Nonprofit · EIN 41-1523283
INTERNATIONAL SOCIETY OF DIFFERENTIATION INC
Tax-exempt · SAINT PAUL, MN 55121
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $134,368 | $219,176 | -$84,808 | $2,243,017 | $26,055 | $2,216,962 |
| December 31, 2024 | 990 | $148,608 | $256,630 | -$108,022 | $2,223,510 | $4,694 | $2,218,816 |
| December 31, 2023 | 990 | $108,832 | $151,197 | -$42,365 | $2,311,052 | $5,284 | $2,305,768 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $4,516
- Investment income
- $69,961
- Royalties
- $59,891
- Net gain from sales of assets
- $8,838
- Other revenue
- $59,891
Expenses
- Grants and similar amounts paid
- $22,556
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Accounting fees
- $2,100
- Occupancy
- $20,000
- Travel
- $15,106
- Program services (functional)
- $153,971
- Management and general (functional)
- $65,205
Balance sheet and other
- Total assets, start of year
- $2,223,510
- Total assets, end of year
- $2,243,017
- Total liabilities, end of year
- $26,055
- Net assets, end of year
- $2,216,962
- Publicly traded securities
- $838,772
- Net assets without donor restrictions
- $2,216,962
- Gross receipts
- $1,674,140
- Employees
- 0
- Volunteers
- 15
- Year formed
- 1986
- State of legal domicile
- MN
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, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| SALLY DUNWOODIE | PRESIDENT Trustee or director, Officer | 1 | $0 |
| ANNA-KATERINA HADJANTONAKIS | PRESIDENT ELECT Trustee or director, Officer | 1 | $0 |
| RICHARD BEHRINGER | PAST PRESIDENT Trustee or director, Officer | 1 | $0 |
| KATHLEEN WHITLOCK | TREASURER Trustee or director, Officer | 1 | $0 |
| LOYDIE JEROME-MAJEWSKA | EDITOR-IN-CHIEF Trustee or director | 1 | $0 |
| CRYSTAL ROGERS | EDITOR-IN-CHIEF Trustee or director | 1 | $0 |
| ROSA URIBE | EDITOR-IN-CHIEF Trustee or director | 1 | $0 |
| PAMELA HOODLESS | DIRECTOR Trustee or director | 1 | $0 |
| KAREN LIU | DIRECTOR Trustee or director | 1 | $0 |
| JOSH BRICKMAN | DIRECTOR Trustee or director | 1 | $0 |
| JAMES BRISCOE | DIRECTOR Trustee or director | 1 | $0 |
| RAJ LADHER | DIRECTOR Trustee or director | 1 | $0 |
| PETER LWIGALE | DIRECTOR Trustee or director | 1 | $0 |
| STEPHANIE MA | DIRECTOR Trustee or director | 1 | $0 |
| ELI ZELZER | DIRECTOR Trustee or director | 1 | $0 |
1 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| AMY HOPE | CEO Officer | 1 | $0 |
990 for the year ended December 31, 2024: 16 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| SALLY DUNWOODIE | PRESIDENT Trustee or director, Officer | 1 | $0 |
| ANNA-KATERINA HADJANTONAKIS | PRESIDENT ELECT Trustee or director, Officer | 1 | $0 |
| RICHARD BEHRINGER | PAST PRESIDENT Trustee or director, Officer | 1 | $0 |
| KATHLEEN WHITLOCK | SECRETARY/TREASURER Trustee or director, Officer | 1 | $0 |
| LOYDIE JEROME-MAJEWSKA | EDITOR-IN-CHIEF Trustee or director | 1 | $0 |
| CRYSTAL ROGERS | EDITOR-IN-CHIEF Trustee or director | 1 | $0 |
| ROSA URIBE | EDITOR-IN-CHIEF Trustee or director | 1 | $0 |
| PAMELA HOODLESS | DIRECTOR Trustee or director | 1 | $0 |
| KAREN LIU | DIRECTOR Trustee or director | 1 | $0 |
| JOSH BRICKMAN | DIRECTOR Trustee or director | 1 | $0 |
| JAMES BRISCOE | DIRECTOR Trustee or director | 1 | $0 |
| RAJ LADHER | DIRECTOR Trustee or director | 1 | $0 |
| PETER LWIGALE | DIRECTOR Trustee or director | 1 | $0 |
| STEPHANIE MA | DIRECTOR Trustee or director | 1 | $0 |
| ELI ZELZER | DIRECTOR Trustee or director | 1 | $0 |
| AMY HOPE | CEO Officer | 1 | $0 |
990 for the year ended December 31, 2023: 33 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| RICHARD BEHRINGER | PRESIDENT Trustee or director, Officer | 1 | $0 |
| SALLY DUNWOODIE | PRESIDENT ELECT Trustee or director, Officer | 1 | $0 |
| ELIZABETH ROBERTSON | PAST PRESIDENT Trustee or director, Officer | 1 | $0 |
| MARK LEWANDOSKI | TREASURER/SECRETARY Trustee or director, Officer | 1 | $0 |
| LOYDIE JEROME-MAJEWSKA | EDITOR IN CHIEF Trustee or director | 1 | $0 |
| ROSA URIBE | EDITOR IN CHIEF Trustee or director | 1 | $0 |
| CRYSTAL ROGERS | EDITOR IN CHIEF Trustee or director | 1 | $0 |
| JOSH BRICKMAN | DIRECTOR Trustee or director | 1 | $0 |
| JAMES BRISCOE | DIRECTOR Trustee or director | 1 | $0 |
| REBECCA BURDINE | DIRECTOR Trustee or director | 1 | $0 |
| DANNY CHAN | DIRECTOR Trustee or director | 1 | $0 |
| JYOTSNA DHAWAN | DIRECTOR Trustee or director | 1 | $0 |
| TARIQ ENVER | DIRECTOR Trustee or director | 1 | $0 |
