| Petsmiths Limited | Professional & scientific | 2016 |
| Pharro Ltd | Construction | 2023 |
| Phase 52 Limited | Administrative & support | 2018 |
| Phil Davies Contracting Ltd | Construction | 2012 |
| Phil Davies Property Ltd | Construction | 2025 |
| Phoenix Heat Treatment Ltd | Manufacturing | 2023 |
| Pine Economics Ltd | Professional & scientific | 2025 |
| Pitch Black Lighting Limited | Construction | 2004 |
| Pizza Hayling Ltd | Hospitality | 2024 |
| Please the Trees Limited | Transport & logistics | 2016 |
| Pmcq Consulting Ltd | Professional & scientific | 2016 |
| PMH GAS and Electrical Limited | Construction | 2001 |
| Powertech Marine Limited | Wholesale & retail | 2004 |
| PP Training Limited | Information & communication | 2023 |
| PRC Data and AV Services Ltd | Construction | 2008 |
| Precision Therapy Limited | Other services | 2025 |
| Premiersquare Limited | Households | 1989 |
| Prep N Paint Ltd | Wholesale & retail | 2017 |
| Prime Bridge Trading Ltd | Wholesale & retail | 2026 |
| Prinsted Holdings Ltd | Real estate | 2019 |
| Printtrak Pro Ltd | Information & communication | 2023 |
| Privett Road Development Ltd | Construction | 2024 |
| Puffin Billy Vapes Ltd | Wholesale & retail | 2018 |
| Pure Heart Care Limited | Health & social care | 2026 |
| Qintell Ltd | Information & communication | 2011 |
| Qualitas Property Services Limited | Construction | 2016 |
| Quanttek Ltd | Administrative & support | 2009 |
| Queensberry Investments Limited | Real estate | 2021 |
| R and K Property Holdings Ltd | Real estate | 2019 |
| R.J.Wheeler Builders Limited | Construction | 2026 |
| R.W. Airconditioning Limited | Wholesale & retail | 2004 |
| Ramsbottom Consultancy (UK) Limited | Professional & scientific | 2011 |
| Rannoch Consultancy Limited | Professional & scientific | 2016 |
| Rcxs Ltd | Manufacturing | 2026 |
| RE: Design Consultancy Limited | Professional & scientific | 2009 |
| Rebelle Creative Ltd | Professional & scientific | 2024 |
| Reck Consultancy Ltd | Construction | 2026 |
| Red House Interiors Limited | Other services | 2003 |
| Red Marble Consulting Limited | Information & communication | 2011 |
| Refined Removals Southern Ltd | Transport & logistics | 2025 |
| Refined Waste Management Limited | Administrative & support | 2025 |
| Refraction Ltd | Wholesale & retail | 2025 |
| Remx Ltd | Information & communication | 2017 |
| Resolution Design and Compliance Ltd | Professional & scientific | 2026 |
| RHK Investments Limited | Real estate | 2023 |
| Rjba Design Studio Limited | Professional & scientific | 2020 |
| RJG Project Management Solutions (UK) Limited | Professional & scientific | 2017 |
| RJH Residential Surveying Ltd | Professional & scientific | 2021 |
| RK Partners Limited | Professional & scientific | 2013 |
| Rogers and Harbach Properties Limited | Real estate | 2024 |
| Romans of Farnham Limited | Professional & scientific | 1986 |
| Romney AVE Limited | Real estate | 2025 |
| Rook Farm Management Company Limited | Households | 2005 |
| Rowlands Castle Builders Ltd | Manufacturing | 2012 |
| Rowlands Harte Decorating Contractors Ltd | Construction | 2025 |
| Rutters Racing Limited | | 1974 |
| Rydal Estate (Staffs) Ltd | Real estate | 2025 |
| S Brighten Brickwork Limited | Construction | 2017 |
| S.G. Weldtech Ltd | Construction | 2013 |
| S.L. Yachting Limited | Administrative & support | 2006 |
| S.R.S. Facilities Limited | Construction | 2007 |
| Sadek Surgical Limited | Health & social care | 2019 |
| Sage Planning & Design Limited | Professional & scientific | 2026 |
| Sailing Club Software Limited | Information & communication | 2012 |
| Saltstay Ltd | Real estate | 2025 |
| Sam's Sunflowers Limited | Agriculture & fishing | 2020 |
| SAN Anton Court Management Company Limited | Extraterritorial | 1998 |
| Sapphire HR Consultancy Limited | Administrative & support | 2010 |
| SAS Lane Limited | Real estate | 2018 |
| Sawdust Academy Ltd | Manufacturing | 2024 |
| SE22 Developments Limited | Construction | 2015 |
| Sea Front Holdings (Hayling Island) Limited | Households | 1962 |
| Seacourt Tennis Club Limited | Arts & recreation | 1966 |
| Seafront Apartments Management Company Limited | Real estate | 2000 |
| Sean Mason Electrical Services Limited | Construction | 2025 |
| Search Environmental Engineering Limited | Professional & scientific | 2021 |
| Seaspace Homes Ltd | Construction | 2022 |
| Security Staffing Solutions Ltd | Administrative & support | 2021 |
| SEG Glass Ltd | Manufacturing | 2016 |
| Setford Property Services Limited | Real estate | 2020 |
| Shemaa Limited | Real estate | 2013 |
| Shishang Limited | Hospitality | 2026 |
| Shoefix Limited | Other services | 2004 |
| Shore Cleaning (& Maintenance) Ltd | Other services | 2024 |
| SHREEJI2023 Ltd | Real estate | 2023 |
| Simjen Limited | Information & communication | 2010 |
| Simplex Pools Limited | Construction | 2014 |
| Simplex Swimming Pools Limited | Construction | 2017 |
| Sinah House Management Company Limited | Households | 1996 |
| Sivakumar Limited | Transport & logistics | 2014 |
| SJT Electrical Services Limited | Construction | 2003 |
| Skeg Limited | Real estate | 1996 |
| Skyline Executive Travel Ltd | Transport & logistics | 2025 |
| Sleep First Ltd | Professional & scientific | 2018 |
| Small Boat Services Ltd | Manufacturing | 2022 |
| Smart Repair South Coast Limited | Administrative & support | 2015 |
| Smcdental Limited | Health & social care | 2025 |
| Smithers Projects Ltd | Professional & scientific | 2023 |
| Social Work Southern Limited | Health & social care | 2011 |
| Solar Solutions Southern Ltd | Construction | 2025 |