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Center For Open Science

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 / Professional Societies, Associations (NTEE)

Donations to this organization are tax deductible.

Summary charts: organization finances over time

Revenue
$7.59M (2022)

Expenses
$6.94M (2022)

Total Assets
$12.5M (2022)

Total Liabilities
$8.94M (2022)

Source: Form 990 tax filings from 2013 to 2022

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

No Extracted Financial Data

Form 990 documents are not available for this tax period, but audit documents are available for download.

Document Links

Fiscal Year Ending Dec.
2022

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$7,585,203
Expenses
$6,936,991
Net Income
$648,212
Net Assets
$3,573,644
Notable Sources of Revenue Percent of Total Revenue
Contributions $7,249,473
95.6%
Program Services $335,507
4.4%
Investment Income $223
0.0%
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 $230,000
3.3%
Professional Fundraising Fees $0
Other Salaries and Wages $3,670,859
52.9%
Assets/Debt
Total Assets $12,509,767
Total Liabilities $8,936,123
Net Assets $3,573,644
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Executive Di) $209,500 $0 $20,500
Lisa Shaw (Chief Oper O) $161,757 $0 $19,993
Matthew Frazier (Principal En) $126,664 $0 $6,474
Nicole Pfeiffer (Chief Prod O) $120,356 $0 $20,283
Timothy Errington (Sr Dir Of Re) $119,273 $0 $12,555
Alison Mudditt (Chair) $0 $0 $0
Rebecca Saxe (Vice Chair) $0 $0 $0
Jon Hill (Treasurer) $0 $0 $0
George Banks (Member) $0 $0 $0
Susanna Assunta Sansone (Member) $0 $0 $0
Elaine Chen (Member) $0 $0 $0
Maryrose Franko (Member) $0 $0 $0
Marcia Mcnutt (Member) $0 $0 $0
Elaine Westbrooks (Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2021

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$7,385,775
Expenses
$6,254,465
Net Income
$1,131,310
Net Assets
$2,957,118
Notable Sources of Revenue Percent of Total Revenue
Contributions $6,516,987
88.2%
Program Services $267,990
3.6%
Investment Income $123
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $600,675
8.1%
Notable Expenses Percent of Total Expenses
Executive Compensation $230,000
3.7%
Professional Fundraising Fees $0
Other Salaries and Wages $3,106,014
49.7%
Assets/Debt
Total Assets $9,625,938
Total Liabilities $6,668,820
Net Assets $2,957,118
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Executive Di) $230,000 $0 $0
Nicole Pfeiffer (Chief Prod O) $131,500 $0 $0
Matthew Frazier (Principal En) $118,000 $0 $0
David Litherland (Dir Of Engin) $114,931 $0 $0
Tina Krall (Dir Of Devel) $113,470 $0 $0
Jon Walz (Sr Software) $110,124 $0 $0
Alison Mudditt (Chair) $0 $0 $0
Lara Mangravite (Vice Chair) $0 $0 $0
Jon Hill (Treasurer) $0 $0 $0
George Banks (Member) $0 $0 $0
Arturo Casadevall (Member) $0 $0 $0
Elaine Chen (Member) $0 $0 $0
Maryrose Franko (Member) $0 $0 $0
Marcia Mcnutt (Member) $0 $0 $0
Rebecca Saxe (Member) $0 $0 $0
Elaine Westbrooks (Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2020

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$6,846,966
Expenses
$6,478,699
Net Income
$368,267
Net Assets
$1,764,942
Notable Sources of Revenue Percent of Total Revenue
Contributions $6,491,647
94.8%
Program Services $335,372
4.9%
Investment Income $15,882
0.2%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $4,065
0.1%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $230,000
3.6%
Professional Fundraising Fees $0
Other Salaries and Wages $3,218,495
49.7%
Assets/Debt
Total Assets $6,042,454
Total Liabilities $4,277,512
Net Assets $1,764,942
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Executive Di) $230,000 $0 $0
Tina Krall (Dir Of Devel) $116,500 $0 $0
David Litherland (Dir Of Engin) $114,321 $0 $0
Matthew Frazier (Principal En) $113,500 $0 $0
Nicole Pfeiffer (Chief Prod O) $111,500 $0 $0
Matt Clark (Devops Engin) $103,176 $0 $0
Alison Mudditt (Chair) $0 $0 $0
Lara Mangravite (Vice Chair) $0 $0 $0
Jon Hill (Treasurer) $0 $0 $0
George Banks (Member) $0 $0 $0
Arturo Casadevall (Member) $0 $0 $0
Elaine Chen (Member) $0 $0 $0
Maryrose Franko (Member) $0 $0 $0
Marcia Mcnutt (Member) $0 $0 $0
Rebecca Saxe (Member) $0 $0 $0
Elaine Westbrooks (Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2019

