| Activate Impact Solutions Limited | Woodstock | 1999 |
| Activate Intelligence Ltd. | London | 2023 |
| Activate IT Solutions Limited | Buntingford | 2008 |
| Activate Mays Media Ltd | Melksham | 2023 |
| Activate Media Ltd | Hindhead | 2025 |
| Activate Ondemand (AOD) Limited | Christchurch | 2019 |
| Activate Studio Ltd. | London | 1992 |
| Activate&Co Ltd | London | 2025 |
| Activated Assets Group Ltd | Warrington | 2026 |
| Activated Realities Ltd | London | 2018 |
| Activated Thinking Limited | Roydon | 2015 |
| Activation Project Management Limited | London | 2025 |
| Activation Services Limited | Berkshire | 1999 |
| Activbytes UK Ltd | London | 2025 |
| Activcorp Limited | Manchester | 2010 |
| Active 4 Limited | East Grinstead | 2003 |
| Active 8 Services Ltd | Billericay | 2018 |
| Active 9 Ltd | St Albans | 2024 |
| Active AC Limited | Bristol | 2018 |
| Active Accessories Limited | London | 2010 |
| Active Agent Limited | Tenby | 2010 |
| Active AI Ltd | Nottingham | 2025 |
| Active AML Ltd | London | 2023 |
| Active Analytics Ltd. | Hereford | 2011 |
| Active Bits Limited | Cheltenham | 2012 |
| Active Blueprint Limited | Crewe | 2018 |
| Active Brains Ltd | Rickmansworth | 2002 |
| Active Bureau Ltd | Ilford | 2024 |
| Active Business Management Ltd | Scunthorpe | 2023 |
| Active Business Training Limited | Reading | 1999 |
| Active Cabling Ltd | Royston | 2025 |
| Active Care Education Ltd | Dartford | 2021 |
| Active Cloud Solutions Limited | Woodbridge | 2009 |
| Active Cluster Ltd | London | 2023 |
| Active Communication Company Limited | Eynsford | 1997 |
| Active Communication Solutions Limited | Wirral | 1993 |
| Active Communications Europe Limited | London | 2005 |
| Active Communications Limited | Coventry | 2005 |
| Active Computers UK Limited | Shrewsbury | 2013 |
| Active Consult Limited | Derby | 2016 |
| Active Cyber Resilience Ltd | Beverley | 2024 |
| Active Data Insights Limited | Isleworth | 2019 |
| Active Data Installations Limited | Newport Pagnell | 2007 |
| Active Data Management Limited | Redditch | 1998 |
| Active Design Consultants Limited | Berkshire | 1998 |
| Active Digital AI Limited | London | 2025 |
| Active Digital Communications Limited | London | 1996 |
| Active Digital Solutions Limited | Bury | 2025 |
| Active Digital Systems Limited | London | 2005 |
| Active Directory Consultants Ltd | London | 2015 |
| Active Documents Ltd | Hartlepool | 2001 |
| Active Dynamics Technology Limited | Bicester | 2015 |
| Active Education & Sport Ltd | Lincoln | 2019 |
| Active Enterprise Solutions Ltd | Bishops Stortford | 1999 |
| Active Essex Ltd | Buckhurst Hill | 2016 |
| Active Flip Ltd | Ilford | 2011 |
| Active Focus Ltd | Canterbury | 2021 |
| Active Games Limited | Manchester | 2025 |
| Active Gaming Ltd | Richmond | 2022 |
| Active Global Music Limited | Addlestone | 2009 |
| Active Governance Limited | Chippenham | 2026 |
| Active GRC Ltd | Hagley | 2013 |
| Active Guard Networks Limited | Hawes | 2017 |
| Active Imagination Ltd | London | 2013 |
| Active in Time Limited | London | 2011 |
| Active Index Solutions Limited | Truro | 2015 |
| Active Informatics Ltd | Basingstoke | 2008 |
| Active Information Design Limited | Glasgow | 2012 |
| Active Information Systems Limited | Chichester | 1998 |
| Active Insight Limited | Chippenham | 2022 |
| Active Integrated Systems Limited | Newark | 2019 |
| Active Integration Systems Ltd | Crewe | 2025 |
| Active IT Support Ltd | Southport | 2009 |
| Active Learning Technologies Ltd | Ruislip, | 2021 |
| Active Link Limited | Surrey | 1998 |
| Active Linkers Ltd | Southampton | 2024 |
| Active Logic Limited | Penarth | 1985 |
| Active Loyalty Limited | Henley-On-Thames | 2024 |
| Active Management International Ltd | London | 2016 |
| Active Matter Ltd | Birmingham | 2017 |
| Active Media Business Solutions Limited | Oxfordshire | 1997 |
| Active Media Group Limited | Cardiff | 2021 |
| Active Media Print Services Limited | Sutton Coldfield | 2003 |
| Active Media Solutions Limited | Lancashire | 1995 |
| Active Mind Studio Ltd | Loughborough | 2025 |
| Active Minds Limited | Liverpool | 2009 |
| Active Network Design Limited | Leigh On Sea | 2000 |
| Active Network Services Ltd | Lancing | 2016 |
| Active Network Solutions Limited | Lancing | 2002 |
| Active Networx Limited | Northampton | 2016 |
| Active Office Scotland Limited | Kilmarnock | 1966 |
| Active Orbit Limited | Scarborough | 2020 |
| Active Pictures (Film & Television) Limited | Gateshead | 1999 |
| Active Pixels Limited | Bishops Frome | 2004 |
| Active Planning Leads Ltd | Colchester | 2020 |
| Active Polymer Technologies Limited | London | 2015 |
| Active Presence Limited | London | 2002 |
| Active Processes Ltd | Coventry | 2016 |
| Active Progression Limited | Kettering | 1999 |
| Active Publishing Limited | Wimborne | 2003 |