| Ampavis Limited | Fareham | 2025 |
| Ampay Limited | London | 1999 |
| Ampc Group Ltd | Shoreham-By-Sea | 2024 |
| Ampec Limited | Leyland | 2001 |
| Amped Digital Ltd | Glasgow | 2022 |
| Amped Pictures Ltd | London | 2020 |
| Amped Signals Labs Ltd | Brighton | 2025 |
| Amped Vision Ltd | Newcastle | 2026 |
| Ampelm Ltd | Glasgow | 2010 |
| Ampelora Ltd | Chester | 2026 |
| Ampere Digital Ltd | Kilmarnock | 2025 |
| Ampere Technology Consulting Ltd | London | 2024 |
| Amperia Limited | Belfast | 2012 |
| Amperie Labs Limited | Corby | 2026 |
| Ampernomics Ltd | Bicester | 2026 |
| Amperry Consulting Ltd | Newport | 2011 |
| Ampersand Broadcasting Ltd | Llanidloes | 2017 |
| Ampersand Commerce Limited | Leeds | 2009 |
| Ampersand Communications Ltd | Edinburgh | 2025 |
| Ampersand Consultancy Limited | London | 2025 |
| Ampersand Creative Limited | Reigate | 2010 |
| Ampersand Digital Ltd | London | 2020 |
| Ampersand Editorial Limited | Mold | 2012 |
| Ampersand Engineering Limited | Newtownabbey | 2016 |
| Ampersand Game Studios Ltd | London | 2018 |
| Ampersand House Limited | London | 2026 |
| Ampersand Inc Limited | Milton Keynes | 2024 |
| Ampersand Industries Ltd | Redruth | 2009 |
| Ampersand Intelligence Ltd | London | 2026 |
| Ampersand Media International Ltd | London | 2017 |
| Ampersand Parker Ltd | Warwick | 2023 |
| Ampersand Picture Limited | Bridport | 2023 |
| Ampersand Scripts Limited | Buxton | 2003 |
| Ampersand Studio Oxon Ltd | Banbury | 2022 |
| Ampersand Technologies Ltd | Rickmansworth | 2025 |
| Ampersand-It Ltd | Blackwood | 2020 |
| Ampersand-Us Ltd | Manchester | 2017 |
| Ampersandmin Ltd | Wembley | 2017 |
| Ampersat Internet Publishing Ltd | Bradford | 2006 |
| Ampersoft Limited | Derby | 2001 |
| Ampersound Ltd | London | 2017 |
| Ampervan Ltd | Wirral | 2026 |
| Amperzand Ltd | Mildenhall | 2026 |
| Ampfield Consulting Services Ltd | Chandler'S Ford | 2017 |
| Ampformatics Ltd. | Coventry | 2012 |
| Ampha Limited | Newbury | 2016 |
| Ampham Consulting & Technolgy Ltd | London | 2024 |
| Amphaus Ltd | London | 2024 |
| Amphi Health Ltd | London | 2024 |
| Amphi Labs Ltd | London | 2025 |
| Amphi Solutions Ltd | Chesterfield | 2024 |
| Amphi Technologies Ltd | London | 2021 |
| Amphibious ZOO (UK) Limited | London | 2014 |
| Amphion Consulting Limited | Coventry | 2011 |
| Amphion Semiconductor Ltd | Belfast | 2022 |
| Amphisoft Ltd | Retford | 2023 |
| Amphitrite Works Ltd | Kenley | 2022 |
| Amphlett IT Consultancy Ltd | Croydon | 2013 |
| Amphlex Holdings Ltd | Leigh-On-Sea | 2023 |
| Amphora Research Systems Limited | Bracknell | 2003 |
| Amphora Software Limited | London | 2019 |
| Amphora Topco Limited | Farnborough | 2011 |
| Amphora UK Limited | London | 2002 |
| Amphoteric Ltd | London | 2025 |
| Ampics Media Ltd | Northampton | 2026 |
| Ampifi Ltd | London | 2021 |
| Ampio Digital Ltd | Edgware | 2024 |
| Ampios Management Partners Limited | Wigan | 2003 |
| Ampito Limited | Hove | 2005 |
| Ampk Training Ltd | London | 2015 |
| Amplab Enterprises Ltd | London | 2024 |
| Amplaify Innovations Ltd | Horsham | 2025 |
| Amplaz Ltd | London | 2024 |
| Ample Ebusiness Ltd | Hayes | 2023 |
| Ample Generators Limited | Sunbury-On-Thames | 2009 |
| Ample International E College Limited | London | 2026 |
| Ample International Education Limited | London | 2019 |
| Ample Play Limited | London | 2011 |
| Ample Roads Ltd | Blackpool | 2015 |
| Ample Walrus Solutions Limited | Hythe | 2018 |
| Amplead Limited | Southampton | 2019 |
| Amplecom Limited | Swindon | 1998 |
| Ampleet Ltd | London | 2025 |
| Amplehaus Limited | London | 2025 |
| Amplerise Limited | Bury St. Edmunds | 2025 |
| Ampletech Ltd | Birmingham | 2015 |
| Ampletime Ltd | London | 2012 |
| Amplexus Solutions Limited | Nuneaton | 2012 |
| Ampli Limited | Truro | 2024 |
| Amplicon Press Ltd | London | 2023 |
| Amplience (Midco) Limited | London | 2022 |
| Amplience (Nominees) Limited | London | 2018 |
| Amplience (UK) Limited | London | 2010 |
| Amplifi & Impact Limited | London | 2015 |
| Amplifi Group Holdings Ltd | Ashtead | 2026 |
| Amplifi Group Limited | Leamington Spa | 2015 |
| Amplifi Limited | Coventry | 2025 |
| Amplifi UK Holdings Limited | Leamington Spa | 2021 |
| Amplified Consultancy Limited | Harpenden | 2018 |
| Amplified Digital Ltd | London | 2022 |