Nonprofit · EIN 13-3190169
THE KNEE SOCIETY INC
Tax-exempt · SCHAUMBURG, IL 60173
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $2,776,072 | $2,573,911 | $202,161 | $6,889,256 | $1,502,244 | $5,387,012 |
| December 31, 2024 | 990 | $2,478,874 | $2,118,181 | $360,693 | $5,852,254 | $1,126,491 | $4,725,763 |
| December 31, 2023 | 990 | $1,844,196 | $1,855,628 | -$11,432 | $5,164,946 | $998,876 | $4,166,070 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $192,058
- Program service revenue
- $2,419,310
- Investment income
- $141,083
- Net gain from sales of assets
- $43,652
- Other revenue
- $23,621
Expenses
- Grants and similar amounts paid
- $65,824
- Other salaries and wages
- $206,646
- Salaries, compensation and benefits (total)
- $289,772
- Professional fundraising fees
- $0
- Legal fees
- $30,972
- Accounting fees
- $17,290
- Occupancy
- $18,133
- Travel
- $105,747
- Program services (functional)
- $2,251,644
- Management and general (functional)
- $322,267
Balance sheet and other
- Total assets, start of year
- $5,852,254
- Total assets, end of year
- $6,889,256
- Total liabilities, end of year
- $1,502,244
- Net assets, end of year
- $5,387,012
- Publicly traded securities
- $4,033,719
- Net assets without donor restrictions
- $2,896,482
- Net assets with donor restrictions
- $2,490,530
- Gross receipts
- $3,058,541
- Employees
- 0
- Volunteers
- 200
- Year formed
- 1983
- State of legal domicile
- IL
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 |
|---|---|---|---|
| STEVEN B HAAS MD | PRESIDENT Trustee or director, Officer | 1 | $0 |
| CRAIG J DELLA VALLE MD | 1ST VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| RICHARD IORIO MD | 2ND VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| MICHAEL A MONT MD | 3RD VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| HENRY D CLARKE MD | IMMEDIATE PAST PRESIDENT Trustee or director, Officer | 1 | $0 |
| SCOTT M SPORER MD | SECRETARY Trustee or director, Officer | 1 | $0 |
| CHARLES L NELSON MD | TREASURER Trustee or director, Officer | 1 | $0 |
| DAVID J MAYMAN MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| JAMES I HUDDLESTON III MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| FRED D CUSHNER MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| JAMES A BROWNE MD | MEMBER-AT-LARGE Trustee or director | 1 | $0 |
| JESS H LONNER MD | MEMBER-AT-LARGE Trustee or director | 1 | $0 |
| SHUICHI MATSUDA MD | EX-OFFICIO MEMBER-AT-LARGE Trustee or director | 1 | $0 |
| OLGA FOLEY | EXECUTIVE DIRECTOR Officer | 40 | $0 |
990 for the year ended December 31, 2024: 14 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| HENRY D CLARKE MD | PRESIDENT Trustee or director, Officer | 1 | $0 |
| STEVEN B HAAS MD | 1ST VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| CRAIG J DELLA VALLE MD | 2ND VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| RICHARD IORIO MD | 3RD VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| WILLIAM J MALONEY III MD | IMMEDIATE PAST PRESIDENT Trustee or director, Officer | 1 | $0 |
| SCOTT M SPORER MD | SECRETARY Trustee or director, Officer | 1 | $0 |
| MICHAEL A MONT MD | TREASURER Trustee or director, Officer | 1 | $0 |
| DAVID J MAYMAN MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| JAMES A BROWNE MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| GWO-CHIN LEE MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| WILLIAM G HAMILTON MD | MEMBER Trustee or director | 1 | $0 |
| JESS H LONNER MD | MEMBER Trustee or director | 1 | $0 |
| SHUICHI MATSUDA MD | MEMBER Trustee or director | 1 | $0 |
| OLGA FOLEY | EXECUTIVE DIRECTOR Officer | 40 | $0 |
990 for the year ended December 31, 2023: 12 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CHRISTOPHER L PETERS MD | IMMEDIATE PAST PRESIDENT Trustee or director, Officer | 1 | $0 |
| WILLIAM J MALONEY III MD | PRESIDENT Trustee or director, Officer | 1 | $0 |
| HENRY D CLARKE MD | 1ST VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| STEVEN B HAAS MD | 2ND VICE PRESIDENT Trustee or director, Officer | 1 | $0 |
| R MICHAEL MENEGHINI MD | SECRETARY Trustee or director, Officer | 1 | $0 |
| MICHAEL A MONT MD | TREASURER Trustee or director, Officer | 1 | $0 |
| GWO-CHIN LEE MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| NICHOLAS J GIORI MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| JESS H LONNER MD | MEMBER Trustee or director | 1 | $0 |
| JAMES I HUDDLESTON III MD | COMMITTEE CHAIR Trustee or director | 1 | $0 |
| WILLIAM G HAMILTON MD | MEMBER Trustee or director | 1 | $0 |
| OLGA FOLEY CAE | EXECUTIVE DIRECTOR Officer | 40 | $0 |
Address and contacts
- Address (IRS master file)
- 1515 E WOODFIELD RD STE 345, SCHAUMBURG, IL 60173-5432
- Principal officer (990 for 2025)
- CHARLES L NELSON MD, 1515 E WOODFIELD RD 345, SCHAUMBURG, IL 60173
- Signed the 990
- CHARLES L NELSON MD, TREASURER
- Phone
- (847) 698-1632
- Website
- WWW.KNEESOCIETY.ORG
- Return prepared by
- PORTE BROWN LLC
Mission
THE KNEE SOCIETY OPERATES TO PROMOTE OUTSTANDING CARE TO PATIENTS WITH KNEE DISORDERS THROUGH INNOVATIVE RESEARCH AND EDUCATION.
