| A2Z Cars Derby Ltd | Transport & logistics | 2022 |
| A2Z Civils Ltd | Financial services | 2025 |
| A2Z Driving School Ltd | Education | 2025 |
| A2Z Talent Recruitment Ltd | Other services | 2025 |
| A3 Global Trade Ltd | Wholesale & retail | 2025 |
| A3B Limited | Transport & logistics | 2019 |
| A4 Accountant Limited | Professional & scientific | 2009 |
| A4EXR Property Ltd | Real estate | 2025 |
| A52 Cars Limited | Transport & logistics | 2019 |
| AA Accident Assist Limited | Financial services | 2022 |
| AA Cuts Ltd | Other services | 2025 |
| AA Derby Limited | Hospitality | 2025 |
| AA Drain Services Limited | Construction | 2025 |
| AA Flooring Services Ltd | Construction | 2021 |
| AA Food Safety Limited | Professional & scientific | 2024 |
| AA Green Electrical Services Ltd | Professional & scientific | 2024 |
| AA Logistics (Midlands) Ltd | Transport & logistics | 2021 |
| AA Plumbing & Heating Services Limited | Construction | 2009 |
| AA Trade Cars Limited | Wholesale & retail | 2021 |
| AA Traders Derby Limited | Wholesale & retail | 2021 |
| AA Used Cars (Derby) Limited | Wholesale & retail | 2026 |
| Aa&J Supporting Services Ltd | Administrative & support | 2021 |
| AAA Salads Limited | Wholesale & retail | 2015 |
| AAA Trans Ltd | Transport & logistics | 2025 |
| AAA UK Cars Limited | Wholesale & retail | 2024 |
| Aaa.Jj'Smotorhomehire Limited | Administrative & support | 2025 |
| Aadhvick Ltd | Real estate | 2018 |
| AAE Homes Limited | Financial services | 2022 |
| Aahana International Limited | Wholesale & retail | 2025 |
| Aahil Ltd | Wholesale & retail | 2024 |
| AAI Improvements Ltd | Construction | 2023 |
| Aain Ltd | Hospitality | 2025 |
| AAK Transport Ltd | Transport & logistics | 2021 |
| Aakwa Group Ltd | Professional & scientific | 2016 |
| Aama Car Wash Ltd | Administrative & support | 2025 |
| AAR Estates Ltd | Real estate | 2026 |
| Aardvark Business Consultancy Ltd | Professional & scientific | 2022 |
| Aardvark Education Consultancy Limited | Administrative & support | 2016 |
| Aarkay IT Solutions Limited | Information & communication | 2022 |
| Aarke Products Limited | Wholesale & retail | 2024 |
| Aaron & Alex Ltd | Health & social care | 2020 |
| Aaron Saccone Properties Ltd | Real estate | 2023 |
| Aaron Toombs Contracting Ltd | Professional & scientific | 2019 |
| Aarons Autos (Derby) Limited | Wholesale & retail | 2015 |
| Aarvi Management Ltd | Professional & scientific | 2023 |
| Aashu Ltd | Wholesale & retail | 2021 |
| Aaslc Global Ltd | Real estate | 2025 |
| Aathanya Convenience Store Ltd | Wholesale & retail | 2026 |
| Aavora Limited | Information & communication | 2025 |
| AB & TA Ltd | Health & social care | 2025 |
| AB Abaab Limited | Real estate | 2023 |
| AB Inspections Ltd | Professional & scientific | 2025 |
| AB Models Ltd | Manufacturing | 2007 |
| AB Paint Spraying Limited | Manufacturing | 2019 |
| AB Road Ltd | Transport & logistics | 2017 |
| AB Sports Analytics Ltd | Arts & recreation | 2021 |
| Ab-Laser Ltd | Administrative & support | 2024 |
| Abacos Design Co-Operative Limited | Real estate | 1996 |
| Abacus Apartments Ltd | Construction | 2019 |
| Abacus Electric Limited | Construction | 2018 |
| Abacus Property Construct Ltd | Construction | 2024 |
| Abacus Property Group Ltd | Real estate | 2019 |
| Abacus Property Holdings Ltd | Real estate | 2020 |
| Abacus Property Network Ltd | Real estate | 2021 |
| Abacus Property Services Ltd | Real estate | 2025 |
| Abayaati Limited | Wholesale & retail | 2025 |
| Abbas Optical Limited | Health & social care | 2014 |
| Abbey Architectural Derby Ltd | Extraterritorial | 2010 |
| Abbey Brass Company Limited | Wholesale & retail | 2003 |
| Abbey Court Car Sales Ltd | Wholesale & retail | 2012 |
| Abbey GAS Services (Derby) Ltd | Construction | 2004 |
| Abbey Glass (Derby) Limited | Construction | 1995 |
| Abbey House Property Investments Limited | Real estate | 2021 |
| Abbey Lane Studios (Derby) Ltd | Arts & recreation | 2020 |
| Abbey Street Garage Limited | Real estate | 2009 |
| Abbeycroft (Darley Abbey) Management Company Limited | Real estate | 2009 |
| Abbeydale Court (Derby) Management Co Limited | Real estate | 2001 |
| Abbeyexec Ltd | Transport & logistics | 2017 |
| Abbeystone Paving Limited | Construction | 2018 |
| Abbeywood Landscape & Building Supplies Limited | Professional & scientific | 2005 |
| Abbot Solutions Limited | Information & communication | 2008 |
| Abbott M D a Ltd | Professional & scientific | 2005 |
| Abbotts Place (Ashbourne) Management Company Limited | Households | 2008 |
| Abby Lever Ltd | Administrative & support | 2022 |
| Abby Sillah Hair & Beauty Limited | Other services | 2025 |
| Abby Sillah Hair Limited | Other services | 2022 |
| Abbystore Ltd | Wholesale & retail | 2025 |
| ABC - a BIN Cleaned Ltd | Administrative & support | 2019 |
| ABC BIN Cleaning Ltd | Administrative & support | 2020 |
| ABC Mediation Ltd | Real estate | 2025 |
| Abco Derby Limited | Wholesale & retail | 1990 |
| Abdoulaye Transport Company 2908 Ltd | Transport & logistics | 2025 |
| Abdul Properties Ltd | Real estate | 2023 |
| Abdullah and Sons Ltd | Wholesale & retail | 2022 |
| Abee Consultancy Ltd | Administrative & support | 2019 |
| Abel I.T. Limited | Information & communication | 1996 |
| Aben Interiors & Projects Limited | Professional & scientific | 2021 |
| Aben Living Limited | Real estate | 2017 |
| Abeo Group Limited | Construction | 2022 |
| Abeocity Limited | Health & social care | 2013 |