Maas Foundation Inc
Maas Foundation Inc is a private foundation based in Pewaukee, Wisconsin. It supports charitable organizations through grants; its 2025 filing lists 38 grants totaling $135,550.
Maas Foundation Inc at a glance
In short: Maas Foundation Inc gave $136K across 38 grants in 2025 (avg $4K), top state Wisconsin. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $135,550
- +35.1% vs 2024
- Grants made (2025)
- 38
- +40.7% vs 2024
- Average grant
- $3,567
- -4.0% vs 2024
- Median grant
- $2,750
- Total assets
- $1,424,250
- -3.8% vs 2024
- Primary geography
- Wisconsin (28% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated September 2026.
How to apply to Maas Foundation Inc
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests.
- Contact
Mailing address: N27 W23921 Paul Road, Pewaukee, WI 53072
Phone: (847) 420-8437
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Maas Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was University of Wisconsin Foundation ($20K). Together the top 10 received $72K.
Organizations only. It also paid 2 grants to individuals ($6,500), which are not listed by name.
Grant Size Distribution
133 grants across all recorded years
The most common grant size was under $50K: 133 grants of 133 (100%).
Geographic Focus
Where this funder awards grants
In 2025, Wisconsin received the largest share of grant dollars (28%), followed by California (18%), Florida (15%), Illinois (12%), and the District of Columbia (5%). Grants also went to organizations in other states.
Grant Distribution by State
Share of 2025 grant dollars across all 38 itemized grants.
States
Cities
How Maas Foundation Inc gives
- 43% of 2025 grantees were also funded in 2024. Method
- Giving grew 50% from 2022 to 2025. Method
- In 2025 it paid out 196% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (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 2019 to 2025, annual grant giving ranged from $43K (2019) to $136K (2025). In 2025 it made 38 grants totaling $136K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Wisconsin Foundation Milwaukee, WI | Sonja J Maas Scholarship - Education Fund | $20,250 |
| Los Angeles Philharmonic Association Los Angeles, CA | To Further Organization's Charitable Purposes | $10,000 |
| 2 grants to individuals Recipients not named | — | $6,500 |
| Lee Memorial Health System Foundation Inc Fort Myers, FL | To Further Organization's Charitable Purposes | $6,000 |
| Milwaukee Repertory Theater Milwaukee, WI | To Further Organization's Charitable Purposes | $6,000 |
| Colonial Williamsburg Foundation Williamsburg, VA | To Further Organizations Charitable Purposes | $5,000 |
| KCRW Santa Monica, CA | To Further Organization's Charitable Purposes | $5,000 |
| Medshare Decatur, GA | To Further Organization's Charitable Purposes | $5,000 |
| Noble Network Charter Schools Chicago, IL | To Further Organization's Charitable Purposes | $5,000 |
| American Forests Washington, DC | To Further Organization's Charitable Purposes | $5,000 |
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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 | $1,424,250 | $87,415 | $143,975 | $135,550 | 38 | $137,346 | $81,830 | $69,900 |
| 2024 | $1,480,810 | $68,233 | $110,503 | $100,300 | 27 | $100,300 | $54,981 | $68,248 |
| 2023 | $1,522,342 | $51,352 | $89,971 | $82,000 | 26 | $82,000 | $36,167 | $62,946 |
| 2022 | $1,567,784 | $32,384 | $92,149 | $90,500 | 25 | $90,500 | $47,921 | $65,985 |
| 2021 | $1,625,578 | $1,698,016 | $80,692 | $70,700 | 17 | $70,700 | $58,273 | $44,718 |
| 2020 | $8,254 | $85,000 | $124,491 | $123,101 | 4 | — | — | $2,010 |
| 2019 | $47,745 | — | $44,372 | $42,750 | 4 | — | — | $2,682 |
Under IRS private-foundation payout rules, Maas Foundation Inc reported a distributable amount of $70K 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 foundation mission statement is provided. Its grants show support for organizations working in areas including education, arts and culture, health, social services, children’s programs, and the environment.
