Mainwaring Family Foundation
The Mainwaring Family Foundation is a private foundation based in Wilmington, Delaware. It made 10 grants totaling $196,538 in 2025 to organizations in Montana, including arts, conservation, food assistance, and other organizations.
Mainwaring Family Foundation at a glance
In short: Mainwaring Family Foundation gave $197K across 10 grants in 2025 (avg $20K), mostly in Montana. 20% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $196,538
- +10.3% vs 2024
- Grants made (2025)
- 10
- +25.0% vs 2024
- Average grant
- $19,654
- -11.7% vs 2024
- Median grant
- $12,000
- Total assets
- $19,480,397
- +410.6% vs 2024
- New grantees (estimate)
- 20% first-time grantees (2 of 10, 2025; small sample)
- Primary geography
- Montana (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Mainwaring Family Foundation
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation does not accept unsolicited requests for funds and states that it contributes only to preselected charitable organizations.
- Contact
Mailing address: 4250 Lancaster Pike Suite 150, Wilmington, DE 19805
Phone: (212) 493-8000
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Mainwaring Family Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was Helena Symphony ($65K). Together the top 10 received $197K.
Grant Size Distribution
45 grants across all recorded years
The most common grant size was under $50K: 40 grants of 45 (89%).
Geographic Focus
Where this funder awards grants
All 2025 grant dollars went to recipients in Montana.
Grant Distribution by State
Share of 2025 grant dollars across all 10 itemized grants.
Cities
Is Mainwaring Family Foundation open to new grantees?
20%
first-time grantees, 2025
In 2025, 2 of 10 grantees (20%) were first-time recipients. With only 10 grantees, that is a small sample: one grantee more or less moves the share by about 10 points. First grants averaged $6K; repeat grants $23K. How we count
Medians: $6K first-time, $14K repeat.
- 80% of 2025 grantees were also funded in 2024. Method
- Giving held roughly steady from 2022 to 2025 (−2%). Method
- In 2025 it paid out 62% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2020–2025). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2025, annual grant giving ranged from $80K (2020) to $200K (2022). In 2025 it made 10 grants totaling $197K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Helena Symphony Helena, MT | Unrestricted Gift | $65,000 |
| Holter Museum of Art Helena, MT | General Purpose | $45,000 |
| American Prairie Foundation Bozeman, MT | General Purpose | $15,000 |
| Prickly Pear Land Trust Helena, MT | General Purpose | $15,000 |
| Helena Food Share Helena, MT | General Purpose | $12,000 |
| Montana Food Bank Network Missoula, MT | General Purpose | $12,000 |
| Glacier Two Medicine Alliance East Glacier Park, MT | General Purpose | $10,000 |
| Planned Parenthood of Montana Billings, MT | General Purpose | $10,000 |
| Omerta Arts Syndicate Helena, MT | General | $7,538 |
| H-Town Eagles Boxing Club Helena, MT | General | $5,000 |
Ready to take the next step with Mainwaring Family Foundation?
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 | $19,480,397 | $20,467,587 | $236,189 | $196,538 | 10 | $216,931 | $453,262 | $351,964 |
| 2024 | $3,815,385 | $203,423 | $211,712 | $178,112 | 8 | $199,863 | $192,634 | $218,289 |
| 2023 | $3,823,677 | $63,884 | $207,353 | $176,422 | 10 | $195,684 | $54,798 | $197,374 |
| 2022 | $3,967,148 | $130,803 | $235,370 | $200,000 | 8 | $220,595 | $119,943 | $198,526 |
| 2021 | $4,071,715 | $304,715 | $174,006 | $137,125 | 9 | $160,060 | $291,597 | $226,426 |
| 2020 | $3,941,011 | $18,463 | $97,327 | $79,500 | 6 | — | $40,546 | $198,025 |
| 2019 | $4,019,881 | $4,019,886 | $107 | — | — | — | $19,879 | $196,969 |
Under IRS private-foundation payout rules, Mainwaring Family Foundation reported a distributable amount of $352K for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No mission statement for the foundation is provided. Its 2025 grants included support for arts organizations, land conservation, wildlife conservation, food assistance, reproductive health, and boxing. These are descriptions of the kinds of organizations it supported, not a stated foundation mission.
