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Compensation 990 is an independent service that uses public IRS Form 990 filings as its source data. We clean and standardize this information, but the original filings may contain errors or omissions. Years on this site refer to the organization’s fiscal year end date on the filing.

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Organizations Education Wisconsin Montessori Society Inc.

Wisconsin Montessori Society Inc.

Fiscal year ending 2025. Filed on November 7, 2025.

345 North 95th Street
Milwaukee, Wisconsin 53226

Wisconsin Montessori Society Inc. (EIN: 39-1016541) has filed an IRS Form 990 since fiscal year 2017. In its fiscal year 2025 IRS Form 990 filing, Wisconsin Montessori Society Inc., a 501(c)(3) charitable organization, reported compensation for 7 out of 119 total employees. Among the employees shown here, the average compensation is $155,262. The highest compensated employee at Wisconsin Montessori Society Inc. is Monica van Aken 7124 - 63025 with fiscal year 2025 compensation of $239,091.

Revenue, expenses, and employee compensation

Revenue

$7,519,817

Expenses

$7,294,500

Employee compensation

$5,153,335
Revenue, expenses, and employee compensation over time

Reported Compensated Employees

Monica van Aken 7124 - 63025
Head of School
$239,091
$228,063 No related comp$11,028
Debbie Mather
Business Manager
$134,952
$122,800 No related comp$12,152
David Swanson 5125 - 63025
Head of School
$91,742
$80,656 No related comp$11,086
Rob Dejong
Treasurer
$0
Christian Walters
Secretary
$0
Kathleen O'Brien
Vice President
$0
Katherine Lewis
President
$0

Benchmark Employee Compensation

Non-Employee Board Members

Julie Ledger
Trustee
Mona Shah
Trustee
Will Loder
Trustee

Contractors

Leffler Commercial & Industiral Cleaning
Cleaning
$175,472

Mission Statement

MISSION: EDUCATING YOUNGSTERS TO BECOME AN INFORMED, COMMITTED, AND DIFFERENCE-MAKING GENERATION. VISION: EDUCATING CHILDREN TO GRADUATE AS INFORMED, ENGAGED, ETHICALLY MINDED CITIZENS OF THE WORLD THAT THEY INHERIT. PURPOSE: MILWAUKEE MONTESSORI SCHOOL IS A PRIVATE INDEPENDENT DAY SCHOOL DEDICATED TO EXPANDING THE HUMAN POTENTIAL OF ALL CHILDREN FOR THE PURPOSE OF EDUCATING THEM FOR A FREER, SAFER, WORLD. THE WORK OF OUR FACULTY AND STAFF ADVANCES OUR IDEAS ROOTED IN OUR BELIEF IN DEMOCRACY, PERSONAL FREEDOM, SOLIDARITY WITH THOSE AT THE PERIPHERY OF SOCIETY, THE WELL-BEING OF OUR PLANET, AND EDUCATING CHILDREN TO BECOME INFORMED, ENGAGED, ETHICALLY MINDED CITIZENS FOR THE WORLD THAT THEY WILL INHERIT.

Revisions to this organization profile

November 7, 2025:
2025 Wisconsin Montessori Society Inc. 990 filed
November 15, 2024:
2024 Wisconsin Montessori Society Inc. 990 filed
November 14, 2023:
2023 Wisconsin Montessori Society Inc. 990 filed

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