| Protons Relief Ltd | Other services | 2025 |
| Pseb Ltd | Construction | 2025 |
| PTS Training Ltd | Transport & logistics | 2024 |
| Ptyler Ltd | Construction | 2025 |
| Purely Porsche Hub Limited | Wholesale & retail | 2022 |
| Purelyporsche.Com Hub Limited | Wholesale & retail | 2022 |
| Purplecrats Limited | Other services | 2025 |
| Quantiva AI Limited | Information & communication | 2025 |
| Quartet Enterprise and Development Ltd | Health & social care | 2017 |
| Queenet Multiservice Ltd | Administrative & support | 2021 |
| Qwantsinc Limited | Financial services | 2020 |
| R K Interior Design Ltd | Manufacturing | 2020 |
| R.D.Peters Limited | Professional & scientific | 1957 |
| R2 Corporate Limited | Wholesale & retail | 2025 |
| Rakesh Kumar Ltd | Construction | 2026 |
| Ralex Capital Development Limited | Financial services | 2020 |
| Ralex Construction Limited | Construction | 2020 |
| Ramesh Chandra Ltd | Construction | 2025 |
| Rangeetha Ltd | Wholesale & retail | 2022 |
| Rasheda's Cakery Limited | Hospitality | 2016 |
| Ratson Limited | Health & social care | 2018 |
| Raydam Limited | Real estate | 2024 |
| Rayshairhub Ltd | Other services | 2023 |
| Rcustoms Belvedere Ltd | Wholesale & retail | 2023 |
| Red One Barbers Ltd | Other services | 2017 |
| Redline Construction Group Ltd. | Construction | 2017 |
| Regibea Care Limited | Health & social care | 2019 |
| Reimagine Learning Limited | Professional & scientific | 2024 |
| Renovity Ltd | Other services | 2023 |
| Reohoboth Consultancy Ltd | Professional & scientific | 2014 |
| Reohoboth Real Estate Limited | Real estate | 2023 |
| Repace Services Limited | Hospitality | 2018 |
| Resonance Energy Wear Ltd | Manufacturing | 2024 |
| Retail Technology Ltd | Wholesale & retail | 2019 |
| Retep Ltd | Construction | 2025 |
| Richard LEE Analytics Limited | Information & communication | 2026 |
| Ridi's Rental Limited | Real estate | 2024 |
| Right Property Investment Limited | Real estate | 2018 |
| Rise & Glow Births Ltd | Education | 2023 |
| Rise & Shine Home Care Services Ltd | Health & social care | 2025 |
| Rising Star Resourcing Ltd | Professional & scientific | 2026 |
| River Esolutions Limited | Information & communication | 2013 |
| River Recordings Limited | Wholesale & retail | 1995 |
| River Solutions Group Limited | Information & communication | 2015 |
| Riverdigitalsolutions Ltd | Information & communication | 2015 |
| Riverpro Limited | Wholesale & retail | 2014 |
| Riverview Court (Hoddesdon Road) Management Limited | Administrative & support | 1972 |
| Rixy Plumbing&Heating Ltd | Construction | 2021 |
| RJR Construction Ltd | Construction | 2021 |
| RMC Property Group Ltd | Real estate | 2025 |
| Robert Burke Ltd | Information & communication | 2024 |
| Robert RM Services Solutions Ltd | Transport & logistics | 2022 |
| ROJ Recycling Ltd | Wholesale & retail | 2023 |
| Romanian Work Limited | Construction | 2017 |
| Rombi's Group Limited | Wholesale & retail | 2021 |
| Romica Transport Ltd | Transport & logistics | 2023 |
| ROOM4THOUGHT.CO.UK Limited | Manufacturing | 2006 |
| Roots & Heritage Ltd | Wholesale & retail | 2016 |
| Roots of Spice Limited | Hospitality | 2022 |
| Rothmas@Medical Supplier Limited | Health & social care | 2023 |
| RP Maintenance Ltd | Construction | 2026 |
| Rpms Services Ltd | Administrative & support | 2023 |
| RSK Consultants Limited | Administrative & support | 2012 |
| Runway Cakes Ltd | Manufacturing | 2020 |
| Ryesami Resources Ltd | Administrative & support | 2020 |
| RYR Ltd | Professional & scientific | 2025 |
| S J Facey & Company Limited | Real estate | 1992 |
| S Pro London Ltd | Other services | 2025 |
| S&D Construcsion Ltd | Construction | 2019 |
| S&G Cash and Carry Ltd | Wholesale & retail | 2025 |
| S&G Groupe Ltd | Wholesale & retail | 2024 |
| S&S Fire Protection Ltd | Construction | 2020 |
| S&S Halal Food Ltd | Hospitality | 2025 |
| S&S Sidhu Construction Ltd | Construction | 2023 |
| S4T Ventures Ltd | Professional & scientific | 2014 |
| Safe and Sound Solution Ltd | Households | 2021 |
| Safe Solution Contractor Limited | Construction | 2022 |
| Safesmart Access Ltd | Extraterritorial | 2013 |
| Sajecg Ltd | Professional & scientific | 2024 |
| Sall Building & Electrical Contractors Limited | Construction | 2023 |
| SAM and Emily Kanu UK Development Project CIC | Other services | 2024 |
| Samah Ltd | Real estate | 2022 |
| Samdavine Ltd | Extraterritorial | 2016 |
| Sandbox Game Ltd | Wholesale & retail | 2024 |
| Sandhu A1 Construction Ltd | Construction | 2023 |
| Sandhu Drylining Ltd | Construction | 2021 |
| Sangam Hair & Beauty Limited | Other services | 2024 |
| Sanj London Ltd | Construction | 2022 |
| Sankofa Services UK Limited | Construction | 2015 |
| Saucyboo.Com Ltd | Administrative & support | 2017 |
| Savannah Home Care Services Ltd | Administrative & support | 2018 |
| Sawyerr Care Service Ltd | Health & social care | 2013 |
| SAY Grace LDN. Ltd | Wholesale & retail | 2025 |
| SBI 7 Ltd | Construction | 2026 |
| SCC Roofing & Building Services Ltd | Construction | 2017 |
| Scheuch Developments Ltd | Construction | 2006 |
| Scintillating Incorporation Ltd | Professional & scientific | 2021 |
| Scorpions Telecommunication Limited | Information & communication | 2023 |
| Sea Hawk 88 Ltd | Transport & logistics | 2020 |
| Seatan Computer Services Limited | Information & communication | 2009 |