| Rose Cleaver Ltd | Other services | 2011 |
| Rose Green Brick Co.,Limited | Construction | 1925 |
| Rose Petal Cake Company Ltd | Manufacturing | 2022 |
| Roshnii Interiors Ltd | Professional & scientific | 2025 |
| Rosshipping Ltd | Transport & logistics | 2024 |
| Rotair Limited | Other services | 2015 |
| Rother Valley Croquet Club CIC | Arts & recreation | 2022 |
| Rough House Limited | Professional & scientific | 1998 |
| Roundle Residents' Association Limited (the) | Households | 1968 |
| Rowandon Limited | Agriculture & fishing | 1981 |
| Rowdon Properties Limited | Real estate | 1960 |
| Rower Ltd | Administrative & support | 2022 |
| ROX Box Catering Ltd | Hospitality | 2023 |
| ROY Owen Roberts Limited | Other services | 2012 |
| Royall Appointments Ltd | Administrative & support | 2009 |
| Roydon Investments Limited | Administrative & support | 2008 |
| RS Group Training Ltd | Education | 2023 |
| RSC (Bognor) Ltd | Transport & logistics | 2017 |
| RSD Medical Limited | Health & social care | 2021 |
| RSJ Accountants Ltd | Professional & scientific | 2020 |
| RSJ Salvage Ltd | Wholesale & retail | 2019 |
| Rsmr Investments Ltd | Extraterritorial | 2023 |
| Rsmr Ltd | Real estate | 2015 |
| Rsvg Limited | Hospitality | 2026 |
| RTT Holdings South Ltd | Financial services | 2021 |
| RTT Services South Ltd | Administrative & support | 2021 |
| Ruddock Capital Ltd | Real estate | 2024 |
| Ruffels UK Limited | Real estate | 2018 |
| Rugbyrapt Limited | Information & communication | 2024 |
| Ruld Limited | Professional & scientific | 2025 |
| RUME2 Limited | Real estate | 2018 |
| Runacre Limited | Real estate | 2001 |
| Runcton Pathology Limited | Health & social care | 2016 |
| Runway CRM Solution's Limited | Information & communication | 2026 |
| Ruralspace Limited | Real estate | 2025 |
| Rushcavern Limited | Real estate | 1983 |
| Ruskin Close Residents Association Limited | Households | 2001 |
| Ruskin Enterprises Limited | Extraterritorial | 2020 |
| Russell & Associates Limited | Administrative & support | 2015 |
| Russells Garden Centre Ltd | Extraterritorial | 1946 |
| Russellsonline Ltd | Wholesale & retail | 2017 |
| Russet Consulting Limited | Professional & scientific | 2020 |
| Rust 2 Refresh Ltd | Wholesale & retail | 2023 |
| Rustell Associates Ltd | Professional & scientific | 2017 |
| Rustington & Arundel Home Care Ltd | Health & social care | 2025 |
| Rusty Well Park Limited | Real estate | 1964 |
| Ryan Westwood Limited | Manufacturing | 2019 |
| S & D Electrical Services Limited | Construction | 1996 |
| S & M Communications Ltd | Other services | 2020 |
| S & S Marden Limited | Administrative & support | 2009 |
| S & S Steel Fixing Limited | Construction | 1996 |
| S and B Trade Services Limited | Wholesale & retail | 1989 |
| S and J Bakose Limited | Hospitality | 2012 |
| S B Aviation Limited | Professional & scientific | 2015 |
| S F Terry Building Contractors Ltd | Construction | 2024 |
| S J Gonnella Ltd | Other services | 2021 |
| S L Bentley Bathroom Fitting Ltd | Construction | 2011 |
| S R Francis Ltd | Construction | 2016 |
| S T Research Limited | Administrative & support | 2005 |
| S&L Land and Planning Services Limited | Professional & scientific | 2025 |
| S&R Group Developments Ltd | Construction | 2025 |
| S&R Group Limited | Construction | 2019 |
| S&R Interiors Limited | Manufacturing | 2016 |
| S&R Interiors Special Projects Limited | Construction | 2025 |
| S. M. Forbes and Sons Ltd | Construction | 2019 |
| S. R. C. Recycling Limited | Water & waste | 2003 |
| S. Salbstein Limited | Agriculture & fishing | 1996 |
| S. T. Cowley Contractors Ltd | Construction | 2001 |
| S.D. Howells (Property) Ltd | Real estate | 2018 |
| S.J. Cobden Ltd | Construction | 2003 |
| S.L.S Groundworks Ltd | Construction | 2019 |
| S1 Consulting Ltd | Professional & scientific | 2025 |
| Saakshis PP Limited | Hospitality | 2022 |
| Sabre Services Group Ltd | Professional & scientific | 2024 |
| Sacred YOU Ltd | Health & social care | 2026 |
| Sadler Energy and Environmental Services Limited | Administrative & support | 2008 |
| Sadler Enterprises (Chichester) Ltd. | Extraterritorial | 1983 |
| Sadlers Warehouse Management Company Limited | Households | 2016 |
| Sadlesea Communications Limited | Wholesale & retail | 2019 |
| Sadlesea Limited | Information & communication | 2017 |
| Safe-C Ltd | Administrative & support | 2006 |
| Safesavvy Ltd | Education | 2013 |
| Safety & FUN for ALL CIC | Education | 2026 |
| Safety Belt Solutions Limited | Administrative & support | 2011 |
| Safetylet Direct Limited | Professional & scientific | 2025 |
| Safetylet Limited | Information & communication | 2011 |
| Saffron Artisan Studios Ltd | Wholesale & retail | 2024 |
| Sage Acquisitions Limited | Real estate | 2020 |
| Saigon Munchbox LLP | | 2022 |
| Sailboat Deliveries Limited | Administrative & support | 2002 |
| Sailing Faster Yacht Charters Limited | Construction | 2007 |
| Saku Psychology Ltd | Health & social care | 2025 |
| Salamons Law Limited | Professional & scientific | 2019 |
| Sales Consulting Solutions Limited | Information & communication | 2012 |
| Salinas Capital Limited | Financial services | 2025 |
| Salisbury Support Services Limited | Health & social care | 2008 |
| Salivate Ltd | Wholesale & retail | 2024 |
| Salmon Event Evolution Ltd | Professional & scientific | 2015 |
| Salolach Childcare Limited | Health & social care | 2009 |
| Salone Events Ltd | Information & communication | 2020 |