Numerous member societies have issued statements in response to the systemic racism that has been brought back to national attention by the murder of George Floyd:
MoMath statement on diversity and inclusion
From other organizations:
American Association for the Advancement of Science (AAAS)
Association of Public and Land-Grant Universities (APLU)
Carnegie Corporation of New York
Council on Undergraduate Research (CUR)
Institute for Advanced Study (IAS)
The National Alliance for Doctoral Studies in the Mathematical Sciences (Math Alliance)