| . . . a Trouble Halved Limited | Professional & scientific | 1999 |
| 10 Conwy Street Limited | Real estate | 2012 |
| 128 Builds Limited | Construction | 2025 |
| 12TH MAN Interim Solutions Ltd | Professional & scientific | 2010 |
| 12TH MAN Strategic Consulting LLP | | 2018 |
| 136 Drakefell Road Limited | Households | 2017 |
| 15 Bridge Street RTM Company Limited | Households | 2024 |
| 1636 Limited | Real estate | 2022 |
| 17NGON Limited | Hospitality | 2021 |
| 19 DH Investments Limited | Real estate | 2025 |
| 19 Queen Street (Droitwich) Management Company Limited | Real estate | 2009 |
| 19 Ribbons Ltd | Construction | 2019 |
| 1ST Choice Metals Ltd | Wholesale & retail | 2016 |
| 2GUK Limited | Administrative & support | 2017 |
| 3 Links Property Solution Limited | Households | 2018 |
| 30THOUSANDFEET Limited | Administrative & support | 2019 |
| 348 Holdings Limited | Financial services | 2026 |
| 360 Degree Manager Limited | Administrative & support | 2019 |
| 3C Health LLP | | 2010 |
| 3D SKN Ltd | Other services | 2026 |
| 3JSS Limited | Administrative & support | 2017 |
| 3RUK Ltd | Water & waste | 2017 |
| 3Z Anaesthesia Ltd | Health & social care | 2025 |
| 4 X 4 Development Limited | Wholesale & retail | 2013 |
| 4C Property Management Limited | Real estate | 2021 |
| 4C Sports Ltd | Professional & scientific | 2025 |
| 5FOUR Motorcycles Limited | Manufacturing | 2018 |
| 5S Technologies Ltd | Information & communication | 1994 |
| 614 Medical Services Limited | Health & social care | 2023 |
| 72 Lonsdale Road Limited | Real estate | 2001 |
| 84 London Road Limited | Real estate | 2024 |
| 86 Blackpole Trading Estate Limited | Construction | 2004 |
| 9 Months Limited | Education | 2000 |
| 99 Seconds Media Limited | Information & communication | 2002 |
| 9RB Limited | Households | 2016 |
| A & G Engineering Services Limited | Administrative & support | 2006 |
| A & S Land Holdings Limited | Administrative & support | 2017 |
| A B Plumbing Limited | Construction | 2003 |
| A B Ventures (Fmcg) Ltd | Professional & scientific | 2024 |
| A H Plastering & Rendering Ltd | Construction | 2022 |
| A L Williams Construction Limited | Construction | 2002 |
| A Lloyd Consulting Services Ltd | Administrative & support | 2022 |
| A NG EYE Surgery Ltd | Health & social care | 2019 |
| A Stellar Future Limited | Administrative & support | 2020 |
| A&N Investors Limited | Real estate | 2018 |
| A&N Transforming Lives Limited | Hospitality | 2019 |
| A. & H. Wylie Limited | Agriculture & fishing | 1965 |
| A.E. LEE Recruitment Limited | Administrative & support | 2010 |
| A.P. Hodgetts Limited | Transport & logistics | 2002 |
| A.P.D. Alarms Limited | Professional & scientific | 2019 |
| A.S.W. Ventures Limited | Administrative & support | 2021 |
| A2P Logistics Ltd | Transport & logistics | 2024 |
| A610 Limited | Wholesale & retail | 2022 |
| AA Salt Holdings Limited | Construction | 1999 |
| AAL Productions Ltd | Arts & recreation | 2023 |
| Aaps Holdings Ltd | Financial services | 2025 |
| Aardvark Design Group Limited | Financial services | 2015 |
| AB Hvac Limited | Construction | 2024 |
| Abbots Hendra Barns Company Limited | Households | 2021 |
| ABC BIO Limited | Health & social care | 2021 |
| Abcab CNC Solutions Ltd | Manufacturing | 2021 |
| Aberdair Ltd | Financial services | 2021 |
| ABH Asset Services Ltd | Water & waste | 2014 |
| Abraxas Catering Equipment Limited | Manufacturing | 2007 |
| Abroadly Ltd | Wholesale & retail | 2023 |
| Access & Vision (Midlands) Limited | Administrative & support | 2012 |
| Access Educational Provision Limited | Education | 2022 |
| Accessories by Teddy Ltd | Extraterritorial | 2025 |
| Accountancy 1 Limited | Administrative & support | 2023 |
| Accountancy 4 Limited | Financial services | 2026 |
| Ace Driver Hire Ltd | Transport & logistics | 2023 |
| ACL (Worcester) Ltd | Administrative & support | 2017 |
| Acorn North Ltd | Real estate | 2021 |
| ACT Two MT Ltd | Arts & recreation | 2026 |
| Actionblast Ltd | Construction | 2016 |
| Active Practical Love Initiative CIC | Health & social care | 2023 |
| Adam Fletcher Associates Limited | Administrative & support | 2001 |
| Adam Malachowski Ltd | Transport & logistics | 2023 |
| Addis Farm Holdings Limited | Financial services | 2022 |
| Addis Farms Limited | Agriculture & fishing | 1945 |
| Adept PHB Limited | Administrative & support | 2006 |
| ADH Diagnostics Ltd | Health & social care | 2018 |
| Adhd Foundation | Education | 2005 |
| Adler Recruitment Group Limited | Professional & scientific | 2010 |
| Adore Decore Ltd | Hospitality | 2022 |
| Adrianne Company Limited | Health & social care | 2016 |
| Adroit Accountants and Contracts Ltd | Professional & scientific | 2013 |
| Adstone Construction Group Ltd | Construction | 2019 |
| Adstone Construction Limited | Construction | 1977 |
| Adstone Steel Construction Limited | Financial services | 2025 |
| Advaitha Limited | Information & communication | 2024 |
| Advanced Internals Ltd | Construction | 2021 |
| Advanced Mobile Power Systems Limited | Manufacturing | 2017 |
| Advantis Services Limited | Professional & scientific | 1999 |
| Aerocoach Ltd | Arts & recreation | 2012 |
| AG Animal Services Limited | Professional & scientific | 2021 |
| Agam Invest Ltd | Real estate | 2025 |
| Agatom Property Maintenance Limited | Construction | 2025 |
| Agatom Property Solutions Ltd | Real estate | 2024 |
| AGR Engineering Ltd | Professional & scientific | 2025 |