Steven Prewitt Skull Base
Steven Prewitt Skull Base is a private foundation focused on Medical Research, based in San Diego, CA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $780K in total assets. In 2025, it awarded 4 grants totaling $51K. Net investment income was $35K.
Steven Prewitt Skull Base at a glance
In short: Steven Prewitt Skull Base gave $51K across 4 grants in 2025 (avg $13K), mostly in California. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $50,800
- +19.5% vs 2024
- Grants made (2025)
- 4
- -20.0% vs 2024
- Average grant
- $12,700
- +49.4% vs 2024
- Median grant
- $12,500
- Total assets
- $779,549
- +21.8% vs 2024
- Primary geography
- California (70% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
Who Steven Prewitt Skull Base funds
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2025
The largest 2025 recipient was Scripps Health Foundation ($16K). Together the top 4 received $51K.
Grant Size Distribution
14 grants across all recorded years
The most common grant size was under $50K: 14 grants of 14 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2025 grant dollars across all 4 itemized grants.
States
Cities
How Steven Prewitt Skull Base gives
- Giving grew 54% from 2022 to 2025. Method
- In 2025 it paid out 200% of its IRS minimum distribution (the 5% rule). Method
From the foundation's IRS Form 990-PF 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 $30K (2019) to $51K (2025). In 2025 it made 4 grants totaling $51K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Scripps Health Foundation San Diego, CA | General | $15,800 |
| Resource Exchange International Inc Colorado Springs, CO | General | $15,000 |
| San Diego Air & Space Museum San Diego, CA | General | $10,000 |
| San Diego Automotive Museum San Diego, CA | General | $10,000 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $779,549 | $39,246 | $80,102 | $50,800 | 4 | $78,145 | $34,871 | $39,017 |
| 2024 | $640,284 | $33,451 | $70,052 | $42,500 | 5 | $42,500 | $5,899 | $31,665 |
| 2023 | $657,917 | $28,293 | $40,271 | $35,000 | 1 | $35,000 | $23,022 | $31,861 |
| 2022 | $684,817 | $34,284 | $40,216 | $33,000 | 2 | $33,000 | $1,934 | $33,173 |
| 2021 | $665,140 | $51,512 | $50,506 | $34,000 | 2 | $34,000 | $312 | $33,102 |
| 2020 | $664,134 | $51,033 | $65,620 | $33,500 | 1 | — | $13,833 | $33,644 |
| 2019 | $684,990 | $103,475 | $54,572 | $30,000 | 1 | — | $61,251 | $33,757 |
Under IRS private-foundation payout rules, Steven Prewitt Skull Base reported a distributable amount of $39K for 2025 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
Steven Prewitt Skull Base is led by Perry T. Mansfield MD, Chair since 2022 (on filings since 2019); 1 of 4 officers listed in 2025 is compensated.
Officers on the 2025 filing
Perry T. Mansfield MD
Chair
President → Chair, 2022
On filings since 2019
4 hrs/week
$24K (2025)
James Kiderick
Board Member
Director → Board Member, 2025
On filings since 2019
1 hr/week
No compensation reported
Michael O'Leary
Board Member
Director → Board Member, 2022
On filings since 2019
1 hr/week
No compensation reported
Bobbi Bennett
Treasurer
Board Member Treasurer → Treasurer, 2025
On filings since 2022
1 hr/week
No compensation reported
Former officers (3)
- Former: Jim Kiderick (2022–2024) — Board Member
- Former: Bobbi Bennett Ma (2019–2021) — Secretary
- Former: Jason Toranto (2019–2021) — Director
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 $24K, to Perry Mansfield (Chair).
Frequently asked questions about Steven Prewitt Skull Base
How much does Steven Prewitt Skull Base give each year?
Steven Prewitt Skull Base gave $51K across 4 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $43K across 5 grants.
What is Steven Prewitt Skull Base's typical grant size?
Steven Prewitt Skull Base's median grant in 2025 was $12,500, and its average grant was $12,700, across 4 grants on its 2025 IRS Form 990-PF.
Where does Steven Prewitt Skull Base give grants?
Steven Prewitt Skull Base gives mostly in California: 70% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest state was Colorado (30%). The most frequent recipient cities were San Diego, CA (3 grants).
Does Steven Prewitt Skull Base give general operating support?
Yes: 100% of Steven Prewitt Skull Base's 2025 grants with a stated purpose (4 of 4) were for general or operating support, per its 2025 IRS Form 990-PF.
How large is Steven Prewitt Skull Base?
Steven Prewitt Skull Base reported $780K in total assets on its 2025 IRS Form 990-PF. It paid out $78K in qualifying distributions that year, against a required minimum of $39K (roughly 5% of its investment assets).
What is Steven Prewitt Skull Base?
Steven Prewitt Skull Base is a private foundation focused on Medical Research, based in San Diego, CA. It holds $780K in total assets as of 2025.
What is Steven Prewitt Skull Base's EIN?
Steven Prewitt Skull Base's EIN (Employer Identification Number) is 26-1442469. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(3)
When this profile's IRS filing data changed on Grantable
- Added Form 990-PF for fiscal year 2019 (received by the IRS May 5, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 15, 2026)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Steven Prewitt Skull Base funds
Medical Research Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Steven Prewitt Skull Base's focus areas in our free grants database
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