Marianne and George Markham Foundation
Historical funder research: IRS Form 990-PF filings from US private foundations, showing who funded what in past years. This is not a list of currently open grant calls, and we do not track open RFPs from private foundations. From public IRS Form 990-PF filings (latest on file for this funder: tax year 2025). Coverage: tax years 2019–2025. Freshness: the IRS releases these returns 1.5–2+ years after the tax year ends, so 2025 is still partial and a funder's newest grants may not appear yet. Last updated: November 14, 2026. Filings can contain errors, so confirm current priorities and deadlines with the funder before applying.
Year 2025 is still partial because many returns have not been filed or released yet. That is a freshness issue — coverage in our dataset is tax years 2019–2025.
Only 49.3% of this funder's organizational grants could be linked to an IRS cause code.
The foundation checked the box saying it contributes only to preselected organizations and doesn't accept unsolicited requests.
- Form & materials
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- Deadlines
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- Restrictions
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| Recipient | Location | Purpose (as filed) | Amount | Tax yr |
|---|---|---|---|---|
| Watch Tower Bible and Tract Society | Wallkill, NY | GENERAL | $5,000 | 2025 |
| American Civil Liberties Union FDN | New York, NY | GENERAL | $1,150 | 2025 |
| Stanford University | Stanford, CA | GENERAL | $1,000 | 2025 |
| Stanford University Law School | Stanford, CA | GENERAL | $750 | 2025 |
| Planned Parenthood of the Rocky Mountains | Denver, CO | GENERAL | $750 | 2025 |
| Natural Resources Defense Council | New York, NY | GENERAL | $750 | 2025 |
| Dancewave | Brooklyn, NY | GENERAL | $750 | 2025 |
| Intercambio De Comunidades | Boulder, CO | GENERAL | $700 | 2025 |
| Pro Publica Inc | New York, NY | GENERAL | $600 | 2025 |
| Doctors Without Borders | Hagerstown, MA | GENERAL | $550 | 2025 |
| Environment for Americas | Boulder, CO | GENERAL | $500 | 2025 |
| Wilderness Awareness School | Duvall, WA | GENERAL | $500 | 2025 |
| Drylands Agroecology Research Foundation | Longmont, CO | GENERAL | $500 | 2025 |
| Boulder County Nature Association | Boulder, CO | GENERAL | $500 | 2025 |
| Bird Conservancy of the Rockies | Brighton, CO | GENERAL | $500 | 2025 |
| Nature Conservancy | Arlington, VA | GENERAL | $500 | 2025 |
| Boulder County Audubon Society | Boulder, CO | GENERAL | $500 | 2025 |
| Rocky Mountain Public Media Philanthropic Giving | Denver, CO | General | $500 | 2025 |
| Union of Concerned Scientists | Cambridge, MA | GENERAL | $500 | 2025 |
| Yale University | New Haven, CT | GENERAL | $500 | 2025 |
| Westover School | Middlebury, CT | GENERAL | $500 | 2025 |
| Princeton University | Princeton, NJ | GENERAL | $500 | 2025 |
| Planned Parenthood of Greater Texas | Dallas, TX | GENERAL | $500 | 2025 |
| Planned Parenthood Federation of America | Washington, DC | GENERAL | $500 | 2025 |
| Save the Harborsave the Bay | Boston, MA | GENERAL | $400 | 2025 |
Grants to individuals are counted but not named.
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