Nonprofit · EIN 64-0774122
INTERNATIONAL MARINE MINERALS SOCIETY
Tax-exempt (reinstated) · SAINT PETERSBURG, FL 33703
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $296,891 | $245,838 | $51,053 | $115,086 | $6,852 | $108,234 |
| December 31, 2024 | 990-EZ | $178,256 | $188,115 | -$9,859 | $89,111 | $6,930 | $82,181 |
| December 31, 2023 | 990 | $209,753 | $160,922 | $48,831 | $126,585 | $133 | $126,452 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $1,436
- Program service revenue
- $294,455
- Investment income
- $0
- Other revenue
- $1,000
Expenses
- Grants and similar amounts paid
- $0
- Other salaries and wages
- $29,500
- Salaries, compensation and benefits (total)
- $29,500
- Professional fundraising fees
- $0
- Travel
- $8,558
- Program services (functional)
- $232,533
- Fundraising (functional)
- $13,305
Balance sheet and other
- Total assets, start of year
- $89,111
- Total assets, end of year
- $115,086
- Total liabilities, end of year
- $6,852
- Net assets, end of year
- $108,234
- Net assets without donor restrictions
- $108,234
- Gross receipts
- $296,891
- Employees
- 1
- Volunteers
- 7
- Year formed
- 1987
- State of legal domicile
- MS
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 |
|---|---|---|---|
| TOM DETTWEILER | DIRECTOR Trustee or director | 2 | $0 |
| PEDRO MADUREIRA | DIRECTOR Trustee or director | 2 | $0 |
| KATSUHOIKO SUZUKI | DIRECTOR Trustee or director | 2 | $0 |
| ANNEMIEK VINK | DIRECTOR Trustee or director | 2 | $0 |
| MARK LUTHER | PRESIDENT Officer | 2 | $0 |
| KIRA MIZELL | SECRETARY Officer | 2 | $0 |
| JOHN C WILTSHIRE | TREASURER Officer | 2 | $0 |
990-EZ for the year ended December 31, 2024: 7 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| KIRA MIZELL | SECRETARY | 2 | $0 |
| JOHN C WILTSHIRE | president/TREASURER | 2 | $0 |
| Pedro Madureira | DIRECTOR | 2 | $0 |
| Tom Dettweiler | director | 2 | $0 |
| KATSUHIKO SUZUKI | director | 2 | $0 |
| Annemiek Vink | director | 2 | $0 |
| MARK LUTHER | president elect | 2 | $0 |
990 for the year ended December 31, 2023: 8 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Sven Petersen | director Trustee or director | 0.88 | $0 |
| KATSUHIKO SUZUKI | director Trustee or director | 0.88 | $0 |
| FILIPA MARQUES | director Trustee or director | 0.88 | $0 |
| MARK LUTHER | director Trustee or director | 0.88 | $0 |
| SAMANTHA SMITH | PRESIDENT Officer | 0.88 | $0 |
| KIRA MIZELL | SECRETARY Officer | 0.88 | $0 |
| JOHN C WILTSHIRE | president elect/TREASURER Officer | 1.76 | $0 |
| GREGORY STEMM | past PRESIDENT Officer | 0.88 | $0 |
Address and contacts
- Address (IRS master file)
- UNIVERSITY OF SOUTH FLORIDA, SAINT PETERSBURG, FL 33703-0000
- In care of
- % LAURA AZEVEDO
- Mailing address (990-N for 2021)
- 140 7th Avenue South MSL 140E, St Petersburg FL 33703
- Principal officer (990 for 2025)
- MARK LUTHER
- Principal officer (990-N for 2021)
- JOHN WILTSHIRE, 140 7th Avenue South MSL 140E, St Petersburg FL 33703
- Signed the 990
- MARK LUTHER, PRESIDENT
- Phone
- (727) 631-9579
- Website
- http://www.immsoc.org
- Return prepared by
- METZLER ADVISORY ST PETE LLC
Mission
INTERNATIONAL MARINE MINERALS SOCIETY IS A PROFESSIONAL SOCIETY WHOSE MEMBERS SHARE A COMMON INTEREST IN MARINE MINERALS AS A RESOURCE FOR STUDY AND SOUND APPLICATION TO MEET WORLD DEMANDS FOR STRATEGIC MINERALS. INTERNATIONAL MARINE MINERALS SOCIETY PROMOTES AND IMPROVES UNDERSTANDING, AIDS IN INTERCHANGE OF INFORMATION, AND ENCOURAGES PRUDENT DEVELOPMENT AND RESEARCH FOR MARINE MINERALS.
Program accomplishments
- ANNUAL INTERNATIONAL CONFERENCE, UNDERWATER MINERALS CONFERENCE WAS HELD AT THE SIRATA BEACH RESORT, IN ST. PETE BEACH, FLORIDA, USA FROM 9TH TO 14TH OF NOVEMBER 2025. THE ANNUAL GENERAL MEMBERSHIP MEETING AND ANNUAL EXECUTIVE BOARD MEETING WERE BOTH HELD IN THE SAME LOCATION, ON THE 9 OF NOVEMBER OF 2025 AT 4:00PM. THE CONFERENCE RECEIVED REVENUE FROM BOTH PARTICIPANTS AND SPONSORS.
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-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 64-0774122
- Tax-exempt status
- 501(c)(6): Business league or chamber of commerce
- Donations deductible
- No
- Exempt since
- 2015
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Community improvement and capacity building (S41)
- Assets (IRS master file)
- $115,086
- Income (IRS master file)
- $296,891
Revocation and reinstatement
- Exemption revoked
- May 15, 2014
- Posted by the IRS
- August 11, 2014
- Reinstated
- Effective May 15, 2014
From the IRS automatic revocation list: organizations that did not file a required return or e-Postcard for three consecutive years.
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $296,891 | $245,838 | $115,086 | XML |
| 990-EZ | December 2024 | $178,256 | $188,115 | $89,111 | XML |
| 990 | December 2023 | $209,753 | $160,922 | $126,585 | XML |
| 990-EZ | December 2022 | – | – | – | IRS |
| 990-N for 2021 Officer: JOHN WILTSHIRE | December 31, 2021 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2020 Officer: JOHN WILTSHIRE | December 31, 2020 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-EZ | December 2019 | – | – | – | IRS |
| 990-EZ | 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 64-0774122).
Questions about INTERNATIONAL MARINE MINERALS SOCIETY
- What is the EIN of INTERNATIONAL MARINE MINERALS SOCIETY?
- The employer identification number (EIN) of INTERNATIONAL MARINE MINERALS SOCIETY is 64-0774122.
- Is INTERNATIONAL MARINE MINERALS SOCIETY tax-exempt?
- Yes. The IRS revoked its exemption on May 15, 2014 and reinstated it effective May 15, 2014.
- Are donations to INTERNATIONAL MARINE MINERALS SOCIETY tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does INTERNATIONAL MARINE MINERALS 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 INTERNATIONAL MARINE MINERALS SOCIETY 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 INTERNATIONAL MARINE MINERALS SOCIETY 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 INTERNATIONAL MARINE MINERALS SOCIETY?
- The 990 for the year ended December 31, 2025 names MARK LUTHER.
- Who are the officers and directors of INTERNATIONAL MARINE MINERALS SOCIETY?
- The 990 for the year ended December 31, 2025 lists 7 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL MARINE MINERALS SOCIETY have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $296,891, expenses of $245,838 and total assets of $115,086 at year end.
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