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Governance Register
US nonprofit · EIN 391049525 · Madison, WIiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 391049525) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 31 August 2025: assets, liabilities, staff, website, telephone, pay.Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Madison Montessori Society Inc's network

11 people2 organisationsi11 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (11). Violet dotted lines (2) 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

11 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.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 11 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Abby LindemannDirector2023
3 yrs
Alison EngStaff Rep2020
6 yrs
Diane WengDirector2025
1 yr
Erin RileyDirector2025
1 yr
Jacinda KoppDirector2018
8 yrs
Jennifer SchollerDirector2022
4 yrs
Kevin NoelVice President2018
8 yrs
Ladonna SteinertTreasurer2023
3 yrs
Margaret PorcoPresident2018
8 yrs
Stephan SchmidCompany secretary2023
3 yrs
Tessa BegayDirector2023
3 yrs
Under 5 years5 to 6 years6 years or moreShow all 11 →

Pay and hours

year to 31 August 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.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Jacinda KoppDirector0$0
LaDonna SteinertTreasurer0$0
Kevin NoelVice President0$0
Tessa BegayDirector0$0
Margaret PorcoPresident0$0
Stephan SchmidSecretary0$0
Jennifer SchollerDirector0$0
Erin RileyDirector0$0
Diane WengDirector0$0
Alison EngStaff Rep0$0
Abby LindemannDirector0$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Madison Montessori Society Inc
EIN
391049525
Address
5530 Medical Cir, Madison, WI, 53719-1202
State
Wisconsin
Mission
Education and Child Care (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
4 (IRS master file code)
Formed
1964
Principal officer
LaDonna Steinert (as named on the Form 990)
IRS ruling date
1 March 1966
Status
Code 01 (unconditional exemption)
Form 990 filings on record
8, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsJacinda Kopp
≥8years on the filingsKevin Noel
≥8years on the filingsMargaret Porco
≥6years on the filingsAlison Eng

Latest return

year to 31 August 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 August 2025. US dollars, as filed.
Total assets
$454k
Total liabilities
$10k
Net assets or fund balances
$443k
Contributions and grants received
$55k
Program service revenue
$560k
Employees
0

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2023$558k$556k$2k

As filed on the IRS Form 990. US dollars.