| Active Defence Legal Services Limited | Newbury | 2017 |
| Active Defence Limited | Reading | 2018 |
| Active Designs Limited | London | 2002 |
| Active Device Development Limited | York | 2010 |
| Active Energy Assessors Limited | Stafford | 2006 |
| Active Energy Generation Limited | Jesmond | 2025 |
| Active Energy Group PLC | London | 1996 |
| Active Energy Information Systems Ltd | Poole | 2020 |
| Active Engineering (UK) Limited | Burton On Trent | 1999 |
| Active Equine Limited | Leicester | 2021 |
| Active Families Limited | West Molesey | 2009 |
| Active Fire & Security Systems Limited | Beckenham | 2014 |
| Active Fixings Ltd | Wolverhampton | 2019 |
| Active FOX Limited | Epsom | 2015 |
| Active Future Franchising Ltd | Stocksfield | 2023 |
| Active Growth Limited | London | 2021 |
| Active Health Tech Ltd | Croydon | 2016 |
| Active Healthstyle Limited | Aberdeen | 2015 |
| Active Heating and GAS Limited | Kidderminster | 2018 |
| Active Hospitality Solutions Ltd | Torquay | 2010 |
| Active House Ltd. | Haywards Heath | 2011 |
| Active Imagining Ltd | Edinburgh | 2026 |
| Active Immigration Solutions Limited | Kent | 2005 |
| Active in the Community C.I.C. | Aylesbury | 2017 |
| Active Insight Consulting Limited | Woburn Sands | 1998 |
| Active Installations Limited | Kettering | 2016 |
| Active Interest Limited | London | 2007 |
| Active Interpreting and Training Ltd | Southport | 2018 |
| Active Kids Plus Consultancy Ltd | Sunderland | 2022 |
| Active Languages Limited | Shanklin | 1999 |
| Active Lawyer Ltd | London | 2025 |
| Active Lean Solutions Ltd | Ashbourne | 2006 |
| Active Learning & Development Limited | Cardiff | 1990 |
| Active Legal Limited | Walsall | 2009 |
| Active Legs Limited | Sheffield | 2015 |
| Active Leisure Contracts Limited | Southfleet | 1999 |
| Active Lifestyle Protection Ltd | Leeds | 2008 |
| Active Lift Trucks Ltd | Hull | 2019 |
| Active Listening NOW Ltd | London | 2024 |
| Active Magazines Limited | Barnet | 2004 |
| Active Management Ltd | Waltham Cross | 2025 |
| Active Maps Limited | Macclesfield | 1997 |
| Active Market Research Limited | Cirencester | 2002 |
| Active Marketing Limited | London | 2019 |
| Active Marketing Masters Ltd | Mildenhall | 2025 |
| Active Marketing Solutions UK Ltd | Barnsley | 2019 |
| Active Media Consulting Limited | Oxfordshire | 1998 |
| Active Media Events Limited | London | 2007 |
| Active Media London Ltd | London | 2017 |
| Active Media Services (UK) Limited | London | 1994 |
| Active Mentor Ltd | London | 2022 |
| Active Minds Consulting Limited | Deepcut | 2021 |
| Active Money Scotland Ltd | Glasgow | 2020 |
| Active Navigation Limited | Winchester | 2011 |
| Active Needle Technology Ltd | Abingdon | 2016 |
| Active Networks Limited | Datchet | 2004 |
| Active NON Executive Services Limited | Berkhamsted | 2005 |
| Active North Ltd | Falkirk | 2019 |
| Active PAT Testing UK Ltd | Doncaster | 2025 |
| Active Pathways Holdings Limited | Chorley | 2014 |
| Active Personnel HR Ltd | Glasgow | 2024 |
| Active Personnel Management Limited | Leicester | 1998 |
| Active Pet Physio Ltd | Wellingborough | 2010 |
| Active Pharma CMC Consulting Ltd | London | 2026 |
| Active Pharma Support Limited | Canterbury | 2010 |
| Active Photographic Ltd | Ollerton | 2018 |
| Active Physio Clinics Limited | Chichester | 2003 |
| Active Physiques Limited | Heywood | 2024 |
| Active Play Ltd | Dartmouth | 2025 |
| Active Plus Accounting Limited | Manchester | 2025 |
| Active Potential Therapy Limited | Calne | 2015 |
| Active Power Electronics Ltd | Leicester | 2024 |
| Active Power Engineering Limited | Knutsford | 2026 |
| Active Principle Limited | Saffron Walden | 2017 |
| Active Product Design Limited | Littlehampton | 2007 |
| Active Profile Limited | Manchester | 2004 |
| Active Property Investment Limited | Coventry | 2015 |
| Active Property Services London Ltd | Ilford | 2019 |
| Active Public Relations Limited | Liverpool | 1993 |
| Active Quality Recruitment Limited | Chester | 1997 |
| Active Remedy Limited | London | 2005 |
| Active Resource Technologies Ltd | Godalming | 2013 |
| Active Resourcing Ltd | Woodford Green | 2022 |
| Active Retail Limited | East Finchley | 1996 |
| Active Return Ltd | Sheringham | 2014 |
| Active Rights Management Limited | London | 1999 |
| Active Risk Management Ltd. | Ayrshire | 2004 |
| Active Roma CIC | Yeovil | 2026 |
| Active Scaleup Limited | Manchester | 2023 |
| Active Security Systems (South) Ltd | Dover | 2009 |
| Active Sense Ltd | Epsom | 2017 |
| Active Shipping & Training Limited | Chatham | 2011 |
| Active Solutions WW Ltd | Poole | 2023 |
| Active Spirit Ltd | London | 2019 |
| Active Studies Limited | Newport | 2017 |
| Active Suppression Laboratories Ltd | Evesham | 2025 |
| Active Synergie Consulting Ltd | Stockport | 2006 |
| Active Tax Ltd | Wolverhampton | 2021 |
| Active Taxi Hire Limited | Manchester | 2016 |
| Active Teams Ltd | London | 2020 |