Nonprofit · EIN 23-1353269
AMERICAN PHILOSOPHICAL SOCIETY
Tax-exempt · PHILADELPHIA, PA 19106
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2024 | 990 | $20,391,804 | $15,571,638 | $4,820,166 | $310,248,157 | $7,715,566 | $302,532,591 |
| December 31, 2023 | 990 | $13,318,942 | $14,213,316 | -$894,374 | $292,035,358 | $8,222,905 | $283,812,453 |
Financial details: 990 for the year ended December 31, 2024
Revenue
- Contributions, gifts and grants
- $3,265,366
- of which government grants
- $33,879
- Program service revenue
- $150,943
- Investment income
- $16,906,951
- Net rental income
- $20,255
- Net gain from sales of assets
- $10,325,167
- Other revenue
- $68,544
Expenses
- Grants and similar amounts paid
- $1,754,046
- Compensation of officers, directors and key employees
- $1,239,765
- Other salaries and wages
- $3,982,801
- Salaries, compensation and benefits (total)
- $6,565,971
- Professional fundraising fees
- $0
- Legal fees
- $55,363
- Accounting fees
- $111,332
- Occupancy
- $909,846
- Depreciation
- $677,885
- Program services (functional)
- $11,302,992
- Management and general (functional)
- $3,472,986
- Fundraising (functional)
- $795,660
Balance sheet and other
- Total assets, start of year
- $292,035,358
- Total assets, end of year
- $310,248,157
- Total liabilities, end of year
- $7,715,566
- Net assets, end of year
- $302,532,591
- Land, buildings and equipment
- $12,342,546
- Publicly traded securities
- $207,388,639
- Net assets without donor restrictions
- $41,926,525
- Net assets with donor restrictions
- $260,606,066
- Gross receipts
- $38,053,639
- Employees
- 83
- Volunteers
- 174
- Year formed
- 1743
- 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, 2024, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| Dr Robert M Hauser | CEO Trustee or director, Officer | 40 | $341,000 | $35,275 |
| Michelle McDonald | Dir of Library Officer | 40 | $257,373 | $44,445 |
| John Wolfe | Financial Offic Officer | 40 | $251,750 | $48,992 |
| Dr Patrick Spero | CEO Officer | 40 | $231,916 | $29,014 |
| Linda Jacobs | Development Direct | 40 | $192,610 | $29,601 |
| Gary David | Asso Dir of Collec | 40 | $139,050 | $37,238 |
| Mary Grace Wahl | Assoc Dir of Colle | 40 | $113,810 | $46,183 |
| Bayard Miller | Assoc Dir of Digit | 40 | $120,120 | $27,041 |
| Linda Musumeci | Dir of Grants & Fe | 40 | $122,802 | $10,416 |
| Dr Joanna Aizenberg | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Julia H Gaisser | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Jacqueline K Barton | V.P./Council Trustee or director, Officer | 1 | $0 | $0 |
| Dr Dusa McDuff | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Clyde F Barker | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Linda K Kerber | Councilor Trustee or director | 1 | $0 | $0 |
28 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Dr Vijay Kumar | Councilor Trustee or director | 1 | $0 |
| Dr Jianguo Liu | Councilor Trustee or director | 1 | $0 |
| Dr Anne Case | Councilor Trustee or director | 1 | $0 |
| Dr David Skorton | Councilor/Secy Trustee or director, Officer | 1 | $0 |
| Dr Richard E Lenski | Councilor Trustee or director | 1 | $0 |
| John S Reed | Councilor Trustee or director | 1 | $0 |
| Linda Greenhouse | Councilor Trustee or director | 1 | $0 |
| Dr Nina Jablonski | V.P./Council Trustee or director, Officer | 1 | $0 |
| Sir Mark Thompson | Councilor Trustee or director | 1 | $0 |
| Dr Kathleen Hall Jamieson | Councilor Trustee or director | 1 | $0 |
| Dr Andrew Delbanco | Councilor Trustee or director | 1 | $0 |
| Dr Paul W Kroll | Councilor Trustee or director | 1 | $0 |
| Dr Leslie C Aiello | Curator/Council Trustee or director, Officer | 1 | $0 |
| Mr Richard B Worley | Councilor Trustee or director | 1 | $0 |
| Dr Jonathan R Cole | Councilor Trustee or director | 1 | $0 |
| Dr Ronald M Fairman | Councilor Trustee or director | 1 | $0 |
| Margaret H Marshall | Councilor Trustee or director | 1 | $0 |
| Dr Marna C Whittington | Councilor/Treas Trustee or director, Officer | 1 | $0 |
| Dr Alan S Blinder | Councilor Trustee or director | 1 | $0 |
| Robert James Miller | Councilor Trustee or director | 1 | $0 |
| Dr Harriet Zuckerman | Councilor Trustee or director | 1 | $0 |
| Dr David Hollinger | Councilor Trustee or director | 1 | $0 |
| Dr Keith S Thomson | Curator/Council Trustee or director, Officer | 1 | $0 |
| Dr Roger S Bagnall | Pres/Councilor Trustee or director, Officer | 1 | $0 |
| Dr William H Hooke | Councilor Trustee or director | 1 | $0 |
| Dr Caroline W Bynum | Councilor/V.P. Trustee or director, Officer | 1 | $0 |
| Dr Douglas S Massey | Councilor Trustee or director | 1 | $0 |
| Dr John C Van Horne | Councilor Trustee or director | 1 | $0 |
990 for the year ended December 31, 2023: 35 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| Dr Robert M Hauser | Exc Officer Trustee or director, Officer | 40 | $284,921 | $29,960 |
| John Wolfe | Financial Offic Officer | 40 | $245,722 | $34,226 |
| Linda Jacobs | Development Direct | 40 | $187,552 | $27,916 |
| Patrick Spero | Librarian Officer | 40 | $145,944 | $33,576 |
| Ann Westcott | Meetings Director | 40 | $139,607 | $17,607 |
| Nora Monroe | Membership Directo | 40 | $133,773 | $17,790 |
| Dr Joanna Aizenberg | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Julia H Gaisser | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Jacqueline K Barton | V.P./Council Trustee or director, Officer | 1 | $0 | $0 |
