Nonprofit · EIN 74-2156871
GEOLOGICAL SOCIETY OF AMERICA FOUNDATION
Tax-exempt · BOULDER, CO 80301
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| June 30, 2025 | 990 | $3,360,582 | $2,775,569 | $585,013 | $39,578,274 | $523,417 | $39,054,857 |
| June 30, 2024 | 990 | $4,847,881 | $2,227,526 | $2,620,355 | $36,717,351 | $612,484 | $36,104,867 |
| June 30, 2023 | 990 | $3,229,540 | $2,273,689 | $955,851 | $31,894,642 | $567,059 | $31,327,583 |
Financial details: 990 for the year ended June 30, 2025
Revenue
- Contributions, gifts and grants
- $1,218,788
- Membership dues
- $111,524
- Program service revenue
- $0
- Investment income
- $2,141,794
- Net gain from sales of assets
- $1,378,864
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $1,854,616
- Compensation of officers, directors and key employees
- $116,539
- Other salaries and wages
- $252,408
- Salaries, compensation and benefits (total)
- $461,220
- Professional fundraising fees
- $0
- Legal fees
- $8,412
- Accounting fees
- $26,367
- Travel
- $16,780
- Program services (functional)
- $2,043,588
- Management and general (functional)
- $515,979
- Fundraising (functional)
- $216,002
Balance sheet and other
- Total assets, start of year
- $36,717,351
- Total assets, end of year
- $39,578,274
- Total liabilities, end of year
- $523,417
- Net assets, end of year
- $39,054,857
- Publicly traded securities
- $27,951,499
- Net assets without donor restrictions
- $8,195,991
- Net assets with donor restrictions
- $30,858,866
- Gross unrelated business income
- $2,549
- Gross receipts
- $7,816,795
- Employees
- 4
- Volunteers
- 11
- Year formed
- 1980
- State of legal domicile
- CO
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 June 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| SEAN O'BRIEN | EXECUTIVE DIRECTOR Officer | 40 | $105,766 | $1,558 |
| LYDIA FOX | CHAIR Trustee or director, Officer | 20 | $0 | $0 |
| STEPHEN G WELLS | VICE CHAIR Trustee or director, Officer | 1 | $0 | $0 |
| BEN VAN DER PLUIJM | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| GEORGE DAVIS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| KATY SEMENTELLI | TRUSTEE Trustee or director | 1 | $0 | $0 |
| BRAIMAH APAMBIRE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| TERRY BRIGGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| REBECCA CALDWELL | TRUSTEE Trustee or director | 1 | $0 | $0 |
| NEILA DUNBAR | TRUSTEE Trustee or director | 1 | $0 | $0 |
| FAROUK EL-BAZ | TRUSTEE Trustee or director | 1 | $0 | $0 |
| LAUREN HEERSCHAP | TRUSTEE Trustee or director | 1 | $0 | $0 |
990 for the year ended June 30, 2024: 11 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| NEIL FISHMAN | INTERIM EXECUTIVE DIRECTOR Officer | 40 | $151,260 | $3,829 |
| LYDIA FOX | CHAIR Trustee or director, Officer | 20 | $0 | $0 |
| STEPHEN G WELLS | VICE CHAIR Trustee or director, Officer | 1 | $0 | $0 |
| REX BUCHANAN | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| GEORGE DAVIS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| KATY SEMENTELLI | TRUSTEE Trustee or director | 1 | $0 | $0 |
| TERRY BRIGGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| REBECCA CALDWELL | TRUSTEE Trustee or director | 1 | $0 | $0 |
| FAROUK EL-BAZ | TRUSTEE Trustee or director | 1 | $0 | $0 |
| RODNEY EWING | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ALBERTO GUTIERREZ | TRUSTEE Trustee or director | 1 | $0 | $0 |
990 for the year ended June 30, 2023: 11 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| DEBORA MARCINKOWSKI | EXECUTIVE DIRECTOR Officer | 40 | $140,823 |
| LYDIA FOX | CHAIR Trustee or director, Officer | 20 | $0 |
| STEPHEN G WELLS | VICE CHAIR Trustee or director, Officer | 1 | $0 |
| REX BUCHANAN | TREASURER Trustee or director, Officer | 1 | $0 |
| GEORGE DAVIS | TRUSTEE Trustee or director | 1 | $0 |
