| RWE Renewables Gym 3 Limited | Financial services | 2010 |
| RWE Renewables Gym 4 Limited | Financial services | 2010 |
| RWE Renewables Management UK Limited | Administrative & support | 2019 |
| RWE Renewables UK Blyth Limited | Professional & scientific | 1999 |
| RWE Renewables UK Dogger Bank South (East) Limited | Construction | 2021 |
| RWE Renewables UK Dogger Bank South (West) Limited | Construction | 2021 |
| RWE Renewables UK Holdings Limited | Financial services | 2007 |
| RWE Renewables UK Humber Wind Limited | Energy | 2003 |
| RWE Renewables UK Limited | Financial services | 1999 |
| RWE Renewables UK London Array Limited | Energy | 2004 |
| RWE Renewables UK Onshore Wind Limited | Energy | 1999 |
| RWE Renewables UK Operations Limited | Energy | 1992 |
| RWE Renewables UK Robin Rigg East Limited | Energy | 1998 |
| RWE Renewables UK Robin Rigg West Limited | Energy | 2001 |
| RWE Renewables UK Scroby Sands Limited | Energy | 2000 |
| RWE Renewables UK Solar and Storage Limited | Financial services | 2022 |
| RWE Renewables UK Solar Holdings Limited | Financial services | 2023 |
| RWE Renewables UK Spareco Limited | Extraterritorial | 2014 |
| RWE Renewables UK Swindon Limited | Energy | 1990 |
| RWE Renewables UK Wind Services Limited | Professional & scientific | 2004 |
| RWE Renewables UK Zone SIX Limited | Professional & scientific | 2009 |
| RWE Technology UK Limited | Construction | 2009 |
| RWK Building Services Ltd | Construction | 2007 |
| RWS Energy Limited | Construction | 2007 |
| Ryan & Aaron Real Estates Limited | Real estate | 2024 |
| Ryan Brown Consultancy Limited | Information & communication | 2019 |
| Ryan Stuart Building Limited | Construction | 2017 |
| Ryano Plant Ltd | Administrative & support | 2018 |
| RYC Property Ltd | Real estate | 2022 |
| Rydan Aero Limited | Wholesale & retail | 2017 |
| Ryras Transport Ltd | Transport & logistics | 2018 |
| Ryve Developments Limited | Construction | 2009 |
| S & C R Limited | Transport & logistics | 1978 |
| S & H Enterprise Limited | Transport & logistics | 2023 |
| S & J Smith Building & Carpentry Contractors Limited | Construction | 2017 |
| S & N Building Services Ltd | Construction | 2007 |
| S & R Motors (Greenbridge) Limited | Wholesale & retail | 2012 |
| S & R Motors (Stratton) Limited | Wholesale & retail | 2012 |
| S & S Globetrotter Ltd | Households | 2021 |
| S & S Griggs Limited | Water & waste | 2010 |
| S & S Innovative Ltd | Administrative & support | 2012 |
| S & S Sporting Clays Limited | Arts & recreation | 2020 |
| S & W Cleaning Contractors Limited | Administrative & support | 2022 |
| S and J Cleaning Service Limited | Administrative & support | 2025 |
| S and R Actuarial and IT Services Ltd | Financial services | 2022 |
| S Burnett Tree Surgery & Forestry Contractors Ltd | Agriculture & fishing | 2018 |
| S Delaney Property Investments Ltd | Real estate | 2026 |
| S E Accountancy Ltd | Professional & scientific | 2013 |
| S E Accounting Ltd | Professional & scientific | 2009 |
| S E Courier Services Ltd | Transport & logistics | 2022 |
| S E Finance Ltd | Professional & scientific | 2010 |
| S G Electrical Services Wessex Limited | Construction | 2013 |
| S G S Plant Hire Limited | Construction | 2008 |
| S G T Contract Services Limited | Construction | 2025 |
| S H Forestry & Fencing Limited | Agriculture & fishing | 2002 |
| S H Nicol Holdings Ltd | Financial services | 2024 |
| S J Denton Carpentry and Building Services Limited | Construction | 2016 |
| S J Hogg Ltd | Construction | 2013 |
| S J S Professional Services Limited | Real estate | 2017 |
| S L Newman Grab Hire Ltd | Other services | 2016 |
| S M E Carpentry Limited | Extraterritorial | 2023 |
| S M Gilbert Limited | Construction | 2008 |
| S N E Fernandes Ltd | Real estate | 2025 |
| S N M C Ltd | Professional & scientific | 2013 |
| S P Sporting Limited | Arts & recreation | 2011 |
| S Project Ltd | Wholesale & retail | 2026 |
| S Robbins Plumbing & Heating Ltd | Construction | 2006 |
| S S & L Limited | Real estate | 2017 |
| S W Group Logistics Limited | Transport & logistics | 1979 |
| S&D New Chapter Ltd | Real estate | 2025 |
| S&J Fast Food Swindon Ltd | Hospitality | 2024 |
| S&Jpreloved& Vintage Clothing Ltd | Wholesale & retail | 2026 |
| S&K Petro Ltd | Wholesale & retail | 2019 |
| S&N Training and Services Limited | Education | 2026 |
| S&N888 Limited | Households | 2023 |
| S&S Accountancy Services Ltd | Professional & scientific | 2022 |
| S&S Pubs Ltd | Hospitality | 2026 |
| S&S Serafim Services Ltd | Transport & logistics | 2021 |
| S-Drive Motorcycles Limited | Wholesale & retail | 2023 |
| S-Rock Care Services Ltd | Health & social care | 2023 |
| S-Rock Recruitment Ltd | Administrative & support | 2022 |
| S. C. Hornby Ltd | Real estate | 2021 |
| S. D. Knee Limited | Professional & scientific | 2005 |
| S. Laszlo Plant Hire Ltd | Administrative & support | 2025 |
| S.A Infotech Limited | Information & communication | 2011 |
| S.A.D. Accountants Limited | Professional & scientific | 2010 |
| S.D.K. Educational Consultancy Limited | Professional & scientific | 2005 |
| S.Edwards Amusements Ltd | Arts & recreation | 2022 |
| S.J. Harris Family Investments Ltd | Financial services | 2023 |
| S.J. Harris Services Cirencester Limited | Construction | 2013 |
| S.J.C.Contracting 2018 Limited | Construction | 2018 |
| S.Monteiro Contruction Ltd | Construction | 2026 |
| S.W. Commodities Limited | Transport & logistics | 1995 |
| S0SSECURITY24 Ltd | Administrative & support | 2024 |
| S2NAUTOCARE Ltd | Wholesale & retail | 2025 |
| S33KERS Limited | Professional & scientific | 2018 |
| S4S Engineering Limited | Professional & scientific | 2025 |
| SA Mortgage Solutions Ltd | Financial services | 2020 |
| SA Spaza Supplies UK Limited | Wholesale & retail | 2024 |
| Saare Botanics Limited | Wholesale & retail | 2026 |