| Airo Group Holdings Limited | London | 2023 |
| Airo IAQ Technologies Limited | London | 2023 |
| Airofly Evtol Ltd | London | 2019 |
| Airone Group Limited | London | 2022 |
| Airoya Beauty Ltd | Borehamwood | 2025 |
| Airparks Services (Birmingham) Limited | Kent | 1994 |
| Airparks Services Limited | Birmingham | 1991 |
| Airpets Limited | Staines | 1966 |
| Airport Cars Services Ltd | Woking | 2021 |
| Airport Cheap Parking Ltd | London | 2023 |
| Airport City Church C.I.C. | Burton-On-Trent | 2025 |
| Airport Connections Ltd | Croydon | 2007 |
| Airport Dimensions Holdings Limited | London | 2018 |
| Airport Extras Ltd | Hayes | 2019 |
| Airport Hills Ltd | Darlington | 2011 |
| Airport Operators Association Ltd. | London | 1972 |
| Airport Park Birmingham Ltd | Luton | 2023 |
| Airport Park Luton Ltd | Luton | 2023 |
| Airport Park Manchester Ltd | Luton | 2023 |
| Airport Park With US Limited | Styal | 2023 |
| Airport Parking Group Ltd | Luton | 2024 |
| Airport Parking Luton Express Limited | Luton | 2023 |
| Airport Parking Manchester Ltd | Luton | 2023 |
| Airport Parkwise Ltd | Ilford | 2026 |
| Airport Services International Limited | Manchester | 2018 |
| Airport Travel Plus Limited | Walsall | 2020 |
| Airport VIP Services Limited | Hayes | 2009 |
| Airportparkingcompare Limited | Slough | 2019 |
| Airportr Technologies Ltd | London | 2012 |
| Airportsuktravel Limited | High Wycombe | 2014 |
| Airportwings Ltd | London | 2016 |
| Airr Digital Ltd | Stoke-On-Trent | 2023 |
| Airr Plus Limited | Surbiton | 2024 |
| Airra Limited | Broadstairs | 2023 |
| Airrevive Ltd | London | 2025 |
| Airrigation Ltd | Milton Keynes | 2024 |
| Airsalon Limited | Hemel Hempstead | 2013 |
| Airsave Travel Ltd | Aylesbury | 2012 |
| Airsculpture Therapy Ltd. | London | 2021 |
| Airship Association Limited (the) | London | 1971 |
| Airshot Services UK Ltd | Haverhill | 2022 |
| Airside Active Ltd | Peterborough | 2025 |
| Airside Andy Holdings Limited | Surbiton | 2013 |
| Airside Andy Limited | Surbiton | 2009 |
| Airskyways Limited | Borehamwood | 2021 |
| Airspan Ltd | Ludlow | 2023 |
| Airsports Insurance Bureau Limited | Reading | 1993 |
| Airstore Limited | Birmingham | 2013 |
| Airstream Leisure Limited | Bognor Regis | 1999 |
| Airtang Ltd | Leicester | 2025 |
| Airtang Partners Ltd | Leicester | 2025 |
| Airtear Ltd | Teddington | 2017 |
| Airtech (Service & Maintenance) Limited | East Grinstead | 1982 |
| Airth Station Cattery Ltd | Falkirk | 2013 |
| Airth Station Kennels Ltd | Stirlingshire | 2006 |
| Airthrill (Scotland) Ltd | Motherwell | 2021 |
| Airto Limited | London | 1975 |
| Airvending Limited | Wigan | 1984 |
| Airwars | Exeter | 2016 |
| Airway Compressors Ltd | Craven Arms | 2026 |
| Airwork Limited | London | 1936 |
| Airworld Limited | London | 1984 |
| Airworx A.C.R. Limited | London | 2012 |
| AIS Aviation Ltd | St. Asaph | 2013 |
| AIS Fire and Security Limited | Edinburgh | 2019 |
| AIS Plus Limited | Higherford | 2010 |
| AIS Security Systems Ltd | Edinburgh | 2017 |
| Aiscalpshading Ltd | Brentwood | 2025 |
| Aiscout Ltd | Witham | 2026 |
| Aish Bhatti Ltd | Broughton | 2023 |
| Aish Birmingham Limited | Birmingham | 2021 |
| Aisha Ahmada Ltd | London | 2021 |
| Aisha Arshad Associates Limited | Leicester | 2009 |
| Aisha Beauty and Hair Salon Limited | Barking | 2026 |
| Aisha Beauty Ltd | Hounslow | 2018 |
| Aisha Beauty Saloon Ltd | Blackpool | 2025 |
| Aisha Consultancy Ltd | Altrincham | 2025 |
| Aisha Essa Ltd | Coventry | 2026 |
| Aisha Hair & Beauty Limited | Glasgow | 2019 |
| Aisha Hair Ltd | Chatham Kent | 2023 |
| Aisha's Gifts Ltd | London | 2024 |
| Aishairbeauty Limited | Glasgow | 2024 |
| Aishi Beauty Ltd | Wembley | 2025 |
| Aisle of Style Barber Ltd | Newport | 2019 |
| Aisling Events Limited | Belfast | 2013 |
| Aisling Fleur Ltd | London | 2022 |
| Aisma Education Ltd | London | 2025 |
| Aismicro Ltd | Glasgow | 2025 |
| Aisnail Ltd | Glasgow | 2025 |
| Aisodiso Ltd | Cardiff | 2025 |
| Aisst Ltd | Radlett | 2014 |
| Aiste's Promotion Ltd | Colchester | 2015 |
| Aisthetics Ltd | Potters Bar | 2021 |
| AIT Associate Ltd | London | 2021 |
| AIT Colorsolve Limited | Sevenoaks | 2012 |
| AIT Jetcare Limited | West Malling | 2012 |
| Aitbop Limited | Leicester | 2025 |
| Aite Atelier Limited | London | 2025 |
| AITHERCO2 Ltd | London | 2010 |
| Aitken's Barbers Limited | Larkhall | 2026 |