Nonprofit · EIN 23-6434390
THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY
Tax-exempt · PHILADELPHIA, PA 19104
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $77,322,000 | $89,910,000 | -$12,588,000 | $419,150,000 | $69,397,000 | $349,753,000 |
| December 31, 2024 | 990 | $93,130,000 | $93,862,000 | -$732,000 | $424,946,000 | $83,349,000 | $341,597,000 |
| December 31, 2023 | 990 | $181,250,000 | $91,822,000 | $89,428,000 | $402,392,000 | $80,282,000 | $322,110,000 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $57,680,000
- of which government grants
- $49,996,000
- Program service revenue
- $260,000
- Investment income
- $14,727,000
- Royalties
- $4,363,000
- Net rental income
- $2,000
- Net gain from sales of assets
- $3,938,000
- Other revenue
- $4,655,000
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $4,224,000
- Other salaries and wages
- $25,768,000
- Salaries, compensation and benefits (total)
- $38,391,000
- Professional fundraising fees
- $0
- Legal fees
- $859,000
- Accounting fees
- $174,000
- Occupancy
- $6,055,000
- Travel
- $531,000
- Depreciation
- $11,429,000
- Program services (functional)
- $71,192,000
- Management and general (functional)
- $17,159,000
- Fundraising (functional)
- $1,559,000
Balance sheet and other
- Total assets, start of year
- $424,946,000
- Total assets, end of year
- $419,150,000
- Total liabilities, end of year
- $69,397,000
- Net assets, end of year
- $349,753,000
- Land, buildings and equipment
- $96,200,000
- Publicly traded securities
- $230,812,000
- Net assets without donor restrictions
- $245,565,000
- Net assets with donor restrictions
- $104,188,000
- Gross unrelated business income
- $209,000
- Gross receipts
- $115,594,000
- Employees
- 377
- Volunteers
- 73
- Year formed
- 1892
- State of legal domicile
- PA
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 | Other / benefits |
|---|---|---|---|---|
| DARIO ALTIERI MD | PRESIDENT & CEO, DIRECTOR OF WISTAR CANCER CENTER Officer | 55 | $701,631 | $56,716 |
| LUIS MONTANER | PROFESSOR VP, SCIENTIFIC OPERATIONS Key employee | 55 | $518,220 | $76,944 |
| DAVID B WEINER | EXECUTIVE VICE PRESIDENT Key employee | 55 | $497,122 | $73,027 |
| GELVINA STEVENSON | VP GEN COUNSEL, SECRETARY & GOVERNMENT RELATIONS Officer | 55 | $411,550 | $45,663 |
| PAUL LIEBERMAN | PROFESSOR Highest-paid employee | 55 | $355,586 | $70,760 |
| HEATHER A STEINMAN | VP FOR BUSINESS DEVELOP & E. D. TECH Key employee | 55 | $360,818 | $40,934 |
| CONSTANTINE STOIOS | CHIEF FINANCIAL OFFICER Officer | 55 | $316,654 | $72,822 |
| MEENHARD HERLYN | PROFESSOR Highest-paid employee | 55 | $306,752 | $70,346 |
| MICHAEL CRISCUOLO | VP, DEVELOPMENT Key employee | 55 | $314,962 | $37,144 |
| CHENGYU LIANG | PROFESSOR Highest-paid employee | 55 | $267,432 | $72,287 |
| MAUREEN MURPHY | PROFESSOR Highest-paid employee | 55 | $271,408 | $62,288 |
| JOSEPH SALVINO | PROFESSOR Highest-paid employee | 55 | $292,613 | $39,284 |
| JEFFREY FAHNOE | CHIEF INFORMATION OFFICER Highest-paid employee | 55 | $271,238 | $47,789 |
| PETER SCARPATI | VP OPERATIONS Key employee | 55 | $266,748 | $36,316 |
| JOANN MENDEL | VICE PRESIDENT, HUMAN RESOURCES Key employee | 55 | $248,283 | $42,589 |
36 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| RICHARD M HOROWITZ | TRUSTEE - BOARD CHAIR Trustee or director, Officer | 4 | $0 |
| SUSAN B DILLON PHD | TRUSTEE - VICE CHAIR Trustee or director, Officer | 1 | $0 |