| Dr Dusa McDuff | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Clyde F Barker | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Linda K Kerber | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Jianguo Liu | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Anne Case | Councilor Trustee or director | 1 | $0 | $0 |
| Dr David Skorton | Councilor/Secy Trustee or director, Officer | 1 | $0 | $0 |
| Dr Richard E Lenski | Councilor Trustee or director | 1 | $0 | $0 |
| John S Reed | Councilor Trustee or director | 1 | $0 | $0 |
| Linda Greenhouse | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Nina Jablonski | V.P./Council Trustee or director, Officer | 1 | $0 | $0 |
| Sir Mark Thompson | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Kathleen Hall Jamieson | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Andrew Delbanco | Councilor Trustee or director | 1 | $0 | $0 |
| Dr John C Van Horne | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Leslie C Aiello | Curator/Council Trustee or director, Officer | 1 | $0 | $0 |
| Mr Richard B Worley | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Jonathan R Cole | Councilor Trustee or director | 1 | $0 | $0 |
| Dr William H Hooke | Councilor Trustee or director | 1 | $0 | $0 |
| Margaret H Marshall | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Marna C Whittington | Councilor/Treas Trustee or director, Officer | 1 | $0 | $0 |
| Dr Alan S Blinder | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Harriet Zuckerman | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Douglas S Massey | Councilor Trustee or director | 1 | $0 | $0 |
| Dr Keith S Thomson | Curator/Council Trustee or director, Officer | 1 | $0 | $0 |
| Dr Roger S Bagnall | Pres/Councilor Trustee or director, Officer | 1 | $0 | $0 |
| Dr Caroline W Bynum | Councilor/V.P. Trustee or director, Officer | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 104 S 5TH ST, PHILADELPHIA, PA 19106-3309
- Principal officer (990 for 2024)
- Dr Patrick Spero, 104 SOUTH FIFTH STREET, PHILADELPHIA, PA 191063387
- Signed the 990
- Dr Patrick Spero, CEO
- Phone
- (215) 440-3400
- Website
- www.amphilsoc.org
- Return prepared by
- Howe Keller & Hunter PC
Mission
The American Philosophical Society, the oldest learned society in the United States, was founded in 1743 by Benjamin Franklin for the purpose of "promoting useful knowledge." In the 21st century the Society sustains this mission in three principal ways. It honors and engages distinguished scientists, humanists, social scientists, and leaders in civic and cultural affairs through elected membership and opportunities for interdisciplinary, intellectual fellowship, particularly in the semi-annual Meetings in Philadelphia. It supports research and discovery through grants and fellowships, lectures, publications, prizes, exhibitions, and public education. It serves scholars through a research library of manuscripts and other collections internationally recognized for their enduring historic value. The American Philosophical Society's current activities reflect the founder's spirit of inquiry, provide a forum for the free exchange of ideas, and convey the conviction of its members that intel
Program accomplishments
- The Society's printed Yearbook for 2024 gives a complete account of the Society's activities. A copy will be furnished upon request. Details concerning contributions and research grants are on hand and are available for inspection at the Society's office.Expenses $11,302,992 · grants $1,754,046 · revenue $150,943
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
- 23-1353269
- 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
- 1934
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A700)
- Assets (IRS master file)
- $310,248,157
- Income (IRS master file)
- $38,053,639
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2024 | $20,391,804 | $15,571,638 | $310,248,157 | XML |
| 990-T | December 2024 | – | – | – | IRS |
| 990 | December 2023 | $13,318,942 | $14,213,316 | $292,035,358 | XML |
| 990-T | December 2023 | – | – | – | IRS |
| 990 | December 2022 | $12,299,474 | $13,165,105 | $267,448,047 | 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 23-1353269).
Questions about AMERICAN PHILOSOPHICAL SOCIETY
- What is the EIN of AMERICAN PHILOSOPHICAL SOCIETY?
- The employer identification number (EIN) of AMERICAN PHILOSOPHICAL SOCIETY is 23-1353269.
- Is AMERICAN PHILOSOPHICAL SOCIETY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1934.
- Are donations to AMERICAN PHILOSOPHICAL SOCIETY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does AMERICAN PHILOSOPHICAL SOCIETY 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 AMERICAN PHILOSOPHICAL SOCIETY 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 AMERICAN PHILOSOPHICAL SOCIETY 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 AMERICAN PHILOSOPHICAL SOCIETY?
- The 990 for the year ended December 31, 2024 names Dr Patrick Spero.
- Who are the officers and directors of AMERICAN PHILOSOPHICAL SOCIETY?
- The 990 for the year ended December 31, 2024 lists 43 people; 9 received compensation from the organization, the highest $341,000 (Dr Robert M Hauser, CEO).
- How much revenue does AMERICAN PHILOSOPHICAL SOCIETY have?
- On its 990 for the year ended December 31, 2024 it reported revenue of $20,391,804, expenses of $15,571,638 and total assets of $310,248,157 at year end.
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