| Nishikan Ltd | Arts & recreation | 2003 |
| Nmjaero Ltd | Manufacturing | 2023 |
| NNG A&N Ltd | Wholesale & retail | 2007 |
| NO Naked Windows Ltd | Manufacturing | 2020 |
| NPT Engineering & Environmental Ltd | Professional & scientific | 2020 |
| Odgers Conservation Consultants Limited | Professional & scientific | 2005 |
| Ortica Limited | Professional & scientific | 2024 |
| Ortica Restaurants Ltd | Hospitality | 2026 |
| Osborne Tree Services Ltd | Agriculture & fishing | 2022 |
| Osmond Solutions Limited | Information & communication | 2017 |
| P C & Network Support Services Limited | Wholesale & retail | 2003 |
| P J Ductwork Services Limited | Construction | 2005 |
| P.D.Q. Direct Despatch Limited | Transport & logistics | 1995 |
| Pakiri Poultry Services Ltd | Wholesale & retail | 2023 |
| Parker Stone Ltd | Professional & scientific | 2015 |
| Paula Carnell Ltd | Agriculture & fishing | 2020 |
| PDQ Storage Ltd | Transport & logistics | 2006 |
| PGH Consulting Limited | Public administration | 2012 |
| Phillips Tyres Castle Cary Limited | Wholesale & retail | 2008 |
| Pijam Limited | Real estate | 2011 |
| Pilates at Your Desk LLP | | 2018 |
| Ploverfield Investments Limited | Real estate | 1963 |
| Polkadot Group Ltd | Professional & scientific | 2017 |
| Power Source Recruitment Ltd Ltd | Construction | 2025 |
| Probity Care Ltd | Administrative & support | 2021 |
| Provender Somerset Ltd | Hospitality | 2025 |
| Pulmonarius Limited | Professional & scientific | 2018 |
| R H Snook & Partners LLP | | 2019 |
| R Meek Ltd | Education | 2016 |
| R T Foster Ltd | Transport & logistics | 2020 |
| R. O'Dell (Holdings) Limited | Agriculture & fishing | 1995 |
| RAY Ackerman Ltd | Construction | 2011 |
| Resolution Dynamics Limited | Professional & scientific | 1998 |
| Reverieluxe Ltd | Wholesale & retail | 2024 |
| RGF Ltd | Other services | 2015 |
| Riding LEA Estates Limited | Real estate | 2013 |
| Riley Futures Limited | Real estate | 2021 |
| RIO BOD Limited | Hospitality | 2026 |
| Riviera (Carbery) Management Company Ltd | Households | 2021 |
| ROB Trevis Limited | Construction | 2013 |
| Rocket Raffles Ltd | Wholesale & retail | 2025 |
| Rockshore Limited | Real estate | 2025 |
| Romanillos Guitars Limited | Manufacturing | 2009 |
| Room 2 Create Ltd | Information & communication | 2016 |
| ROOM4UK Ltd | Construction | 2023 |
| Rossiters (Castle Cary) Limited | Professional & scientific | 2012 |
| S & N Property South West Ltd | Real estate | 2013 |
| S W Building & Renovations Ltd | Construction | 2024 |
| S W Ollis Limited | Wholesale & retail | 2011 |
| Safety Airworthiness Engineering Limited | Professional & scientific | 2015 |
| Saffer Media Ltd | Information & communication | 2014 |
| Sampson Site Services Limited | Construction | 2013 |
| Samseo Limited | Administrative & support | 2016 |
| Saxon Mills Management Company Limited | Households | 2015 |
| SB Construction South West Ltd | Construction | 2014 |
| Schimmel Hardware Limited | Wholesale & retail | 2023 |
| SFB Butchery Ltd | Wholesale & retail | 2025 |
| Silentree Holdings Ltd | Real estate | 2017 |
| Silver Street Hire Ltd | Administrative & support | 2024 |
| Silver Street Loos Ltd | Administrative & support | 2024 |
| Simon Messenger Plumbing & Heating Ltd | Construction | 2013 |
| SJH Carpets Limited | Wholesale & retail | 2007 |
| Slic Consultancy Ltd | Professional & scientific | 2023 |
| SM Composites Ltd | Manufacturing | 2019 |
| Somerset Consultancy Ltd | Professional & scientific | 2025 |
| Somerset Spirit Company Ltd | Manufacturing | 2019 |
| Somerset Stone Supplies Limited | Mining & quarrying | 2019 |
| Somerton Windows Ltd | Construction | 2003 |
| South West Karting (Haynes) Ltd | Arts & recreation | 2015 |
| South West Window Sampling Ltd | Construction | 2020 |
| Sparrows (Somerset) Ltd | Manufacturing | 2012 |
| Spicy Affair Ltd | Wholesale & retail | 2019 |
| Steve Parker Services Ltd | Water & waste | 2019 |
| Stung Limited | Administrative & support | 1999 |
| Surface Saver Ltd | Other services | 2017 |
| Suzi & Chris Limited | Health & social care | 2024 |
| Svecc Limited | Professional & scientific | 2023 |
| Sweeney-Carter Limited | Professional & scientific | 2025 |
| T&K Fuels Limited | Wholesale & retail | 2025 |
| TEC Building and Timber Ltd | Construction | 2017 |
| Temple Court Investments (London) Limited | Professional & scientific | 1963 |
| Tfocus Developments Ltd | Construction | 2024 |
| THE Burnt Chef Project CIC | Health & social care | 2020 |
| THE Cuffe Partnership LLP | | 2020 |
| THE Fit Mind Performance Ltd | Education | 2026 |
| THE George Hotel at Castle Cary Ltd | Hospitality | 2006 |
| THE Medicinal Tea Company Limited | Manufacturing | 2023 |
| THE Olive Tree Wells Ltd | Hospitality | 2022 |
| THE Pilton Stage Ltd | Hospitality | 2024 |
| THE Secret Orchard Ltd | Hospitality | 2024 |
| THE Slow Farming Company Limited | Agriculture & fishing | 2017 |
| THE Somerset Association of Local Councils Limited | Public administration | 2019 |
| THE Somerset GIN Company Limited | Manufacturing | 2021 |
| THE Somerset Skin Clinic Ltd | Health & social care | 2023 |
| THE Somerset Wine Company Limited | Wholesale & retail | 2014 |
| THE Visitor Limited | Information & communication | 2005 |
| Tiger Hill Limited | Construction | 1996 |
| TIM Cole Downes Limited | Professional & scientific | 2003 |
| Toy Farm Developments Ltd | Construction | 2013 |
| Tree Hire Ltd | Administrative & support | 2024 |