| Airu LI Limited | London | 2023 |
| Airuh Ltd | London | 2026 |
| Airv Translations Ltd | Harrow | 2016 |
| Airvagreen Limited | Cardiff | 2024 |
| Airvana Ltd | London | 2025 |
| Airvantage Drones Ltd | Andover | 2022 |
| Airvaro Ltd | Gerrards Cross | 2023 |
| Airvent Design and Installation Limited | Leamington Spa | 2014 |
| Airventure Ltd | Ballindalloch | 2008 |
| Airvine Limited | London | 2014 |
| Airvis Ltd | Manchester | 2015 |
| Airvision UK Ltd. | Ilkley | 2014 |
| Airvo Ltd | Stoke On Trent | 2026 |
| Airvolute Limited | Chorley | 2026 |
| Airvolve Limited | Hounslow | 2025 |
| Airwair (1994) Limited | Northamptonshire | 1993 |
| Airwair (1996) Limited | Northamptonshire | 1996 |
| Airwair Limited | Northamptonshire | 1988 |
| Airwaterland Compliance Ltd | Iver | 2025 |
| Airwave Solutions International Limited | London | 2008 |
| Airwaves Aviation Consultancy Limited | Horley | 2024 |
| Airwell Measurements Limited | Warrington | 1990 |
| Airwoolf Limited | London | 2008 |
| Airworthiness & Compliance Support Services Ltd | Limpsfield | 2016 |
| Airworthiness Limited | Newcastle Upon Tyne | 2026 |
| Airworthiness Solutions Ltd | Trowbridge | 2024 |
| Airworthy Consulting Ltd | St. Ives | 2024 |
| Airworthy Limited | Farnham | 1980 |
| Airworthy Trustees Limited | Farnham | 2017 |
| Airworx Ltd | Newcastle Upon Tyne | 2015 |
| Airyhall Commercial Services Limited | Aberdeen | 2016 |
| AIS Accountants Limited | London | 2013 |
| AIS Assistant Ltd | Hitchin | 2026 |
| AIS Book Keeping Services Limited | London | 2023 |
| AIS Consultancy Limited | London | 2026 |
| AIS Engineering Consulting Ltd | Newtownabbey | 2020 |
| AIS Europe Limited | Wolvercote | 2025 |
| AIS Insure Ltd | London | 2020 |
| AIS Legal Services Limited | Ilford | 2024 |
| AIS London Limited | London | 2012 |
| AIS Management Services Limited | 34A Waterloo Road | 2014 |
| AIS Surveyors Ltd | Darlington | 1997 |
| AIS Survivex Limited | Christchurch, Dorset | 2021 |
| AIS Vets Limited | Chelmsford | 2009 |
| Aisa Law Limited | Stoke-On-Trent | 2023 |
| Aisake Ltd | Eastbourne | 2014 |
| Aisata Ltd | London | 2024 |
| Aiscension.Ai Limited | London | 2019 |
| Aiscent Skills Limited | Huddersfield | 2025 |
| Aisense Marketing Ltd | Southampton | 2025 |
| Aisetas Limited | Cobham | 2018 |
| Aisg Finance and Accounting Ltd | London | 2026 |
| Aisg Limited | Ely | 2004 |
| Aish Consulting Limited | Cardiff | 2011 |
| Aish Electro-Mechanical Services Limited | Poole | 2004 |
| Aisha Accounting Services Ltd | Cambridge | 2025 |
| Aisha Associates Limited | Barking | 2012 |
| Aisha Bennett Collective Ltd | Halifax | 2026 |
| Aisha Consult Limited | Bromley | 2014 |
| Aisha Legal Ltd | Erdington | 2024 |
| Aisha Sanusi Ltd | London | 2024 |
| Aisha&Co Accountants Ltd | Romford | 2021 |
| Aishahcreates Limited | Ashton-Under-Lyne | 2025 |
| Aishaz Marketing Services Ltd | High Wycombe | 2018 |
| Aishi Enterprises Ltd | Birmingham | 2023 |
| Aishladi Ltd | London | 2024 |
| Aishling Mcloughlin Consultancy Limited | Borehamwood | 2013 |
| Aishow Consulting Ltd | Erith | 2023 |
| Aisight Global Ltd | Halifax | 2023 |
| Aisimholdings Limited | Rugby | 2025 |
| Aisis Limited | Bristol | 2000 |
| Aisk Ltd | Watford | 2026 |
| Aisla Consulting Ltd | Coalville | 2025 |
| Aisle 5 Ltd | London | 2025 |
| Aisle 8 Holdings Limited | London | 2014 |
| Aisle 8 Limited | London | 2023 |
| Aisle and Beyond Ltd | East Grinstead | 2021 |
| Aisle and VOW Ltd | London | 2021 |
| Aisle to Album Ltd | Manchester | 2026 |
| Aisling Bremner Marketing Limited | Magherafelt | 2021 |
| Aisling Callaghan Consulting Limited | North Berwick | 2015 |
| Aisling Consultancy Limited | Laurencekirk | 2010 |
| Aisling Cronin Ltd | London | 2023 |
| Aisling Limited | Durham | 2021 |
| Aisling O'Keeffe Medical Writing Limited | Wantage | 2016 |
| Aisling Ventures Limited | Birmingham | 2026 |
| Aisma Limited | Wilmslow | 2000 |
| Aisosa Group Ltd | London | 2026 |
| Aispirant Limited | Weybridge | 2019 |
| Aispire Analytics Limited | Leicester | 2025 |
| Aist Energy Systems Ltd | London | 2020 |
| Aistate Management Limited | Winchester | 2025 |
| Aisthesis Medical Limited | London | 2024 |
| Aiston Surveyors Ltd | Barnet | 2005 |
| Aistone Properties (Leaseholds) Limited | Swindon | 2006 |
| Aistreet Agency Ltd | London | 2021 |
| Aistute Limited | Mildenhall | 2025 |
| Aisuk Ltd | Birkenhead | 2019 |
| Aisuno Consulting Limited | Kirkintilloch | 2014 |
| Aisyah Zain Productions Ltd | Luton | 2025 |