| Ruben Properties Ltd | Real estate | 2021 |
| Ruben Property Group Limited | Real estate | 2024 |
| Ruben Property Investments Limited | Real estate | 2018 |
| Rubin Contracting Limited | Professional & scientific | 2019 |
| Rubix Investments Ltd | Wholesale & retail | 2021 |
| Rubix Squared Ltd | Wholesale & retail | 2020 |
| Ruby Star Consultants Limited | Professional & scientific | 2011 |
| Rudveer Ltd | Information & communication | 2011 |
| Rufus Healthcare Ltd | Health & social care | 2014 |
| Rufus Productions Limited | Information & communication | 2014 |
| Rumsey Renovations Limited | Construction | 2005 |
| Running Cool Limited | Manufacturing | 2022 |
| Runway Operations LLP | | 2015 |
| Rural City Air Ltd | Agriculture & fishing | 2020 |
| Rusedski LLP | | 2010 |
| Russell Ainley Properties Limited | Real estate | 1961 |
| Rutvig Patel Holdings Ltd | Financial services | 2026 |
| Ruveo Consultancy Ltd | Administrative & support | 2022 |
| RV Consultancy Limited | Professional & scientific | 2012 |
| RV Renovations Ltd | Construction | 2025 |
| RVC Contractors Ltd | Construction | 2024 |
| RVN Hairmedica Limited | Other services | 2011 |
| RVS Information Security Limited | Information & communication | 2017 |
| RW Co 20 Limited | Other services | 2013 |
| RW Housewares Ltd | Administrative & support | 2017 |
| Ryan Bellamy Ltd | Administrative & support | 2018 |
| Ryan Estates Direct Ltd | Real estate | 2017 |
| Ryan General Building Work Limited | Construction | 2020 |
| Ryan James Executive Search Limited | Professional & scientific | 2024 |
| Ryanbray Limited | Professional & scientific | 2025 |
| Ryanmcdonaghstagescenery Ltd | Construction | 2025 |
| Ryanoak Limited | Professional & scientific | 2022 |
| RYB Services Limited | Administrative & support | 2013 |
| Rycky Tiling Ltd | Construction | 2020 |
| RYE Bay Consulting Limited | Professional & scientific | 2019 |
| Ryeview Limited | Real estate | 2020 |
| Ryves Family Office Limited | Administrative & support | 2018 |
| RZD Consulting Limited | Professional & scientific | 2010 |
| S & D Pharma Limited | Wholesale & retail | 1990 |
| S & M TV Ltd | Information & communication | 2020 |
| S & O Property Developments Limited | Construction | 2023 |
| S & P Portfolio Limited | Real estate | 2011 |
| S B Heating Solutions Limited | Construction | 2016 |
| S Godley Transport Limited | Transport & logistics | 2016 |
| S J Property Management Ltd | Real estate | 2014 |
| S M D NED Limited | Construction | 2019 |
| S M Medical Services Ltd | Health & social care | 2016 |
| S Mason Sales Consultancy Limited | Professional & scientific | 2016 |
| S Merali LLP | | 2016 |
| S Parekh Ltd | Real estate | 2021 |
| S Q Properties Limited | Real estate | 2004 |
| S S Shah Ltd | Real estate | 2014 |
| S Saba Ltd | Health & social care | 2019 |
| S&D Pharma Hold Limited | Extraterritorial | 2009 |
| S&K Enforcement Limited | Public administration | 2020 |
| S&S Software Solutions Ltd | Information & communication | 2018 |
| S. Felman (Holdings) Limited | Real estate | 1952 |
| S.Esteban Consulting Limited | Professional & scientific | 2015 |
| S.H.A. & SON Estates Limited | Real estate | 2019 |
| S.J. Dyer Limited | Construction | 2014 |
| S.Marmara Limited | Administrative & support | 2016 |
| S.Miller & Sons Limited | Real estate | 1947 |
| S3N Tech Solutions Ltd | Information & communication | 2022 |
| S3R Tech Solutions Limited | Information & communication | 2013 |
| S95 London Motors Limited | Wholesale & retail | 2023 |
| SA &FM Properties Ltd | Real estate | 2024 |
| SA Magna Holdings Limited | Administrative & support | 2021 |
| SAA Cloud Solutions Ltd | Information & communication | 2026 |
| Saadar Care Ltd | Health & social care | 2018 |
| Saanar Consulting Limited | Information & communication | 2009 |
| Saas Solutions Ltd | Information & communication | 2013 |
| Sabercat Ltd | Real estate | 2020 |
| Sabus Ltd | Professional & scientific | 2010 |
| Sach B2L Ltd | Real estate | 2025 |
| Sadani Property Limited | Real estate | 2025 |
| Sadyr Aleph Investment Ltd | Financial services | 2021 |
| SAE Property Holdings Ltd | Financial services | 2025 |
| Safe Accountants Limited | Professional & scientific | 2022 |
| Safe AS Properties Limited | Real estate | 2024 |
| Safestore Investments 2018 Limited | Financial services | 2018 |
| Safestore Limited | Real estate | 2005 |
| Safestore Property Investment UK 1 Limited | Real estate | 2024 |
| Safestore Property Investment UK 2 Limited | Real estate | 2024 |
| Safestore Property Investment UK 3 Limited | Real estate | 2024 |
| Safestore Property Investment UK 4 Limited | Real estate | 2024 |
| Safestore Property Investment UK 5 Limited | Real estate | 2024 |
| Safetynet Properties Ltd | Real estate | 2016 |
| Sagar & Sagar LLP | | 2026 |
| Sagari Limited | Information & communication | 2008 |
| Sage Consulting Limited | Extraterritorial | 2000 |
| Sage IT Europe Limited | Information & communication | 2014 |
| Sahana Energy Ltd | Professional & scientific | 2026 |
| Sahana Group Ltd | Professional & scientific | 2025 |
| Sakiebo Limited | Administrative & support | 2015 |
| Sakthi Ltd | Health & social care | 2019 |
| Sales Incorporated Limited | Professional & scientific | 2003 |
| SALESBOOSTER4U Limited | Information & communication | 2014 |
| SALESTUDIO7 Ltd | Wholesale & retail | 2020 |
| Salt and Pepper Estates Ltd | Real estate | 2020 |
| Salt Cave Halotherapy UK Ltd | Construction | 2018 |