Full Members
- The Bank of England
- British Library (BL)
- Cambridge University Library
- Digital Curation Centre
- European Central Bank
- Jisc
- Lloyds Banking Group
- The National Archives
- National Library of Scotland (NLS)
- National Library of Wales (NLW)
- National Records of Scotland (NRS)
- The Nuclear Decommissioning Authority (NDA)
- Public Record Office Northern Ireland (PRONI)
- Research Councils UK
- Unilever Archives and Records Management
- United Nations HQ
- United Nations High Commission for Refugees
- United Nations Office at Geneva (UNOG)
- United Nations International Residual Mechanism for Criminal Tribunals
- University of Glasgow
- University of London Computer Centre (ULCC)
- University of Oxford
- University of Sheffield
Associate Members
- Aberystwyth University, Department of Information Studies
- Academic Preservation Trust
- Archaeology Data Service (ADS)
- The Archives and Records Association (ARA)
- Bacardi-Martini Inc.
- BBC
- British Museum
- Chester Beatty
- DANS - Data Archive Network Service
- Digital Preservation Network (DPN)
- Digital Repository of Ireland (DRI)
- Durham University
- EU Publications Office
- Historic England
- Grosvenor Estate
- HSBC
- Internet Archive
- King's College London
- Lancaster University
- Leeds University Library
- Library and Archives Canada
- London School of Economics (LSE) Library
- London School of Hygiene and Tropical Medicine
- Loughborough University
- National Archives of Ireland
- National Library of Ireland (NLI)
- Open University (OU)
- Parliamentary Archives
- Portico
- Portsmouth University
- Qatar National Library
- RBS Archives
- Royal Commission on the Ancient and Historical Monuments of Scotland / Royal Commission on the Ancient and Historical Monuments of Wales (The 'SWISH' Partnership)
- Royal Institute of British Architects, British Architectural Library
- Royal Museums Greenwich
- Scottish Council on Archives
- Swansea University
- Tate
- Trinity College Library Dublin (TCLD)
- UK Data Archive, Essex University (UKDA)
- UK LOCKSS Alliance (UKLA)
- University College Dublin
- University College London
- University of the Arts London
- University of Bath Library
- University of Birmingham, Library Services
- University of East Anglia
- University of Edinburgh, Library and Collections
- University of Hull
- University of Kent
- University of Liverpool
- University of Manchester Library
- University of Melbourne
- University of Nottingham
- University of Salford
- University of St Andrews
- University of Sussex
- University of Warwick, Modern Records Centre
- University of York Information Directorate
- Wellcome Library
- Welsh Government, Museums Archives and Libraries Division (MALD)