Among its grantees, the Holter Museum of Art describes its mission as advancing artistic excellence through innovative exhibits, inspiring creativity through educational programs, and facilitating community connections through the arts. Prickly Pear Land Trust says it works to connect people with west-central Montana’s landscapes, water, wildlife, recreation, and agricultural heritage through conservation. American Prairie Foundation states that its mission is to create the largest nature reserve in the contiguous United States. Montana Food Bank Network describes its mission as ending hunger in Montana through food acquisition and distribution, education, and advocacy; Helena Food Share says it serves neighbors in need with food and works with others to eliminate hunger in the greater Helena area.
Grantmaking
In 2025, the foundation made 10 grants totaling $196,538. Grants ranged from $5,000 to $65,000, with a median grant of $12,000.
Its largest 2025 grants included $65,000 to Helena Symphony, $45,000 to Holter Museum of Art, $15,000 each to American Prairie Foundation and Prickly Pear Land Trust, and $12,000 each to Helena Food Share and Montana Food Bank Network. Other recipients included Glacier Two Medicine Alliance ($10,000), Planned Parenthood of Montana ($10,000), Omerta Arts Syndicate ($7,538), and H-Town Eagles Boxing Club ($5,000).
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Scott Mainwaring and Susan Benedict as trustees.
Mainwaring Family Foundation's 2025 filing lists 2 officers; none of the 2 officers listed in 2025 report compensation.
Officers on the 2025 filing
Scott Mainwaring
Trustee
On filings since 2019
1 hr/week
No compensation reported
Susan Benedict
Trustee
On filings since 2019
1 hr/week
No compensation reported
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 Mainwaring Family Foundation
How much does Mainwaring Family Foundation give each year?
Mainwaring Family Foundation gave $197K across 10 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $178K across 8 grants.
What is Mainwaring Family Foundation's typical grant size?
Mainwaring Family Foundation's median grant in 2025 was $12,000, and its average grant was $19,654, across 10 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Mainwaring Family Foundation that year got $6K on average.
Where does Mainwaring Family Foundation give grants?
Mainwaring Family Foundation gives mostly in Montana: 100% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The most frequent recipient cities were Helena, MT (6 grants).
Does Mainwaring Family Foundation give general operating support?
Yes: 100% of Mainwaring Family Foundation's 2025 grants with a stated purpose (10 of 10) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Mainwaring Family Foundation's largest grantees?
Mainwaring Family Foundation's largest 2025 grantees include Helena Symphony ($65,000), Holter Museum of Art ($45,000) and American Prairie Foundation ($15,000), according to its 2025 IRS Form 990-PF. Together they received 64% of its itemized 2025 grant dollars.
How large is Mainwaring Family Foundation?
Mainwaring Family Foundation reported $19.5M in total assets on its 2025 IRS Form 990-PF. It paid out $217K in qualifying distributions that year, against a required minimum of $352K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
What does Mainwaring Family Foundation fund?
No mission statement for the foundation is provided. Its 2025 grants included support for arts organizations, land conservation, wildlife conservation, food assistance, reproductive health, and boxing. See mission & focus areas ↑
How do I apply for a grant from Mainwaring Family Foundation?
The foundation does not accept unsolicited requests for funds and states that it contributes only to preselected charitable organizations. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
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 2019–2025.
Does Mainwaring Family Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
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 July 7, 2020)
- Added Form 990-PF for fiscal year 2025 (received by the IRS May 12, 2026)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Mainwaring Family Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
- Nixa Affiliate Grantmaking Program Up to US $10,000 · Due October 19, 2026
- Community and School Grants $28,000 total pool; 10-15 grants expected · Due October 19, 2026
- Mary Pinola/Crescenta Valley Chamber Education Fund $500 - $5,000 for ongoing programs; up to $15,000 for Strategic Initiative Grants · Due October 19, 2026
Explore Open Grants
Browse active grant opportunities in Mainwaring Family Foundation's focus areas in our free grants database
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Cite this profile
Grantable. (2026). Mainwaring Family Foundation funder profile. GrantGraph. Retrieved October 18, 2026, from https://grantable.co/funders/mainwaring-family-foundation-morg_320b7023950a43e6b5cae611fa5ec8f1
BibTeX
@misc{grantable_822289585_2026,
author = {{Grantable}},
title = {{Mainwaring Family Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/mainwaring-family-foundation-morg_320b7023950a43e6b5cae611fa5ec8f1},
note = {Accessed 2026-10-18. Data licensed CC BY 4.0}
}The figures on this page are open data under CC BY 4.0: reuse them with credit to Grantable and a link. Download the data.
Figures come from Mainwaring Family Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
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