| 10 Southwest Ltd | Hospitality | 2024 |
| 101 Holidays Limited | Information & communication | 2011 |
| 104+ Ltd | Manufacturing | 2023 |
| 14 & 14A the Green West Bay Management Limited | Real estate | 2021 |
| 163 VG RTM Company Limited | Households | 2024 |
| 1690 Limited | Arts & recreation | 2020 |
| 19 Glendinning Avenue Property Management Company Limited | Households | 1991 |
| 19 Pleasant Place Management Company Limited | Real estate | 2015 |
| 2 Downes Street & 13 RAX Lane Bridport Management Ltd | Real estate | 2020 |
| 2020 Skate and Ride CIC | Arts & recreation | 2020 |
| 21 Abbotsbury Road Weymouth RTM Company Limited | Households | 2011 |
| 23 John Street Management Company Limited | Real estate | 1992 |
| 24 ST Andrews Road Limited | Administrative & support | 2006 |
| 3 Hours West Limited | Professional & scientific | 2010 |
| 5 North Allington Management Company Limited | Households | 2019 |
| 56-58 West Street Bridport Management Limited | Real estate | 2024 |
| 7 North Allington Bridport Management Limited | Real estate | 2000 |
| 74 Richborne Terrace Limited | Households | 2011 |
| 77 East Street Bridport Limited | Households | 2018 |
| 80 ST Andrews Road Bridport Limited | Real estate | 2001 |
| 84 ST. Andrews Road Management Limited | Real estate | 1981 |
| 96 Loftus Road Management Limited | Households | 1996 |
| A & G Garage Doors Ltd | Construction | 2024 |
| A G Down Memorials Limited | Other services | 2020 |
| A J Holmes Building Ltd | Construction | 2025 |
| A J Wakely & Sons Ltd. | Other services | 1986 |
| A R D Production Ltd | Information & communication | 2011 |
| A-Cask Limited | Wholesale & retail | 2024 |
| A.J.S Agri Ltd | Manufacturing | 2024 |
| A.R. & M.J. Harding Construction Limited | Construction | 2010 |
| A.Speed of Wool Limited | Hospitality | 1967 |
| Abelcraft Ltd | Wholesale & retail | 2018 |
| Ace Base Fields Limited | Extraterritorial | 2007 |
| Ackerman Engineering Limited | Manufacturing | 1976 |
| Ackstrad Ltd | Hospitality | 2026 |
| Acme Strategy Ltd | Information & communication | 2020 |
| Acnorbry Limited | Information & communication | 2003 |
| Actionline Decorating Ltd | Construction | 2011 |
| Activo Management Limited | Professional & scientific | 2001 |
| Adismoto Ltd | Administrative & support | 2025 |
| Advanced Fuel Development Limited | Administrative & support | 2022 |
| Aethermedia Ltd | Information & communication | 2025 |
| Afterwards Ltd | Wholesale & retail | 2019 |
| AGE and Disability Advice Centre Limited | Information & communication | 2010 |
| AGE of Light Innovations Ltd | Professional & scientific | 2020 |
| AJ Wakely and Sons Holdings Ltd | Financial services | 2026 |
| Ajmining Ltd | Mining & quarrying | 2020 |
| AJW Investment Holdings Limited | Real estate | 2019 |
| Alan Beadle Limited | Wholesale & retail | 2002 |
| Alex Pole Ltd | Manufacturing | 2020 |
| Alexander Hospitality Ltd | Hospitality | 2022 |
| Alinel UK Limited | Manufacturing | 2023 |
| Alison Hammond Ltd | Arts & recreation | 2014 |
| Alive Biometrics Ltd | Information & communication | 2026 |
| ALL Clear Ltd | Administrative & support | 2025 |
| Allied Packaging Limited | Wholesale & retail | 2002 |
| Aloe Loungewear Limited | Wholesale & retail | 2001 |
| Alogen Limited | Professional & scientific | 2012 |
| Alpha Learning Ltd. | Information & communication | 2004 |
| Amanuensis Business Services Ltd | Administrative & support | 2010 |
| Ambianz Ltd | Administrative & support | 2017 |
| Ammonite Competitions Ltd | Wholesale & retail | 2025 |
| Ammonite Psychology Ltd | Education | 2025 |
| Ampersand Picture Limited | Information & communication | 2023 |
| Amsafe Bridport Limited | Transport & logistics | 1915 |
| Analogue April CIC | Health & social care | 2025 |
| Anco Consultants Limited | Other services | 2016 |
| Angel Architecture Ltd | Professional & scientific | 2014 |
| Angel Carers (UK) Ltd | Health & social care | 2007 |
| Angel Carers Ltd | Health & social care | 2025 |
| Angelpowers Limited | Professional & scientific | 2003 |
| Angels Financial Solutions Limited | Financial services | 2017 |
| Animae Mundi Limited | Professional & scientific | 2026 |
| Animal House Bridport Ltd | Wholesale & retail | 2018 |
| Anita Tattershall Physiotherapy Limited | Other services | 2013 |
| Antoine Barker Consulting Solutions Ltd | Professional & scientific | 2021 |
| Apers Ltd | Professional & scientific | 2022 |
| Applewood Developments Limited | Construction | 2006 |
| ARC Consulting International Ltd | Professional & scientific | 2025 |
| ARC Edge Metalwork Ltd | Manufacturing | 2021 |
| Archq Global Limited | Information & communication | 2025 |
| Arctus Concierge Limited | Other services | 2024 |
| Ardenwick Assets 1 Limited | Financial services | 2026 |
| Ardenwick Assets 2 Limited | Financial services | 2026 |
| Artemystica Ltd | Manufacturing | 2020 |
| Artlyst Limited | Information & communication | 2016 |
| Arucaria Construction Services Limited | Construction | 2025 |
| Asado Fire Kitchen Limited | Hospitality | 2024 |
| ASG Financial Services Limited | Professional & scientific | 2013 |
| Ashtin Limited | Households | 1982 |
| Asker Mill Limited | Construction | 2020 |
| Asphalt City Films Limited | Information & communication | 2024 |
| ATN Developments Ltd | Construction | 2023 |
| Atrim Farm Limited | Administrative & support | 2014 |
| Attune Edge Ltd | Other services | 2026 |
| Auracle Learning Ltd | Information & communication | 2026 |
| Aurex Alpha Ltd | Professional & scientific | 2022 |
| Aurora (SME) Ltd | Professional & scientific | 2020 |
| Back 2 Basics Consultancy Limited | Professional & scientific | 2021 |
| Badger Developments (London) Ltd | Construction | 2001 |