| RAW Training Ltd | Education | 2009 |
| RBA Design Ltd | Professional & scientific | 2012 |
| RBG Property Group Limited | Real estate | 1997 |
| RD & EJ Ltd | Real estate | 2019 |
| RDS Energy UK Limited | Professional & scientific | 2016 |
| Ready for Exit Ltd | Professional & scientific | 2026 |
| Real Investment Group Ltd | Financial services | 2023 |
| Rebeldare Ltd | Information & communication | 2017 |
| Rebuildyou Limited | Health & social care | 2023 |
| Recycled Bridal Collective Ltd | Extraterritorial | 2024 |
| Red Butler Music School Limited | Education | 2018 |
| Red ELM Ltd | Real estate | 2018 |
| Redemption Ministries Ltd | Other services | 2025 |
| Redroad Productions Ltd | Information & communication | 2023 |
| Reeve Pro Ltd | Professional & scientific | 2019 |
| Regency Construction Ltd | Construction | 2020 |
| Regency Property Partnership Limited | Real estate | 2009 |
| Regis Garage Limited | Wholesale & retail | 2025 |
| Removals Manager Ltd | Transport & logistics | 2015 |
| Renewables Direct Limited | Energy | 2003 |
| Renewablox Limited | Professional & scientific | 2021 |
| Rerun Sportswear Ltd | Wholesale & retail | 2025 |
| Resilient Landscapes EOE CIC | Professional & scientific | 2023 |
| Resin Epoxy Paints Ltd | Manufacturing | 2024 |
| Retail Development Partnership | | 2005 |
| Retail Services Team Ltd | Other services | 2006 |
| Rever Kitchens Ltd | Wholesale & retail | 2021 |
| Revolution Paragliding Ltd | Education | 2018 |
| Reyna Properties Limited | Real estate | 2018 |
| Rich Hewitt Limited | Professional & scientific | 2013 |
| Ride Pipeline Ltd | Other services | 2015 |
| Ridgeoak Ltd | Construction | 2025 |
| Rife Technologies Ltd | Information & communication | 2024 |
| Right Space Property Ltd | Real estate | 2024 |
| Riman Enterprises Ltd | Real estate | 2016 |
| Ripple Box Ltd. | Wholesale & retail | 2018 |
| RIZ Board Shorts Ltd | Manufacturing | 2008 |
| RIZ UK Limited | Other services | 2007 |
| RJ Infrastructure Ltd | Construction | 2022 |
| RL Global Ltd | Professional & scientific | 2012 |
| RL2 Ltd | Health & social care | 2020 |
| RM & MW Property Investments Limited | Real estate | 2016 |
| RMO Investments Ltd | Real estate | 2024 |
| Roadtrip Rentals Ltd | Administrative & support | 2018 |
| Robest Development Limited | Households | 1987 |
| Robinson Evans Limited | Real estate | 2016 |
| Rocket Fuel Games Ltd | Information & communication | 2019 |
| Roger Beattie CAD Services Limited | Information & communication | 2012 |
| Roland White Property Limited | Real estate | 2017 |
| Rose Luckin Research and Development Limited | Professional & scientific | 2013 |
| Ross Construction & Renovation Ltd | Construction | 2024 |
| Ross Content Writing & Consulting Limited | Professional & scientific | 2016 |
| Round the Bend Driving School Sussex Limited | Professional & scientific | 2012 |
| RS Innovation Consulting Ltd | Professional & scientific | 2022 |
| Rubric Education Limited | Education | 2016 |
| Rusty Pier Crafthouse Limited | Manufacturing | 2022 |
| RW Group Services Ltd | Education | 2024 |
| RWF & F Limited | Real estate | 2023 |
| Rydon Publishing Limited | Information & communication | 2015 |
| Ryfx Media Ltd | Information & communication | 2026 |
| S & J Dent Limited | Health & social care | 2011 |
| S Baker Flooring Limited | Wholesale & retail | 2018 |
| S Embedded Ltd | Professional & scientific | 2021 |
| S Mosl Ltd | Wholesale & retail | 2023 |
| S&B Diagnostics Ltd | Health & social care | 2020 |
| S.E.I. Henfield Ltd | Hospitality | 2018 |
| Sadler Planning Limited | Administrative & support | 2022 |
| Sage Occupational Therapy Services Limited | Health & social care | 2013 |
| Saigon Guitars Ltd | Wholesale & retail | 2012 |
| Saint Lawrence Church of England Primary School Hurstpierpoint | Education | 2013 |
| Saito Works Limited | Wholesale & retail | 2018 |
| Sales Gym 360 Limited | Professional & scientific | 2015 |
| Samdiar Limited | Real estate | 2012 |
| Samphire Studios Ltd | Other services | 2020 |
| Samtal Sussex Ltd | Professional & scientific | 2012 |
| Samwheel Ltd | Transport & logistics | 2023 |
| Sandridge Media Ltd | Professional & scientific | 2017 |
| Sandy Lane Conservation Co-Operative CIC | Households | 2013 |
| Sanskar Ltd | Health & social care | 2010 |
| Sansom Unlimited Limited | Other services | 2019 |
| Sapien Training Ltd | Arts & recreation | 2021 |
| Satnav Systems (UK) Ltd | Wholesale & retail | 2009 |
| Satnav Systems Limited | Extraterritorial | 2006 |
| Satnav Systems Logistics (UK) Ltd | Transport & logistics | 2010 |
| Saulire Services Ltd | Information & communication | 2016 |
| Savvy Procurement Ltd | Professional & scientific | 2024 |
| Sayad Investments Ltd | Real estate | 2007 |
| Sazali Limited | Administrative & support | 2024 |
| Scao Interests Ltd | Professional & scientific | 2011 |
| Scarlet Oak Properties Ltd | Real estate | 2016 |
| SCH Landscapes Limited | Administrative & support | 2012 |
| Science Tutors Surrey Ltd | Education | 2025 |
| SDL Elite Security Ltd | Administrative & support | 2024 |
| SDS Contractors Ltd | Administrative & support | 2022 |
| Sea View Agency Services Ltd | Professional & scientific | 2014 |
| Seaholme Marquees Limited | Hospitality | 2000 |
| Second Layer Ltd | Wholesale & retail | 2025 |
| Secret Hills Limited | Financial services | 2010 |
| SECRET2FITNESS Ltd | Arts & recreation | 2025 |
| SECTOR7 Consultancy Ltd | Professional & scientific | 2025 |