| "Gnaw N RAW" Ltd | Wholesale & retail | 2026 |
| 12 the Parade Swanage Limited | Households | 2000 |
| 130 High Street (Swanage) Management Company Limited | Households | 2018 |
| 14 Ulwell Road Management Company Limited | Households | 1990 |
| 17 Harbledown Road Limited | Real estate | 2007 |
| 1898 Holdings (Portsmouth) Limited | Real estate | 2012 |
| 1BBANDB Ltd | Professional & scientific | 2009 |
| 2 Gilbert Road Freehold Limited | Households | 2013 |
| 2 the Parade Limited | Real estate | 2022 |
| 20 Park Road Management Company Limited | Hospitality | 2003 |
| 224 KHS Developments Limited | Real estate | 2007 |
| 23 Park Road (Swanage) Management Company Limited | Households | 2001 |
| 28 Park Road Management Ltd | Households | 2017 |
| 2BBANDB Limited | Professional & scientific | 2021 |
| 3 Properties Limited | Households | 2009 |
| 31 King Henry's Road Limited | Households | 1983 |
| 3D Security Systems Limited | Administrative & support | 2018 |
| 3WORX Ltd | Wholesale & retail | 2022 |
| 4 Burlington Road Management Limited | Households | 2007 |
| 4 the Square Management Ltd | Households | 2026 |
| 45 CI Limited | Professional & scientific | 2016 |
| 45 Foxholes Limited | Wholesale & retail | 2015 |
| 4MATT Framers Ltd | Arts & recreation | 2003 |
| 50 Degrees North Limited | Information & communication | 2026 |
| 9 Highcliffe Road Management Company Ltd | Households | 2008 |
| A J Steel Erecting Ltd | Construction | 2023 |
| A J Steel Ltd | Construction | 2015 |
| A R Harris & SON Electrical Contractors Limited | Construction | 2002 |
| A S Hobbs Ltd | Construction | 2018 |
| A Splendid Time Productions Limited | Information & communication | 2016 |
| A.D. Hewitt Ltd | Professional & scientific | 2005 |
| AA Orchard Windows Ltd | Construction | 2019 |
| Acton Field Campsite Limited | Hospitality | 2002 |
| Aedificium Conservation Ltd | Construction | 2019 |
| AJM Holdings (Southern) Ltd | Real estate | 2018 |
| Alan Harris Plumbing & Heating Ltd | Construction | 2013 |
| Alan Yates Electrical Ltd | Construction | 2022 |
| Albany Court (Swanage) Limited | Households | 1998 |
| Aldeas Limited | Information & communication | 2007 |
| Aliard Limited | Professional & scientific | 2016 |
| Allsort'D C.I.C. | Education | 2019 |
| Alogis Ltd | Professional & scientific | 2020 |
| Alrose Villa Associates Limited | Households | 2022 |
| Amber Hall Jewellery Limited | Wholesale & retail | 2005 |
| Andy Merry Limited | Wholesale & retail | 2003 |
| Apexweb Ltd. | Manufacturing | 2014 |
| App-Venture-Uk Ltd | Wholesale & retail | 2019 |
| Apple Developments Ltd | Construction | 2005 |
| Aquatic Canine Therapy (South) Ltd | Professional & scientific | 2015 |
| Arete Professional Services Ltd | Information & communication | 2025 |
| ARK Medical Solutions Limited | Wholesale & retail | 2024 |
| Ashley Apartments Limited | Households | 2003 |
| Ashley House (Swanage) Management Company Limited | Real estate | 2000 |
| Astoria Properties Limited | Real estate | 2021 |
| Astuteblue Consultants Limited | Professional & scientific | 2017 |
| AT Flooring Specialists Ltd | Construction | 2021 |
| Athena Welding Ltd | Manufacturing | 2015 |
| Atlantic European Limited | Administrative & support | 1992 |
| Atom LFA Ltd | Administrative & support | 2022 |
| Automatic Choice International Limited | Wholesale & retail | 2003 |
| Automatic Choice Limited | Wholesale & retail | 1992 |
| Avenue House (Swanage) Management Company Limited | Households | 1991 |
| Avoco Identity Limited | Information & communication | 2005 |
| Avoco Secure Limited | Information & communication | 2003 |
| AXE Valley Mining Consultants Limited | Mining & quarrying | 2011 |
| B H Electrical Dorset Ltd | Construction | 2013 |
| Ballard Estate Company Limited(The) | Households | 1939 |
| Ballard Rise Management Company Limited | Households | 2006 |
| Bardini Engineering Limited | Construction | 2003 |
| Barrio Real Estate Partners LLP | | 2024 |
| Bars in Swanage Ltd | Hospitality | 2023 |
| Bathman Services Ltd | Construction | 2002 |
| Bay Lodge Apartments Limited | Households | 2024 |
| Bay View Beach Chalets Limited | Households | 2002 |
| BCP Developments Ltd | Real estate | 2021 |
| Beachcote Homes Limited | Construction | 1999 |
| Beachside Court (Swanage) Limited | Households | 2006 |
| Beachy Brunch Limited | Hospitality | 2025 |
| Beachy Estates Limited | Real estate | 2025 |
| Beautiful Spaces by Design Ltd | Construction | 2021 |
| Belle VUE Residents' Association Limited | Households | 1973 |
| Bentley Anp.Locums Ltd | Health & social care | 2013 |
| BG Books Limited | Wholesale & retail | 2026 |
| BH Property Contracts Limited | Construction | 2025 |
| Billionhair Swanage Limited | Other services | 2024 |
| Bills Wheels Driving School Ltd | Education | 2025 |
| Bipcom Limited | Information & communication | 2001 |
| Birch OIL & Plumbing Ltd | Construction | 2008 |
| Birley Hall Management Company Limited | Households | 2000 |
| Bj's Hospitality Ltd | Hospitality | 2023 |
| Black Stone Commercial Finance Ltd | Financial services | 2019 |
| Blue Dog Consultancy Ltd | Professional & scientific | 2019 |
| Blue Dove Home Support Limited | Households | 2025 |
| Blue Fish Design & Build Ltd | Construction | 2014 |
| Blue Level Hosting Limited | Information & communication | 2006 |
| Blue Town Planning Ltd | Professional & scientific | 2021 |
| Blues Roots | Arts & recreation | 2010 |
| Blush Hair & Training Ltd | Other services | 2021 |
| Bodam Properties Limited | Real estate | 2002 |
| Bolton Group Developments Ltd | Construction | 2025 |