| 11 Market Place (Wincanton) Management Company Limited | Households | 2005 |
| 119 Earlsfield Road Management Company Limited | Households | 2017 |
| 365 Contracting Ltd | Transport & logistics | 2024 |
| A J Davis Demolition, Salvage & Plant Hire Ltd | Construction | 2000 |
| A J Lumley Services Ltd | Construction | 2019 |
| Abbey Hill Steam Rally Limited | Health & social care | 1993 |
| Adam Palmer Transport Limited | Transport & logistics | 2025 |
| Adolescent Safeguarding Consultancy Ltd | Professional & scientific | 2021 |
| Adventures in Sound Ltd | Information & communication | 2013 |
| Al-Ko Gardentech UK Holdings Ltd | Extraterritorial | 1993 |
| Al-Ko Gardentech UK Ltd | Wholesale & retail | 1988 |
| Alex Appleton Jewellers Limited | Wholesale & retail | 2015 |
| ALL Truck and Trailer Spares Limited | Wholesale & retail | 2019 |
| Alvick Property Holdings Limited | Professional & scientific | 1974 |
| Amanda Grapes Design Ltd | Information & communication | 2014 |
| Ancestor Photos Ltd | Professional & scientific | 2022 |
| Arnott Decorating Limited | Construction | 1999 |
| Artautogroup Ltd | Wholesale & retail | 2023 |
| Attic Pictures Limited | Real estate | 2022 |
| Azile Property Management Ltd | Administrative & support | 2025 |
| Bailey and Sun Ltd | Construction | 2017 |
| Barnstorm Productions Limited | Arts & recreation | 2022 |
| Bayford Meadow Ltd | Hospitality | 2023 |
| BCW Longcross Limited | Wholesale & retail | 2022 |
| Beale Group Ltd | Extraterritorial | 2016 |
| Behemoth Publishing Ltd | Information & communication | 2013 |
| Belvedere Bespoke Joinery Ltd | Manufacturing | 1988 |
| Bennetts Field Garage Ltd | Wholesale & retail | 1981 |
| Bermicourt Limited | Professional & scientific | 2015 |
| Biomass Heating Ltd | Wholesale & retail | 2005 |
| Blackhill Conservation Limited | Professional & scientific | 2021 |
| Blue Baltic Entertainment Limited | Other services | 1989 |
| Bluebean Software Ltd | Manufacturing | 2012 |
| Bluecedural Limited | Information & communication | 2023 |
| Bluetech Professional Limited | Information & communication | 2014 |
| Both Hemispheres Ltd | Professional & scientific | 2012 |
| Boxclever Press Ltd. | Wholesale & retail | 2005 |
| Bratton Seymour Service Company Limited | Households | 1984 |
| Bridge Motors (Wincanton) Limited | Wholesale & retail | 1960 |
| Bronzed Tanning Limited | Other services | 2025 |
| Bunker Bushcraft Ltd | Other services | 2019 |
| Busy Lizzy Limited | Information & communication | 2025 |
| Butler Bowen Property Ltd | Real estate | 2025 |
| BUYANDSELL2US Ltd | Wholesale & retail | 2025 |
| BW Finance Limited | Financial services | 2023 |
| C a Foster Ltd | Transport & logistics | 2014 |
| C Langdown Limited | Wholesale & retail | 2023 |
| C. P. Electrical Limited | Professional & scientific | 1988 |
| Camden Ward Limited | Professional & scientific | 2001 |
| Camelot Contractors Limited | Construction | 2007 |
| Camelot Media Ltd | Information & communication | 2007 |
| Capel-Y-Ffin Limited | Hospitality | 2025 |
| Cavalier Way 13-18 RTM Company Limited | Households | 2026 |
| Charles Endirect Limited | Manufacturing | 1984 |
| Church ST Properties Limited | Real estate | 2026 |
| Cici Emporium Ltd | Manufacturing | 2024 |
| CJM Connect Ltd | Professional & scientific | 2023 |
| Clarity View Ltd | Information & communication | 2026 |
| Clarke and Reilly Limited | Administrative & support | 2019 |
| Clementina Delicatessen & Gifts Ltd | Wholesale & retail | 2023 |
| Clucking BEE Wordsmiths Ltd | Arts & recreation | 2020 |
| CNS Amusements Limited | Arts & recreation | 2007 |
| Coach in Nature Ltd | Professional & scientific | 2020 |
| Coconut and Cotton Ltd | Wholesale & retail | 2018 |
| Coffee Merchantsuk Ltd | Wholesale & retail | 2015 |
| Community Patch Project CIC | Agriculture & fishing | 2023 |
| Complex Systems Innovations Limited | Information & communication | 2009 |
| Countrystiles Limited | Wholesale & retail | 1996 |
| Cradle Earth Ltd | Professional & scientific | 2021 |
| Cragg Tech Studio Ltd | Administrative & support | 2024 |
| D Risborough Limited | Professional & scientific | 2009 |
| Dashinn Whippet Ltd | Real estate | 2023 |
| David Braybon Tree Services LLP | | 2024 |
| Dean Hewitt Ltd | Administrative & support | 2017 |
| Debrie Limited | Wholesale & retail | 2003 |
| Delo Enterprises Ltd | Wholesale & retail | 2023 |
| DFD Events Ltd | Hospitality | 2025 |
| Diamond Detailz Limited | Administrative & support | 2024 |
| Digital Medium Ltd | Information & communication | 2017 |
| Disability and Development Partners | Health & social care | 1995 |
| Discorso Limited | Wholesale & retail | 2022 |
| Distinct Films Ltd | Extraterritorial | 2013 |
| DNO Systems Limited | Information & communication | 2014 |
| Dolorgan Associates Limited | Manufacturing | 2005 |
| Donate IT CIC | Administrative & support | 2021 |
| Dorset Fine Dining Ltd | Hospitality | 2014 |
| Dough RI ME Ltd | Manufacturing | 2024 |
| DP Pro Tech Composite Ltd | Manufacturing | 2018 |
| Drivwolf Limited | Education | 2020 |
| Earth Sports Limited | Other services | 2017 |
| Egypt Farm Limited | Agriculture & fishing | 1964 |
| EJ Services Group Ltd | Construction | 2018 |
| EJ Services Ltd | Construction | 2022 |
| Elby Ltd | Extraterritorial | 2019 |
| Ellard Associates Ltd | Professional & scientific | 2014 |
| Ellie Group Ltd | Administrative & support | 2016 |
| Engage Marketing Limited | Professional & scientific | 2016 |
| EYP Property Limited | Real estate | 2015 |
| F.P.A.C. Limited | Construction | 2002 |
| Fernbrook Farm Limited | Agriculture & fishing | 2010 |