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Wikimedia Foundation

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Wikimedia Foundation

The Wikimedia Foundation, Inc. (WMF) is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California, and registered there as a charitable foundation. The Foundation is most known for being the host of Wikipedia, one of the most visited websites in the world. It also hosts fourteen related open collaboration projects, and supports the development of MediaWiki, the wiki software which underpins them all. The foundation was established in 2003 in St. Petersburg, Florida by Jimmy Wales, as a non-profit way to fund Wikipedia and other wiki projects which had previously been hosted by Bomis, Wales' for-profit company. The Wikimedia Foundation provides the technical and organizational infrastructure to enable members of the public to develop wiki-based content in languages across the world. The foundation does not write or curate any of the content on the projects themselves. Instead, this is done by volunteer editors, such as the Wikipedians. However, it does collaborate with a network of individual volunteers and affiliated organizations, such as Wikimedia chapters, thematic organizations, user groups and other partners. The foundation finances itself mainly through millions of small donations from readers and editors, collected through email campaigns and annual fundraising banners placed on Wikipedia and its sister projects. These are complemented by grants from philanthropic organizations and tech companies, and starting in 2022, by services income from Wikimedia Enterprise. As of 2023, it has employed over 700 staff and contractors, with net assets of $255 million and an endowment which has surpassed $100 million.

Infobox

Abbreviation
WMF
Founded
June 20, 2003; 22 years ago (2003-06-20), St. Petersburg, Florida, U.S.
Founder
Jimmy Wales
Type
501(c)(3), charitable organization
Tax ID no.
mw- body:not(.skin-timeless):not(.skin-minerva) a,body:not(.skin-timeless):not(.skin-minerva) a,body:not(.skin-timeless):not(.skin-minerva) a,body:not(.skin-timeless):not(.skin-minerva) } }EIN 200049703
Focus
Free, open-content, multilingual, wiki-based Internet projects
Location
mw- One Sansome StreetSan Francisco, California, U.S.
Area served
Worldwide(banned in some territories)
Products
Wikipedia, MediaWiki, Wikibooks, Wikidata, Wikifunctions, Wikimedia Commons, Wikinews, Wikiquote, Wikisource, Wikispecies, Wikiversity, Wikivoyage, Wiktionary
Membership
Board-only
CEO
Maryana Iskander
Revenue
$185.4 million (2024) $180.2 million (2023) $167.9 million (2022)
Expenses
$178.6 million (2024) $168.3 million (2023) $145.8 million (2022)
Endowment
$100 million (2021)
Employees
650 (2025)
Volunteers
277,000 (2024)
Website
wikimediafoundation.org foundation.wikimedia.org (Governance)
ASNs
14907, 11820

