| Rtb-Ff Ltd | Arts & recreation | 2024 |
| Rubato MX Ltd | Information & communication | 2020 |
| Rubberduck Art and Design Ltd | Education | 2007 |
| Rubec Aerodynamics Ltd | Professional & scientific | 2026 |
| Rudderham Plumbing & Heating Ltd | Construction | 2018 |
| Rudkin Smiles Ltd | Real estate | 2024 |
| Rudra Technology Solutions Ltd | Information & communication | 2018 |
| Rudrakshagems Ltd | Wholesale & retail | 2012 |
| Rudranyi Ltd | Wholesale & retail | 2025 |
| Rugene Limited | Information & communication | 2023 |
| RUL Essex Limited | Other services | 2017 |
| RUL Homes Ltd | Real estate | 2019 |
| RUM CAP Limited | Professional & scientific | 2024 |
| Rumi Herbal Tea Ltd | Wholesale & retail | 2018 |
| Rumour Hair Limited | Other services | 2010 |
| Runningwell Equestrian Centre Limited | Arts & recreation | 2003 |
| Runningwell Liveries Limited | Other services | 2018 |
| Runwalk Services Limited | Professional & scientific | 2023 |
| Runwell Construction Co Limited | Extraterritorial | 1970 |
| Runwell Investments Ltd | Financial services | 2025 |
| Rushbury Carpentry & Building Ltd | Construction | 2025 |
| Rushtons the Chef's Greengrocers Limited | Hospitality | 2012 |
| Russ and Tiara Ltd | Health & social care | 2018 |
| Russel James Limited | Professional & scientific | 2002 |
| Russell Bennett Limited | Administrative & support | 2009 |
| Russell Doughty Project Management Ltd | Professional & scientific | 2017 |
| Russell Stevens Joinery Limited | Manufacturing | 2021 |
| Rustic Oak Limited | Manufacturing | 2012 |
| Ruthin International Arts CIC | Education | 2025 |
| Ruthless Barbershop Ltd | Other services | 2025 |
| RV Beauty Hub Limited | Other services | 2026 |
| RV Beauty Limited | Other services | 2024 |
| RVM Property Limited | Real estate | 2021 |
| RW76 Ltd | Information & communication | 2014 |
| RWB Chiller Services Ltd | Construction | 2019 |
| Rwlocks Ltd | Other services | 2025 |
| RWP Plumbing & Heating Ltd | Construction | 2025 |
| RWS Networks Limited | Information & communication | 2011 |
| Ryan & Aart Land & Commercial Ltd | Construction | 2018 |
| Ryan Capital Partners Limited | Professional & scientific | 2016 |
| Ryan Portfolio Limited | Real estate | 2021 |
| Ryan Valeting & Detailing Ltd | Wholesale & retail | 2025 |
| Ryecroft Freight Ltd | Transport & logistics | 2000 |
| Ryvere Homes Limited | Health & social care | 2021 |
| Ryvere Ltd | Real estate | 2025 |
| Ryxx Ltd | Wholesale & retail | 2024 |
| S & D Building and Groundworks Ltd | Construction | 2023 |
| S & DEE Solutions Ltd | Professional & scientific | 2013 |
| S & F Global Property Investment Limited | Real estate | 2020 |
| S & JC Ltd | Professional & scientific | 2011 |
| S & W Croft LLP | | 2025 |
| S a Phelps Ltd. | Wholesale & retail | 2016 |
| S Clements Utilities Limited | Energy | 2018 |
| S Doughty Site Surveying Limited | Professional & scientific | 2017 |
| S I K PVT Ltd | Wholesale & retail | 2022 |
| S J Aesthetics Ltd | Professional & scientific | 2013 |
| S J Consultancy Limited | Construction | 2003 |
| S J Harris Electrical Ltd | Other services | 2009 |
| S J Marshall Limited | Administrative & support | 2013 |
| S Joy S Film Ltd | Information & communication | 2025 |
| S Krishnappa Limited | Health & social care | 2009 |
| S L C Consultants Ltd. | Administrative & support | 2001 |
| S L Innocent Engineering Limited | Real estate | 2014 |
| S M Wisbey Limited | Professional & scientific | 2016 |
| S P Bardwell Holdings Limited | Construction | 2016 |
| S P Building Ltd | Construction | 2015 |
| S R Carpentry & Property Services Ltd | Construction | 2022 |
| S R Properties (Chelmsford) Limited | Real estate | 2005 |
| S R Saville Limited | Construction | 2004 |
| S Sinclair Properties Limited | Real estate | 1981 |
| S T Ware and Co. Limited | Financial services | 2025 |
| S W Home Improvements Limited | Construction | 2015 |
| S W KIM Limited | Hospitality | 2004 |
| S&G Distribution Limited | Wholesale & retail | 2017 |
| S&J Agriculture LLP | | 2025 |
| S&J Maintenace Ltd | Construction | 2025 |
| S&M Food and Wine Ltd | Wholesale & retail | 2025 |
| S&S Chelmsford Coffee Ltd | Hospitality | 2019 |
| S&S Resilience Data Limited | Information & communication | 2023 |
| S&Sadvisors Ltd | Professional & scientific | 2025 |
| S&T Bean Properties Ltd | Real estate | 2014 |
| S&T Medical Consultancy PVT Ltd | Health & social care | 2025 |
| S&T Property Services PVT Ltd | Real estate | 2024 |
| S-Type Security and Solutions Limited | Administrative & support | 2017 |
| S-Type Training Academy Ltd | Education | 2026 |
| S. G. Sweeting Limited | Administrative & support | 1997 |
| S. P. Bardwell Limited | Construction | 1982 |
| S. Thorogood & Sons (Covent Garden) Limited | Wholesale & retail | 1988 |
| S. Thorogood & Sons (Direct) Ltd | Wholesale & retail | 2024 |
| S.A. Mynard (Trading) Limited | Wholesale & retail | 1998 |
| S.A.Mynard Limited | Real estate | 1947 |
| S.A.S Supplies Limited | Wholesale & retail | 2020 |
| S.B. Youngs and SON (Builders) Limited | Real estate | 1951 |
| S.I.H. Curtains Limited | Wholesale & retail | 1994 |
| S.J. Bedwell & Sons (Printers) Limited | Manufacturing | 1938 |
| S.J.M. a & M (Holdings) Limited | Wholesale & retail | 2023 |
| S.J.M. Alloys & Metals Limited | Wholesale & retail | 1993 |
| S.N.F Heating Services Ltd | Construction | 2026 |
| S.O.G Essex Limited | Professional & scientific | 2024 |
| S.P.Y. Tech Services Limited | Manufacturing | 2004 |