Rock Foundation

San Francisco, CA
Tax-exempt since Aug. 1968
EIN: 94-1671318

Receive an email when new data is available for this organization.

Type of Nonprofit

Designated as a 501(c)(3) 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.

Revenue

$5.96M (2023)

Expenses

$2.21M (2023)

Total Assets

$46.1M (2023)

Total Liabilities

$0 (2023)

Years with missing data

Source: Form 990 tax filings from 2011 to 2023

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.
2023

Revenue

$5,956,593

Expenses

$2,205,383

Net Income

$3,751,210

Net Assets

$46,143,371

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$25,840	0.4%
Dividends	$1,096,775	18.4%
Sales of Assets	$4,833,978	81.2%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,041,892	92.6%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$46,143,371
Total Liabilities	$0
Net Assets	$46,143,371

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Director)	$0	$0
Julie A Divola (Cfo/Sec)	$0	$0

990-PF

Filed on July 8, 2024

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2022

Revenue

$6,348,307

Expenses

$2,574,351

Net Income

$3,773,956

Net Assets

$42,392,161

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$33,734	0.5%
Dividends	$2,027,675	31.9%
Sales of Assets	$4,286,898	67.5%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,414,545	93.8%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$42,392,161
Total Liabilities	$0
Net Assets	$42,392,161

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Director)	$0	$0
Julie A Divola (Cfo/Sec)	$0	$0

990-PF

Filed on June 26, 2023

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2021

Revenue

$1,871,744

Expenses

$2,880,410

Net Income

-$1,008,666

Net Assets

$38,618,205

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$112	0.0%
Dividends	$1,488,251	79.5%
Sales of Assets	$387,814	20.7%
Other Income	-$4,433

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,835,475	98.4%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$38,618,205
Total Liabilities	$0
Net Assets	$38,618,205

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Director)	$0	$0
Julie A Divola (Cfo/Sec)	$0	$0

990-PF

Filed on May 9, 2022

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2020

Revenue

$1,285,281

Expenses

$1,568,696

Net Income

-$283,415

Net Assets

$39,626,871

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$5,525	0.4%
Dividends	$1,494,567	> 100%
Sales of Assets	$0
Other Income	$13,221	1.0%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$1,532,042	97.7%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$39,626,872
Total Liabilities	$1
Net Assets	$39,626,871

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Director)	$0	$0
Julie A Divola (Cfo/Sec)	$0	$0

990-PF

Filed on Aug. 30, 2021

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

PDF XML

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2019

Revenue

$1,950,904

Expenses

$2,844,605

Net Income

-$893,701

Net Assets

$39,910,286

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$54,652	2.8%
Dividends	$1,855,586	95.1%
Sales of Assets	$38,058	2.0%
Other Income	$2,608	0.1%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,827,437	99.4%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$39,910,287
Total Liabilities	$1
Net Assets	$39,910,286

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Director)	$0	$0
Julie A Divola (Cfo/Sec)	$0	$0

990-PF

Filed on Oct. 8, 2020

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

PDF XML

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2018

Revenue

$2,813,818

Expenses

$2,628,138

Net Income

$185,680

Net Assets

$40,803,988

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$111,270	4.0%
Dividends	$2,640,163	93.8%
Sales of Assets	$60,236	2.1%
Other Income	$2,149	0.1%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,571,123	97.8%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$40,803,988
Total Liabilities	$0
Net Assets	$40,803,988

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Director)	$0	$0
Julie A Divola Started 71118 (Cfo/Sec)	$0	$0
Toni Rembe Rock Thru 71118 (Cfo/Dir/Sec)	$0	$0
Jeffrey M Howson Thru 71118 (Director)	$0	$0

+ View more people

990-PF

Filed on Aug. 23, 2019

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

PDF XML

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2017

Revenue

$3,523,448

Expenses

$2,652,017

Net Income

$871,431

Net Assets

$40,618,307

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$5,204	0.1%
Dividends	$3,065,723	87.0%
Sales of Assets	$452,521	12.8%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,557,498	96.4%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$40,618,307
Total Liabilities	$0
Net Assets	$40,618,307

Compensation

Key Employees and Officers	Compensation	Other
Arthur Rock (Pres/Direct.)	$0	$0
Toni Rembe Rock (Cfo/Dir/Sec)	$0	$0
Jeffrey M Howson (Director)	$0	$0