| STEVEN V ABRAMSON | TRUSTEE Trustee or director | 1 | $0 |
| ELIZABETH MCKEE ANDERSON | TRUSTEE Trustee or director | 2 | $0 |
| MAX BERGER | TRUSTEE Trustee or director | 1 | $0 |
| DOUGLAS S BRIGGS | TRUSTEE Trustee or director | 1 | $0 |
| IRA BRIND | TRUSTEE Trustee or director | 1 | $0 |
| RONALD CAPLAN | TRUSTEE Trustee or director | 2 | $0 |
| CATHERINE CREESE | TRUSTEE (JOINED JAN 2025) Trustee or director | 1 | $0 |
| ARTHUR DANTCHIK | TRUSTEE Trustee or director | 1 | $0 |
| DANIEL K FITZPATRICK | TRUSTEE (LEFT MAY 2025) Trustee or director | 1 | $0 |
| JOSEPH A GOLDBLUM | TRUSTEE Trustee or director | 2 | $0 |
| PERRY A LERNER | TRUSTEE Trustee or director | 1 | $0 |
| SUSAN S MCDONALD PHD | TRUSTEE Trustee or director | 2 | $0 |
| ABRAHAM L MORRIS | TRUSTEE Trustee or director | 1 | $0 |
| PATRICK OATES | TRUSTEE Trustee or director | 1 | $0 |
| ARTHUR M PAPPAS | TRUSTEE Trustee or director | 1 | $0 |
| HELEN P PUDLIN ESQ | TRUSTEE Trustee or director | 1 | $0 |
| SAMUEL V RHOADS | TRUSTEE Trustee or director | 1 | $0 |
| ROBERT H ROCK | TRUSTEE Trustee or director | 1 | $0 |
| GERALD B RORER | TRUSTEE Trustee or director | 1 | $0 |
| ALEISTER SAUNDERS | TRUSTEE Trustee or director | 1 | $0 |
| ADELE K SCHAEFFER | TRUSTEE (LEFT SEPT 2025) Trustee or director | 1 | $0 |
| MILTON S SCHNEIDER | TRUSTEE Trustee or director | 1 | $0 |
| SQUIRE SERVANCE | TRUSTEE (LEFT DEC 2025) Trustee or director | 1 | $0 |
| WILLIAM A SLAUGHTER | TRUSTEE Trustee or director | 1 | $0 |
| JOY TAYLOR | TRUSTEE Trustee or director | 1 | $0 |
| SOZI TULANTE | TRUSTEE Trustee or director | 1 | $0 |
| CAROLYN MAGILL | TRUSTEE Trustee or director | 1 | $0 |
| EDWARD ZIFF PHD | TRUSTEE Trustee or director | 1 | $0 |
| CHARLES CAIRNS | TRUSTEE Trustee or director | 1 | $0 |
| ELLIOT NORRY | TRUSTEE Trustee or director | 1 | $0 |
| JAMES LOVETT | TRUSTEE (ELECTED DEC 2025) Trustee or director | 1 | $0 |
| JOSHUA FRIEDMAN | TRUSTEE (ELECTED MAR 2025) Trustee or director | 1 | $0 |
| DAVID KRUPNICK | TRUSTEE Trustee or director | 1 | $0 |
| ELLIOT MENSCHIK | TRUSTEE (JUNE TO DEC 2025) Trustee or director | 1 | $0 |
990 for the year ended December 31, 2024: 48 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| DARIO ALTIERI MD | PRESIDENT & CEO, DIRECTOR Officer | 55 | $722,629 | $54,792 |
| DAVID B WEINER | EXECUTIVE VICE PRESIDENT Key employee | 55 | $492,577 | $69,076 |
| LUIS MONTANER | PROFESSOR VP, SCIENTIFIC O Key employee | 55 | $452,720 | $73,256 |
| GELVINA STEVENSON | VP GEN COUNSEL, SECRETARY& Officer | 55 | $388,759 | $43,897 |
| HEATHER A STEINMAN | VP FOR BUSINESS DEVELOP & Key employee | 55 | $347,749 | $40,300 |
| CONSTANTINE STOIOS | CHIEF FINANCIAL OFFICER Officer | 55 | $295,997 | $66,597 |
| MEENHARD HERLYN | PROFESSOR Highest-paid employee | 55 | $298,624 | $62,520 |
| PAUL LIEBERMAN | PROFESSOR Highest-paid employee | 55 | $285,042 | $60,447 |
| MICHAEL CRISCUOLO | VP, DEVELOPMENT Key employee | 55 | $283,859 | $55,443 |
| CHENGYU LIANG | PROFESSOR Highest-paid employee | 55 | $261,764 | $67,095 |
| MAUREEN MURPHY | PROFESSOR Highest-paid employee | 55 | $260,169 | $57,945 |
| JEFFREY FAHNOE | CHIEF INFORMATION OFFICER Highest-paid employee | 55 | $256,958 | $44,983 |
| MICHELE SCHIAVONI | VP COMMUNICATIONS & MARKETING Key employee | 55 | $267,125 | $31,808 |
| JOANN MENDEL | VICE PRESIDENT, HUMAN RESO Key employee | 55 | $236,284 | $38,855 |
| PETER SCARPATI | VP OPERATIONS Key employee | 55 | $234,961 | $32,361 |
