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US nonprofit · EIN 237136019 · Chicago, ILiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 237136019)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 30 June 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 SOUNK), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Chicago Tumor Institute

Donations deductible
Total assets
$0
$0 liabilities
Net assets
$0
assets less liabilities
Directors and trustees
3
4.3y av
Left since last filing
0
no seats appear to have opened
Filings on record
3
latest 2024
Renewal outlook
Low current likelihood
score 0 of 100
How am I connected?

Chicago Tumor Institute'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
John KrollTreasurer2022
4 yrs
Kim TaylorCompany secretary2022
4 yrs
Ralph WeichselbaumPresident2022
4 yrs
Under 5 years5 to 6 years6 years or more

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.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Kimberly TaylorSecretary (UNTIL 8/2/2024)1$0
John KrollTreasurer (UNTIL 8/2/24)0$0
Ralph WEICHSELBAUMPresident & Director1$0
Elizabeth ShaninSecretary & Director (Eff. 8/2/24)1$0
Ivan SamsteinTreasurer & Director (Eff. 8/2/24)1$0

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

About

Legal name
Chicago Tumor Institute
EIN
237136019
Address
5801 S Ellis Avenue, Chicago, IL, 60637-5418
State
Illinois
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Size band
1 (IRS master file code)
IRS ruling date
1 January 1938
Status
Code 01 (unconditional exemption)
Form 990 filings on record
3, latest 2024
IRS Publication 78
SOUNK (contributions deductible)

Most connected

Longest observed on the filings

≥4years on the filingsJohn Kroll
≥4years on the filingsKim Taylor
≥4years on the filingsRalph Weichselbaum

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
$0
Total liabilities
$0
Net assets or fund balances
$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$0$0$0

As filed on the IRS Form 990. US dollars.