| Admirals Wood Community Management Company Limited | Households | 2009 |
| ADN Sealants Limited | Construction | 2021 |
| Adodo Ltd | Wholesale & retail | 2025 |
| Adorntradersuk Ltd | Wholesale & retail | 2026 |
| ADR Derby Ltd | Real estate | 2025 |
| ADR Management Services Limited | Professional & scientific | 2020 |
| ADR Trading Derby Limited | Other services | 2025 |
| Adrd Properties Limited | Real estate | 2020 |
| Adrian Mihai Faget Limited | Transport & logistics | 2025 |
| Adrian Mooy & Co Limited | Professional & scientific | 2006 |
| ADS Plumbing & Heating Ltd | Construction | 2009 |
| Adtrak Media Limited | Information & communication | 1997 |
| Adult Care Consultants Ltd | Professional & scientific | 2021 |
| Advance Construction Solutions Ltd | Construction | 2025 |
| Advanced Auto Bodywork and Welding Limited | Wholesale & retail | 2025 |
| Advanced Building Plastics Limited | Manufacturing | 2018 |
| Advanced Caravan Services Limited | Manufacturing | 2013 |
| Advanced Contractors Driveways and Roofing Limited | Administrative & support | 2019 |
| Advanced Expert Systems Limited | Information & communication | 1989 |
| Advanced Fusion Modelling Ltd | Professional & scientific | 2026 |
| Advanced Landscapes and Driveways Limited | Administrative & support | 2024 |
| Advanced Lawn Care Limited | Other services | 2009 |
| Advanced Pipe Inspection (UK) Ltd | Construction | 2009 |
| Advanced Pressure Testing Limited | Construction | 2013 |
| Advanced Properties (Midlands) Ltd | Construction | 2025 |
| Advanced Retail Co-Ordination Limited | Professional & scientific | 1996 |
| Advanced Titanium Forming Investments Limited | Financial services | 2023 |
| Advanced Windscreens Ltd | Wholesale & retail | 2006 |
| Adveka Holdings Ltd | Real estate | 2026 |
| Advensys Limited | Information & communication | 1997 |
| Adventure Dementia Alzheimer's and Depression CIC | Arts & recreation | 2024 |
| Adventus (Derby) Limited | Transport & logistics | 2019 |
| Adverra Studio Ltd | Professional & scientific | 2026 |
| Adviseris Ltd | Wholesale & retail | 2024 |
| Advisory and Evaluator Services Limited | Other services | 2025 |
| Advocacy Supported Living Ltd | Health & social care | 2025 |
| Adwa International Holdings Ltd | Financial services | 2020 |
| Adwa International Logistics Ltd | Transport & logistics | 2014 |
| ADZ Derby Limited | Transport & logistics | 2025 |
| AE Housing Ltd | Real estate | 2017 |
| AE Motor Group Ltd | Wholesale & retail | 2025 |
| Aefocus Limited | Professional & scientific | 2017 |
| AEG Construction Ltd | Construction | 2021 |
| AEG Energy Ltd | Construction | 2022 |
| Aegis Certification Services Ltd | Construction | 2017 |
| AER Estate Ltd | Real estate | 2024 |
| Aeroline Records Limited | Professional & scientific | 2012 |
| Aeroparts Limited | Transport & logistics | 2004 |
| Aeroserve (MSP) Limited | Other services | 2000 |
| Aeroserve Euro Limited | Other services | 2012 |
| Aerospace & Quality System Consultants Ltd | Administrative & support | 2013 |
| Aerospace Safety Education Limited | Education | 2024 |
| Aerosparx Limited | Arts & recreation | 2017 |
| Aeroweld Ltd | Transport & logistics | 1997 |
| AES Defence Limited | Information & communication | 2009 |
| AES Group (UK) Ltd | Information & communication | 2004 |
| AES Group Limited | Information & communication | 2008 |
| AES Medical Limited | Information & communication | 2009 |
| Aesthetica Skin Solutions, Ltd | Health & social care | 2022 |
| Aesthetics Doctors Limited | Health & social care | 2013 |
| Aesthetics INT- Beauty for ALL Ltd | Other services | 2024 |
| Aestone Construction Services Limited | Professional & scientific | 2025 |
| Aetherial Forge Industries Limited | Manufacturing | 2025 |
| AF Electrical & Mechanical Contractors Limited | Construction | 2021 |
| AF Mechanical Engineering Limited | Manufacturing | 2020 |
| Afeera Designers Ltd | Wholesale & retail | 2023 |
| Afera Limited | Wholesale & retail | 2016 |
| Afetrad Ltd | Real estate | 2019 |
| Affirm Accountants Midlands (UK) Ltd | Professional & scientific | 2020 |
| Affixarc Limited | Wholesale & retail | 2023 |
| Affluence Cars Limited | Wholesale & retail | 2017 |
| Affluence Financial Management Services Limited | Financial services | 2022 |
| Affordable Motor Group Ltd | Wholesale & retail | 2021 |
| AFG Auto Parts Centre Ltd | Wholesale & retail | 2019 |
| Afghan Darbar Restaurant Ltd | Hospitality | 2025 |
| Afghan Resturant and Catering House Limited | Hospitality | 2025 |
| Afghan Social Centre Ltd | Health & social care | 2023 |
| Afiyah Investments Ltd | Real estate | 2020 |
| Afore UK Ltd | Wholesale & retail | 2013 |
| AFR Accountancy Services Ltd | Professional & scientific | 2021 |
| Afram Vale Ltd | Agriculture & fishing | 2026 |
| Afri Care Recruitment Limited | Health & social care | 2025 |
| Afri-Women Circle CIC | Agriculture & fishing | 2025 |
| Afriagro Expo Ltd | Financial services | 2025 |
| African Environmental and Sustainability Consulting Limited | Professional & scientific | 2016 |
| African Village Foods Ltd | Wholesale & retail | 2026 |
| Afridi Brothers Ltd | Real estate | 2025 |
| Afrigos Lettings Ltd | Real estate | 2025 |
| Afrigos Limited | Wholesale & retail | 2025 |
| Afrimaids Limited | Wholesale & retail | 2012 |
| Afro Best of Best Haircuts Limited | Other services | 2022 |
| Afro Naija Caribbean Food Festival CIC | Hospitality | 2026 |
| Afro Online Dating and Entertainment Services Ltd | Administrative & support | 2025 |
| Afro Shop Emma Limited | Wholesale & retail | 2019 |
| Afro-Nigerian Food Festival Ltd | Administrative & support | 2025 |
| Afrofilms UK Ltd | Information & communication | 2024 |
| Afroque Events Ltd | Hospitality | 2026 |
| Afsar Contractors Ltd | Professional & scientific | 2019 |
| Afsar Khan Ltd | Wholesale & retail | 2024 |
| Afsha Healthcare Ltd | Health & social care | 2018 |