| Antony Norris ACA Ltd | Professional & scientific | 2003 |
| Antony YIN Limited | Real estate | 2019 |
| Antscapes and Groundworks Ltd | Administrative & support | 2020 |
| Anubis Solutions Ltd | Administrative & support | 2016 |
| Anulin International Ltd | Wholesale & retail | 2025 |
| Anum Properties Ltd | Real estate | 2025 |
| Anuu's Cafe Limited | Hospitality | 2025 |
| Anvil Fabrications Limited | Manufacturing | 2003 |
| Anwar & Gousia Group Ltd | Professional & scientific | 2025 |
| Anwar & Gousia Ltd | Real estate | 2022 |
| Anwar Food Limited | Hospitality | 2025 |
| Anway Washroom Ltd | Administrative & support | 2007 |
| Anxo Limited | Administrative & support | 2018 |
| ANY Event International Limited | Administrative & support | 2005 |
| ANY Event Limited | Administrative & support | 1996 |
| ANY RAD Ltd | Health & social care | 2022 |
| ANY Road Limited | Information & communication | 2019 |
| ANY Time Skip & Plant Hire Limited | Administrative & support | 2004 |
| Anyhave Ltd | Wholesale & retail | 2024 |
| Anypumps Limited | Professional & scientific | 1986 |
| Anything BUT Cattle Limited | Wholesale & retail | 2012 |
| Anytime Home UVB Ltd | Other services | 2019 |
| Anytime Sunbeds Ltd | Administrative & support | 2017 |
| Aohh Ltd | Agriculture & fishing | 2021 |
| AP Dental Services Limited | Health & social care | 2025 |
| AP Lifters Ltd | Professional & scientific | 2024 |
| AP Plastering (Midlands) Ltd | Construction | 2017 |
| Apachia Academy Ltd | Education | 2022 |
| Apartio Ltd | Construction | 2012 |
| Apartment Story Ltd | Real estate | 2023 |
| APB CAD Limited | Professional & scientific | 2008 |
| Apcrm Limited | Information & communication | 2022 |
| APD Horizons Ltd | Professional & scientific | 2016 |
| Aperam Recycling Stainless UK Limited | Wholesale & retail | 1980 |
| Apex Andrews Ltd | Transport & logistics | 2017 |
| Apex Braking Ltd | Wholesale & retail | 2025 |
| Apex Car Sales Ltd | Wholesale & retail | 2026 |
| Apex Consulting Engineers Limited | Professional & scientific | 2011 |
| Apex Developments Ltd | Construction | 2022 |
| Apex Green Horticultural Design Studio Limited | Agriculture & fishing | 2021 |
| Apex Homes (Yorkshire) Limited | Real estate | 2015 |
| Apex Integrity Access Ltd | Construction | 2026 |
| Apex Investment Resources Limited | Real estate | 2024 |
| Apex Joinery (South Yorkshire) Limited | Construction | 2020 |
| Apex Laboratories Ltd | Other services | 2025 |
| Apex Landscapers Limited | Administrative & support | 2024 |
| Apex Liquids Ltd | Construction | 2025 |
| Apex Performance Engineering Ltd | Professional & scientific | 2024 |
| Apex Pest Control Ltd | Administrative & support | 2025 |
| Apex Programme Limited | Education | 2015 |
| Apex Refurb & Maintenance Ltd | Construction | 2025 |
| Apex Sheffield (Holdings) Limited | Financial services | 2022 |
| Apex Sheffield (Properties) Limited | Real estate | 2022 |
| Apex Sheffield Limited | Transport & logistics | 1998 |
| Apex Tsco Services Ltd | Construction | 2025 |
| Apexautomotivecentre Ltd | Wholesale & retail | 2024 |
| Apexfit Joinery and Shop Fit Limited | Construction | 2026 |
| APF Digital Ltd | Information & communication | 2022 |
| Apgar UK Ltd | Information & communication | 2020 |
| Aphelia Limited | Information & communication | 2026 |
| Aphvn Limited | Information & communication | 2024 |
| Apna Style Ltd | Hospitality | 2018 |
| Apna Transport Ltd | Transport & logistics | 2023 |
| Apocalypse Academy Ltd | Arts & recreation | 2024 |
| Apollo 458 Ltd | Wholesale & retail | 2023 |
| Apollo 777 Ltd | Wholesale & retail | 2021 |
| Apollo Accommodation Group Limited | Real estate | 2025 |
| Apollo Distribution Solutions (Sheffield) Limited | Transport & logistics | 2003 |
| Apollo Fuels Limited | Wholesale & retail | 1988 |
| Apollo Gardening Limited | Wholesale & retail | 2002 |
| Apollo Healthcare Services Limited | Professional & scientific | 2021 |
| Apollo I.T Services Limited | Information & communication | 2009 |
| Apollo Taxis 2017 Limited | Transport & logistics | 2017 |
| Apollo's Lyre Ltd. | Information & communication | 2017 |
| Apollon Greek Ltd | Hospitality | 2021 |
| Aposl Sheffield Limited | Manufacturing | 2017 |
| App Smile Ltd | Health & social care | 2022 |
| App Smile Tickhill Ltd | Financial services | 2025 |
| App&Web Designers.Com Ltd | Information & communication | 2018 |
| Apparel Tech Ltd | Administrative & support | 2013 |
| Appeal Guidance Limited | Education | 2026 |
| Appetizer Limited | Hospitality | 2025 |
| Appguru Limited | Information & communication | 2017 |
| Applatch Ltd | Information & communication | 2023 |
| Apple Aluminium Limited | Manufacturing | 2008 |
| Apple Construction & Building Contractors Ltd | Real estate | 2015 |
| Apple UK Estates Ltd | Real estate | 2019 |
| Appleby Randall Limited | Professional & scientific | 2005 |
| Applebys IND Fasteners Ltd | Construction | 2016 |
| Applebys Industrial Supplies Limited | Wholesale & retail | 2019 |
| Appledew Property Limited | Real estate | 2004 |
| Appleford Holdings Limited | Real estate | 2018 |
| Applegate Psychology Ltd | Professional & scientific | 2023 |
| Apples and Bears Ltd | Hospitality | 2023 |
| Appletree Childcare (Sheffield) Ltd. | Education | 2005 |
| Appleyard Projects Limited | Professional & scientific | 2014 |
| Applied Behaviour Analysis Sheffield Ltd | Education | 2023 |
| Applied Design and Architecture Ltd | Professional & scientific | 2017 |
| Applied Informatics Limited | Information & communication | 2010 |
| Appointai Ltd | Extraterritorial | 2025 |