| Aircon Installations Limited | Leatherhead | 1992 |
| Aircon John & Sons Ltd | Merstham | 2026 |
| Aircon Mechanical Limited | Sheffield | 2021 |
| Aircon Services (Tamworth) Limited | Tamworth | 2008 |
| Aircon Sheet Metal Limited | Leicester | 2001 |
| Airconco Limited | Heywood | 2003 |
| Airconditioning Services Direct Limited | Weybridge | 2001 |
| Airconone (Halifax) Ltd | Halifax | 2012 |
| Airconserv Limited | Ballymena | 2011 |
| Aircontrol Southern Ltd | Southampton | 2013 |
| Aircooled Accessories Limited | Ashbourne | 2019 |
| Aircooled Tuning Limited | Arundel | 2012 |
| Aircooltech Ltd | Worcester Park | 2011 |
| Aircore Compressor Engineers Ltd | Plymouth | 2026 |
| Aircraft Access Limited | Bridgwater | 1989 |
| Aircraft Adventure Ltd | Cambridge | 2025 |
| Aircraft Air Handling Limited | Cotes Heath Stafford | 1998 |
| Aircraft Component Engineering Support Limited | Sudbury | 2001 |
| Aircraft Conversions (U.K.) Limited | London | 1982 |
| Aircraft Engine Management Group Limited | Berkhamsted | 2024 |
| Aircraft Engineering Services Limited | Stansted | 2018 |
| Aircraft Engineering Solutions Ltd | Cambridge | 2024 |
| Aircraft Engineers Limited | Prestwick | 2001 |
| Aircraft Ground Equipment Supply Limited | Bridgwater | 1987 |
| Aircraft in Miniature Limited | Warwickshire | 1989 |
| Aircraft Integrated Solutions Limited | London | 2015 |
| Aircraft Integrated Solutions Operations Ltd | London | 2019 |
| Aircraft Interior Refurbishment Ltd. | Bedford | 2017 |
| Aircraft Maintenance & Production Ltd | London | 2025 |
| Aircraft Maintenance Ltd | Royston | 2020 |
| Aircraft Maintenance Solutions Ltd | Bristol | 2009 |
| Aircraft Maintenance Support Ltd | Enfield | 2015 |
| Aircraft Medical Ltd. | Glasgow | 2001 |
| Aircraft Modification Solutions Limited | Porthcawl | 2024 |
| Aircraft Paint Protection Ltd. | Berkeley | 2016 |
| Aircraft Production Maintenance Services Ltd | Hull | 2012 |
| Aircraft Quality Services Limited | St. Ives | 2005 |
| Aircraft Seat Ltd | Dunstable | 2018 |
| Aircraft Simulation Services Limited | Crawley | 1997 |
| Aircraft Structure Done Ltd | Bridgend | 2025 |
| Aircraft Structures Ltd | Cambridge | 2025 |
| Aircraft Support Solutions Ltd | Stevenage | 2020 |
| Aircraft Technical Management Limited | Southampton | 2002 |
| Aircraft Technical Support Limited | Porthcawl | 2017 |
| Aircraft Tool Hire Limited | Vale Of Glamorgan | 2014 |
| Aircraftech Ltd | Leighton Buzzard | 2021 |
| Aircrafters Ltd | Lydney | 2024 |
| Aircrates Ltd | Wimborne | 2025 |
| Aircrew Apparel Limited | London | 2017 |
| Aircurtain Design Limited | Barnet | 2004 |
| Airdennis Ltd | Luton | 2015 |
| Airdrate Ltd | Brierley Hill | 2018 |
| Airdri Limited | Eynsham | 1974 |
| Airdrie Fabrications Ltd | Airdrie | 2018 |
| Airdrone Ltd | Irvine | 2020 |
| Airdropbox Limited | Maidstone | 2013 |
| Airduct Limited | North Humberside | 1991 |
| Airduct Manufacturing Limited | Kilmarnock | 2014 |
| Airductni Ltd | Dungannon | 2025 |
| Airducts Design Limited | Droitwich | 1998 |
| Airdugout Limited | Ruislip, | 2026 |
| Aire Concrete Limited | Leeds | 2017 |
| Aire Valley Architectural (Aluminium) Ltd | Keighley | 1994 |
| Aire Valley Cooling Ltd | Leeds | 2020 |
| Aire Valley Forge Keighley Limited | Bradford | 2024 |
| Aire Valley Forge Limited | Bradford | 2010 |
| Aire Valley Independent Traders Ltd | Colne | 2018 |
| Aire Valley Lift Service & Repair Limited | Bradford | 2015 |
| Aire Valley Metal Limited | Keighley | 2011 |
| Aire Valley Plant Repairs Ltd | Keighley | 2020 |
| Aire Valley Rewinds Limited | Leeds | 2010 |
| Aire-Tek Services Limited | Great Yarmouth | 2003 |
| Airebo Limited | Harrow | 2015 |
| Airedale Catering Equipment Limited | Bradford | 1985 |
| Airedale Ceramics Limited | Keighley | 2013 |
| Airedale Chemical Company Limited | Leeds | 1973 |
| Airedale Cooling Services Limited | Bradford | 1991 |
| Airedale Group Holdings Limited | Leeds | 2013 |
| Airedale International Air Conditioning Limited | Rawdon | 1974 |
| Airedale Springs Limited | Keighley | 1945 |
| Airedale Technical Services Limited | Bradford | 1994 |
| Aireye Ltd | Farnham | 2014 |
| Airfawn Consultants Limited | Stoke-On-Trent | 1988 |
| Airfield Concrete Ltd | York | 2022 |
| Airfield Lighting Systems Limited | Torfaen | 2003 |
| Airfield Productions Limited | Cornwall | 1997 |
| Airfirm Ltd | Cambridge | 2026 |
| Airfix Technical Services Ltd | Chichester | 2021 |
| Airflex Roto Ltd | Nottingham | 2025 |
| Airflo Fishing Products Limited | Brecon | 2019 |
| Airfloat Limited | Hadlow | 2003 |
| Airflow (Nicoll Ventilators) Limited | New Milton | 1972 |
| Airflow Developments Limited | High Wycombe | 1955 |
| Airflow Engineering Limited | Sheffield | 1983 |
| Airflow Environmental Limited | South Yorkshire | 2000 |
| Airflow Fabrication Services Limited | Croydon | 2008 |
| Airflow Measurements Limited | Manchester | 1973 |
| Airflow Products Limited | Sheffield | 2001 |
| Airflow Refrigeration Spacers Limited | Blackburn | 1986 |
| Airflow Streamlines Limited | Northampton | 2013 |