The Alexander S. Onassis Public Benefit Foundation was established in December 1975 in accordance with Aristotle Onassis' last wish to honor the memory of his son, Alexander. The Alexander S. Onassis Public Benefit Foundation’s headquarters are located in Vaduz, Liechtenstein, as was directed in Aristotle Onassis' will.

Culture, education, the environment, health, and social solidarity come first on the agenda of the Alexander S. Onassis Public Benefit Foundation.

All projects of the Alexander S. Onassis Public Benefit Foundation relate to Greece or Greek culture and civilization. In the sector of social solidarity the Foundation promotes significant public benefit projects, while according to both the Foundation's regulations and the wishes of Aristotle Onassis, individual charity is not allowed.

All activities of the Alexander S. Onassis Public Benefit Foundation are funded exclusively by the profits of an autonomous and institutionally independent Business Foundation named Alexander S. Onassis Foundation, also based in Vaduz, Liechtenstein. The Business Foundation engages mainly in shipping, real estate and financial products investments.