Nonprofit · EIN 13-6161070
SOCIETY OF SURGICAL ONCOLOGY INC
Tax-exempt · ROSEMONT, IL 60018
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $8,179,210 | $7,369,496 | $809,714 | $15,510,031 | $2,925,555 | $12,584,476 |
| December 31, 2023 | 990 | $7,463,408 | $7,639,095 | -$175,687 | $12,493,241 | $2,631,060 | $9,862,181 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $1,714,716
- Program service revenue
- $5,805,825
- Investment income
- $331,123
- Royalties
- $88,381
- Other revenue
- $327,546
Expenses
- Grants and similar amounts paid
- $200,000
- Compensation of officers, directors and key employees
- $332,405
- Other salaries and wages
- $2,028,146
- Salaries, compensation and benefits (total)
- $2,934,999
- Professional fundraising fees
- $0
- Legal fees
- $2,058
- Accounting fees
- $42,063
- Occupancy
- $263,460
- Travel
- $334,521
- Depreciation
- $94,785
- Program services (functional)
- $3,892,992
- Management and general (functional)
- $3,383,732
- Fundraising (functional)
- $92,772
Balance sheet and other
- Total assets, start of year
- $13,166,005
- Total assets, end of year
- $15,510,031
- Total liabilities, end of year
- $2,925,555
- Net assets, end of year
- $12,584,476
- Land, buildings and equipment
- $225,099
- Publicly traded securities
- $9,846,445
- Net assets without donor restrictions
- $12,584,476
- Gross unrelated business income
- $32,768
- Gross receipts
- $8,179,210
- Employees
- 54
- Volunteers
- 18
- Year formed
- 1940
- 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, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| Anna Polyak RN JD | Chief Executive Officer Officer | 40 | $310,657 | $21,748 |
| Patricia Stella | Chief Learning Officer Highest-paid employee | 40 | $227,990 | $43,627 |
| Myrna Asencio MBA | Chief Financial Officer Highest-paid employee | 40 | $214,773 | $17,518 |
| Evridiki Giannopoulos | Chief Growth Officer Highest-paid employee | 40 | $190,705 | $25,690 |
| Emily Butera | Director, Growth and Engagement Highest-paid employee | 40 | $127,786 | $7,823 |
| Sara Nelli | Assistant Director, Education Highest-paid employee | 40 | $110,825 | $23,781 |
| Ronald P DeMatteo MD FSSO | Immediate Past President Trustee or director, Officer | 3 | $0 | $0 |
| Russell S Berman MD FSSO | President Trustee or director, Officer | 3 | $0 | $0 |
| Kenneth K Tanabe MD FSSO | President-Elect Trustee or director, Officer | 3 | $0 | $0 |
| Margo Shoup MD MBA FSSO | Vice President Trustee or director, Officer | 3 | $0 | $0 |
| Herbert Zeh III MD FACS FSSO | Secretary Trustee or director, Officer | 3 | $0 | $0 |
| Tari King MD FSSO | Treasurer Trustee or director, Officer | 3 | $0 | $0 |
| Kelly K Hunt MD FSSO | Past President Trustee or director, Officer | 3 | $0 | $0 |
| Callisia Clarke MD MS FSSO | Member Trustee or director | 3 | $0 | $0 |
| Ryan C Fields MD | Member Trustee or director | 3 | $0 | $0 |
9 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Melissa Hogg MD FSSO | Member Trustee or director | 3 | $0 |
| E Shelley Hwang MD MPH FSSO | Member Trustee or director | 3 | $0 |
| Matthew H G Katz MD | Member Trustee or director | 3 | $0 |
| Amanda Kong MD MS FACS FSSO DABS | Member Trustee or director | 3 | $0 |
| Toan T Nguyen MD | Community Practice Representative Trustee or director | 3 | $0 |
| Julie Hallet MD | International Representative Trustee or director | 3 | $0 |
| Alexandra Gangi MD FSSO | Director-at-Large Trustee or director | 3 | $0 |
| Micahel Lowe MD | Director-at-Large Trustee or director | 3 | $0 |
| Mediget Teshome MD MPH FACS | Director-at-Large Trustee or director | 3 | $0 |
990 for the year ended December 31, 2023: 24 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| ANNA POLYAK RN JD | CHIEF EXECUTIVE OFFICER Officer | 40 | $312,399 | $21,430 |
| PATRICIA STELLA | CHIEF LEARNING OFFICER Highest-paid employee | 40 | $168,784 | $20,312 |
| JEAN HEIS | SENIOR DIRECTOR, SCIENTIFIC MEETINGS & EDUCATION Highest-paid employee | 40 | $149,285 | $14,566 |
| EVRIDIKI GIANNOPOULOS | CHIEF GROWTH OFFICER Highest-paid employee | 40 | $132,469 | $8,771 |
| PAMELA HAYDEN | DIRECTOR, QUALITY AND RESEARCH Highest-paid employee | 40 | $113,180 | $7,405 |
| MYRNA ASENCIO | CONTROLLER Highest-paid employee | 40 | $110,603 | $6,555 |
| SANDRA L WONG MD MS FSSO | IMMEDIATE PAST PRESIDENT Trustee or director, Officer | 3 | $0 | $0 |
| KELLY K HUNT MD FSSO | PRESIDENT Trustee or director, Officer | 3 | $0 | $0 |
| RONALD P DEMATTEO MD FSSO | PRESIDENT - ELECT Trustee or director, Officer | 3 | $0 | $0 |
