The Grantham Foundation For The Protection Of The Environment

The Grantham Foundation operates as one of the most consequential privately held climate funders in the United States, deploying $66.96 million in grants during fiscal year 2024 — a 9.2% increase over 2023's $61.35 million and nearly double the $29.9 million it awarded in 2020. Founded in 1997 by Jeremy Grantham (co-founder of investment management firm GMO, LLC) and his wife Hannelore, the foundation reflects their personal conviction that climate change is humanity's defining crisis demanding urgent, high-leverage philanthropy.

This is fundamentally a family enterprise. Five Grantham family trustees — Jeremy, Hannelore, Oliver, Rupert, and Isabel Grantham Rappoport — set overall direction, with President Ramsay Ravenel managing operations. All trustee positions are uncompensated, signaling mission-driven philanthropy rather than professionally managed grantmaking. The family's intellectual fingerprint is visible in every funding decision.

The application model is strictly invitation-only. The foundation will not respond to unsolicited proposals — there is no grant portal, no RFP, no application form. Grantham identifies organizations proactively, monitors the field closely, and initiates contact when a strong fit emerges. For organizations seeking support, the realistic path is to become known through published research, media visibility, peer networks, and conference presence — not direct outreach.

The grantee portfolio favors established, mission-driven organizations that combine research rigor with communications or policy influence: UCLA, Caltech, London School of Economics, Environmental Defense Fund, ClientEarth USA, Carbon Mapper, and Conservation International rank among top recipients. The foundation also sustains heavy investment in European organizations — Dutch stichtings and UK research institutes receive the largest individual grants, reflecting Jeremy Grantham's British roots and global outlook.

Grant relationships are multi-year and deepening. The foundation has funded Grantham-named institutes at LSE, Imperial College London, University of Sheffield, and Indian Institute of Science across multiple cycles. Organizations should expect that entry at a modest scale ($250,000-$500,000) may grow substantially over a multi-year relationship if outcomes are strong and the partnership deepens.

The Grantham Foundation's annual giving has nearly doubled over five years: $29.9M (2020) → $35.1M (2021) → $54.6M (2022) → $61.35M (2023) → $66.96M (2024). The $613.2 million asset base as of fiscal year 2024 provides a stable platform, though revenue fluctuates significantly with investment returns — net investment income swung from $168.6M in 2022 to $0 reported in 2023, supplemented by Jeremy Grantham's personal contributions ($28.8M in 2024 alone).

Typical grant size data from 60 analyzed grants: median $250,000, average $585,150, range $8,000 to $3,985,000. The distribution is heavily right-skewed — the top 10 grantees received roughly $43.7M combined across 18 grants, while many smaller awards exist for exploratory or early-stage organizations.

By program area, the foundation's capital breaks down approximately as follows: - CDR research (carbon mineralization, geological/ocean CDR, soil carbon, biological approaches): UCLA ($7.69M), Caltech ($3.8M), New Venture Fund geo-CDR ($2M), Yale wastewater mineralization ($1.1M), Colorado State soil carbon ($1.35M), Elemental Excelerator ($1M), Carbon Removal Foundation ($1.13M) — roughly 25-30% of annual giving. - Climate science and policy research: Windward Fund ($2.65M), Carbon Gap ($2.72M), Potsdam Institute ($2M), Cascade Climate ($1.83M), RMI ($2M climate tech education + $1.2M) — approximately 20-25%. - Climate communications and outreach: Stichting Sed Fund ($9.2M combined), Meliore FUP ($2.5M), Wild Aid ($2M), Potential Energy Coalition ($1.25M), 350.org ($1.25M) — approximately 18-22%. - Climate litigation: ClientEarth USA ($2.75M), Stichting FILE ($5.1M combined), Rockefeller Family Fund ($2.5M), Global Witness ($1.25M) — approximately 12-15%. - Conservation and restoration: Conservation International ($4.5M), Rewilding Europe ($1.4M), Linden Trust ($2.49M combined) — approximately 8-10%.

Geographically, NY (37 grants) and CA (36) lead in grantee count, followed by MA (29) and DC (21). Internationally, European organizations consistently receive the foundation's largest single awards.

