| Altie Ltd | Wholesale & retail | 2024 |
| Altin Court Management Limited | Households | 2015 |
| Altin Homes Limited | Construction | 2005 |
| Altitude Holdco Limited | Financial services | 2026 |
| Altius Healthcare Bury Ltd | Health & social care | 2022 |
| Altius Healthcare Ltd | Health & social care | 2015 |
| Altocode Ltd | Information & communication | 2020 |
| Altos Labs UK Limited | Professional & scientific | 2021 |
| Altrincham & District Athletic Club Limited | Arts & recreation | 2015 |
| Altrincham & District Festival CIC | Other services | 2017 |
| Altrincham & Hale Muslim Association | Other services | 2003 |
| Altrincham Aerial Arts Ltd | Health & social care | 2025 |
| Altrincham Association Football Club,Limited | Arts & recreation | 1921 |
| Altrincham Autos Limited | Wholesale & retail | 2017 |
| Altrincham Autotecnic Centre Limited | Wholesale & retail | 1994 |
| Altrincham BID Limited | Other services | 2016 |
| Altrincham Business Change Limited | Professional & scientific | 2017 |
| Altrincham Canadian Charcoal Grill Ltd | Hospitality | 2025 |
| Altrincham Catering Limited | Hospitality | 2016 |
| Altrincham Children's Community Care CIC | Health & social care | 2025 |
| Altrincham Children’S Care Limited | Health & social care | 2025 |
| Altrincham Community Media CIC | Information & communication | 2020 |
| Altrincham Community Orchard C.I.C. | Agriculture & fishing | 2025 |
| Altrincham Dent Limited | Health & social care | 2019 |
| Altrincham Escape Ltd | Arts & recreation | 2024 |
| Altrincham Finance Limited | Professional & scientific | 2017 |
| Altrincham Floor Studio Limited | Wholesale & retail | 2017 |
| Altrincham Flooring Limited | Extraterritorial | 2022 |
| Altrincham Football Club Community Sports Limited | Arts & recreation | 2012 |
| Altrincham Garrick Society Limited | Arts & recreation | 1994 |
| Altrincham Glass Company Limited | Manufacturing | 1975 |
| Altrincham Hairdressing Limited | Other services | 2015 |
| Altrincham Healthcare Alliance Primary Care Network Ltd | Health & social care | 2022 |
| Altrincham Holdings Ltd | Professional & scientific | 2021 |
| Altrincham Home Limited | Financial services | 2019 |
| Altrincham Home Solutions Limited | Manufacturing | 2019 |
| Altrincham in Bloom C.I.C. | Professional & scientific | 2017 |
| Altrincham Interiors Ltd | Professional & scientific | 2021 |
| Altrincham Joinery Limited | Construction | 2014 |
| Altrincham Plumbing and Heating Ltd | Construction | 2021 |
| Altrincham Preparatory School Limited | Education | 1936 |
| Altrincham Rehabilitation Limited | Health & social care | 2015 |
| Altrincham Removals Limited | Transport & logistics | 2002 |
| Altrincham Roofing Contractors Ltd | Construction | 2024 |
| Altrincham Skip Hire Limited | Water & waste | 2015 |
| Altrincham Storage Ltd | Transport & logistics | 2024 |
| Altrincham Town Centre Partnership Limited | Other services | 2013 |
| Altrincham Treasure Limited | Financial services | 2026 |
| Altrincham Tutorials Limited | Education | 2015 |
| Altrincham Ultrasound & Imaging Limited | Health & social care | 2024 |
| Altrincham Ventures Limited | Hospitality | 2017 |
| Altrincham-Air Ltd | Energy | 2024 |
| Altura Estates Ltd | Real estate | 2025 |
| Alty Local Ltd | Wholesale & retail | 2025 |
| Alty Studio Ltd | Information & communication | 2025 |
| Alty Sweet Buzz Limited | Hospitality | 2025 |
| Altéo Equestrian Ltd | Wholesale & retail | 2023 |
| Aluprof UK Limited | Wholesale & retail | 2006 |
| Alveni Enterprises Ltd | Information & communication | 2013 |
| Alveus Legal Limited | Professional & scientific | 2023 |
| Alvon Court (Freehold) Limited | Households | 2018 |
| AM Autos Commercial Servicing and Repairs Limited | Wholesale & retail | 2018 |
| AM Capital Partners Ltd | Professional & scientific | 2023 |
| AM FD1 Limited | Real estate | 2025 |
| AM91 Ltd | Health & social care | 2024 |
| AMA Aviation Consulting Limited | Professional & scientific | 2020 |
| Amaanalux Limited | Other services | 2022 |
| Amaco Nexus Ltd | Wholesale & retail | 2014 |
| Amadeus Fitness Limited | Arts & recreation | 2024 |
| Amadys UK Limited | Financial services | 2020 |
| Amae Electrical Services Ltd | Energy | 2015 |
| Amal’S Choice Limited | Wholesale & retail | 2025 |
| Amanda Idowu Limited | Professional & scientific | 2018 |
| Amanz Ltd | Wholesale & retail | 2024 |
| Amax Consultancy Ltd | Professional & scientific | 2019 |
| Amax Group Limited | Real estate | 2019 |
| Amazing Offerings Ltd | Wholesale & retail | 2023 |
| Amazing Stars Ltd | Health & social care | 2024 |
| Amazon House Properties Limited | Real estate | 1997 |
| Ambassador Place Management Limited | Real estate | 1988 |
| Ambers Attic Limited | Education | 2002 |
| Ambiflex Limited | Construction | 1988 |
| Ambrose Court (Residents) Management Co Limited | Real estate | 2004 |
| AMC 2020 Limited | Hospitality | 2020 |
| AMC JRC Ltd | Real estate | 2022 |
| Amcap (Stockport) Limited | Construction | 2020 |
| Ameco Solutions Limited | Professional & scientific | 2022 |
| Ameliorate Skincare Limited | Extraterritorial | 1997 |
| Amelnix Developments Ltd | Real estate | 2024 |
| Amerge Ltd | Professional & scientific | 2019 |
| Amethyst Virtual Accounts Ltd | Professional & scientific | 2021 |
| Ameveo Limited | Information & communication | 2022 |
| AMG Consultancy Limited | Information & communication | 1998 |
| AMH (Altrincham) Limited | Professional & scientific | 2015 |
| Amildham | Education | 2017 |
| Amino IT Limited | Administrative & support | 2014 |
| AMJ Pneumatics '99' Ltd | Administrative & support | 1999 |
| AML Rightsource Limited | Information & communication | 2025 |
| Amlgs Investments Ltd | Real estate | 2022 |
| Amlrs UK Acquireco Limited | Financial services | 2021 |