AUSTIN, TX
International Sustainable Energy Foundation
Quick Facts
- EIN
- 87-2509491
- Location
- AUSTIN, TX
- Category
- Environment
- NTEE Code
- C99
- Total Assets
- $48.2M
- Annual Income
- $30.1M
- Annual Revenue
- $30.1M
- IRS Ruling Year
- 2021
- Tax Subsection
- 501(c)(03)
About This Organization
International Sustainable Energy Foundation is a nonprofit organization based in AUSTIN, TX. It received its IRS tax-exempt ruling in 2021. The organization is classified under IRC Section 501(c)(03). It operates in the area of environment. Total assets are reported at $48.2M. Annual income is $30.1M. The organization has received $11.9M in foundation grants from 2 funders.
Grants Received from Foundations
Foundation grants awarded to International Sustainable Energy Foundation, based on IRS 990-PF filings.
| Funder | Amount | Year | Purpose |
|---|---|---|---|
| Sequoia Climate Foundation | $4M | 2023 | TO PROVIDE GENERAL OPERATING SUPPORT |
| Sequoia Climate Foundation | $500K | 2023 | TO SUPPORT THE SCALING UP OF SUSTAINABLE AGRICULTURE AND LAND USE |
| David And Lucile Packard Foundation | $500K | 2023 | Environment and Science |
| Sequoia Climate Foundation | $460K | 2023 | TO SUPPORT INTEGRATING ROOFTOP SOLAR IN THE HEALTHCARE SECTOR |
| Sequoia Climate Foundation | $3.2M | 2022 | TO DEVELOP NET-ZERO ROADMAPS |
| Sequoia Climate Foundation | $3.2M | 2022 | TO DEVELOP NET-ZERO ROADMAPS |
Funding history
International Sustainable Energy Foundation appears in 6 foundation grant records totaling $12 million between 2022 and 2023, with a median grant of $1.9 million. Its strongest year in this record was 2022, with $6.4 million across 2 grants. The single largest grant on record is $4.0 million.
The grants come from 2 distinct funders; Sequoia Climate Foundation is the largest at $11 million across 5 grants, which is 96 percent of the recorded total. The other funder on record is David And Lucile Packard Foundation ($500,000).
| Year | Grants | Total |
|---|---|---|
| 2022 | 2 | $6.4M |
| 2023 | 4 | $5.5M |
Largest funders: Sequoia Climate Foundation, David And Lucile Packard Foundation.
Grant records from funders’ IRS Form 990-PF Part XV filings. Last verified September 2026.
Frequently Asked Questions
What does International Sustainable Energy Foundation do?
International Sustainable Energy Foundation is a nonprofit organization focused on environment, based in AUSTIN, TX. It is classified under IRC Section 501(c)(03).
Who funds International Sustainable Energy Foundation?
International Sustainable Energy Foundation has received foundation grants from Sequoia Climate Foundation, David And Lucile Packard Foundation, and others.
What is International Sustainable Energy Foundation's annual revenue?
International Sustainable Energy Foundation reports total assets of $48.2M. Annual income is $30.1M.
Where is International Sustainable Energy Foundation located?
International Sustainable Energy Foundation is located in AUSTIN, TX.
Is International Sustainable Energy Foundation a 501(c)(3)?
Yes, International Sustainable Energy Foundation is a 501(c)(3) tax-exempt organization. Its EIN is 87-2509491. Donations to this organization may be tax-deductible.
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