ACCA Australia and New Zealand with Net Balance Foundation Limited, October 2011. This report analyses the disclosure of aspects of supply chain sustainability by the Australian Securities Exchange top 100 companies. Few, if any, previous studies of this nature have focussed on the sustainability of both upstream and downstream elements of ASX 100 supply chain disclosure. The report highlights many examples of good practice in the disclosure of relevant upstream and downstream policies and procedures within the ASX 100. It also shows, however, a wide range of variability in disclosure, both between and within different industry sectors.