TY 2024 Form 990

(A) Name and title	(B) Average hours per week (list any hours for related organizations below dotted line)	(C) Position (do not check more than one box, unless person is both an officer and a director/trustee)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)	(F) Estimated amount of other compensation from the organization and related organizations
(1) Seth Larson...................................................................... Security Developer-in-Residence	40 ................. 0			X	X	238,657
(2) Ee Durbin...................................................................... Director of Infrastructure	40 ................. 0			X		203,105
(3) Mike Fiedler...................................................................... PyPI Safety and Security Engineer	40 ................. 0			X		199,219
(4) Loren Crary...................................................................... Director of Resource Development	40 ................. 0			X		155,120
(5) Deborah Nicholson...................................................................... Secretary, Executive Director, Director	40 ................. 0	X	X	X		145,326
(6) Phyllis Dobbs...................................................................... Controller	25 ................. 0			X		109,570
(7) Dawn Wages...................................................................... Chair, Director	5 ................. 0	X	X			0
(8) Christopher Neugebauer...................................................................... Vice Chair, Director	5 ................. 2	X	X			0
(9) Georgi Ker...................................................................... Treasurer, Director	5 ................. 0	X	X			0
(10) Tania Allard...................................................................... Director	2 ................. 0	X				0
(11) Kwon-Han Bae...................................................................... Director	2 ................. 0	X				0
(12) Kushal Das...................................................................... Director	2 ................. 0	X				0
(13) Cheuk Ting Ho...................................................................... Director	2 ................. 0	X				0
(14) Jannis Leidel...................................................................... Director	2 ................. 0	X				0
(15) Cristian Maureira-Fredes...................................................................... Director	2 ................. 0	X				0
(16) Denny Perez...................................................................... Director	2 ................. 0	X				0
(17) Simon Willison...................................................................... Director	2 ................. 0	X				0

(A) Name and business address	(B) Description of services	(C) Compensation
Altitude C Inc 55 Mont-Royal Ouest Bureau 302 Montreal,QuebecH2T 2S5 CA	PyCon US 2024 Audio/Visual Services	439,267
Lukasz Langa Zakopiaiska 199 Poznan 60-467 PL	CPython Senior Developer in Residence	188,491
Levy Premium Foodservice LP 1000 Ft Duquesne Boulevard Pittsburgh,PA15222	PyCon US 2024 Catering Services	942,418
Petr Viktorin, Botanicka 46 Brno 60200 EZ	CPython Deputy Developer in Residence	120,000

2 Total number of independent contractors (including but not limited to those listed above) who received more than $100,000 of compensation from the organization 4

- TIN:

SCHEDULE A
(Form 990)

Department of the Treasury
Internal Revenue Service

Public Charity Status and Public Support

Complete if the organization is a section 501(c)(3) organization or a section 4947(a)(1) nonexempt charitable trust.
right arrow

Attach to Form 990 or Form 990-EZ.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2024

Open to Public
Inspection

Name of the organization

PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Part I

Reason for Public Charity Status (All organizations must complete this part.) See instructions.

The organization is not a private foundation because it is: (For lines 1 through 12, check only one box.)

A church, convention of churches, or association of churches described in section 170(b)(1)(A)(i).

A school described in section 170(b)(1)(A)(ii). (Attach Schedule E (Form 990).)

A hospital or a cooperative hospital service organization described in section 170(b)(1)(A)(iii).

A medical research organization operated in conjunction with a hospital described in section 170(b)(1)(A)(iii). Enter the hospital's name, city, and state:

An organization operated for the benefit of a college or university owned or operated by a governmental unit described in section 170(b)(1)(A)(iv). (Complete Part II.)

A federal, state, or local government or governmental unit described in section 170(b)(1)(A)(v).

An organization that normally receives a substantial part of its support from a governmental unit or from the general public described in section 170(b)(1)(A)(vi). (Complete Part II.)

A community trust described in section 170(b)(1)(A)(vi). (Complete Part II.)

An agricultural research organization described in 170(b)(1)(A)(ix) operated in conjunction with a land-grant college or university or a non-land grant college of agriculture. See instructions. Enter the name, city, and state of the college or university:

An organization that normally receives: (1) more than 33 1/3% of its support from contributions, membership fees, and gross receipts from activities related to its exempt functions—subject to certain exceptions, and (2) no more than 33 1/3% of its support from gross investment income and unrelated business taxable income (less section 511 tax) from businesses acquired by the organization after June 30, 1975. See section 509(a)(2). (Complete Part III.)

An organization organized and operated exclusively to test for public safety. See section 509(a)(4).

An organization organized and operated exclusively for the benefit of, to perform the functions of, or to carry out the purposes of one or more publicly supported organizations described in section 509(a)(1) or section 509(a)(2). See section 509(a)(3). Check the box on lines 12a through 12d that describes the type of supporting organization and complete lines 12e, 12f, and 12g.

Type I. A supporting organization operated, supervised, or controlled by its supported organization(s), typically by giving the supported organization(s) the power to regularly appoint or elect a majority of the directors or trustees of the supporting organization. You must complete Part IV, Sections A and B.

Type II. A supporting organization supervised or controlled in connection with its supported organization(s), by having control or management of the supporting organization vested in the same persons that control or manage the supported organization(s). You must complete Part IV, Sections A and C.

Type III functionally integrated. A supporting organization operated in connection with, and functionally integrated with, its supported organization(s) (see instructions). You must complete Part IV, Sections A, D, and E.

Type III non-functionally integrated. A supporting organization operated in connection with its supported organization(s) that is not functionally integrated. The organization generally must satisfy a distribution requirement and an attentiveness requirement (see instructions). You must complete Part IV, Sections A and D, and Part V.

Check this box if the organization received a written determination from the IRS that it is a Type I, Type II, Type III functionally integrated, or Type III non-functionally integrated supporting organization.

Enter the number of supported organizations ...............................

Provide the following information about the supported organization(s).

(i) Name of supported organization	(ii) EIN	(iv) Is the organization listed in your governing document?		(v) Amount of monetary support (see instructions)	(vi) Amount of other support (see instructions)
(i) Name of supported organization	(ii) EIN	Yes	No	(v) Amount of monetary support (see instructions)	(vi) Amount of other support (see instructions)


Total

For Paperwork Reduction Act Notice, see the Instructions for
Form 990 or 990-EZ.

Cat. No. 11285F

Schedule A (Form 990) 2024

Page 2

Part II

Support Schedule for Organizations Described in Sections 170(b)(1)(A)(iv) and 170(b)(1)(A)(vi)
(Complete only if you checked the box on line 5, 7, or 8 of Part I or if the organization failed to qualify under Part III. If the organization failed to qualify under the tests listed below, please complete Part III.)

Section A. Public Support

Calendar year (or fiscal year beginning in)		(a) 2020	(b) 2021	(c) 2022	(d) 2023	(e) 2024	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grant.") ..	2,187,746	2,093,589	3,476,991	3,160,152	2,758,583	13,677,061
2	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf ....	0	0	0	0	0	0
3	The value of services or facilities furnished by a governmental unit to the organization without charge..	0	0	0	0	0	0
4	Total. Add lines 1 through 3	2,187,746	2,093,589	3,476,991	3,160,152	2,758,583	13,677,061
5	The portion of total contributions by each person (other than a governmental unit or publicly supported organization) included on line 1 that exceeds 2% of the amount shown on line 11, column (f) ..
6	Public support. Subtract line 5 from line 4.						13,677,061

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2020	(b) 2021	(c) 2022	(d) 2023	(e) 2024	(f) Total
7	Amounts from line 4..	2,187,746	2,093,589	3,476,991	3,160,152	2,758,583	13,677,061
8	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources...	21,518	3,295	5,445	138,541	83,523	252,322
9	Net income from unrelated business activities, whether or not the business is regularly carried on..	0	0	0	0	0	0
10	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.)..	171	106	0	0	0	277
11	Total support. Add lines 7 through 10						13,929,660

Gross receipts from related activities, etc. (see instructions) ..................

First 5 years. If the Form 990 is for the organization's first, second, third, fourth, or fifth tax year as a section 501(c)(3) organization, check this box and stop here ........................................ right arrow

Section C. Computation of Public Support Percentage

Public support percentage for 2024 (line 6, column (f) divided by line 11, column (f)) .........

98.187 %

Public support percentage for 2023 Schedule A, Part II, line 14 ...............

71.849 %

16a

33 1/3% support test—2024. If the organization did not check the box on line 13, and line 14 is 33 1/3% or more, check this box
and stop here. The organization qualifies as a publicly supported organization ....................... right arrow

33 1/3% support test—2023. If the organization did not check a box on line 13 or 16a, and line 15 is 33 1/3% or more, check this
box and stop here. The organization qualifies as a publicly supported organization ..................... right arrow

17a

10%-facts-and-circumstances test—2024. If the organization did not check a box on line 13, 16a, or 16b, and line 14 is 10% or more, and if the organization meets the "facts-and-circumstances" test, check this box and stop here. Explain in Part VI how the organization meets the "facts-and-circumstances" test. The organization qualifies as a publicly supported organization ............ right arrow

10%-facts-and-circumstances test—2023. If the organization did not check a box on line 13, 16a, 16b, or 17a, and line 15 is 10% or more, and if the organization meets the "facts-and-circumstances" test, check this box and stop here. Explain in Part VI how the organization meets the "facts-and-circumstances" test. The organization qualifies as a publicly supported organization ............ right arrow

Private foundation. If the organization did not check a box on line 13, 16a, 16b, 17a, or 17b, check this box and see
instructions ..................................................... right arrow

Schedule A (Form 990) 2024

Page 3

Part III

Support Schedule for Organizations Described in Section 509(a)(2)
(Complete only if you checked the box on line 10 of Part I or if the organization failed to qualify under Part II. If the organization fails to qualify under the tests listed below, please complete Part II.)