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$5,468,200
Expenses
$5,147,687
Net Income
$320,513
Net Assets
$1,348,894
Notable Sources of Revenue Percent of Total Revenue
Contributions $5,307,565
97.1%
Program Services $76,272
1.4%
Investment Income $39,742
0.7%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $44,621
0.8%
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $230,712
4.5%
Professional Fundraising Fees $0
Other Salaries and Wages $3,121,211
60.6%
Assets/Debt
Total Assets $4,574,968
Total Liabilities $3,226,074
Net Assets $1,348,894
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Executive Di) $230,000 $0 $711
David Litherland (Dir Of Engin) $124,779 $0 $118
Lucy Ofiesh (Coo) $124,242 $0 $682
Nicole Pfeiffer (Director Of) $107,500 $0 $3,209
Matthew Frazier (Devops Engin) $106,222 $0 $3,527
James Davis (Employee) $105,149 $0 $1,281
Maryrose Franko (Chair) $0 $0 $0
Alison Mudditt (Vice Chair) $0 $0 $0
Jon Hill (Treasurer) $0 $0 $0
Marcia Mcnutt (Member) $0 $0 $0
Rebecca Saxe (Member) $0 $0 $0
Arturo Casadevall (Member) $0 $0 $0
George Banks (Member) $0 $0 $0
Lara Mangravite (Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2018

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$5,783,888
Expenses
$5,789,203
Net Income
-$5,315
Net Assets
$1,019,608
Notable Sources of Revenue Percent of Total Revenue
Contributions $5,566,758
96.2%
Program Services $216,256
3.7%
Investment Income $874
0.0%
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 $182,804
3.2%
Professional Fundraising Fees $0
Other Salaries and Wages $3,376,137
58.3%
Assets/Debt
Total Assets $4,108,680
Total Liabilities $3,089,072
Net Assets $1,019,608
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Executive Director, Ex Oficio) $167,708 $0 $6,708
Melanie L Benjamin (Donor And Funder Relations Lead) $121,230 $0 $13,042
Lucy Ofiesh (Coo) $120,873 $0 $17,880
David Litherland (Director Of Engineering) $114,967 $0 $21,876
Michael Haselton (Infrastructure Technical Manager) $112,656 $0 $9,615
Barrett Harber (Do Team/Tech Lead) $110,306 $0 $10,537
Maryrose Franko (Chair) $0 $0 $0
Alan Kraut (Member) $0 $0 $0
Marcia Mcnutt (Member) $0 $0 $0
Alan Leshner (Member) $0 $0 $0
Beth Noveck (Member) $0 $0 $0
Jon Hill (Treasurer) $0 $0 $0
Alison Mudditt (Member) $0 $0 $0
Rebecca Saxe (Member) $0 $0 $0
Archie Holmes Jr (On Behalf Of Provost, Ex Oficio) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2017

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$6,994,472
Expenses
$6,933,207
Net Income
$61,265
Net Assets
$1,040,327
Notable Sources of Revenue Percent of Total Revenue
Contributions $6,821,473
97.5%
Program Services $177,636
2.5%
Investment Income $903
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$5,540
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $303,945
4.4%
Professional Fundraising Fees $0
Other Salaries and Wages $4,074,587
58.8%
Assets/Debt
Total Assets $3,425,593
Total Liabilities $2,385,266
Net Assets $1,040,327
Compensation
Key Employees and Officers Compensation Related Other
Jeffrey Spies (Cto, Ex Officio) $160,816 $0 $13,434
Michael Haselton (Infrastructure Technical Manager) $142,096 $0 $11,728
Matthew Spitzer (Community Manager) $133,768 $0 $15,440
Melanie Benjamin (Donor And Funder Relations Lead) $123,596 $0 $13,355
Brian Nosek (Executive Director, Ex Officio) $123,463 $0 $6,232
Steven Loria (Developer) $106,569 $0 $10,408
Arthur Lupia (Board Chair) $0 $0 $0
Maryrose Franko (Member) $0 $0 $0
Alan Kraut (Vice Chair And Treasurer) $0 $0 $0
Marcia Mcnutt (Member) $0 $0 $0
Alan Leshner (Member) $0 $0 $0
Beth Simone Noveck (Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2016

