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California Study Inc

  • Tiburon, CA
  • Tax-exempt since April 1987
  • EIN: 94-2860620

Organization summary

Type of Nonprofit

Designated as a Organizations for any of the following purposes: religious, educational, charitable, scientific, literary, testing for public safety, fostering national or international amateur sports competition (as long as it doesn't provide athletic facilities or equipment), or the prevention of cruelty to children or animals.

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$33.9k (2025)

Expenses
$167k (2025)

Total Assets
$97.8k (2025)

Total Liabilities
$0 (2025)

Years with missing data
Source: Form 990 tax filings from 2012 to 2025

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 May
2025

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$33,881
Expenses
$167,392
Net Income
-$133,511
Net Assets
$97,847
Notable Sources of Revenue Percent of Total Revenue
Contributions $29,490
87.0%
Program Services $378
1.1%
Investment Income $4,013
11.8%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $97,847
Total Liabilities $0
Net Assets $97,847
Compensation
Key Employees and Officers Compensation Other
Marilyn Levin Nemzer (President And Director) $0 $0
Kenneth Press Nemzer (Secretary Treasurer And Director) $0 $0
Anne Gigounas (Director) $0 $0
Laura Sardis (Director) $0 $0
Joan Lisator (Director) $0 $0
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Document Links

990-EZ
Filed on Sept. 5, 2025

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

View Filing
XML

Fiscal Year Ending May
2024

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$112,671
Expenses
$68,349
Net Income
$44,322
Net Assets
$231,358
Notable Sources of Revenue Percent of Total Revenue
Contributions $101,026
89.7%
Program Services $4,319
3.8%
Investment Income $7,326
6.5%
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $231,358
Total Liabilities $0
Net Assets $231,358
Compensation
Key Employees and Officers Compensation Other
Marilyn Levin Nemzer (President And Director) $0 $0
Kenneth Press Nemzer (Secretary Treasurer And Director) $0 $0
Anne Gigounas (Director) $0 $0
Laura Sardis (Director) $0 $0
Joan Lisator (Director) $0 $0
+ View more people

Document Links

990-EZ
Filed on Aug. 21, 2024

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

View Filing
XML

Fiscal Year Ending May
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$221,563
Expenses
$69,815
Net Income
$151,748
Net Assets
$187,036
Notable Sources of Revenue Percent of Total Revenue
Contributions $216,442
97.7%
Program Services $2,876
1.3%
Investment Income $2,245
1.0%
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 $0
Assets/Debt
Total Assets $187,036
Total Liabilities $0
Net Assets $187,036
Compensation
Key Employees and Officers Compensation Related Other
Marilyn L Nemzer (President Director) $0 $0 $0
Kenneth P Nemzer (Secretary Treasurer Director) $0 $0 $0
Ann Gigounas (Director) $0 $0 $0
Elaine Bachrach (Director) $0 $0 $0
Joan Lisetor (Director) $0 $0 $0
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Document Links

990
Filed on Dec. 11, 2023

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

View Filing
PDF XML

Fiscal Year Ending May
2016

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$30,778
Expenses
$21,046
Net Income
$9,732
Net Assets
$33,456
Notable Sources of Revenue Percent of Total Revenue
Contributions $23,897
77.6%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $6,881
22.4%
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $33,456
Total Liabilities $0
Net Assets $33,456

Document Links

990-EZ

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

PDF

Fiscal Year Ending May
2015

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$57,966
Expenses
$56,379
Net Income
$1,587
Net Assets
$23,724
Notable Sources of Revenue Percent of Total Revenue
Contributions $42,214
72.8%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $15,752
27.2%
Other Revenue $0
Assets/Debt
Total Assets $23,724
Total Liabilities $0
Net Assets $23,724

Document Links

990-EZ

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

PDF

Fiscal Year Ending May
2014

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$41,610
Expenses
$41,203
Net Income
$407
Net Assets
$22,138
Notable Sources of Revenue Percent of Total Revenue
Contributions $29,249
70.3%
Program Services $0
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $12,331
29.6%
Other Revenue $0
Assets/Debt
Total Assets $22,138
Total Liabilities $0
Net Assets $22,138

Document Links

990-EZ

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

PDF
PDF (2 of 2)

Fiscal Year Ending May
2013

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$41,020
Expenses
$53,626
Net Income
-$12,606
Net Assets
$21,731
Notable Sources of Revenue Percent of Total Revenue
Contributions $13,908
33.9%
Program Services $27,112
66.1%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $41,483
Total Liabilities $19,752
Net Assets $21,731

Document Links

990-EZ

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

PDF

Fiscal Year Ending Dec.
2012

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 May
2012

Extracted Financial Data

Extracted Financial Data from 990-EZ
Revenue
$70,788
Expenses
$76,822
Net Income
-$6,034
Net Assets
$34,337
Notable Sources of Revenue Percent of Total Revenue
Contributions $44,310
62.6%
Program Services $26,478
37.4%
Investment Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $0
Assets/Debt
Total Assets $51,208
Total Liabilities $16,871
Net Assets $34,337

Document Links

990-EZ

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

PDF
PDF (2 of 2)

Fiscal Year Ending May
2011

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
PDF (2 of 2)

Fiscal Year Ending May
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 May
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
PDF (2 of 2)

Fiscal Year Ending May
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

Fiscal Year Ending May
2005

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

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

PDF

Fiscal Year Ending May
2004

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

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

PDF

Fiscal Year Ending May
2003

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

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

PDF

Fiscal Year Ending May
2002

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

Primary 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.

Updated