| Aqua Boracay by YOO Limited | London | 2013 |
| Aqua Bright Solutions Limited | London | 2024 |
| Aqua Business Consultants Limited | Dunstable | 2014 |
| Aqua Callidus Consulting Ltd | Fareham | 2018 |
| Aqua Caloratus Limited | London | 2023 |
| Aqua Carbon Ltd | Winchester | 2018 |
| Aqua Catalysis Limited | Sale | 2023 |
| Aqua Computer Systems Ltd | | 2002 |
| Aqua Consultancy Limited | London | 2025 |
| Aqua Consulting Limited | Bath | 2005 |
| Aqua Creations Limited | Liverpool | 2018 |
| Aqua Creator Network Ltd | Ilminster | 2025 |
| Aqua CUT UK Ltd | Dartford | 2004 |
| Aqua Cyclus Ltd | Inverness | 2025 |
| Aqua Data Ltd | Poole | 1988 |
| Aqua Design Landscaping Limited | Camberley | 2024 |
| Aqua Digital Limited | London | 2026 |
| Aqua Docs Ltd | Kington | 2026 |
| Aqua Dynamics Process Technology Limited | London | 2000 |
| Aqua Electrical & Mechanical Water Engineering Services (Scotland) Ltd | Coatbridge | 2017 |
| Aqua Engineering Ltd | Edgware | 2024 |
| Aqua Engineering Services Ltd | Stevenage | 2025 |
| Aqua Environment Solutions Ltd | Wetherby | 2023 |
| Aqua Flow Engineering Limited | London | 2026 |
| Aqua Force Holdings Limited | Bilston | 2024 |
| Aqua Forum Ltd | Barking | 2023 |
| Aqua Gear Technology Limited | Hull | 2018 |
| Aqua Group Ltd | Rotherham | 2018 |
| Aqua Holdings Limited | Smethwick | 1994 |
| Aqua Horizon Ltd | Coventry | 2020 |
| Aqua Hydraulics Limited | Salisbury | 1999 |
| Aqua I Products Limited | Rowley Regis | 2019 |
| Aqua Insight Ltd | London | 2006 |
| Aqua Inspired Engineering Limited | Aberdeen | 2024 |
| Aqua Interpreting Solutions Ltd | Batley | 2014 |
| Aqua JET Profiles Limited | Coventry | 2001 |
| Aqua Labs Global Services Ltd | Gatwick | 2025 |
| Aqua Languages Limited | Batley | 2013 |
| Aqua Law Limited | London | 2018 |
| Aqua Locums Ltd | Barking | 2011 |
| Aqua Ltd | Coalville | 2010 |
| Aqua Machina Ltd | London | 2024 |
| Aqua Marine & Aviation Ltd | Cheltenham | 2017 |
| Aqua Moon Creative Ltd | Hove | 2021 |
| Aqua Nepa Limited | London | 2006 |
| Aqua People Consulting Ltd | Edinburgh | 2020 |
| Aqua Pharma Ltd | Inverness | 2009 |
| Aqua Plus Herbal Ltd | Mayfield | 2020 |
| Aqua Power Ltd | Edinburgh | 2020 |
| Aqua Power Technologies Limited | Grange-Over-Sands | 2014 |
| Aqua Pura Consultancy Ltd | Gloucester | 2025 |
| Aqua Pure 52 Ltd | London | 2026 |
| Aqua Reach AI Ltd | Liskeard | 2025 |
| Aqua Recoup Ltd | Stockport | 2026 |
| Aqua Rosa Limited | Altrincham | 2006 |
| Aqua Safe Solutions Limited | Oldham | 2025 |
| Aqua Sail Consultants Limited | Cambridge | 2019 |
| Aqua Sanitas Ltd | Croydon | 2022 |
| Aqua Sniff Ltd | Harrow | 2025 |
| Aqua Spatial Limited | Birmingham | 2024 |
| Aqua Spazio Ltd | London | 2024 |
| Aqua Specialists Ltd | London | 2023 |
| Aqua Statera Ltd | London | 2023 |
| Aqua Systems Design Limited | Bristol | 2014 |
| Aqua Talent Consulting Limited | Chiswick | 2019 |
| Aqua Tech 365 Services Ltd | London | 2023 |
| Aqua Tech UK Solutions Ltd | Hinckley | 2025 |
| Aqua Technical Services Ltd | Broadway | 2016 |
| Aqua Technology Limited | Basildon | 2023 |
| Aqua Terra Consultants Ltd | Cardiff | 2024 |
| Aqua Trackside Ltd | Skelmersdale | 1995 |
| Aqua Vault Ltd | London | 2026 |
| Aqua Vision Consulting Limited | Brecon | 2002 |
| Aqua Vista Hotels Ltd | London | 2011 |
| Aqua Visus Ltd | Loughborough | 2019 |
| Aqua Vitae Consulting Ltd | London | 2026 |
| Aqua Water Services Ltd | Coatbridge | 2025 |
| Aqua Zone (GB) Limited | Sheffield | 2010 |
| Aqua-Glass Limited | Nr. Ormskirk | 1980 |
| Aqua-Pro Engineering Ltd | Warrington | 2020 |
| Aqua-Rep Ltd. | Wilmington Dartford | 2001 |
| Aqua-Tech Consultancy Ltd | Newton Abbot | 2009 |
| Aqua-Terra Europe Ltd | Glasgow | 2013 |
| AQUA21 Limited | Glasgow | 2010 |
| Aquaai Ltd | London | 2025 |
| Aquaarios 1 Limited | Uxbridge | 2018 |
| Aquab Nanobubble Innovations Ltd | Glasgow | 2023 |
| Aquababies East London Limited | London | 2018 |
| Aquaband Limited | London | 2011 |
| Aquability OPS Limited | Sheffield | 2015 |
| Aquabio Limited | Worcester | 1997 |
| Aquabridge Limited | Felixstowe | 2014 |
| Aquacam Ltd | Hoddesdon | 2022 |
| Aquachain Limited | Chatham | 2003 |
| Aquaclean Holdings Limited | Rossendale | 2022 |
| Aquaclinical Ltd | Hartley Wintney | 2021 |
| Aquacoe Limited | Heathfield | 2021 |
| Aquacompliance Ltd | Abertillery | 2026 |
| Aquacore Consultancy Ltd | Glasgow | 2026 |
| Aquacyan Consultants Ltd. | Bristol | 2014 |