| RS UK Investments Ltd | Real estate | 2022 |
| RSK Homes Limited | Real estate | 2020 |
| RSK Projects Ltd | Construction | 2019 |
| RST Refrigeration Ltd | Manufacturing | 2017 |
| RT Advanced Scaffolding Limited | Construction | 2021 |
| RTB Compliance Ltd | Professional & scientific | 2022 |
| RTS Properties Ltd | Real estate | 1999 |
| Rubello Limited | Arts & recreation | 2009 |
| Rubixkubix Ltd | Information & communication | 2023 |
| Rugbykids West Kent Limited | Arts & recreation | 2024 |
| Rugbytots Bristol and Bath LLP | | 2025 |
| Rugbytots Holdings Limited | Financial services | 2019 |
| Rugbytots North Staffordshire and Derbyshire Ltd | Arts & recreation | 2025 |
| Rugbytots SE London LLP | | 2022 |
| Rugbytots South LLP | | 2018 |
| Rugbytots West Kent LLP | | 2026 |
| Rumble Fish Limited | Professional & scientific | 2024 |
| Runway Angels Ltd | Wholesale & retail | 2026 |
| Rushing Health Limited | Health & social care | 2015 |
| Russ Building Ltd | Construction | 2015 |
| RWJ Ltd | Construction | 2025 |
| Rydan Glazing Ltd | Construction | 2016 |
| Rykk Contracts Ltd | Construction | 2013 |
| Ryzon Investments Limited | Real estate | 2025 |
| S & I Stars Ltd | Hospitality | 2021 |
| S & L Properties Mansfield Limited | Real estate | 2017 |
| S & N Food Enterprises Limited | Manufacturing | 2019 |
| S & S Candy Catering Company Ltd | Hospitality | 2020 |
| S and M Hyland Properties Limited | Real estate | 2024 |
| S BAI Practice Ltd | Health & social care | 2024 |
| S J Cicco Consulting Ltd | Professional & scientific | 2023 |
| S K & B Partners Ltd | Hospitality | 2025 |
| S R Electrical Herts Limited | Construction | 2024 |
| S Simas Limited | Transport & logistics | 2017 |
| S&F Tech Ltd | Information & communication | 2020 |
| S&I Property Investments Limited | Real estate | 2019 |
| S&K Security Limited | Administrative & support | 2025 |
| S&L Building & Maintenance Limited | Construction | 2021 |
| S-Cape Homes Ltd | Real estate | 2025 |
| S.A Tiling Ltd | Construction | 2018 |
| S.A. London Properties Limited | Real estate | 2019 |
| S.Ferry Heating & Plumbing Ltd | Construction | 2025 |
| SAB Scrap Metals Ltd | Water & waste | 2025 |
| Sabb Brothers Construction Ltd | Construction | 2016 |
| Sabb Construction (London) Limited | Construction | 2022 |
| Sabir Management Limited | Real estate | 2026 |
| Sacha Properties Ltd | Real estate | 2026 |
| Sacombe Road Management Company Limited | Households | 2011 |
| Sadek R & Co Ltd. | Wholesale & retail | 2023 |
| Sadent UK Limited | Health & social care | 2019 |
| Saemisah Ltd | Professional & scientific | 2018 |
| Safe & Sound Ultrasound Ltd | Health & social care | 2025 |
| Safer Property Holdings LLP | | 2025 |
| Safer Property Services Ltd | Construction | 2022 |
| SAG Services Ltd | Construction | 2022 |
| Sahara and Milan Ltd | Professional & scientific | 2024 |
| SAI Motor Trading Ltd | Wholesale & retail | 2018 |
| SAI Prem Ltd | Wholesale & retail | 2020 |
| Saif Trade Limited | Wholesale & retail | 2016 |
| Sailing Home Ltd | Information & communication | 2025 |
| Salad Fresh Limited | Agriculture & fishing | 2024 |
| Salisbury Developments Limited | Construction | 2021 |
| Sally Foster Theatre School Ltd | Arts & recreation | 2017 |
| Salsar Limited | Real estate | 2018 |
| Salt AV Media Solution Ltd | Wholesale & retail | 2025 |
| SAM Wedderburn Limited | Professional & scientific | 2025 |
| Sama UK Properties Ltd | Real estate | 2022 |
| Samag Investments Limited | Real estate | 2025 |
| Samax Investments Limited | Real estate | 2020 |
| Samphire Bespoke Ltd | Construction | 2021 |
| Samphire Design & Build Limited | Construction | 2014 |
| SAN Management London Ltd | Real estate | 2023 |
| Sand Management Company Limited | Extraterritorial | 1995 |
| Sandhu Ventures Ltd | Wholesale & retail | 2024 |
| Sandnmarketingsolutions.Co.Uk Ltd | Professional & scientific | 2025 |
| Sanli Electrical Ltd | Manufacturing | 2020 |
| Sanvaro Limited | Real estate | 2026 |
| Sapphire Cippenham Limited | Other services | 2022 |
| Sarah KAV Limited | Professional & scientific | 2020 |
| Sarino Care Ltd | Health & social care | 2022 |
| Sarudzai Investments Ltd | Real estate | 2024 |
| Satsaz Holding Limited | Real estate | 2025 |
| Saules Finance Limited | Professional & scientific | 2025 |
| Savanna Stays Ltd | Real estate | 2025 |
| Savas Catering Limited | Hospitality | 2008 |
| Savci Homemade Ltd | Hospitality | 2021 |
| Save My Appliance Limited | Other services | 2015 |
| Save on Supplies Ltd | Wholesale & retail | 2024 |
| Saveonkit Ltd | Wholesale & retail | 2020 |
| Savva Property Group Ltd | Real estate | 2023 |
| Saxana UK Limited | Administrative & support | 2015 |
| SAY UK Properties Ltd | Real estate | 2024 |
| Sayar Design Ltd | Professional & scientific | 2025 |
| SC Decorating Limited | Construction | 2025 |
| SC Plastering Limited | Construction | 2025 |
| SC Redwood Limited | Financial services | 2025 |
| Scale Seeker Ltd | Professional & scientific | 2025 |
| Scan Print (International) Limited | Information & communication | 2015 |
| Scan Print (UK) Limited | Information & communication | 2009 |
| Scanner-Rhodes Productions Limited | Arts & recreation | 2000 |