Martha Lockhart Mason Fund

Pittsburgh, PA
Tax exemption issued: March 1946
EIN: 25-6018595

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.

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. Duplicate download links may indicate a resubmission or amendment to this organization's original return. Organizations with gross receipts of less than $50,000 can file the form 990-N postcard filing, which doesn’t include financial details. All Form 990 data is from the IRS.

Fiscal Year Ending Dec.
2025

Revenue

$350,298

Expenses

$498,451

Net Income

-$148,153

Net Assets

$7,224,079

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$219,529	62.7%
Sales of Assets	$130,769	37.3%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$443,264	88.9%
Compensation of Officers*	$75,769	15.2%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$7,224,079
Total Liabilities	$0
Net Assets	$7,224,079

Compensation

Key Employees and Officers	Compensation	Other
Bny Mellon N A (Trustee)	$75,769	$0

990-PF

Filed on May 6, 2026

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

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2024

Revenue

$456,669

Expenses

$469,979

Net Income

-$13,310

Net Assets

$7,369,822

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$210,768	46.2%
Sales of Assets	$245,254	53.7%
Other Income	$647	0.1%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$417,449	88.8%
Compensation of Officers*	$72,943	15.5%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$7,369,822
Total Liabilities	$0
Net Assets	$7,369,822

Compensation

Key Employees and Officers	Compensation	Other
Bny Mellon N A (Trustee)	$72,943	$0

990-PF

Filed on May 6, 2025

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

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2023

Revenue

$587,968

Expenses

$428,656

Net Income

$159,312

Net Assets

$7,378,469

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$177,093	30.1%
Sales of Assets	$410,875	69.9%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$369,893	86.3%
Compensation of Officers*	$68,402	16.0%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$7,378,469
Total Liabilities	$0
Net Assets	$7,378,469

Compensation

Key Employees and Officers	Compensation	Other
Bny Mellon N A (Trustee)	$68,402	$0

990-PF

Filed on May 7, 2024

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

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2022

Revenue

$887,268

Expenses

$482,996

Net Income

$404,272

Net Assets

$7,250,704

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$148,894	16.8%
Sales of Assets	$738,051	83.2%
Other Income	$323	0.0%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$437,430	90.6%
Compensation of Officers*	$39,675	8.2%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$7,250,704
Total Liabilities	$0
Net Assets	$7,250,704

Compensation

Key Employees and Officers	Compensation	Other
Bny Mellon N A (Trustee)	$39,675	$0

990-PF

Filed on Sept. 8, 2023

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

View Filing

Schedules ▼

PDF XML

990-T

Filed on Sept. 11, 2023

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

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2021

Revenue

$843,864

Expenses

$445,475

Net Income

$398,389

Net Assets

$6,824,740

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$198,155	23.5%
Sales of Assets	$639,639	75.8%
Other Income	$6,070	0.7%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$415,222	93.2%
Compensation of Officers*	$35,396	7.9%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,824,740
Total Liabilities	$0
Net Assets	$6,824,740

Compensation

Key Employees and Officers	Compensation	Other
Bny Mellon N A (Trustee)	$35,396	$0

990-PF

Filed on Nov. 1, 2022

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

View Filing

Schedules ▼

PDF XML

990-T

Filed on Nov. 1, 2022

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

View Filing

Schedules ▼

PDF XML

Fiscal Year Ending Dec.
2020

Revenue

$404,562

Expenses

$411,835

Net Income

-$7,273

Net Assets

$6,430,747

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$151,243	37.4%
Sales of Assets	$253,577	62.7%
Other Income	-$258

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$378,081	91.8%
Compensation of Officers*	$34,353	8.3%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,430,748
Total Liabilities	$1
Net Assets	$6,430,747

Compensation

Key Employees and Officers	Compensation	Other
Bny Mellon N A (Trustee)	$34,353	$0

990-PF

Filed on May 10, 2021

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

View Filing

Schedules ▼

XML

Fiscal Year Ending Dec.
2019

Revenue

$354,137

Expenses

$378,210

Net Income

-$24,073

Net Assets

$6,436,517

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$154,667	43.7%
Sales of Assets	$199,465	56.3%
Other Income	$5	0.0%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$351,217	92.9%
Compensation of Officers*	$34,022	9.0%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,436,517
Total Liabilities	$0
Net Assets	$6,436,517

990-PF

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

PDF

Fiscal Year Ending Dec.
2018

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.
2017

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.
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

