| Alpe Consulting Ltd | Information & communication | 2023 |
| Alpelex Ltd | Professional & scientific | 2025 |
| Alpetna Developments Ltd | Real estate | 2023 |
| Alpha Asia-Europe Limited | Wholesale & retail | 2022 |
| Alpha Barber Shop Ltd | Other services | 2026 |
| Alpha Beat Limited | Information & communication | 2023 |
| Alpha Bravo Delta Holdings Limited | Financial services | 2020 |
| Alpha Civils & Groundworks Ltd | Construction | 2022 |
| Alpha Consulting Recruitment Limited | Administrative & support | 2001 |
| Alpha Cybernetics UK Ltd | Professional & scientific | 2025 |
| Alpha Driving School Ltd | Education | 2023 |
| Alpha E Construction Ltd | Construction | 2025 |
| Alpha Education Community Trust C.I.C. | Education | 2011 |
| Alpha Education Supplies Ltd | Wholesale & retail | 2008 |
| Alpha Electric Services Limited | Construction | 2018 |
| Alpha Epsilon Holdings Ltd | Real estate | 2024 |
| Alpha Estates Limited | Real estate | 2005 |
| Alpha Flooring (Nottingham) Limited | Construction | 2011 |
| Alpha Flooring Services Ltd | Construction | 2026 |
| Alpha Industries Welding Services Ltd | Construction | 2022 |
| Alpha Kindergarten (Fletton) Limited | Health & social care | 1997 |
| Alpha Kindergarten Group Limited | Administrative & support | 2004 |
| Alpha Kindergarten Stanground Limited | Health & social care | 2018 |
| Alpha Lift Services Ltd | Administrative & support | 2016 |
| Alpha Palace Limited | Wholesale & retail | 2018 |
| Alpha Property Specialists Ltd | Construction | 2017 |
| Alpha Scores Training Ltd | Education | 2023 |
| Alpha Services NW Ltd | Transport & logistics | 2025 |
| Alpha Specialist Surveys Ltd | Professional & scientific | 2018 |
| Alpha Squared Properties Ltd | Real estate | 2025 |
| Alphab Nottingham Limited | Other services | 2013 |
| Alphavin UK Ltd | Health & social care | 2022 |
| Alpi Investment Ltd | Wholesale & retail | 2024 |
| Alpine (East Midlands) Limited | Construction | 2004 |
| Alpine Atlantic Ltd | Financial services | 2025 |
| Alpine Chauffeurs Ltd | Transport & logistics | 2021 |
| Alpine Development Ltd | Real estate | 2022 |
| Alpine Flourish Property Limited | Households | 2021 |
| Alpine Investment Holdings Ltd | Real estate | 2026 |
| Alpine Investments Group Ltd | Real estate | 2021 |
| Alpine Together Ltd | Financial services | 2024 |
| Alpine Vehicle Services Limited | Transport & logistics | 2023 |
| Alpkit Group Ltd | Wholesale & retail | 2026 |
| Alpro Consultancy Ltd | Administrative & support | 2016 |
| Alpro Products Ltd | Wholesale & retail | 2016 |
| Alramko Limited | Health & social care | 2016 |
| ALS Decorators Ltd | Construction | 2024 |
| ALS Property Limited | Real estate | 2018 |
| Alshameri Builders Limited | Construction | 2025 |
| Alsheikh Ltd | Wholesale & retail | 2018 |
| Alshikh Property Investment Ltd | Real estate | 2025 |
| Alsirius Ltd | Wholesale & retail | 2025 |
| Alsop Limited | Hospitality | 2017 |
| ALT Athletic Ltd | Wholesale & retail | 2021 |
| ALT Nottingham Ltd | Education | 2025 |
| Altach Limited | Health & social care | 2024 |
| Altaf Aesthetics Ltd | Other services | 2025 |
| Altar EGO Ltd | Health & social care | 2023 |
| Alter GM Ltd | Construction | 2019 |
| Altera Projects Ltd | Professional & scientific | 2025 |
| Alterations Studio Limited | Other services | 2014 |
| Altered Images (Decorators) Limited | Construction | 2016 |
| Altered Performance Ltd | Wholesale & retail | 2023 |
| Alternative Acres Ltd | Education | 2025 |
| Alternative Inspirational Health Ltd | Education | 2018 |
| Alternative Living Solutions Ltd | Water & waste | 2025 |
| Alternative Planning Company Limited | Other services | 2013 |
| Alternative Transport Solutions Ltd | Transport & logistics | 2021 |
| Althea Tomlin Skincare Limited | Wholesale & retail | 2010 |
| Altheus Engineering Ltd | Professional & scientific | 2022 |
| Althproperties Limited | Real estate | 2017 |
| Altia-Abm Group Limited | Extraterritorial | 2017 |
| Altitude (Hucknall) Limited | Education | 2015 |
| Altitude Audio Visual Ltd | Administrative & support | 2010 |
| Altitude Enterprises Ltd | Real estate | 2017 |
| Altitude Financial Solutions Limited | Financial services | 2025 |
| Altling Ltd | Information & communication | 2019 |
| Alto Projects Limited | Construction | 2026 |
| Altogether Entertainment Limited | Arts & recreation | 2024 |
| Alton Electrical Services (Commercial) Limited | Administrative & support | 2010 |
| Altum Residential Care Ltd | Health & social care | 2012 |
| Altum Resources Ltd | Administrative & support | 2015 |
| Altuscore Limited | Information & communication | 2025 |
| Alufathia Ltd | Construction | 2020 |
| Aluminate Limited | Manufacturing | 2013 |
| Alura Care Ltd | Public administration | 2026 |
| Alvey Holdings Limited | Real estate | 2025 |
| Alvin LEE Limited | Information & communication | 1970 |
| ALW Construction Ltd | Construction | 2020 |
| Always 13 Ltd | Wholesale & retail | 2025 |
| Always N Forever Ltd | Wholesale & retail | 2025 |
| Alwaysmorespace Ltd | Construction | 2025 |
| ALY & DAW Trans Ltd | Transport & logistics | 2018 |
| Alysium Consulting Services Limited | Administrative & support | 2026 |
| Alytus Midco Limited | Financial services | 2024 |
| Alzac Properties Limited | Real estate | 2018 |
| AM Cameron Ltd | Real estate | 2025 |
| AM Environmental Consulting Limited | Professional & scientific | 2020 |
| AM Health Advisory Ltd | Professional & scientific | 2026 |
| AM Law Solicitors Ltd | Professional & scientific | 2012 |