| ANNE GRAPIN-BOTTON | DIRECTOR Trustee or director | 1 | $0 |
| PAMELA HOODLESS | DIRECTOR Trustee or director | 1 | $0 |
| RYOICHIRO KAGEYAMA | DIRECTOR Trustee or director | 1 | $0 |
| ROBERT KELLY | DIRECTOR Trustee or director | 1 | $0 |
| HEIKO LICKERT | DIRECTOR Trustee or director | 1 | $0 |
| KAREN LIU | DIRECTOR Trustee or director | 1 | $0 |
| PETER LWIGALE | DIRECTOR Trustee or director | 1 | $0 |
| STEPHANIE MA | DIRECTOR Trustee or director | 1 | $0 |
| CHRISTOF NIEHRS | DIRECTOR Trustee or director | 1 | $0 |
| ELKE OBER | DIRECTOR Trustee or director | 1 | $0 |
| ANNA PHILPOTT | DIRECTOR Trustee or director | 1 | $0 |
| STEFANO PICCOLO | DIRECTOR Trustee or director | 1 | $0 |
| OLIVIER POURQUIE | DIRECTOR Trustee or director | 1 | $0 |
| MITINORI SAITOU | DIRECTOR Trustee or director | 1 | $0 |
| SHAHRAGIM TAJBAKHSH | DIRECTOR Trustee or director | 1 | $0 |
| KATE WHITLOCK | DIRECTOR Trustee or director | 1 | $0 |
| VALERIE WILSON | DIRECTOR Trustee or director | 1 | $0 |
| YUKIKO YAMASHITA | DIRECTOR Trustee or director | 1 | $0 |
| KEN ZARET | DIRECTOR Trustee or director | 1 | $0 |
| ELI ZELZER | DIRECTOR Trustee or director | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 3285 NORTHWOOD CIR STE 100, SAINT PAUL, MN 55121-4206
- Principal officer (990 for 2025)
- AMY HOPE, 3285 NORTHWOOD CIRCLE 100, ST PAUL, MN 55121
- Signed the 990
- AMY HOPE, CEO
- Phone
- (651) 454-7250
- Website
- WWW.ISDIFFERENTIATION.ORG
- Return prepared by
- REDPATH AND COMPANY LLC
Mission
THE ISD IS A NON-PROFIT PROFESSIONAL SOCIETY DEDICATED TO ADVANCEMENT OF THE FIELD OF CELL AND DEVELOPMENTAL BIOLOGY AND THE EXCHANGE OF RESEARCH DATA. THE ISD SEEKS TO PROVIDE AN INTERNATIONAL FORUM FOR COMMUNICATION OF RESEARCH IN THREE KEY AREAS: CANCER, MORPHOGENESIS AND STEM CELLS THROUGH INTERNATIONAL MEETINGS AND THROUGH THE JOURNAL, DIFFERENTIATION.
Program accomplishments
- DIFFERENTIATION IS A JOURNAL PUBLISHED ON BEHALF OF ISD. IT PUBLISHES ARTICLES ON CELL & TISSUE DIFFERENTIATION, ORGANOGENESIS, DEVELOPMENT, CELLULAR STRUCTURE AND FUNCTION.SUBMISSIONS ON DIFFERENTIATION AT THE MOLECULAR, CELLULAR AND TISSUE LEVELS, AND THE USE OF TRANSGENIC, TARGETED MUTAGENESIS, TRANSCRIPTOMIC, COMPUTATIONAL AND SYNTHETIC APPROACHES TO PROBLEMS OF DIFFERENTIATION ARE PARTICULARLY WELCOMED.DIFFERENTIATION PUBLISHES FULL-LENGTH ARTICLES AND RESEARCH REPORTS CONTAINING ORIGINAL WORK IN ANY OF THESE AREAS. WE ALSO WELCOME REVIEWS AND COMMENTARIES ON TOPICS OF CURRENT INTEREST, AS WELL AS PERSPECTIVES.Expenses $153,971 · grants $22,556 · revenue $64,407
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 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
- 41-1523283
- 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
- 1987
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U51Z)
- Assets (IRS master file)
- $2,243,017
- Income (IRS master file)
- $1,674,140
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $134,368 | $219,176 | $2,243,017 | XML |
| 990 | December 2024 | $148,608 | $256,630 | $2,223,510 | XML |
| 990 | December 2023 | $108,832 | $151,197 | $2,311,052 | XML |
| 990 | December 2022 | $151,817 | $352,869 | $2,326,805 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | 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 41-1523283).
Questions about INTERNATIONAL SOCIETY OF DIFFERENTIATION INC
- What is the EIN of INTERNATIONAL SOCIETY OF DIFFERENTIATION INC?
- The employer identification number (EIN) of INTERNATIONAL SOCIETY OF DIFFERENTIATION INC is 41-1523283.
- Is INTERNATIONAL SOCIETY OF DIFFERENTIATION INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1987.
- Are donations to INTERNATIONAL SOCIETY OF DIFFERENTIATION INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SOCIETY OF DIFFERENTIATION 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 SOCIETY OF DIFFERENTIATION INC 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 SOCIETY OF DIFFERENTIATION INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of INTERNATIONAL SOCIETY OF DIFFERENTIATION INC?
- The 990 for the year ended December 31, 2025 names AMY HOPE.
- Who are the officers and directors of INTERNATIONAL SOCIETY OF DIFFERENTIATION INC?
- The 990 for the year ended December 31, 2025 lists 16 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL SOCIETY OF DIFFERENTIATION INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $134,368, expenses of $219,176 and total assets of $2,243,017 at year end.
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