External Audit The Commonwealth Auditor-General, through the ANAO, is the external auditor for ANSTO and its Australian-based subsidiaries. ANSTO’s United States-based subsidiary, ANSTO Inc., was dissolved during the period and its final audit was performed by Wipfli LLP. Registered in Delaware USA. Based in Washington DC. Inactive. ANSTO Inc. was dissolved on 3 May 2022. Prior to its dissolution, ANSTO Inc. was inactive from 1 July 2021 to 2 May 2022. For the 2021–2022 financial year, the ANAO contracted Ernst & Young to assist with the external audits of ANSTO and its Australian-based subsidiaries. Ernst & Young did not provide any non-audit services to ANSTO during the period 1 July 2021 to 30 June 2022. https://www.transparency.gov.au/annual-reports/australian-nuclear-science-and-technology-organisation/reporting-year/2021-22-42