| Really Cool KIT Ltd. | Information & communication | 2011 |
| Realseal Home Improvements Ltd | Construction | 2009 |
| Realseal Ltd | Construction | 2022 |
| Rectory Lane Design Limited | Administrative & support | 2005 |
| Rectory Lane Landholdings Ltd | Administrative & support | 2020 |
| Red River Investment Group Ltd | Real estate | 2024 |
| Redpower Limited | Administrative & support | 2001 |
| Reflections Counselling and Reiki Limited | Health & social care | 2025 |
| Reflections Landscaping Limited | Administrative & support | 2004 |
| REN Developments Ltd | Real estate | 2021 |
| Rennie Taylor Limited | Real estate | 2019 |
| Rent a House Limited | Real estate | 2018 |
| Residents Management (NO. 44) Limited | Households | 1985 |
| Respire Regenerate Ltd | Other services | 2024 |
| Resto Build Ltd | Construction | 2025 |
| Revel Bikes UK Ltd | Wholesale & retail | 2026 |
| Revival Property Company Ltd | Real estate | 2025 |
| Rhian Hamer Consultancy Ltd | Administrative & support | 2016 |
| Rhian Price Media Limited | Professional & scientific | 2024 |
| Rholben Radiology Limited | Health & social care | 2013 |
| Richmond Accountancy Services Limited | Professional & scientific | 2015 |
| Ride RSS Ltd | Other services | 2022 |
| Right to the Point Limited | Professional & scientific | 2018 |
| Riverstone Meadow Ltd | Arts & recreation | 2025 |
| RJ Process Engineering Ltd | Manufacturing | 2015 |
| RLN Entertainment Ltd | Hospitality | 2024 |
| Road 2 Rail Access Limited | Construction | 2018 |
| ROB Yorke (Associates) Limited | Other services | 2008 |
| Robert Kilgour Architects Limited | Professional & scientific | 2009 |
| Robert Price (Builders Merchants) Limited | Wholesale & retail | 1975 |
| Robert Price (Builders' Bitz) Limited | Wholesale & retail | 2003 |
| Robert Price (Timber Merchants) Limited | Wholesale & retail | 1953 |
| Robert Price Building Supplies Limited | Extraterritorial | 1988 |
| Roberts Florists Limited | Wholesale & retail | 2005 |
| Robertson Medical Limited | Health & social care | 2010 |
| Robin Wood Associates Limited | Extraterritorial | 2016 |
| Robinson Rural Solutions Limited | Administrative & support | 2026 |
| Roja Project Services Ltd | Information & communication | 2023 |
| Room Service Developments Limited | Construction | 2015 |
| Rosiflood Ltd | Arts & recreation | 2014 |
| Rother House Finance Limited | Financial services | 1978 |
| RRB Estates Ltd | Hospitality | 2024 |
| RS UK Properties Ltd | Real estate | 2025 |
| Rualox Limited | Health & social care | 2021 |
| Rudd & SON LLP | | 2017 |
| Rudd Farms Limited | Manufacturing | 2015 |
| RV Publishing Limited | Information & communication | 2019 |
| RWH Constructability Limited | Construction | 2011 |
| S & C Grainger Limited | Wholesale & retail | 2014 |
| S & G Property Associates Ltd | Construction | 2018 |
| S & V Studio Ltd | Professional & scientific | 2021 |
| S J Davies & Partners Limited | Construction | 2014 |
| S J G Dyer Limited | Manufacturing | 2008 |
| S Morgan Building & Landscaping Ltd | Construction | 2024 |
| S&S Bowe Ltd | Financial services | 2019 |
| S. J. M. Property Services Limited | Administrative & support | 2015 |
| Saco Consultancy Limited | Construction | 2018 |
| Saeth Consulting Ltd | Professional & scientific | 2025 |
| Safe and Sound (Telecom) Limited | | 1987 |
| Safe Approach Training Ltd | Education | 2022 |
| Salient Security Ltd | Administrative & support | 2015 |
| SAM Jones Coaching Ltd | Education | 2017 |
| Same Same BUT Different Limited | Hospitality | 2008 |
| Sangathy.Com Limited | Information & communication | 2026 |
| Sara Duane Laser and Skin Ltd | Other services | 2026 |
| Sara Duane Permanent Cosmetics Ltd | Other services | 2025 |
| Sara Duane Training and Education Ltd | Education | 2025 |
| Sarrapr Ltd | Professional & scientific | 2019 |
| Saxonbury Management Company Limited | Households | 2013 |
| SC Hospitality Group Ltd | Hospitality | 2018 |
| Scape Ceramics Limited | Manufacturing | 2026 |
| Sea Lily Plus Limited | Real estate | 2022 |
| Sea Lily Properties Ltd | Real estate | 2018 |
| Secondself Services Limited | Information & communication | 2017 |
| Seikor Ltd | Financial services | 2021 |
| Select Nutrition Services Ltd | Agriculture & fishing | 2005 |
| Senator Investments Limited | Real estate | 2018 |
| Seren Care Limited | Health & social care | 2019 |
| Serentaro Ltd | Information & communication | 2014 |
| SES Catering Limited | Hospitality | 2010 |
| Seven Club Limited | Other services | 1999 |
| Seymour Mortgage Solutions Ltd | Other services | 2015 |
| SF Bookkeeping Services Ltd | Professional & scientific | 2022 |
| Sharp Scissors Ltd | Other services | 2026 |
| Shepherd Resourcing Limited | Administrative & support | 2024 |
| Shepherd Technical Services Group Ltd | Professional & scientific | 2026 |
| Siam Health Massage Ltd | Health & social care | 2017 |
| Silver Ball PR Limited | Professional & scientific | 2013 |
| Simon Monnington Ltd | Professional & scientific | 2025 |
| Simply Accountancy Ltd | Professional & scientific | 2011 |
| Singh Cash and Carry Limited | Wholesale & retail | 2013 |
| Singh Inventure Ltd | Wholesale & retail | 2021 |
| Sion Jones Builders Limited | Construction | 2003 |
| SIX Bells Development Limited | Real estate | 2020 |
| Sjcollins Ltd | Professional & scientific | 2012 |
| Skeenie Holdings Ltd | Financial services | 2022 |
| Skenfrith Flood Group Ltd | Administrative & support | 2026 |
| Sket Ltd | Hospitality | 2012 |
| Sketch Studio Architects Ltd | Professional & scientific | 2020 |
| Skinthetics Studio Ltd | Other services | 2023 |