| Aniara Film Ltd | London | 2020 |
| Aniara Ltd | London | 2019 |
| Anibles Ltd | East Grinstead | 2022 |
| Anika Crane Fitness Ltd | Caerphilly | 2022 |
| Anika DE Souza Creative Studio Ltd | Cheam | 2022 |
| Aniko's Dance Academy Ltd | Leighton Buzzard | 2016 |
| Anikst Design Limited | London | 2005 |
| Anil Agarwal Riverside Studios Trust | London | 2024 |
| Anil Mistry Ltd | Lancing | 2013 |
| Anilove Catering Service Limited | Croydon | 2011 |
| Anima Gymnastics Club Ltd | Hitchin | 2021 |
| Anima House Limited | Leeds | 2019 |
| Anima Music Ltd | Glasgow | 2025 |
| Anima SOL Ltd | Glasgow | 2021 |
| Animaio Studio Ltd | Cardiff | 2025 |
| Animal Antics (NE) Limited | Gateshead | 2010 |
| Animal Bones Ltd | Birmingham | 2024 |
| Animal Crew Ltd | Carnforth | 2015 |
| Animal FU Limited | Somerset | 2014 |
| Animal Head Ltd | London | 2022 |
| Animal Lottery Foundation CIC | Newcastle Upon Tyne | 2026 |
| Animal Magic Pony Parties Limited | Didcot | 2006 |
| Animal Party Ltd | Doncaster | 2021 |
| Animals & Birds Limited | Uxbridge | 2024 |
| Animals - Remembered Association | Cardiff | 2010 |
| Animals Actually Ltd | Wembley | 2013 |
| Animals at Home (Torbay & District) Ltd | Paignton | 2009 |
| Animals Galore Limited | Heathfield | 2005 |
| Animate & Create Studios Limited | Margate | 2010 |
| Animate Projects Limited | Derby | 2019 |
| Animate Theatre Company CIC | Torpoint | 2016 |
| Animated Expressions Limited | Chelmsford | 1986 |
| Animated Objects Community Arts Limited | Scarborough | 2013 |
| Animated Objects Ltd | Scarborough | 2013 |
| Animated Physiotherapy Ltd | Basildon | 2018 |
| Animation International Ltd | London | 2024 |
| Animation Station Ltd | Banbury | 2010 |
| Animator Guild Limited | Harrow | 2021 |
| Animatronics Ltd | Bromley | 2019 |
| Anime Manga Events Ltd | Ruislip, | 2024 |
| Anime Tattcon NI Ltd | Craigavon | 2024 |
| Animo Motion Graphics Limited | London | 2012 |
| Animoo Art Ltd | Spalding | 2021 |
| Animoso Creations Limited | Glasgow | 2004 |
| Anina BEA Creative Ltd | London | 2023 |
| Aniseed Creative Ltd | Team Valley Trading Estate | 2020 |
| Anish Kapoor Foundation | London | 2017 |
| Anisometric Limited | London | 2001 |
| Anita Beardsley Limited | Bishop Sutton | 2014 |
| Anita Bell Associates Limited | London | 2006 |
| Anita K Ltd | Waltham Abbey | 2018 |
| Anita Ryan Events Limited | Manchester | 2025 |
| Anjali Dance Company Limited | Nottingham | 2012 |
| Anjanque Designs Ltd | Tonbridge | 2024 |
| Anka Limited | London | 2025 |
| Anker Valley Canoe Club Limited | Nuneaton | 1987 |
| Anlaby Properties Limited | Cottingham | 2017 |
| ANM Automotive Limited | Manchester | 2022 |
| ANM2 Limited | London | 2013 |
| Anmax Leisure Limited | Plymouth | 2014 |
| ANN Barnard Limited | East Sussex | 2002 |
| ANN Carrington Limited | Herne Bay | 2013 |
| Ann-Aniedi Asikpo Studio Limited | London | 2026 |
| Anna Alverez Compania | Southwick | 2024 |
| Anna and the Apocalypse Ltd | Glasgow | 2016 |
| Anna Barnett Cooks Limited | Bristol | 2013 |
| Anna Barr Interiors Ltd. | Edinburgh | 2015 |
| Anna Beau Studio Ltd | London | 2024 |
| Anna Booth Limited | London | 2002 |
| Anna Butterfield Limited | Falmouth | 2012 |
| Anna Coroneo Ltd | Shrewsbury | 2012 |
| Anna D. Lascsik Ltd. | Redhill | 2017 |
| Anna Demetriou Limited | Cockfosters | 2024 |
| Anna Dovbiy Ltd | London | 2024 |
| Anna Edwards Sport Horses Limited | Taunton | 2010 |
| Anna Gammans Art Ltd | London | 2024 |
| Anna Hopkin Performance Limited | Ipswich | 2021 |
| Anna Hursey Sports Management Limited | Waltham Cross | 2019 |
| Anna Kathryn Lynch Limited | Chorley | 2023 |
| Anna KAY Cycling Limited | Prudhoe | 2020 |
| Anna Kessel Ltd | Doncaster | 2025 |
| Anna L Dumicz Ltd | Cheddar | 2018 |
| Anna Lingis Ltd | London | 2018 |
| Anna Mckeever Art Ltd | Belfast | 2021 |
| Anna Morrison Design Limited | Brentford | 2022 |
| Anna Moutrey Production Ltd | Manchester | 2026 |
| Anna Passey Limited | Warrington | 2015 |
| Anna Robinson Ltd | Newcastle Upon Tyne | 2022 |
| Anna Scott Productions Ltd | Tunbridge Wells | 2026 |
| Anna Stephenson Ltd | Ware | 2019 |
| Anna Sudbina Studio Limited | London | 2025 |
| Anna TAM Ltd | London | 2024 |
| Anna Taylor Ltd | Glasgow | 2025 |
| Anna Trevelyan Limited | Borehamwood | 2013 |
| Anna Valley Limited | London | 1989 |
| Anna WAZ Styling Limited | Ringwood | 2020 |
| Anna Whitehouse Ltd | London | 2024 |
| Anna Williamson Limited | Hoddesdon | 2007 |
| Anna's Place Wellbeing Events & Services Ltd | Fareham | 2025 |
| Anna's Wings Limited | Blackburn | 2025 |