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$5,890,429
Expenses
$5,847,256
Net Income
$43,173
Net Assets
$938,030
Notable Sources of Revenue Percent of Total Revenue
Contributions $5,878,293
99.8%
Program Services $5,400
0.1%
Investment Income $7,136
0.1%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets -$400
Net Inventory Sales $0
Other Revenue $0
Notable Expenses Percent of Total Expenses
Executive Compensation $382,101
6.5%
Professional Fundraising Fees $0
Other Salaries and Wages $3,312,147
56.6%
Assets/Debt
Total Assets $4,187,856
Total Liabilities $3,249,826
Net Assets $938,030
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Exec. Dir. & Bod Chair Thru 12/20/16) $201,163 $0 $8,120
Jeffrey Spies (Cto & Bod Vice Chair Thru 12/20/16) $161,315 $0 $11,803
Michael Haselton (Infrastructure Technical Manager) $131,335 $0 $10,355
Matthew E Spitzer (Community Manager) $121,293 $0 $12,592
Christopher Wisecarver (Developer) $109,573 $0 $12,041
Melanie L Benjamin (Donor & Funder Relations Lead) $104,177 $0 $10,315
Steven Loria (Developer) $101,556 $0 $8,575
Arthur Lupia (Board Chair Since 12/21/2016) $0 $0 $0
Alan Kraut (Vice Chair Since 12/21/2016) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2015

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$4,863,766
Expenses
$4,557,140
Net Income
$306,626
Net Assets
$882,755
Notable Sources of Revenue Percent of Total Revenue
Contributions $4,467,882
91.9%
Program Services $394,998
8.1%
Investment Income $886
0.0%
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 $362,261
7.9%
Professional Fundraising Fees $0
Other Salaries and Wages $2,398,394
52.6%
Assets/Debt
Total Assets $2,847,942
Total Liabilities $1,965,187
Net Assets $882,755
Compensation
Key Employees and Officers Compensation Related Other
Brian Nosek (Executive Director) $201,552 $0 $0
Jeff Spies (Chief Technology Officer) $160,709 $0 $0
Andrew Updegrove (Board Of Advisers, Member) $0 $0 $0
Josh Greenberg (Board Of Advisers, Member) $0 $0 $0
Alan Kraut (Board Of Advisers, Member) $0 $0 $0
John Ioannidis (Board Of Advisers, Member) $0 $0 $0
Arthur Lupia (Board Of Advisers, Member) $0 $0 $0
Heather Joseph (Board Of Advisers, Member) $0 $0 $0
Marcia Mcnut (Board Of Advisers, Member) $0 $0 $0
Victoria Stodden (Board Of Advisers, Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2014

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$2,230,133
Expenses
$2,034,289
Net Income
$195,844
Net Assets
$767,366
Notable Sources of Revenue Percent of Total Revenue
Contributions $2,064,804
92.6%
Program Services $152,386
6.8%
Investment Income $6,836
0.3%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $6,107
0.3%
Notable Expenses Percent of Total Expenses
Executive Compensation $246,457
12.1%
Professional Fundraising Fees $0
Other Salaries and Wages $1,015,425
49.9%
Assets/Debt
Total Assets $4,020,494
Total Liabilities $3,253,128
Net Assets $767,366
Compensation
Key Employees and Officers Compensation Related Other
Jeff Spies (Chief Technology Officer) $119,755 $0 $6,448
Brian Nosek (Executive Director) $115,629 $0 $4,625
Josh Greenberg (Board Member) $0 $0 $0
Alan Kraut (Board Member) $0 $0 $0
John Ioannidis (Board Member) $0 $0 $0
Victoria Stodden (Board Member) $0 $0 $0
Marcia Mcnutt (Board Member) $0 $0 $0
Arthur Lupia (Board Member) $0 $0 $0
Andy Updegrove (Board Member) $0 $0 $0

Document Links

Fiscal Year Ending Dec.
2013

Extracted Financial Data

Extracted Financial Data from Form 990
Revenue
$1,243,252
Expenses
$671,730
Net Income
$571,522
Net Assets
$571,522
Notable Sources of Revenue Percent of Total Revenue
Contributions $1,242,480
99.9%
Program Services $0
Investment Income $596
0.0%
Bond Proceeds $0
Royalties $0
Rental Property Income $0
Net Fundraising $0
Sales of Assets $0
Net Inventory Sales $0
Other Revenue $176
0.0%
Notable Expenses Percent of Total Expenses
Executive Compensation $154,018
22.9%
Professional Fundraising Fees $0
Other Salaries and Wages $223,252
33.2%
Assets/Debt
Total Assets $2,373,333
Total Liabilities $1,801,811
Net Assets $571,522
Compensation
Key Employees and Officers Compensation Related Other
Jeff Spies (Secretary/Treasurer) $79,864 $0 $1,304
Brian Nosek (President) $74,154 $0 $0
Josh Greenberg (Director) $0 $0 $0
Alan Kraut (Director) $0 $0 $0
John Ioannidis (Director) $0 $0 $0
Victoria Stodden (Director) $0 $0 $0

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.

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.

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