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PYTHON SOFTWARE FOUNDATION

EIN 04-3594598 BEAVERTON, OR

Revenue 2024
$4,086,997
Expenses 2024
$5,765,854

Program services were 85.8% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U41
Classification
1200
Street
9450 SW GEMINI DRIVE ECM 90772

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2024

Mission

The mission of the Python Software Foundation (PSF) is to promote, protect, and advance the open source Python programming language and to support and facilitate the growth of a diverse and international community of Python programmers. The PSF: (1) Produces the core Python distribution including the Python language, its standard libraries and documentation, installers, source code, educational materials, and assorted tools and applications, (2) Establishes PSF licenses conform to the Open Source Definition and ensures the public to freely obtain, use, redistribute, and modify PSF intellectual property, (3) Protects the Python name, and the names, service marks and trademarks, (4) Raises funds to support PSF programs and services, (5) Publicizes, promotes the adoption of, and facilitates the ongoing development of Python-related technology, research, grants, conferences, and educational resources in the public interest.

Activities or mission (Part I)

To promote, protect, and advance the Python programming language, and to support and facilitate the growth of a diverse and international community of Python programmers. See our 2024 Annual Report for more information: https://www.python.org/psf/annual-report/2024/.

  • PyCon US is the largest annual gathering for the community that uses and develops the open-source Python programming language. PyCon US 2024 was offered in a hybrid format for the third time with 2,551 in-person attendees in Pittsburgh, PA and 440 online attendees. A record 1,752 Pythonistas were first-time attendees! The conference included high-quality talks, tutorials, keynotes, and meeting spaces for attendees to learn about our sponsors, discover the job market, explore Python projects and meet fellow Python community members. 198 speakers offered 167 sessions for attendees of all skill levels including tutorials, keynotes, Charlas tracks, and lightning talks. Please see our blog post for more information about PyCon US 2024: https://pycon.blogspot.com/2024/08/.

    Expenses $2,511,830 · Grants $195,124 · Revenue $2,105,145

  • The PSF awarded $637K in grants to projects and events related to the development of Python, Python-related technology, educational programs, and resources. Events include worldwide conferences, PyLadies and Django Girls workshops, education, and training programs related to the establishment and promotion of the free and open source programming language Python. 149 groups or projects in 61 countries received grants from the PSF during 2024. Several worldwide Python Meetups reactivated during the year, bringing the Python Meetup network up to 117 groups covering 37 countries and over 260,000 members. The PSF also awarded $297K in travel grants at PyCon US 2024 (with $72K funded by PyLadies), PyCascades 2024, PyOhio 2024, PyLadiesCon 2024 Equipment Grants.

    Expenses $665,592 · Grants $585,344

  • The PSF provides fiscal sponsorship for Python-focused user groups, events, and projects. These groups hold regular education and networking meetings and/or present regional Python conferences. The PSF and each fiscal sponsoree work together to manage donor contributions wisely and maximize our ability to pursue the PSF's charitable mission. The PSF continued fiscally sponsoring 20 groups including: Bandit, BAPYA (Bay Area Python Groups), Boston Python, ChiPy, Denver Python User Group, Jazzband, North Bay Python, Pallets (Flask), PyOhio, PhillyPUG, PuPPy, PyBeach, PyCascades, PyHawaii, PyLadies PyMNtos, PyPA, PyRVA, San Diego Python, and Twisted.

    Expenses $412,921 · Grants $89,464 · Revenue $435,835

  • The PSF funds programming development efforts to advance and maintain the core Python language, its associated libraries, and significant allied projects central to the Python community. These efforts include the Packaging Work Group, which improves and maintains the Python packaging ecosystem through fundraising and disbursement of raised funds. The Packaging Work Group focuses on efforts such as PyPI, pip, packaging.python.org, setuptools, and cross project efforts. These program initiatives also include funds for trademark and copyright investments. The PSF received several major grants focused on continuing security work during 2024. Amazon Web Services, Inc. provided a third grant for PyPI Security efforts and Linux Foundation renewed the OpenSSF Alpha-Omega Grant, which supports the Security Developer-in-Residence. The PSF received a second year of funding from Meta for the CPython Developer-in-Residence, who focused on CPython improvements and bug tracking and fixing plus many other important tasks. Bloomberg granted funds for a new Deputy CPython Developer-in-Residence and the CPython Steering Council funded a Supporting CPython Developer-in-Residence. The CPython Steering Council also funded the annual CPython Core Developer sprint in Bellevue, Washington in Fall 2024.

