From public IRS filings
INSTITUTE FOR SUSTAINABLE COMMUNITIES
MONTPELIER, VT · International Affairs
Mission
THE INSTITUTE FOR SUSTAINABLE COMMUNITIES (ISC) IS AN INTERNATIONAL, 501(C)(3) NONPROFIT ORGANIZATION THAT BRINGS PARTNERS, EXPERTISE, AND FUNDING TO COMMUNITIES THAT ARE MOST VULNERABLE TO CLIMATE CHANGE AND THE EFFECT IT HAS ON THE LIVES OF PEOPLE IN THE U.S. AND ABROAD.
Financials (IRS Form 990)
Total revenue
$5M
Total expenses
$8M
Total assets
$4.2M
Source: IRS Form 990, tax year 2025.
Who funds INSTITUTE FOR SUSTAINABLE COMMUNITIES
$21.3M in foundation grants on record from 21 funders — from IRS 990 grant line items.
| Funder | Total given | Grants |
|---|---|---|
| Tides Foundation | $5.9M | 2 |
| American Online Giving Foundation | $500K | 1 |
| Energy Foundation | $320K | 3 |
| Climate Imperative Foundation | $300K | 1 |
| Fidelity Investments Charitable Gift Fund | $240K | 2 |
| World Resources Institute | $157K | 1 |
| National Philanthropic Trust | $67K | 2 |
| Vanguard Charitable Endowment Program | $50K | 1 |
| Donor Advised Charitable Giving | $29K | 2 |
| American Endowment Foundation | $10K | 1 |
Leadership
REBECCA KADURU (Principal officer)
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