Skip to content
ProPublica Donate
ProPublica Donate

Maas Foundation Inc

  • Pewaukee, WI
  • Tax-exempt since Jan. 2014
  • EIN: 46-1632345

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Category: Philanthropy, Voluntarism and Grantmaking Foundations / Private Independent Foundations (NTEE)

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$68.2k (2024)

Expenses
$111k (2024)

Total Assets
$1.48M (2024)

Total Liabilities
$0 (2024)

Years with multiple filings
Source: Form 990 tax filings from 2013 to 2024

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$68,233
Expenses
$110,503
Net Income
-$42,270
Net Assets
$1,480,810
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $6,467
9.5%
Interest Revenue $0
Dividends $27,902
40.9%
Sales of Assets $33,864
49.6%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $100,300
90.8%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,480,810
Total Liabilities $0
Net Assets $1,480,810
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on April 25, 2025

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$51,352
Expenses
$89,971
Net Income
-$38,619
Net Assets
$1,522,342
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $9,169
17.9%
Interest Revenue $0
Dividends $27,746
54.0%
Sales of Assets $14,207
27.7%
Other Income $230
0.4%
Notable Expenses Percent of Total Expenses
Charitable Disbursements $82,000
91.1%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,522,342
Total Liabilities $0
Net Assets $1,522,342
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on May 14, 2024

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$32,384
Expenses
$92,149
Net Income
-$59,765
Net Assets
$1,565,813
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $43,160
> 100%
Sales of Assets -$10,776
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $90,500
98.2%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,567,784
Total Liabilities $1,971
Net Assets $1,565,813
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on May 15, 2023

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$1,698,016
Expenses
$80,692
Net Income
$1,617,324
Net Assets
$1,625,578
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $1,634,068
96.2%
Interest Revenue $0
Dividends $11,436
0.7%
Sales of Assets $52,512
3.1%
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $70,700
87.6%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $1,625,578
Total Liabilities $0
Net Assets $1,625,578
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Nov. 15, 2022

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$85,000
Expenses
$124,491
Net Income
-$39,491
Net Assets
$8,253
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $85,000
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $123,101
98.9%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $8,254
Total Liabilities $1
Net Assets $8,253
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on May 6, 2021

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$1
Expenses
$44,372
Net Income
-$44,371
Net Assets
$47,744
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $42,750
96.3%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $47,745
Total Liabilities $1
Net Assets $47,744
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on June 10, 2020

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$73,159
Expenses
$6,776
Net Income
$66,383
Net Assets
$92,117
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $73,159
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,500
51.7%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $92,117
Total Liabilities $0
Net Assets $92,117
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on March 20, 2019

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$200
Expenses
$5,191
Net Income
-$4,991
Net Assets
$25,734
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $200
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $3,500
67.4%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $25,734
Total Liabilities $0
Net Assets $25,734
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President/Director) $0 $0
Duane A Maas (Director) $0 $0
Thomas J Maas (Sec/Treas) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on Sept. 7, 2018

Primary tax return for a private foundation's activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$0
Expenses
$8,280
Net Income
-$8,280
Net Assets
$30,613
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $0
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $6,000
72.5%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $30,725
Total Liabilities $112
Net Assets $30,613
Compensation
Key Employees and Officers Compensation Other
Thomas E Maas (President) $0 $0
Thomas J Maas (Secretary/Treasurer) $0 $0
Duane A Maas (Director) $0 $0
Thomas E Maas (Director) $0 $0
Jon K Maas (Director) $0 $0
+ View more people

Document Links

990-PF
Filed on June 8, 2017

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$100,000
Expenses
$78,348
Net Income
$21,652
Net Assets
$38,893
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $100,000
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $75,000
95.7%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $38,893
Total Liabilities $0
Net Assets $38,893
Compensation
Key Employees and Officers Compensation Other
Duane H Maas (President) $0 $0
Thomas E Maas (Treasurer) $0 $0
Thomas E Maas (Secretary) $0 $0

Document Links

990-PF
Filed on May 16, 2016

Primary tax return for a private foundation's activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF
Revenue
$25,000
Expenses
$10,825
Net Income
$14,175
Net Assets
$17,241
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $25,000
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $10,000
92.4%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $17,241
Total Liabilities $0
Net Assets $17,241

Document Links

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$5,000
Expenses
$6,934
Net Income
-$1,934
Net Assets
$3,065
Notable Sources of Revenue Percent of Total Revenue
Contributions $5,000
100%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $3,065
Total Liabilities $0
Net Assets $3,065
Extracted Financial Data from Form 990-PF
Revenue
$5,000
Expenses
$6,934
Net Income
-$1,934
Net Assets
$3,066
Notable Sources of Revenue Percent of Total Revenue
Contributions Received $5,000
100%
Interest Revenue $0
Dividends $0
Sales of Assets $0
Other Income $0
Notable Expenses Percent of Total Expenses
Charitable Disbursements $1,500
21.6%
Compensation of Officers* $0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.
Assets/Debt
Total Assets $3,066
Total Liabilities $0
Net Assets $3,066

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF
990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2012

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

API

The data powering this website is available programmatically, via an API. Read the API documentation »

See an issue with the data?

Contact Us

About Nonprofit Explorer

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

Updated