| Busy Hill Limited | Hospitality | 2019 |
| Bute Motorsport Limited | Arts & recreation | 2007 |
| BY Courtney Louise Ltd | Other services | 2025 |
| C F Ridout & SON Limited | Agriculture & fishing | 2012 |
| C J Crang and SON Ltd | Agriculture & fishing | 2014 |
| C M T P Ltd | Manufacturing | 1986 |
| C R C Starr Ltd | Agriculture & fishing | 1997 |
| C.D Tiling Contractors Ltd | Construction | 2019 |
| C.Gundry Ltd | Real estate | 2026 |
| Cains Farm Limited | Wholesale & retail | 2015 |
| Calle 82 Data Consultancy Services Ltd | Information & communication | 2025 |
| Callum Morton Limited | Real estate | 2022 |
| Calm Transitions Ltd | Administrative & support | 2026 |
| Camel Trading Company Limited(The) | Financial services | 1982 |
| Camelot Chase Holdings Ltd | Professional & scientific | 2015 |
| Camelot Chase Limited | Real estate | 2014 |
| Cameron Clark Properties Ltd | Real estate | 2012 |
| Campbell Rowe Group Limited | Financial services | 2024 |
| Campbell Rowe Properties Limited | Real estate | 2020 |
| Canprop Espana Limited | Construction | 2014 |
| Canprop Espana Three Limited | Construction | 2016 |
| Canprop Espana Two Limited | Real estate | 2014 |
| Canprop I Limited | Real estate | 2012 |
| Canprop II Limited | Construction | 2016 |
| Cantelo Lighting Ltd | Manufacturing | 2021 |
| Captain Chaos Ltd | Arts & recreation | 2017 |
| Car NET (UK) Limited | Wholesale & retail | 2005 |
| Cardinali & Gatti Limited | Hospitality | 2024 |
| Cardyl Property Ltd | Real estate | 1991 |
| Career Check Limited | Administrative & support | 2000 |
| Careers Team Ltd | Manufacturing | 2019 |
| Carevera Care Limited | Administrative & support | 2026 |
| Carevera Home Care Limited | Administrative & support | 2026 |
| Carlton Clocks Limited | Wholesale & retail | 2005 |
| Carol Prior BIA Ltd | Health & social care | 2016 |
| Caroline Carrier Coaching Ltd | Other services | 2024 |
| Carricol Limited | Hospitality | 2023 |
| Carsington Limited | Hospitality | 2003 |
| Cartgate Lodge Cafe Ltd | Hospitality | 2023 |
| Cartgate Services Ltd | Hospitality | 2023 |
| Casa DEL Artista Ltd | Hospitality | 2021 |
| Casamo Ecommerce Ltd | Wholesale & retail | 2018 |
| Casey Construction Yeovil Ltd | Construction | 2019 |
| Casey Homes (Yeovil) Ltd | Construction | 2023 |
| Cashel Fire Limited | Manufacturing | 2015 |
| Cassidy Pubs Limited | Hospitality | 2022 |
| Castella Ltd | Real estate | 2019 |
| Castello Restaurant Yeovil Ltd | Hospitality | 2019 |
| Castle Building and Construction Limited | Construction | 2000 |
| Casy House Limited | Health & social care | 2017 |
| Cathedral Park Nominee Limited | Professional & scientific | 2011 |
| Catherine's Healthcare Ltd | Administrative & support | 2017 |
| Cato Strategic Limited | Financial services | 2010 |
| Caveman Sound Ltd | Administrative & support | 2024 |
| CB Resourcing Strategies Ltd | Professional & scientific | 2024 |
| Cbrc Ltd. | Professional & scientific | 2023 |
| CCM Electrics Limited | Construction | 2007 |
| CD Stuckey Developments Limited | Construction | 2002 |
| Celia Gould Limited | Wholesale & retail | 2014 |
| Centre for Systemic Constellations Limited | Other services | 2012 |
| Century Park Management (Yeovil) Limited | Households | 2004 |
| Cetsat Ltd | Administrative & support | 2001 |
| Cevolution Software Limited | Information & communication | 2006 |
| Cfjb Properties Ltd | Real estate | 2023 |
| Cfvj Properties Limited | Financial services | 2024 |
| CG Beauty Ltd | Other services | 2018 |
| CGF Associates Limited | Transport & logistics | 2020 |
| CGW Plant Hire Ltd | Construction | 2019 |
| CH Real Estate (U.K.) Ltd | Real estate | 2020 |
| Chain Gang Bike Repairs Ltd | Manufacturing | 2019 |
| Chalk & Padel Limited | Arts & recreation | 2025 |
| Chameleon Roofing Limited | Construction | 2025 |
| Changing Constants Limited | Administrative & support | 2005 |
| Chanse Limited | Construction | 2006 |
| Charcoal Catering Ltd | Hospitality | 2020 |
| Chard Manse Ltd | Real estate | 1987 |
| Chard Self-Store Limited | Transport & logistics | 2006 |
| Charles-John David Construction Limited | Construction | 2021 |
| Charles-John David Developments Limited | Construction | 2020 |
| Charles-John David Holdings Limited | Financial services | 2020 |
| Charles-John David Property Management Limited | Real estate | 2019 |
| Charlie King Agriculture Limited | Wholesale & retail | 2009 |
| Charlotte Place Holdings Ltd | Real estate | 2015 |
| Charlotte Place Properties Ltd | Real estate | 2015 |
| Charmed Web LLP | | 2025 |
| Charterhouse Auctioneers Limited | Wholesale & retail | 2014 |
| Chavaran Associates Ltd | Professional & scientific | 2025 |
| Cheriton Estates Management Limited | Real estate | 2019 |
| Chesshead Ltd | Manufacturing | 2023 |
| Chesters Commercial Limited | Real estate | 2019 |
| Chestnut Lodge (Torquay) Limited | Households | 2025 |
| Chilton Cantelo Estates Ltd | Real estate | 2020 |
| Choice Kitchen Ltd | Manufacturing | 2025 |
| Chois Delight Limited | Hospitality | 2024 |
| Chott Developments Ltd | Construction | 2021 |
| Chris Anastasi Limited | Information & communication | 2026 |
| Chris Monk Numerology Ltd | Health & social care | 2025 |
| Chris Osmond Limited | Construction | 2009 |
| Chrisandjackhospitality Ltd | Hospitality | 2025 |
| Christopher R Barber Racing Ltd | Wholesale & retail | 2022 |