    Expenses $1,335,600 · Grants $82,010 · Revenue $1,049,374

  • The Python Software Foundation relies on volunteer efforts to achieve many of its goals. The PSF Board of Directors offers recognition of work which significantly improves the Foundation's fulfillment of its mission and benefits the broader Python community including contributions of code and efforts in community action. The intention of these awards is to demonstrate that service to the Python community does lead to recognition and reward, rather than to provide a direct incentive to contributors.

    Expenses $18,318

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Seth Larson

    Security Developer-in-Residence

    Total calculated
    $238,657
    From this org
    $238,657
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $228,657
    Bonus
    $10,000
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $15,973
    Filer's total
    $254,630

  • Ee Durbin

    Director of Infrastructure

    Total calculated
    $203,105
    From this org
    $203,105
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $185,134
    Bonus
    $17,971
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $15,972
    Filer's total
    $219,077

  • Mike Fiedler

    PyPI Safety and Security Engineer

    Total calculated
    $199,219
    From this org
    $199,219
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $189,219
    Bonus
    $10,000
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $27,745
    Filer's total
    $226,964

  • Loren Crary

    Director of Resource Development

    Total calculated
    $155,120
    From this org
    $155,120
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $140,548
    Bonus
    $14,572
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $14,659
    Filer's total
    $169,779

  • Deborah Nicholson

    Secretary, Executive Director, Director

    Total calculated
    $145,326
    From this org
    $145,326
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $145,326
    Bonus
    $0
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $32,077
    Filer's total
    $177,403

  • Phyllis Dobbs

    Controller

    Total calculated
    $109,570
    From this org
    $109,570
    From related orgs
    $0
    Other
    $0
    Hours/week
    25

    Schedule J breakdown matched by us

    Base
    $99,850
    Bonus
    $9,720
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $47,934
    Filer's total
    $157,504

  • Dawn Wages

    Chair, Director

    Total calculated
    $0
    Hours/week
    5

  • Christopher Neugebauer

    Vice Chair, Director

    Total calculated
    $0
    Hours/week
    5 + 2 related

  • Georgi Ker

    Treasurer, Director

    Total calculated
    $0
    Hours/week
    5

  • Tania Allard

    Director

    Total calculated
    $0
    Hours/week
    2

  • Kwon-Han Bae

    Director

    Total calculated
    $0
    Hours/week
    2

  • Kushal Das

    Director

    Total calculated
    $0
    Hours/week
    2

  • Cheuk Ting Ho

    Director

    Total calculated
    $0
    Hours/week
    2

  • Jannis Leidel

    Director

    Total calculated
    $0
    Hours/week
    2

  • Cristian Maureira-Fredes

    Director

    Total calculated
    $0
    Hours/week
    2

  • Denny Perez

    Director

    Total calculated
    $0
    Hours/week
    2

  • Simon Willison

    Director

    Total calculated
    $0
    Hours/week
    2

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $4,086,997
    Expenses
    $5,765,854
    Contributions
    $2,758,583
    Grants paid
    $951,942
  • 2023
    Revenue
    $4,173,023
    Expenses
    $4,336,478
    Contributions
    $2,902,099
    Grants paid
    $686,912
  • 2022
    Revenue
    $3,856,030
    Expenses
    $3,441,034
    Contributions
    $1,805,386
    Grants paid
    $393,146

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $2,311,080
    Expenses
    $1,682,499
    Assets (EOY)
    $4,902,663

  • 2020 · 990

    Revenue
    $2,176,341
    Expenses
    $1,790,102
    Assets (EOY)
    $4,134,398

  • 2020 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2019 · 990

    Revenue
    $4,464,296
    Expenses
    $3,615,111
    Assets (EOY)
    $4,710,283

  • 2018 · 990

    Revenue
    $3,101,422
    Expenses
    $2,822,126
    Assets (EOY)
    $3,518,885

  • 2017 · 990

    Revenue
    $2,870,521
    Expenses
    $2,475,335
    Assets (EOY)
    $3,289,518

  • 2016 · 990

    Revenue
    $2,432,354
    Expenses
    $2,192,601
    Assets (EOY)
    $2,500,606

  • 2015 · 990

    Revenue
    $2,384,889
    Expenses
    $1,865,971
    Assets (EOY)
    $2,082,438

  • 2014 · 990

    Revenue
    $1,958,053
    Expenses
    $1,773,852
    Assets (EOY)
    $2,017,619

  • 2013 · 990

    Revenue
    $2,175,201
    Expenses
    $1,836,088
    Assets (EOY)
    $1,684,281

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

Where these grants went next →

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 26 October 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.