The Buck Foundation Trust was created by Beryl Hamilton Buck after the death in 1953 of her husband, pathologist Leonard W. Buck. Leonard's father, Frank Buck, was one of the founders of
Belridge Oil. Attempts by the San Francisco Foundation to use the
cy pres doctrine to spend outside of Marin County resulted in litigation which the SF Foundation lost. As part of a 1986 court settlement, the Marin Community Foundation was established to administer the trust, valued in 2013 at approximately $1 billion. The settlement required that 80% of the trust's annual earnings be distributed to causes specific to Marin County. The remaining 20% is to be distributed among three Marin County organizations: •
Alcohol Justice, formerly named The Marin Institute, which deals with alcohol-related problems. In 2016, the institute began talks with the
Gladstone Institutes, a San Francisco-based foundation, regarding a possible research alliance or merger. That discussion ended in October 2016. In December 2022, the institute hosted The Longevity Summit, a two-day conference on ageing, the emerging new biotech companies in the field, and their innovations. ==Facilities==