The Mason Green Foundation
The Mason Green Foundation is a private foundation focused on Diseases, Disorders & Medical Disciplines, based in Bartlesville, OK. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $5K in total assets. In 2024, it awarded 1 grant totaling $5K.
The Mason Green Foundation at a glance
In short: The Mason Green Foundation gave $5K across 1 grant in 2024 (avg $5K), mostly in Oklahoma. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $4,925
- +7.8% vs 2023
- Grants made (2024)
- 1
- -50.0% vs 2023
- Average grant
- $4,925
- +115.7% vs 2023
- Median grant
- $4,925
- Total assets
- $5,307
- -48.1% vs 2023
- Primary geography
- Oklahoma (100% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated September 2026.
Who The Mason Green Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2024
The largest 2024 recipient was Angel Flight Inc ($5K).
Grant Size Distribution
8 grants across all recorded years
The most common grant size was under $50K: 8 grants of 8 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2024 grant dollars on its one itemized grant.
Cities
How The Mason Green Foundation gives
- Giving fell 53% from 2021 to 2024. Method
- In 2024 it paid out well above 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 2020 to 2024, annual grant giving ranged from $5K (2023) to $11K (2021). In 2024 it made 1 grant totaling $5K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Angel Flight Inc Tulsa, OK | Donation | $4,925 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Distributable Amount |
|---|---|---|---|---|---|---|---|
| 2024 | $5,307 | — | $4,925 | $4,925 | 1 | $4,925 | $237 |
| 2023 | $10,232 | $14,088 | $5,039 | $4,567 | 2 | $4,567 | $256 |
| 2022 | $1,183 | $10,266 | $10,006 | $10,000 | 1 | $10,000 | $27 |
| 2021 | $923 | $11,499 | $10,583 | $10,500 | 2 | $10,500 | $11 |
| 2020 | $7 | $450 | $5,075 | $5,075 | 2 | — | $114 |
Under IRS private-foundation payout rules, The Mason Green Foundation reported a distributable amount of $237 for 2024 — the minimum it must pay out in qualifying distributions.
Leadership & Key People
Officers and directors from IRS filings
The Mason Green Foundation is led by Jeffrey A Green, President on every filing since 2020; none of the 3 officers listed in 2024 report compensation.
Officers on the 2024 filing
Jeffrey A Green
President
On filings since 2020
1 hr/week
No compensation reported
Stewart L Mueller
Director
On filings since 2020
1 hr/week
No compensation reported
Monica G Green
Secretary
On filings since 2020
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about The Mason Green Foundation
How much does The Mason Green Foundation give each year?
The Mason Green Foundation gave $5K across 1 grant in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $5K across 2 grants.
How large is The Mason Green Foundation?
The Mason Green Foundation reported $5K in total assets on its 2024 IRS Form 990-PF. It paid out $5K in qualifying distributions that year, against a required minimum of $237 (roughly 5% of its investment assets).
What is The Mason Green Foundation?
The Mason Green Foundation is a private foundation focused on Diseases, Disorders & Medical Disciplines, based in Bartlesville, OK. It holds $5K in total assets as of 2024.
Where does The Mason Green Foundation operate?
The Mason Green Foundation has awarded grants in Kansas, Missouri, Oklahoma.
What is The Mason Green Foundation's EIN?
The Mason Green Foundation's EIN (Employer Identification Number) is 47-5157492. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2024
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