Tables

· Finances › Financial development
2023/2024
2023/2024
Year
2023/2024
Source
PDF
Revenue
$185,383,511
Expenses
$178,471,109
Asset rise
$16,584,053
Net assets atend of year
$271,555,390
2022/2023
2022/2023
Year
2022/2023
Source
PDF
Revenue
$180,174,103
Expenses
$169,095,381
Asset rise
$15,619,804
Net assets atend of year
$254,971,336
2021/2022
2021/2022
Year
2021/2022
Source
PDF
Revenue
$154,686,521
Expenses
$145,970,915
Asset rise
$8,173,996
Net assets atend of year
$239,351,532
2020/2021
2020/2021
Year
2020/2021
Source
PDF
Revenue
$162,886,686
Expenses
$111,839,819
Asset rise
$50,861,811
Net assets atend of year
$231,177,536
2019/2020
2019/2020
Year
2019/2020
Source
PDF
Revenue
$129,234,327
Expenses
$112,489,397
Asset rise
$14,674,300
Net assets atend of year
$180,315,725
2018/2019
2018/2019
Year
2018/2019
Source
PDF
Revenue
$120,067,266
Expenses
$91,414,010
Asset rise
$30,691,855
Net assets atend of year
$165,641,425
2017/2018
2017/2018
Year
2017/2018
Source
PDF
Revenue
$104,505,783
Expenses
$81,442,265
Asset rise
$21,619,373
Net assets atend of year
$134,949,570
2016/2017
2016/2017
Year
2016/2017
Source
PDF
Revenue
$91,242,418
Expenses
$69,136,758
Asset rise
$21,547,402
Net assets atend of year
$113,330,197
2015/2016
2015/2016
Year
2015/2016
Source
PDF
Revenue
$81,862,724
Expenses
$65,947,465
Asset rise
$13,962,497
Net assets atend of year
$91,782,795
2014/2015
2014/2015
Year
2014/2015
Source
PDF
Revenue
$75,797,223
Expenses
$52,596,782
Asset rise
$24,345,277
Net assets atend of year
$77,820,298
2013/2014
2013/2014
Year
2013/2014
Source
PDF
Revenue
$52,465,287
Expenses
$45,900,745
Asset rise
$8,285,897
Net assets atend of year
$53,475,021
2012/2013
2012/2013
Year
2012/2013
Source
PDF
Revenue
$48,635,408
Expenses
$35,704,796
Asset rise
$10,260,066
Net assets atend of year
$45,189,124
2011/2012
2011/2012
Year
2011/2012
Source
PDF
Revenue
$38,479,665
Expenses
$29,260,652
Asset rise
$10,736,914
Net assets atend of year
$34,929,058
2010/2011
2010/2011
Year
2010/2011
Source
PDF
Revenue
$24,785,092
Expenses
$17,889,794
Asset rise
$9,649,413
Net assets atend of year
$24,192,144
2009/2010
2009/2010
Year
2009/2010
Source
PDF
Revenue
$17,979,312
Expenses
$10,266,793
Asset rise
$6,310,964
Net assets atend of year
$14,542,731
2008/2009
2008/2009
Year
2008/2009
Source
PDF
Revenue
$8,658,006
Expenses
$5,617,236
Asset rise
$3,053,599
Net assets atend of year
$8,231,767
2007/2008
2007/2008
Year
2007/2008
Source
PDF
Revenue
$5,032,981
Expenses
$3,540,724
Asset rise
$3,519,886
Net assets atend of year
$5,178,168
2006/2007
2006/2007
Year
2006/2007
Source
PDF
Revenue
$2,734,909
Expenses
$2,077,843
Asset rise
$654,066
Net assets atend of year
$1,658,282
2005/2006
2005/2006
Year
2005/2006
Source
PDF
Revenue
$1,508,039
Expenses
$791,907
Asset rise
$736,132
Net assets atend of year
$1,004,216
2004/2005
2004/2005
Year
2004/2005
Source
PDF
Revenue
$379,088
Expenses
$177,670
Asset rise
$211,418
Net assets atend of year
$268,084
2003/2004
2003/2004
Year
2003/2004
Source
PDF
Revenue
$80,129
Expenses
$23,463
Asset rise
$56,666
Net assets atend of year
$56,666
Year
Source
Revenue
Expenses
Asset rise
Net assets atend of year
2023/2024
PDF
$185,383,511
$178,471,109
$16,584,053
$271,555,390
2022/2023
PDF
$180,174,103
$169,095,381
$15,619,804
$254,971,336
2021/2022
PDF
$154,686,521
$145,970,915
$8,173,996
