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Nonprofit · EIN 27-2696878

INTERNATIONAL EOSINOPHIL SOCIETY INC

Tax-exempt · MILWAUKEE, WI 53202

Financials

$535K$293K2023$167K$137K2024
Revenue Expenses · by fiscal year end
Financials of INTERNATIONAL EOSINOPHIL SOCIETY INC by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
December 31, 2024990$166,844$136,983$29,861$726,395$16,193$710,202
December 31, 2023990$534,777$293,423$241,354$691,177$10,836$680,341
Financial details: 990 for the year ended December 31, 2024

Revenue

Contributions, gifts and grants
$131,127
Program service revenue
$11,812
Investment income
$23,905
Other revenue
$0

Expenses

Grants and similar amounts paid
$0
Salaries, compensation and benefits (total)
$0
Professional fundraising fees
$0
Accounting fees
$7,500
Travel
$8,376
Program services (functional)
$82,658
Management and general (functional)
$49,968
Fundraising (functional)
$4,357

Balance sheet and other

Total assets, start of year
$691,177
Total assets, end of year
$726,395
Total liabilities, end of year
$16,193
Net assets, end of year
$710,202
Net assets without donor restrictions
$680,340
Net assets with donor restrictions
$29,862
Gross receipts
$166,844
Employees
0
Volunteers
15
Year formed
2010
State of legal domicile
WI

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended December 31, 2024, highest compensation first.

NameTitleHours / weekCompensation
FLORENCE ROUFOSEE MD PHDPAST PRESIDENT
Trustee or director, Officer
2$0
MARC ROTHENBERG MD PHDPRESIDENT
Trustee or director, Officer
2$0
ALLISON D FRYER PHDPRESIDENT-ELECT
Trustee or director, Officer
2$0
JEAN-EMMANUEL KAHN MD PHDDIRECTOR
Trustee or director
1$0
AMY D KLION MDDIRECTOR
Trustee or director
1$0
ROSSANA C N MELO PHDDIRECTOR
Trustee or director
1$0
LISA A SPENCER PHDSECRETARY-TREASURER
Trustee or director, Officer
2$0
MICHAEL E WECHSLER MD MMSCDIRECTOR
Trustee or director
1$0
EVA KNUPLEZ PHDTRAINEE BOARD MEMBER
Trustee or director
1$0
MATTHEW DRAKE PHDDIRECTOR
Trustee or director
1$0
ELIZABETH JACOBSEN PHDDIRECTOR
Trustee or director
1$0
FEI LI KUANG PHDDIRECTOR
Trustee or director
1$0
MANALI MUKHERJEE PHDDIRECTOR
Trustee or director
1$0
YOSHIYKI YAMADA PHDDIRECTOR
Trustee or director
1$0
NIVES ZIMMERMANN MDDIRECTOR
Trustee or director
1$0
1 more people on this return
NameTitleHours / weekCompensation
NICOLA DINY PHDTRAINEE BOARD MEMBER
Trustee or director
1$0
990 for the year ended December 31, 2023: 22 people
NameTitleHours / weekCompensation
FLORENCE ROUFOSEE MD PHDPAST PRESIDENT
Trustee or director, Officer
2$0
MARC ROTHENBERG MD PHDPRESIDENT
Trustee or director, Officer
2$0
DAGMAR SIMON MDPAST SECRETARY-TREASURER
Trustee or director, Officer
2$0
BRUCE BOCHNER MDPAST PRESIDENT
Trustee or director, Officer
2$0
ALLISON D FRYER PHDPRESIDENT-ELECT
Trustee or director, Officer
2$0
PRAVEEN AKUTHOTA MDDIRECTOR
Trustee or director
1$0
JEAN-EMMANUEL KAHN MD PHDDIRECTOR
Trustee or director
1$0
PANEEZ KHOURY MDDIRECTOR
Trustee or director
1$0
AMY D KLION MDDIRECTOR
Trustee or director
1$0
ROSSANA C N MELO PHDDIRECTOR
Trustee or director
1$0
ARIEL MUNITZDIRECTOR
Trustee or director
1$0
LISA A SPENCER PHDSECRETARY-TREASURER
Trustee or director, Officer
2$0
SHIGEHARU UEKI MD PHDDIRECTOR
Trustee or director
1$0
MICHAEL E WECHSLER MD MMSCDIRECTOR
Trustee or director
1$0
EVA KNUPLEZ PHDTRAINEE BOARD MEMBER
Trustee or director
1$0
KIHO SUN PHDTRAINEE BOARD MEMBER
Trustee or director
1$0
MATTHEW DRAKE PHDDIRECTOR
Trustee or director
1$0
ELIZABETH JACOBSON PHDDIRECTOR
Trustee or director
1$0
FEI LI KUANG PHDDIRECTOR
Trustee or director
1$0
MANALI MUKHERJEE PHDDIRECTOR
Trustee or director
1$0
YOSHIYKI YAMADA PHDDIRECTOR
Trustee or director
1$0
NIVES ZIMMERMANN MDDIRECTOR
Trustee or director
1$0