990-PF

Filed on Oct. 12, 2018

Primary tax return for a private foundation's activities, finances, and governance

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2016

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2015

Revenue

$10,423,269

Expenses

$2,420,933

Net Income

$8,002,336

Net Assets

$33,812,728

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$310	0.0%
Dividends	$1,028,146	9.9%
Sales of Assets	$9,395,381	90.1%
Other Income	-$568

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,259,745	93.3%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$33,812,728
Total Liabilities	$0
Net Assets	$33,812,728

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2014

Revenue

$9,014,983

Expenses

$2,401,356

Net Income

$6,613,627

Net Assets

$25,810,392

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$466	0.0%
Dividends	$165,802	1.8%
Sales of Assets	$8,849,224	98.2%
Other Income	-$509

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,239,080	93.2%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$25,810,392
Total Liabilities	$0
Net Assets	$25,810,392

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2013

Revenue

$1,496,698

Expenses

$2,039,501

Net Income

-$542,803

Net Assets

$19,196,765

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$53	0.0%
Dividends	$58,557	3.9%
Sales of Assets	$1,438,005	96.1%
Other Income	$83	0.0%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$2,025,920	99.3%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$19,737,020
Total Liabilities	$540,255
Net Assets	$19,196,765

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2012

Revenue

$251,502

Expenses

$1,922,156

Net Income

-$1,670,654

Net Assets

$19,739,568

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$58	0.0%
Dividends	$119,070	47.3%
Sales of Assets	$133,687	53.2%
Other Income	-$1,313

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$1,903,800	99.0%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$19,739,568
Total Liabilities	$0
Net Assets	$19,739,568

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2011

Revenue

$34,151

Expenses

$1,759,309

Net Income

-$1,725,158

Net Assets

$21,410,222

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$459	1.3%
Dividends	$71,298	> 100%
Sales of Assets	$0
Other Income	$716	2.1%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$1,742,830	99.1%
Compensation of Officers*	$0
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$21,410,222
Total Liabilities	$0
Net Assets	$21,410,222

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2010

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2009

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2008

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

990-T

For unrelated business income from activities not substantially related to the organization's tax-exempt purpose

PDF

Fiscal Year Ending Dec.
2007

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2006

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2005

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2004

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2003

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2002

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

990-PF

Primary tax return for a private foundation's activities, finances, and governance

PDF

Fiscal Year Ending Dec.
2001

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

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.

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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 »

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Raw filing data. Includes EINs and summary financials as structured data.
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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.
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Updated June 30, 2025

Rock Foundation

Organization summary

Type of Nonprofit

Summary charts: organization finances over time

Revenue $5.96M (2023)

Expenses $2.21M (2023)

Total Assets $46.1M (2023)

Total Liabilities $0 (2023)

Tax Filings by Year

Fiscal Year Ending Dec. 2023

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending Dec. 2022

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending Dec. 2021

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending Dec. 2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2019

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2018

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2017

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending Dec. 2016

No Extracted Financial Data

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2013

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2012

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Revenue

$5.96M (2023)

Expenses

$2.21M (2023)

Total Assets

$46.1M (2023)

Total Liabilities

$0 (2023)

Fiscal Year Ending Dec.
2023

Fiscal Year Ending Dec.
2022

Fiscal Year Ending Dec.
2021

Fiscal Year Ending Dec.
2020

Fiscal Year Ending Dec.
2019

Fiscal Year Ending Dec.
2018

Fiscal Year Ending Dec.
2017

Fiscal Year Ending Dec.
2016

Fiscal Year Ending Dec.
2015

Fiscal Year Ending Dec.
2014

Fiscal Year Ending Dec.
2013

Fiscal Year Ending Dec.
2012

Fiscal Year Ending Dec.
2011

Fiscal Year Ending Dec.
2010

Fiscal Year Ending Dec.
2009

Fiscal Year Ending Dec.
2008

Fiscal Year Ending Dec.
2007

Fiscal Year Ending Dec.
2006

Fiscal Year Ending Dec.
2005

Fiscal Year Ending Dec.
2004

Fiscal Year Ending Dec.
2003

Fiscal Year Ending Dec.
2002

Fiscal Year Ending Dec.
2001