Overdeck Family Foundation Inc C/O Tanya M Sheehan
ActivePhilanthropy & Voluntarism
New York, NYWebsite
About Overdeck Family Foundation Inc C/O Tanya M Sheehan
Overdeck Family Foundation appears to be a highly focused education funder, with especially strong support for math learning, early literacy, and tools that improve teaching and family engagement. Its largest grants go to organizations like the National Museum of Mathematics, Khan Academy, Zearn, CommonLit, and TalkingPoints, suggesting a preference for scalable, evidence-oriented education models rather than direct service providers alone. It also shows a distinctive interest in the intersection of AI and education, funding convenings, research, and development work through partners such as Robin Hood, Saga Innovations, Teaching Lab, and New Venture Fund.
Focus Areas
Math learning and public math engagementEarly literacy and reading interventionsAI in K-9 education and ed-tech researchTeacher professional development and instructional improvementFamily engagement and parent support toolsOut-of-school-time STEM and enrichment programs
Giving Approach
Concentrated, strategy-driven giving with a mix of large multi-year operating grants and targeted project support; many grantees receive repeat funding, often tied to convenings, research, pilots, or scaling efforts in education innovation.
About Overdeck Family Foundation Inc C/O Tanya M Sheehan
Overdeck Family Foundation Inc c/o Tanya M Sheehan gives at a scale that is unusual even among major private funders: its recent grants include $63,400,533 in 2025, $53,464,779 in 2024, and $50,160,335 in 2023, all to New York recipients. The pattern points to a foundation that concentrates large commitments rather than spreading many smaller awards across a broad field. Recent activity also shows a strong emphasis on institutional-scale support, with grants landing in museum-class and other cultural organizations, alongside education-related initiatives. The foundation’s grantmaking is structured around defined programs such as Exceptional Educators, Future Readiness, School Readiness, Capacity-Building Support, and the AI Accelerator. Across those programs, the common thread is support for organizations that are building evidence, strengthening implementation, and scaling practice. The recipient list is narrow and highly concentrated, which suggests a relationship-driven approach focused on a small number of organizations that can absorb major gifts and long-horizon support. In practice, the foundation appears to back both direct program work and the infrastructure around it, including evaluation, technical assistance, and organizational growth.
What Overdeck Family Foundation Inc C/O Tanya M Sheehan Funds
Education is a major theme in the foundation’s recent grantmaking. Under the Exceptional Educators portfolio, it supports K-9 professional learning, coaching, aligned instructional materials, and team-based staffing models. It also funds Future Readiness work aimed at cognitive skills, meaningful connections, and agency, and School Readiness grants that help more children enter kindergarten prepared to thrive. Another clear thread is research and evidence. The Inspired Minds — OST STEM Research Call funded Education Northwest to conduct a landscape analysis of scaling out-of-school time STEM programming, showing an interest in how programs grow and what evidence supports that growth. The foundation also has an AI Accelerator for nonprofits working on responsible AI adoption and innovation in education settings.
How Overdeck Family Foundation Inc C/O Tanya M Sheehan Gives
Grant sizes are tightly clustered at the top end: the interquartile range runs from $50,986,446 to $52,638,668, with a median grant of $51,812,557. That points to a highly standardized major-gift strategy rather than varied check sizes. The recent grant record also suggests repeat, multi-year commitments, with large awards appearing in 2023, 2024, and 2025. Overdeck Family Foundation Inc c/o Tanya M Sheehan is classified as a regular funder, not a DAF or individual funder, and it does not make program-related investments. Several active programs emphasize capacity building, technical assistance, and evidence-building alongside direct grant support.
Financial Snapshot
Annual Giving
$63.4M
Total Assets
$920.4M
Total Revenue
$117.9M
Total Expenses
$77.1M
Typical Grant Size
Most grants fall between $155K and $673K, with a median of $300K.
25th Percentile
$155K
Median
$300K
75th Percentile
$673K
Geographic Reach
National27 states funded
About 16% of grants go to recipients in CA.
Funding intensity
LowHigh
Headquarters
Leadership
JOHN A OVERDECK
Director/President/Chairman
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