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Lowell Observatory

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 / Astronomy (NTEE)

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$20.2M (2023)

Expenses
$18.6M (2023)

Total Assets
$85.4M (2023)

Total Liabilities
$29M (2023)

Source: Form 990 tax filings from 2011 to 2023

Tax Filings and Audits 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.

Audits are required to be submitted by nonprofit organizations that spend $750,000 or more in federal grant money in a fiscal year. "Single audits" look at the entire organization's finances and compliance, while other audits are program specific. Nonprofit Explorer has PDFs of audits for some nonprofits for fiscal year 2015 and later. Audit data is from the Federal Audit Clearinghouse.

Fiscal Year Ending Dec.
2023

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$20,163,990
Expenses
$18,645,161
Net Income
$1,518,829
Net Assets
$56,413,121
Notable Sources of Revenue Percent of Total Revenue
Contributions $18,265,662
90.6%
Program Services $4,915,593
24.4%
Investment Income $176,873
0.9%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$3,790,090
Net Inventory Sales $429,037
2.1%
Other Revenue $166,915
0.8%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,352,130
7.3%
Professional Fundraising Fees $0
Other Salaries and Wages $7,690,538
41.2%
Assets/Debt
Total Assets $85,437,670
Total Liabilities $29,024,549
Net Assets $56,413,121
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Executive Director) $200,833 $0 $37,311
Massey Philip (Astronomer) $178,598 $0 $17,207
West Michael (Astronomer) $174,067 $0 $11,907
Hunter Deidre (Astronomer) $173,571 $0 $24,081
Actor Ann (Chief Philanthropy Officer) $172,107 $0 $21,549
Levine Stephen (Director Of Education) $169,245 $0 $22,216
Keller Christoph (Director Of Science) $169,086 $0 $41,501
Labruzzo Anne (Chief Financial Officer) $162,474 $0 $30,844
Bosh Amanda (Chief Operations Officer) $161,680 $0 $30,244
Kuehn Kyler (Director Of Technology) $151,194 $0 $32,924
Prato Lisa (Astronomer) $150,738 $0 $21,023
Sawyer David (Technical Project Manager) $148,887 $0 $20,874
Putnam W Lowell (Trustee) $6 $0 $25,357

Document Links

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$20,035,165
Expenses
$19,188,129
Net Income
$847,036
Net Assets
$55,588,382
Notable Sources of Revenue Percent of Total Revenue
Contributions $12,847,808
64.1%
Program Services $5,903,798
29.5%
Investment Income $43,412
0.2%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $351,772
1.8%
Net Inventory Sales $365,771
1.8%
Other Revenue $522,604
2.6%
Notable Expenses Percent of Total Expenses
Executive Compensation $369,702
1.9%
Professional Fundraising Fees $0
Other Salaries and Wages $8,813,558
45.9%
Assets/Debt
Total Assets $78,976,661
Total Liabilities $23,388,279
Net Assets $55,588,382
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Executive Director) $189,691 $0 $24,136
Keller Christoph (Director Of Science) $183,459 $0 $20,491
Massey Philip (Astronomer) $171,961 $0 $16,634
West Michael (Astronomer) $167,600 $0 $9,618
Hunter Deidre (Astronomer) $166,871 $0 $20,563
Actor Ann (Chief Philanthropy Officer) $166,065 $0 $17,576
Levine Stephen (Astronomer) $158,502 $0 $17,386
Labruzzo Anne (Chief Financial Officer) $156,024 $0 $21,843
Bosh Amanda (Chief Operations Officer) $151,518 $0 $21,136
Sawyer David (Technical Project Manager) $151,340 $0 $15,955
Putnam W Lowell (Trustee) $6 $0 $12,486

Document Links

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$22,823,113
Expenses
$16,074,661
Net Income
$6,748,452
Net Assets
$52,868,862
Notable Sources of Revenue Percent of Total Revenue
Contributions $16,708,119
73.2%
Program Services $4,829,399
21.2%
Investment Income $14,004
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $830,832
3.6%
Net Inventory Sales $158,046
0.7%
Other Revenue $282,713
1.2%
Notable Expenses Percent of Total Expenses
Executive Compensation $359,611
2.2%
Professional Fundraising Fees $0
Other Salaries and Wages $7,038,269
43.8%
Assets/Debt
Total Assets $78,377,713
Total Liabilities $25,508,851
Net Assets $52,868,862
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Director) $165,023 $0 $19,083
Massey Philip (Astronomer) $161,788 $0 $15,937
West Michael (Director For Science) $157,143 $0 $9,043
Actor Ann T (Chief Philanthropy Officer) $156,233 $0 $16,913
Levine Stephen (Astronomer) $153,518 $0 $15,810
Hunter Deidre (Astronomer) $153,021 $0 $15,837
Labruzzo Anne (Chief Financial Officer) $148,969 $0 $17,578
Putnam W Lowell (Trustee Sole) $279 $0 $8,679

