Nonprofit · EIN 45-1350485
INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS
Also known as IUSSI
Tax-exempt · COLUMBUS, OH 43210
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $63,771 | $128,676 | -$64,905 | $46,883 | – | $46,883 |
| December 31, 2024 | 990-EZ | $50,062 | $16,571 | $33,491 | $111,788 | – | $111,788 |
| December 31, 2023 | 990-EZ | $29,884 | $1,555 | $28,329 | $78,297 | – | $78,297 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Program service revenue
- $63,758
- Investment income
- $13
Expenses
- Grants and similar amounts paid
- $109,998
- Compensation of officers, directors and key employees
- $0
- Professional fees and payments to contractors
- $300
- Other expenses
- $18,378
- Program services (functional)
- $128,046
Balance sheet and other
- Total assets, start of year
- $111,788
- Total assets, end of year
- $46,883
- Total liabilities, end of year
- –
- Net assets, end of year
- $46,883
- Cash, savings and investments
- $46,883
- Gross receipts
- $63,771
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-EZ for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JUDITH KORB | PRESIDENT | 2 | $0 |
| MARK BROWN | SECRETARY-GENERAL | 2 | $0 |
| MADELEINE BEEKMAN | EDITOR IN CHIEF | 20 | $0 |
| CHRISTOPHER STARR | ARCHIVIST | 1 | $0 |
| DAVID NASH | WEBMASTER | 1 | $0 |
990-EZ for the year ended December 31, 2024: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JUDITH KORB | PRESIDENT | 2 | $0 |
| MARK BROWN | SECRETARY-GENERAL | 2 | $0 |
| MADELEINE BEEKMAN | EDITOR IN CHIEF | 20 | $0 |
| CHRISTOPHER STARR | ARCHIVIST | 1 | $0 |
| DAVID NASH | WEBMASTER | 1 | $0 |
990-EZ for the year ended December 31, 2023: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JUDITH KORB | PRESIDENT | 2 | $0 |
| MARK BROWN | SECRETARY-GENERAL | 2 | $0 |
| MADELEINE BEEKMAN | EDITOR IN CHIEF | 20 | $0 |
| CHRISTOPHER STARR | ARCHIVIST | 1 | $0 |
| DAVID NASH | WEBMASTER | 1 | $0 |
Address and contacts
- Address (IRS master file)
- C/O OHIO STATE UNIV 318 W 12TH AVE, COLUMBUS, OH 43210-0000
- In care of
- % MARK JF BROWN
- Signed the 990-EZ
- MARK JF BROWN, SECRETARYGENERAL
- Phone
- (614) 292-5472
- Website
- IUSSI.ORG
- Return prepared by
- Concept Business Solutions Inc
Mission
SEE SCHEDULE O
Program accomplishments
- THE IUSSI PUBLISHES A SCIENTIFIC JOURNAL, INSECTES SOCIAUX, FOCUSING PRIMARILY ON RESEARCH ARTICLES. THE IUSSI ALSO COMMISSIONS A FEW REVIEW ARTICLES EVERY YEAR, WHICH INCLUDE A SMALL HONORARIA TO THE STUDENT AUTHORS.Expenses $18,048
- TRAVEL GRANTS AWARDED BY AN EQUITABLE INTERNAL PROCESS, TO US AND NON-US SECTIONS OF THE IUSSI, TO SUPPORT THE ATTENDANCE OF STUDENTS AND UNDER-PRIVILEGED MEMBERS AT THE INTERNATIONAL CONGRESS IN AUGUST 2026Expenses $109,998 · grants $109,998
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 year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 45-1350485
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2012
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C05)
- Assets (IRS master file)
- $46,883
- Income (IRS master file)
- $63,771
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | $63,771 | $128,676 | $46,883 | IRS |
| 990-EZ | December 2024 | $50,062 | $16,571 | $111,788 | IRS |
| 990-EZ | December 2023 | $29,884 | $1,555 | $78,297 | XML |
| 990-EZ | December 2022 | – | – | – | IRS |
| 990-EZ | December 2021 | – | – | – | IRS |
| 990-EZ | December 2020 | – | – | – | IRS |
| 990-EZ | December 2019 | – | – | – | IRS |
| 990-EZ | December 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 45-1350485).
Questions about INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS
- What is the EIN of INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS?
- The employer identification number (EIN) of INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS is 45-1350485.
- Is INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2012.
- Are donations to INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS 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 UNION FOR THE STUDY OF SOCIAL INSECTS due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who are the officers and directors of INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS?
- The 990-EZ for the year ended December 31, 2025 lists 5 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL UNION FOR THE STUDY OF SOCIAL INSECTS have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $63,771, expenses of $128,676 and total assets of $46,883 at year end.
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