| 10 Coverton Road Management Company Ltd | Households | 2024 |
| 28 Market Place Limited | Hospitality | 2017 |
| 4 Point Plans Ltd | Professional & scientific | 2007 |
| 5 & 6 Hayes Court Limited | Households | 2006 |
| 5 Minute Fool Limited | Information & communication | 2010 |
| A & H Plant and Construction Limited | Construction | 2013 |
| A & M Pilates Limited | Arts & recreation | 2026 |
| A a Pike Construction Limited | Construction | 2003 |
| A M Beaton & Sons Limited | Agriculture & fishing | 2013 |
| A W Rule & SON GUN Makers Ltd | Wholesale & retail | 2003 |
| A303 Antiques Limited | Wholesale & retail | 2017 |
| AA Pike Group Ltd | Financial services | 2022 |
| AA Pike Holdings Ltd | Financial services | 2023 |
| AA Pike Plant Ltd | Administrative & support | 2022 |
| AA Pike Recycling Ltd | Construction | 2023 |
| Aardvark Motors Ltd | Wholesale & retail | 2014 |
| Abbi Chapel Bridal Ltd | Wholesale & retail | 2015 |
| Acearts Limited | Arts & recreation | 2015 |
| Adept Aviation Consultancy Services Ltd | Transport & logistics | 2025 |
| ADP Resource Ltd | Water & waste | 2016 |
| Advance Fusion Ltd | Hospitality | 2023 |
| Advance Tech Global Ltd | Information & communication | 2023 |
| Adventure Cafe Ltd | Administrative & support | 2002 |
| AEQ Consultancy Ltd | Construction | 2022 |
| Aeroassure Limited | Professional & scientific | 2016 |
| Ajcs Enterprises Ltd | Professional & scientific | 2013 |
| AJM Contractors (SW) Limited | Construction | 2020 |
| AJM Electrical Services (SW) Ltd | Construction | 2014 |
| AJM Group (SW) Limited | Financial services | 2021 |
| AJM Renewables (SW) Limited | Construction | 2021 |
| ALB Vans Ltd | Wholesale & retail | 2022 |
| Alegree Ltd | Wholesale & retail | 2020 |
| ALL FIX Carpentry & Construction Ltd | Construction | 2024 |
| ALL the Property London Limited | Administrative & support | 2018 |
| Alpha Mackay Limited | Wholesale & retail | 2018 |
| Alpha Signs Limited | Administrative & support | 2011 |
| Alyth Consultancy Ltd | Administrative & support | 2018 |
| Amplio Holdings Ltd | Extraterritorial | 2015 |
| Amplio Tender Services Limited | Wholesale & retail | 2013 |
| Ancient & Modern Stonework Services Limited | Construction | 2017 |
| Ancient Capital (Financial Services) Limited | Financial services | 1999 |
| Andy Clark Construction Ltd | Construction | 2026 |
| Aperi Limited | Professional & scientific | 2003 |
| Art for Offices Limited | Wholesale & retail | 1996 |
| Aspen & Spur Ltd | Wholesale & retail | 2026 |
| Audio Factory LLP | | 2014 |
| Auld Friend Limited | Manufacturing | 2018 |
| Avalon Sciences Limited | Manufacturing | 1987 |
| Axar-Eye Ltd | Hospitality | 2025 |
| B & Y Engineering Limited | Manufacturing | 2003 |
| Ballantyne Equity Ltd | Financial services | 2026 |
| Bancombe Joinery Limited | Manufacturing | 2014 |
| Bandroom Properties Limited | Real estate | 2022 |
| Banz UK (2026) Ltd | Wholesale & retail | 2026 |
| Bartletts ELM Management Company (NO.2) Limited | Real estate | 2015 |
| Bath Skips Ltd | Water & waste | 2024 |
| Beauty in a Bar Ltd | Wholesale & retail | 2025 |
| Bespoke Rackets Ltd | Arts & recreation | 2025 |
| Best Relocation Services Ltd | Real estate | 2018 |
| Beyond Bridges Education Ltd | Education | 2024 |
| BF Textiles Limited | Professional & scientific | 2002 |
| BGS Plumbing and Heating Ltd | Construction | 2014 |
| BH Stacey Butchers Limited | Wholesale & retail | 2020 |
| Bistro Belle VIE Ltd | Hospitality | 2026 |
| Blackberry Jobs Ltd | Administrative & support | 2021 |
| Blue Lias Accounting Limited | Professional & scientific | 2006 |
| Blue Parrot Consulting Limited | Professional & scientific | 2023 |
| Boocare Ltd | Health & social care | 2015 |
| BOS Electrical (SW) Ltd | Construction | 2013 |
| Boss-Line Bullyz Ltd | Agriculture & fishing | 2025 |
| Bradley Consultancy Limited | Information & communication | 2023 |
| Breakthrough Innovations Group Limited | Professional & scientific | 2011 |
| Bricky Mate Limited | Wholesale & retail | 2012 |
| Bridport Windows Doors & Conservatories Limited | Construction | 2025 |
| Bright Light Media Ltd | Professional & scientific | 2024 |
| Bruadar Bay Ltd | Professional & scientific | 2024 |
| Bryony Attwood Ltd | Manufacturing | 2023 |
| Bshift Limited | Professional & scientific | 2024 |
| Building Services Consultants Limited | Professional & scientific | 2010 |
| C & C Carpets (UK) Ltd | Wholesale & retail | 2013 |
| C J Renovations Ltd | Construction | 2022 |
| C R Gillett Engineering Consultant Ltd | Professional & scientific | 2026 |
| C.I.D Alarm Services Limited | Administrative & support | 2013 |
| C.I.D Communications Ltd | Information & communication | 2016 |
| C.I.D Fire and Security Limited | Administrative & support | 2000 |
| C27 Media Ltd | Information & communication | 2002 |
| Cadogan Financial Limited | Professional & scientific | 2008 |
| Calvin Consulting Limited | Information & communication | 1998 |
| Camelot Tech Limited | Wholesale & retail | 2001 |
| Cardamom Gallery Limited | Hospitality | 2016 |
| Cash South Limited | Information & communication | 2018 |
| Castlebrand Limited | Transport & logistics | 2008 |
| Castlechurch Limited | Real estate | 2003 |
| Cat Holdings Somerset Ltd | Financial services | 2026 |
| Cbpm Limited | Administrative & support | 2005 |
| Chameleon Manufacturing Company Limited | Water & waste | 1988 |
| Charlie's Classic & Custom Media Limited | Information & communication | 2022 |
| Charlton Agriculture Ltd | Agriculture & fishing | 2024 |
| Chivers and Co Limited | Construction | 2011 |
| Chris Bedwell Ltd | Information & communication | 2007 |