Mercury Foundation

Mercury Foundation is a deeply private, invitation-driven trust operating almost entirely outside the public grant landscape. Established in August 2017 with an IRS ruling and structured as an independent private foundation (NTEE T22), the organization is administered c/o Baker Tilly at 3 Lagoon Drive, Suite 400, Redwood City, CA 94065 — a national accounting and advisory firm that handles the operational infrastructure. Trustee Peter Walker Grousbeck (contact address: PO Box 29129, Los Angeles, CA 90029) is the sole listed fiduciary and receives no compensation, indicating a philanthropist-led rather than staff-driven organization.

The foundation's giving philosophy is anchored in three interlocking pillars: reproductive rights and women's health, environmental conservation (particularly wildlife and oceans), and civil rights and immigration legal defense. These are not coincidental program areas but reflect a coherent progressive movement-building strategy, consistent with donor networks active in California and New York donor communities.

Relationship progression here is atypical. Mercury does not publish an application portal, has no grants page, and its listed website domain (mercuryphoenixtrust.com) has been compromised. The foundation explicitly warns that unsolicited requests 'may not receive acknowledgment.' This means first-time applicants should not treat this as a typical RFP process. Instead, the viable pathways are: (1) a warm introduction to Peter Grousbeck through peer philanthropists or Baker Tilly advisors; (2) an existing relationship with Rockefeller Philanthropy Advisors, which received $40M from Mercury across three grants and serves as a major intermediary; or (3) a prior grantee referral from Planned Parenthood, Center for Reproductive Rights, Panthera, or NAACP LDF.

Organizations that proceed to contact should know that Mercury funds exclusively through general operating support — no project or restricted grants appear in the record. Budget size is not a disqualifier at the lower end (Food Finders and Youth Emerging Stronger both received $200K-$250K), but alignment with the three focal areas is non-negotiable. The foundation has grown from $12.2M in FY2018 to roughly $26.5M in giving by FY2024, signaling that it is actively deploying capital and may be open to adding new grantee relationships when properly introduced.

Mercury Foundation's grantmaking profile reflects a high-conviction, concentrated strategy. Tracked giving across 23 grants totals $60.6M, with an average grant of $2.63M and a median of approximately $2.5M. However, the mean is severely skewed by the Rockefeller Philanthropy Advisors relationship ($40M over 3 grants), which alone accounts for 66% of all tracked grant dollars.

Excluding the RPA relationship, direct grantmaking to programmatic nonprofits runs from $5,000 (Westridge School, likely a personal/board connection) to $7M (Planned Parenthood Federation of America across 3 grants). For organizations in Mercury's focus areas, a realistic first grant falls in the $500K–$2M range. The foundation's own database record confirms a typical grant range of $500K–$15M with a median of $2.5M and average of $5.125M.

Grant trajectory shows consistent year-over-year growth: $12.2M paid (FY2018) → $17.2M (FY2019) → $17.6M (FY2020) → $20.5M (FY2021) → $22.5M (FY2022) → $25.3M total giving (FY2023). The foundation's payout rate of approximately 8–9% of assets exceeds the IRS-mandated 5% minimum by a wide margin, suggesting a founder who is actively deploying rather than preserving capital.

By program area (estimated from grantee analysis): reproductive rights and women's health represent approximately 24% of direct programmatic dollars ($14.75M to PPFA, PP LA, Center for Reproductive Rights, Downtown Women's Center); environmental conservation represents approximately 7% ($3.65M to Panthera, NRDC, Sea Shepherd, WWF); and civil rights and immigration legal defense represents approximately 2% ($1.25M to NAACP LDF and Immigrant Legal Resource Center). The remaining 66% flows through RPA as philanthropic infrastructure.

Geographically, New York-based grantees received 57% of grants by count (13 of 23), California-based 35% (8 of 23). Recurrence is common: RPA (3 grants), PPFA (3), PP LA (3), Panthera (3), and Center for Reproductive Rights (2) are all multi-grant recipients, confirming the foundation's preference for deepening relationships over broad portfolio diversification.

