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INTERNATIONAL EOSINOPHIL SOCIETY INC

EIN 27-2696878 MILWAUKEE, WI

Revenue 2024
$166,844
Expenses 2024
$136,983

Program services were 60.3% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
G43
Classification
1200
Street
555 E WELLS ST STE 1100

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

40 other organizations in the IRS Business Master File list the same street address. matched by us

This address is a suite or unit (STE 1100). Organizations that share one are often clients of the same office-services firm, accountant or registered agent rather than related to each other.

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2024

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.

  • 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

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Florence Roufosee MD PhD

    PAST PRESIDENT

    Total calculated
    $0
    Hours/week
    2

  • Marc Rothenberg MD PhD

    PRESIDENT

    Total calculated
    $0
    Hours/week
    2

  • Allison D Fryer PhD

    PRESIDENT-ELECT

    Total calculated
    $0
    Hours/week
    2

  • Jean-Emmanuel Kahn MD PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Amy D Klion MD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Rossana C N Melo PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Lisa A Spencer PhD

    SECRETARY-TREASURER

    Total calculated
    $0
    Hours/week
    2

  • Michael E Wechsler MD Mmsc

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Eva Knuplez PhD

    TRAINEE BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • Matthew Drake PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Elizabeth Jacobsen PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Fei Li Kuang PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Manali Mukherjee PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Yoshiyki Yamada PhD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Nives Zimmermann MD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • Nicola Diny PhD

    TRAINEE BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $166,844
    Expenses
    $136,983
    Contributions
    $131,127
    Grants paid
    $0
  • 2023
    Revenue
    $534,777
    Expenses
    $293,423
    Contributions
    $398,108
    Grants paid
    $26,709
  • 2022
    Revenue
    $167,851
    Expenses
    $45,899
    Contributions
    $155,000
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $119,320
    Expenses
    $38,029
    Assets (EOY)
    $327,463

  • 2020 · 990

    Revenue
    $87,846
    Expenses
    $38,766
    Assets (EOY)
    $242,399

  • 2019 · 990

    Revenue
    $289,172
    Expenses
    $219,019
    Assets (EOY)
    $195,764

  • 2018 · 990-EZ

    Revenue
    $44,662
    Expenses
    $36,920
    Assets (EOY)
    $127,912

  • 2017 · 990-EZ

    Revenue
    $156,921
    Expenses
    $182,760
    Assets (EOY)
    $118,630

  • 2016 · 990-EZ

    Revenue
    $41,634
    Expenses
    $34,595
    Assets (EOY)
    $141,638

  • 2015 · 990

    Revenue
    $255,293
    Expenses
    $196,310
    Assets (EOY)
    $148,081

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.