| RICHARD M HOROWITZ | TRUSTEE - BOARD CHAIR Trustee or director, Officer | 4 | $0 | $0 |
| STEVEN V ABRAMSON | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ELIZABETH MCKEE ANDERSON | TRUSTEE Trustee or director | 2 | $0 | $0 |
| MAX BERGER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DOUGLAS S BRIGGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| IRA BRIND | TRUSTEE Trustee or director | 1 | $0 | $0 |
| RONALD CAPLAN | TRUSTEE Trustee or director | 2 | $0 | $0 |
| CATHERINE CREESE ELECTED DEC 2024 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ARTHUR DANTCHIK | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSAN B DILLON PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DANIEL K FITZPATRICK | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOSEPH A GOLDBLUM | TRUSTEE Trustee or director | 2 | $0 | $0 |
| PERRY A LERNER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSAN S MCDONALD PHD | TRUSTEE Trustee or director | 2 | $0 | $0 |
| ABRAHAM L MORRIS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| PATRICK OATES | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ARTHUR M PAPPAS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| HELEN P PUDLIN ESQ | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SAMUEL V RHOADS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ROBERT H ROCK | TRUSTEE Trustee or director | 1 | $0 | $0 |
| GERALD B RORER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ALEISTER SAUNDERS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ADELE K SCHAEFFER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MILTON S SCHNEIDER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SQUIRE SERVANCE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| WILLIAM A SLAUGHTER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOY TAYLOR | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SOZI TULANTE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| CAROLYN MAGILL ELECTED DEC 2024 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| EDWARD ZIFF PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| CHARLES CAIRNS ELECTED DEC 2024 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ELLIOT NORRY ELECTED MAR 2024 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOHN FRY LEFT NOV 2024 | TRUSTEE Trustee or director | 1 | $0 | $0 |
990 for the year ended December 31, 2023: 45 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| DARIO ALTIERI MD | PRESIDENT & CEO, DIRECTOR WISTAR CANCER CENTER Officer | 55 | $695,231 | $52,240 |
| DAVID B WEINER | EXECUTIVE VICE PRESIDENT Officer | 55 | $474,053 | $63,822 |
| LUIS MONTANER | PROFESSOR VP, SCIENTIFIC OPERATIONS Highest-paid employee | 55 | $398,122 | $69,802 |
| GELVINA STEVENSON | VP GEN COUNSEL, SECRETARY& GOV RELATIONS Officer | 55 | $361,859 | $40,228 |
| MEENHARD HERLYN | PROFESSOR Highest-paid employee | 55 | $314,306 | $65,935 |
| HEATHER A STEINMAN | VP FOR BUSINESS DEVELOP & ED TECH Officer | 55 | $332,348 | $38,587 |
| PAUL LIEBERMAN | PROFESSOR Highest-paid employee | 55 | $275,087 | $57,674 |
| MICHAEL CRISCUOLO | VP, DEVELOPMENT Officer | 55 | $253,281 | $58,940 |
| HILDEGUND ERTL | PROFESSOR Highest-paid employee | 55 | $267,406 | $44,388 |
| MAUREEN MURPHY | PROFESSOR Highest-paid employee | 55 | $252,407 | $55,028 |
| JOANN MENDEL | VICE PRESIDENT, HUMAN RESOURCES Officer | 55 | $223,372 | $36,635 |