Section A. Public Support

Calendar year (or fiscal year beginning in)		(a) 2020	(b) 2021	(c) 2022	(d) 2023	(e) 2024	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grants.") .
2	Gross receipts from admissions, merchandise sold or services performed, or facilities furnished in any activity that is related to the organization's tax-exempt purpose
3	Gross receipts from activities that are not an unrelated trade or business under section 513 .....
4	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf...
5	The value of services or facilities furnished by a governmental unit to the organization without charge
6	Total. Add lines 1 through 5
7a	Amounts included on lines 1, 2, and 3 received from disqualified persons
b	Amounts included on lines 2 and 3 received from other than disqualified persons that exceed the greater of $5,000 or 1% of the amount on line 13 for the year.
c	Add lines 7a and 7b..
8	Public support. (Subtract line 7c from line 6.)

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2020	(b) 2021	(c) 2022	(d) 2023	(e) 2024	(f) Total
9	Amounts from line 6...
10a	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources..
b	Unrelated business taxable income (less section 511 taxes) from businesses acquired after June 30, 1975.
c	Add lines 10a and 10b.
11	Net income from unrelated business activities not included on line 10b, whether or not the business is regularly carried on.
12	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.) ..
13	Total support. (Add lines 9, 10c, 11, and 12.)..

First 5 years. If the Form 990 is for the organization's first, second, third, fourth, or fifth tax year as a section 501(c)(3) organization, check this box and stop here................................................. right arrow

Section C. Computation of Public Support Percentage

Public support percentage for 2024 (line 8, column (f) divided by line 13, column (f)) .........

Public support percentage from 2023 Schedule A, Part III, line 15 ...............

Section D. Computation of Investment Income Percentage

Investment income percentage for 2024 (line 10c, column (f) divided by line 13, column (f)) ......

Investment income percentage from 2023 Schedule A, Part III, line 17 .............

19a

33 1/3% support tests-2024. If the organization did not check the box on line 14, and line 15 is more than 33 1/3%, and line 17 is not more than 33 1/3%, check this box and stop here. The organization qualifies as a publicly supported organization ....... right arrow

33 1/3 % support tests—2023. If the organization did not check a box on line 14 or line 19a, and line 16 is more than 33 1/3% and line 18 is not more than 33 1/3%, check this box and stop here. The organization qualifies as a publicly supported organization ..... right arrow

Private foundation. If the organization did not check a box on line 14, 19a, or 19b, check this box and see instructions .... right arrow

Schedule A (Form 990) 2024

Page 4

Part IV

Supporting Organizations

(Complete only if you checked a box on line 12 of Part I. If you checked box 12a, of Part I, complete Sections A and B. If you checked box 12b, of Part I, complete Sections A and C. If you checked box 12c, of Part I, complete Sections A, D, and E. If you checked box12d, of Part I, complete Sections A and D, and complete Part V.)

Section A. All Supporting Organizations

Yes

Are all of the organization’s supported organizations listed by name in the organization’s governing documents?
If "No," describe in Part VI how the supported organizations are designated. If designated by class or purpose,
describe the designation. If historic and continuing relationship, explain.

Did the organization have any supported organization that does not have an IRS determination of status under section 509(a)(1) or (2)? If "Yes," explain in Part VI how the organization determined that the supported organization was described in section 509(a)(1) or (2).

Did the organization have a supported organization described in section 501(c)(4), (5), or (6)? If "Yes," answer lines 3b and 3c below.

Did the organization confirm that each supported organization qualified under section 501(c)(4), (5), or (6) and satisfied the public support tests under section 509(a)(2)? If "Yes," describe in Part VI when and how the organization made the determination.

Did the organization ensure that all support to such organizations was used exclusively for section 170(c)(2)(B) purposes? If "Yes," explain in Part VI what controls the organization put in place to ensure such use.

Was any supported organization not organized in the United States ("foreign supported organization")? If “Yes” and if you checked box 12a or 12b in Part I, answer lines 4b and 4c below.

Did the organization have ultimate control and discretion in deciding whether to make grants to the foreign supported organization? If “Yes,” describe in Part VI how the organization had such control and discretion despite being controlled or supervised by or in connection with its supported organizations.

Did the organization support any foreign supported organization that does not have an IRS determination under sections 501(c)(3) and 509(a)(1) or (2)? If “Yes,” explain in Part VI what controls the organization used to ensure that all support to the foreign supported organization was used exclusively for section 170(c)(2)(B) purposes.

Did the organization add, substitute, or remove any supported organizations during the tax year? If “Yes,” answer lines 5b and 5c below (if applicable). Also, provide detail in Part VI, including (i) the names and EIN numbers of the supported organizations added, substituted, or removed; (ii) the reasons for each such action; (iii) the authority under the organization's organizing document authorizing such action; and (iv) how the action was accomplished (such as by amendment to the organizing document).

Type I or Type II only. Was any added or substituted supported organization part of a class already designated in the organization's organizing document?

Substitutions only. Was the substitution the result of an event beyond the organization's control?

Did the organization provide support (whether in the form of grants or the provision of services or facilities) to anyone other than (i) its supported organizations, (ii) individuals that are part of the charitable class benefited by one or more of its supported organizations, or (iii) other supporting organizations that also support or benefit one or more of the filing organization’s supported organizations? If “Yes,” provide detail in Part VI.

Did the organization provide a grant, loan, compensation, or other similar payment to a substantial contributor (defined in section 4958(c)(3)(C)), a family member of a substantial contributor, or a 35% controlled entity with regard to a substantial contributor? If “Yes,” complete Part I of Schedule L (Form 990) .

Did the organization make a loan to a disqualified person (as defined in section 4958) not described on line 7? If “Yes,” complete Part I of Schedule L (Form 990).

Was the organization controlled directly or indirectly at any time during the tax year by one or more disqualified persons, as defined in section 4946 (other than foundation managers and organizations described in section 509(a)(1) or (2))? If “Yes,” provide detail in Part VI.

Did one or more disqualified persons (as defined on line 9a) hold a controlling interest in any entity in which the supporting organization had an interest? If “Yes,” provide detail in Part VI.

Did a disqualified person (as defined on line 9a) have an ownership interest in, or derive any personal benefit from, assets in which the supporting organization also had an interest? If “Yes,” provide detail in Part VI.

10a

Was the organization subject to the excess business holdings rules of section 4943 because of section 4943(f) (regarding certain Type II supporting organizations, and all Type III non-functionally integrated supporting organizations)? If “Yes,” answer line 10b below.

10a

Did the organization have any excess business holdings in the tax year? (Use Schedule C, Form 4720, to determine whether the organization had excess business holdings).

10b

Schedule A (Form 990) 2024

Page 5

Part IV

Supporting Organizations (continued)

Yes

Has the organization accepted a gift or contribution from any of the following persons?

A person who directly or indirectly controls, either alone or together with persons described on lines 11b and 11c below, the governing body of a supported organization?

11a

A family member of a person described on 11a above?

11b

A 35% controlled entity of a person described on line 11a or 11b above? If “Yes” to 11a, 11b, or 11c, provide detail in Part VI.

11c

Section B. Type I Supporting Organizations

Yes

Did the officers, directors, trustees, or membership of one or more supported organizations have the power to regularly appoint or elect at least a majority of the organization’s directors or trustees at all times during the tax year? If “No,” describe in Part VI how the supported organization(s) effectively operated, supervised, or controlled the organization’s activities. If the organization had more than one supported organization, describe how the powers to appoint and/or remove directors or trustees were allocated among the supported organizations and what conditions or restrictions, if any, applied to such powers during the tax year.

Did the organization operate for the benefit of any supported organization other than the supported organization(s) that operated, supervised, or controlled the supporting organization? If “Yes,” explain in Part VI how providing such benefit carried out the purposes of the supported organization(s) that operated, supervised or controlled the supporting organization.

Section C. Type II Supporting Organizations

Yes

Were a majority of the organization’s directors or trustees during the tax year also a majority of the directors or trustees of each of the organization’s supported organization(s)? If “No,” describe in Part VI how control or management of the supporting organization was vested in the same persons that controlled or managed the supported organization(s).

Section D. All Type III Supporting Organizations

Yes

Did the organization provide to each of its supported organizations, by the last day of the fifth month of the organization’s tax year, (i) a written notice describing the type and amount of support provided during the prior tax year, (ii) a copy of the Form 990 that was most recently filed as of the date of notification, and (iii) copies of the organization’s governing documents in effect on the date of notification, to the extent not previously provided?

Were any of the organization’s officers, directors, or trustees either (i) appointed or elected by the supported organization(s) or (ii) serving on the governing body of a supported organization? If "No," explain in Part VI how the organization maintained a close and continuous working relationship with the supported organization(s).

By reason of the relationship described in line 2 above, did the organization’s supported organizations have a significant voice in the organization’s investment policies and in directing the use of the organization’s income or assets at all times during the tax year? If "Yes," describe in Part VI the role the organization’s supported organizations played in this regard.

Section E. Type III Functionally-Integrated Supporting Organizations

Check the box next to the method that the organization used to satisfy the Integral Part Test during the year (see instructions):

The organization satisfied the Activities Test. Complete line 2 below.

The organization is the parent of each of its supported organizations. Complete line 3 below.

