Lowell Observatory Foundation

  • Flagstaff, AZ
  • Tax exemption issued: April 2015
  • EIN: 47-2052113

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.

Category: Science and Technology Research Institutes, Services / Single Organization Support (NTEE)

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

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$1,876,603
Expenses
$5,582,552
Net Income
-$3,705,949
Net Assets
$11,143,496
Notable Sources of Revenue Percent of Total Revenue
Contributions $555,334
29.6%
Program Services $0
Investment Income $192,742
10.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $1,128,527
60.1%
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 $11,143,496
Total Liabilities $0
Net Assets $11,143,496
Compensation
Key Employees and Officers Compensation Related Other
Logan Bayer (Trustee) $0 $0 $0
Camille Bibles (Trustee) $0 $0 $0
Patricia Bowdler (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
W David Connell (Trustee) $0 $0 $0
Neil Gavin (Trustee) $0 $0 $0
W Lowell Putnam (Trustee) $0 $12 $21,057
Donna Weistrop (Trustee) $0 $0 $0
Marjorie Mcclanahan (Board Chair) $0 $0 $0
George Putnam Iii (Board Vice-chair) $0 $0 $0
Leslie Currie (Executive Director) $0 $190,704 $25,367
Anne Labruzzo (Chief Financial Officer) $0 $182,124 $23,148
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Document Links

990
Filed on July 28, 2026

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

View Filing
XML

Fiscal Year Ending Dec.
2024

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$1,559,624
Expenses
$463,426
Net Income
$1,096,198
Net Assets
$15,249,410
Notable Sources of Revenue Percent of Total Revenue
Contributions $692,614
44.4%
Program Services $0
Investment Income $237,122
15.2%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $629,888
40.4%
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 $15,249,410
Total Liabilities $0
Net Assets $15,249,410
Compensation
Key Employees and Officers Compensation Related Other
Logan Bayer (Trustee) $0 $0 $0
Camille Bibles (Trustee) $0 $0 $0
Patricia Bowdler (Trustee) $0 $0 $0
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
W David Connell (Trustee) $0 $0 $0
Neil Gavin (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
W Lowell Putnam (Trustee) $0 $6 $18,678
Donna Weistrop (Trustee) $0 $0 $0
Marjorie Mcclanahan (Board Chair) $0 $0 $0
George Putnam Iii (Board Vice-chair) $0 $0 $0
Leslie Currie (Executive Director) $0 $188,531 $15,640
Anne Labruzzo (Chief Financial Officer) $0 $176,555 $22,166
+ View more people

Document Links

990
Filed on Aug. 14, 2025

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$3,755,865
Expenses
$432,257
Net Income
$3,323,608
Net Assets
$13,980,770
Notable Sources of Revenue Percent of Total Revenue
Contributions $3,530,530
94.0%
Program Services $0
Investment Income $231,001
6.2%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$5,666
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 $13,980,770
Total Liabilities $0
Net Assets $13,980,770
Compensation
Key Employees and Officers Compensation Related Other
Ann T Actor (Executive Director) $0 $172,107 $21,549
Anne Labruzzo (Chief Financial Officer) $0 $162,474 $30,844
W Lowell Putnam (Trustee) $0 $6 $25,356
Camille Bibles (Trustee) $0 $0 $0
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
W David Connell (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
Donna Weistrop (Trustee) $0 $0 $0
Marjorie Mcclanahan (Board Chair) $0 $0 $0
George Putnam Iii (Board Vice-chair) $0 $0 $0
+ View more people