For example, the University of Wisconsin Foundation describes its mission as advancing the objectives of the University of Wisconsin–Madison by encouraging interest, engagement, and financial support. The Los Angeles Philharmonic Association says its performances, media initiatives, and learning programs aim to inspire and strengthen communities. Metropolitan Family Services describes its mission as providing and mobilizing services to strengthen families and communities.
Grantmaking
In 2025, the foundation made 38 grants totaling $135,550. Grants ranged from $250 to $20,250, with a median of $2,750. The largest grant was $20,250 to the University of Wisconsin Foundation for the Sonja J Maas Scholarship – Education Fund. Other notable grants included $10,000 to the Los Angeles Philharmonic Association and $6,000 each to an individual recipient Coast University Foundation, Lee Memorial Health System Foundation, and Milwaukee Repertory Theater.
The foundation made 27 grants totaling $100,300 in 2024 and 26 grants totaling $82,000 in 2023.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Thomas E Maas as president/director, Duane A Maas as director, Thomas J Maas as secretary/treasurer, and Jon K Maas as director.
Maas Foundation Inc is led by Thomas J. Maas, President, Director, Secretary & Treasurer on every filing since 2019; none of the 3 officers listed in 2025 report compensation.
Officers on the 2025 filing
Thomas J. Maas
President, Director, Secretary & Treasurer
On filings since 2019
0.2 hrs/week
No compensation reported
Duane A. Maas
Director
On filings since 2019
0.2 hrs/week
No compensation reported
Jon K. Maas
Director
On filings since 2019
0.2 hrs/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 Maas Foundation Inc
How much does Maas Foundation Inc give each year?
Maas Foundation Inc gave $136K across 38 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $100K across 27 grants.
What is Maas Foundation Inc's typical grant size?
Maas Foundation Inc's median grant in 2025 was $2,750, and its average grant was $3,567, across 38 grants on its 2025 IRS Form 990-PF.
Where does Maas Foundation Inc give grants?
Maas Foundation Inc's top state is Wisconsin, with 28% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were California (18%) and Florida (15%). The most frequent recipient cities were Chicago, IL (7 grants), Fort Myers, FL (3 grants), Madison, WI (3 grants) and Milwaukee, WI (2 grants).
Who are Maas Foundation Inc's largest grantees?
Maas Foundation Inc's largest 2025 grantees include University of Wisconsin Foundation ($20,250), Los Angeles Philharmonic Association ($10,000) and Lee Memorial Health System Foundation Inc ($6,000), according to its 2025 IRS Form 990-PF. It also paid 2 grants to individuals ($6,500), which are not listed by name. Together they received 27% of its itemized 2025 grant dollars.
How large is Maas Foundation Inc?
Maas Foundation Inc reported $1.4M in total assets on its 2025 IRS Form 990-PF. It paid out $137K in qualifying distributions that year, against a required minimum of $70K (roughly 5% of its investment assets).
What does Maas Foundation Inc fund?
No foundation mission statement is provided. Its grants show support for organizations working in areas including education, arts and culture, health, social services, children’s programs, and the environment. See mission & focus areas ↑
How do I apply for a grant from Maas Foundation Inc?
The foundation makes contributions only to preselected charitable organizations and does not accept unsolicited requests. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is Maas Foundation Inc's EIN?
Maas Foundation Inc's EIN (Employer Identification Number) is 46-1632345. IRS Form 990 filing data is available on this page for 2019–2025.
Does Maas Foundation Inc accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated September 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2019 (received by the IRS June 10, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 6, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS November 15, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 15, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 14, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS April 25, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS March 9, 2026)
- IRS filings on file for fiscal years 2019–2025
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Cite this profile
Grantable. (2026). Maas Foundation Inc funder profile. GrantGraph. Retrieved October 11, 2026, from https://grantable.co/funders/maas-foundation-inc-morg_87eb2cc6b3c44e20a51d84ad5a8adbe1
BibTeX
@misc{grantable_461632345_2026,
author = {{Grantable}},
title = {{Maas Foundation Inc funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/maas-foundation-inc-morg_87eb2cc6b3c44e20a51d84ad5a8adbe1},
note = {Accessed 2026-10-11. 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 Maas Foundation Inc'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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