| Amplifyplus Limited | Bury St. Edmunds | 2023 |
| Amplifyservices Limited | Borth | 2025 |
| Amplifysme Ltd | Congleton | 2025 |
| Amplifythis Limited | London | 2024 |
| Amplifyx Consulting Ltd | Chester | 2026 |
| Amplifyze Ltd | London | 2023 |
| Amplio Africa Limited | Kensington | 2020 |
| Amplio Consulting Ltd | Harrogate | 2012 |
| Amplio Limited | Warwick | 2018 |
| Amplio Management Consulting Limited | Cranleigh | 2015 |
| Amplio Technologies Ltd | Ashford | 2020 |
| AMPLIO360 Ltd | Felixstowe | 2020 |
| Ampliora Ltd | London | 2025 |
| Ampliphi Ltd | York | 2023 |
| Amplisi Limited | Sheffield | 2025 |
| Amplisynth Ltd | Cheadle | 2024 |
| Amplitask Limited | Brecon | 2025 |
| Amplitude Advisors Ltd | London | 2018 |
| Amplitude Inspection Services Limited | Aberdeen | 2017 |
| Amplitude Music Limited | Winchester | 2015 |
| Amplitude Tax Accountants Limited | Cornwall | 2004 |
| Amplity Ltd | Gerrards Cross | 2008 |
| Amplius Partners Limited | London | 2018 |
| Amplivert Limited | London | 2023 |
| Amplivue Marketing Ltd | Heywood | 2026 |
| Amplo London Ltd | Bicester | 2015 |
| Amplus Energy Group Limited | Aberdeen | 2024 |
| Amplus Fortis Ltd | Stockport | 2017 |
| Amplus Production Limited | High Wycombe | 1998 |
| Amplus Property Solutions Ltd | London | 2011 |
| Amply (London) Limited | London | 2025 |
| Amply Discovery Limited | Belfast | 2021 |
| Amply Haus Ltd | London | 2025 |
| Amplyftmarketing Limited | Burnley | 2025 |
| Amplyne Ltd | Warrington | 2025 |
| Amplyon Ltd | London | 2025 |
| Ampm (Contracting) Limited | Birmingham | 2018 |
| Ampm Commercial Services Ltd | London | 2010 |
| Ampm Consultancy Ltd | Newry | 2021 |
| Ampm Legal Limited | Rochdale | 2025 |
| Ampm Maintenance Limited | Woodford Green | 2008 |
| Ampm Marketing Limited | Cirencester | 2008 |
| Ampm Services Limited | Liverpool | 2021 |
| Ampofo Intelligence Ltd | Bury St. Edmunds | 2023 |
| Amporah Ltd | Warminster | 2025 |
| Ampoulabs Ltd | Wetherby | 2026 |
| Ampoxe Ltd | Stockton-On-Tees | 2024 |
| Ampp Services Limited | Ely | 2007 |
| Amppath Ltd | Consett | 2025 |
| Ampr Ltd | London | 2019 |
| Ampr Marketing Ltd | London | 2022 |
| Amprako Studio Ltd | Croydon | 2022 |
| Ampro Boxing Limited | Shenfield | 2018 |
| Amprocon Limited | Liverpool | 2024 |
| Amprofessional Ltd | London | 2026 |
| Amprotech Limited | Middlesbrough | 2005 |
| Ampsign Computers Limited | Bushey Heath | 1990 |
| Ampt Consultancy Ltd | Beckenham | 2026 |
| Amptech Energy Solutions Limited | Orpington | 2019 |
| Ampthill Construction Services Limited | Bedford | 2015 |
| Ampthill Estates 1 Ltd | London | 2023 |
| Ampublicity Limited | New Malden | 2008 |
| Ampuk Holdings Ltd | Newtownabbey | 2015 |
| Ampurias Ventures Limited | Surrey | 2018 |
| Amputation Claims Advocates Limited | London | 2025 |
| Ampx Hardware Limited | London | 2019 |
| Ampx Limited | London | 2019 |
| Ampy Amersham Ltd | Amersham | 2025 |
| Ampy Amersham Park Ltd | Amersham | 2025 |
| Ampy Aylesbury Ltd | Aylesbury | 2025 |
| Ampy Chesham Hill Ltd | Chesham | 2025 |
| Ampy Chesham Ltd | Chesham | 2025 |
| Ampy Denham Ltd | Uxbridge | 2025 |
| Ampy High Wycombe Ltd | High Wycombe | 2025 |
| Ampy Research Ltd | London | 2025 |
| Ampyr DG UK ASSETCO1 Limited | Letchworth Garden City | 2023 |
| Ampyr Distributed Energy 1 Ltd | Letchworth Garden City | 2024 |
| Ampyr Distributed Energy 2 Ltd | Letchworth Garden City | 2024 |
| Ampyr Energy UK Management Services Limited | London | 2024 |
| Ampyr Idea UK Ltd | Letchworth Garden City | 2023 |
| AMQ Engineering Ltd | Redditch | 2020 |
| AMQ Professional Limited | Basildon | 2014 |
| AMR Accounting and Project Management Solutions Limited | Glasgow | 2010 |
| AMR Accounting Services Limited | High Wycombe | 2023 |
| AMR Ahmed Consulting Ltd | Slough | 2024 |
| AMR Bayoumi Ltd | Watford | 2023 |
| AMR Bookkeeping & Accounts Limited | Portsmouth | 2006 |
| AMR Business Services Ltd | Glasgow | 2022 |
| AMR Cargo Solutions Ltd | Kilmarnock | 2025 |
| AMR Communications Ltd | Haslemere | 2016 |
| AMR Construction Law Services Ltd | St. Helens | 2023 |
| AMR Consult Limited | London | 2008 |
| AMR Consult Management Ltd | London | 2017 |
| AMR Consulting Limited | Watford | 2011 |
| AMR Consulting Services Limited | Watford | 2018 |
| AMR Digital Ltd | Birmingham | 2020 |
| AMR Digital Solutions Ltd | London | 2025 |
| AMR Financial Planning Ltd | Kenilworth | 2024 |
| AMR Freelance Limited | Milton Keynes | 2024 |
| AMR Garner Consulting Limited | Rainham | 2011 |