PDF (2 of 3) PDF (3 of 3)

Fiscal Year Ending Dec.
2015

Revenue

$384,036

Expenses

$399,486

Net Income

-$15,450

Net Assets

$6,881,321

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$130,552	34.0%
Sales of Assets	$253,484	66.0%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$374,450	93.7%
Compensation of Officers*	$29,331	7.3%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,881,321
Total Liabilities	$0
Net Assets	$6,881,321

990-PF

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

PDF

Fiscal Year Ending Dec.
2014

Revenue

$547,865

Expenses

$422,583

Net Income

$125,282

Net Assets

$6,895,089

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$260,253	47.5%
Sales of Assets	$287,559	52.5%
Other Income	$53	0.0%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$369,110	87.3%
Compensation of Officers*	$29,323	6.9%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,895,089
Total Liabilities	$0
Net Assets	$6,895,089

990-PF

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

PDF

Fiscal Year Ending Dec.
2013

Revenue

$895,256

Expenses

$354,405

Net Income

$540,851

Net Assets

$6,771,264

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$238,867	26.7%
Sales of Assets	$656,389	73.3%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$327,069	92.3%
Compensation of Officers*	$27,475	7.8%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,771,264
Total Liabilities	$0
Net Assets	$6,771,264

990-PF

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

PDF

Fiscal Year Ending Dec.
2012

Revenue

$272,869

Expenses

$329,538

Net Income

-$56,669

Net Assets

$6,230,506

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$143,147	52.5%
Sales of Assets	$129,722	47.5%
Other Income	$0

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$307,569	93.3%
Compensation of Officers*	$26,130	7.9%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,230,506
Total Liabilities	$0
Net Assets	$6,230,506

990-PF

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

PDF

Fiscal Year Ending Dec.
2011

Revenue

$208,201

Expenses

$397,198

Net Income

-$188,997

Net Assets

$6,268,041

Notable Sources of Revenue		Percent of Total Revenue
Contributions Received	$0
Interest Revenue	$0
Dividends	$137,055	65.8%
Sales of Assets	$69,090	33.2%
Other Income	$2,056	1.0%

Notable Expenses		Percent of Total Expenses
Charitable Disbursements	$370,578	93.3%
Compensation of Officers*	$26,701	6.7%
* Officer compensation may be included in charitable disbursements, so Percent of Total Expenses may add up to greater than 100%.

Assets/Debt
Total Assets	$6,268,041
Total Liabilities	$0
Net Assets	$6,268,041

990-PF

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

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

Primary tax return for a nonprofit’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

Primary tax return for a nonprofit’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

Primary tax return for a nonprofit’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

Primary tax return for a nonprofit’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

Primary tax return for a nonprofit’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

Primary tax return for a nonprofit’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 financial information from tax returns processed by the IRS since the 2012 calendar years, as well as data extracted from digital filings. IRS summary data also includes limited 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 for 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?

Most organizations that have been recognized as tax exempt by the IRS have to file the 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 the 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," which does not contain financial details. Churches are not required to file Form 990.

Nonprofit Explorer has organizations that are claiming tax exemption in any of the 27 subsections of the 501(c) section of the tax code. Taxable trusts and private foundations that are required to file a form 990PF are also included.

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 Employer Identification Numbers 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.
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 »

See an issue with the data?

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 October 22, 2026

Martha Lockhart Mason Fund

Organization summary

Type of Nonprofit

Tax Filings by Year

Fiscal Year Ending Dec. 2025

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending Dec. 2024

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

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

990-T

Fiscal Year Ending Dec. 2021

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

990-T

Fiscal Year Ending Dec. 2020

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Compensation

Document Links

990-PF

Fiscal Year Ending Dec. 2019

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending Dec. 2018

No Extracted Financial Data

Document Links

990-PF

Fiscal Year Ending Dec. 2017

No Extracted Financial Data

Document Links

990-PF

Fiscal Year Ending Dec. 2016

No Extracted Financial Data

Document Links

990-PF

Fiscal Year Ending Dec. 2015

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending Dec. 2014

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending Dec. 2013

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending Dec. 2012

Extracted Financial Data

Extracted Financial Data from Form 990-PF

Document Links

990-PF

Fiscal Year Ending Dec. 2011

Fiscal Year Ending Dec.
2025

Fiscal Year Ending Dec.
2024

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