Much of the wealth has been locked up in the notable family trust of 1934 (which holds the bulk of the fortune and matures on the death of the fourth generation), and the trust of 1952, both administered by the Chase Manhattan Bank. These trusts have consisted of shares in the successor companies to Standard Oil and other diversified investments, as well as the family's considerable real estate holdings. They are administered by a trust committee that oversees the fortune. It has consisted over time of high-profile individuals, who have included Paul Volcker, William G. Bowen (former president of Princeton University) and John C. Whitehead (retired co-chairman of Goldman Sachs).