| Air & Land Repatriation Services Limited | Horsham | 2022 |
| Air & Sea Rescue Limited | Harrogate | 2021 |
| Air 2 Air Limited | Berkhamsted | 2004 |
| Air 2 Air Solutions Limited | Maulden | 2021 |
| Air and General Finance Limited | London | 1976 |
| Air Brake Products Limited | West Bromwich | 2013 |
| Air Century Ltd | Bromley | 2024 |
| Air Charter Corporation Limited | Farnborough | 2006 |
| Air Charter Limited | Gatwick | 1997 |
| Air Conditioning Materials Ltd | St. Leonards-On-Sea | 2006 |
| Air Cooled Services Limited | Chippenham | 2022 |
| Air Cubed Limited | Keighley | 2019 |
| Air Digital Limited | Buckingham | 2011 |
| Air Environment Limited | Chatham | 2005 |
| Air Fine Art Ltd | Solihull | 2021 |
| Air Fuel Systems Limited | Basildon | 2013 |
| Air Halo Ltd | London | 2025 |
| Air Hire Ltd | Bristol | 2010 |
| Air LOG Limited | London | 1953 |
| Air Maintenance Limited | Eastleigh | 2005 |
| Air Nana Limited | Hounslow | 2013 |
| Air Regent Logistics UK Limited | Manchester | 2022 |
| Air Sale Ltd | Southwold | 2016 |
| Air Sea Freight Limited | Cheltenham | 2014 |
| Air Source Heat Limited | Basildon | 2012 |
| Air Sports Limited | London | 2008 |
| Air Street Consultants Ltd | Manchester | 2019 |
| Air Sylhet (UK) Limited | Handsworth | 2007 |
| Air Sylhet Europe Ltd | Handsworth | 2009 |
| Air Sylhet Ltd | Birmingham | 2007 |
| Air Travel Services Limited | London | 2007 |
| Air Turkey Limited | South Croydon | 2014 |
| Air-One Consulting Ltd | Dover | 2025 |
| AIR2G2 Ltd | Macclesfield | 2019 |
| Airbag MAN Limited | Surrey | 2004 |
| Airbles Assets (2) Limited | Salford | 2015 |
| Airbles Assets Limited | Salford | 2015 |
| Airborne Imaging Limited | Milton Keynes | 2015 |
| Airborne Industries Limited | Southend-On-Sea | 2007 |
| Airborne Visual Media Limited | Thatcham | 2024 |
| Airbourne Executive Ltd | Derby | 2023 |
| Airbourne Graphics and Signs Limited | Derby | 2021 |
| Airbus Sparrow Limited | Bristol | 2025 |
| Airco Limited | Hull | 2021 |
| Airco Property Holdings Limited | Hull | 1997 |
| Aircom Europe Limited | Lanarkshire | 2003 |
| Aircon Group Limited | Stockton-On-Tees | 2018 |
| Aircon Midlands Limited | West Midlands | 2004 |
| Airconsult Limited | East Grinstead | 2013 |
| Aircraft Braking Systems Europe Limited | Hemel Hempstead | 1980 |
| Aird Clachan Cottages Limited | Portstewart | 2000 |
| Aird Walker Limited | Kilmarnock | 2013 |
| Airdrie Properties Limited | Manchester | 2016 |
| Aire Logic EOT Limited | Leeds | 2022 |
| Aire Services Limited | Otley | 2003 |
| Aire Valley Property Services Ltd | Keighley | 2024 |
| Airedale Environmental Systems Ltd | Leeds | 2011 |
| Airedale Financial Services Ltd. | Keighley | 2009 |
| Airedale PFS Limited | Chorley | 2004 |
| Airedale Travel Limited | Ossett | 2015 |
| Airevalley Kitchens & Bathrooms Ltd | Keighley | 2010 |
| Airfast Engineering Services Limited | Stourbridge | 1976 |
| Airfield & Business Consultancy Limited | Tonypandy | 2025 |
| Airfield Lighting Systems UK Limited | Wickford | 2008 |
| Airfix Nordic Invest Limited | London | 2016 |
| Airfix Nordic Limited | London | 2016 |
| Airflow Building Products Limited | New Milton | 2007 |
| Airgse Ltd | York | 2016 |
| Airguntv Ltd | Bristol | 2012 |
| Airhop Germany Holdings Limited | London | 2019 |
| Airlink Global Travel Limited | Fleet | 2024 |
| Airman Engineering Services Limited | Billingham | 2001 |
| Airman Limited | London | 2016 |
| Airmaster Trustees Limited | Sheffield | 2021 |
| Airmix Technologies Limited | Annan | 2010 |
| Airmode Limited | Nelson | 2018 |
| Airoil-Flaregas Limited | Poole | 1980 |
| Airoseal Limited | Liverpool | 2008 |
| Airota Limited | Belfast | 2017 |
| Airow Defence Deployment Limited | Chester Le Street | 2014 |
| Airparks Services (East Midlands) Limited | Kent | 1993 |
| Airport Bearing Company Limited | Nottingham | 2024 |
| Airport Concierge Ltd. | Hayes | 2003 |
| Airport Direct Leicester Limited | Leicester | 2009 |
| Airport Direct Parking Limited | Exeter | 2011 |
| Airport Link Taxis Limited | King'S Lynn | 2002 |
| Airport Logistics Ltd | London | 2014 |
| Airport Parking Limited | Bournemouth | 1996 |
| Airport Runner Ltd | Londonderry | 2025 |
| Airport Taxis Limited | Cheddar | 2025 |
| Airport Transfer Grantham Ltd | Doncaster | 2023 |
| Airport Transfers Falkirk Ltd. | Larbert | 2010 |
| Airport Transfers Ltd. | Prestwick | 2005 |
| Airports R US Limited | Newcastle | 2023 |
| Airpowder Ltd | Henfield | 2008 |
| Airpure Trademark Limited | Manchester | 2016 |
| Airquoter Limited | Harrogate | 2024 |
| Airsafe Limited | Reading | 2000 |
| Airscan Drone Services Ltd | Oxted | 2025 |
| Airsmart Limited | Manston | 2006 |