The table below compares the Grantham Foundation to four asset-size peers identified in foundation databases, followed by context on relevant climate-focused comparators.

Among its asset-size peers, the Grantham Foundation stands in a category of its own: while Welch, Essex Avenue, Roots and Wings, and Invisible Hand operate as general or regionally bounded philanthropic vehicles, Grantham concentrates 100% of its grantmaking on climate and environment — with no diversification and no geographic limitation.

For more relevant competitive context, organizations should understand how Grantham compares to other major climate funders: the Bezos Earth Fund ($10B pledge, open calls in specific program areas), the Moore Foundation (environment program ~$200M/year, open LOI process), and ClimateWorks Foundation (regrantor model, pooled funding). Grantham offers larger median grants ($250,000 vs. typical climate funder medians of $75,000-$150,000) but requires no application — the trade-off is that entry is entirely at the foundation's discretion.

The most significant recent grant announcement is Grantham's multi-year investment in Whitehead Institute at MIT for a three-year bioengineering project designed to produce plants that hyperaccumulate sporopollenin — a decay-resistant biopolymer normally found only in reproductive tissues — in vegetative tissue. Researcher Jing-Ke Weng estimates that engineering 15% of global woody vegetation to carry this compound could achieve net-negative carbon emissions, representing one of the most ambitious biological CDR concepts currently being funded.

The foundation's Form 990-PF for fiscal year 2024 was filed with the IRS on November 17, 2025, confirming $66.96 million in grants paid — the highest annual total in the foundation's 28-year history. Among the year's largest disclosed grants: $7.685M to UCLA for CDR research and carbon monitoring; $4.5M to Conservation International; $4.1M to Stichting Foundation for International Law for the Environment; $4M to Carbon Mapper for NASA-JPL/Planet methane monitoring; and $3.8M to Caltech for a carbon mineralization project.

A University of Tokyo professor also received a Grantham grant for sustainable plastics research, signaling continued interest in novel materials science approaches to environmental protection beyond the foundation's traditional CDR and advocacy focus. No formal leadership changes have been reported; Ramsay Ravenel continues as President with the five Grantham family trustees unchanged. The posting of a Program Assistant role suggests the foundation is modestly expanding its operational capacity to manage growing grantmaking volume.

Since the Grantham Foundation accepts no unsolicited proposals, strategy is about positioning rather than paperwork. The following guidance reflects the observable patterns among successful grantees:

Get published and make your work legible. The foundation actively scans the climate research and advocacy landscape. Peer-reviewed articles in high-impact journals, op-eds in major outlets (New York Times, Financial Times, Nature), and presentations at key convenings (AGU, Climate Week NYC, UNFCOP side events) put organizations into the foundation's field of view. Visibility precedes relationship.

Align with active program themes — precisely. CDR research (carbon mineralization, geological storage, soil carbon, ocean-based, biological approaches), methane monitoring, climate communications targeting India/China/Nigeria, EU energy policy and climate litigation, and sustainable minerals for clean energy are the current investment themes. Generic 'sustainability' or 'resilience' language does not register. Mirror the foundation's specific vocabulary.

The 10% indirect cost cap is absolute. This requirement rules out many universities and NGOs without special cost-sharing arrangements. Calculate your F&A rate before any other step. A proposal with 15% overhead will not be funded regardless of the science.

Cultivate connections within the existing grantee network. Organizations like EDF, RMI, Carbon Mapper, ClientEarth USA, Conservation International, and the Windward Fund all have ongoing Grantham relationships. Attending their events, co-authoring research, or appearing on their platforms creates organic pathways to introduction.

International scope and European networks matter. A disproportionate share of Grantham's largest grants — several exceeding $3M — go to European organizations. U.S. applicants who can demonstrate transatlantic reach or partnerships with Grantham's European grantees (Stichting Sed Fund, European Climate Foundation, ClientEarth) significantly improve their profile.

Engage with Jeremy Grantham's public intellectual work. His essays on resource constraints, climate risk, and long-termism are widely available. Any proposal or conversation that demonstrates genuine engagement with his analytical framework — rather than generic climate appeals — signals seriousness of purpose and earns attention.