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US nonprofit · EIN 391659050 · Green Bay, WIiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 391659050) - 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 May 2026: 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

The Green Bay and Depere Antiquarian Society Inc

Donations deductible
Revenue
$66k
year to 31 May 2026
Expenses
$48k
year to 31 May 2026
Total assets
$1.6m
$24k liabilities
Net assets
$1.6m
assets less liabilities
Directors and trustees
12
3.3y av
Staff
0
employees, year to 31 May 2026
Left since last filing
2
17% of the board
Officers and senior staff
6
named in Part VII
How am I connected?

The Green Bay and Depere Antiquarian Society Inc's network

12 people4 organisationsi12 people and 4 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). Violet dotted lines (4) 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

12 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 13 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Audrey RopsonBoard Member2021
5 yrs
Barbara MillerBoard Member2025
1 yr
Joan BondBoard Member2024
2 yrs
Kim Vandenavond (also filed as Kim Vandenavond)Board Member2021
5 yrs
Maria ZehrenBoard Member2024
2 yrs
Michael TroyerBoard Member2024
2 yrs
Nannette HoppeBoard Member2022
4 yrs
Patti HitzlerBoard Member2025
1 yr
Patty BrennanScribe2025
1 yr
Sandy JacksonBoard Member2021
5 yrs
Sherry SteffelBoard Member2021
5 yrs
Trisha LinssenBoard Member2025
1 yr
Under 5 years5 to 6 years6 years or moreShow all 12 →

Officers and senior leadership

6 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Annette AubingerScribe2021
Kim VandenavondGovernor2022
Michelle SimonsonTithesmansince 2021
Nannette HoppeGovernor2021
Nancy WattsScribe2022
Susan FrostVice-Governorsince 2021

Pay and hours

year to 31 May 2026iFrom 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
Joan BondBoard Member$0
Cindy BrawnerBoard Member$0
Mary Jane HerberGovernor10$0
Patti HitzlerBoard Member$0
Nannette HoppeBoard Member$0
Sandy JacksonBoard Member$0
Cami JensonVice Governo10$0
Trisha LinssenBoard Member$0
Audrey RopsonBoard Member$0
Roberta Gale ScribeVice Governo5$0
Sherry SteffelBoard Member$0
Michelle Simonson TithesmanTreasurer15$0
Michael TroyerBoard Member$0
Kim VandenavondBoard Member$0
Maria ZehrenBoard Member$0

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

About

Legal name
The Green Bay and Depere Antiquarian Society Inc
EIN
391659050
Address
Po Box 875, Green Bay, WI, 54305-0875
State
Wisconsin
Mission
The aim and purpose of this organization is to hold, purchase, preserve and acquire antiquities and real estate to perpetuate the history of the locality surrounding green bay and the state of wisconsin. (as filed on the Form 990)
Activity (NTEE)
A128 Arts, culture and humanities
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Arts, Culture & Humanities
Size band
6 (IRS master file code)
Formed
1923
Principal officer
Michelle Simonson Tithesman (as named on the Form 990)
IRS ruling date
1 December 2006
Status
Code 01 (unconditional exemption)
Form 990 filings on record
5, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥5years on the filingsAudrey Ropson
≥5years on the filingsKim Vandenavond
≥5years on the filingsSandy Jackson
≥5years on the filingsSherry Steffel

Latest return

year to 31 May 2026iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 May 2026. US dollars, as filed.
Total assets
$1.6m
Total liabilities
$24k
Net assets or fund balances
$1.6m
Contributions and grants received
$48k
Program service revenue
$0
Employees
0

Filed finances

2 yearsiTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$60k$38k$22k
2024$60k$38k$22k

As filed on the IRS Form 990. US dollars.