| Air Alert Ltd | Warwick | 2026 |
| Air Aware Labs Ltd | London | 2024 |
| Air Black Box Company Ltd | London | 2012 |
| Air Broadband Limited | Cambridge | 2013 |
| Air Broadcasting Ltd | Dorchester | 2025 |
| Air Bubble Ltd | Romford | 2021 |
| Air Captured Media Limited | Mildenhall | 2023 |
| Air Claims Solutions Ltd | London | 2024 |
| Air Cloud Networks Limited | London | 2017 |
| Air Combat Live Ltd | London | 2026 |
| Air Communications Limited | Nottingham | 2023 |
| Air Cooled Apps Limited | Newton Abbot | 2024 |
| Air Development Consultancy Ltd | Croydon | 2026 |
| Air Dice Services (UK) Limited | Hessle | 2016 |
| Air Digitall Service Limited | London | 2025 |
| Air Education Limited | Doncaster | 2024 |
| Air FM Community Interest Company | Dorchester | 2012 |
| Air Forwarding International (LHR) Limited | Iver | 1986 |
| Air Ground Tactics Ltd | Esher | 2024 |
| Air Horn Limited | London | 2022 |
| Air HR Ltd | London | 2016 |
| Air Information Systems Limited | Barnsley | 2025 |
| Air Innovation Limited | London | 2014 |
| Air IT Group Limited | Nottingham | 2005 |
| Air IT Solutions Limited | Stoke-On-Trent | 2024 |
| Air Justice Ltd | London | 2021 |
| Air Lens Ltd | Cardiff | 2022 |
| Air Miles Recordings Limited | London | 2025 |
| Air Music Group Limited | Weybridge | 2025 |
| Air NET Services Limited | London | 2007 |
| Air News Ltd | London | 2026 |
| Air One Services Ltd | Kingston Upon Thames | 2016 |
| Air Paris Limited | London | 2026 |
| Air Photography Services Ltd | Cottered | 2020 |
| Air Pilot Publishing Limited | Abingdon | 2003 |
| Air Portal Ltd | London | 2019 |
| Air Power Publishing Ltd | Rugby | 2024 |
| Air Software Limited | Tamworth | 2014 |
| Air Street Films Limited | London | 2016 |
| Air Studios (Lyndhurst) Limited | Esher | 1990 |
| Air Telecom UK Limited | Crewe | 2009 |
| Air the Film Ltd | Uckfield | 2012 |
| Air Tight Edits Ltd | Whitley Bay | 2017 |
| Air Time Associates Ltd | Barrow-In-Furness | 2016 |
| Air Tips Solutions Ltd | London | 2025 |
| Air TNT Ltd | London | 2025 |
| Air Traffic Data Systems Ltd | Derby | 2025 |
| Air Traffic Management Laboratory Ltd | Bedford | 2024 |
| Air Tunnel Solutions Limited | London | 2014 |
| Air TV Group Limited | Church Fenton | 2020 |
| Air TV Ltd | Church Fenton | 2017 |
| Air Vision Pictures Limited | Barking | 2025 |
| Air Web Solutions Limited | Pinner | 2009 |
| Air+D Artificial Intelligence Retail & Design Ltd | Wendover | 2017 |
| Air-Britain (Trading) Limited | Haywards Heath | 2015 |
| Air-Britain Ltd | Staplefield | 2015 |
| Air-Style Media Limited | Tonbridge | 2020 |
| Air-Talk Solutions Limited | Chadwell Heath | 2021 |
| Air-Ua Ltd | London | 2022 |
| AIR2GROUND Ltd | Nantwich | 2019 |
| AIR4I Limited | Livingston | 2018 |
| Aira 6 Limited | London | 2015 |
| Aira Consulting Limited | London | 2025 |
| Aira Consulting Services Limited | Rugby | 2025 |
| Aira Services Limited | Derby | 2023 |
| Aira Systems Limited | Fairford | 2006 |
| Airaax Ltd | London | 2025 |
| Airably Limited | London | 2025 |
| Airacom Group Limited | London | 2019 |
| Airacom Limited | London | 2011 |
| Airaiz Limited | London | 2022 |
| Airaliz Group Ltd | London | 2025 |
| Airan UK Ltd | Harrow | 2018 |
| Airaphon Ltd | Tunbridge Wells | 2020 |
| Airasoul Ltd | Lytham St Annes | 2012 |
| Airathlon Limited | London | 2019 |
| Airavata Solutions Ltd | Glasgow | 2024 |
| Airayflow AI Ltd | London | 2025 |
| Airaz Limited | London | 2022 |
| Airaz UBA Limited | London | 2022 |
| AIRB4WIRE Limited | London | 2007 |
| Airband Community Internet Limited | Droitwich | 2009 |
| Airband Limited | Droitwich | 2011 |
| Airband Wireless Limited | Milton Keynes | 2025 |
| Airbase Ltd | Pulborough | 2018 |
| Airbear Productions Ltd | Kingston Upon Hull | 2015 |
| Airbeetle Limited | London | 2016 |
| Airblade Software Limited | Tunbridge Wells | 2006 |
| Airblaze Ltd | London | 2025 |
| Airborne HQ Careers Limited | London | 2025 |
| Airborne Platforms UK Ltd | Peterborough | 2015 |
| Airborne TV Ltd | London | 2025 |
| Airborne Visual Solutions Ltd. | Cardiff | 2016 |
| Airbot Technology Limited | Brighton | 2016 |
| Airbotics Limited | Newport-On-Tay | 2020 |
| Airbourne Limited | Poole | 2015 |
| Airbox Aerospace Limited | Wantage | 2016 |
| Airbox Data Services Limited | Wantage | 2017 |
| Airbox Media Limited | London | 2011 |
| Airboxe Ltd | London | 2026 |