| Rachel Pedder-Smith Designs Limited | Wholesale & retail | 2018 |
| Ravenbourne Developments Limited | Construction | 1994 |
| Ravenbourne Group Holdings Limited | Financial services | 2026 |
| Ravenbourne Group Limited | Construction | 2009 |
| Ravenbourne Investments Limited | Financial services | 2017 |
| Ravenbourne Securities Limited | Construction | 1994 |
| RBC Construction Limited | Construction | 2003 |
| Redwald Partners Ltd | Health & social care | 2026 |
| Regional Roofing Ltd | Construction | 2020 |
| Reli Properties Ltd | Real estate | 2025 |
| Relik Ltd | Financial services | 2023 |
| Renaissance Horticulture Limited | Administrative & support | 2019 |
| Rented (Norwich) Ltd | Real estate | 2017 |
| Rentmoore Vehicles Limited | Extraterritorial | 1985 |
| Ridba Ltd | Other services | 2015 |
| Ripple Public Relations Ltd | Professional & scientific | 2011 |
| Riverbeck Financial Services Consulting Limited | Professional & scientific | 2020 |
| Riverbeck Management Limited | Real estate | 1999 |
| RNA Properties Limited | Construction | 2007 |
| Roger Skinner Holdings Limited | Financial services | 2018 |
| Roger Skinner Limited | Manufacturing | 1976 |
| ROK Solutions Ltd | Professional & scientific | 2024 |
| Rokkaku Limited | Professional & scientific | 2021 |
| Royce Investments Limited | Real estate | 2018 |
| S Smith Brickwork Ltd | Construction | 2020 |
| S&L Consultants Ltd | Professional & scientific | 2014 |
| S.P.A.C.E. (Education) Ltd | Education | 2024 |
| Safer Activities for Everyone CIC | Education | 2011 |
| Sales Elevate 360 Ltd | Professional & scientific | 2023 |
| Salpen Holdings Limited | Financial services | 2020 |
| Salpen Limited | Real estate | 2020 |
| Sancroft Agricultural Services Ltd | Agriculture & fishing | 2002 |
| Sansea Ltd | Wholesale & retail | 2025 |
| SAY Southwold Properties Ltd | Real estate | 2021 |
| Sblc Ltd | Construction | 2019 |
| Scarlet INK Productions Limited | Arts & recreation | 2019 |
| Scott J Regan Chimney Sweeping Ltd | Administrative & support | 2023 |
| Scott J Regan Window Cleaning Services Ltd | Administrative & support | 2018 |
| Scott Moore Limited | Information & communication | 1998 |
| Seamless CRM Limited | Information & communication | 2014 |
| Seatly Limited | Wholesale & retail | 2025 |
| Seensocial Ltd | Administrative & support | 2016 |
| Selmani Construction Ltd | Construction | 2021 |
| Selvine Limited | Real estate | 2025 |
| Serenity Cottages Ltd | Real estate | 2020 |
| Serious-It Ltd | Information & communication | 2009 |
| SET in Hand Limited | Transport & logistics | 2020 |
| SF Care Limited | Health & social care | 2015 |
| Simmons Builders Limited | Construction | 2002 |
| SJ Electeical & Automation Ltd | Construction | 2026 |
| Skinner’S Pet Food Holdings Limited | Financial services | 2020 |
| SM Direct Ltd | Transport & logistics | 2014 |
| Smart Contract Services Limited | Administrative & support | 1996 |
| Snugglebug Homes Ltd | Real estate | 2024 |
| Social Work Projects UK Limited | Health & social care | 2010 |
| Society for Academic Primary Care Ltd | Administrative & support | 2024 |
| South Norfolk Surfacing Limited | Construction | 2024 |
| Spreadwise East Anglia Ltd | Administrative & support | 2012 |
| Springs Dance Company | Education | 2007 |
| SPS Civils & Utilities Ltd | Construction | 2021 |
| Spurling & Remblance Limited | Wholesale & retail | 2013 |
| ST Gallen Consulting Limited | Information & communication | 2021 |
| ST Mary's Close (Wilby) Management Company Limited | Households | 1999 |
| Stampe Prints Limited | Wholesale & retail | 2025 |
| Stargrace Limited | Arts & recreation | 2000 |
| Starke Industries Limited | Wholesale & retail | 2016 |
| Starsacre Ltd | Agriculture & fishing | 2024 |
| Steve Sach Barns Limited | Hospitality | 2007 |
| Stockwin Associates Ltd | Professional & scientific | 2023 |
| Stradbroke IVY House Ltd | Hospitality | 2023 |
| Stradbroke Media C.I.C. | Information & communication | 2014 |
| Straight Outta Greece Limited | Wholesale & retail | 2020 |
| Street First AID Ltd | Education | 2025 |
| Strube UK Limited | Wholesale & retail | 2012 |
| Studio 37 Interior & Exterior Architecture Ltd | Wholesale & retail | 2024 |
| Suffolk Shepherds Huts Ltd | Hospitality | 2022 |
| Suffolk Skies Ltd | Manufacturing | 2011 |
| Suffolk Timber Frame Buildings Limited | Construction | 2006 |
| Suffolk Truck Sales Ltd | Wholesale & retail | 2018 |
| Sumeru Ltd | Information & communication | 2002 |
| Support That Works Limited | Administrative & support | 2025 |
| Surface Solutions East Anglia Ltd | Construction | 2009 |
| Susan Whymark Funeral Service Ltd | Other services | 2003 |
| Sycamore Farm Ltd | Agriculture & fishing | 2024 |
| Synergy Operations Ltd | Professional & scientific | 2025 |
| T J & D Project Management Limited | Construction | 2018 |
| T.J. Barrett & SON (Property) Limited | Real estate | 2001 |
| T800 Limited | Arts & recreation | 2013 |
| Tasp Marketing Limited | Professional & scientific | 2021 |
| Terry Associates Consultants Limited | Professional & scientific | 2012 |
| Thanos Renewables Ltd | Professional & scientific | 2025 |
| THE British Blind and Shutter Association | Other services | 1991 |
| THE Builders Arms Ltd | Construction | 2019 |
| THE Cogwheel Trust (International) Limited | Other services | 2003 |
| THE Day After Friday Ltd | Professional & scientific | 2020 |
| THE EYE Rettery Company Limited | Real estate | 2023 |
| THE Fitness Hub Suffolk Ltd | Health & social care | 2024 |
| THE Hayes Collective Ltd | Professional & scientific | 2025 |
| THE Laurel Partnership Ltd | Professional & scientific | 2012 |
| THE Laurels (Fressingfield) Limited | Households | 2007 |