| POM Care Ltd | Health & social care | 2023 |
| Potters Kiln Residents Management Company Limited | Households | 2018 |
| Praxis Media Limited | Professional & scientific | 2010 |
| Premier Energy (Holdings) Limited | Financial services | 2019 |
| Premier Energy Mapping Limited | Professional & scientific | 2014 |
| Premier Energy Searches Ltd | Extraterritorial | 2022 |
| Premier Energy Services Limited | Professional & scientific | 1995 |
| Premier Energy Surveys Ltd | Extraterritorial | 2007 |
| Premier UIL (Holdings) Limited | Financial services | 2025 |
| Premium Car Storage Ltd | Real estate | 2022 |
| Prime Light Electrical Limited | Wholesale & retail | 1992 |
| Prime Paintworks Ltd | Wholesale & retail | 2016 |
| Productbyproduct Ltd | Information & communication | 2025 |
| Project Options Ltd | Administrative & support | 2007 |
| Property Holmes Ltd | Real estate | 2021 |
| Propertysmiths Estates Limited | Real estate | 2021 |
| PS CTB Limited | Wholesale & retail | 2025 |
| PS Heating Solutions Ltd | Construction | 2026 |
| PS Lifestyle Group Ltd | Manufacturing | 2018 |
| Pulse Connections Ltd | Information & communication | 2022 |
| Pure GEN Limited | Professional & scientific | 2024 |
| Purely Sport Ltd | Arts & recreation | 2009 |
| Quartet Family Office Ltd | Wholesale & retail | 2020 |
| Quod Erat Demonstrandum Limited | Manufacturing | 1997 |
| R&L Property Group Ltd | Real estate | 2022 |
| R.C.Projects Limited | Wholesale & retail | 2013 |
| Radiotone Records Limited | Information & communication | 2002 |
| Randmore Limited | Real estate | 2004 |
| Randor Limited | Financial services | 2003 |
| Randsave Limited | Real estate | 2003 |
| Randshore Limited | Financial services | 2003 |
| Rashbrooke Limited | Information & communication | 2018 |
| Raven and Bell Ltd | Professional & scientific | 2022 |
| Ravila Limited | Administrative & support | 2002 |
| RB Whitfield UK Ltd | Professional & scientific | 2002 |
| RD Wired Electrical Services Limited | Construction | 2022 |
| Reconnect Collective CIC | Education | 2016 |
| Red Plume Ltd | Wholesale & retail | 2021 |
| Redhill Garden Community Limited | Real estate | 2016 |
| Redwings Consultants Limited | Professional & scientific | 2014 |
| Redwood Roofing & Building Ltd | Construction | 2024 |
| Relay Interactive Ltd | Professional & scientific | 2024 |
| Renegades Youth Enterprises CIC | Other services | 2024 |
| Reventropy Ltd | Professional & scientific | 2024 |
| Revitalise & Restore Limited | Wholesale & retail | 2025 |
| Revival Automotive Ltd | Wholesale & retail | 2013 |
| Revolution Cycle Sport Ltd | Wholesale & retail | 2020 |
| REX Williams Ltd | Financial services | 1948 |
| RH20 Limited | Arts & recreation | 2023 |
| Richard D a Burge Ltd | Professional & scientific | 2024 |
| Richardson Rail Services Ltd | Construction | 2007 |
| Richardson Real Estate Ltd | Real estate | 2017 |
| Richmonds Trading Limited | Wholesale & retail | 2025 |
| Rival Strength Ltd | Wholesale & retail | 2020 |
| Rivendell Ifold Management Company Limited | Real estate | 2001 |
| Roadmark Travel Limited | Transport & logistics | 1994 |
| Rowland Murray Ltd | Professional & scientific | 2011 |
| Rrnd Motor Clubs Limited | Arts & recreation | 2015 |
| Rrrhs Ltd | Construction | 2024 |
| Rugged Vista Limited | Information & communication | 2021 |
| Russett Place Management Company Limited | Households | 2007 |
| S.D.H Roofing & Building Ltd | Construction | 2023 |
| Safety (UK) Limited | Professional & scientific | 2009 |
| Safety GB Ltd | Professional & scientific | 2009 |
| Saffron Indian Takeaway (Sussex) Ltd | Hospitality | 2018 |
| Saftech Investments Limited | Financial services | 2024 |
| Sapcom HV Engineering Ltd | Construction | 2023 |
| Sarah Jordan Associates Limited | Professional & scientific | 2019 |
| Sarmecanic Limited | Professional & scientific | 2014 |
| SAS Global Holdings Limited | Financial services | 2018 |
| SAS Security Products Ltd | Manufacturing | 1992 |
| Saucy COW Ltd | Hospitality | 2021 |
| Saville Court RTM Company Limited | Households | 2025 |
| Sawyer Corporate Ventures Limited | Professional & scientific | 1995 |
| Sccs Accounting Services Limited | Professional & scientific | 2014 |
| Seachangers Limited | Professional & scientific | 2019 |
| Seagroveppd Ltd | Information & communication | 2025 |
| Sean Allfrey Limited | Construction | 2014 |
| Self Cultivation Ltd | Financial services | 2005 |
| Serious Child Music Ltd | Information & communication | 2017 |
| Shades of Cool London Limited | Wholesale & retail | 2021 |
| Shake & Pour Ltd | Hospitality | 2025 |
| SHE Runs Outdoors Ltd | Arts & recreation | 2019 |
| Sheldrick Trading Limited | Wholesale & retail | 2020 |
| Sheldrick Wildlife Trust UK | Administrative & support | 2003 |
| Shiraz Investments Limited | Hospitality | 2002 |
| Silvester Engineering Limited | Manufacturing | 1993 |
| Simmons Place (Ifold) Management Company Limited | Households | 2011 |
| Sinclair Communications Limited | Professional & scientific | 2012 |
| SKA Building and Construction Ltd | Construction | 2024 |
| Skin Defence Holding Ltd | Financial services | 2024 |
| Skin Defence Limited | Manufacturing | 2014 |
| Skyshepherd Aviation Limited | Wholesale & retail | 2015 |
| Sleek Corner Ltd | Wholesale & retail | 2024 |
| Slime Belief Ltd | Manufacturing | 2025 |
| SM Beckett Limited | Professional & scientific | 2014 |
| SMA Services Ltd | Other services | 2024 |
| Small Rumivet Services Ltd | Professional & scientific | 2017 |
| Smart Disputes Limited | Professional & scientific | 2020 |
| Smash Panda Ltd | Information & communication | 2026 |