The organization supported a governmental entity. Describe in Part VI how you supported a government entity (see instructions)

Activities Test. Answer lines 2a and 2b below.

Yes

Did substantially all of the organization’s activities during the tax year directly further the exempt purposes of the supported organization(s) to which the organization was responsive? If "Yes," then in Part VI identify those supported organizations and explain how these activities directly furthered their exempt purposes, how the organization was responsive to those supported organizations, and how the organization determined that these activities constituted substantially all of its activities.

Did the activities described on line 2a, above constitute activities that, but for the organization’s involvement, one or more of the organization’s supported organization(s) would have been engaged in? If "Yes," explain in Part VI the reasons for the organization’s position that its supported organization(s) would have engaged in these activities but for the organization’s involvement.

Parent of Supported Organizations. Answer lines 3a and 3b below.

Did the organization have the power to regularly appoint or elect a majority of the officers, directors, or trustees of each of the supported organizations?If "Yes" or "No", provide details in Part VI.

Did the organization exercise a substantial degree of direction over the policies, programs and activities of each of its supported organizations? If "Yes," describe in Part VI. the role played by the organization in this regard.

Schedule A (Form 990) 2024

Page 6

Part V

Type III Non-Functionally Integrated 509(a)(3) Supporting Organizations

Check here if the organization satisfied the Integral Part Test as a qualifying trust on Nov. 20, 1970 (explain in Part VI). See instructions. All other Type III non-functionally integrated supporting organizations must complete Sections A through E.

	Section A - Adjusted Net Income		(A) Prior Year	(B) Current Year (optional)
1	Net short-term capital gain	1
2	Recoveries of prior-year distributions	2
3	Other gross income (see instructions)	3
4	Add lines 1 through 3	4
5	Depreciation and depletion	5
6	Portion of operating expenses paid or incurred for production or collection of gross income or for management, conservation, or maintenance of property held for production of income (see instructions)	6
7	Other expenses (see instructions)	7
8	Adjusted Net Income (subtract lines 5, 6 and 7 from line 4)	8

	Section B - Minimum Asset Amount		(A) Prior Year	(B) Current Year (optional)
1	Aggregate fair market value of all non-exempt-use assets (see instructions for short tax year or assets held for part of year):	1
a	Average monthly value of securities	1a
b	Average monthly cash balances	1b
c	Fair market value of other non-exempt-use assets	1c
d	Total (add lines 1a, 1b, and 1c)	1d
e	Discount claimed for blockage or other factors (explain in detail in Part VI):
2	Acquisition indebtedness applicable to non-exempt use assets	2
3	Subtract line 2 from line 1d	3
4	Cash deemed held for exempt use. Enter 0.015 of line 3 (for greater amount, see instructions).	4
5	Net value of non-exempt-use assets (subtract line 4 from line 3)	5
6	Multiply line 5 by 0.035	6
7	Recoveries of prior-year distributions	7
8	Minimum Asset Amount (add line 7 to line 6)	8

	Section C - Distributable Amount		Current Year
1	Adjusted net income for prior year (from Section A, line 8, Column A)	1
2	Enter 85% of line 1	2
3	Minimum asset amount for prior year (from Section B, line 8, Column A)	3
4	Enter greater of line 2 or line 3	4
5	Income tax imposed in prior year	5
6	Distributable Amount. Subtract line 5 from line 4, unless subject to emergency temporary reduction (see instructions)	6

Check here if the current year is the organization's first as a non-functionally-integrated Type III supporting organization (see instructions)

Schedule A (Form 990) 2024

Page 7

Part V

Type III Non-Functionally Integrated 509(a)(3) Supporting Organizations(continued)

Section D - Distributions		Current Year
1 Amounts paid to supported organizations to accomplish exempt purposes	1
2 Amounts paid to perform activity that directly furthers exempt purposes of supported organizations, in excess of income from activity	2
3 Administrative expenses paid to accomplish exempt purposes of supported organizations	3
4 Amounts paid to acquire exempt-use assets	4
5 Qualified set-aside amounts (prior IRS approval required - provide details in Part VI)	5
6 Other distributions (describe in Part VI). See instructions	6
7Total annual distributions. Add lines 1 through 6.	7
8 Distributions to attentive supported organizations to which the organization is responsive (provide details in Part VI). See instructions	8
9 Distributable amount for 2024 from Section C, line 6	9
10 Line 8 amount divided by Line 9 amount	10

Section E - Distribution Allocations (see instructions)		(i) Excess Distributions	(ii) Underdistributions Pre-2024	(iii) Distributable Amount for 2024
1 Distributable amount for 2024 from Section C, line 6
2 Underdistributions, if any, for years prior to 2024 (reasonable cause required-- explain in Part VI). See instructions.
3 Excess distributions carryover, if any, to 2024:
a From 2019.......
b From 2020.......
c From 2021.......
d From 2022.......
e From 2023.......
fTotal of lines 3a through e
g Applied to underdistributions of prior years
h Applied to 2024 distributable amount
i Carryover from 2019 not applied (see instructions)
j Remainder. Subtract lines 3g, 3h, and 3i from line 3f.
4Distributions for 2024 from Section D, line 7:
$
a Applied to underdistributions of prior years
b Applied to 2024 distributable amount
c Remainder. Subtract lines 4a and 4b from line 4.
5 Remaining underdistributions for years prior to 2024, if any. Subtract lines 3g and 4a from line 2. If the amount is greater than zero, explain in Part VI. See instructions.
6 Remaining underdistributions for 2024. Subtract lines 3h and 4b from line 1. If the amount is greater than zero, explain in Part VI. See instructions.
7 Excess distributions carryover to 2025. Add lines 3j and 4c.
8 Breakdown of line 7:
a Excess from 2020.....
b Excess from 2021.....
c Excess from 2022.....
d Excess from 2023.....
e Excess from 2024.....

Schedule A (Form 990) (2024)

Schedule A (Form 990) 2024

Page 8

Part VI

Supplemental Information. Provide the explanations required by Part II, line 10; Part II, line 17a or 17b; Part III, line 12; Part IV, Section A, lines 1, 2, 3b, 3c, 4b, 4c, 5a, 6, 9a, 9b, 9c, 11a, 11b, and 11c; Part IV, Section B, lines 1 and 2; Part IV, Section C, line 1; Part IV, Section D, lines 2 and 3; Part IV, Section E, lines 1c, 2a, 2b, 3a and 3b; Part V, line 1; Part V, Section B, line 1e; Part V Section D, lines 5, 6, and 8; and Part V, Section E, lines 2, 5, and 6. Also complete this part for any additional information. (See instructions).

Facts And Circumstances Test

Return Reference	Explanation
Schedule A, Part II, Line 10	Python Cookbook Royalties

Schedule A (Form 990) 2024

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

Schedule B
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Schedule of Contributors

Attach to Form 990, 990-EZ, or 990-PF.

Go to www.irs.gov/Form990 for the latest information.

OMB No. 1545-0047

Name of the organization

PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Organization type (check one):

Filers of:

Section:

Form 990 or 990-EZ

501(c)( ) (enter number) organization

4947(a)(1) nonexempt charitable trust not treated as a private foundation

527 political organization

Form 990-PF

501(c)(3) exempt private foundation

4947(a)(1) nonexempt charitable trust treated as a private foundation

501(c)(3) taxable private foundation

Check if your organization is covered by the General Rule or a Special Rule.
Note: Only a section 501(c)(7), (8), or (10) organization can check boxes for both the General Rule and a Special Rule. See instructions.

General Rule

For an organization filing Form 990, 990-EZ, or 990-PF that received, during the year, contributions totaling $5,000 or more (in money or other property) from any one contributor. Complete Parts I and II. See instructions for determining a contributor's total contributions.

Special Rules

For an organization described in section 501(c)(3) filing Form 990 or 990-EZ that met the 33¹/3% support test of the regulations
under sections 509(a)(1) and 170(b)(1)(A)(vi), that checked Schedule A (Form 990 or 990-EZ), Part II, line 13, 16a, or 16b, and that received from any one contributor, during the year, total contributions of the greater of (1) $5,000 or (2) 2% of the amount on (i) Form 990, Part VIII, line 1h, or (ii) Form 990-EZ, line 1. Complete Parts I and II.

For an organization described in section 501(c)(7), (8), or (10) filing Form 990 or 990-EZ that received from any one contributor,
during the year, total contributions of more than $1,000 exclusively for religious, charitable, scientific, literary, or educational purposes, or for the prevention of cruelty to children or animals. Complete Parts I, II, and III.

For an organization described in section 501(c)(7), (8), or (10) filing Form 990 or 990-EZ that received from any one contributor,
during the year, contributions exclusively for religious, charitable, etc., purposes, but no such contributions totaled more than $1,000. If this box is checked, enter here the total contributions that were received during the year for an exclusively religious, charitable, etc., purpose. Don't complete any of the parts unless the General Rule applies to this organization because it received nonexclusively religious, charitable, etc., contributions totaling $5,000 or more during the year ......... Right Arrow

Caution: An organization that isn't covered by the General Rule and/or the Special Rules doesn't file Schedule B (Form 990,
990-EZ, or 990-PF), but it must answer “No” on Part IV, line 2, of its Form 990; or check the box on line H of its Form 990-EZ
or on its Form 990PF, Part I, line 2, to certify that it doesn't meet the filing requirements of Schedule B (Form 990,
990-EZ, or 990-PF).

For Paperwork Reduction Act Notice, see the Instructions
for Form 990, 990-EZ, or 990-PF.