| RUSSELL S BERMAN MD FSSO | VICE PRESIDENT Trustee or director, Officer | 3 | $0 | $0 |
| KENNETH K TANABE MD FSSO | SECRETARY Trustee or director, Officer | 3 | $0 | $0 |
| DOUGLAS S TYLER MD MSHCT FSSO | PAST PRESIDENT Trustee or director, Officer | 3 | $0 | $0 |
| TARI KING MD FSSO | TREASURER Trustee or director, Officer | 3 | $0 | $0 |
| CALLISIA CLARKE MD MS FSSO | MEMBER Trustee or director | 3 | $0 | $0 |
| MELISSA HOGG MD FSSO | MEMBER Trustee or director | 3 | $0 | $0 |
| ANDREA V BARRIO MD FSSO | MEMBER Trustee or director | 3 | $0 | $0 |
| HERBERT J ZEH III MD FSSO | MEMBER Trustee or director | 3 | $0 | $0 |
| BRYAN M CLARY MD MBA FSSO | MEMBER Trustee or director | 3 | $0 | $0 |
| CRISTINA R FERRONE MD MS FSSO | MEMBER Trustee or director | 3 | $0 | $0 |
| ALESSANDRO GRONCHI MD FSSO | INTERNATIONAL REPRESENTATI Trustee or director | 3 | $0 | $0 |
| JILL K ONESTI MD FSSO | COMMUNITY-BASED REPRESENTA Trustee or director | 3 | $0 | $0 |
| ALEXANDRA GANGI MD FSSO | COUNCILOR-AT-LARGE Trustee or director | 3 | $0 | $0 |
| FABIAN M JOHNSTON MD MHS FSSO | COUNCILOR-AT-LARGE Trustee or director | 3 | $0 | $0 |
| CHRISTINA L ROLAND MD MS FSSO | COUNCILOR-AT-LARGE Trustee or director | 3 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 9525 BRYN MAWR AVE STE 870, ROSEMONT, IL 60018-5269
- In care of
- % SOCI
- Principal officer (990 for 2025)
- Patti Stella, 9525 West Bryn Mawr Avenue 870, Rosemont, IL 60018
- Signed the 990
- Patti Stella, CEO
- Phone
- (847) 427-1400
- Website
- www.surgonc.org
- Return prepared by
- Aprio Advisory Group LLC
Mission
The Society's purpose is to improve multidisciplinary patient care by advancing the science, education and practice of cancer surgery worldwide.
Program accomplishments
- The Society sponsors an annual cancer symposium which features plenary sessions, symposia, oral presentations, debate forums, interative poster presentations, meet-the-professsor breakfasts, award presentations and more.Expenses $1,987,151 · revenue $2,530,840
- Productions of the annals of surgical oncology, which is the official Journal of the Society of Surgical Oncology.Expenses $732,989 · revenue $2,353,322
- The Society holds an annual fellows institute meeting which features didactic sessions and hands-on laboratory components. Participation in the program is reserved for fellows in sso-approved breast fellowship programs, ACGME or RCPSC-accredited surgical oncology programs, or fellowship council-accredited HPB fellowship programs.Expenses $226,799 · revenue $1,252,411
- Other ProgramsExpenses $946,053 · grants $200,000 · revenue $506,769
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 | Check at the IRS |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 13-6161070
- 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
- 1964
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Assets (IRS master file)
- $15,510,031
- Income (IRS master file)
- $8,179,210
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $8,179,210 | $7,369,496 | $15,510,031 | XML |
| 990-T | December 2025 | – | – | – | IRS |
| 990-T | December 2024 | – | – | – | IRS |
| 990 | December 2023 | $7,463,408 | $7,639,095 | $12,493,241 | XML |
| 990-T | December 2023 | – | – | – | IRS |
| 990 | December 2022 | $6,890,475 | $7,663,305 | $11,626,528 | 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 13-6161070).
Questions about SOCIETY OF SURGICAL ONCOLOGY INC
- What is the EIN of SOCIETY OF SURGICAL ONCOLOGY INC?
- The employer identification number (EIN) of SOCIETY OF SURGICAL ONCOLOGY INC is 13-6161070.
- Is SOCIETY OF SURGICAL ONCOLOGY INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1964.
- Are donations to SOCIETY OF SURGICAL ONCOLOGY INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SOCIETY OF SURGICAL ONCOLOGY 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 SOCIETY OF SURGICAL ONCOLOGY 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 SOCIETY OF SURGICAL ONCOLOGY 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 SOCIETY OF SURGICAL ONCOLOGY INC?
- The 990 for the year ended December 31, 2025 names Patti Stella.
- Who are the officers and directors of SOCIETY OF SURGICAL ONCOLOGY INC?
- The 990 for the year ended December 31, 2025 lists 24 people; 6 received compensation from the organization, the highest $310,657 (Anna Polyak RN JD, Chief Executive Officer).
- How much revenue does SOCIETY OF SURGICAL ONCOLOGY INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $8,179,210, expenses of $7,369,496 and total assets of $15,510,031 at year end.
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