| 02229539 PLC | Arts & recreation | 1988 |
| 1 Oak Coffee Limited | Arts & recreation | 2016 |
| 1 Oak Investment Group Ltd | Financial services | 2021 |
| 1 Oak Investments Ltd | Real estate | 2021 |
| 1 Oak Limited | Hospitality | 2013 |
| 1 Oak Restaurants Ltd | Hospitality | 2021 |
| 103 Bedford Hill Lessees Limited | Real estate | 2002 |
| 1MB Cabling Solutions Limited | Construction | 2008 |
| 21-26 Churchill Road RTM Company Limited | Households | 2017 |
| 247UTILITYCONNECTIONS Ltd | Energy | 2024 |
| 2ND City GAS Plumbing and Heating Services Limited | Construction | 2011 |
| 2Q Investor Limited | Real estate | 2021 |
| 3 Bros Halal Poultry Ltd | Wholesale & retail | 2024 |
| 3 Willow Works Ltd | Construction | 2026 |
| 35 Portland Road Management Limited | Households | 2005 |
| 360 Ltd | Water & waste | 2016 |
| 3D Design for YOU Ltd | Wholesale & retail | 2019 |
| 3H Quick Stop Ltd | Wholesale & retail | 2024 |
| 3RS Property Development Ltd | Construction | 2023 |
| 3WIND Ltd | Manufacturing | 2021 |
| 4 Ashes Property Holdings Limited | Financial services | 2021 |
| 4 Oaks DRY Cleaning Ltd | Other services | 2025 |
| 4G Properties Limited | Real estate | 2013 |
| 4H Property Ltd | Real estate | 2025 |
| 4HOTO Memories Limited | Professional & scientific | 2015 |
| 4MG Fitness Ltd | Arts & recreation | 2025 |
| 4RC Property Limited | Real estate | 2022 |
| 4RCENVIRONMENTAL Limited | Water & waste | 2015 |
| 4WARD Property Solutions Limited | Administrative & support | 2011 |
| 65BIT Software Limited | Information & communication | 2003 |
| 7 Layer Networks Limited | Information & communication | 2015 |
| 70X7 Accountancy Limited | Professional & scientific | 2019 |
| 7GALAXY Services Ltd | Construction | 2026 |
| 8 York Road Edgbaston Management Limited | Real estate | 2001 |
| A & a Developments (Sutton) Limited | Real estate | 2017 |
| A & a Lodge Holdings Ltd | Financial services | 2022 |
| A & B Richardson Engineering Limited | Manufacturing | 2006 |
| A & H Castle Holdings Ltd | Financial services | 2022 |
| A & H Gate Maintenance Ltd | Manufacturing | 2024 |
| A & J Dental Prosthetics Ltd | Manufacturing | 2017 |
| A & S P Services Limited | Professional & scientific | 2017 |
| A 2 Z Developments (Birmingham) Limited | Hospitality | 1990 |
| A a Tamas Ltd | Transport & logistics | 2015 |
| A B Plant & Transport Ltd | Administrative & support | 2016 |
| A C Buck Limited | Administrative & support | 2023 |
| A Clean Mind Ltd | Administrative & support | 2025 |
| A H Services Limited | Information & communication | 2003 |
| A J Seedhouse Limited | Real estate | 2018 |
| A K Grillers Limited | Hospitality | 2023 |
| A M Electrical Installations Limited | Construction | 2016 |
| A M Investment Property Limited | Real estate | 2026 |
| A Nicholls Contracts Ltd | Construction | 2025 |
| A R Cooley Limited | Health & social care | 2008 |
| A Safi Vans Ltd | Wholesale & retail | 2024 |
| A Thompson Property Services Limited | Construction | 2006 |
| A V Design Systems Limited | Construction | 2010 |
| A W Roofing Services Ltd | Construction | 2018 |
| A&A Clean Ltd | Administrative & support | 2025 |
| A&E Aesthetics Limited | Other services | 2025 |
| A&F Flex Services Ltd | Hospitality | 2026 |
| A&H Construction & Developments (Holdings) Limited | Professional & scientific | 1998 |
| A&J Installations Limited | Construction | 2018 |
| A&P Carpentry & Building Services Limited | Construction | 2004 |
| A&S HOMES4YOU Limited | Real estate | 2024 |
| A&S IT Solutions Ltd | Information & communication | 2014 |
| A&S Travel Limited | Transport & logistics | 2020 |
| A. Nicholls Enterprises Ltd | Real estate | 2016 |
| A. S. Bains Property Limited | Real estate | 2021 |
| A.B.A Cranes Limited | Administrative & support | 2007 |
| A.E.B. Builders Limited | Construction | 2023 |
| A.E.M. (Carbon Products) Limited | Professional & scientific | 1983 |
| A.F. Shaw Precision Grinding Limited | Extraterritorial | 1986 |
| AAM TM Ltd | Construction | 2024 |
| Aapm Ltd | Information & communication | 2014 |
| Aartech Solonics UK Limited | Manufacturing | 2023 |
| AB Resourcing Limited | Administrative & support | 2020 |
| ABA Crane Hire Limited | Administrative & support | 1988 |
| ABA Lifting Gear Limited | Administrative & support | 2009 |
| Abasi Consulting Limited | Health & social care | 2008 |
| Abasiubong Property Investment Ltd | Real estate | 2025 |
| ABB Coachcraft Limited | Wholesale & retail | 2008 |
| Abbey Associates Vehicle Solutions Limited | Administrative & support | 2010 |
| Abbey Joinery Solutions Limited | Construction | 2018 |
| Abbey Solar Renewables Limited | Energy | 2013 |
| Abbeyfields Services West Midlands Ltd | Financial services | 2011 |
| Abbott Landscapes Ltd | Information & communication | 2007 |
| Abdoon Ltd. | Health & social care | 2013 |
| Abdul Bagail Ltd | Construction | 2025 |
| Abdullah TM Ltd | Construction | 2022 |
| ABM Properties Ltd | Real estate | 2020 |
| About Dance Ltd | Extraterritorial | 2014 |
| Abpb Consulting Ltd | Health & social care | 2019 |
| Abraham Construction Ltd | Construction | 2024 |
| Absolute Plumbing-Heating Solutions Ltd | Construction | 2017 |
| Absumus Limited | Real estate | 1982 |
| Abzy Ltd | Construction | 2024 |
| AC & HS Facilities Limited | Construction | 2007 |
| AC & HS Group Limited | Construction | 2017 |
| Accepting Behaviour Limited | Education | 2022 |
| Access Consultancy Ltd | Professional & scientific | 2000 |