| Prime Door Components Ltd | Professional & scientific | 2026 |
| Property 888 Ltd | Real estate | 2025 |
| Propino Pizza Co. Ltd | Hospitality | 2023 |
| PSM Health Care Services Ltd | Health & social care | 2022 |
| PTA Management Ltd | Professional & scientific | 2018 |
| Puraponds Ltd | Wholesale & retail | 2018 |
| Pure Compliance Limited | Professional & scientific | 2017 |
| Purple Fitness Limited | Arts & recreation | 2020 |
| PVS Security Ltd | Administrative & support | 2014 |
| Quayside IP Limited | Professional & scientific | 2022 |
| Quilterrozier Ltd | Hospitality | 2022 |
| R&A Flooring (South East) Ltd | Construction | 2026 |
| R&D Inc. Ltd | Hospitality | 2025 |
| R. and D. Schofield Limited | Transport & logistics | 1977 |
| R.F.Whitworth & Co Limited | Agriculture & fishing | 1956 |
| Radiology Projects Limited | Information & communication | 2014 |
| Raspberry Swirl Ltd | Other services | 2013 |
| RDP Sports Consultancy Ltd | Professional & scientific | 2022 |
| Real Impact Advisory Limited | Financial services | 2025 |
| Red London Accessories Ltd | Wholesale & retail | 2012 |
| Releaf Wrapping & Co Ltd | Manufacturing | 2025 |
| Renauld Sunglasses Limited | Manufacturing | 2015 |
| Research Podcasts Ltd | Education | 2021 |
| Revamp Paving & Groundwork’S Limited | Construction | 2025 |
| Rgsm Ltd | Professional & scientific | 2021 |
| Rise and Shine Play Cafe Ltd | Hospitality | 2025 |
| Rising Standard Scaffolding Limited | Construction | 2024 |
| Riverside Court Maintenance Company Limited | Real estate | 1990 |
| Riverside Fish & Chips (Essex) Ltd | Hospitality | 2015 |
| RM & Co Consulting Limited | Professional & scientific | 2025 |
| ROB Levison Design Ltd | Professional & scientific | 2016 |
| Robert Fairley Limited | Agriculture & fishing | 1997 |
| Robertson Transport Ltd | Transport & logistics | 2022 |
| Rock Formations Limited | Extraterritorial | 2015 |
| Roger Lascelles (Maps) Ltd | Information & communication | 2005 |
| Roofing 17 Ltd | Extraterritorial | 2024 |
| Room Outdoors Ltd | Construction | 2026 |
| Rose Brothers LLP | | 2018 |
| Rose Builders (Properties) Limited | Construction | 2002 |
| Rose Builders Ltd | Construction | 1995 |
| Rose Construction Group Limited | Financial services | 2019 |
| Rose Group Limited | Financial services | 2002 |
| Rose Partnership Homes Limited | Extraterritorial | 2021 |
| Rosey Fitness Limited | Other services | 2023 |
| Ross Systems International Limited | Information & communication | 1989 |
| RS Safespark Ltd | Construction | 2026 |
| Ruby and Rudy Ltd | Wholesale & retail | 2015 |
| Russet Place (West Bergholt) Management Company Limited | Households | 2025 |
| Rutland Haulage Limited | Transport & logistics | 2005 |
| S & C Autocare Ltd | Wholesale & retail | 2025 |
| S & C Motor Services Ltd | Wholesale & retail | 2018 |
| S & M Publicans LLP | | 2018 |
| S & R Precision Engineering Limited | Manufacturing | 1999 |
| S6 Construction Ltd | Construction | 2024 |
| S6 Estates Ltd | Real estate | 2024 |
| Sabine Roemer Limited | Manufacturing | 2007 |
| Sabir Lewis C.I.C. | Professional & scientific | 2024 |
| Sail Packaging and Processing Limited | Administrative & support | 2021 |
| Sailforce Partnership Limited | Arts & recreation | 2001 |
| Salonhyve Limited | Wholesale & retail | 2025 |
| Sanders Electrical Limited | Construction | 2021 |
| Sandy Lane Music Limited | Information & communication | 1999 |
| Sauka Groundworks Limited | Administrative & support | 2021 |
| SCAFFOLD17 Ltd | Construction | 2019 |
| Scott M Ecommerce Ltd | Wholesale & retail | 2018 |
| Sculpture Services Ltd | Other services | 2022 |
| SD Groundscare Limited | Administrative & support | 2012 |
| Secret Workspace Limited | Real estate | 2024 |
| Sector Projects Plus Limited | Other services | 2024 |
| SG Group Holdings Ltd | Professional & scientific | 2009 |
| Sharp Metalworks Ltd | Manufacturing | 2023 |
| SHOP2SHOP.COM Ltd | Wholesale & retail | 2026 |
| Sian Elan Makeup Ltd | Other services | 2019 |
| SIB Properties Ltd | Real estate | 2023 |
| Sibre Ltd | Professional & scientific | 2026 |
| Silent Discretion Ltd | Administrative & support | 2020 |
| Simba Health Care and Training Services Ltd | Health & social care | 2021 |
| Simon's Bespoke Ltd | Manufacturing | 2020 |
| Simplee.Business Limited | Information & communication | 2024 |
| Site Supervise UK Ltd | Construction | 2025 |
| SJW Holdco Ltd | Financial services | 2025 |
| Slobber Chops Ltd | Manufacturing | 2023 |
| SLR International Ltd | Transport & logistics | 2002 |
| Small Business Services (Accounting) Ltd | Professional & scientific | 2014 |
| Soft Beverage Brokers Ltd | Wholesale & retail | 2026 |
| Softfloor Limited | Wholesale & retail | 2013 |
| Somerton House Holdings Limited | Other services | 2025 |
| Sonic Blue Management Ltd | Hospitality | 2026 |
| Sourced Products and Services Ltd | Wholesale & retail | 2025 |
| Southtay Limited | Real estate | 1985 |
| Sparling & Associates Limited | Information & communication | 2002 |
| Specialist Door Design Solutions Ltd | Professional & scientific | 2021 |
| Spires Interiors Construction Limited | Construction | 2022 |
| Spires Interiors Limited | Construction | 2018 |
| Splodge Limited | Extraterritorial | 1988 |
| Spooner Roofing Renovations Ltd | Construction | 2026 |
| Squonk Antiques and Conservation Ltd | Wholesale & retail | 2014 |
| SRS Mechanical Limited | Construction | 2019 |
| ST Edmundsbury Mews Management Company Limited | Real estate | 2004 |
| Sta-Lok Terminals Limited | Wholesale & retail | 1983 |