The Vanguard Group, Inc in the US has filed Form N-CEN (annual report) with the US Securities and Exchange Commission (SEC) as part of the regulatory requirements of the SEC.
Interests in US listed exchange traded funds (ETFs) can be accessed by Australian investors through CHESS Depositary Interests that are quoted on the AQUA market of the Australian Securities Exchange (ASX).
Retail investors can transact in Vanguard ETFs through a stockbroker or financial adviser on the secondary market.