| RG Plumbing (South) Ltd | Construction | 2020 |
| RGP Design Limited | Professional & scientific | 2015 |
| RH Secure Limited | Information & communication | 2022 |
| Rhema UK & Ireland | Other services | 2012 |
| Rhossili Developments Limited | Construction | 2022 |
| Rhossili Ventures Limited | Construction | 2023 |
| Rhymecare Properties Limited | Real estate | 2013 |
| Rhythmix Academy Ltd | Arts & recreation | 2019 |
| RIC Consultants Ltd | Health & social care | 2010 |
| Richard Everton Grain Broker Limited | Agriculture & fishing | 2013 |
| Richard Hull Property Consultants Ltd | Real estate | 2022 |
| Richard James Fine Finishing Ltd | Construction | 2017 |
| Richard Meynell Ltd | Professional & scientific | 2007 |
| Richmond Driving Solutions Ltd | Construction | 2017 |
| Richmond Mews (Horsham) Management Company Limited | Other services | 2016 |
| Rick Renner Ministries Incorporated | Other services | 2000 |
| Rickard Heating Supplies Limited | Transport & logistics | 1994 |
| Rideflow Limited | Transport & logistics | 2026 |
| Ridgehurst Properties Limited | Real estate | 2005 |
| Ridgway Ashworth Limited | Professional & scientific | 2009 |
| Rife Lodges Ltd | Hospitality | 2023 |
| Right Mind Fitness Limited | Other services | 2017 |
| Right NOW Holdings Ltd | Hospitality | 2021 |
| Right Think Limited | Information & communication | 2023 |
| Rigi Investments Limited | Professional & scientific | 1970 |
| Ringprop Marine Ltd | Manufacturing | 2007 |
| Ringwood Sushi Kenny Ltd | Hospitality | 2017 |
| Rinkit Limited | Wholesale & retail | 2011 |
| Riptide Electrical Ltd | Construction | 2024 |
| Rising Sun Consultancy Limited | Information & communication | 2015 |
| Risk Management Training and Advisory Limited | Administrative & support | 2007 |
| Riskmar Ltd | Professional & scientific | 2021 |
| River 88 LLP | | 2006 |
| Riverside Filtration LLP | | 2009 |
| Riverside Precision Limited | Manufacturing | 2001 |
| RJC Surveying & Management Limited | Construction | 2019 |
| RJF Squared Limited | Professional & scientific | 2020 |
| RJP Maritime Limited | Financial services | 2021 |
| RK Infrastructure Limited | Construction | 2019 |
| Rkenny Ltd | Health & social care | 2024 |
| RKH Limited | Wholesale & retail | 2022 |
| RL Paintings Limited | Arts & recreation | 2022 |
| Rlcm Limited | Other services | 2012 |
| RLW Consultants Ltd | Construction | 2024 |
| RM Logistics U.K. Limited | Transport & logistics | 2026 |
| RM Prestige Logistics Limited | Transport & logistics | 2026 |
| RMB Insurance Consultants Limited | Financial services | 2013 |
| RMD Instructors Ltd | Education | 2017 |
| RMG Commodity Holdings Limited | Real estate | 2025 |
| RMT Roofing Specialists Ltd | Construction | 2023 |
| RN Sprackling Limited | Agriculture & fishing | 2002 |
| Roadworthy Ltd | Information & communication | 2025 |
| Roasthost Ltd | Hospitality | 2019 |
| Robert Copeman Window Services Limited | Construction | 2013 |
| Robert Haywood Consultancy Limited | Health & social care | 2010 |
| Robert Hurst (Group) Ltd | Administrative & support | 2008 |
| Robert Hurst Developments Ltd | Construction | 2018 |
| Robert Hurst Holdings Ltd | Financial services | 2015 |
| Robert Hurst House Ltd | Real estate | 2024 |
| Robert Nicholson Ltd | Professional & scientific | 2026 |
| Robert Sadler (Chichester) LLP | | 2012 |
| Robert Willock HR Services Ltd | Professional & scientific | 2026 |
| Robert's Removals Ltd | Transport & logistics | 2020 |
| Roberts Consulting (Abingdon) Limited | Construction | 2000 |
| Robham Facilities Management Limited | Professional & scientific | 2013 |
| Robin's Nest Coffee Shop Ltd | Hospitality | 2023 |
| Robinsons Haulage (Sussex) Limited | Transport & logistics | 2008 |
| Robuste Ltd | Real estate | 2020 |
| Roca Productions Ltd | Arts & recreation | 2026 |
| Rocco 13 Limited | Arts & recreation | 2025 |
| Rock Solid Centre Ltd | Health & social care | 2026 |
| Rocking Horse Southgate Limited | Wholesale & retail | 2023 |
| Rockwell (Sussex) Ltd | Real estate | 2014 |
| Rockwell Property Management Ltd | Real estate | 2025 |
| Rockwood Court Management Co Limited | Real estate | 2014 |
| Rodopi Bears Transport Ltd | Transport & logistics | 2018 |
| Roger Gunn Garden Machinery Ltd | Manufacturing | 2016 |
| Roger Still Horology Ltd. | Manufacturing | 2015 |
| Roger Upham Marine Electronics Ltd | Manufacturing | 2003 |
| Rogerson & Protheroe Construction Limited | Construction | 2004 |
| Rogerson & Protheroe Holdings Ltd | Financial services | 2018 |
| Rolevale Services Ltd | Professional & scientific | 2015 |
| Rolling Ventures Limited | Wholesale & retail | 2025 |
| Rollo Scaffolding Services Ltd | Construction | 2026 |
| Roman Landing Leaseholds Limited | Households | 1949 |
| Romano Estates Ltd | Hospitality | 2022 |
| Roof Restorer Weak Made Strong Ltd | Construction | 2025 |
| Rookwood Chichester Limited | Construction | 1986 |
| Room Outside UK Limited | Construction | 2010 |
| Roots Catering Limited | Hospitality | 2017 |
| ROR Chichester Ltd | Arts & recreation | 2025 |
| Roritmas Ltd | Health & social care | 2015 |
| Rory the VET Ltd | Professional & scientific | 2020 |
| ROS Equine Veterinary Services Ltd | Professional & scientific | 2015 |
| Rosarrios Limited | Hospitality | 2016 |
| Rosarrios Pizzeria Ltd | Hospitality | 2021 |
| Rosdon Accommodation Limited | Hospitality | 2021 |
| Rosdon Limited | Hospitality | 2007 |
| Rose & Woods Ltd | Wholesale & retail | 2025 |
| Rose and Brooks Limited | Wholesale & retail | 1999 |