Address and contacts

Address (IRS master file)
555 E WELLS ST STE 1100, MILWAUKEE, WI 53202-3800
In care of
% KAY WHALEN
Principal officer (990 for 2024)
ALLISON FRYER PHD, 555 E WELLS STREET 1100, MILWAUKEE, WI 53202
Signed the 990
NIVES ZIMMERMANN MD, SECRETARY-TREASURER
Phone
(414) 276-6445
Return prepared by
RITZ HOLMAN LLP

Mission

THE INTERNATIONAL EOSINOPHIL SOCIETY (IES) ADVANCES THE UNDERSTANDING OF EOSINOPHILS AND EOSINOPHIL-ASSOCIATED DISEASES. WE ARE A GLOBAL COMMUNITY OF SCIENTISTS AND CLINICIANS WHO DEVELOP AND SHARE OUR KNOWLEDGE OF EOSINOPHIL BIOLOGY AND INNOVATIVE RESEARCH APPROACHES. THROUGH BIENNIAL MEETINGS AND WEBINARS, THE SOCIETY BRINGS TOGETHER INDIVIDUALS INTERESTED IN EOSINOPHILS, FOSTERING A VIBRANT COMMUNITY THAT SPANS ALL CAREER STAGES. TOGETHER, WE DRIVE BASIC, TRANSLATIONAL, AND CLINICAL RESEARCH THAT ADVANCES DIAGNOSIS, TREATMENT, AND MANAGEMENT OF EOSINOPHILIC DISEASES.

990 for the year ended December 31, 2024

Program accomplishments

  • THE INTERNATIONAL EOSINOPHIL SOCIETY (IES) IS A GLOBAL COMMUNITY OF SCIENTISTS AND CLINICIANS UNITED IN ADVANCING UNDERSTANDING AND TREATMENT OF EOSINOPHIL-RELATED DISEASES, LEADING TO IMPROVED PATIENT OUTCOMES AND ENHANCED QUALITY OF LIFE.
    Expenses $82,658 · revenue $11,812

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025December 31, 2025May 15, 2026Not on file
2024December 31, 2024May 15, 2025990 on file
2023December 31, 2023May 15, 2024990 on file

IRS record

EIN
27-2696878
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
2011
Accounting year ends
December
Files
Form 990 or 990-EZ
Assets (IRS master file)
$726,395
Income (IRS master file)
$166,844

Filing history

FormYear endedRevenueExpensesAssetsReturn
990December 2024$166,844$136,983$726,395XML
990December 2023$534,777$293,423$691,177XML
990December 2022$167,851$45,899$504,100IRS
990December 2021–––IRS
990December 2020–––IRS
990-EZDecember 2018–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 27-2696878).

Questions about INTERNATIONAL EOSINOPHIL SOCIETY INC

What is the EIN of INTERNATIONAL EOSINOPHIL SOCIETY INC?
The employer identification number (EIN) of INTERNATIONAL EOSINOPHIL SOCIETY INC is 27-2696878.
Is INTERNATIONAL EOSINOPHIL SOCIETY INC tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2011.
Are donations to INTERNATIONAL EOSINOPHIL SOCIETY INC tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does INTERNATIONAL EOSINOPHIL SOCIETY INC file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of INTERNATIONAL EOSINOPHIL SOCIETY INC due?
The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did INTERNATIONAL EOSINOPHIL SOCIETY INC last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended December 2024.
Who is the principal officer of INTERNATIONAL EOSINOPHIL SOCIETY INC?
The 990 for the year ended December 31, 2024 names ALLISON FRYER PHD.
Who are the officers and directors of INTERNATIONAL EOSINOPHIL SOCIETY INC?
The 990 for the year ended December 31, 2024 lists 16 people; 0 received compensation from the organization.
How much revenue does INTERNATIONAL EOSINOPHIL SOCIETY INC have?
On its 990 for the year ended December 31, 2024 it reported revenue of $166,844, expenses of $136,983 and total assets of $726,395 at year end.

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