| Aquasky Limited | Kilmore | 1998 |
| Aquasol Trading Ltd | Birmingham | 2019 |
| Aquasola Ltd | Norwich | 2011 |
| Aquasource Products Limited | St. Helens | 2015 |
| Aquaspersions Limited | West Yorkshire | 1974 |
| Aquaspira Limited | Nelson | 2007 |
| Aquastan Heating Limited | Selby | 2002 |
| Aquaswim Services Limited | Northwood | 2007 |
| Aquatec Coatings Limited | Wrexham | 1999 |
| Aquatec Group Limited | Basingstoke | 1990 |
| Aquatec Subsea Limited | Basingstoke | 1999 |
| Aquatec Telemetry Limited | Basingstoke | 1998 |
| Aquatech Enterprises Limited | Partridge Green, Horsham | 2012 |
| Aquatech Pools Limited | Chertsey | 2006 |
| Aquatech Technologies Limited | Hyde | 2011 |
| AQUATECH2O Ltd | Bolton | 2012 |
| Aquateck Systems Ltd | Wallingford | 2025 |
| Aquaterra Energy (EBT Trustees) Limited | Park Norwich | 2006 |
| Aquaterra Energy Limited | Norwich | 2005 |
| Aquatest Limited | Battle | 2026 |
| Aquathena Ltd | London | 2024 |
| Aquatherapy Ltd | Droitwich | 2026 |
| Aquatherm Heat Transfer Limited | Pershore | 2014 |
| Aquatherm International Ltd | Watlington | 2007 |
| Aquatherm Services Limited | Harlow | 2005 |
| Aquatherm U.K. Limited | Gillingham | 2018 |
| Aquatic & Pets Limited | Leeds | 2003 |
| Aquatic Chemicals Ltd | Berkeley | 2016 |
| Aquatic Control Engineering Limited | Retford | 1995 |
| Aquatic Engineering Limited | Newport | 2008 |
| Aquatics South West Limited | Bovey Tracey | 2013 |
| Aquaticsen Limited | Beckenham | 2024 |
| Aquatiere Limited | Fareham | 2015 |
| Aquatint CHP Limited | London | 1990 |
| Aquatools Hygiene Limited | Wallingford | 2024 |
| Aquatools Limited | Dudley | 1974 |
| Aquatrol Pumping Services Limited | Sheringham | 2016 |
| Aquatrols Europe Ltd | London | 2009 |
| Aquatronic Group Management Limited | Henley-On-Thames | 1997 |
| Aquatronics Ltd | Lincoln | 2017 |
| Aquature Ltd | Ingatestone | 2022 |
| Aquavantage Limited | Truro | 1997 |
| Aquavibe Pro Limited | Crowborough | 2026 |
| Aquavision Distribution Limited | Blandford Forum | 2011 |
| Aquavita Cleaning Solutions Limited | Bradford | 2019 |
| Aquavitrum Ltd | Eastleigh | 2012 |
| Aquaweld Ltd | Oban | 2019 |
| Aquawood Ltd | Cambridge | 2025 |
| Aquazen Ltd | Epsom | 2026 |
| Aquazero Limited | Skegness | 2013 |
| Aquazoom Ltd | Milton Keynes | 2018 |
| Aquelife Co., Ltd | Beckenham | 2021 |
| Aqueous Irrigation Limited | Coventry | 2016 |
| Aqueous Logic Limited | Surrey | 1995 |
| Aquifolio Limited | Bristol | 2002 |
| Aquiko Limited | Retford | 2024 |
| Aquila Aeropower Ltd | Epsom | 2020 |
| Aquila Core AI Limited | London | 2025 |
| Aquila Electronics Limited | Newport | 1999 |
| Aquila Furniture Limited | Leigh | 2008 |
| Aquila Powder Coatings Limited | Cleckheaton | 2007 |
| Aquila Space and Defence Technologies Ltd | St. Andrews | 2019 |
| Aquila Switchgear Limited | London | 1992 |
| Aquila Visum Ltd | Witney | 2011 |
| Aquilar Limited | Esher | 2000 |
| Aquilo Heating Ltd | London | 2014 |
| Aquilux Wellness Ltd | Southport | 2025 |
| Aquinn Fencing and Property Services Ltd | London | 2023 |
| Aquino Coating Services Ltd | Cardiff | 2022 |
| Aquion Healthcare Ltd | Lichfield | 2026 |
| Aquios Labs Ltd | Milton Keynes | 2022 |
| Aquitab Ltd | Mildenhall | 2019 |
| Aquora Limited | London | 2023 |
| Aqura Ltd | Morden | 2026 |
| Aqura Systems Limited | Aberdeen | 2025 |
| Aqurate Engineering (Wales) Limited | Pontypool | 2023 |
| Aqurate Engineering(Scotland) Ltd | Glasgow | 2023 |
| Aqvr Ltd | Whitstable | 2025 |
| Aqzion Ltd | London | 2025 |
| AR & AM Ltd | St. Albans | 2025 |
| AR & I Services Limited | Kirkby Lonsdale | 2012 |
| AR Aero Ltd | Cambridge | 2024 |
| AR Aerospace Ltd | Carrickfergus | 2016 |
| AR Atelier Ltd | London | 2025 |
| AR Aviation Engineering Ltd | Aberdeen | 2022 |
| AR Brickwork & Construction Limited | Basildon | 2026 |
| AR Carpentry & Construction Limited | Cowes | 2024 |
| AR Catering Equipment Limited | Bradford | 2023 |
| AR Coffee Retail Ltd | Edinburgh | 2014 |
| AR Commissioning Services Limited | Hull | 2016 |
| AR Common UK Limited | Swansea | 2018 |
| AR Consortium Limited | Hertford | 2014 |
| AR Construction Marts Ltd | London | 2025 |
| AR Controls Ltd | Sunderland | 2013 |
| AR Crumlin Ltd | Crumlin | 2025 |
| AR Design Build Ltd | Ottery St. Mary | 2019 |
| AR Designs Limited | Brighton | 2002 |
| AR Dessert Supplies Limited | Birmingham | 2020 |
| AR Digital Limited | Newport | 2003 |
| AR Electrical Work Ltd | Redditch | 2019 |