Document Links

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$16,133,508
Expenses
$13,478,815
Net Income
$2,654,693
Net Assets
$46,910,028
Notable Sources of Revenue Percent of Total Revenue
Contributions $12,195,142
75.6%
Program Services $3,641,276
22.6%
Investment Income $12,208
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $87,151
0.5%
Net Inventory Sales $83,668
0.5%
Other Revenue $114,063
0.7%
Notable Expenses Percent of Total Expenses
Executive Compensation $354,016
2.6%
Professional Fundraising Fees $0
Other Salaries and Wages $6,354,224
47.1%
Assets/Debt
Total Assets $70,100,548
Total Liabilities $23,190,520
Net Assets $46,910,028
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Director) $163,080 $0 $18,216
Massey Philip (Astronomer) $159,097 $0 $15,698
Schleicher David (Astronomer) $155,225 $0 $16,562
West Michael (Deputy Director For Science) $154,245 $0 $8,860
Actor Ann T (Deputy Director For Development) $153,475 $0 $16,706
Hunter Deidre (Astronomer) $150,559 $0 $15,593
Labruzzo Anne (Deputy Director For Administration) $146,692 $0 $17,383
Putnam W Lowell (Trustee Sole) $23 $0 $8,623

Document Links

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$29,221,520
Expenses
$14,346,917
Net Income
$14,874,603
Net Assets
$44,406,194
Notable Sources of Revenue Percent of Total Revenue
Contributions $22,432,053
76.8%
Program Services $4,273,398
14.6%
Investment Income $9,825
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $2,065,144
7.1%
Net Inventory Sales $318,612
1.1%
Other Revenue $122,488
0.4%
Notable Expenses Percent of Total Expenses
Executive Compensation $369,265
2.6%
Professional Fundraising Fees $0
Other Salaries and Wages $6,190,369
43.1%
Assets/Debt
Total Assets $65,145,325
Total Liabilities $20,739,131
Net Assets $44,406,194
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey C (Director) $186,611 $0 $17,858
Massey Philip (Astronomer) $155,163 $0 $16,723
Schleicher David (Astronomer) $151,552 $0 $16,407
West Michael (Deputy Director For Science) $150,949 $0 $8,584
Actor Anne T (Deputy Director For Development) $147,724 $0 $16,300
Hunter Deidre (Astronomer) $146,279 $0 $17,814
Labruzzo Anne (Deputy Director For Administration) $139,113 $0 $17,045
Putnam W Lowell (Trustee Sole) $71 $0 $8,567

Document Links

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$16,797,299
Expenses
$12,829,418
Net Income
$3,967,881
Net Assets
$31,493,916
Notable Sources of Revenue Percent of Total Revenue
Contributions $11,300,815
67.3%
Program Services $4,994,781
29.7%
Investment Income $2,268
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $141,077
0.8%
Net Inventory Sales $293,157
1.7%
Other Revenue $65,201
0.4%
Notable Expenses Percent of Total Expenses
Executive Compensation $306,381
2.4%
Professional Fundraising Fees $0
Other Salaries and Wages $5,695,408
44.4%
Assets/Debt
Total Assets $48,062,648
Total Liabilities $16,568,732
Net Assets $31,493,916
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey C (Director) $157,137 $0 $17,394
Massey Philip (Astronomer) $151,139 $0 $16,395
Schleicher David (Astronomer) $147,512 $0 $16,078
West Michael (Deputy Director For Science) $146,492 $0 $8,225
Actor Anne T (Deputy Director For Development) $142,931 $0 $15,841
Hunter Diedre (Astronomer) $142,455 $0 $17,609
Labruzzo Anne (Deputy Director For Administration) $107,937 $0 $15,278
Putnam W Lowell (Trustee Sole) $65 $0 $8,570