Cat. No. 30613XSchedule B (Form 990) (Rev. 1-2025)

Schedule B (Form 990) (Rev. 1-2025) Page 2

Name of organization PYTHON SOFTWARE FOUNDATION

Part I	Contributors (see instructions). Use duplicate copies of Part I if additional space is needed.
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
RESTRICTED	,	$ RESTRICTED	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
Schedule B (Form 990) (Rev. 1-2025)

Schedule B (Form 990) (Rev. 1-2025)

Page 3

Name of organization PYTHON SOFTWARE FOUNDATION		Employer identification number 04-3594598

Part II	Noncash Property (see instructions). Use duplicate copies of Part II if additional space is needed.
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
(a) No. from Part I	(b) Description of noncash property given	(c) FMV (or estimate) (See instructions)	(d) Date received
		$
Schedule B (Form 990) (Rev. 1-2025)

Schedule B (Form 990) (Rev. 1-2025)

Page 4


Name of organization PYTHON SOFTWARE FOUNDATION			Employer identification number 04-3594598
Part III Exclusively religious, charitable, etc., contributions to organizations described in section 501(c) (7), (8), or (10) that total more than $1,000 for the year from any one contributor. Complete columns (a) through (e) and the following line entry. For organizations completing Part III, enter the total of exclusively religious, charitable, etc., contributions of $1,000 or less for the year. (Enter this information once. See instructions.) $ Use duplicate copies of Part III if additional space is needed.

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

(a)
No. from Part I

(b) Purpose of gift

(d) Description of how gift is held

(e) Transfer of gift
Transferee's name, address, and ZIP 4	Relationship of transferor to transferee

Schedule B (Form 990) (Rev. 1-2025)

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

SCHEDULE D
(Form 990)

Department of the Treasury
Internal Revenue Service

Supplemental Financial Statements

Complete if the organization answered "Yes," on Form 990,
Part IV, line 6, 7, 8, 9, 10, 11a, 11b, 11c, 11d, 11e, 11f, 12a, or 12b.
right arrow

Attach to Form 990.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization

PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Part I

Organizations Maintaining Donor Advised Funds or Other Similar Funds or Accounts. Complete if the organization answered "Yes" on Form 990, Part IV, line 6.

		(a) Donor advised funds	(b) Funds and other accounts
1	Total number at end of year .........
2	Aggregate value of contributions to (during year)
3	Aggregate value of grants from (during year)
4	Aggregate value at end of year ........

Did the organization inform all donors and donor advisors in writing that the assets held in donor advised funds are the organization’s property, subject to the organization’s exclusive legal control? ............

Yes No

Did the organization inform all grantees, donors, and donor advisors in writing that grant funds can be used only for charitable purposes and not for the benefit of the donor or donor advisor, or for any other purpose conferring impermissible private benefit? ...................................

Yes No

Part II

Conservation Easements.
Complete if the organization answered "Yes" on Form 990, Part IV, line 7.

Purpose(s) of conservation easements held by the organization (check all that apply).

Preservation of land for public use (e.g., recreation or education) Preservation of an historically important land area

Protection of natural habitat Preservation of a certified historic structure

Preservation of open space

Complete lines 2a through 2d if the organization held a qualified conservation contribution in the form of a conservation easement on the last day of the tax year.


a	Total number of conservation easements ......................	2a
b	Total acreage restricted by conservation easements ....................	2b
c	Number of conservation easements on a certified historic structure included in (a) .....	2c
d	Number of conservation easements included in (c) acquired after July 25, 2006, and not on a historic structure listed in the National Register ...	2d

Number of conservation easements modified, transferred, released, extinguished, or terminated by the organization during the
tax year right arrow

Number of states where property subject to conservation easement is located right arrow

Does the organization have a written policy regarding the periodic monitoring, inspection, handling of violations, and enforcement of the conservation easements it holds? ............

Yes No

Staff and volunteer hours devoted to monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow

Amount of expenses incurred in monitoring, inspecting, handling of violations, and enforcing conservation easements during the year
right arrow

Does each conservation easement reported on line 2(d) above satisfy the requirements of section 170(h)(4)(B)(i) and section 170(h)(4)(B)(ii)? .............................

Yes No

In Part XIII, describe how the organization reports conservation easements in its revenue and expense statement, and
balance sheet, and include, if applicable, the text of the footnote to the organization’s financial statements that describes
the organization’s accounting for conservation easements.

Part III

Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets.
Complete if the organization answered "Yes" on Form 990, Part IV, line 8.

If the organization elected, as permitted under FASB ASC 958, not to report in its revenue statement and balance sheet works of art, historical treasures, or other similar assets held for public exhibition, education, or research in furtherance of public service, provide, in Part XIII, the text of the footnote to its financial statements that describes these items.

If the organization elected, as permitted under FASB ASC 958, to report in its revenue statement and balance sheet works of art, historical treasures, or other similar assets held for public exhibition, education, or research in furtherance of public service, provide the following amounts relating to these items:

(i)

Revenue included on Form 990, Part VIII, line 1 ......................... right arrow

(ii)

Assets included in Form 990, Part X ............................... right arrow

If the organization received or held works of art, historical treasures, or other similar assets for financial gain, provide the
following amounts required to be reported under FASB ASC 958 relating to these items:

Revenue included on Form 990, Part VIII, line 1 .......................... right arrow

Assets included in Form 990, Part X ............................... right arrow

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 52283D

Schedule D (Form 990) (Rev. 1-2025)

Page 2

Part III

Organizations Maintaining Collections of Art, Historical Treasures, or Other Similar Assets (continued)

Using the organization’s acquisition, accession, and other records, check any of the following that are a significant use of its collection items (check all that apply):

Public exhibition

Loan or exchange programs

Scholarly research

Other

Preservation for future generations

Provide a description of the organization’s collections and explain how they further the organization’s exempt purpose in
Part XIII.

During the year, did the organization solicit or receive donations of art, historical treasures or other similar
assets to be sold to raise funds rather than to be maintained as part of the organization’s collection?...

Yes No

Part IV

Escrow and Custodial Arrangements. Complete if the organization answered "Yes" on Form 990, Part IV, line 9, or reported an amount on Form 990, Part X, line 21.

Is the organization an agent, trustee, custodian or other intermediary for contributions or other assets not
included on Form 990, Part X? ....................................

Yes No


b	If "Yes," explain the arrangement in Part XIII and complete the following table:		Amount
c	Beginning balance .............................	1c
d	Additions during the year ............................	1d
e	Distributions during the year ..........................	1e
f	Ending balance ................................	1f

Did the organization include an amount on Form 990, Part X, line 21, for escrow or custodial account liability? ...

Yes No

If "Yes," explain the arrangement in Part XIII. Check here if the explanation has been provided in Part XIII ....

Part V

Endowment Funds.
Complete if the organization answered "Yes" on Form 990, Part IV, line 10.

		(a) Current year	(b) Prior year	(c) Two years back	(d) Three years back	(e) Four years back

1a	Beginning of year balance ....
b	Contributions ...
c	Net investment earnings, gains, and losses
d	Grants or scholarships ...
e	Other expenditures for facilities and programs ...
f	Administrative expenses ....
g	End of year balance ......

Provide the estimated percentage of the current year end balance (line 1g, column (a)) held as:

Board designated or quasi-endowment right arrow

Permanent endowment right arrow

Term endowment right arrow

The percentages on lines 2a, 2b, and 2c should equal 100%.

Are there endowment funds not in the possession of the organization that are held and administered for the
organization by:

Yes

(i) Unrelated organizations .................

3a(i)

(ii) Related organizations .................

3a(ii)

If "Yes" on 3a(ii), are the related organizations listed as required on Schedule R? .........

Describe in Part XIII the intended uses of the organization's endowment funds.

Part VI

Land, Buildings, and Equipment.
Complete if the organization answered "Yes" on Form 990, Part IV, line 11a. See Form 990, Part X, line 10.

Description of property		(a) Cost or other basis (investment)	(b) Cost or other basis (other)	(c) Accumulated depreciation	(d) Book value

1a	Land .....	0	0
b	Buildings ....	0	0	0
c	Leasehold improvements	0	0	0
d	Equipment ....	73,589	0	73,589
e	Other .....	0	0	0
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..

Schedule D (Form 990) (Rev. 1-2025)

Page 3

Part VII

Investments - Other Securities.
Complete if the organization answered "Yes" on Form 990, Part IV, line 11b. See Form 990, Part X, line 12.

(a) Description of security or category (including name of security)	(b) Book value	(c) Method of valuation: Cost or end-of-year market value
(1) Financial derivatives.........
(2) Closely-held equity interests........
(3)Other
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
Total. (Column (b) must equal Form 990, Part X, col. (B) line 12.)

Part VIII

Investments - Program Related. Complete if the organization answered 'Yes' on Form 990, Part IV, line 11c. See Form 990, Part X, line 13.

(a) Description of investment	(b) Book value	(c) Method of valuation: Cost or end-of-year market value

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 13.)

Part IX

Other Assets.
Complete if the organization answered 'Yes' on Form 990, Part IV, line 11d. See Form 990, Part X, line 15.

(a) Description				(b) Book value

(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 15.)...........

Part X

Other Liabilities.
Complete if the organization answered 'Yes' on Form 990, Part IV, line 11e or 11f. See Form 990, Part X, line 25.

