| Amma’S HUG CIC | Hereford | 2025 |
| Ammc Services Ltd | Glasgow | 2024 |
| Ammerdown Shoot Ltd | Radstock | 2021 |
| Ammo International Productions Ltd | London | 2024 |
| Ammy Drammeh Studios Ltd | London | 2020 |
| Ammy Robinson Media Production Ltd | Haverfordwest | 2026 |
| Amna Minque Limited | London | 2013 |
| Amna Mogul Ltd | Cardiff | 2019 |
| Amnesia House UK Promotions Ltd | Leamington Spa | 2023 |
| Amnesia Limited | Inverurie | 2023 |
| AMO Racing Limited | Newmarket | 2003 |
| Amoeba Child Limited | London | 2022 |
| Amoenus | London | 2020 |
| Among the Boughs Ltd | Broadstone | 2021 |
| Amongst Others Ltd | Doncaster | 2011 |
| Amor Rustic Arts Limited | Dromore | 2019 |
| Amora Creations Ltd | Newcastle Upon Tyne | 2025 |
| Amora Ventures Ltd | London | 2025 |
| Amore & Co Events Ltd | Leicester | 2023 |
| Amore Dance and Pilates Limited | Warminster | 2025 |
| Amorelingerie Ltd | London | 2025 |
| Amores Writing Limited | London | 2025 |
| Amorewellnessmcr CIC | Manchester | 2025 |
| Amorin Ltd | Longniddry | 2023 |
| Amoryr Management Ltd | Solihull | 2022 |
| Amos GAR Limited | London | 2025 |
| Amos Pictures Ltd | London | 1998 |
| Amotalis Limited | Hackney | 2015 |
| Amour INK Ltd | Great Yarmouth | 2014 |
| Amour Music Limited | Leighton Buzzard | 2013 |
| Amour Padel Ltd | Stockport | 2025 |
| Amovida Ltd | East Horsley | 2023 |
| AMP Audio Solutions Ltd | Luton | 2008 |
| AMP Channel Music Limited | Bristol | 2007 |
| AMP Creative Studios CIC | Ballymoney | 2023 |
| AMP Dance Ltd | London | 2019 |
| AMP Music Management Limited | London | 2022 |
| AMP Music Productions Limited | | 2007 |
| AMP Music Yorkshire | York | 2009 |
| AMP Properties (N.I.) Ltd | Carrickfergus | 2025 |
| AMP Reform Limited | Purfleet | 2024 |
| AMP Sound and Hire Limited | Godalming | 2016 |
| Ampd 2 Services Ltd | London | 2025 |
| Ampd Group Ltd | London | 2025 |
| Ampd Holdings Ltd | Manchester | 2025 |
| Ampd Services Ltd. | London | 2025 |
| Amped Events Ltd | London | 2023 |
| Amped Fitness Ltd | Swaffham | 2023 |
| Amped Music Ltd | Prestonpans | 2026 |
| Amped UP AV Ltd | Peterborough | 2026 |
| Ampersand Inventions Community Interest Company | Gateshead | 2012 |
| Ampersand Music Limited | London | 1983 |
| Ampersand Projects CIC | Birmingham | 2016 |
| Ampersand SON Limited | London | 2008 |
| Ampersand Studios Ltd | London | 2015 |
| Ampersand& Ltd | London | 2025 |
| Ampersandalice Ltd | London | 2017 |
| Ampfield Par-Three Golf & Country Club Limited | Nr Romsey | 1963 |
| Amphibian and Reptile Conservation Trust | Bournemouth | 2009 |
| Amphibian Husbandry Ltd | Stocksfield | 2019 |
| Amphitheatre Racing Limited | London | 2022 |
| Amphonic Music Limited | London | 1971 |
| Amphora Design Ltd. | London | 1992 |
| Ampix Ltd | London | 2020 |
| Ample Aggression Productions Ltd | London | 2024 |
| Ample Space Studios Ltd | London | 2021 |
| Ampleform Limited | London | 1985 |
| Amplfy Coaching Ltd | Loughton | 2025 |
| Amplia Limited | Plymouth | 2023 |
| Amplif-I Energy Ltd | Altrincham | 2024 |
| Amplified Athlete Ltd | Manchester | 2022 |
| Amplified Entertainment Limited | London | 2026 |
| Amplified Productions Ltd | Suffolk | 2022 |
| Amplifive Music Ltd. | Bellshill | 2013 |
| Amplify Collective Ltd | London | 2026 |
| Amplify Events Group Ltd | Carlisle | 2026 |
| Amplify Fitness Ltd | London | 2025 |
| Amplify House Ltd | London | 2026 |
| Amplify Songs 131 Limited | Bristol | 2013 |
| Amplify Songs 1310 Limited | Bristol | 2013 |
| Amplify Songs 132 Limited | Bristol | 2013 |
| Amplify Songs 133 Limited | Bristol | 2013 |
| Amplify Songs 134 Limited | Bristol | 2013 |
| Amplify Songs 135 Limited | Bristol | 2013 |
| Amplify Songs 136 Limited | Bristol | 2013 |
| Amplify Songs 137 Limited | Bristol | 2013 |
| Amplify Songs 138 Limited | Bristol | 2013 |
| Amplify Songs 139 Limited | Bristol | 2013 |
| Amplify Songs 141 Limited | Bristol | 2014 |
| Amplify Songs 142 Limited | Bristol | 2014 |
| Amplify Songs 143 Limited | Bristol | 2014 |
| Amplify Songs 144 Limited | Bristol | 2014 |
| Amplify Songs 145 Limited | Bristol | 2014 |
| Amplify Songs 161 Limited | Bristol | 2016 |
| Amplify Songs 162 Limited | Bristol | 2016 |
| Amplify Songs 163 Limited | Bristol | 2016 |
| Amplify Songs 164 Limited | Bristol | 2016 |
| Amplify Songs 165 Limited | Bristol | 2016 |
| Amplify Wellness Club Ltd | London | 2025 |
| Amplitude Creative Limited | Nottingham | 2002 |