| 124-126 Fortuneswell RTM Company Limited | Households | 2021 |
| 128/130 Fortuneswell Portland Management Company Limited | Households | 2023 |
| 13 Park Road RTM Company Limited | Households | 2023 |
| 15 Dorchester Road Limited | Hospitality | 1997 |
| 153 - 163 Weston Street Ltd | Households | 2021 |
| 18 East Street Weymouth Management Limited | Households | 2005 |
| 180 Fitness Hub Limited | Arts & recreation | 2024 |
| 180 Recovery Hub Limited | Arts & recreation | 2025 |
| 22.3 Kebab Limited | Hospitality | 2025 |
| 30 Montrose Close Weymouth Management Company Limited | Households | 2017 |
| 31 Queens Road (Portland) Limited | Real estate | 2008 |
| 72 Hawksley Road Limited | Real estate | 2011 |
| 77 Fortuneswell (Management) Limited | Real estate | 2008 |
| A2E Medical Services Ltd | Health & social care | 2014 |
| A2Z Landscapes Limited | Administrative & support | 2024 |
| ABC Adventures Ltd | Arts & recreation | 2021 |
| Active Days Event & Promotions Ltd | Arts & recreation | 2025 |
| Admiralty Care Home Limited | Health & social care | 2023 |
| Admiralty Hotel & Restaurant Ltd | Hospitality | 2020 |
| Agin Care Homes Limited | Administrative & support | 2010 |
| Agincare (Castletown) Limited | Administrative & support | 2015 |
| Agincare (Somerset) Limited | Health & social care | 2023 |
| Agincare (Southwark) Limited | Health & social care | 2023 |
| Agincare Children's Services Limited | Health & social care | 2024 |
| Agincare Enable Limited | Health & social care | 2018 |
| Agincare Extra Care Services Limited | Administrative & support | 2010 |
| Agincare Group Limited | Administrative & support | 2007 |
| Agincare Head Office Services Limited | Professional & scientific | 2019 |
| Agincare Heritage Limited | Arts & recreation | 2017 |
| Agincare Holdings Limited | Financial services | 2021 |
| Agincare Home Care Limited | Administrative & support | 2018 |
| Agincare Home Services Limited | Administrative & support | 2010 |
| Agincare Homes (North) Limited | Health & social care | 2018 |
| Agincare Homes Holdings Limited | Health & social care | 2010 |
| Agincare International Limited | Administrative & support | 2021 |
| Agincare Limited | Administrative & support | 1999 |
| Agincare Live-In Care (Central) Ltd | Administrative & support | 2018 |
| Agincare Live-In Care (South East) Ltd | Administrative & support | 2018 |
| Agincare Live-In Care (South West) Limited | Administrative & support | 2018 |
| Agincare Live-In Management Services Limited | Administrative & support | 2018 |
| Agincare Marine Limited | Administrative & support | 2018 |
| Agincare Property Limited | Real estate | 2018 |
| Agincare UK Limited | Administrative & support | 2007 |
| Agincourt Care Home Limited | Health & social care | 2010 |
| Aibs Bookkeeping Limited | Professional & scientific | 2020 |
| AJR Mobile Tyres Ltd | Wholesale & retail | 2025 |
| ALL Bound Solutions Limited | Transport & logistics | 2026 |
| Andrew Simpson Sailing Foundation | Arts & recreation | 2013 |
| Andrew Simpson Watersports Centres Limited | Education | 2014 |
| Aqua Physical Limited | Arts & recreation | 2014 |
| Aqua Portland LLP | | 2010 |
| ASP Group Management Limited | Administrative & support | 2018 |
| ASP Independent Living Limited | Health & social care | 1997 |
| Avpt Ltd | Real estate | 2022 |
| B & G Property Limited | Households | 1999 |
| B-Side Multi Media Festival Community Interest Company | Arts & recreation | 2009 |
| BA Subsea Solutions Limited | Other services | 2021 |
| Ballies Bites Ltd | Hospitality | 2025 |
| Barham Stores Limited | Wholesale & retail | 2021 |
| Barton Consultancy Limited | Professional & scientific | 2013 |
| Battlecombe Ltd | Real estate | 2015 |
| Beaufort Park Limited | Health & social care | 2018 |
| Belle VUE Procurement Ltd | Wholesale & retail | 2015 |
| Bence Jones Limited | Wholesale & retail | 1984 |
| Benson UK, Ltd. | | 2002 |
| Big Squid Diving Limited | Education | 2008 |
| Blackwell Building Solutions Ltd. | Construction | 2021 |
| Blanchs Ltd | Administrative & support | 2024 |
| Blenheim Care Home Limited | Health & social care | 2009 |
| Born Home Ltd | Real estate | 2023 |
| Breakwater Property Asset Limited | Real estate | 2020 |
| Brickhub Dorset Ltd | Arts & recreation | 2026 |
| Brighter Futures 4U Limited | Professional & scientific | 2025 |
| Bristow Taylor Sailing Ltd | Arts & recreation | 2025 |
| Britannia Britannia Limited | Hospitality | 2026 |
| Broken Lantern Studios Ltd | Information & communication | 2025 |
| Brotherton Properties Limited | Hospitality | 2026 |
| Buteo Limited | Wholesale & retail | 2021 |
| C J Shellfish Limited | Manufacturing | 2011 |
| C S Sailing Ltd | Other services | 2013 |
| C&N Electrical Services Ltd | Energy | 2017 |
| Cadco Products Ltd | Wholesale & retail | 2025 |
| Cameron Tweedle Hospitality Ltd | Hospitality | 2025 |
| Canyon Real Estate (Europe) LLC | | 2024 |
| Carv Technologies Limited | Information & communication | 2017 |
| Castletown D-Day Museum CIC | Arts & recreation | 2018 |
| Cavalier Diving LLP | | 2021 |
| Cbirdrne Ltd | Information & communication | 2015 |
| Celartem Inc. | | 2000 |
| Chalgrove Care Home Limited | Health & social care | 2010 |
| Cheriton Care Centre Limited | Health & social care | 2014 |
| Chesil Beach Motors Limited | Wholesale & retail | 2005 |
| Chesil Property Ltd | Real estate | 2019 |
| CHESIL7 Ltd | Agriculture & fishing | 2020 |
| Clean Home Cleaning Solutions Ltd | Administrative & support | 2024 |
| Clean Jurassic Coast CIC | Professional & scientific | 2021 |
| Clean Thing Ltd | Administrative & support | 2020 |
| Coast 2 Country Cleaning Ltd | Administrative & support | 2021 |
| Coda Octopus Martech Limited | Professional & scientific | 1988 |
| Combens (Dorchester) Limited | Wholesale & retail | 2021 |