1.(a) Description of liability	(b) Book value
(1) Federal income taxes









Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)
2. Liability for uncertain tax positions. In Part XIII, provide the text of the footnote to the organization's financial statements that reports the organization's liability for uncertain tax positions under FIN 48 (ASC 740). Check here if the text of the footnote has been provided in Part XIII

Schedule D (Form 990) (Rev. 1-2025)

Page 4

Part XI Reconciliation of Revenue per Audited Financial Statements With Revenue per Return. Complete if the organization answered 'Yes' on Form 990, Part IV, line 12a.
1	Total revenue, gains, and other support per audited financial statements .......		1
2	Amounts included on line 1 but not on Form 990, Part VIII, line 12:
a	Net unrealized gains (losses) on investments ....	2a
b	Donated services and use of facilities .........	2b
c	Recoveries of prior year grants ...........	2c
d	Other (Describe in Part XIII.) ...........	2d
e	Add lines 2a through 2d .....................		2e
3	Subtract line 2e from line 1..................		3
4	Amounts included on Form 990, Part VIII, line 12, but not on line 1:
a	Investment expenses not included on Form 990, Part VIII, line 7b .	4a
b	Other (Describe in Part XIII.) ...........	4b
c	Add lines 4a and 4b....................		4c
5	Total revenue. Add lines 3 and 4c. (This must equal Form 990, Part I, line 12.) ......		5

Part XII Reconciliation of Expenses per Audited Financial Statements With Expenses per Return. Complete if the organization answered 'Yes' on Form 990, Part IV, line 12a.
1	Total expenses and losses per audited financial statements ...........		1
2	Amounts included on line 1 but not on Form 990, Part IX, line 25:
a	Donated services and use of facilities .........	2a
b	Prior year adjustments ............	2b
c	Other losses ................	2c
d	Other (Describe in Part XIII.) ...........	2d
e	Add lines 2a through 2d....................		2e
3	Subtract line 2e from line 1...................		3
4	Amounts included on Form 990, Part IX, line 25, but not on line 1:
a	Investment expenses not included on Form 990, Part VIII, line 7b ..	4a
b	Other (Describe in Part XIII.) ...........	4b
c	Add lines 4a and 4b.....................		4c
5	Total expenses. Add lines 3 and 4c. (This must equal Form 990, Part I, line 18.) ......		5

Part XIII

Supplemental Information

Provide the descriptions required for Part II, lines 3, 5, and 9; Part III, lines 1a and 4; Part lV, lines 1b and 2b; Part V, line 4; Part X, line 2; Part XI, lines 2d and 4b; and Part XII, lines 2d and 4b. Also complete this part to provide any additional information.

Return Reference	Explanation

Schedule D (Form 990) (Rev. 1-2025)

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

SCHEDULE F(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Statement of Activities Outside the United States

Complete if the organization answered "Yes" to Form 990, Part IV, line 14b, 15, or 16. Right arrow

Attach to Form 990. Right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization
PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Part I

General Information on Activities Outside the United States. Complete if the organization answered "Yes" on Form 990, Part IV, line 14b.

For grantmakers. Does the organization maintain records to substantiate the amount of its grants and

other assistance, the grantees’ eligibility for the grants or assistance, and the selection criteria used

to award the grants or assistance? . . . . . . . . . . . . . . . . . . . . . . . . .

Yes

For grantmakers. Describe in Part V the organization’s procedures for monitoring the use of its grants and other assistance outside the United States.

Activites per Region. (The following Part I, line 3 table can be duplicated if additional space is needed.)

(a) Region		(b) Number of offices in the region	(c) Number of employees, agents, and independent contractors in the region	(d) Activities conducted in region (by type) (such as, fundraising, program services, investments, grants to recipients located in the region)	(e) If activity listed in (d) is a program service, describe specific type of service(s) in the region	(f) Total expenditures for and investments in the region
	Central America and the Caribbean	0	0	Grantmaking	Python projects and events	9,071
	East Asia and the Pacific	0	0	Grantmaking	Python projects and events	86,348
	Europe (including Iceland and Greenland)	0	0	Grantmaking	Python projects and events	141,105
	Middle East and North Africa	0	0	Grantmaking	Python projects and events	201
	North America (including Canada and Mexico, but not the United States)	0	0	Grantmaking	Python projects and events	13,742
	Russia and Neighboring States	0	0	Grantmaking	Python projects and events	172
	South America	0	0	Grantmaking	Python projects and events	74,465
	South Asia	0	0	Grantmaking	Python projects and events	11,289
	Sub-Saharan Africa	0	0	Grantmaking	Python projects and events	169,788








3a	Sub-total ....
b	Total from continuation sheets to Part I ...
c	Totals (add lines 3a and 3b)	0	0			506,181

For Paperwork Reduction Act Notice, see the Instructions for Form 990.Cat. No. 50082W Schedule F (Form 990) (Rev. 1-2025)

Schedule F (Form 990) (Rev. 1-2025)

Page 2

Part II

Grants and Other Assistance to Organizations or Entities Outside the United States. Complete if the organization answered "Yes" on Form 990, Part IV, line 15, for any recipient who received more than $5,000. Part II can be duplicated if additional space is needed.

(c) Region	(d) Purpose of grant	(e) Amount of cash grant	(f) Manner of cash disbursement	(h) Description of noncash assistance	(i) Method of valuation (book, FMV, appraisal, other)
Central America and the Caribbean	Grant to the PyCon Panama 2024 conference in Panama City, Panama from October 16-18, 2024	8,697	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to the PyCon AU conference in Melbourne, Australia, on November 22-26, 2024	10,399	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to Python Conference APAC Indonesia 2024 in Yogyakarta, Indonesia from October 24th-27, 2024	7,539	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to the PyCon JP conference in Tokyo, Japan from September 27-29, 2024	15,000	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to Kiwi PyCon XIII in Wellington, New Zealand from August 23-25, 2024	12,000	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to PyCon Philippines in Manila, Philippines from February 25-26, 2024	7,762	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to the tenth annual PyConKorea in Suwon, South Korea from October 26-27, 2024	8,072	WIRE TRANSFER	N/A	CASH
East Asia and the Pacific	Grant to the PyConTW conference in Kaohsiung, Taiwan from September 21-22, 2024	12,000	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to the EuroPython Prague conference in Prague, Czech Republic from July 8-14, 2024	15,000	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to the PyConFR conference in Strasbourg, France from October 31-November 3, 2024	8,000	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to PyCon DE & PyData Berlinin Berlin, Germany from April 22-24, 2024	16,500	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to PyCon Italia 2024 in Florence, Italy from May 22-25, 2024	11,000	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to PyConLithuania 2024 in Vilnius, Lithuania from April 2-6, 2024	11,000	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to DjangoCon Europe in Vigo, Spain from June 5-9, 2024	7,500	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to the PyConES conference in Vigo, Spain from October 4-6, 2024	6,000	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to the PyCon Sweden 2024 conference in Stockholm, Sweden from November 14-15, 2024	6,500	WIRE TRANSFER	N/A	CASH
Europe (including Iceland and Greenland)	Grant to the 16th annual PyCon PL conference in Gliwice, Poland from August 29-September 1, 2024	8,500	WIRE TRANSFER	N/A	CASH
North America (including Canada and Mexico, but not the United States)	Grant to the PyCon Latam conference in Mazatlan, Sinaloa, Mexico from September 19-22, 2024	9,810	WIRE TRANSFER	N/A	CASH
South America	Grant to the Python Brasil conference in Rio de Janeiro, Brazil from October 16-21, 2024	15,000	WIRE TRANSFER	N/A	CASH
South America	Grant to the Plone Conference 2024 and Python Cerrado 2024 conference in Brasilia, Brazil from November 25-December 1, 2024	10,050	WIRE TRANSFER	N/A	CASH
South America	Grant to the PyCon Colombia event in Medellin, Colombia from June 7-9, 2024	6,850	WIRE TRANSFER	N/A	CASH
South America	Grant to PyCon Chile in Valparaíso, Chile from November 24-26, 2023 (paid in 2024)	7,970	WIRE TRANSFER	N/A	CASH
South Asia	Grant to the PyCon India conference in Bengaluru, India from September 20-23, 2024	8,599	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to the Creating Python Communities in Preparation for Cameroon TechSummit workshops in Cameroon during 2024	16,000	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to the PUG Ho Coding Bootcamp in Ho, Ghana during 2024	11,875	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to Python Ghana for 37 user group events, 8 PyLadies events, 2 PyData Meetups, 2 general community events, and a 6-week bootcamp in Ghana during 2024	40,550	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to PyCon Nigeria in Lagos, Nigeria from July 10-13, 2024	20,000	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to the Second Annual PyCon Uganda conference in Uganda from October 9-13, 2024	19,200	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to the PyCon Zimbabwe conference in Harare, Zimbabwe from November 1-2, 2024	7,500	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to the SheDevelopers: Python Mastery workshop taking place in Zimbabwe on August 16, 2024	5,250	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to the PyCon Niger conference in the Republic of Niger from September 28-29, 2024	7,500	WIRE TRANSFER	N/A	CASH
Sub-Saharan Africa	Grant to Training 1,500 youth in Python Programming skills within five years in Niger Republic initiative in Niger during 2024	5,535	WIRE TRANSFER	N/A	CASH

2	Enter total number of recipient organizations listed above that are recognized as charities by the foreign country, recognized as tax-exempt by the IRS, or for which the grantee or counsel has provided a section 501(c)(3) equivalency letter .......	0
3	Enter total number of other organizations or entities .......................	32

Schedule F (Form 990) (Rev. 1-2025)

Schedule F (Form 990) (Rev. 1-2025)Page 3

Part III

Grants and Other Assistance to Individuals Outside the United States. Complete if the organization answered "Yes" on Form 990, Part IV, line 16.