| KATY SEMENTELLI | TRUSTEE Trustee or director | 1 | $0 |
| TERRY BRIGGS | TRUSTEE Trustee or director | 1 | $0 |
| REBECCA CALDWELL | TRUSTEE Trustee or director | 1 | $0 |
| FAROUK EL-BAZ | TRUSTEE Trustee or director | 1 | $0 |
| RODNEY EWING | TRUSTEE Trustee or director | 1 | $0 |
| ALBERTO GUTIERREZ | TRUSTEE Trustee or director | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 3300 PENROSE PL, BOULDER, CO 80301-1806
- Principal officer (990 for 2024)
- LYDIA FOX, PO BOX 9140, BOULDER, CO 80301
- Signed the 990
- SEAN O'BRIEN, EXECUTIVE DIRECTOR
- Phone
- (303) 357-1054
- Website
- GSA-FOUNDATION.ORG
- Return prepared by
- BROCK AND COMPANY CPAS PC
Mission
THE MISSION OF THE GEOLOGICAL SOCIETY OF AMERICA FOUNDATION IS TO DEVELOP AND PROVIDE FUNDS TO SUPPORT THE GOALS AND PROGRAMS OF THE GEOLOGICAL SOCIETY OF AMERICA. THESE FUNDS ARE DISTRIBUTED ACCORDING TO THE NEEDS OF THE SOCIETY AND IN A MANNER CONSISTENT WITH THE DESIRE OF THE DONORS.
Program accomplishments
- DEVELOPING AND PROVIDING FUNDS TO SUPPORT THE GOALS AND PROGRAMS OF THE GEOLOGICAL SOCIETY OF AMERICA. THESE FUNDS ARE DISTRIBUTED ACCORDING TO THE NEEDS OF THE SOCIETY AND IN A MANNER CONSISTENT WITH THE DESIRE OF THE DONORS.Expenses $2,043,588 · grants $1,854,616
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 June, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | June 30, 2026 | November 16, 2026 | Not due yet |
| 2024 | June 30, 2025 | November 17, 2025 | 990 on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990 on file |
IRS record
- EIN
- 74-2156871
- 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
- 1981
- Accounting year ends
- June
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U36Z)
- Assets (IRS master file)
- $39,578,274
- Income (IRS master file)
- $7,816,795
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | June 2025 | $3,360,582 | $2,775,569 | $39,578,274 | IRS |
| 990 | June 2024 | $4,847,881 | $2,227,526 | $36,717,351 | IRS |
| 990-T | June 2024 | – | – | – | IRS |
| 990 | June 2023 | $3,229,540 | $2,273,689 | $31,894,642 | XML |
| 990-T | June 2023 | – | – | – | IRS |
| 990 | June 2022 | $2,733,399 | $1,967,319 | $29,383,375 | IRS |
| 990-T | June 2022 | – | – | – | IRS |
| 990 | June 2021 | – | – | – | IRS |
| 990-T | June 2021 | – | – | – | IRS |
| 990 | June 2020 | – | – | – | IRS |
| 990 | June 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 74-2156871).
Questions about GEOLOGICAL SOCIETY OF AMERICA FOUNDATION
- What is the EIN of GEOLOGICAL SOCIETY OF AMERICA FOUNDATION?
- The employer identification number (EIN) of GEOLOGICAL SOCIETY OF AMERICA FOUNDATION is 74-2156871.
- Is GEOLOGICAL SOCIETY OF AMERICA FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1981.
- Are donations to GEOLOGICAL SOCIETY OF AMERICA FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does GEOLOGICAL SOCIETY OF AMERICA FOUNDATION 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 GEOLOGICAL SOCIETY OF AMERICA FOUNDATION due?
- The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did GEOLOGICAL SOCIETY OF AMERICA FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended June 2025.
- Who is the principal officer of GEOLOGICAL SOCIETY OF AMERICA FOUNDATION?
- The 990 for the year ended June 30, 2025 names LYDIA FOX.
- Who are the officers and directors of GEOLOGICAL SOCIETY OF AMERICA FOUNDATION?
- The 990 for the year ended June 30, 2025 lists 12 people; 1 received compensation from the organization, the highest $105,766 (SEAN O'BRIEN, EXECUTIVE DIRECTOR).
- How much revenue does GEOLOGICAL SOCIETY OF AMERICA FOUNDATION have?
- On its 990 for the year ended June 30, 2025 it reported revenue of $3,360,582, expenses of $2,775,569 and total assets of $39,578,274 at year end.
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