$239,351,532
2020/2021
PDF
$162,886,686
$111,839,819
$50,861,811
$231,177,536
2019/2020
PDF
$129,234,327
$112,489,397
$14,674,300
$180,315,725
2018/2019
PDF
$120,067,266
$91,414,010
$30,691,855
$165,641,425
2017/2018
PDF
$104,505,783
$81,442,265
$21,619,373
$134,949,570
2016/2017
PDF
$91,242,418
$69,136,758
$21,547,402
$113,330,197
2015/2016
PDF
$81,862,724
$65,947,465
$13,962,497
$91,782,795
2014/2015
PDF
$75,797,223
$52,596,782
$24,345,277
$77,820,298
2013/2014
PDF
$52,465,287
$45,900,745
$8,285,897
$53,475,021
2012/2013
PDF
$48,635,408
$35,704,796
$10,260,066
$45,189,124
2011/2012
PDF
$38,479,665
$29,260,652
$10,736,914
$34,929,058
2010/2011
PDF
$24,785,092
$17,889,794
$9,649,413
$24,192,144
2009/2010
PDF
$17,979,312
$10,266,793
$6,310,964
$14,542,731
2008/2009
PDF
$8,658,006
$5,617,236
$3,053,599
$8,231,767
2007/2008
PDF
$5,032,981
$3,540,724
$3,519,886
$5,178,168
2006/2007
PDF
$2,734,909
$2,077,843
$654,066
$1,658,282
2005/2006
PDF
$1,508,039
$791,907
$736,132
$1,004,216
2004/2005
PDF
$379,088
$177,670
$211,418
$268,084
2003/2004
PDF
$80,129
$23,463
$56,666
$56,666
· Finances › Grants
9,000
9,000
Total($000s)
9,000
Donor
Sloan Foundation
Years
mw- .mw- .mw- .mw- .mw- .mw-parser-output .cslist li:last-child:after,.mw-parser-output .sslist li:last-child:after,.mw- .mw- .mw- 2008–20132017–2019
5,952
5,952
Total($000s)
5,952
Donor
Stanton Foundation
Years
2009–2012
5,000
5,000
Total($000s)
5,000
Donor
(anonymous)
Years
2014–2018
3,100
3,100
Total($000s)
3,100
Donor
Google
Years
2010, 2019
2,000
2,000
Total($000s)
2,000
Donor
Omidyar Network
Years
2009–2010
1,527
1,527
Total($000s)
1,527
Donor
Rausing, Baldwinvia Arcadia, Charities Aid
Years
20082012–2015
1,300
1,300
Total($000s)
1,300
Donor
Hewlett
Years
2009–2010
500
500
Total($000s)
500
Donor
Sergey Brin & Anne Wojcicki
Years
2010
500
500
Total($000s)
500
Donor
Monarch Fund
Years
2014–2015
Total($000s)
Donor
Years
9,000
Sloan Foundation
mw- cslist li:last-child:after,.mw-parser-output li:last-child:after,.mw- .mw- 2008–20132017–2019
5,952
Stanton Foundation
2009–2012
5,000
(anonymous)
2014–2018
3,100
Google
2010, 2019
2,000
Omidyar Network
2009–2010
1,527
Rausing, Baldwinvia Arcadia, Charities Aid
20082012–2015
1,300
Hewlett
2009–2010
500
Sergey Brin & Anne Wojcicki
2010
500
Monarch Fund
2014–2015

References

  1. "7 reasons you should donate to Wikipedia"
    https://wikimediafoundation.org/news/2025/11/09/7-reasons-you-should-donate-to-wikipedia/
  2. Wales, Jimmy
    https://lists.wikimedia.org/pipermail/wikipedia-l/2003-June/010743.html
  3. Return of organization exempt from income tax 2014: Wikimedia Foundation, Inc
    https://upload.wikimedia.org/wikipedia/foundation/2/27/Form_990_FY_2014-2015_-_Public.pdf
  4. "File:Wikimedia Foundation FY2021–2022 Audit Report.pdf – Wikimedia Foundation Governance Wiki"
    https://upload.wikimedia.org/wikipedia/foundation/2/26/Wikimedia_Foundation_FY2021-2022_Audit_Report.pdf#page=6
  5. "Wikimedia Foundation reaches $100 million Endowment goal as Wikipedia celebrates 20 years of free knowledge"
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  6. Nonprofit Explorer
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  7. The Social Media Revolution: An Economic Encyclopedia of Friending, Following, Texting, and Connecting
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