The following table compares Mercury Foundation to four asset-size peers, all classified under NTEE T (Philanthropy & Grantmaking) with assets in the $270–$275M range:

Mercury Foundation stands apart from this peer group in two critical ways. First, its annual grantmaking — $22.5M–$26.5M — represents a payout rate of roughly 8–9%, nearly double the peer-group average, which hovers near the 5% minimum. This signals a founder-philanthropist actively moving capital rather than an endowment manager prioritizing perpetuity. Second, Mercury's focus areas (reproductive rights, environmental advocacy, civil rights) are distinctly more politically oriented than peers like Cullen or Rowan, which fund more institutional civic or educational purposes. Organizations whose missions overlap with progressive movement infrastructure will find Mercury a uniquely large funder at this asset tier.

Mercury Foundation maintains an unusually low public profile for a foundation of its size. No press releases, annual reports, or public announcements have been found for 2025 or 2026. The foundation does not operate a functional public website — the domain listed in its IRS records (mercuryphoenixtrust.com) redirects to a sports betting review platform as of March 2026, indicating the original site is defunct and the domain was not renewed or secured.

The most recent publicly available 990-PF data reflects FY2022, showing $22.5M in grants paid on $282.7M in assets. Third-party grant intelligence platforms (Grantable.co) report approximately $26.5M in annual giving and 11 grants awarded in the most recent tracked year (2024), consistent with the foundation's growth trajectory.

The foundation's last major structural milestone was its establishment: the IRS issued its ruling in August 2017, making Mercury Foundation a relatively young institution (approximately 8 years old as of 2026). No leadership changes, new program announcements, or strategic shifts have been publicly reported. The continued presence of Peter Walker Grousbeck as the sole trustee across all available 990 filings (FY2018–FY2022) confirms stable, single-trustee governance. All officer compensation is $0 across all years, consistent with a founder-managed private trust.

Given Mercury Foundation's explicit statement that unsolicited requests may not receive acknowledgment, conventional grant-seeking approaches will not work here. The following tips are specific to this funder's documented behavior and structure.

Pursue introduction, not application. The only documented pathway is a warm introduction to trustee Peter Walker Grousbeck or his Baker Tilly advisors. Peer-organization referrals from Planned Parenthood, Center for Reproductive Rights, Panthera, or NAACP Legal Defense Fund are the highest-value relationship bridges available.

Work the RPA angle. Rockefeller Philanthropy Advisors received $40M from Mercury over three grants — by far the largest relationship in the portfolio. If your organization already works with RPA (as a fiscal sponsor, donor advisory client, or capacity partner), this represents a potential indirect funding pathway worth exploring explicitly with your RPA contact.

Frame everything as general operating support. Every tracked Mercury grant is coded 'GENERAL' — no project-specific, capital, or restricted gifts appear in the record. Do not pitch a program or initiative. Frame your request as investment in organizational strength and movement infrastructure.

Align language to the three focal pillars. Use terminology the foundation's grantees use: 'reproductive justice,' 'bodily autonomy,' 'wildlife conservation,' 'environmental defense,' 'civil rights legal representation,' 'immigration legal services.' Avoid generic nonprofit language about community impact.

Submit electronically with complete documentation. If you do reach the point of submission, electronic format is required (no portal specified — likely email through Baker Tilly). Include IRS 501(c)(3) determination letter. No deadlines are established, so timing your submission to coincide with established grantee renewal cycles (likely Q1 and Q3 based on fiscal year patterns) may improve response rates.

Do not follow up aggressively. The foundation's own language warns that unsolicited requests 'may not receive acknowledgment.' A single, patient follow-up at 60–90 days is the maximum appropriate cadence. Multiple follow-ups will likely disqualify a relationship before it starts.

Target the right geography. New York-based organizations (57% of grants) and California-based organizations (35%) are strongly preferred. If your organization operates nationally, lead with your NY or CA presence.