Document Links

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$22,523,259
Expenses
$12,648,803
Net Income
$9,874,456
Net Assets
$27,676,043
Notable Sources of Revenue Percent of Total Revenue
Contributions $17,637,617
78.3%
Program Services $4,444,956
19.7%
Investment Income $3,661
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $81,350
0.4%
Net Inventory Sales $229,689
1.0%
Other Revenue $125,986
0.6%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,087,364
8.6%
Professional Fundraising Fees $0
Other Salaries and Wages $4,179,555
33.0%
Assets/Debt
Total Assets $47,935,722
Total Liabilities $20,259,679
Net Assets $27,676,043
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Director) $156,208 $0 $16,212
Dunham Edward (Instrument Manager) $154,324 $0 $15,413
Massey Philip (Astronomer) $149,224 $0 $15,143
Schleicher David (Astronomer) $145,120 $0 $14,844
West Michael (Deputy Director For Science) $143,825 $0 $7,980
Actor Anne T (Deputy Director For Development) $141,320 $0 $14,654
Labruzzo Anne (Deputy Director For Administraton) $91,211 $0 $13,187
Putnam W Lowell (Trustee Sole) $1,175 $0 $7,523

Document Links

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$11,056,035
Expenses
$12,957,893
Net Income
-$1,901,858
Net Assets
$17,623,026
Notable Sources of Revenue Percent of Total Revenue
Contributions $7,675,056
69.4%
Program Services $2,852,310
25.8%
Investment Income $37,614
0.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising -$16,659
Sales of Assets $225,291
2.0%
Net Inventory Sales $191,569
1.7%
Other Revenue $90,854
0.8%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,090,146
8.4%
Professional Fundraising Fees $0
Other Salaries and Wages $4,291,499
33.1%
Assets/Debt
Total Assets $48,684,255
Total Liabilities $31,061,229
Net Assets $17,623,026
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Director) $150,416 $0 $15,724
Dunham Edward (Instrument Manager) $147,540 $0 $14,845
Actor Ann (Deputy Director Of Development) $146,241 $0 $14,805
Massey Philip (Astronomer) $144,157 $0 $15,028
Schleicher David (Astronomer) $142,146 $0 $14,990
Hunter Deidre (Astronomer) $136,749 $0 $14,157
Labruzzo Anne (Deputy Dir. Administration) $91,012 $0 $12,651
Putnam W Lowell (Trustee Sole) $20,349 $0 $9,336

Document Links

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$7,579,056
Expenses
$13,157,576
Net Income
-$5,578,520
Net Assets
$18,862,839
Notable Sources of Revenue Percent of Total Revenue
Contributions $3,697,510
48.8%
Program Services $3,106,288
41.0%
Investment Income $110,959
1.5%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising -$4,822
Sales of Assets $334,039
4.4%
Net Inventory Sales $261,900
3.5%
Other Revenue $73,182
1.0%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,014,541
7.7%
Professional Fundraising Fees $0
Other Salaries and Wages $4,043,932
30.7%
Assets/Debt
Total Assets $48,545,604
Total Liabilities $29,682,765
Net Assets $18,862,839
Compensation
Key Employees and Officers Compensation Related Other
Hall Jeffrey (Director) $147,996 $0 $15,586
Dunham Edward (Instrument Scientist) $144,523 $0 $14,657
Massey Philip (Astronomer) $142,436 $0 $14,604
Schleicher David (Astronomer) $135,252 $0 $14,367
Hunter Deidre (Astronomer) $134,191 $0 $14,496
Levine Stephen (Deputy Dir. Technology/Astronomer) $130,979 $0 $14,098
Labruzzo Anne (Deputy Dir. Administration) $45,512 $0 $6,763
Putnam W Lowell (Trustee Sole) $29,094 $0 $9,986