Part III can be duplicated if additional space is needed.

(a) Type of grant or assistance		(b) Region	(c) Number of recipients	(d) Amount of cash grant	(e) Manner of cash disbursement	(f) Amount of noncash assistance	(g) Description of noncash assistance	(h) Method of valuation (book, FMV, appraisal, other)

Schedule F (Form 990) (Rev. 1-2025)

Page 4

Part IV

Foreign Forms

Schedule F (Form 990) (Rev. 1-2025)

Page 5

Part V

Supplemental Information
Provide the information required by Part I, line 2 (monitoring of funds); Part I, line 3, column (f) (accounting method; amounts of investments vs. expenditures per region); Part II, line 1 (accounting method); Part III (accounting method); and Part III, column (c) (estimated number of recipients), as applicable. Also complete this part to provide any additional information. See instructions.

ReturnReference	Explanation
Schedule F, Part I, Line 2	Grant applicants apply to the Python Software Foundation for approval to partially sponsor conferences, workshops and other events and projects related to the establishment and promotion of the free and open- source programming language Python, along with related applications and libraries. Content, expected attendance, and financial expectations are included in the grant application. A majority vote of the PSF Board or Grants Working Group Committee authorized by the Board determines whether to approve the grant application and at what amount. Grant applicants are notified by PSF staff whether their grant has been approved and for what amount. Grant recipients invoice the PSF. The PSF Accounting staff ensures that the invoice matches the approved grant and issues payment using the grant recipient's choice of payment method from the options listed on the PSF website; payments are not made in cash. Cash accounts related to the expenditure of grant funds are reconciled by the PSF Accounting staff. Grant recipients are asked to provide post-event reports. The PSF uses a customer resource management system to track the grant life cycle from application to payment.
Schedule F, Part I, Line 3	The PSF awards grants to projects and events related to the development of Python, Python-related technology, educational programs, and resources. Events include worldwide conferences, workshops, education, and training programs related to the establishment and promotion of the free and open source programming language Python

Schedule F (Form 990) (Rev. 1-2025)

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

SCHEDULE G (Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Supplemental Information Regarding
Fundraising or Gaming Activities

Complete if the organization answered "Yes" on Form 990, Part IV, lines 17, 18, or 19, or if the organization entered more than $15,000 on Form 990-EZ, line 6a. right arrow

Attach to Form 990 or Form 990-EZ.
right arrow

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization
PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Part I

Fundraising Activities.Complete if the organization answered "Yes" on Form 990, Part IV, line 17.

Form 990-EZ filers are not required to complete this part.

Indicate whether the organization raised funds through any of the following activities. Check all that apply.

a	Mail solicitations	e	Solicitation of non-government grants
b	Internet and email solicitations	f	Solicitation of government grants
c	Phone solicitations	g	Special fundraising events
d	In-person solicitations

Did the organization have a written or oral agreement with any individual (including officers, directors, trustees

or key employees listed in Form 990, Part VII) or entity in connection with professional fundraising services?

YesNo

If "Yes," list the 10 highest paid individuals or entities (fundraisers) pursuant to agreements under which the fundraiser is
to be compensated at least $5,000 by the organization.

(i) Name and address of individual or entity (fundraiser)	(iii) Did fundraiser have custody or control of contributions?
	Yes	No










Total . . . . . . . . . . . . . . . . . . . .

List all states in which the organization is registered or licensed to solicit contributions or has been notified it is exempt from registration or licensing.

For Paperwork Reduction Act Notice, see the Instructions for Form 990 or 990-EZ.

Cat. No. 50083H

Schedule G (Form 990) (Rev. 1-2025)

Page 2

Part II

Fundraising Events. Complete if the organization answered "Yes" on Form 990, Part IV, line 18, or reported more than $15,000 of fundraising event contributions and gross income on Form 990-EZ, lines 1 and 6b. List events with gross receipts greater than $5,000.

		(a) Event #1 PYLADIES AUCTION 2025 (event type)	(b) Event #2 (event type)	(c) Other events (total number)	(d) Total events (add col. (a) through col. (c))
1	Gross receipts . . . . .	69,610			69,610
2	Less: Contributions . . . .	55,286			55,286
3	Gross income (line 1 minus line 2) . . . . . .	14,324			14,324

4	Cash prizes . . . . .	0		0
5	Noncash prizes . . . .	0		0
6	Rent/facility costs . . . .	0		0
7	Food and beverages . . .	30,985	0	30,985
8	Entertainment . . . .	0	0	0
9	Other direct expenses . . .	20,856		20,856
10	Direct expense summary. Add lines 4 through 9 in column (d) . . . . . . . . . .			51,841
11	Net income summary. Subtract line 10 from line 3, column (d). . . . . . . . . .			-37,517

Part III

Gaming. Complete if the organization answered "Yes" on Form 990, Part IV, line 19, or reported more than $15,000 on Form 990-EZ, line 6a.

		(a) Bingo	(b) Pull tabs/Instant bingo/progressive bingo	(c) Other gaming	(d) Total gaming (add col.(a) through col.(c))
1	Gross revenue . . . . .

2	Cash prizes . . . . .
3	Noncash prizes . . . .
4	Rent/facility costs . . . .
5	Other direct expenses . . .

Volunteer labor . . . .

	Yes %
	No

	Yes %
	No

	Yes %
	No

Direct expense summary. Add lines 2 through 5 in column (d) . . . . . . . . . . right arrow

Net gaming income summary. Subtract line 7 from line 1, column (d). . . . . . . . . right arrow

Enter the state(s) in which the organization conducts gaming activities:

Is the organization licensed to conduct gaming activities in each of these states? . . . . . . . .

YesNo

If "No," explain:

10a

Were any of the organization's gaming licenses revoked, suspended or terminated during the tax year? . . .

YesNo

If "Yes," explain:

Schedule G (Form 990) (Rev. 1-2025)

Page 3

Does the organization conduct gaming activities with nonmembers? . . . . . . . . . . .

YesNo

Is the organization a grantor, beneficiary or trustee of a trust or a member of a partnership or other entity

formed to administer charitable gaming? . . . . . . . . . . . . . . . . .

YesNo

Indicate the percentage of gaming activity conducted in:

The organization's facility . . . . . . . . . . . . . . . . . .

13a

An outside facility . . . . . . . . . . . . . . . . . . . .

13b

Enter the name and address of the person who prepares the organization's gaming/special events books and records:

Name

Address

15a

Does the organization have a contract with a third party from whom the organization receives gaming

revenue? . . . . . . . . . . . . . . . . . . . . . . . .

YesNo

If "Yes," enter the amount of gaming revenue received by the organization right arrow

$ and the

amount of gaming revenue retained by the third party right arrow

$ .

If "Yes," enter name and address of the third party:

Name

Address

Gaming manager information:

Name

Gaming manager compensation right arrow

Description of services provided right arrow

Director/officer Employee Independent contractor

Mandatory distributions:

Is the organization required under state law to make charitable distributions from the gaming proceeds to

retain the state gaming license? . . . . . . . . . . . . . . . . . . .

YesNo

Enter the amount of distributions required under state law distributed to other exempt organizations or spent

in the organization's own exempt activities during the tax year right arrow

Part IV

Supplemental Information. Provide the explanations required by Part I, line 2b, columns (iii) and (v); and Part III, lines 9, 9b, 10b, 15b, 15c, 16, and 17b, as applicable. Also provide any additional information. See instructions.

Return Reference

Explanation

Schedule G, Part II, Line 9

The PSF and PyLadies hosted the Twelfth Annual Charity Auction at PyCon US 2024 in Pittsburgh, PA. The charity auction did not include gaming activities that require the PSF to register for gaming activities in Utah.

Schedule G, Part II, Line 11

The PSF and PyLadies hosted the Twelfth Annual Charity Auction at PyCon US 2024 in Pittsburgh, PA. Auction proceeds went to PyLadies, an international mentorship group focusing on helping more women become active participants and leaders in the Python open-source community. Their mission is to promote, educate, and advance a diverse Python community through outreach, education, conferences, events, and social gatherings. More information about PyLadies can be found here: http://www.pyladies.com/locations/. PyLadies is proud to donate a significant portion of the fundraising proceeds to support PyCon travel grants.

Schedule G (Form 990) (Rev. 1-2025)

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

Note: To capture the full content of this document, please select landscape mode (11" x 8.5") when printing.

Schedule I
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Grants and Other Assistance to Organizations,
Governments and Individuals in the United States

Complete if the organization answered "Yes," on Form 990, Part IV, line 21 or 22.
lBullet

Attach to Form 990.
lBullet

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public
Inspection

Name of the organization
PYTHON SOFTWARE FOUNDATION

Employer identification number
04-3594598

Part I

General Information on Grants and Assistance

Does the organization maintain records to substantiate the amount of the grants or assistance, the grantees' eligibility for the grants or assistance, and
the selection criteria used to award the grants or assistance? ........................

Yes No

Describe in Part IV the organization's procedures for monitoring the use of grant funds in the United States.

Part II

Grants and Other Assistance to Domestic Organizations and Domestic Governments. Complete if the organization answered "Yes" on Form 990, Part IV, line 21, for any recipient

that received more than $5,000. Part II can be duplicated if additional space is needed.

