William & Flora Hewlett Foundation

The William & Flora Hewlett Foundation is one of the most selective large funders in American philanthropy, and applicants must enter with eyes wide open: this is primarily a proactive grantmaking institution. Program staff identify and cultivate grantee relationships rather than waiting for applications to arrive. Fewer than 1% of unsolicited approaches result in a grant. That said, certain programs — most notably Environment — maintain a documented letter of inquiry track for organizations that genuinely align with current strategies.

Hewlett's giving philosophy centers on systems-change philanthropy. The foundation does not fund one-time events, capital campaigns, or narrow programmatic pilots unless they sit within a broader strategic relationship. Its preference is explicit: long-term, general operating support. Nearly three-fourths of the $625 million awarded in 2024 was flexible funding. This posture reflects a belief that effective organizations, empowered with unrestricted resources, produce better outcomes than grant-constrained project work.

First-time applicants should prioritize three actions before any formal outreach. First, read the current strategy documents for the specific program area relevant to their work — these are published on hewlett.org and updated as new program directors take over. Second, map their organization's geographic and thematic work precisely against Hewlett's defined focus areas (the Bay Area for arts, the U.S. West for conservation, East and West Africa and Mexico for gender equity). Third, scan the grants database (hewlett.org/grants) to understand which organizations Hewlett already funds in that space — this reveals both the competitive landscape and potential warm-introduction pathways.

Organizations receiving their first Hewlett grant typically have an established track record in their field, an evidence-based theory of change, and existing relationships with program staff developed over years. The foundation favors institutions capable of influencing policy, shifting norms, or catalyzing field-level change — not simply delivering direct services. Building a relationship with a program officer at a conference, through a shared colleague, or via published research is the most reliable path to eventual consideration.

The William & Flora Hewlett Foundation operates at substantial scale, awarding $625 million in grants in fiscal year 2024 — down modestly from $700 million in 2023 but up from $566 million in 2020, reflecting consistent growth across the decade. Annual giving has risen steadily: $468M (2020), $519M (2021), $560M (2022), $605M (2023), $624M (2024) in grants paid.

Grant sizes span an extraordinary range. Foundation data shows a median grant of $150,000, an average of $292,460, and awards from as low as $100 to as high as $12 million in a single grant. In practice, the most meaningful tier for most applicants is $100,000-$500,000. Flagship institutional partnerships — such as multi-year commitments to European Climate Foundation ($81.3 million across 44 grants), Climateworks Foundation ($88+ million combined), and Rockefeller Philanthropy Advisors ($47.9 million across 49 grants) — illustrate what decade-long strategic relationships look like at this foundation. San Francisco Foundation received $22.5 million in just 3 grants ($7.5M average), while Columbia University received $20.9 million across 8 grants.

Geographically, California dominates the grant portfolio with 2,517 of 7,585 tracked grants — roughly 33% of all awards. Washington, D.C. is the second largest hub (1,461 grants, 19%), reflecting Hewlett's deep investment in policy advocacy and think tanks. New York accounts for 732 grants (10%), Massachusetts 335 (4%), and Virginia 140 (2%).

By program area, Environment and Climate is the dominant category by dollar volume. Eight of the top twenty grantees by total dollars are climate, energy, or conservation organizations. Education (open educational resources, K-12 reform) and U.S. Democracy (election integrity, civic institutions) are the next largest clusters. Performing Arts grants are Bay Area-concentrated and typically smaller ($100,000-$500,000 range).

The William & Flora Hewlett Foundation sits among the largest private foundations in the United States, competing for talent and grantee relationships with a peer set of similarly scaled institutions. The comparison below draws on available IRS and foundation-reported data.

Among this peer set, Hewlett is distinctive in the breadth of its program portfolio — nine active program areas versus the two-to-four typical of peers — creating more potential entry points for applicants, though program budgets are correspondingly divided. Hewlett's preference for general operating support (75% of 2024 grants as flexible funding) is more pronounced than Ford Foundation or RWJF, which maintain larger restricted grant programs. The Moore Foundation is a closer analogue in its science-and-environment emphasis, though Moore focuses more heavily on research institutions and less on policy advocacy. All five peers operate invitation-only models; none accepts unsolicited full proposals.

The William & Flora Hewlett Foundation is in an active organizational transition that will shape grantmaking priorities through 2026 and beyond. Astrophysicist and university leader Amber D. Miller assumed the presidency in September 2024, succeeding Larry Kramer after his decade-long tenure. Her compensation package (reported at $845,372 as of the transition period) reflects the seniority of the role.

Four program director positions turned over between mid-2025 and early 2026. Ash Vasudeva joined as Education Program Director in August 2025. Dave Turk — former U.S. Deputy Secretary of Energy under the Biden administration — became Environment Program Director on December 1, 2025, the highest-profile external hire in recent memory. Robert van Leer was named Performing Arts Program Director in November 2025, starting February 23, 2026. Ali Noorani departed as U.S. Democracy Program Director to lead the Barr Foundation, creating a leadership gap in a program receiving significant grantmaking attention.

On the grantmaking side, February 2026 brought a $10 million tranche of emerging technology security grants, including a $2.5 million award to Vanderbilt University's Institute of National Security for AI-driven information warfare research and a companion grant to Stanford's Hoover Institution. A $45 million, three-year commitment to AI for public good represents the foundation's largest explicit move into technology governance. In November 2025, Hewlett made Racial Justice grants to the Latino Community Foundation, PolicyLink, and Solidaire, confirming that initiative has matured from experimental to sustained.

Identify your program entry point precisely. Hewlett's nine program areas have distinct strategies, geographies, and program officers. A climate policy organization and a California conservation land trust both touch 'Environment' but are handled by different staff with different mandates. Read the strategy page for your specific program area at hewlett.org before making any contact.

The Environment Program is your best unsolicited bet. Of all Hewlett's programs, Environment has the most documented track of accepting letters of inquiry from organizations outside existing relationships. Climate, clean energy, U.S. West conservation, and global decarbonization organizations should draft a concise LOI (two pages maximum) that maps work to specific Hewlett environment strategies — not generic climate language.

Language that resonates: 'evidence-based,' 'field-building,' 'systems change,' 'long-term operating support,' 'policy influence,' 'cross-sector collaboration.' Avoid: 'direct service,' 'pilot project,' 'matching grant,' 'capital campaign.' Hewlett is looking for organizations that shift fields, not deliver programs.

Timing matters in 2025-2026. Four program directors are new. New directors typically spend their first 6-12 months listening to current grantees and learning the landscape before making new grant commitments. The ideal window for outreach to new directors is roughly 12-18 months into tenure — late 2026 to early 2027 for Education, Environment, and Performing Arts.

Fiscal sponsorship is allowed. If your organization lacks 501(c)(3) status, Hewlett accepts grants through fiscal sponsors — a meaningful opening for emerging organizations and networks.

Avoid the most common mistakes: submitting an unsolicited full proposal (Hewlett does not accept them); pitching a narrow one-year project; claiming global reach without specifying the Hewlett-defined geographies; and failing to demonstrate a systems-change theory of change beyond direct program delivery.

Sign up at hewlett.org/sign-up and follow the foundation on LinkedIn. Open competitions like the Hewlett 50 Arts Commissions are announced through these channels — often with short application windows of four to six weeks.