Document Links

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$8,592,424
Expenses
$10,561,464
Net Income
-$1,969,040
Net Assets
$24,678,797
Notable Sources of Revenue Percent of Total Revenue
Contributions $5,764,553
67.1%
Program Services $1,047,726
12.2%
Investment Income $192,885
2.2%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $216,008
2.5%
Net Inventory Sales $183,126
2.1%
Other Revenue $1,188,126
13.8%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,590,382
15.1%
Professional Fundraising Fees $0
Other Salaries and Wages $2,744,996
26.0%
Assets/Debt
Total Assets $53,149,284
Total Liabilities $28,470,487
Net Assets $24,678,797
Compensation
Key Employees and Officers Compensation Related Other
Edward Dunham (Instrument Scientist) $139,604 $0 $4,160
Kay Mcconagha (Dep Dir Of Ops) $132,303 $0 $0
Jeffrey C Hall (Ceo/Director) $131,528 $0 $6,540
William T Degroff (Telescope Facilities Mgr) $124,464 $0 $2,880
Stephen Levine (Dep Dir Of Tech) $124,262 $0 $2,400
Deidre Hunter (Dep Dir Of Science) $120,188 $0 $1,200
David Schleicher (Dep Dir Of Science) $119,044 $0 $4,200
Phillip Massey (Astronomer) $115,656 $0 $1,200
Ralph Nye (Dir Of Technical Services) $107,717 $0 $0
Lisa Prato (Astronomer) $102,222 $0 $0
Gerard Van Belle (Astronomer) $101,353 $0 $6,250
William Grundy (Astronomer) $99,129 $0 $6,250
Thomas Bida (Instrument Scientist) $98,875 $0 $2,400
W Lowell Putnam (Trustee) $29,107 $0 $7,450

Document Links

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$8,056,313
Expenses
$10,757,145
Net Income
-$2,700,832
Net Assets
$26,747,967
Notable Sources of Revenue Percent of Total Revenue
Contributions $6,079,770
75.5%
Program Services $621,177
7.7%
Investment Income $145,384
1.8%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $383,936
4.8%
Net Inventory Sales $161,512
2.0%
Other Revenue $664,534
8.2%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,244,248
11.6%
Professional Fundraising Fees $0
Other Salaries and Wages $3,273,710
30.4%
Assets/Debt
Total Assets $54,560,319
Total Liabilities $27,812,352
Net Assets $26,747,967
Compensation
Key Employees and Officers Compensation Related Other
Edward Dunham (Instrument Scientist) $137,393 $0 $1,300
Jeffrey C Hall (Ceo/Director) $127,434 $0 $4,275
Charles Wendt (Dep Dir Of Adv) $124,974 $0 $0
Kay Mcconagha (Dep Dir Of Ops) $124,241 $0 $0
William T Degroff (Dct Project Engineer) $120,382 $0 $2,880
Stephen Levine (Dep Dir Of Tech) $119,198 $0 $2,400
David Schleicher (Astronomer) $114,426 $0 $4,200
Phillip Massey (Astronomer) $111,158 $0 $1,200
Deidre Hunter (Dep Dir Of Sci) $109,789 $0 $1,200
William Grundy (Astronomer) $95,009 $0 $6,250
W Lowell Putnam (Trustee) $29,089 $0 $7,450
William L Putnam (Tr Emeritus) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2012

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$7,676,546
Expenses
$9,655,904
Net Income
-$1,979,358
Net Assets
$29,343,229
Notable Sources of Revenue Percent of Total Revenue
Contributions $6,186,895
80.6%
Program Services $606,910
7.9%
Investment Income $113,960
1.5%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $123,532
1.6%
Net Inventory Sales $165,677
2.2%
Other Revenue $479,572
6.2%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,239,312
12.8%
Professional Fundraising Fees $0
Other Salaries and Wages $2,822,992
29.2%
Assets/Debt
Total Assets $54,884,676
Total Liabilities $25,541,447
Net Assets $29,343,229

Document Links

Fiscal Year Ending Dec.
2011

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$7,138,487
Expenses
$7,125,856
Net Income
$12,631
Net Assets
$31,102,807
Notable Sources of Revenue Percent of Total Revenue
Contributions $6,411,760
89.8%
Program Services $520,427
7.3%
Investment Income $100,414
1.4%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$287,197
Net Inventory Sales $121,052
1.7%
Other Revenue $272,031
3.8%
Notable Expenses Percent of Total Expenses
Executive Compensation $1,058,014
14.8%
Professional Fundraising Fees $0
Other Salaries and Wages $2,002,362
28.1%
Assets/Debt
Total Assets $53,848,348
Total Liabilities $22,745,541
Net Assets $31,102,807

Document Links

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

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

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

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

Fiscal Year Ending Dec.
2006

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

Fiscal Year Ending Dec.
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

Fiscal Year Ending Dec.
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

Fiscal Year Ending Dec.
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

Fiscal Year Ending Dec.
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

Fiscal Year Ending Dec.
2001

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

About 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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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.
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