Mainwaring Family Foundation
Mainwaring Family Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in Wilmington, DE. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $3.8M in total assets. In 2024, it awarded 8 grants totaling $178K. Net investment income was $193K.
Key facts about Mainwaring Family Foundation
- EIN
- 82-2289585
- Latest 990 filing
- Form 990-PF, 2024
- Annual giving (2024)
- $178,112
- Grants made (2024)
- 8
- Average grant
- $22,264
- Median grant
- $11,000
- Total assets
- $3,815,385
- Primary geography
- Montana (100% of itemized 2024 grant dollars)
Data from IRS Form 990-PF, 2024; updated September 2026.
Who Mainwaring Family Foundation funds
By grant dollars, the top recipient states for Mainwaring Family Foundation's 8 itemized 2024 grants were Montana (100%). The most frequent recipient cities were Helena, MT (4 grants). 100% of grants with a stated purpose were for general or operating support.
How Mainwaring Family Foundation gives
- Giving grew 30% from 2021 to 2024. Method
- In 2024 it paid out 92% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
From the foundation's IRS Form 990-PF filings. Methodology.
Next steps with Mainwaring Family Foundation
- How to evaluate Mainwaring Family Foundation as a funder
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Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$3.8M
-0.2% YoY
Annual Giving
$178K
+1.0% YoY
Grant Count
8
-20.0% YoY
Avg Grant Size
$22K
+26.2% YoY
Under IRS private-foundation payout rules, Mainwaring Family Foundation reported a distributable amount of $218K for 2024 — the minimum it must pay out in qualifying distributions.
About Mainwaring Family Foundation
Based on IRS filings
Mainwaring Family Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in Wilmington, DE. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $3.8M in total assets. In 2024, it awarded 8 grants totaling $178K. Net investment income was $193K.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of all 8 itemized 2024 grant dollars.
Cities
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $3,815,385 | $3,823,677 | $3,967,148 |
| Revenue | $203,423 | $63,884 | $130,803 |
| Expenses | $211,712 | $207,353 | $235,370 |
| Qualifying Distributions | $199,863 | $195,684 | $220,595 |
| Net Investment Income | $192,634 | $54,798 | $119,943 |
| Distributable Amount | $218,289 | $197,374 | $198,526 |
Data update history
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2024
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 8 recipients in 2024
Grant Size Distribution
41 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest recipients include Helena Symphony ($65,000), Holter Museum of Art ($45,000), Helena Food Share ($16,112).
| Recipient | Purpose | Amount |
|---|---|---|
| HELENA SYMPHONY Helena, MT | UNRESTRICTED GIFT | $65,000 |
| HOLTER MUSEUM OF ART Helena, MT | GENERAL PURPOSE | $45,000 |
| HELENA FOOD SHARE Helena, MT | GENERAL PURPOSE | $16,112 |
| MONTANA FOOD BANK NETWORK Missoula, MT | GENERAL PURPOSE | $12,000 |
| AMERICAN PRAIRIE FOUNDATION Bozeman, MT | GENERAL PURPOSE | $10,000 |
| GLACIER TWO MEDICINE ALLIANCE East Glacier Park, MT | GENERAL PURPOSE | $10,000 |
| PLANNED PARENTHOOD OF MONTANA Billings, MT | GENERAL PURPOSE | $10,000 |
| PRICKLY PEAR LAND TRUST Helena, MT | GENERAL PURPOSE | $10,000 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
No officer or director reported compensation in the available filings.
From 2024 IRS filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| Scott Mainwaring | Trustee | 1 | — |
| Susan Benedict | Trustee | 1 | — |
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What is Mainwaring Family Foundation?
Mainwaring Family Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in Wilmington, DE. It holds $3.8M in total assets as of 2024.
How large is Mainwaring Family Foundation?
As of 2024, Mainwaring Family Foundation holds $3.8M in total assets with $203K in annual revenue. It awarded 8 grants totaling $178K in 2024.
Where does Mainwaring Family Foundation operate?
Mainwaring Family Foundation has awarded grants in District of Columbia, Maryland, Montana, Pennsylvania, Virginia.
What size grants does Mainwaring Family Foundation award?
In 2024, Mainwaring Family Foundation awarded 8 grants totaling $178K — an average of about $22K per grant, based on its IRS Form 990 filings.
How much is Mainwaring Family Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, Mainwaring Family Foundation reported a distributable amount of $218K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Mainwaring Family Foundation's EIN?
Mainwaring Family Foundation's EIN (Employer Identification Number) is 82-2289585. IRS Form 990 filing data is available on this page for 2020–2024.
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Data last updated September 2026. Sourced from IRS Form 990-PF filings.