Residuary Tuw Marion Walters Wing
To provide "camperships" to camp joslin for needy boys with diabetes.
Residuary Tuw Marion Walters Wing at a glance
In short: Residuary Tuw Marion Walters Wing gave $299K across 1 grant in 2025 (avg $299K), mostly in Massachusetts. Source: 2025 IRS Form 990.
- Annual giving (2025)
- $298,882
- -61.8% vs 2024
- Grants made (2025)
- 1
- +0.0% vs 2024
- Average grant
- $298,882
- -61.8% vs 2024
- Median grant
- $298,882
- Total assets
- $9,718,161
- +8.1% vs 2024
- Primary geography
- Massachusetts (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Residuary Tuw Marion Walters Wing funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Barton Center for Diabetes Education Inc ($299K).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $250–500K range: 4 grants of 5 (80%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How Residuary Tuw Marion Walters Wing gives
- Giving held roughly steady from 2022 to 2025 (−1%). 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 $250K (2019) to $783K (2024). In 2025 it made 1 grant totaling $299K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Barton Center for Diabetes Education Inc North Oxford, MA | Provide Camperships and Capital Support | $298,882 |
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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 | $9,718,161 | $876,814 | $354,171 | $298,882 | 1 | $876,814 |
| 2024 | $8,992,913 | $921,628 | $840,620 | $782,900 | 1 | $921,628 |
| 2023 | $8,075,229 | $622,521 | $344,477 | $295,000 | 1 | $622,521 |
| 2022 | $7,844,755 | $273,456 | $352,819 | $302,000 | 1 | $273,456 |
| 2021 | $9,147,987 | $505,249 | $316,700 | $265,000 | 1 | $505,249 |
| 2020 | $7,679,859 | $308,937 | $303,941 | $252,000 | 1 | $308,937 |
| 2019 | $7,724,865 | $291,298 | $298,531 | $250,000 | 1 | $291,298 |
About Residuary Tuw Marion Walters Wing
Based on IRS filings
Residuary Tuw Marion Walters Wing is a public charity, based in Boston, MA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $9.7M in total assets. In 2025, it awarded 1 grant totaling $299K. Net investment income was $877K.
Leadership & Key People
Officers and directors from IRS filings
Residuary Tuw Marion Walters Wing's 2025 filing lists 4 officers; none of the 4 officers listed in 2025 report compensation.
Officers on the 2025 filing
Joan Mansfield MD
Trustee
On filings since 2019
0.4 hrs/week
No compensation reported
Mark Fuller
Trustee
On filings since 2019
0.4 hrs/week
No compensation reported
Richard Macdonald
Trustee
On filings since 2019
0.4 hrs/week
No compensation reported
Michael Kasparian
Trustee
On filings since 2020
0.4 hrs/week
No compensation reported
Former officers (1)
- Former: Dennis Guittarr (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.
Frequently asked questions about Residuary Tuw Marion Walters Wing
How much does Residuary Tuw Marion Walters Wing give each year?
Residuary Tuw Marion Walters Wing gave $299K across 1 grant in 2025, according to its 2025 IRS Form 990. In 2024 it gave $783K across 1 grant.
How large is Residuary Tuw Marion Walters Wing?
Residuary Tuw Marion Walters Wing reported $9.7M in total assets on its 2025 IRS Form 990. Its revenue that year was $877K.
Where does Residuary Tuw Marion Walters Wing operate?
Residuary Tuw Marion Walters Wing has awarded grants in Massachusetts.
What is Residuary Tuw Marion Walters Wing's EIN?
Residuary Tuw Marion Walters Wing's EIN (Employer Identification Number) is 23-7688668. 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
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2019 (received by the IRS March 4, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS March 5, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS March 7, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS March 9, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS February 28, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS February 14, 2025)
- Updated Form 990 for fiscal year 2025 (received by the IRS February 10, 2026)
- IRS filings on file for fiscal years 2019–2025
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