| JOSEPH TRAINOR UNTIL MAY 2023 | CHIEF FINANCIAL OFFICER Officer | 55 | $130,191 | $19,215 |
| CONSTANTINE STOIOS BEGAN SEP 2023 | CHIEF FINANCIAL OFFICER Officer | 55 | $89,474 | $15,518 |
| RICHARD M HOROWITZ | TRUSTEE - BOARD CHAIR Trustee or director, Officer | 4 | $0 | $0 |
| STEVEN V ABRAMSON | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ELIZABETH MCKEE ANDERSON | TRUSTEE Trustee or director | 2 | $0 | $0 |
| MAX BERGER APPOINTED DEC 2023 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DOUGLAS S BRIGGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| IRA BRIND | TRUSTEE Trustee or director | 1 | $0 | $0 |
| RONALD CAPLAN | TRUSTEE Trustee or director | 2 | $0 | $0 |
| SCOTT COOPER UNTIL SEP 2023 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ARTHUR DANTCHIK | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSAN B DILLON PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| BRIAN H DOVEY UNTIL AUG 2023 | TRUSTEE Trustee or director | 2 | $0 | $0 |
| DANIEL K FITZPATRICK | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOHN FRY | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOSEPH A GOLDBLUM | TRUSTEE Trustee or director | 2 | $0 | $0 |
| PERRY A LERNER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSAN S MCDONALD PHD | TRUSTEE Trustee or director | 2 | $0 | $0 |
| ABRAHAM L MORRIS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| PATRICK OATES APPOINTED SEP 2023 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ARTHUR M PAPPAS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| HELEN P PUDLIN ESQ | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SAMUEL V RHOADS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ROBERT H ROCK | TRUSTEE Trustee or director | 1 | $0 | $0 |
| GERALD B RORER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ALEISTER SAUNDERS APPOINTED SEP 202 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ADELE K SCHAEFFER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MILTON S SCHNEIDER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SQUIRE SERVANCE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| WILLIAM A SLAUGHTER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOY TAYLOR | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SOZI TULANTE APPOINTED MAR 2023 | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DANIEL H WHEELER UNTIL JUL 2023 | TRUSTEE Trustee or director | 2 | $0 | $0 |
| EDWARD ZIFF PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 3601 SPRUCE ST, PHILADELPHIA, PA 19104-4205
- Principal officer (990 for 2025)
- CONSTANTINE STOIOS, 3601 SPRUCE STREET, PHILADELPHIA, PA 19104
- Signed the 990
- CONSTANTINE STOIOS, CHIEF FINANCIAL OFFICER
- Phone
- (215) 495-6922
- Website
- WWW.WISTAR.ORG
Mission
THE MISSION OF THE WISTAR INSTITUTE IS TO MARSHAL THE TALENTS OF OUTSTANDING SCIENTISTS THROUGH A HIGHLY ENABLED CULTURE OF BIOMEDICAL COLLABORATION AND INNOVATION IN ORDER TO SOLVE SOME OF THE WORLD'S MOST CHALLENGING AND IMPORTANT PROBLEMS IN THE FIELD OF CANCER AND IMMUNOLOGY, AND PRODUCE GROUND-BREAKING ADVANCES IN WORLD HEALTH. CONSISTENT WITH A PIONEERING LEGACY OF LEADERSHIP IN NOT-FOR-PROFIT BIOMEDICAL RESEARCH AND A TRACK-RECORD OF LIFE-SAVING CONTRIBUTIONS IN IMMUNOLOGY AND CELL BIOLOGY, THE WISTAR INSTITUTE AIMS TO PURSUE NOVEL AND COURAGEOUS RESEARCH PATHS TO LIFE SCIENCE DISCOVERY, AND TO ACCELERATE/POTENTIATE THE IMPACT OF THOSE DISCOVERIES BY SHORTENING THE PATH FROM BENCH TO BEDSIDE.