Program accomplishments
- EDUCATIONAL EVENTS ARE DESIGNED TO PROVIDE PRACTICING ORTHOPAEDIC SURGEONS WITH CURRENT INFORMATION REGARDING DISORDERS OF THE KNEE, SURGICAL AND NON-SURGICAL TREATMENTS FOR THE KNEE, AND EMERGING TECHNOLOGY. SCIENTIFIC PAPERS AND SYMPOSIA WILL PRESENT INFORMATION ON TOTAL KNEE ARTHROPLASTY TO ENGANCE THE CARE OF PATIENTS WITH PAINFUL, ARTHITIC KNEE JOINTS. THE SOCIETY ALSO PROVIDES MEMBERS WITH THE ABILITY TO ORGANIZE VARIOUS EDUCATIONAL SEMINARS AND LECTURES PROVIDED ON INTERIM BASIS.Expenses $2,251,644 · grants $65,824 · revenue $2,442,931
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
- 13-3190169
- 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
- 1985
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Assets (IRS master file)
- $6,889,256
- Income (IRS master file)
- $3,058,541
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $2,776,072 | $2,573,911 | $6,889,256 | XML |
| 990 | December 2024 | $2,478,874 | $2,118,181 | $5,852,254 | XML |
| 990 | December 2023 | $1,844,196 | $1,855,628 | $5,164,946 | XML |
| 990 | December 2022 | $2,113,472 | $1,978,838 | $4,857,007 | 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 13-3190169).
Questions about THE KNEE SOCIETY INC
- What is the EIN of THE KNEE SOCIETY INC?
- The employer identification number (EIN) of THE KNEE SOCIETY INC is 13-3190169.
- Is THE KNEE SOCIETY INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1985.
- Are donations to THE KNEE SOCIETY INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does THE KNEE SOCIETY 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 THE KNEE SOCIETY 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 THE KNEE SOCIETY 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 THE KNEE SOCIETY INC?
- The 990 for the year ended December 31, 2025 names CHARLES L NELSON MD.
- Who are the officers and directors of THE KNEE SOCIETY INC?
- The 990 for the year ended December 31, 2025 lists 14 people; 0 received compensation from the organization.
- How much revenue does THE KNEE SOCIETY INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $2,776,072, expenses of $2,573,911 and total assets of $6,889,256 at year end.
Other nonprofits in SCHAUMBURG
- INFORMATION SYSTEMS AUDIT AND CONTROL ASSOCIATION INC EIN 23-7067291 · last filed 990 for 2024
- AMERICAN VETERINARY MEDICAL ASSOCIATION EIN 36-0731170 · last filed 990 for 2024
- CONCEPT SCHOOLS INC EIN 03-0503751 · last filed 990 for 2025
- AMERICAN SOCIETY OF ANESTHESIOLOGISTS EIN 36-2181944 · last filed 990 for 2024
- EVANGELICAL RETIREMENT HOMES OF GREATER CHICAGO INC EIN 36-2815382 · last filed 990 for 2023
- IRON WORKS TRI-STATE WELFARE FUND EIN 36-6599036 · last filed 990 for 2025
- EMERGENCY NURSES ASSOCIATION EIN 31-1703819 · last filed 990 for 2024
- CONGRESS OF NEUROLOGICAL SURGEONS INC UNIVERSITY OF MICHIGAN EIN 52-1660107 · last filed 990 for 2025