Nonprofit · EIN 13-6203476
SOCIETY OF RHEOLOGY INCORPORATED
Tax-exempt · COLLEGE PARK, MD 20740
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2024 | 990 | $776,163 | $705,600 | $70,563 | $2,659,231 | $168,266 | $2,490,965 |
| December 31, 2023 | 990 | $317,080 | $217,752 | $99,328 | $2,593,852 | $173,448 | $2,420,404 |
Financial details: 990 for the year ended December 31, 2024
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $634,335
- Investment income
- $141,828
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $26,877
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Legal fees
- $677
- Accounting fees
- $5,143
- Program services (functional)
- $110,788
- Management and general (functional)
- $594,812
Balance sheet and other
- Total assets, start of year
- $2,593,852
- Total assets, end of year
- $2,659,231
- Total liabilities, end of year
- $168,266
- Net assets, end of year
- $2,490,965
- Net assets without donor restrictions
- $2,490,965
- Gross receipts
- $776,163
- Employees
- 0
- Volunteers
- 50
- Year formed
- 1967
- State of legal domicile
- NY
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.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| S LISA BISWAL | TREASURER Officer | – | $0 |
| CHUQIAO ELISE CHEN | STUDENT REP Officer | – | $0 |
| ANNE M GRILLET | PAST PRESIDE Officer | – | $0 |
| KALMAN MIGLER | SECRETARY Officer | – | $0 |
| JEFF MORRIS | VICE PRESIDE Officer | – | $0 |
| JONATHAN ROTHSTEIN | PRESIDENT Officer | – | $0 |
| SIMON A ROGERS | MEMBER AT LA Officer | – | $0 |
| EVELYNE VAN RUYMBEKE | MEMBER AT LA Officer | – | $0 |
| KELLY SCHULTZ | MEMBER AT LA Officer | – | $0 |
| DIMITRIS VLASSOPOULOS | EDITOR Officer | – | $0 |
990 for the year ended December 31, 2023: 10 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| S LISA BISWAL | TREASURER Officer | – | $0 |
| CHUQIAO ELISE CHEN | STUDENT REP Officer | – | $0 |
| ANNE M GRILLET | PAST PRESIDE Officer | – | $0 |
| KALMAN MIGLER | SECRETARY Officer | – | $0 |
| JEFF MORRIS | VICE PRESIDE Officer | – | $0 |
| JONATHAN ROTHSTEIN | PRESIDENT Officer | – | $0 |
| SIMON A ROGERS | MEMBER AT LA Officer | – | $0 |
| EVELYNE VAN RUYMBEKE | MEMBER AT LA Officer | – | $0 |
| KELLY SCHULTZ | MEMBER AT LA Officer | – | $0 |
| DIMITRIS VLASSOPOULOS | EDITOR Officer | – | $0 |
Address and contacts
- Address (IRS master file)
- 1 PHYSICS ELLIPSE, COLLEGE PARK, MD 20740-3841
- Principal officer (990 for 2024)
- JONATHAN ROTHSTEIN
- Signed the 990
- S LISA BISWAL, TREASURER
- Phone
- (860) 486-3980
- Website
- WWW.RHEOLOGY.ORG
- Return prepared by
- ZION SYNEK & ASSOCIATES
Mission
ADVANCING AND DISSEMINATING INFORMATION ON THE DEFORMATION AND FLOW OF MATTER TO THE SCIENTIFIC AND EDUCATIONAL COMMUNITIES WORLDWIDE.
Program accomplishments
- THE SOCIETY MAINTAINS A WEB SITE, CONDUCTS SEMINARS AND PUBLISHES THE "JOURNAL OF RHEOLOGY- AND THE "RHEOLOGY BULLETIN" TO DISSEMENATE INFORMATION ON THE DEFORMATION AND FLOW OF MATTER TO THE SCIENTIFIC AND EDUCATIONAL COMMUNITIES WORLDWIDE.Expenses $110,788 · grants $26,877 · revenue $634,334
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 | Not on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 13-6203476
- 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
- 1966
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U35Z)
- Assets (IRS master file)
- $2,659,231
- Income (IRS master file)
- $776,163
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2024 | $776,163 | $705,600 | $2,659,231 | XML |
| 990 | December 2023 | $317,080 | $217,752 | $2,593,852 | XML |
| 990 | December 2022 | $582,888 | $600,560 | $2,376,905 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | 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 13-6203476).
Questions about SOCIETY OF RHEOLOGY INCORPORATED
- What is the EIN of SOCIETY OF RHEOLOGY INCORPORATED?
- The employer identification number (EIN) of SOCIETY OF RHEOLOGY INCORPORATED is 13-6203476.
- Is SOCIETY OF RHEOLOGY INCORPORATED tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1966.
- Are donations to SOCIETY OF RHEOLOGY INCORPORATED tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SOCIETY OF RHEOLOGY INCORPORATED 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 SOCIETY OF RHEOLOGY INCORPORATED 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 SOCIETY OF RHEOLOGY INCORPORATED 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 SOCIETY OF RHEOLOGY INCORPORATED?
- The 990 for the year ended December 31, 2024 names JONATHAN ROTHSTEIN.
- Who are the officers and directors of SOCIETY OF RHEOLOGY INCORPORATED?
- The 990 for the year ended December 31, 2024 lists 10 people; 0 received compensation from the organization.
- How much revenue does SOCIETY OF RHEOLOGY INCORPORATED have?
- On its 990 for the year ended December 31, 2024 it reported revenue of $776,163, expenses of $705,600 and total assets of $2,659,231 at year end.
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