| Quantock Casualty Services Limited | Agriculture & fishing | 2004 |
| Quantock D&D Services Ltd | Professional & scientific | 2020 |
| Quantock Day Care Ltd | Health & social care | 2026 |
| Quantock Ecology Limited | Professional & scientific | 2016 |
| Quantock Farm Machinery Ltd | Wholesale & retail | 2016 |
| Quantock Financial Services Ltd | Financial services | 2020 |
| Quantock Funeral Directors Ltd | Other services | 2024 |
| Quantock Joinery Systems Limited | Manufacturing | 1996 |
| Quantock Lavender Company Limited | Wholesale & retail | 2013 |
| Quantock Lettings Ltd | Households | 2024 |
| Quantock Outdoor Education Limited | Education | 2021 |
| Quantock Patterns Limited | Manufacturing | 2010 |
| Quantock Property Investments Ltd | Real estate | 2020 |
| Quantock Property Management Limited | Real estate | 2013 |
| Quantock Services (Southwest) Limited | Administrative & support | 2021 |
| Quantock Talent Limited | Administrative & support | 2026 |
| Quantock View (Williton) Management Company Limited | Households | 1982 |
| Quantock View Residents Management Company Limited | Households | 2019 |
| Quantox Digital Ltd | Professional & scientific | 2019 |
| Quantum Power Dynamics Ltd | Professional & scientific | 2024 |
| Quarter Circle Games Limited | Information & communication | 2015 |
| Quarterpast Direct UK Ltd | Wholesale & retail | 2020 |
| Quasar MK Limited | Information & communication | 2014 |
| Quaytel Limited | Information & communication | 2024 |
| Qube Construct Holdings Limited | Construction | 2020 |
| Qube Construct Ltd | Construction | 2008 |
| Qube Construction Solutions Ltd | Real estate | 2007 |
| Qube Workplace Limited | Extraterritorial | 2013 |
| Queen Street Garage (Taunton) Limited | Wholesale & retail | 2008 |
| Queen's College Taunton Enterprises Limited | Other services | 1992 |
| Queen's College Taunton Foundation | Education | 2002 |
| Queens Bees Ltd | Administrative & support | 2025 |
| Quest Cars Limited | Transport & logistics | 2004 |
| Quickly Divorce Ltd | Professional & scientific | 2013 |
| Quidsaver Limited | Financial services | 2023 |
| Quietscheme Limited | Professional & scientific | 2005 |
| Quiggin Equine Vets Ltd | Professional & scientific | 2023 |
| Quilldenfox Ltd | Information & communication | 2025 |
| Quince Honey Farm Ltd | Financial services | 2025 |
| Quince Honey Production Limited | Manufacturing | 2025 |
| Quinrentals Ltd | Real estate | 2022 |
| Quinta Essentia Ltd | Professional & scientific | 2007 |
| Quinvest Ltd | Financial services | 2022 |
| Quipit Limited | | 1988 |
| Quontock Restoration Ltd | Construction | 2024 |
| Quoteportal.Net Limited | Information & communication | 2018 |
| QVH Properties Limited | Real estate | 2017 |
| Qwerty Support Ltd | Information & communication | 2016 |
| R & a Commercials Limited | Wholesale & retail | 2008 |
| R & a Cromhall Limited | Hospitality | 2016 |
| R & D Electrical Solutions Limited | Construction | 2006 |
| R & E J Bowker Ltd | Agriculture & fishing | 2026 |
| R & E Kingman & SON Limited | Agriculture & fishing | 2012 |
| R & J Construction (South West) Limited | Construction | 2005 |
| R & J Sweet Building Services Limited | Construction | 2008 |
| R & M Transport (Southwest) Limited | Transport & logistics | 2024 |
| R & P Farming Limited | Agriculture & fishing | 2003 |
| R & R Renovations (Southwest) Limited | Real estate | 2021 |
| R & SS Norquay Ltd | Financial services | 2025 |
| R B S Civils Limited | Construction | 2018 |
| R Cheriton & Sons Ltd | Agriculture & fishing | 2003 |
| R Curtis Plant Ltd | Construction | 2013 |
| R Engineering Limited | Professional & scientific | 2016 |
| R Haines UK Holdings Limited | Financial services | 2026 |
| R Hort Limited | Professional & scientific | 2019 |
| R L Jones & Sons Limited | Agriculture & fishing | 1952 |
| R Liddell Consultancy Ltd | Information & communication | 2026 |
| R Mcdonald Consulting Ltd | Transport & logistics | 2025 |
| R Norman Building Contractors Ltd | Construction | 2023 |
| R Property Limited | Real estate | 2018 |
| R S 2000 Properties Limited | Real estate | 2001 |
| R W Gale Limited | Construction | 2005 |
| R Wallis Ltd | Agriculture & fishing | 2022 |
| R-I-D-E SW Ltd | Transport & logistics | 2024 |
| R. C. Warr & SON Limited | Construction | 2003 |
| R. I. Leyman Limited | Construction | 2014 |
| R. M. Holmes Limited | Agriculture & fishing | 2021 |
| R. T. Keedwell Holdings Limited | Professional & scientific | 1983 |
| R.E.F. Electrics (Taunton) Limited | Construction | 1976 |
| R.E.F. Electrics Holdings Limited | Financial services | 2026 |
| R.J. Hayes Limited | Real estate | 1971 |
| R.T. Keedwell Limited | Transport & logistics | 1982 |
| R.W & S.V Powell Ltd | Financial services | 2022 |
| R.W.Hobbs (Kelmscott) Limited | Agriculture & fishing | 1956 |
| R2C Project Consultants Ltd | Professional & scientific | 2026 |
| R2R Property Services South West Ltd | Real estate | 2025 |
| R8 Roofing Limited | Construction | 2015 |
| Raccoon Digital Limited | Information & communication | 2021 |
| Race at Your Pace Limited | Arts & recreation | 2018 |
| Race Bay Group Ltd | Professional & scientific | 2023 |
| Racey Music Limited | Information & communication | 2016 |
| Rachel Dixon Ltd | Hospitality | 2020 |
| Rachel E. Spencer Ltd | Wholesale & retail | 2023 |
| Racka (Zackel) Sheep Society Ltd | Agriculture & fishing | 2021 |
| Rackclose House Management Limited | Households | 1999 |
| Rackheath Vets Limited | Professional & scientific | 2021 |
| Rackleighs Consulting Limited | Construction | 2025 |
| Rad&Mar Ltd | Wholesale & retail | 2025 |
| Raddington Engineering Ltd | Professional & scientific | 2023 |
| Radpros Limited | Professional & scientific | 2010 |