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Grantham Foundation

53 State Street, 33rd Floor, Boston, MA, 02109, United States

Overview

Grantham Foundation seeks to protect and improve the health of global environmental issues and supports individuals and organizations. It also supports communication and collaboration in environmental protection, with an emphasis on climate change. The foundation focuses on communications to enable the general public to understand that climate change represents the world’s primary environmental threat today and that mitigating and adapting to a changing climate will lead to a more sustainable and prosperous future. Grantham Foundation was founded in 1997 by Jeremy and Hannelore Grantham and is based in Boston, Massachusetts, USA.

Total investments
40
Lead investments
12
Investments · 12mo
9
Active investors
7

Sector focus

  • Environmental Consulting
  • Health Care
  • Natural Resources
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Investment portfolio

  • Princeton Critical Minerals

    Participated · Series A · Aug 2026

    Princeton Critical Minerals develops and commercializes an integrated technology platform for extracting lithium from brine, including products named Lilypad™, SmartPond™, and E-LiTE™. The company is operating field deployments that produce validation data under industrial conditions. With the new financing, PCM plans to scale manufacturing and expand commercial deployments while building U.S.-based production capabilities. The firm aims to continue advancing its core extraction technologies toward full commercial execution. The company also reported growth in its team as it prepares to execute on upcoming milestones.

  • Quercus Biosolutions

    Participated · Seed · Jul 2026

    Quercus Biosolutions leverages generative AI tools adapted from drug discovery to design novel mini proteins that bind validated biological targets in weeds. Unlike traditional approaches that screen naturally occurring proteins, the company designs proteins from scratch to potentially overcome mechanisms of resistance to conventional small-molecule herbicides. It currently runs five active programs and has multiple field trials underway. The company plans to expand its herbicide pipeline and pursue regulatory work to advance at least one product toward late-stage development. Quercus is also exploring broader applications of its platform against fungi, insects and other agricultural pests. The recent $5 million seed raise will fund these development and regulatory efforts.

  • Hephae Energy Technology

    Participated · Series A · Jul 2026

    Hephae Energy Technology develops ultrahigh-temperature robotics, including drilling systems designed to enable precise well positioning for geothermal projects by overcoming temperature and reliability limitations of conventional drilling tools. Its technology aims to access deeper, hotter rock to support expanded geothermal energy development and to increase drilling speed and reliability. The company is led by CEO Steve Krase and is based in Houston, TX. Financially, Hephae has now raised a total of $24.7M following its $17.8M Series A. The newly raised funds are intended to accelerate commercial deployment of its advanced drilling systems and move the company toward broader market commercialization.

  • Via Separations

    Participated · Equity · Apr 2026

    Via Separations develops modular filtration process solutions that electrify chemical separations, claiming reductions in energy needed for separations by up to 90 percent. Its technology has proven commercial performance in the pulp and paper sector, and the company plans to accelerate deployment into the refining and chemical industries. Via’s solutions aim to lower energy use, improve uptime and strengthen operational resilience while reducing emissions. The company is led by CEO Shreya Dave and recently raised $36M in new funding from a group including Climate Investment, Aramco Ventures and Marathon Petroleum Corporation, alongside existing investors.

  • V-Glass

    Led · Seed · Mar 2026

    V-Glass develops next-generation vacuum insulated glass (VIG) that the company says delivers 2–3x the thermal performance of ENERGY STAR® windows, lasts twice as long, and can be produced at no greater manufacturing cost. Its technology emphasizes affordability, 100% recyclability, and use of non-toxic materials compared with existing insulated glass units. The company plans to use recent funding to advance automation and manufacturing methods and to move from lab-scale production into a pilot plant. V-Glass has a long-standing (15-year) relationship with the DOE and national labs, which has supplied non-dilutive funding and technical support, and it recently won a $1M ARPA-E grant. It also secured a contract with the U.S. Army Engineer Research and Development Center (ERDC). The company is based in Waukesha, Wisconsin.

Team

  • Hannelore Grantham

    Co-Founder

  • Jeremy Grantham

    Co-Founder

  • Sam Lefkofsky

    Analyst

    LinkedIn
  • Josh Agenbroad

    Co-Founder & Industry Sector Lead

    LinkedIn