Document Links

990
Filed on Aug. 28, 2024

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$587,737
Expenses
$379,919
Net Income
$207,818
Net Assets
$9,574,343
Notable Sources of Revenue Percent of Total Revenue
Contributions $505,724
86.0%
Program Services $0
Investment Income $195,390
33.2%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$113,377
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 $9,574,343
Total Liabilities $0
Net Assets $9,574,343
Compensation
Key Employees and Officers Compensation Related Other
Ann T Actor (Executive Director) $0 $166,065 $17,576
Anne Labruzzo (Chief Financial Officer) $0 $156,024 $21,843
W Lowell Putnam (Trustee) $0 $6 $12,486
Camille Bibles (Trustee) $0 $0 $0
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
Teri Kelley (Trustee) $0 $0 $0
Marjorie Mcclanahan (Trustee) $0 $0 $0
Donna Weistrop (Board Chair) $0 $0 $0
George Putnam Iii (Board Vice-chair) $0 $0 $0
+ View more people

Document Links

990
Filed on Aug. 17, 2023

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

View Filing
XML

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$1,073,893
Expenses
$667,968
Net Income
$405,925
Net Assets
$10,842,959
Notable Sources of Revenue Percent of Total Revenue
Contributions $642,974
59.9%
Program Services $0
Investment Income $172,317
16.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $258,602
24.1%
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 $10,878,749
Total Liabilities $35,790
Net Assets $10,842,959
Compensation
Key Employees and Officers Compensation Related Other
Ann T Actor (Executive Director) $0 $156,233 $16,913
Anne Labruzzo (Chief Financial Officer) $0 $148,969 $17,578
W Lowell Putnam (Trustee) $0 $279 $8,679
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
Marjorie Mcclanahan (Trustee) $0 $0 $0
John Menke (Trustee) $0 $0 $0
Teri Kelley (Trustee) $0 $0 $0
Donna Weistrop (Board Chair) $0 $0 $0
John Radway (Board Vice-chair Thru Feb 2021) $0 $0 $0
George Putnam Iii (Board Vice-chair As Of March 2021) $0 $0 $0
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Document Links

990
Filed on June 16, 2022

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$2,194,735
Expenses
$257,346
Net Income
$1,937,389
Net Assets
$9,575,365
Notable Sources of Revenue Percent of Total Revenue
Contributions $2,312,462
> 100%
Program Services $0
Investment Income $146,788
6.7%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$264,515
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 $9,679,419
Total Liabilities $104,054
Net Assets $9,575,365
Compensation
Key Employees and Officers Compensation Related Other
Ann T Actor (Executive Director) $0 $153,475 $16,706
Anne Labruzzo (Deputy Director For Administration) $0 $146,692 $17,383
W Lowell Putnam (Trustee) $0 $23 $8,623
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
Teri Kelley (Trustee) $0 $0 $0
John Menke (Trustee) $0 $0 $0
George Putnam Iii (Trustee) $0 $0 $0
W David Connell (Board Chair Thru May) $0 $0 $0
Donna Weistrop (Board Chair As Of June) $0 $0 $0
John Radway (Board Vice-chair) $0 $0 $0
+ View more people

Document Links

990
Filed on July 22, 2021

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

View Filing
XML

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$780,460
Expenses
$1,058,675
Net Income
-$278,215
Net Assets
$6,705,300
Notable Sources of Revenue Percent of Total Revenue
Contributions $699,109
89.6%
Program Services $0
Investment Income $107,873
13.8%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$26,522
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 $6,705,300
Total Liabilities $0
Net Assets $6,705,300
Compensation
Key Employees and Officers Compensation Related Other
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
John Menke (Trustee) $0 $0 $0
W Lowell Putnam (Trustee) $0 $71 $8,567
Donna Weistrop (Trustee) $0 $0 $0
W David Connell (Board Chair) $0 $0 $0
John A Radway Jr (Board Vice-chair) $0 $0 $0
Anne T Actor (Executive Director) $0 $147,724 $16,300
Anne Labruzzo (Deputy Director For Administration) $0 $139,113 $17,045
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990
Filed on June 27, 2020

