| Rampart (Holdings) Limited | Financial services | 2020 |
| Rampart Construction Limited | Construction | 2016 |
| Rampartuk Limited | Construction | 2024 |
| Ranch Properties Limited | Real estate | 2024 |
| Rapido Healthcare Supplies Ltd | Extraterritorial | 2013 |
| Rawle Home Improvements Ltd | Wholesale & retail | 2025 |
| RB Coaching & Development Limited | Education | 2025 |
| RB Enterprises & Sons Ltd | Real estate | 2017 |
| RCT Solutions Ltd | Arts & recreation | 2020 |
| Rebirth Mind and Body Ltd | Arts & recreation | 2025 |
| Red Arrow Trading Limited | Wholesale & retail | 2019 |
| Redbox Finishings Limited | Construction | 2019 |
| Redbug Transport Ltd | Transport & logistics | 2021 |
| Redshaw Properties Limited | Real estate | 2016 |
| Redtooth Entertainment Limited | Professional & scientific | 2010 |
| Redtooth Limited | Other services | 2001 |
| Reliant Property Investments Limited | Real estate | 2024 |
| Renai Beauty Limited | Wholesale & retail | 2023 |
| Renparts Europe Limited | Wholesale & retail | 2019 |
| Reserved Limited | Professional & scientific | 2021 |
| Rewrite Futures Ltd | Education | 2025 |
| Reyt Homes Limited | Real estate | 2022 |
| RF Pet Services Ltd | Agriculture & fishing | 2023 |
| RFB Inns Ltd | Hospitality | 2025 |
| RG Takeaway Limited | Hospitality | 2021 |
| RGB 888 Limited | Hospitality | 2025 |
| RGR Building Services Ltd | Construction | 2009 |
| Rhiannon Blue Taylor (Properties) Limited | Households | 2023 |
| Rhiannon Blue Taylor Limited | Other services | 2015 |
| Rich Property Group Limited | Real estate | 2022 |
| Richard Hamshaw Plumbing Services Ltd | Construction | 2024 |
| Ring O Bells Properties Limited | Real estate | 2024 |
| Ring O Bells Swinton Ltd | Hospitality | 2020 |
| RJ MMA Ltd | Arts & recreation | 2025 |
| RJ Window Cleaning Services Ltd | Administrative & support | 2023 |
| RJB Solutions Ltd | Construction | 2015 |
| RJF Electrical Services Limited | Construction | 2022 |
| RM Innovation & Consultancy Limited | Professional & scientific | 2025 |
| Rmag Equipment Limited | Construction | 2002 |
| ROB Green Ltd | Information & communication | 2020 |
| Robert RIX Homes Limited | Wholesale & retail | 1991 |
| Roberts Property Management & Holdings Ltd | Real estate | 2026 |
| Rockingham Plastering Ltd | Construction | 2017 |
| Rocky 564 Limited | Hospitality | 2025 |
| Roper Martial Arts LLP | | 2023 |
| Rosas Desserts Ltd | Hospitality | 2025 |
| Rose Catering and Sewing Ltd | Hospitality | 2016 |
| Roses Estates (Yorkshire) Limited | Financial services | 2019 |
| Rother Multiclean Services Limited | Administrative & support | 2025 |
| Rotherham Pioneers Ltd | Other services | 2020 |
| Rotherham Self Store Limited | Professional & scientific | 2009 |
| Rotherham Trading Ltd | Wholesale & retail | 2020 |
| Rotherham Waste Oils Limited | Water & waste | 2004 |
| Rowms Lane Daily Shop Limited | Wholesale & retail | 2025 |
| Roxley Ltd | Wholesale & retail | 2022 |
| RPH Installations Limited | Construction | 2014 |
| Rrells Cleaning Services Ltd | Administrative & support | 2021 |
| RS Convenience Limited | Wholesale & retail | 2020 |
| RS Performance Cars South Yorkshire Ltd | Wholesale & retail | 2025 |
| RS Performance South Yorkshire Limited | Wholesale & retail | 2021 |
| RSB Catering Services Ltd | Hospitality | 2023 |
| Ruslyn Homes Limited | Real estate | 2024 |
| RW Cladding Solutions Ltd | Construction | 2024 |
| RWB Utilities Ltd | Construction | 2008 |
| Ryan Developments (Northern) Limited | Real estate | 2018 |
| Rydertech Ltd | Information & communication | 2020 |
| S & M Investment (Holdings) Limited | Financial services | 2020 |
| S & R Services (Mexborough) Ltd | Administrative & support | 2014 |
| S & S Storage Equipment Installations Limited | Manufacturing | 2014 |
| S and L Wilsher Ltd | Hospitality | 2025 |
| S M Hoyle Decor Ltd | Construction | 2024 |
| S W Railway Limited | Construction | 2016 |
| S&R Maintenance Ltd | Construction | 2026 |
| S. Simpson Limited | Other services | 2012 |
| S.L.G.T. Property Co. Ltd | Real estate | 2025 |
| S.S. Electrical Contractors Limited | Construction | 2014 |
| S61 Enterprises Limited | Wholesale & retail | 2016 |
| S64BATHROOMS Ltd | Construction | 2026 |
| Saag Limited | Hospitality | 2011 |
| Sabsky Limited | Agriculture & fishing | 2025 |
| Safe Pest Prevention and Bird Control Ltd | Agriculture & fishing | 2013 |
| Safeguard Communication Systems Limited | Construction | 2012 |
| Safety Testing Solutions Limited | Administrative & support | 2011 |
| Salsons Consulting Ltd | Professional & scientific | 2025 |
| SAM Thompson Bespoke Carpentry Limited | Manufacturing | 2020 |
| Sample Bottles Ltd | Wholesale & retail | 2014 |
| Sanctum (Kilnhurst) Management Company Limited | Households | 2016 |
| Sandra's Umami Ltd | Transport & logistics | 2025 |
| Sandygate Ltd | Real estate | 2006 |
| Sarah's Bakery Limited | Wholesale & retail | 2020 |
| Sarat Engineering Ltd | Wholesale & retail | 2013 |
| Satchmo Construction Limited | Construction | 2025 |
| Satchmo Properties Limited | Real estate | 2004 |
| SB Automotive Ltd | Wholesale & retail | 2025 |
| Scalanova Limited | Hospitality | 2020 |
| Scarlett & Co Rentals Limited | Real estate | 2024 |
| Schorford Limited | Financial services | 1972 |
| SCL Traffic Management Ltd | Construction | 2018 |
| Scrap My Car Online Ltd | Wholesale & retail | 2024 |
| SDS Motor Repairs Ltd | Wholesale & retail | 2025 |