‘The International Society for Immunohistochemistry and Molecular Morphology’ (ISIMM) was founded in March, 2016, during the week of the USCAP meeting in Seattle, USA. The major driving ‘force’ for this effort has been an initiative of the external quality control and assurance agencies, NordiQC, CIQC, UKNEQAS, IQNPath (and others), and editorial board members of AIMM, which is the affiliated journal of the new society. As part of the foundation process the existing Society for Applied Immunohistochemistry has agreed to merge its activities and its members into ISIMM.