Bill and Flora Hewlett consolidated their philanthropic activity into the William R. Hewlett Foundation, which Bill, aged 53, founded in 1966 in their
Palo Alto, California, home. Founding board members were Bill, Flora, and the couple's oldest son, Walter Hewlett. The years 1966–1972 were referred to as "the living room years". Flora Hewlett served as a board member and Bill Hewlett was an active part of the foundation until his death. Bill Hewlett sought to fund established organizations operating in his fields of interest. In its first ten years, the foundation awarded close to $15.3 million to organizations involved in education, population, performing arts, environment, health, and social services. In 1972, the foundation's board of directors was expanded with the addition of William A. Hewlett and James S. Hewlett. In 1974, the foundation hired its first executive director, John May, who was also the executive of the
San Francisco Foundation. Shortly after, the foundation appointed former
University of California Chancellor
Roger W. Heyns as president, with Bill Hewlett becoming the board chair. The board was expanded with the addition of Eleanor Hewlett Gilmon and Mary Hewlett Jaffe, daughters of Bill and Flora. Since 1981, the majority of the foundation's board has been composed of non-family members. In 1993, with the appointment of former
University of California President
David P. Gardner, who succeeded Roger Heyns who retired after 15 years, the foundation's focus widened. The foundation expanded its funding of environmental causes, formerly restricted to California, to all over the
Western United States and
Canada. The foundation also began focusing on
K-12 education reforms. Gardner introduced a new program supporting relations between the
US and
Latin America. Gardner served for six years. During Gardner's tenure, the foundation introduced the limitation of terms served as program officers with terms expiring after six years, followed by an extension of three years with board approval. In 2005, this term limit was extended to eight years. In January 2000,
Paul Brest, the former dean of
Stanford Law School, was appointed as the new president of the foundation. He served for 12 years. On January 12, 2001, Bill Hewlett, aged 87 years, died from heart failure. During Brest's time as president, the foundation started to focus on awarding grants for efforts curbing
global warming and the expansion of the use of
open educational resources. During this time, the foundation also relocated to
Menlo Park, California. In 2003, previous to serving as
United States Secretary of Energy, American physicist
Steven Chu served on the Hewlett Foundation's board of directors.
Larry Kramer, also a former dean of Stanford Law School, became the foundation's president in 2012. He introduced new initiatives addressing political polarization as well as
cybersecurity. Kramer stepped down in December 2023.
Stephen C. Neal, who had been serving as a board member since 2006, was appointed as and succeeded Walter Hewlett as board chair. Neal was succeeded as board chair in 2021 by former California Supreme Court justice
Mariano-Florentino Cuéllar. In June 2024,
Amber D. Miller, an American experimental cosmologist and former dean of the
USC Dana and David Dornsife College of Letters, Arts and Sciences, became president of the Hewlett Foundation.
Foundation assets and endowment During its first ten years, the foundation awarded grants of approximately $15.3 million. The foundation's endowment kept growing considerably, with Flora Hewlett's estate bolstering it to more than $300 million in 1981 and the foundation's assets reaching more than $800 million by the 1990s, an increase of more than 30 times. Between 1993 and 1999, under the leadership of David P. Gardner, the foundation's
assets grew to more than $2 billion and grants increased from $35 million in 1993 to $84 million in 1998. In 2000, the foundation's assets had grown to $3.93 billion. This increased further with the transfer of Bill Hewlett's estate bringing the assets up to $8.52 billion and catapulting the foundation into the fifth place of
private foundations in America. According to the
OECD, the Hewlett Foundation provided USD 123.3 million for development in 2019, all in the form of grants. ==Programs and grants==