Primary 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 Form 990
Revenue
$1,355,015
Expenses
$223,545
Net Income
$1,131,470
Net Assets
$6,023,503
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,234,620
91.1%
Program Services $0
Investment Income $100,707
7.4%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $19,688
1.5%
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 $6,023,503
Total Liabilities $0
Net Assets $6,023,503
Compensation
Key Employees and Officers Compensation Related Other
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
W Lowell Putnam (Trustee) $0 $65 $8,570
Donna Weistrop (Trustee) $0 $0 $0
W David Connell (Board Chair) $0 $0 $0
John A Radway Jr (Board Vice-chair) $0 $0 $0
Anne T Actor (Executive Director) $0 $142,931 $15,841
Anne Labruzzo (Deputy Director For Administration) $0 $107,937 $15,278
+ View more people

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990
Filed on Aug. 2, 2019

Primary 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 Form 990
Revenue
$1,688,841
Expenses
$123,419
Net Income
$1,565,422
Net Assets
$5,339,642
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,508,622
89.3%
Program Services $0
Investment Income $173,964
10.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $6,255
0.4%
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 $5,339,642
Total Liabilities $0
Net Assets $5,339,642
Compensation
Key Employees and Officers Compensation Related Other
W Lowell Putnam (Trustee) $0 $1,175 $7,523
Stephen W Brown (Trustee) $0 $0 $0
David D Chase (Trustee) $0 $0 $0
Donna Weistrop (Trustee) $0 $0 $0
John A Radway Jr (Trustee) $0 $0 $0
Virginia G Giovale (Trustee) $0 $0 $0
W David Connell (Board Chair) $0 $0 $0
Lisa Actor (Executive Director) $0 $0 $0
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990
Filed on July 12, 2018

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

View Filing
PDF XML

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$1,422,188
Expenses
$129,006
Net Income
$1,293,182
Net Assets
$3,468,940
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,341,096
94.3%
Program Services $0
Investment Income $74,873
5.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $6,219
0.4%
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 $3,468,940
Total Liabilities $0
Net Assets $3,468,940
Compensation
Key Employees and Officers Compensation Related Other
W Lowell Putnam (Trustee) $0 $20,349 $9,336
Michael Beckage (Trustee) $0 $0 $0
David Chase (Trustee) $0 $0 $0
Donna Weistrop (Trustee) $0 $0 $0
John Radway (Trustee) $0 $0 $0
Sue Durling (Trustee) $0 $0 $0
W David Connell (Board Chair) $0 $0 $0
Lisa Actor (Executive Director) $0 $0 $0
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990
Filed on Aug. 9, 2017

Primary 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 Form 990
Revenue
$2,282,132
Expenses
$13,353
Net Income
$2,268,779
Net Assets
$2,075,468
Notable Sources of Revenue Percent of Total Revenue
Contributions $2,288,607
> 100%
Program Services $0
Investment Income $32,673
1.4%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$39,148
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 $2,075,468
Total Liabilities $0
Net Assets $2,075,468
Compensation
Key Employees and Officers Compensation Related Other
Michael Beckage (Trustee) $0 $0 $0
David Chase (Trustee) $0 $0 $0
Susanne Durling (Trustee) $0 $0 $0
Bruce Kosaveach (Trustee) $0 $0 $0
Mary Lockett (Trustee) $0 $0 $0
W Lowell Putnam (Trustee) $0 $29,094 $9,986
W David Connell (Board Chair) $0 $0 $0
+ View more people

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990
Filed on Sept. 23, 2016

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

View Filing
PDF XML
PDF (2 of 2)

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$0
Expenses
$0
Net Income
$0
Net Assets
$0
Notable Sources of Revenue Percent of Total Revenue
Contributions $0
Program Services $0
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 $0
Assets/Debt
Total Assets $0
Total Liabilities $0
Net Assets $0
Compensation
Key Employees and Officers Compensation Related Other
W Lowell Putnam (Trustee) $0 $0 $0
Michael Beckage (Trustee) $0 $0 $0

Document Links

990
Filed on July 6, 2016

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

View Filing
PDF XML

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.

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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.

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

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