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Governance Register
US nonprofit · EIN 391526850 · Kimberly, WIiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 391526850) - 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 - 990EZ for the year to 31 December 2024: 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

Wisconsin Orthopaedic Society's network

3 peoplei3 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

3 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.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.
NameRole as filedSinceOn the board
Brian Nickel MDPresident2024
2 yrs
Connor Sullivan MDPresident Elect2023
3 yrs
Jacob Seiler MDSecretary/Treasurer2024
2 yrs
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

1 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Eric OstermannExecutive Director2024

Pay and hours

year to 31 December 2024iFrom 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
Eric OstermannExecutive Director1$0
Brian Nickel MDPresident2$0
Connor Sullivan MDPresident Elect1$0
Jonathan Campbell MDImmediate Past President2$0
Jacob Seiler MDSecretary/Treasurer2$0
Steven Grindel MDMember at Large1$0
James Bernatz MDMember at Large1$0
Gerald Lang MDMember at Large1$0

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

About

Legal name
Wisconsin Orthopaedic Society
EIN
391526850
Address
563 Carter Court Ste B, Kimberly, WI, 54136-2201
State
Wisconsin
Activity (NTEE)
G50 Voluntary health associations and medical disciplines
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Voluntary Health Associations & Medical Disciplines
Size band
4 (IRS master file code)
IRS ruling date
1 June 2003
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥3years on the filingsConnor Sullivan MD
≥2years on the filingsBrian Nickel MD
≥2years on the filingsJacob Seiler MD

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$207k
Total liabilities
$10k
Net assets or fund balances
$196k

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$63k$52k$12k

As filed on the IRS Form 990. US dollars.