(a) Name and address of organization or government	(b) EIN	(c) IRC section (if applicable)	(d) Amount of cash grant	(e) Amount of non-cash assistance	(f) Method of valuation (book, FMV, appraisal, other)	(g) Description of noncash assistance	(h) Purpose of grant or assistance
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)

Enter total number of section 501(c)(3) and government organizations listed in the line 1 table ................. Bullet Image

Enter total number of other organizations listed in the line 1 table ........................ . Bullet Image

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50055P

Schedule I (Form 990) Rev. 1-2025

Page 2

Part III

Grants and Other Assistance to Domestic Individuals. Complete if the organization answered "Yes" on Form 990, Part IV, line 22.
Part III can be duplicated if additional space is needed.

(a) Type of grant or assistance	(b) Number of recipients	(c) Amount of cash grant	(d) Amount of noncash assistance	(e) Method of valuation (book, FMV, appraisal, other)	(f) Description of noncash assistance

(1) PyCon US 2024 Travel Grants in Pittsburgh, PA	552	297,361	CASH	N/A
(2) CPython Core Dev Sprints 2024 in Bellevue, WA	19	53,088	CASH	N/A
(3) PyCascades 2024 Travel Grants in Seattle, WA	11	11,675	CASH	N/A
(4) PyOhio 2024 Travel Grants in Cleveland, OH	3	1,593	CASH	N/A
(5) PyLadiesCon 2024 Speaker Equipment Grants	4	612	CASH	N/A
(6) North Bay Python 2024 Travel Grant in Petaluma, CA	1	500	CASH	N/A
(7) Grant for ASCII art library for Python	1	8,000	CASH	N/A
(8) Grant for PyMilo ML Streaming development project	1	5,200	Cash	N/A

Part IV

Supplemental Information. Provide the information required in Part I, line 2; Part III, column (b); and any other additional information.

Return Reference

Explanation

Schedule I, Part I, Line 2

Grant applicants apply to the Python Software Foundation for approval to partially sponsor conferences, workshops and other events and projects related to the establishment and promotion of the free and open- source programming language Python, along with related applications and libraries. Content, expected attendance, and financial expectations are included in the grant application. A majority vote of the PSF Board or Grants Working Group Committee authorized by the Board determines whether to approve the grant application and at what amount. Grant applicants are notified by PSF staff whether their grant has been approved and for what amount. Grant recipients invoice the PSF. The PSF Accounting staff ensures that the invoice matches the approved grant and issues payment using the grant recipient's choice of payment method from the options listed on the PSF website; payments are not made in cash. Cash accounts related to the expenditure of grant funds are reconciled by the PSF Accounting staff. Grant recipients are asked to provide post-event reports. The PSF uses a customer resource management system to track the grant life cycle from application to payment

Schedule I, Part III

The PSF awards travel grants to the annual PyCon US conference to allow individuals to attend the conference who could not otherwise be able to attend. Travel grant applicants apply online. Awards are determined by the PyCon US Travel Grant Committee based on financial need, and notifications are sent by email. Once travel grant applicants accept their travel grant award, the PSF ensures that the travel grant award is valid by checking electronically-submitted receipts, confirming that the travel grant recipient attended the conference, and confirming the identity of each applicant. Travel grant recipients select the preferred payment method, and the payment is made by the PSF Accounting staff. North Bay Python, PyCascades, PyLadiesCon, and PyOhio are some of the PSF's fiscal sponsorees. These groups award travel grants to their annual regional Python conferences to allow individuals to attend the conferences who could not otherwise be able to attend. Travel grant applicants apply through the event's website and awards are determined by a volunteer committee based on financial need; notifications are sent by email. Once travel grant applicants accept their travel grant award, the PSF accounting team checks electronically-submitted receipts, confirming that the travel grant recipient attended the conference, and confirming the identity of each applicant. Travel grant recipients select the preferred payment method, and the payment is made by the PSF Accounting staff. The CPython Steering Council funds annual in-person sprints to worldwide Python core developers.

Schedule I (Form 990) Rev. 1-2025

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

Schedule J
(Form 990)
(Rev. January 2025)

Department of the Treasury
Internal Revenue Service

Compensation Information

For certain Officers, Directors, Trustees, Key Employees, and Highest
Compensated Employees
medium right arrow graphic

Complete if the organization answered "Yes" on Form 990, Part IV, line 23.
medium right arrow graphic

Attach to Form 990.
medium right arrow graphic

Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public Inspection

Name of the organization

PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Part I

Questions Regarding Compensation

Yes

Check the appropiate box(es) if the organization provided any of the following to or for a person listed on Form
990, Part VII, Section A, line 1a. Complete Part III to provide any relevant information regarding these items.

First-class or charter travel Housing allowance or residence for personal use

Travel for companions Payments for business use of personal residence

Tax idemnification and gross-up payments Health or social club dues or initiation fees

Discretionary spending account Personal services (e.g., maid, chauffeur, chef)

If any of the boxes on Line 1a are checked, did the organization follow a written policy regarding payment or reimbursement or provision of all of the expenses described above? If "No," complete Part III to explain .....

Did the organization require substantiation prior to reimbursing or allowing expenses incurred by all
directors, trustees, officers, including the CEO/Executive Director, regarding the items checked on Line 1a? ....

Indicate which, if any, of the following the filing organization used to establish the compensation of the
organization's CEO/Executive Director. Check all that apply. Do not check any boxes for methods
used by a related organization to establish compensation of the CEO/Executive Director, but explain in Part III.

Compensation committee Written employment contract

Independent compensation consultant Compensation survey or study

Form 990 of other organizations Approval by the board or compensation committee

During the year, did any person listed on Form 990, Part VII, Section A, line 1a, with respect to the filing organization or a related organization:

Receive a severance payment or change-of-control payment? .............

Participate in, or receive payment from, a supplemental nonqualified retirement plan? .........

Participate in, or receive payment from, an equity-based compensation arrangement? .........

If "Yes" to any of lines 4a-c, list the persons and provide the applicable amounts for each item in Part III.

Only 501(c)(3), 501(c)(4), and 501(c)(29) organizations must complete lines 5-9.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization pay or accrue any
compensation contingent on the revenues of:

The organization? ....................

Any related organization? .......................

If "Yes," on line 5a or 5b, describe in Part III.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization pay or accrue any
compensation contingent on the net earnings of:

The organization? ..................

Any related organization? ......................

If "Yes," on line 6a or 6b, describe in Part III.

For persons listed on Form 990, Part VII, Section A, line 1a, did the organization provide any nonfixed
payments not described in lines 5 and 6? If "Yes," describe in Part III ............

Were any amounts reported on Form 990, Part VII, paid or accured pursuant to a contract that was
subject to the initial contract exception described in Regulations section 53.4958-4(a)(3)? If "Yes," describe
in Part III ..........................

If "Yes" on line 8, did the organization also follow the rebuttable presumption procedure described in Regulations section 53.4958-6(c)? .........................

For Paperwork Reduction Act Notice, see the Instructions for Form 990.

Cat. No. 50053T

Schedule J (Form 990) (Rev. 1-2025)

Page 2

Part II

Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees. Use duplicate copies if additional space is needed.

For each individual whose compensation must be reported on Schedule J, report compensation from the organization on row (i) and from related organizations, described in the
instructions, on row (ii). Do not list any individuals that are not listed on Form 990, Part VII.
Note. The sum of columns (B)(i)-(iii) for each listed individual must equal the total amount of Form 990, Part VII, Section A, line 1a, applicable column (D) and (E) amounts for that individual.

(A) Name and Title		(B) Breakdown of W-2, 1099-MISC compensation, and/or 1099-NEC			(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)	(F) Compensation in column (B) reported as deferred on prior Form 990
(A) Name and Title		(i) Base compensation	(ii) Bonus & incentive compensation	(iii) Other reportable compensation	(C) Retirement and other deferred compensation	(D) Nontaxable benefits	(E) Total of columns (B)(i)-(D)
1Loren Crary Director of Resource Development	(i) (ii)	140,548 ------------- 0	14,572 ------------- 0	0 ------------- 0	0 ------------- 0	14,659 ------------- 0	169,779 ------------- 0	0 ------------- 0
2Phyllis Dobbs Controller	(i) (ii)	99,850 ------------- 0	9,720 ------------- 0	0 ------------- 0	0 ------------- 0	47,934 ------------- 0	157,504 ------------- 0	0 ------------- 0
3Ee Durbin Director of Infrastructure	(i) (ii)	185,134 ------------- 0	17,971 ------------- 0	0 ------------- 0	0 ------------- 0	15,972 ------------- 0	219,077 ------------- 0	0 ------------- 0
4Mike Fiedler PyPI Safety and Security Engineer	(i) (ii)	189,219 ------------- 0	10,000 ------------- 0	0 ------------- 0	0 ------------- 0	27,745 ------------- 0	226,964 ------------- 0	0 ------------- 0
5Seth Larson Security Developer-in-Residence	(i) (ii)	228,657 ------------- 0	10,000 ------------- 0	0 ------------- 0	0 ------------- 0	15,973 ------------- 0	254,630 ------------- 0	0 ------------- 0
6Deborah Nicholson Secretary, Executive Director, Director	(i) (ii)	145,326 ------------- 0	0 ------------- 0	0 ------------- 0	0 ------------- 0	32,077 ------------- 0	177,403 ------------- 0	0 ------------- 0

Schedule J (Form 990) (Rev. 1-2025)

Page 3

Part III

Supplemental Information

Provide the information, explanation, or descriptions required for Part I, lines 1a, 1b, 3, 4a, 4b, 4c, 5a, 5b, 6a, 6b, 7, and 8, and for Part II. Also complete this part for any additional information.

