| Adept Drywall Finishing Ltd | Construction | 2022 |
| Adept Engineering Management Limited | Professional & scientific | 2023 |
| Adept MEZZA9 Ltd | Construction | 2015 |
| Adetexs Ltd | Professional & scientific | 2015 |
| Adetutu Enterprises Ltd | Information & communication | 2022 |
| Adfinito Limited | Information & communication | 2017 |
| ADG Creatives LAB Ltd | Professional & scientific | 2023 |
| ADG Property Investments (Nottingham) Ltd | Real estate | 2022 |
| Adgnitio Consulting Ltd | Professional & scientific | 2025 |
| ADI Rescue Ltd | Administrative & support | 2024 |
| Adi-Mex Decorating Ltd | Construction | 2018 |
| Adifestklean Ltd | Administrative & support | 2026 |
| Adil Cutz Ltd | Other services | 2025 |
| Adil Indians Ltd | Hospitality | 2025 |
| Adina Consulting Ltd | Information & communication | 2019 |
| Adines Group Ltd | Construction | 2026 |
| Adioris Ltd | Information & communication | 2025 |
| Adira Care Ltd | Health & social care | 2019 |
| Aditya Diagnostics and Artificial Intelligence PVT Limited | Health & social care | 2024 |
| Aditya Property Limited | Real estate | 2024 |
| Adiyukta Private Ltd | Wholesale & retail | 2024 |
| Adjust Clinics Ltd | Health & social care | 2021 |
| ADK Drains Ltd | Water & waste | 2018 |
| Adk's Shopfitting UK Ltd | Construction | 2019 |
| Adkins Bakery Limited | Manufacturing | 2001 |
| ADL Express Ltd | Transport & logistics | 2024 |
| ADL Joinery Ltd | Manufacturing | 2019 |
| ADL Living Ltd | Real estate | 2026 |
| ADL Search Ltd | Professional & scientific | 2026 |
| Adlaoui Ltd | Wholesale & retail | 2025 |
| Adlard Print & Reprographics Limited | Manufacturing | 1998 |
| Adler Learning UK Ltd | Professional & scientific | 2010 |
| Adlins Limited | Administrative & support | 2022 |
| Adlu Properties Limited | Real estate | 2021 |
| ADM Breedon Properties Limited | Real estate | 2022 |
| ADM Homes Ltd | Real estate | 2024 |
| ADM Mason Investments Limited | Real estate | 2024 |
| Admek Ltd | Health & social care | 2019 |
| Admicra IT Services Limited | Other services | 2011 |
| Admicra IT Systems Limited | Wholesale & retail | 2011 |
| Adminsoft Limited | Information & communication | 1998 |
| Admiral General Trading Ltd | Manufacturing | 2022 |
| Adnan Global Trades Ltd | Wholesale & retail | 2025 |
| Adnan Sweets Limited | Hospitality | 2023 |
| Adnc Holdings Limited | Hospitality | 2019 |
| Adobencha Ltd | Real estate | 2025 |
| Adodo Consultancy Services Limited | Information & communication | 2007 |
| Adoltis Limited | Information & communication | 2003 |
| Adombi Ltd | Health & social care | 2023 |
| Adonaifields Development Ltd | Construction | 2022 |
| Adonaifields Limited | Real estate | 2016 |
| Adonaifields Properties Ltd | Real estate | 2018 |
| Adonaifields Shopngadgets Ltd | Wholesale & retail | 2022 |
| Adonext Limited | Information & communication | 2016 |
| Adora Foundation Ltd | Education | 2012 |
| Ados Professionals Ltd | Professional & scientific | 2023 |
| Adox Research Limited | Professional & scientific | 2018 |
| Adox Travel Limited | Administrative & support | 2019 |
| ADP Electrical Engineering Services Limited | Construction | 2003 |
| ADR Homes (Nottingham) Ltd | Real estate | 2018 |
| ADR Lifts Ltd | Manufacturing | 2022 |
| Adrenal Media Limited | Information & communication | 2023 |
| Adrian Furlonger Consulting Limited | Information & communication | 2022 |
| Adriano Build Limited | Construction | 2025 |
| Ads-Aztec Ltd | Information & communication | 2018 |
| Adsajama Aviation Services Limited | Transport & logistics | 2021 |
| Adsakut Ltd | Health & social care | 2022 |
| Adss Consultancy Limited | Professional & scientific | 2025 |
| Adston Capital Ltd | Real estate | 2021 |
| Adston Group Ltd | Real estate | 2017 |
| Aduanaba Company Ltd | Health & social care | 2020 |
| Aduni Concept Ltd | Construction | 2020 |
| Aduni Limited | Hospitality | 2025 |
| ADV 001 Limited | Energy | 2019 |
| Advance AC Mechanical Ltd | Energy | 2024 |
| Advance Air Conditioning Ltd | Energy | 2015 |
| Advance Auto Recovery Holdings Limited | Financial services | 2026 |
| Advance Dental Suite Limited | Health & social care | 2017 |
| Advance EPA Ltd | Education | 2023 |
| Advance Grass Solutions Ltd | Arts & recreation | 2017 |
| Advance Health Care UK Ltd | Health & social care | 2008 |
| Advance Management and Consultancy Services Ltd | Transport & logistics | 2026 |
| Advance Nottingham (Trading) Ltd | Real estate | 2007 |
| Advance Nottingham Ltd | Real estate | 2001 |
| Advance Tool Hire & Sales Limited | Administrative & support | 1997 |
| Advanced Access Solutions Midlands Ltd | Manufacturing | 2017 |
| Advanced Circuit Repairs Limited | Other services | 2013 |
| Advanced Commercial Interiors Holdings Ltd | Financial services | 2025 |
| Advanced Commercial Interiors Limited | Construction | 2009 |
| Advanced Cosmetic Academy Ltd | Education | 2020 |
| Advanced Craft Joinery Limited | Manufacturing | 2003 |
| Advanced Designs Ltd | Professional & scientific | 2026 |
| Advanced Designs Sheetmetal Fabrications Ltd | Professional & scientific | 2014 |
| Advanced Diagnostic Group Ltd | Manufacturing | 2016 |
| Advanced Healthcare Products Ltd | Wholesale & retail | 2013 |
| Advanced Imaging (Nottingham) Limited | Extraterritorial | 1996 |
| Advanced Informatics Ltd | Information & communication | 2018 |
| Advanced IT Services Nottingham Ltd | Information & communication | 2000 |
| Advanced Metal Innovation Co Ltd | Water & waste | 2009 |
| Advanced Metalworks Limited | Manufacturing | 2018 |