| A & H Estates (South West) Ltd | Real estate | 2017 |
| A & L Care Homes Holdings Limited | Professional & scientific | 2008 |
| A & L Care Homes Limited | Health & social care | 2002 |
| A & L Family Investments Limited | Financial services | 2025 |
| A & L Residential Properties Limited | Real estate | 2014 |
| A & M Enterprises Limited | Real estate | 2019 |
| A & M Security Limited | Administrative & support | 2008 |
| A & P Logs Ltd | Wholesale & retail | 2026 |
| A a Anyamele & Sons Limited | Health & social care | 2016 |
| A and H Bricklaying Limited | Construction | 2021 |
| A B Heating Solutions Ltd | Construction | 2016 |
| A Black Ltd | Transport & logistics | 2017 |
| A Boiler 4 U Ltd | Construction | 2015 |
| A C Haines Engineering Ltd | Manufacturing | 2002 |
| A Chavez Ltd | Health & social care | 2019 |
| A Colley Plumbing & Heating Limited | Construction | 2005 |
| A Custom Home Ltd | Construction | 2019 |
| A G Edgecombe Properties Limited | Real estate | 1952 |
| A G Tyres Ltd | Wholesale & retail | 2022 |
| A GAS Engineer Limited | Construction | 2022 |
| A Hall Marine Ltd | Professional & scientific | 2025 |
| A Hilton Consultancy Ltd | Construction | 2016 |
| A Home After Halls Limited | Real estate | 2013 |
| A J Barnes Plumbing & Heating Limited | Construction | 2003 |
| A J Davis (Enviroelectrical Engineers) Limited | Professional & scientific | 2019 |
| A J Gore Properties Ltd | Real estate | 2025 |
| A J Sansum Construction Ltd Ltd | Construction | 2016 |
| A K Carpentry Ltd | Manufacturing | 2022 |
| A K Motor Services (Plymouth) Ltd | Wholesale & retail | 2010 |
| A K Property Services (SW) Ltd | Real estate | 2022 |
| A Labels Limited | Wholesale & retail | 2018 |
| A M Grocery Store Ltd | Wholesale & retail | 2019 |
| A M Realestate(Uk) Ltd | Real estate | 2025 |
| A Macpherson & Co Limited | Professional & scientific | 2020 |
| A Mari Usque AD Mare Ltd | Real estate | 2024 |
| A P Motors (Plymouth) Limited | Transport & logistics | 2003 |
| A Palmer Services Ltd | Administrative & support | 2015 |
| A Parrish Building Services Ltd | Construction | 2020 |
| A Partnership Called Fish Limited | Other services | 2003 |
| A Place to Call Home Ltd | Real estate | 2019 |
| A Preston Building Services Ltd | Construction | 2024 |
| A Rails Plymouth Ltd | Wholesale & retail | 2025 |
| A S a (SW) Limited | Hospitality | 2025 |
| A S Jarrett Limited | Construction | 2003 |
| A Space to Thrive Ltd | Education | 2023 |
| A Squared Events CIC | Administrative & support | 2024 |
| A Star Solutions Group Ltd | Construction | 2021 |
| A Task Inha Ltd | Hospitality | 2023 |
| A Taste of Class Bars Ltd | Hospitality | 2026 |
| A Taste of Class Catering Ltd | Hospitality | 2025 |
| A V Creative Limited | Professional & scientific | 2016 |
| A W B Installations Limited | Construction | 2016 |
| A W Heating & Plumbing Limited | Construction | 2004 |
| A Winn Electrical Services Limited | Construction | 2018 |
| A&A Concrete Holdings Limited | Financial services | 2025 |
| A&A Concrete Repair Building and Maintenance Limited | Construction | 2022 |
| A&A Concrete Repair Limited | Construction | 2005 |
| A&B Fire Ltd | Construction | 2018 |
| A&B Plymouth Ltd | Wholesale & retail | 2023 |
| A&D Installations Limited | Construction | 2024 |
| A&G Marshall Group Limited | Financial services | 2019 |
| A&M UK Stores Ltd | Wholesale & retail | 2025 |
| A&R Builders (South West) Limited | Construction | 2026 |
| A&R Garage Services Ltd | Wholesale & retail | 2024 |
| A&T Housing Solutions C.I.C. | Real estate | 2020 |
| A-Dsp Consulting Limited | Professional & scientific | 2013 |
| A. & a. Bell Marquee Hire Limited | Administrative & support | 1998 |
| A. L. Sayers (Holbeton) Limited | Agriculture & fishing | 1960 |
| A. Sharp Limited | Construction | 2002 |
| A.A.M Transport Ltd | Construction | 2026 |
| A.D. Building Ltd | Construction | 2000 |
| A.D.E.G. Limited | Real estate | 2004 |
| A.D.G. Consultancy Limited | Professional & scientific | 1998 |
| A.D.H. Design Limited | Professional & scientific | 1994 |
| A.Dosky Ltd | Households | 2019 |
| A.E. Andrew (Developments) Limited | Extraterritorial | 1964 |
| A.F Lounge Ltd | Hospitality | 2025 |
| A.F. Brown & Sons Limited | Other services | 2000 |
| A.F. ST John Plumbing and Heating (Plymouth) Limited | | 1989 |
| A.I.R Grill House Limited | Hospitality | 2019 |
| A.J. Derrys Cross Developments (Plymouth) Limited | Construction | 2022 |
| A.J. Developments (Plymouth) Holdings Limited | Financial services | 2023 |
| A.J. Developments (Plymouth) Limited | Real estate | 2021 |
| A.M Coffee Time Ltd | Hospitality | 2025 |
| A.M.Corner Shop Ltd | Wholesale & retail | 2018 |
| A.M.E Builders Ltd | Construction | 2020 |
| A.M.T. Motor Services Ltd | Wholesale & retail | 2008 |
| A.R. Property Consultancy Ltd | Professional & scientific | 2013 |
| A.S 24/7 Property Management Limited | Construction | 2025 |
| A.W Roofing (SW) Limited | Construction | 2025 |
| A1 Automobile Garage Ltd | Wholesale & retail | 2025 |
| A1 Developments (SW) Ltd | Construction | 2024 |
| A1 Electrical Services (SW) Limited | Construction | 2012 |
| A1 Properties Maintenance Ltd | Manufacturing | 2020 |
| A2B Car Sales (Buckley) Ltd | Wholesale & retail | 2016 |
| A2B Fencing Solutions Ltd | Construction | 2021 |
| A2Z Property Management (Plymouth) Ltd | Real estate | 2011 |
| A38 Mate Ltd | Wholesale & retail | 2025 |
| A4W Inspection Limited | Professional & scientific | 2014 |
| A88 Ltd | Hospitality | 2026 |