Return Reference

Explanation

Schedule J, Part I, Line 3

Annually, the Board of Directors reviews the performance and compensation of the Executive Director. The Board Chair leads the review conducted with the Executive Committee. No person with a conflict of interest is involved in the performance review and compensation recommendation. Python Software Foundation does not offer severance payments, supplemental nonqualified retirement plans, or equity-based compensation arrangements to any employee. Employee compensation is not contingent upon the net earnings of the organization, does not include non-fixed payments, and does not provide compensation amounts subject to the initial contract exception. The company has a written payment and reimbursement policy and requires substantiation provided prior to reimbursing or allowing expenses that applies to all employees.

Schedule J (Form 990) (Rev. 1-2025)

Additional Data

Software ID:	24021167
Software Version:	v1.00

- TIN:

SCHEDULE O
(Form 990)
(Rev. January 2025)
Department of the Treasury
Internal Revenue Service

Supplemental Information to Form 990 or 990-EZ

Complete to provide information for responses to specific questions on
Form 990 or 990-EZ or to provide any additional information.
Attach to Form 990 or 990-EZ.
Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

Open to Public
Inspection

Name of the organization

PYTHON SOFTWARE FOUNDATION

Employer identification number

04-3594598

Return Reference	Explanation
Form 990, Part III, Line 2	When adding activities, discontinuing activities, and, annually, the Python Software Foundation's management reviews and analyzes the activity against the approved tax-exempt mission. If any activity is deemed not to fit into the tax-exempt mission, it is documented, discussed with the Board of Directors and disclosed on Form 990. For the tax year ended December 31, 2024, all activities fit into the Python Software Foundation's approved tax-exempt mission.
Form 990, Part VI, Section A, Line 2	The Python Software Foundation is focused on promoting and supporting a diverse, international community. Elected Board Directors usually work at organizations that are part of our community, sponsor the Python Software Foundation, and/or volunteer in some other way. More than one Board member may be employed by the same organization. To prevent a single entity gaining a majority of Python Software Foundation board seats, the Python Software Foundation bylaws cap common affiliation, or co-affiliation, of Board members at one quarter (1/4) of the total Board. A common affiliation is defined as all organizations that, directly or indirectly through one or more intermediaries, controls, is controlled by, or is under common control with the other entities declared as affiliations by other members of the Board of Directors.
Form 990, Part VI, Section A, Line 4	Two changes were made to the bylaws of the Python Software Foundation during 2024. The corporation's voting membership approved bylaws changes during the annual general election and went into effect on Thursday, August 1st, 2024. The three bylaws changes were: (A) Merging Contributing and Managing member classes, (B) Simplifying the voter affirmation process by treating past voting activity as intent to continue voting, and (C) Allowing for removal of Fellows by a Board vote in response to Code of Conduct violations, removing the need for a vote of the membership. Effective August 10, 2024, additional changes to Article XI of the corporation's bylaws were made. Acting on legal advice, the full Board voted unanimously to amend its Bylaws to no longer extend an offer to indemnify, advance legal expenses, or insure Members when they are not serving at the request of the Foundation. The amended Bylaws still allow for indemnification of a much smaller set of individuals acting on behalf of the PSF such as Board Members and officers, which is in line with standard nonprofit governance practices and for which we already hold appropriate insurance. The Board of the Python Software Foundation resolved to amend the Bylaws, effective July 23, 2025, to remove a condition that would prevent the Foundation from complying with data privacy laws including those in effect in the European Union, the United Kingdom, and the State of California.
Form 990, Part VI, Section A, Line 6	The Python Software Foundation offers five classes of members during 2024: Basic Members, Supporting Members, Managing Members, Contributing Members, and Fellows. Supporting Members, Managing Members, Contributing Members, and Fellows are eligible for voting privileges. Basic Members are individuals or entities who are part of the Python language community and who have decided to declare their support for Python and agree to the community Code of Conduct; there is no membership fee to become a Basic Member. Supporting Members make an annual donation to the PSF. Managing members dedicate at least five hours per month working to support the Python ecosystem in one of the PSF's working groups. Contributing members dedicate at least five hours per month working on projects that advance the mission of the PSF; the work relates to the creation or maintenance of open source software available to the public at no charge. Fellows are members nominated from the broader community and elevated by a vote of the members for extraordinary efforts and impact upon Python, the community, and the broader Python ecosystem.
Form 990, Part VI, Section A, Line 7a	Supporting Members, Managing Members, Contributing Members, and Fellows are eligible for voting privileges during 2024. Voting members elect Fellows and the Board of Directors. Basic Members have no voting rights.
Form 990, Part VI, Section B, Line 11b	Form 990 and associated schedules are prepared by the PSF Accounting staff. Copies of the draft Form 990 (including required schedules) are distributed to the Finance Committee in electronic form for review and approval. The PSF Accounting staff make updates as needed. Copies of the updated draft Form 990 are then distributed to the Board of Directors in electronic form for review and approval prior to electronic signature.
Form 990, Part VI, Section B, Line 12c	Each Director, Officer, and Key Employee must review and sign the conflict of interest policy and fill out a related questionnaire. The signed documents are kept by the Executive Director. The highest standards of ethics apply for all PSF Members, Officers, and Directors. Possible conflicts of interest are disclosed in writing to all decision-makers prior to any action. Directors, Officers, and Key Employees may recuse themselves from votes to avoid a conflict of interest; board votes must pass by a majority of the disinterested directors. A full explanation of the conflict of interest policy can be found at the Python Software Foundation's website at https://www.python.org/psf/records/board/policies/conflict.
Form 990, Part VI, Section B, Line 15	Annually, the Board of Directors reviews the performance and compensation of the Executive Director. The Board Chair leads the review conducted with the Executive Committee. No person with a conflict of interest is involved in the performance review and compensation recommendation.
Form 990, Part VI, Section C, Line 19	2 changes were made to the Corporation's bylaws in 2024 and 1 in 2025; please see Part VI, Section A, Line 4 of this Form 990 for more details. No other changes were made to the organizing or governing documents of the Python Software Foundation. Organizing and governing documents, as well as financial records, are available upon request and publicly available at python.org/psf/records.
Form 990, Part IX, Line 14	The Python Software Foundation receives complimentary hosting and other information technology services from several providers including Fastly, AWS, and Google. 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 the Linux Foundation's OpenSSF Alpha-Omega Grant supports the work of the Security Developer-in-Residence and the PyPI Security Developer-in-Residence after Georgetown and AWS grants for the latter were completed in 2024. Continuing grants from Meta continued funding the Senior CPython Developer-in-Residence, while ongoing Bloomberg grants funded the Deputy CPython Developer-in-Residence; the CPython Steering Council funded the Supporting CPython Developer-in-Residence
Form 990, Part X, Line 2	The Python Software Foundation (PSF) aims to maintain cash reserves to offset the risk of lower-than-expected attendance at PyCon or fluctuations in individual and corporate giving patterns.

For Paperwork Reduction Act Notice, see the Instructions for Form 990 or 990-EZ.

Cat. No. 51056K

Schedule O (Form 990) (Rev. 1-2025)

Additional Data

Software ID:	24021167
Software Version:	v1.00

1	Briefly describe the organization’s mission or most significant activities: 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/.
2	Check this box
3	Number of voting members of the governing body (Part VI, line 1a) ........	3	12
4	Number of independent voting members of the governing body (Part VI, line 1b) .....	4	11
5	Total number of individuals employed in calendar year 2024 (Part V, line 2a) ......	5	14
6	Total number of volunteers (estimate if necessary) .............	6	1,200
7a	Total unrelated business revenue from Part VIII, column (C), line 12 ........	7a	0
b	Net unrelated business taxable income from Form 990-T, Part I, line 11 .........	7b	0

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	2,902,099	2,758,583
9	Program service revenue (Part VIII, line 2g) .........	1,128,603	1,275,755
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	138,542	83,523
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	3,779	-30,864
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)	4,173,023	4,086,997
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	686,912	951,942
14	Benefits paid to or for members (Part IX, column (A), line 4).....	0	0
15	Salaries, other compensation, employee benefits (Part IX, column (A), lines 5–10)	1,423,396	1,906,895
16a	Professional fundraising fees (Part IX, column (A), line 11e) .....	0	0
b	Total fundraising expenses (Part IX, column (D), line 25) 217,262
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24e)....	2,226,170	2,907,017
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	4,336,478	5,765,854
19	Revenue less expenses. Subtract line 18 from line 12.......	-163,455	-1,678,857
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16).............	5,448,874	4,257,720
21	Total liabilities (Part X, line 26).............	747,099	871,513
22	Net assets or fund balances. Subtract line 21 from line 20.....	4,701,775	3,386,207

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	Signature of officer	Date

	Type or print name and title


4a	(Code: ) (Expenses $ 2,511,830 including grants of $ 195,124 ) (Revenue $ 2,105,145 )
	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/.

4b	(Code: ) (Expenses $ 665,592 including grants of $ 585,344 ) (Revenue $ 0 )
	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.

4c	(Code: ) (Expenses $ 412,921 including grants of $ 89,464 ) (Revenue $ 435,835 )
	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.

	(Code: ) (Expenses $ 1,335,600 including grants of $ 82,010 ) (Revenue $ 1,049,374 )
	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.

	(Code: ) (Expenses $ 18,318 including grants of $ 0 ) (Revenue $ 0 )
	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.

4d	Other program services (Describe in Schedule O.)
	(Expenses $ 1,353,918 including grants of $ 82,010 ) (Revenue $ 1,049,374 )
4e	Total program service expenses4,944,261

1b	Sub-Total..............
c	Total from continuation sheets to Part VII, