| Anther Media Ltd | London | 2023 |
| Anthers Group Limited | Bathgate | 2022 |
| Anthesis Group Limited | Congleton | 2019 |
| Anthesis Limited | Congleton | 2009 |
| Antheus Telecom Limited | Exeter | 2005 |
| Anthian Computer Systems Ltd | London | 2012 |
| Anthiax Ltd | London | 2025 |
| Anthill Consultancy Ltd | Pinner | 2022 |
| Anthill Mews Ltd | Walsall | 2019 |
| Anthill Networks Limited | Luton | 2025 |
| Anthill Software Limited | Leeds | 2011 |
| Anthillhost Limited | London | 2026 |
| Anthiz Group Ltd | Manchester | 2025 |
| Anthmonic Ltd | Milton Keynes | 2025 |
| Antho Group Limited | London | 2025 |
| Antho IT Ltd | Taunton | 2025 |
| Anthoc Ltd | Kettering | 2025 |
| Antholin Ltd | Edgware | 2023 |
| Anthology Estates Ltd | Petersfield | 2019 |
| Anthology Limited | Chippenham | 1997 |
| Anthology Partners Ltd | Newbury | 2007 |
| Anthology Publishing Limited | Faversham | 2019 |
| Anthology Reimagined Ltd | London | 2025 |
| Anthonite Ltd | Liverpool | 2022 |
| Anthony & Anthony Limited | Frinton-On-Sea | 2022 |
| Anthony & Anthony Precision Limited | Frinton-On-Sea | 2026 |
| Anthony Barkworth Knight Limited | Levenshulme | 2018 |
| Anthony Blanco Limited | Richmond | 2018 |
| Anthony Bryan Ltd | Havant | 2023 |
| Anthony Campbell Creative Ltd | Redbourn | 2020 |
| Anthony Charlington Mentorship Ltd | London | 2022 |
| Anthony Creative Enterprises Limited | Brighton | 1996 |
| Anthony Daniels Consultancy Limited | London | 2023 |
| Anthony Edits Limited | King'S Lynn | 2016 |
| Anthony Hall Productions Ltd | London | 2023 |
| Anthony Hiley Consulting Limited | London | 2016 |
| Anthony Hull Limited | Stevenage | 2016 |
| Anthony James Consulting Limited | Epsom | 2013 |
| Anthony James Music Limited | London | 2022 |
| Anthony Jarvis VFX Limited | London | 2017 |
| Anthony JM Wood Limited | Whitehills Business Park | 2017 |
| Anthony Jones Telecommunications Ltd | Dudley | 2019 |
| Anthony Lauderdale Ltd | London | 2024 |
| Anthony MAY Ltd | Darlington | 2023 |
| Anthony Mckernan Limited | Whitehills Business Park | 2018 |
| Anthony Media Co Ltd | Wellingborough | 2022 |
| Anthony Murdoch Limited | Glasgow | 2011 |
| Anthony Riera Limited | London | 2018 |
| Anthony Rose Limited | Surrey | 1996 |
| Anthony Royd Ltd | Kington | 2024 |
| Anthony Ryan Media Limited | Sheffield | 2023 |
| Anthony Seldon Ltd | London | 2014 |
| Anthony Shamimi Ltd | Woodford Green | 2015 |
| Anthony Simon Enterprises Limited | Pershore | 1987 |
| Anthony Swords Ltd | London | 2019 |
| Anthony Walker Ltd | Bolton | 2023 |
| Anthony Z Studio Ltd | London | 2015 |
| Anthony's Prose Press Limited | Chessington | 2024 |
| Anthonydodge.Tv Limited | Chippenham | 2015 |
| Anthonyis Limited | Truro | 2017 |
| Anthopec Ltd | Norwich | 2017 |
| Anthor Ltd. | Rugeley | 2014 |
| Anthoweb Limited | Hitchin | 2015 |
| Anthowise Ltd | Orpington | 2025 |
| Anthracite Technologies Ltd. | Mildenhall | 2023 |
| Anthracyte Ltd | Kington | 2025 |
| Anthriscus Vulgare Ltd | Bury | 2024 |
| Anthro Intelligence Ltd | Esher | 2025 |
| Anthrolytics Ltd | London | 2021 |
| Anthronova Ltd | London | 2025 |
| Anthronovaai Limited | High Wycombe | 2025 |
| Anthropic Limited | London | 2023 |
| Anthropics Technology Limited | Gloucester | 1998 |
| Anthropinos Consultancy Ltd | Bolton | 2016 |
| Anthropocentric Ltd | Leeds | 2017 |
| Anthropogenic Intelligence Limited | Leeds | 2023 |
| Anthropolo Ltd | Salford | 2026 |
| Anthropologie Japan Limited | Milton Keynes | 2011 |
| Anthropologie New Media Limited | | 2007 |
| Anthropometric Ltd | Hamilton | 2024 |
| Anthropos Digital Care Limited | St. Albans | 2016 |
| Anthropy Ltd | Shrewsbury | 2020 |
| Anthrospecs Ltd | London | 2026 |
| Anthurium DEV Ltd | Belfast | 2024 |
| Anthus Consulting Limited | Bury St. Edmunds | 2024 |
| Anthyra Systems Limited | London | 2026 |
| Anti (Design Services) Limited | Todmorden | 2006 |
| Anti Ageing and Longevity Fellowship Ltd | London | 2025 |
| Anti Anti Ltd | London | 2019 |
| Anti Audio Ltd | London | 2026 |
| Anti Graffiti Spray Limited | Birmingham | 2017 |
| Anti Kino Endeavour Ltd | London | 2020 |
| Anti Kino Ltd | London | 2024 |
| Anti Kino Stravaganza Ltd | London | 2022 |
| Anti Records Ltd | Bromley | 2022 |
| Anti-Blur Limited | London | 2018 |
| Anti-Corruption Advisory Limited | Brighton | 2017 |
| Anti-Hero Films Ltd | Belfast | 2011 |
| Anti-Phishing Volunteers & Associates Ltd | London | 2023 |
| Anti-Real Media Ltd | Brighton | 2022 |