| 07417710 Limited | | 2010 |
| 1 Step Beyond Support Ltd | Health & social care | 2022 |
| 121 Asset Management Ltd | Construction | 2021 |
| 13 Housing Ltd | Households | 2025 |
| 1440 Collective Ltd | Manufacturing | 2024 |
| 1732 Limited | Professional & scientific | 2023 |
| 19B.UK Ltd | Professional & scientific | 2021 |
| 1ST Call Construction Ltd | Construction | 2019 |
| 1ST Choice Concrete Limited | Construction | 2010 |
| 1ST for Training Limited | Administrative & support | 2004 |
| 24 HR Property Ltd | Real estate | 2024 |
| 247 Healthcare Products Ltd | Manufacturing | 2020 |
| 24HR Active Plumbing Ltd | Construction | 2025 |
| 24SVN Ltd | Professional & scientific | 2024 |
| 2B Lightning Fit Ltd | Other services | 2023 |
| 345 Construction Services Limited | Construction | 2022 |
| 365 Gaming Limited | Arts & recreation | 2022 |
| 37 Round Limited | Manufacturing | 2023 |
| 3D AJF Ultimate Entertainment Limited | Information & communication | 2018 |
| 3D Scanning Solutions Ltd | Professional & scientific | 2021 |
| 3SS Services Ltd | Transport & logistics | 2025 |
| 3TECHSOFT Ltd | Information & communication | 2024 |
| 4 Seasons Gardening Contractors Limited | Administrative & support | 2023 |
| 5050HEALTH.COM Ltd | Professional & scientific | 2025 |
| 65 BIT Consulting Ltd | Information & communication | 2019 |
| 713 Productions Ltd | Construction | 2024 |
| 7CBD Health Limited | Other services | 2019 |
| 91 Highbury Hill Management Company Limited | Professional & scientific | 2000 |
| A & T Electrical Services Limited | Construction | 2006 |
| A & T Medical Solutions Limited | Extraterritorial | 2013 |
| A a B Communication Limited | Wholesale & retail | 2016 |
| A and J Lilley Limited | Manufacturing | 2003 |
| A Bakes Consultancy Limited | Water & waste | 2024 |
| A D a Estimating Limited | Other services | 2010 |
| A Dodd Electrical Ltd | Construction | 2021 |
| A E Jointing Contractor Ltd | Construction | 2024 |
| A G-O Translations Limited | Professional & scientific | 2002 |
| A Gray Estates Limited | Administrative & support | 2026 |
| A J W Decorating Limited | Construction | 2022 |
| A P Hair & Beauty Limited | Other services | 2017 |
| A R B Property Services Ltd | Real estate | 1986 |
| A R E Plumbing & Heating Limited | Construction | 2009 |
| A R Price New Build Ltd | Construction | 2016 |
| A Rated Conservatories Ltd | Construction | 2014 |
| A S & G Reece Limited | Manufacturing | 2013 |
| A S Landscapes & Groundworks Ltd | Administrative & support | 2025 |
| A S R Financial Limited | Financial services | 2023 |
| A W Powis Limited | Construction | 2009 |
| A W S F Holdings Ltd | Financial services | 2025 |
| A&J2025 Ltd | Hospitality | 2025 |
| A&S Reporting Ltd | Administrative & support | 2019 |
| A-Plast Ltd | Construction | 2020 |
| A. & R. Electronic Developments Limited | Manufacturing | 1991 |
| A. Aulton Decor Ltd | Construction | 2022 |
| A. W. Training Services Ltd | Other services | 2024 |
| A.A. Direct Refurb Limited | Construction | 2008 |
| A.A. Fire & Security Limited | Administrative & support | 2005 |
| A.B.D. Carpets Limited | Wholesale & retail | 1992 |
| A.D.D. Property Services Limited | Construction | 2020 |
| A.D.E Machining Services Limited | Professional & scientific | 2012 |
| A.D.L.Z. (Benussi) Limited | Professional & scientific | 2012 |
| A.I.D. Fuel Oils Limited | Wholesale & retail | 1979 |
| A.I.D. Partnership Limited | Extraterritorial | 2011 |
| A.J.B. Trees & Ground Care Limited | Administrative & support | 2021 |
| A.L Autos Mobile Mechanic Ltd | Wholesale & retail | 2025 |
| A.L.C Brickwork Limited | Construction | 2011 |
| A.S.H.L.E.Y. Building Maintenance Ltd | Administrative & support | 2023 |
| A.T.H. Plastering Limited | Construction | 2010 |
| A.T.P.Electronic Developments Limited | Manufacturing | 1986 |
| A1 Air Conditioning Ltd | Construction | 2020 |
| A1 Clutches Cannock (UK) Limited | Wholesale & retail | 2014 |
| A2B Coaching West Midlands Ltd | Education | 2024 |
| A5 Car and Commercials Limited | Wholesale & retail | 2020 |
| A5 Furnishings Ltd | Wholesale & retail | 2022 |
| AAV Smart Home Commercial Installations Limited | Information & communication | 2007 |
| Abbey Energy Limited | Energy | 2014 |
| Abbey Foods Limited | Agriculture & fishing | 2015 |
| Abbey Homes and Estates Limited | Real estate | 2007 |
| ABC Finance Limited | Financial services | 2000 |
| ABC Group Limited | Administrative & support | 2001 |
| ABC Insure Limited | Financial services | 2024 |
| ABC Leisure Limited | Arts & recreation | 2018 |
| ABC Removals (2018) Limited | Transport & logistics | 2018 |
| ABC Removals (Cannock) Limited | Transport & logistics | 2020 |
| Aberrant Group Limited | Hospitality | 2016 |
| Abfielder Ltd | Information & communication | 2024 |
| Abigail Michaela Ltd | Arts & recreation | 2021 |
| Ability Recruitment Solutions Group Limited | Administrative & support | 2022 |
| Above and Beyond Kicks Ltd | Wholesale & retail | 2026 |
| ABP Medical Limited | Other services | 2016 |
| Acanthus Holdings Limited | Professional & scientific | 2005 |
| Acanthus Press Limited | Manufacturing | 1990 |
| Access Covers Limited | Manufacturing | 2011 |
| Accountable Marketing Ltd | Information & communication | 2021 |
| Acculynx Plugins Ltd | Information & communication | 2024 |
| Ace Estate Agents & Lettings Limited | Real estate | 2025 |
| Ace of Harts Ltd | Wholesale & retail | 2023 |
| Ace Spark Ltd | Construction | 2025 |
| Ace Tree Management Limited | Other services | 2008 |
| Achieve Education Limited | Financial services | 2014 |