | Households | 2012 |
| ROGOZANU7 Ltd | Wholesale & retail | 2025 |
| Roopan Ltd | Other services | 2021 |
| Rope Access Pembrokeshire Ltd | Professional & scientific | 2023 |
| Roscoe Plant Hire Ltd | Construction | 2025 |
| Roscoe Tree Services Ltd | Other services | 2016 |
| Rosehill Community Management CIC | Households | 2021 |
| Rosehill Waste Management Limited | Water & waste | 2010 |
| Rosemary Court (Crundale) Management Company Limited | Households | 2011 |
| Ross Auto-Electrical Ltd | Wholesale & retail | 2025 |
| Rowan Electrical Services Limited | Construction | 2019 |
| Rowan Services LLP | | 2019 |
| ROY Jones T/A Business Development Services Wales Ltd | Administrative & support | 2021 |
| Royffe Flynn Limited | Wholesale & retail | 2014 |
| RTP Williams Limited | Administrative & support | 2006 |
| Rubyshine Limited | Professional & scientific | 1996 |
| Rudbaxton Farms Limited | Manufacturing | 1998 |
| Rudbaxton Holdings Limited | Financial services | 2021 |
| Runwayskiln Limited | Hospitality | 2017 |
| Rusev Care Limited | Health & social care | 2018 |