Program accomplishments
- THE WISTAR INSTITUTE IS THE NATION'S FIRST INDEPENDENT NONPROFIT INSTITUTION DEVOTED EXCLUSIVELY TO FOUNDATIONAL BIOMEDICAL RESEARCH AND TRAINING. THROUGH A CULTURE AND COMMITMENT TO BIOMEDICAL COLLABORATION AND INNOVATION, WISTAR SCIENCE LEADS TO BREAKTHROUGH EARLY-STAGE DISCOVERIES. WISTAR SCIENTISTS ARE DEDICATED TO SOLVING SOME OF THE WORLD'S MOST CHALLENGING PROBLEMS IN THE FIELDS OF CANCER AND IMMUNOLOGY, ADVANCING HUMAN HEALTH THROUGH EARLY-STAGE DISCOVERY AND TRAINING THE NEXT GENERATION OF BIOMEDICAL RESEARCHERS. CORE CENTERS WITHIN THE WISTAR INSTITUTE INCLUDES ITS INTERNATIONALLY RECOGNIZED ELLEN AND RONALD CAPLAN CANCER CENTER, DESIGNATED A NATIONAL CANCER INSTITUTE (NCI) CANCER CENTER IN 1972. IN 2015, THE CENTER RENEWED ITS DESIGNATION AND RECEIVED THE FIRST OF TWO CONSECUTIVE "EXCEPTIONAL" RATINGS THAT IT RETAINS TODAY, THE HIGHEST POSSIBLE RANKING A CANCER CENTER CAN RECEIVE. WISTAR'S HIV CURE AND VIRAL DISEASE CENTER IS ONE OF THE FEW CENTERS IN THE NATION DEDICATED TO HIV CURE RESEARCH. WISTAR SCIENTISTS AS WELL AS SCIENTISTS THROUGHOUT THE PHILADELPHIA REGION BENEFIT FROM THE TECHNOLOGICAL SUPPORT AND STATE-OF-THE-SCIENCE INSTRUMENTATION PROVIDED BY THE INSTITUTE'S SHARED RESOURCES.WISTAR'S HUBERT J.P. SCHOEMAKER EDUCATION AND TRAINING CENTER HAS LAUNCHED NEW COLLABORATIONS WITH LOCAL AND INTERNATIONAL INSTITUTIONS WITH THE GOAL OF EXPANDING LIFE SCIENCE EDUCATION IN PENNSYLVANIA AND BEYOND. WISTAR HAS A ROBUST RANGE OF STEM-BASED PROGRAMS FOCUSED ON LIFE SCIENCE CAREERS FOR STUDENTS AND ADULT LEARNERS. WISTAR'S EDUCATION & TRAINING PROGRAMS SUPPORT STEM-BASED, BIOMEDICAL RESEARCH CAREER OPPORTUNITIES FOR HIGH SCHOOL, UNDERGRADUATE, GRADUATE STUDENTS AND POSTDOCTORAL FELLOWS.Expenses $71,192,000 · revenue $260,000
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
- 23-6434390
- 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
- 1946
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Medical research (H300)
- Assets (IRS master file)
- $419,150,000
- Income (IRS master file)
- $115,594,000
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $77,322,000 | $89,910,000 | $419,150,000 | XML |
| 990-T | December 2025 | – | – | – | IRS |
| 990 | December 2024 | $93,130,000 | $93,862,000 | $424,946,000 | XML |
| 990-T | December 2024 | – | – | – | IRS |
| 990 | December 2023 | $181,250,000 | $91,822,000 | $402,392,000 | XML |
| 990-T | December 2023 | – | – | – | IRS |
| 990 | December 2022 | $90,721,000 | $85,062,000 | $381,486,000 | IRS |
| 990-T | December 2022 | – | – | – | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990-T | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990-T | 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 23-6434390).
Questions about THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY
- What is the EIN of THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY?
- The employer identification number (EIN) of THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY is 23-6434390.
- Is THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1946.
- Are donations to THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 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 THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 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 THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY 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 THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY?
- The 990 for the year ended December 31, 2025 names CONSTANTINE STOIOS.
- Who are the officers and directors of THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY?
- The 990 for the year ended December 31, 2025 lists 51 people; 15 received compensation from the organization, the highest $701,631 (DARIO ALTIERI MD, PRESIDENT & CEO, DIRECTOR OF WISTAR CANCER CENTER).
- How much revenue does THE WISTAR INSTITUTE OF ANATOMY AND BIOLOGY have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $77,322,000, expenses of $89,910,000 and total assets of $419,150,000 at year end.
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