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International Marine Minerals Society

  • Saint Petersburg, FL
  • Tax-exempt since March 2015
  • EIN: 64-0774122

Organization summary

Type of Nonprofit

Designated as a Business leagues, chambers of commerce, real estate boards, etc, created for the improvement of business conditions.

Category: Community Improvement, Capacity Building / Promotion of Business (NTEE)

Donations to this organization are not tax deductible.

Summary charts: organization finances over time

Revenue
$178k (2024)

Expenses
$188k (2024)

Total Assets
$89.1k (2024)

Total Liabilities
$6.93k (2024)

Years with missing data
Source: Form 990 tax filings from 2011 to 2024

Tax Filings by Year

Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. Nonprofit Explorer has IRS digitized Form 990 data for filings processed in 2012 and later. If this organization filed an amended return, it may not be reflected below. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$178,256
Expenses
$188,115
Net Income
-$9,859
Net Assets
$82,181
Notable Sources of Revenue Percent of Total Revenue
Contributions $60,405
33.9%
Program Services $116,835
65.5%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $89,111
Total Liabilities $6,930
Net Assets $82,181
Compensation
Key Employees and Officers Compensation Other
Kira Mizell (Secretary) $0 $0
John C Wiltshire (President/Treasurer) $0 $0
Pedro Madureira (Director) $0 $0
Tom Dettweiler (Director) $0 $0
Katsuhiko Suzuki (Director) $0 $0
Annemiek Vink (Director) $0 $0
Mark Luther (President Elect) $0 $0
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Document Links

990-EZ
Filed on June 13, 2025

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$209,753
Expenses
$160,922
Net Income
$48,831
Net Assets
$126,452
Notable Sources of Revenue Percent of Total Revenue
Contributions $90,745
43.3%
Program Services $119,008
56.7%
Investment Income $0
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $0
Professional Fundraising Fees $0
Other Salaries and Wages $29,950
18.6%
Assets/Debt
Total Assets $126,585
Total Liabilities $133
Net Assets $126,452
Compensation
Key Employees and Officers Compensation Related Other
Sven Petersen (Director) $0 $0 $0
Katsuhiko Suzuki (Director) $0 $0 $0
Filipa Marques (Director) $0 $0 $0
Mark Luther (Director) $0 $0 $0
Samantha Smith (President) $0 $0 $0
Kira Mizell (Secretary) $0 $0 $0
John C Wiltshire (President Elect/Treasurer) $0 $0 $0
Gregory Stemm (Past President) $0 $0 $0
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Document Links

990
Filed on Feb. 27, 2024

Primary tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$188,423
Expenses
$177,318
Net Income
$11,105
Net Assets
$77,621
Notable Sources of Revenue Percent of Total Revenue
Contributions $74,980
39.8%
Program Services $112,323
59.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $77,728
Total Liabilities $107
Net Assets $77,621
Compensation
Key Employees and Officers Compensation Other
Robert Goodden (Board Member) $0 $0
Samantha Smith (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (President/Treasurer) $0 $0
Gregory Stemm (Past President) $0 $0
Sven Petersen (Board Member) $0 $0
Katsuhiko Suzuki (Board Member) $0 $0
Filipa Marques (Board Member) $0 $0
Charles Morgan (Board Member) $0 $0
Mark Luther (Board Member) $0 $0
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Document Links

990-EZ
Filed on May 3, 2023

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$142,497
Expenses
$100,639
Net Income
$41,858
Net Assets
$151,264
Notable Sources of Revenue Percent of Total Revenue
Contributions $67,500
47.4%
Program Services $72,025
50.5%
Investment Income $36
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $151,264
Total Liabilities $0
Net Assets $151,264
Compensation
Key Employees and Officers Compensation Other
Robert Goodden (Past President) $0 $0
Samantha Smith (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (Treasurer) $0 $0
Johann Rongau (Director) $0 $0
Gregory Stemm (President) $0 $0
Samantha Smith (President Elect) $0 $0
Sven Petersen (Director) $0 $0
Katsuhiko Suzuki (Director) $0 $0
Filipa Marques (Director) $0 $0
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Document Links

