Mayfield Education and Research Foundation
Neuroscience research & education.
Mayfield Education and Research Foundation at a glance
In short: Mayfield Education and Research Foundation gave $213K across 2 grants in 2025 (avg $106K), mostly in North Carolina. Source: 2025 IRS Form 990.
- Annual giving (2025)
- $212,500
- +150.0% vs 2024
- Grants made (2025)
- 2
- -33.3% vs 2024
- Average grant
- $106,250
- +275.0% vs 2024
- Median grant
- $106,250
- Total assets
- $11,110,243
- +19.2% vs 2024
- Primary geography
- North Carolina (95% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Mayfield Education and Research Foundation funds
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2025
The largest 2025 recipient was UNC Health Foundation ($203K). Together the top 2 received $213K.
Grant Size Distribution
8 grants across all recorded years
The most common grant size was under $50K: 6 grants of 8 (75%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 2 itemized grants.
Cities
How Mayfield Education and Research Foundation gives
- Giving grew 608% from 2022 to 2025. Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $6K (2019) to $213K (2025). In 2025 it made 2 grants totaling $213K.
Hatched bars: grants paid as reported on the IRS filing, which lists no individual grants for that year.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| UNC Health Foundation Chapel Hill, NC | Brain Tumor Research | $202,500 |
| Cox Health Foundation Springfield, MO | Neurosurgery Clinic | $10,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $11,110,243 | $1,824,779 | $1,519,563 | $212,500 | 2 | $174,219 |
| 2024 | $9,319,272 | $2,045,989 | $1,010,844 | $85,000 | 3 | $147,752 |
| 2023 | $6,428,572 | $913,355 | $990,433 | $10,000 | 1 | $42,511 |
| 2022 | $5,683,899 | $3,358,575 | $1,201,850 | $30,000 | 2 | $2,421,207 |
| 2021 | $4,816,635 | $1,122,381 | $440,664 | — | — | $369,049 |
| 2020 | $4,134,918 | $767,170 | $1,003,453 | $8,000 | 1 | $136,915 |
| 2019 | $4,371,201 | $1,051,549 | $912,712 | $6,000 | Total only | $264,319 |
"Total only": grants paid as reported on the IRS filing, which lists no individual grants for that year.
About Mayfield Education and Research Foundation
Based on IRS filings
Mayfield Education and Research Foundation is a public charity focused on Health, based in Cincinnati, OH. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $11.1M in total assets. In 2025, it awarded 2 grants totaling $213K. Net investment income was $174K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Mayfield Education and Research Foundation is led by William D. Tobler MD, Chairman since 2025 (on filings since 2019); 3 of 21 officers listed in 2025 are compensated.
Officers on the 2025 filing
William D. Tobler MD
Chairman
President → Chairman, 2025
On filings since 2019
4 hrs/week
$65K (2025)
Deborah Livingston
Development Director
New on the 2025 filing
40 hrs/week
$128K (2025)
Sonia Lipp
Director of Research
New on the 2025 filing
40 hrs/week
$145K (2025)
Andrew J. Ringer MD
Trustee
On filings since 2019
1 hr/week
No compensation reported
James J. McGraw Jr. Esq.
Trustee
On filings since 2019
1 hr/week
No compensation reported
Jeffrey T. Keller PhD
Trustee
On filings since 2019
1 hr/week
No compensation reported
Valerie Newell CPA
Trustee
On filings since 2019
1 hr/week
No compensation reported
Victor Dipilla
Trustee
On filings since 2019
1 hr/week
No compensation reported
Laura Guggenheim
Trustee
On filings since 2021
1 hr/week
No compensation reported
Vincent Dinapoli MD PhD
Trustee
On filings since 2021
1 hr/week
No compensation reported
Bryan Krueger MD
Trustee
On filings since 2022
1 hr/week
No compensation reported
Lauren R. Ostling MD
Trustee
On filings since 2022
1 hr/week
No compensation reported
Bradbury A. Skidmore MD
Trustee
On filings since 2023
1 hr/week
No compensation reported
James Horn MD
Trustee
On filings since 2023
1 hr/week
No compensation reported
Marla Santos Silliman
Trustee
On filings since 2023
1 hr/week
No compensation reported
Michael Stenger
Trustee
On filings since 2024
1 hr/week
No compensation reported
Amy Murray
Trustee
New on the 2025 filing
0.3 hrs/week
No compensation reported
Brian Gwyn
Trustee - Start & Exit
New on the 2025 filing
0.3 hrs/week
No compensation reported
Kevin Schuler
Trustee - Start
New on the 2025 filing
1 hr/week
No compensation reported
Michael J. Radomski
Treasurer
On filings since 2019
3 hrs/week
No compensation reported
Robert Rich Esq.
Secretary
On filings since 2019
1 hr/week
No compensation reported
Former officers (7)
- Former: Amy Murray Start (2024) — Trustee
- Former: Mike Stenger (2023) — Trustee
- Former: Brad Skidmore MD (2019–2022) — Trustee
- Former: Creighton Wright (2019–2021) — Trustee
- Former: George Mandybur MD (2019–2021) — Trustee
- Former: Liz Carter (2019–2020) — Trustee
- Former: Ronald Warnick MD (2019–2020) — Trustee
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $145K, to Sonia Lipp (Director of Research). 3 officers or directors reported compensation on that filing.
Frequently asked questions about Mayfield Education and Research Foundation
How much does Mayfield Education and Research Foundation give each year?
Mayfield Education and Research Foundation gave $213K across 2 grants in 2025, according to its 2025 IRS Form 990. In 2024 it gave $85K across 3 grants.
How large is Mayfield Education and Research Foundation?
Mayfield Education and Research Foundation reported $11.1M in total assets on its 2025 IRS Form 990. Its revenue that year was $1.8M.
What is Mayfield Education and Research Foundation?
Mayfield Education and Research Foundation is a public charity focused on Health, based in Cincinnati, OH. It holds $11.1M in total assets as of 2025.
Where does Mayfield Education and Research Foundation operate?
Mayfield Education and Research Foundation has awarded grants in Minnesota, Missouri, North Carolina, New Jersey, New York, Ohio.
What is Mayfield Education and Research Foundation's EIN?
Mayfield Education and Research Foundation's EIN (Employer Identification Number) is 31-0921099. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Added Form 990 for fiscal year 2025 (received by the IRS August 24, 2026)
- Updated Form 990 for fiscal year 2019 (received by the IRS August 17, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS August 11, 2021)
- Updated Form 990 for fiscal year 2022 (received by the IRS August 15, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS August 14, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS August 15, 2025)
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