| ROC Newco 2 Limited | Construction | 2024 |
| ROC Pbsa Partners Limited | Construction | 2025 |
| Rock Anchor Ltd | Professional & scientific | 2015 |
| Rock of Salvation Ministry Ltd | Other services | 2018 |
| Rock Tours Group Ltd | Financial services | 2025 |
| Rockery Property Investments Ltd | Real estate | 2022 |
| Rockwired Ltd | Real estate | 2020 |
| Rocky's Choice Limited | Hospitality | 2019 |
| Rogers Sailing Ltd | Arts & recreation | 2011 |
| Rolt (Sidcup) Management Company Limited | Real estate | 1983 |
| ROM Food Services Ltd | Hospitality | 2026 |
| Roman Kristin Limited | Professional & scientific | 2015 |
| Romans Paving and Landscaping Ltd | Administrative & support | 2025 |
| Roofcontrol Ltd | Construction | 2014 |
| Rory Mcewen Limited | Arts & recreation | 1964 |
| Rosanne Esposito Dyslexia Services Limited | Education | 2016 |
| Rosedene Court Limited | Real estate | 1984 |
| Ross Davis Limited | Construction | 2022 |
| Rossmore (Sidcup) Management Company Limited | Households | 1991 |
| Route One Booking Limited | Other services | 2023 |
| Route One Plumbing Services Ltd | Construction | 2017 |
| Rowhill Investments Ltd | Other services | 2014 |
| RPP 1 Limited | Construction | 2025 |
| Rpverrillo Ltd | Professional & scientific | 2024 |
| RS Facilities Management Ltd | Construction | 2015 |
| RS Lettings Management Ltd | Real estate | 2022 |
| RS M&E Ltd | Construction | 2026 |
| RSG Decorators (Kent) Limited | Construction | 2017 |
| RSM Civil & Structural Consultant Ltd | Construction | 2026 |
| Rubik Hansom Holdings Limited | Financial services | 2023 |
| Ruchi Restaurant Limited | Hospitality | 1998 |
| Rudipharm (Australia) Ltd | Wholesale & retail | 2025 |
| Ruler Crewing Ltd | Other services | 2017 |
| Ruprai Group Limited | Financial services | 2021 |
| Russell John Tickner Ltd | Financial services | 2015 |
| Russell Park Bowls Consortium Limited | Arts & recreation | 1991 |
| Ruxley Place Management Ltd. | Real estate | 2003 |
| RYE Media Limited | Information & communication | 2010 |
| S & T P Limited | Real estate | 2026 |
| S Abram Limited | Administrative & support | 2011 |
| S E Hannabuss & SON Limited | Construction | 2003 |
| S Farmer Plumbing & Heating Limited | Construction | 2021 |
| S Gulati Limited | Health & social care | 2019 |
| S R Loft Conversions Limited | Construction | 2010 |
| S&B Contracting Limited | Professional & scientific | 2017 |
| S&J Fibre Services Limited | Information & communication | 2016 |
| S&R Transport (Kent) Limited | | 2012 |
| S. Sujeepan Ltd | Professional & scientific | 2015 |
| S.A. Electrical Services Limited | Construction | 2019 |
| S.J.C Building Services (Kent) Ltd | Construction | 2013 |
| S.K.A Roofing and Building Ltd | Construction | 2024 |
| S.S.J Solutions Ltd | Information & communication | 2025 |
| S2 Contracts Limited | Construction | 2011 |
| Saddles Riding Centre Ltd | Agriculture & fishing | 2017 |
| Sade Noren Estates Limited | Real estate | 2023 |
| Sadebim Properties Limited | Real estate | 2021 |
| Sadenome Investments Limited | Real estate | 2020 |
| Sadenome Van Rentals Limited | Administrative & support | 2022 |
| Sadie Gibbs Ltd | Arts & recreation | 2014 |
| Safe Path Solutions Limited | Administrative & support | 2022 |
| Safe Site Electrical Services Ltd | Construction | 2025 |
| Safe System (UK) Ltd | Administrative & support | 2013 |
| Sail and FLY Ltd | Administrative & support | 2025 |
| Saint DE LA Mare Limited | Arts & recreation | 2003 |
| Saistuti Ltd | Professional & scientific | 2015 |
| Saistuti Properties Ltd | Real estate | 2022 |
| Salbim Technologies Limited | Information & communication | 2021 |
| Salon Moda Limited | Other services | 2012 |
| SAM Hendricks Limited | Information & communication | 2013 |
| SAM Price Fruit and VEG Limited | Wholesale & retail | 2004 |
| Samtech MAC Limited | Hospitality | 2022 |
| Samtem Limited | Hospitality | 2022 |
| Sandstone Homes Limited | Real estate | 2015 |
| Sangallo Ltd | Construction | 1997 |
| Sanjay Gulati Ltd | Health & social care | 2010 |
| Sapphire Wholesale Ltd | Wholesale & retail | 2022 |
| SAR Services Limited | Information & communication | 2015 |
| Saracen Chauffeur Services London Ltd | Transport & logistics | 2019 |
| Sarang Pharma Limited | Administrative & support | 2004 |
| Sarmacon Ltd | Information & communication | 2008 |
| Saroxy Investments Limited | Real estate | 2025 |
| Saroxy Limited | Real estate | 2008 |
| Saroxy London Limited | Real estate | 2019 |
| Saroxy Management Solutions Limited | Professional & scientific | 2013 |
| Saruyama Bonsai Limited | Administrative & support | 2017 |
| Sasefied Limited | Information & communication | 2022 |
| Sassosotto Ltd | Wholesale & retail | 2024 |
| Satio Ltd | Real estate | 2019 |
| Savania Limited | Wholesale & retail | 2019 |
| Savannah Supported Living Limited | Health & social care | 2023 |
| Sazan & Company Ltd | Professional & scientific | 2013 |
| Scaff FIX LDN Limited | Construction | 2025 |
| Scaffolding and Solar Installation Limited | Construction | 2022 |
| Scaleops Limited | Information & communication | 2016 |
| Scdth Ltd | Real estate | 2023 |
| Scion Property Ventures Limited | Real estate | 2020 |
| Scitec Group AI Limited | Professional & scientific | 2021 |
| Scitec Investments Limited | Wholesale & retail | 2018 |
| SCL Investments Limited | Real estate | 2024 |
| Scochar Limited | Administrative & support | 2013 |