| CHT Properties SW Ltd | Real estate | 2020 |
| Cjre Services Ltd | Wholesale & retail | 2023 |
| CJS Transport Services Ltd | Transport & logistics | 2021 |
| CK Roofing (Somerset) Ltd | Construction | 2025 |
| Classic Car Journeys Ltd | Administrative & support | 2016 |
| Clear CUT Consulting Limited | Administrative & support | 2013 |
| Clearway Leisure Ltd | Wholesale & retail | 2023 |
| Clearway Motorhomes Limited | Wholesale & retail | 2005 |
| Cleverglaze Limited | Construction | 2004 |
| Close Care Homes (Somerton) Limited | Construction | 2007 |
| Close Care Homes Limited | Construction | 2015 |
| Clue HQ Somerton Ltd | Arts & recreation | 2018 |
| Coaching Tennis Ltd | Arts & recreation | 2025 |
| Coastal Will Services Limited | Professional & scientific | 2014 |
| Combe Hill Management Company Limited | Real estate | 2016 |
| Compter Limited | Administrative & support | 2005 |
| Compton Rose Consulting Limited | Information & communication | 2017 |
| Compton Street (the Barns) Management Co Ltd | Households | 2026 |
| Concerned Citizens Limited | Other services | 2019 |
| CONFIGUR8OR Limited | Information & communication | 1994 |
| Conrad Mewse Limited | Arts & recreation | 2020 |
| Contour Magazine Ltd | Information & communication | 2026 |
| COOLING4YOU Ltd | Manufacturing | 2023 |
| Cornfield Developments Limited | Construction | 1998 |
| Cornwall Beach Holidays Limited | Hospitality | 2024 |
| Cosmo 11 Limited | Professional & scientific | 2013 |
| Country Glamping Holidays Ltd | Hospitality | 2012 |
| Courthouse Gallery Limited | Wholesale & retail | 2021 |
| COW and Apple (Dorchester) Ltd | Hospitality | 2017 |
| Create & Thrive CIC | Arts & recreation | 2023 |
| Cyber CAB Ltd | Transport & logistics | 2026 |
| Cyber CAB Taxi Ltd | Transport & logistics | 2026 |
| Cyber Taxi CAB Ltd | Transport & logistics | 2026 |
| Cyberati Limited | Professional & scientific | 2016 |
| Cycleution Ltd | Manufacturing | 2025 |
| D J M Electrical (SW) Ltd | Construction | 2015 |
| D&T Construction SW Limited | Construction | 2019 |
| D.L.C.S. Limited | Agriculture & fishing | 1993 |
| DAL Finance Ltd | Financial services | 2014 |
| Daniel Crawford Limited | Construction | 2016 |
| Danner Powell Creative Ltd | Other services | 2021 |
| Danrich Software Ltd | Information & communication | 2025 |
| Darling Bathrooms Ltd | Construction | 2024 |
| Datalan Consulting Limited | Information & communication | 1995 |
| Dave Watts Photography Limited | Professional & scientific | 2015 |
| David Shardlow Orthopaedics Limited | Health & social care | 2018 |
| Davies & Davies Solutions Limited | Information & communication | 2011 |
| Decoy Developers Limited | Households | 2020 |
| Devon Choice Foods Ltd | Wholesale & retail | 2020 |
| DG Distro Ltd | Wholesale & retail | 2022 |
| Dibble Plant Limited | Construction | 2004 |
| Discover Somerton Community Interest Company | Other services | 2024 |
| DJT Transport Limited | Transport & logistics | 2017 |
| Doctrina Media Ltd | Information & communication | 2007 |
| Dominic Tolfts Production Design Limited | Wholesale & retail | 2011 |
| DOT. Pemaniem Limited | Real estate | 1995 |
| Driven Autoworx Ltd | Wholesale & retail | 2024 |
| E-Directories Ltd. | Information & communication | 2009 |
| Earth Dragon Ltd | Agriculture & fishing | 2008 |
| Earthspirit Ltd | Hospitality | 2005 |
| Ecovolt Vehicle Solutions Ltd | Wholesale & retail | 2024 |
| ED Rooke Workshops Ltd | Education | 2026 |
| Edgar Builders Construction Ltd | Construction | 2021 |
| Edgar Builders Ltd | Construction | 2008 |
| Edge Acrobatic Gymnastics CIC | Education | 2021 |
| Edward French Ltd | Wholesale & retail | 2025 |
| Elite Fitness (Yeovil) Limited | Arts & recreation | 2005 |
| Enterprise Service Solutions Ltd | Information & communication | 2019 |
| ESP Equine Limited | Agriculture & fishing | 2021 |
| Even Handed Licensing Limited | Information & communication | 1998 |
| F.S& SON Ltd | Construction | 2023 |
| FAR Field Exploits Limited | Manufacturing | 2019 |
| Farmers Global Foods Ltd | Wholesale & retail | 2011 |
| Farmers Global Holdings Ltd | Financial services | 2024 |
| Fecv & DS Ltd | Real estate | 2024 |
| Festival Medical Services | Health & social care | 2007 |
| Fifty Bees CIC | Education | 2024 |
| Figs Catering Ltd | Hospitality | 2014 |
| Fine Tuned Brewery Limited | Manufacturing | 2015 |
| Fitley Ltd | Information & communication | 2026 |
| Flagstone Restoration Limited | Construction | 2023 |
| Flower Preservation Workshop Ltd | Arts & recreation | 2015 |
| Flux AI Solutions Ltd | Information & communication | 2023 |
| Focuz Ltd | Wholesale & retail | 1998 |
| Forged on the Levels Ltd | Manufacturing | 2021 |
| Fortiv Ltd | Public administration | 2026 |
| Foundrax Engineering Products Limited | Manufacturing | 1948 |
| Freedom Dairy Systems Limited | Wholesale & retail | 2010 |
| Freeplay Retro Arcades Ltd | Arts & recreation | 2025 |
| Freshmoor Ltd | Hospitality | 2020 |
| Fripper Limited | Other services | 2020 |
| G P Davis & SON Ltd | Construction | 2026 |
| G&S Bespoke Ltd | Manufacturing | 2022 |
| Girling Fishing Ltd | Wholesale & retail | 2016 |
| Glencoe Shortlands Limited | Households | 1996 |
| Glencoe Shortlands Residents Limited | Households | 2025 |
| Global Excellence Team Limited | Professional & scientific | 2023 |
| Global Unity Logic Ltd | Information & communication | 2019 |
| Glover Corp Ltd | Arts & recreation | 2022 |
| Go Left Fitness Ltd | Health & social care | 2023 |