| ALI Spice Norwich Ltd | Hospitality | 2020 |
| ALI Suppliers Ltd | Wholesale & retail | 2025 |
| Ali.Glam.Fitness Limited | Arts & recreation | 2025 |
| Alias 2025 Ltd | Hospitality | 2025 |
| Alias Norfolk Ltd | Hospitality | 2023 |
| Alice and the Hair Ltd | Other services | 2018 |
| Alice Blessing (Private) Limited | Other services | 2012 |
| Alice Fawke Ltd | Wholesale & retail | 2018 |
| Alice Hare Consulting Ltd | Professional & scientific | 2022 |
| Alicia Coffee House Ltd | Hospitality | 2023 |
| Alicia James Consulting Limited | Professional & scientific | 2013 |
| Alien Games Limited | Wholesale & retail | 2003 |
| Align Chiropractic (Norfolk) Limited | Health & social care | 2013 |
| Align Solutions Global Ltd | Professional & scientific | 2026 |
| Alikate Consulting Ltd | Other services | 2019 |
| Alimax Properties Limited | Administrative & support | 1995 |
| Alina Shineclean Ltd | Administrative & support | 2026 |
| Alincare Limited | Health & social care | 2022 |
| Alis Driving Academy Ltd | Education | 2025 |
| Alison Microwave Limited | Manufacturing | 1986 |
| Alisons Equestrian and Pet Supplies Limited | Wholesale & retail | 2015 |
| Alitaxis Norwich Ltd | Transport & logistics | 2019 |
| Alizi Properties Ltd. | Real estate | 2026 |
| Alkmaar Court Management Company Limited | Real estate | 2003 |
| ALL Access Electrical Limited | Professional & scientific | 2008 |
| ALL Building Work Ltd | Construction | 2025 |
| ALL Clear Rubbish Services Ltd | Other services | 2021 |
| ALL D&Co Designs Ltd | Extraterritorial | 2021 |
| ALL Day Care Services Ltd | Health & social care | 2012 |
| ALL Electrical & Testing Ltd | Construction | 2010 |
| ALL Energy Solutions Ltd | Administrative & support | 2021 |
| ALL Faiths Direct Cremations Limited | Other services | 2023 |
| ALL Faiths Remembrance Parks Limited | Other services | 2016 |
| ALL Glass Cleaning Services Ltd | Administrative & support | 2015 |
| ALL Green Associates Ltd | Administrative & support | 2013 |
| ALL Keyed UP Norwich Ltd | Hospitality | 2019 |
| ALL Pace Races Ltd | Arts & recreation | 2023 |
| ALL Seasons Chefs Limited | Hospitality | 2016 |
| ALL Systems (Anglia) Limited | Construction | 2015 |
| ALL the RAJ Property Ltd. | Construction | 1997 |
| ALL Things Antenatal Ltd | Information & communication | 2019 |
| ALL Things Nice Gifting Ltd | Wholesale & retail | 2025 |
| ALL Tribes Ltd | Information & communication | 2024 |
| All-In Theatre Productions Limited | Arts & recreation | 2018 |
| All-You-Need-Living Limited | Wholesale & retail | 2013 |
| All.Smile Cleaning Limited | Administrative & support | 2011 |
| Allan Goody Associates Ltd | Professional & scientific | 2009 |
| Allbeta Limited | Construction | 2020 |
| Allcare Community Support Limited | Health & social care | 2013 |
| Allcut Machine Tools Limited | Wholesale & retail | 1968 |
| Alldoors Repairs Ltd | Construction | 2014 |
| Allen & Rogers Builders Ltd | Construction | 2018 |
| Allen Medicare Limited | Health & social care | 2017 |
| Allen-Aldus Surveying Ltd | Professional & scientific | 2024 |
| Allerworth Limited | Wholesale & retail | 1988 |
| Allgood & Davey Ltd | Real estate | 2014 |
| Allgood Investments Ltd | Extraterritorial | 2015 |
| Alliance Norse Limited | Administrative & support | 2022 |
| Alliance OIL Company Limited | Professional & scientific | 2016 |
| Alliance Point Limited | Health & social care | 2014 |
| Alliance Property Maintenance Ltd | Construction | 2019 |
| Alliance Sales Support Services EOT Limited | Administrative & support | 2024 |
| Alliance Sales Support Services Limited | Professional & scientific | 2013 |
| Allied Energy Limited | Professional & scientific | 2016 |
| Allied Serve Ltd | Health & social care | 2018 |
| Allies Computing Limited | Information & communication | 1987 |
| Allies Computing Trustees Limited | Professional & scientific | 2015 |
| Allipine Ltd | Professional & scientific | 2022 |
| Alliscont Ltd | Wholesale & retail | 2016 |
| Allison Business Solutions Ltd | Professional & scientific | 2013 |
| Allison Freehold Limited | Households | 2024 |
| Allison Heights RTM Company Limited | Households | 2020 |
| Allison Risebro & Co. Limited | Hospitality | 1979 |
| Allkitchens Ltd | Financial services | 2022 |
| Allmark Services Limited | Construction | 2004 |
| Alloro Competizione Limited | Arts & recreation | 2024 |
| Allseals UK Limited | Financial services | 2015 |
| Allstar Systems (Norwich) Ltd | Construction | 2017 |
| Allstart Diesels Ltd | Wholesale & retail | 2016 |
| Allthingsdough Ltd | Hospitality | 2023 |
| Allthryv Ltd | Information & communication | 2026 |
| Alltrades Building Services (East Anglia) Limited | Construction | 2010 |
| Ally's Beauty Room Limited | Other services | 2021 |
| ALM Carpentry Limited | Manufacturing | 2008 |
| Alma Norwich Ltd | Arts & recreation | 2024 |
| Almalema Limited | Professional & scientific | 2022 |
| Almaris Kennels Ltd | Agriculture & fishing | 2019 |
| Almary Green Holdings Limited | Financial services | 2018 |
| Almary Green Investments Limited | Financial services | 2001 |
| Almel Ltd | Health & social care | 2025 |
| Almond Tree Care Ltd | Health & social care | 2020 |
| Alncare Limited | Health & social care | 2020 |
| Alora Innovations UK Ltd | Professional & scientific | 2024 |
| Aloy Limited | Hospitality | 2023 |
| ALP Consultants Limited | Professional & scientific | 2011 |
| Alpha Beta Gama Ltd | Transport & logistics | 2023 |
| Alpha Black Limited | Real estate | 2020 |
| Alpha Building and Heating Ltd | Construction | 2017 |
| Alpha Commodities UK Ltd | Transport & logistics | 2025 |
| Alpha Construction (East Anglia) Limited | Construction | 2010 |