| Amlin Holdings Limited | Brierley Hill | 2018 |
| Amlion Risk Solutions Limited | Milton Keynes | 2011 |
| Amlm Holdco Limited | Dundee | 2026 |
| Amlo Holdings Ltd | Merthyr Tydfil | 2023 |
| Amlon Ltd | Hemel Hempstead | 2022 |
| Amlrs UK Acquireco Limited | Altrincham | 2021 |
| AMM Business Ltd | London | 2020 |
| AMM Financial Ltd | Liverpool | 2021 |
| AMM IFA Limited | Widnes | 2022 |
| Amma Holding Group Ltd | Bedford | 2023 |
| Amma Partners Ltd | London | 2024 |
| Amman Valley Group Limited | Ammanford | 2011 |
| Ammanford Holding Limited | Ammanford | 2025 |
| Ammar Investment Ltd | Manchester | 2018 |
| Ammb Ltd | Hebburn | 2024 |
| Ammcass Services (UK) Ltd | London | 2017 |
| Ammeraal Beltech UK Holding Limited | Hertford | 2016 |
| Ammi Holdco Limited | London | 2025 |
| Ammique Production Ltd | Bath | 2020 |
| Ammis Risk Solutions Limited | Tonbridge | 2015 |
| Ammk Enterprises Ltd | Birmingham | 2022 |
| Ammk Ltd | Sudbury | 2010 |
| Ammo & Company Holdings Ltd | Birmingham | 2020 |
| Ammocom Holdings Limited | Stoke-On-Trent | 2023 |
| Ammonite Capital 2 Limited | Leeds | 2023 |
| Ammonite Environmental Ltd | Stoke On Trent | 2022 |
| Ammoragroup Ltd | London | 2025 |
| Ammper UK Limited | London | 2024 |
| Ammsimm Ltd | Glasgow | 2026 |
| AMN Sourcing Ltd | London | 2025 |
| AMN Trading Limited | London | 2023 |
| Amna Holdings Ltd | South Shields | 2026 |
| Amnn Limited | London | 2022 |
| Amns Holdings Limited | Southampton | 2019 |
| Amnt Holdings Limited | Leamington Spa | 2025 |
| Amnuk Ltd | London | 2025 |
| AMO Holdco Limited | Kidlington | 2024 |
| AMO Hospitality Ltd | St Agnes | 2021 |
| AMO Money Transfer & Exchange Ltd | East Ham | 2018 |
| AMO Racing Holdings Limited | Newmarket | 2021 |
| Amoa Holdings Ltd | Streatham | 2025 |
| Amoa Limited | Hove | 2010 |
| Amoc Investments Ltd | London | 2021 |
| Amoco Investments Ltd | Newport | 2017 |
| Amocura Investments Limited | Northampton | 2008 |
| Amoeba Limited | Shefford | 1991 |
| Amof Accounting Ltd | Horbury | 2021 |
| Amol Life Ltd | Bristol | 2024 |
| Amolsa Holdings Limited | Sherborne | 2025 |
| Amondin Limited | Potters Bar | 2022 |
| Amonfield Limited | Oldham | 1986 |
| Amor Asset Management Ltd | London | 2023 |
| Amor Financial Ltd | Tunbridge Wells | 2017 |
| Amor International Ltd | Wells | 2024 |
| Amorapia Holdings Ltd | Stoke-On-Trent | 2026 |
| Amore Holdings Ltd | Hertfordshire | 2024 |
| Amore Investments (Yorkshire) Limited | Huddersfield | 2025 |
| Amore Mortgages Limited | Waterlooville | 2025 |
| Amore Topco Limited | Waterlooville | 2025 |
| Amoreau Holdings Limited | Chelmsford | 2024 |
| Amork Ltd | Ealing | 2025 |
| Amorphous State Limited | Swaffham | 2017 |
| Amortentia Bidco Limited | London | 2023 |
| Amortentia Midco Limited | London | 2023 |
| Amory Holdings Limited | Bedford | 2004 |
| Amos Beech Holdings Limited | Falkirk | 2026 |
| Amos Finance Ltd | London | 2011 |
| Amos Hill Holdings Limited | Newport | 2020 |
| Amos Homes (Hartington) Ltd | Ashbourne | 2017 |
| Amounderness Insurance Services Limited | Poulton-Le-Fylde | 2010 |
| Amountword (II) Limited | London | 1992 |
| Amour Capital Ltd | Gerrards Cross | 2026 |
| Amoura Living Ltd | Bury St. Edmunds | 2025 |
| Amouyan Invest Limited | Corby | 2014 |
| Amouze Ltd | Cardiff | 2022 |
| Amova AM Global Holdings Limited | London | 1998 |
| Amova Asset Management UK Limited | London | 1984 |
| Amoyensis Limited | Welwyn Garden City | 2024 |
| AMP - Athos Management & Partecipation Ltd | London | 2021 |
| AMP Biomass Finco Limited | London | 2021 |
| AMP Biomass Holdings Limited | London | 2021 |
| AMP Capital Holdings Limited | Leeds | 2022 |
| AMP Derivatives Ltd | Harrow | 2009 |
| AMP Financial Services Limited | Newton Aycliffe | 2022 |
| AMP Global Group Ltd | York | 2021 |
| AMP Global Holdings Ltd | Maldon | 2024 |
| AMP Grapes Investments Limited | London | 2022 |
| AMP Holdings Limited | Canterbury | 2021 |
| AMP Innovation Holdings Limited | London | 2021 |
| AMP Legacy Ltd | Plymouth | 2023 |
| AMP Project Holdings Limited | London | 2022 |
| AMP Projects Finco 2 Limited | London | 2022 |
| AMP Projects Finco Limited | London | 2022 |
| AMP Resources Ltd | London | 2026 |
| AMP Topco Ltd | London | 2025 |
| AMP UK Members Limited | Newtownabbey | 2012 |
| AMP Vehicle Finance Limited | Ness | 2008 |
| AMP132 Limited | Redhill | 2017 |
| Ampath Investments UK Limited | London | 2020 |
| Ampco 107 Limited | St Asaph | 2014 |