990-EZ
Filed on March 19, 2020

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$179,244
Expenses
$149,661
Net Income
$29,583
Net Assets
$109,406
Notable Sources of Revenue Percent of Total Revenue
Contributions $38,500
21.5%
Program Services $140,535
78.4%
Investment Income $11
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $109,406
Total Liabilities $0
Net Assets $109,406
Compensation
Key Employees and Officers Compensation Other
James R Hein (Past President) $0 $0
Samantha Smith (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (Treasurer) $0 $0
Johann Rongau (Director) $0 $0
Robert Goodden (President) $0 $0
Gregory Stemm (President Elect) $0 $0
Jung Keuk Kang (Director) $0 $0
Katsuhiko Suzuki (Director) $0 $0
Filipa Marques (Director) $0 $0
+ View more people

Document Links

990-EZ
Filed on Oct. 21, 2019

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$167,732
Expenses
$173,673
Net Income
-$5,941
Net Assets
$79,823
Notable Sources of Revenue Percent of Total Revenue
Contributions $46,011
27.4%
Program Services $120,846
72.0%
Investment Income $2
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $79,823
Total Liabilities $0
Net Assets $79,823
Compensation
Key Employees and Officers Compensation Other
James R Hein (Past Past President) $0 $0
Samantha Smith (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (Treasurer) $0 $0
Huaiyang Zhou (Director) $0 $0
Johann Denegre (Director) $0 $0
Robert Goodden (President) $0 $0
Greg Stemm (President Elect) $0 $0
Jung Keuk Kang (Director) $0 $0
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Document Links

990-EZ
Filed on Nov. 2, 2018

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$95,964
Expenses
$44,597
Net Income
$51,367
Net Assets
$85,764
Notable Sources of Revenue Percent of Total Revenue
Contributions $26,749
27.9%
Program Services $67,953
70.8%
Investment Income $3
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $85,764
Total Liabilities $0
Net Assets $85,764
Compensation
Key Employees and Officers Compensation Other
James R Hein (Past President) $0 $0
Samantha Smith (President) $0 $0
Georgy Cherkashov (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (Treasurer) $0 $0
Huaiyang Zhou (Director) $0 $0
Julien Denegre (Director) $0 $0
Robert Goodden (President Elect) $0 $0
Greg Stemm (Director) $0 $0
Jung Keuk Kang (Director) $0 $0
+ View more people

Document Links

990-EZ
Filed on Aug. 10, 2017

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$96,332
Expenses
$129,305
Net Income
-$32,973
Net Assets
$34,397
Notable Sources of Revenue Percent of Total Revenue
Contributions $37,574
39.0%
Program Services $57,319
59.5%
Investment Income $2
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $34,397
Total Liabilities $0
Net Assets $34,397
Compensation
Key Employees and Officers Compensation Other
James R Hein (Past President) $0 $0
Samantha Smith (President) $0 $0
Georgy Cherkashov (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (Treasurer) $0 $0
Huaiyang Zhou (Director) $0 $0
Julien Denegre (Director) $0 $0
Robert Goodden (President Elect) $0 $0
Greg Stemm (Director) $0 $0
Jung Keuk Kang (Director) $0 $0
+ View more people

Document Links

990-EZ
Filed on May 11, 2016

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$134,667
Expenses
$155,799
Net Income
-$21,132
Net Assets
$67,370
Notable Sources of Revenue Percent of Total Revenue
Contributions $43,307
32.2%
Program Services $89,850
66.7%
Investment Income $15
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $70,470
Total Liabilities $3,100
Net Assets $67,370
Compensation
Key Employees and Officers Compensation Other
James R Hein (President) $0 $0
Samantha Smith (President Elect) $0 $0
Georgy Cherkashov (Past President) $0 $0
Cornel De Ronde (Past President) $0 $0
Kira Mizell (Secretary) $0 $0
John C Wiltshire (Treasurer) $0 $0
Peter E Halbach (Director) $0 $0
Kaiser De Souza (Director) $0 $0
Huaiyang Zhou (Director) $0 $0
Julien Denegre (Director) $0 $0
+ View more people

