| Quintin Associates Ltd | Professional & scientific | 2007 |
| R J Dibble Groundworks Ltd | Construction | 2022 |
| R J Gooding Plant Hire & Groundworks Limited | Construction | 2007 |
| R Z Energy Limited | Energy | 2013 |
| R Z Farm Energy Limited | Professional & scientific | 2014 |
| R.O. Project Engineering Ltd | Administrative & support | 2016 |
| Racket Design Ltd | Arts & recreation | 2025 |
| Randex-Vigilant Security SW Ltd | Transport & logistics | 2003 |
| Rattle & HUM Reptiles Ltd | Wholesale & retail | 2026 |
| Really Boring Storage Limited | Transport & logistics | 2025 |
| Recannect Limited | Agriculture & fishing | 2026 |
| Red Lion (Somerton) Limited | Households | 2004 |
| Regal Way Flats Ltd | Households | 2024 |
| Reignite Learning Ltd | Education | 2026 |
| Reprohub Ltd | Manufacturing | 2024 |
| Restorics Ltd | Manufacturing | 2023 |
| Rhys's Roofing Limited | Construction | 2025 |
| Rigger.Co.Uk Limited | Other services | 2007 |
| RO Drivers Ltd | Financial services | 2010 |
| Robb Owen Digital Ltd | Information & communication | 2018 |
| Robert Marshall Properties Limited | Real estate | 2009 |
| Robert Rice Contractors Limited | Manufacturing | 2008 |
| Roberti Fine Art Limited | Wholesale & retail | 2024 |
| Robo Taxi CAB Ltd | Transport & logistics | 2026 |
| Robo Taxi Cyber CAB Ltd | Transport & logistics | 2026 |
| Robocab Depo Ltd | Transport & logistics | 2026 |
| Robocab Hub Ltd | Transport & logistics | 2026 |
| Robocab Taxi Ltd | Transport & logistics | 2026 |
| Ronin Ventures Ltd | Information & communication | 2009 |
| Rose Cottage Renovations Limited | Construction | 2002 |
| Rosehip Herbal Clinic Ltd | Health & social care | 2026 |
| Ruddle Group Limited | Real estate | 1975 |
| Runner Duck Pet & Poultry Supplies Ltd | Wholesale & retail | 2014 |
| Russell Farley Services Limited | Construction | 2006 |
| Ryan Smart Automotive Ltd | Wholesale & retail | 2025 |
| S & a Hire Limited | Administrative & support | 2024 |
| S & P Building Limited | Construction | 2024 |
| S a Pledger Limited | Construction | 2000 |
| S Morris Limited | Manufacturing | 1963 |
| S Pledger Builders Ltd | Construction | 2017 |
| S2G Ltd | Construction | 2020 |
| Santana Foods Station Ltd | Hospitality | 2024 |
| Sarah Cooking Limited | Professional & scientific | 2017 |
| Sceptre Networking Limited | Information & communication | 1996 |
| Schinkis Oak Structures Ltd | Construction | 2013 |
| Scoop Wholefoods UK Limited | Wholesale & retail | 2018 |
| Sea Hives Ltd | Professional & scientific | 2011 |
| Sedgemoor Telecom Limited | Construction | 2005 |
| Seifert Alpha Propertys Ltd | Real estate | 2025 |
| Sheepskin Rugs Ltd | Wholesale & retail | 2026 |
| Sheldon Reed Limited | Professional & scientific | 1997 |
| Shen Properties Limited | Real estate | 2020 |
| Shepherd Construction and Engineering Ltd | Construction | 2025 |
| SHP Construction Ltd | Construction | 2015 |
| Sinders Cleaning Services Ltd | Extraterritorial | 2020 |
| Sista Ltd | Arts & recreation | 2025 |
| Skyline Events Ltd | Arts & recreation | 2001 |
| Skyline Promotions Ltd. | Arts & recreation | 1996 |
| Skyline Tour Operations Ltd | Administrative & support | 2009 |
| Slice Stable Holdco Limited | Financial services | 2025 |
| Sloggetts Limited | Professional & scientific | 2020 |
| Smoulder & Scorch Ltd | Hospitality | 2018 |
| Snowdrop Construction Limited | Wholesale & retail | 2000 |
| Soaring Ltd | Real estate | 2020 |
| Software Designs (Southern) Limited | Professional & scientific | 1989 |
| Solace Property Holdings Ltd | Real estate | 2017 |
| Somerset Accountancy Administration Ltd | Financial services | 2025 |
| Somerset Accountancy Services Ltd | Professional & scientific | 2002 |
| Somerset Accountancy Trustees Ltd | Financial services | 2025 |
| Somerset Accountancy Wills Ltd | Professional & scientific | 2025 |
| Somerset Arts Therapies Centre CIC | Health & social care | 2023 |
| Somerset Autos Ltd | Wholesale & retail | 2024 |
| Somerset Aviation Fire Solutions Ltd | Public administration | 2021 |
| Somerset Doctors Ltd | Health & social care | 2022 |
| Somerset Membrillo Limited | Manufacturing | 2017 |
| Somerset Technologies Limited | Professional & scientific | 2017 |
| Somerton Campers Limited | Wholesale & retail | 2018 |
| Somerton Joinery Limited | Manufacturing | 1991 |
| Somerton Motor Company Limited | Wholesale & retail | 2003 |
| Somerton PUB Co Limited | Hospitality | 2018 |
| Somerton Sports Club Limited | Real estate | 2017 |
| Somerview Limited | Real estate | 2021 |
| Southwestaviation Ltd | Other services | 2019 |
| Southwood Lane Flats Limited | Households | 1960 |
| Sparrow and Plumb Ltd | Manufacturing | 2021 |
| Specialist Wound Care Limited | Health & social care | 2019 |
| Spencer & Richman Ltd | Construction | 2002 |
| Spine Space Ltd | Health & social care | 2025 |
| Spinone Dreams Limited | Manufacturing | 2019 |
| SPR Ltd | Financial services | 2012 |
| SPR Redfire Ltd | Real estate | 2022 |
| SPR Redfire Rooms Ltd | Hospitality | 2022 |
| SPR Robocab Ltd | Financial services | 2026 |
| ST Cleers Chapel | Other services | 2016 |
| Stable Payment Solutions Limited | Financial services | 2025 |
| Stanley's Property Ltd | Real estate | 2025 |
| Station Close Management Company Limited | Households | 2017 |
| Stayinphase Limited | Manufacturing | 2010 |
| Steelbeams.Online Ltd | Wholesale & retail | 2021 |
| Steeltherm Chimney Systems Limited | Administrative & support | 1997 |