| ALL 2 Trade Limited | Wholesale & retail | 2014 |
| ALL 4 Clean Ltd | Administrative & support | 2025 |
| ALL About Living Limited | Wholesale & retail | 2017 |
| ALL Apparel Limited | Manufacturing | 2018 |
| ALL Bright Window Installations Limited | Manufacturing | 2024 |
| ALL Cars 786 Ltd | Wholesale & retail | 2025 |
| ALL Ceilings Limited | Construction | 2003 |
| ALL Clean Northampton Ltd | Administrative & support | 2022 |
| ALL Concrete Pumping and Construction Ltd | Construction | 2019 |
| ALL Day Store Ltd | Wholesale & retail | 2025 |
| ALL Day Store Tobacco Ltd | Wholesale & retail | 2025 |
| ALL Eco Electrical Limited | Construction | 2025 |
| ALL Eyes Security and Facility Management Ltd | Administrative & support | 2017 |
| ALL Finance Solutions Limited | Real estate | 2018 |
| ALL GAS Services (Lincoln) Limited | Construction | 2015 |
| ALL Grand Franchises Ltd | Hospitality | 2023 |
| ALL Grand Investments Ltd | Financial services | 2018 |
| ALL Grand Motors Ltd | Wholesale & retail | 2019 |
| ALL Grand Properties Ltd | Real estate | 2023 |
| ALL Impex Ltd | Wholesale & retail | 2018 |
| ALL in One Leicester Ltd | Wholesale & retail | 2026 |
| ALL in One Supplies Ltd | Wholesale & retail | 2026 |
| ALL in the Numbers Ltd | Professional & scientific | 2026 |
| ALL Kinds of Catholic CIC | Manufacturing | 2026 |
| ALL Kitchen Projects Ltd | Construction | 2021 |
| ALL Masons Locksmiths Limited | Other services | 2014 |
| ALL Meats One Limited | Other services | 2022 |
| ALL Midlands Bricklayers Ltd | Construction | 2021 |
| ALL Nice and Clean Limited | Other services | 2010 |
| ALL Play Solutions Ltd | Construction | 2019 |
| ALL Plumbed Ltd | Construction | 2015 |
| ALL Purpose Holdings Limited | Financial services | 2025 |
| ALL Roads Asphalt Solutions Ltd. | Construction | 2008 |
| ALL Roads UN Ltd | Transport & logistics | 2018 |
| ALL Screwed UP Limited | Wholesale & retail | 2008 |
| ALL Season Traders Ltd | Hospitality | 2019 |
| ALL Seasons (Leic) Ltd | Wholesale & retail | 2023 |
| ALL Seasons Traders Ltd | Wholesale & retail | 2019 |
| ALL SHE Wants Clothing Ltd | Manufacturing | 2020 |
| ALL Sorts Property Services Ltd | Construction | 2025 |
| ALL Star Fitness Ltd | Arts & recreation | 2021 |
| ALL Star Garages Limited | Wholesale & retail | 2005 |
| ALL Steel Designs UK Limited | Manufacturing | 2024 |
| ALL Style Design Limited | Wholesale & retail | 1967 |
| ALL Systems Direct Limited | Transport & logistics | 2014 |
| ALL That (MFG) Ltd | Manufacturing | 2017 |
| ALL to ALL Marketing Limited | Wholesale & retail | 2025 |
| ALL Trade Construction Supplies Ltd | Wholesale & retail | 2023 |
| ALL Van Parts Limited | Wholesale & retail | 2026 |
| ALL Vehicle Contracts East Midlands Limited | Wholesale & retail | 2018 |
| ALL Vehicle Repairs Ltd | Other services | 2025 |
| ALL Weather Roofing Leicester Ltd | Construction | 2025 |
| ALL Weather Trade Windows Limited | Manufacturing | 2016 |
| ALL Weather Windows Limited | Construction | 2008 |
| All-In Access-Ability Community Interest Company | Professional & scientific | 2024 |
| All-Zones Courier Ltd | Transport & logistics | 2020 |
| ALL2BUY Ltd | Wholesale & retail | 2024 |
| Alla-Aamin Limited | Wholesale & retail | 2018 |
| Allag Care Limited | Health & social care | 2014 |
| Allag Housing Ltd | Real estate | 2020 |
| Allama Iqbal Limited | Wholesale & retail | 2025 |
| Allan & Co Limited | Professional & scientific | 2012 |
| Allan Healthcare Services Limited | Health & social care | 2013 |
| Allana Investments Ltd | Real estate | 2022 |
| Allana Optical Ltd | Health & social care | 2026 |
| Allandale House (Leicester) Limited | Households | 1977 |
| Allandale Properties Leics Ltd | Real estate | 2025 |
| Allardyce Interiors Ltd | Construction | 2019 |
| Allbright Bishop Rowley Limited | Financial services | 2000 |
| Allbro Limited | Wholesale & retail | 2000 |
| Alldrains Services Ltd | Other services | 2018 |
| Allen Bastick & Billson Limited | Real estate | 1950 |
| Allen Glenold Limited | Wholesale & retail | 1983 |
| Allen Render Holdings Ltd | Financial services | 2019 |
| Allen Render Solutions Ltd | Construction | 2011 |
| Allenbytech Ltd | Construction | 2025 |
| Allens Holdings Inc Limited | Real estate | 2025 |
| Allerton Transport Ltd | Transport & logistics | 2014 |
| Alleston Electrical Ltd | Construction | 2025 |
| Allexton Community Nursery C.I.C. | Education | 2006 |
| Alli Properties Ltd | Real estate | 2024 |
| Alliance & Leicester Limited | Extraterritorial | 1996 |
| Alliance Combined Services Limited | Other services | 2023 |
| Alliance Contracts Limited | Wholesale & retail | 2003 |
| Alliance Mortgages AE Limited | Financial services | 2024 |
| Alliance One Limited | Wholesale & retail | 2022 |
| Alliance Property Developers Ltd | Construction | 2024 |
| Alliance Tooling Limited | Manufacturing | 1997 |
| Allideas Limited | Arts & recreation | 2005 |
| Allie and GUY Limited | Information & communication | 2018 |
| Allied Automotive Ltd | Wholesale & retail | 2019 |
| Allied Motorsport Ltd | Wholesale & retail | 2017 |
| Alline Stores Ltd | Wholesale & retail | 2019 |
| Allingham Investments Limited | Administrative & support | 2011 |
| Allinone Business Directory Ltd | Administrative & support | 2023 |
| Allinonecatering Limited | Hospitality | 2020 |
| Allinson Plumbing and Heating Limited | Construction | 2022 |
| Allipium Ltd | Wholesale & retail | 2020 |
| Alliross Ltd | Administrative & support | 2024 |
| Allium Sky Ltd | Wholesale & retail | 2024 |