Document Links

990-EZ
Filed on Aug. 6, 2015

Short form tax return for a nonprofit’s activities, finances, and governance

View Filing
PDF XML

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$112,308
Expenses
$68,872
Net Income
$43,436
Net Assets
$88,502
Notable Sources of Revenue Percent of Total Revenue
Contributions $58,500
52.1%
Program Services $48,478
43.2%
Investment Income $20
0.0%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $88,502
Total Liabilities $0
Net Assets $88,502

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$99,980
Expenses
$83,874
Net Income
$16,106
Net Assets
$45,066
Notable Sources of Revenue Percent of Total Revenue
Contributions $38,000
38.0%
Program Services $56,580
56.6%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $45,066
Total Liabilities $0
Net Assets $45,066

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$79,217
Expenses
$105,044
Net Income
-$25,827
Net Assets
$28,960
Notable Sources of Revenue Percent of Total Revenue
Contributions $13,000
16.4%
Program Services $61,717
77.9%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $28,960
Total Liabilities $0
Net Assets $28,960

No Document Links

The IRS has provided extracted financial data for this filing, but has not yet released the source documents.

Fiscal Year Ending Dec.
2010

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2009

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2008

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2007

No Extracted Financial Data

Extracted financial data is not available for the forms filed in this tax period, but Form 990 documents are available for download.

Document Links

990-EZ

Short form tax return for a nonprofit’s activities, finances, and governance

PDF

About This Data

What Is This Data?

Nonprofit Explorer includes summary data for nonprofit tax returns and full Form 990 documents, in both PDF and digital formats.

The summary data contains information processed by the IRS during the 2012-2019 calendar years; this generally consists of filings for the 2011-2018 fiscal years, but may include older records. This data release includes only a subset of what can be found in the full Form 990s.

In addition to the raw summary data, we link to PDFs and digital copies of full Form 990 documents wherever possible. This consists of separate releases by the IRS of Form 990 documents processed by the agency, which we update regularly.

We also link to copies of audits nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year since 2016. These audits are copied from the Federal Audit Clearinghouse.

Which Organizations Are Here?

Every organization that has been recognized as tax exempt by the IRS has to file Form 990 every year, unless they make less than $200,000 in revenue and have less than $500,000 in assets, in which case they have to file form 990-EZ. Organizations making less than $50,000 don’t have to file either form but do have to let the IRS they’re still in business via a Form 990N "e-Postcard."

Nonprofit Explorer has organizations claiming tax exemption in each of the 27 subsections of the 501(c) section of the tax code, and which have filed a Form 990, Form 990EZ or Form 990PF. Taxable trusts and private foundations that are required to file a form 990PF are also included. Small organizations filing a Form 990N "e-Postcard" are not included in this data.

Types of Nonprofits

There are 27 nonprofit designations based on the numbered subsections of section 501(c) of the tax code. See the list »

Get the Data

For those interested in acquiring the original data from the source, here’s where our data comes from:

  • Raw filing data. Includes EINs and summary financials as structured data.
  • Exempt Organization profiles. Includes organization names, addresses, etc. You can merge this with the raw filing data using EIN numbers.
  • Form 990 documents. Prior to 2017, these documents were obtained and processed by Public.Resource.org and ProPublica. Bulk PDF downloads since 2017 are available from the IRS.
  • Form 990 documents as XML files. Includes complete filing data (financial details, names of officers, tax schedules, etc.) in machine-readable format. Only available for electronically filed documents. Electronic data released prior to October 2021 is also available through Amazon Web Services.
  • Audits. PDFs of single or program-specific audits for nonprofit organizations that spent $750,000 or more in Federal grant money in a single fiscal year. Available for fiscal year 2015 and later.

API

The data powering this website is available programmatically, via an API. Read the API documentation »

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About Nonprofit Explorer

Nonprofit Explorer

Browse millions of annual returns filed by tax-exempt organizations with ProPublica’s Nonprofit Explorer. See details like executive compensation, revenue, expenses and more. Search for an organization or a person, or search the full text of filings.

By Andrea Suozzo, Alec Glassford, Ash Ngu and Brandon Roberts.

Design by Jeff Frankl. Additional development by Ken Schwencke, Mike Tigas, and Sisi Wei.

E-file viewer adapted from IRS e-File Viewer by Ben Getson. Code for scraping audit documents adapated from Govwiki.

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