| Prosser Historics Ltd | Wholesale & retail | 2018 |
| Protection Products Limited | Financial services | 2023 |
| Proto (PR) Ltd | Information & communication | 2015 |
| Psychologically Informed Ltd | Professional & scientific | 2016 |
| PTS (UK) Ltd | Professional & scientific | 2013 |
| PUB 31 Ltd | Hospitality | 2022 |
| Public Convenience Limited | Information & communication | 2018 |
| Publisher's Toolbox Ltd | Information & communication | 1960 |
| Pulse Capital Limited | Real estate | 2022 |
| Puppuccino Properties Limited | Real estate | 2021 |
| Pure Shiners South East Limited | Administrative & support | 2020 |
| Purely Solutions Limited | Agriculture & fishing | 2013 |
| Purley Beds Limited | Wholesale & retail | 2013 |
| Pyroporte Limited | Public administration | 2018 |
| Qhair Ltd | Other services | 2026 |
| Qookingtable Limited | Information & communication | 2014 |
| Quality Student Landlords Ltd (QSL) Limited | Real estate | 2016 |
| Quest Place Limited | Real estate | 2014 |
| Quinn Forestry Limited | Agriculture & fishing | 2021 |
| Quolight Limited | Professional & scientific | 2021 |
| Quosun Limited | Wholesale & retail | 2026 |
| R & J Rail Services Limited | Manufacturing | 2014 |
| R & R Brickwork and Construction Limited | Construction | 2020 |
| R & R Education Limited | Education | 2014 |
| R D Griffen Hose & Hydraulics Ltd | Wholesale & retail | 2021 |
| R G Williams & Co (Maintenance) Limited | Construction | 2005 |
| R&J Properties Sussex Ltd | Real estate | 2021 |
| R.B Drilling Services Ltd | Construction | 2024 |
| RAJ Tanna Consultancy Limited | Real estate | 2016 |
| Rampion Homes (RYE Harbour) Ltd | Construction | 2020 |
| Rampion Homes Limited | Construction | 2023 |
| Rapid Response Property Ltd | Real estate | 2022 |
| RAY Konya Ltd | Transport & logistics | 2024 |
| Rayford Court (Bexhill) Management Limited | Households | 1988 |
| RCC Property Services Limited | Construction | 2018 |
| RDG Engineering Limited | Wholesale & retail | 2016 |
| Realdelia Communications Ltd | Professional & scientific | 2021 |
| Red Fire Systems Ltd | Administrative & support | 2018 |
| Redoak IT Ltd | Information & communication | 2017 |
| Redplumm International Limited | Information & communication | 2020 |
| Reeves Grasshoppers Limited | Administrative & support | 2016 |
| Reid Pope Associates Limited | Other services | 2006 |
| Reliable Recovery (Eastbourne) Limited | Wholesale & retail | 2020 |
| Remarkable Things Limited | Professional & scientific | 2018 |
| Removals Clearances Ltd | Transport & logistics | 2021 |
| Rena Loizou Coaching & Consultancy Limited | Professional & scientific | 2021 |
| Rendle's "Little Coffee" Limited | Hospitality | 2025 |
| Rent IT Limited | Real estate | 2000 |
| Republic Arts CIC | Arts & recreation | 2025 |
| Resi Consultants Ltd. | Real estate | 2024 |
| Retail Inspired Limited | Other services | 2018 |
| Revamp Building Solutions Limited | Construction | 2025 |
| Revive Exterior Cleaning Limited | Administrative & support | 2014 |
| Reynolds Hardware Limited | Wholesale & retail | 2016 |
| RF Investements Ltd | Construction | 2025 |
| Richmond and Stanhope Holdings Limited | Financial services | 2024 |
| Riddy Golf Limited | Arts & recreation | 2022 |
| Riders Bolt (Bexhill) Limited | Extraterritorial | 2005 |
| Riders Bolt Residents Company Limited | Households | 2014 |
| Ridgeway Court RTM Company Limited | Households | 2009 |
| Rift Gaming Ltd | Manufacturing | 2025 |
| Right to Enfranchise Limited | Households | 2007 |
| Ringwood Lodge Residents Association Limited | Households | 1962 |
| Rise Drive School Ltd | Education | 2020 |
| River Oaks Apartments Management Limited | Households | 2002 |
| Rivercentre (UK) Limited | Arts & recreation | 2014 |
| Riverglen Property Group Ltd | Real estate | 2025 |
| Riviera Terrace Management Company Limited | Households | 1984 |
| RM 1 Properties Ltd | Real estate | 2025 |
| Rmptuk Limited | Wholesale & retail | 2020 |
| RMS Travel Ltd | Administrative & support | 2023 |
| Roadside Assist Sussex Ltd | Wholesale & retail | 2026 |
| Roca Abode (UK) Ltd | Households | 2021 |
| Roca Abode LLP | | 2021 |
| Rochester (Futures) Limited | Real estate | 2017 |
| Rock Financial Advisors Ltd | Administrative & support | 2015 |
| Rock Rose Beauty by VRL Ltd | Other services | 2018 |
| Rock-A-Nore Fisheries Limited | Wholesale & retail | 2021 |
| Rocksalt Holdings Limited | Financial services | 2021 |
| Rocksalt on Sea Ltd | Hospitality | 2015 |
| Rojim Limited | Health & social care | 2020 |
| Romney Court Residents Association Limited | Households | 1950 |
| Rondeen Electrical Limited | Manufacturing | 2016 |
| Room One Experimentation & Innovation Limited | Arts & recreation | 2023 |
| Rosa Advisory Ltd | Professional & scientific | 2019 |
| Rosemeath Properties Ltd | Real estate | 2023 |
| Rosewood Park Bexhill Residents Management Company Limited | Households | 2017 |
| Rosewood Staffing Ltd | Health & social care | 2018 |
| Rother Bookkeepers Ltd. | Professional & scientific | 2015 |
| Rother DC Housing Company Ltd | Construction | 2020 |
| Rother Grill Sidley Kebab Ltd | Hospitality | 2021 |
| Rother Media | Professional & scientific | 2015 |
| Rotherfield Ltd | Real estate | 2021 |
| Rough Magic Limited | Arts & recreation | 2024 |
| Rowe Lifts Limited | Transport & logistics | 2016 |
| Rowland Smith Limited | Extraterritorial | 2000 |
| RPM Construction & Renovation Ltd | Construction | 2025 |
| RPO Properties Ltd | Real estate | 2019 |
| Rqbs Ltd | Construction | 2023 |
| Rubberbuild Construction&Roofing Ltd | Administrative & support | 2017 |