Principals

Principal Net Worth

$2.0B

Data Flags

Net worth ~$1B+ (98% pledged to climate per Bloomberg 2019); GMO AUM ~$38B+ verified; Giving Pledge 2013 confirmed; team verified via LinkedIn; UK-based - not on Forbes 400

Grantham Foundation for the Protection of the Environment

UnknownHigh Confidence

Last verified: Jan 17, 2026

Details

Source File: research/organizations/grantham-foundation.md
UID: fo-grantham-foundation

Also Known As

**Grantham Foundation****Grantham Foundation for the Protection of the Environment** (full name)**Grantham Environmental Trust** (UK entity)**GMO** (Grantham, Mayo, Van Otterloo & Co.) - source entity, not foundation itself

Principals (3)

Jeremy GranthamFounder, Co-Founder of GMOOWNS

$2B

ChildrenPrivateOWNS

Hanne GranthamCo-philanthropistOWNS

Related Entities (1)

GMO (Grantham, Mayo, Van Otterloo & Co.)Subsidiary

Co-founded 1977 Global investment management firm ~$60-65 billion AUM (fluctuates) Headquarters: Boston, MA Known for value investing, asset allocation strategies Jeremy Grantham served as Chief Investment Strategist until retirement from day-to-day management

Known Associates (2)

Academic Partners

Environmental Organizations

Relationship Strength

Loading relationships...

Changelog

2026-01-17Upgraded to High confidence. Verified net worth ~$1B+ via Bloomberg 2019 (98% pledged to climate). Cross-verified with Grantham Family Office file. GMO AUM at ~$38B.
2025-12-11Initial research file created for Grantham Foundation. Includes overview of Jeremy and Hanne Grantham, GMO background, Giving Pledge status (2013), environmental philanthropy focus, and foundation structure. Net worth estimated at ~$2B.
2025-12-26Added comprehensive team: Grantham Foundation leadership (Ramsay Ravenel President/CIO), GMO executives with LinkedIn (Scott Hayward CEO, Ben Inker Co-Head Asset Allocation, Dina Santoro COO, George Sakoulis Head Investment Teams, Roy Henriksson Head Risk), GMO board members, Grantham Institute at Imperial College London leadership, Grantham Research Institute at LSE leadership (Lord Stern Chair).