Wisconsin Montessori Society Inc
Donations deductibleWisconsin Montessori Society Inc's network
4 people3 organisationsi4 people and 3 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (4). Violet dotted lines (3) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.The board
4 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 7 voting members of its governing body on its latest Form 990 Part VI; we list 4 in Part VII (Part VII does not always name every voting member).| Name | Role as filed | Since | On the board |
|---|---|---|---|
| Christian Walters | Trustee | 2019 | 7 yrs |
| Julie Ledger | Trustee | 2019 | 7 yrs |
| Mona Shah | Trustee | 2023 | 3 yrs |
| Will Loder | Trustee | 2020 | 6 yrs |
Under 5 years5 to 6 years6 years or more
Officers and senior leadership
4 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.| Name | Title as filed | On the filings |
|---|---|---|
| Katherine Lewis | President | since 2019 |
| Kathleen O'Brien | Vice President | since 2019 |
| Monica Van Aken | Head of School | since 2019 |
| Rob Dejong | Treasurer | since 2019 |
Pay and hours
year to 30 June 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.| Name | Title as filed | Hours a week | Pay from the organisation | Related organisations | Other |
|---|---|---|---|---|---|
| Monica van Aken 7124 - 63025 | Head of School | 50 | $228k | $11k | |
| Debbie Mather | Business Manager | 47 | $123k | $12k | |
| David Swanson 5125 - 63025 | Head of School | 50 | $81k | $11k | |
| Julie Ledger | Trustee | 0.25 | $0 | ||
| Will Loder | Trustee | 0.25 | $0 | ||
| Mona Shah | Trustee | 0.25 | $0 | ||
| Kathleen O'brien | Vice President | 0.25 | $0 | ||
| Rob Dejong | Treasurer | 0.25 | $0 | ||
| Katherine Lewis | President | 0.25 | $0 | ||
| Christian Walters | Secretary | 0.25 | $0 |
About
- Legal name
- Wisconsin Montessori Society Inc
- EIN
- 391016541
- Address
- 345 N 95th St, Milwaukee, WI, 53226-4441
- State
- Wisconsin
- Mission
- 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... (as filed on the Form 990)
- Activity (NTEE)
- B21Z Education
- IRS classification
- 501(c)03 (tax-exempt under section 501(c)(3) where shown)
- Classified purpose
- Education
- Size band
- 8 (IRS master file code)
- Formed
- 1961
- Principal officer
- Katherine Lewis (as named on the Form 990)
- IRS ruling date
- 1 January 1964
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 5, latest 2024
- IRS Publication 78
- PC (contributions deductible)
Most connected
Longest observed on the filings
≥7years on the filingsChristian Walters
≥7years on the filingsJulie Ledger
≥6years on the filingsWill Loder
≥3years on the filingsMona Shah
Latest return
year to 30 June 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 June 2025. US dollars, as filed.- Total assets
- $15.2m
- Total liabilities
- $2.8m
- Net assets or fund balances
- $12.3m
- Contributions and grants received
- $303k
- Program service revenue
- $7.1m
- Employees
- 119
- Volunteers
- 25