| Aquabullet Ltd | Guildford | 2025 |
| Aquacaptech Ltd | Twickenham | 2025 |
| Aquacast Limited | Milnsbridge | 1989 |
| Aquacat Boats Ltd | Southampton | 2024 |
| Aquacheck Engineering Limited | Blackburn | 2009 |
| Aquachem Ltd | Rotherham | 2023 |
| Aquacopia Ltd | Mansfield | 2024 |
| Aquacover Limited | Alfreton | 2002 |
| Aquacrest (UK) Limited | Grimsby | 1995 |
| Aquacrop(Uk)Crop Nutrition & Health Ltd | Bury St. Edmunds | 2026 |
| Aquaculture Equipment Limited | Manchester | 2002 |
| Aquacut Limited | Warrington | 1998 |
| Aquadia Jewellery Ltd | Manchester | 2025 |
| Aquadrill Ltd | Maidenhead | 2002 |
| Aquaeducta Limited | Hertford | 2026 |
| Aquafabs Limited | Nr Welford | 2004 |
| Aquafactors Ltd | Basingstoke | 2012 |
| Aquafarm Equipment (Scotland) Limited | Glasgow | 2018 |
| Aquafil UK Limited | Kilbirnie | 2014 |
| Aquaflame GAS Services Limited | Lichfield | 2007 |
| Aquaflames Daventry Limited | Northampton | 2022 |
| Aquaflames Spas Limited | Daventry | 2015 |
| Aquafleece Limited | Okehampton | 2006 |
| Aquaflex Limited | Salisbury | 1993 |
| Aquaflux Limited | Chester | 2007 |
| Aquafoil Ltd | Shipley | 2023 |
| Aquaforte Solutions Limited | Evesham | 2026 |
| Aquafun Sheffield Limited | Sheffield | 2010 |
| Aquagarden Interpet Ltd | Taunton | 2025 |
| Aquagas Plumbing and Heating Solutions Ltd | Barnsley | 2008 |
| Aquagems Limited | London | 2024 |
| Aquagen Energy Ltd | Birmingham | 2023 |
| Aquagrain Limited | Ipswich | 2016 |
| Aquaguard Pumps Ltd | Telford | 2021 |
| Aquaheat (Lytham) Limited | Lytham St. Annes | 2016 |
| Aquaholix Ltd | London | 2024 |
| Aquajet Cleaning Equipment Limited | Needham Market | 2002 |
| Aquajet Machining Systems Limited | Chorley | 1995 |
| Aqualand Industries (Products) Limited | Wakefield | 2023 |
| Aqualand Industries Limited | Wakefield | 2018 |
| Aqualand Limited | Leeds | 1992 |
| Aqualase Limited | London | 2025 |
| Aqualeak Detection Limited | Corsham | 2008 |
| Aqualess Ltd | Barnsley | 2022 |
| Aqualift Marine Limited | Brierley Hill | 2020 |
| Aqualine Marine Limited | Droitwich | 2002 |
| Aqualine Pipe Systems Ltd | London | 2025 |
| Aqualisa Products Limited | Kent | 1976 |
| Aqualite Outdoor Displays Ltd | London | 2026 |
| Aqualite Outdoor Ltd | London | 2024 |
| Aqualithium International Ltd | Horsforth | 2008 |
| Aquality Pool Service Limited | Hungerford | 2024 |
| Aqualogic NT Limited | Glasgow | 2012 |
| Aqualona Products Limited | London | 1973 |
| Aqualution Limited | Plymouth | 2026 |
| Aqualution Systems Ltd | Alnwick | 2000 |
| Aqualux Management Ltd | Sturminster Newton | 2023 |
| Aquam Liberum Ltd | Rickmansworth | 2025 |
| Aquamare Marine Ltd | Exeter | 2009 |
| Aquamate Products Ltd | Thaxted Dunmow | 1998 |
| Aquamatic Limited | Manchester | 1991 |
| Aquameter Limited | Borehamwood | 1990 |
| Aquamotive Limited | Ayr | 2007 |
| Aquannah Ltd | Birkenhead | 2025 |
| Aquantic Logie Fish Counters Ltd | Winsford | 2018 |
| Aquantis Tidal TEN Limited | Hexham | 2024 |
| Aquanua Ltd | Heathfield | 2018 |
| Aquapak Hydropolymers Ltd | Kings Norton | 2011 |
| Aquapak Polymers Ltd | Manchester | 2005 |
| Aquaplane Holdings Limited | Cheltenham | 2021 |
| Aquaplasma Ltd | Waterlooville | 2026 |
| Aquaply Ltd | London | 2025 |
| Aquapod Limited | London | 2004 |
| Aquaprana Ltd | London | 2026 |
| Aquaprintuk Limited | Warrington | 2021 |
| Aquapure Filtration Systems Ltd | Norwich | 2025 |
| Aquapurge Limited | Hayes | 1997 |
| Aquarelle Interior Decor Ltd | Hamilton | 2018 |
| Aquarian Spring Media Ltd | Paisley | 2025 |
| Aquarium Studios Limited | London | 1997 |
| Aquarium Technology Limited | Weymouth | 1996 |
| AQUARIUMS4LIFE Ltd | Preston | 2013 |
| Aquarius Canal Boat Builders Ltd | Liverpool | 2019 |
| Aquarius Creative Limited | Foston | 2003 |
| Aquarius Interiors Limited | Kenilworth | 2014 |
| Aquarius Manufacturing Limited | Blackburn | 1999 |
| Aquarius Rail Ltd | Ripon | 2020 |
| Aquarius Railroad Technologies Limited | Ripon | 1999 |
| Aquarius Wireless Solutions Limited | Basingstoke | 2026 |
| Aquasave Ltd | Lutterworth | 2018 |
| Aquascan International Limited | Newport | 1982 |
| Aquascot Limited | Alness | 2004 |
| Aquascutum International Licensing Limited | London | 2009 |
| Aquaseal Rubber Limited | Newcastle Upon Tyne | 1992 |
| Aquasei Ltd | Colchester | 2024 |
| Aquasentry Ltd | Larkfield | 2016 |
| Aquasign Limited | Aberdeen | 2015 |
| Aquasign Markers Limited | Loriston | 1996 |
| Aquasium Limited | Cambridge | 1995 |
| Aquasium Technology Limited | Cambridge | 2001 |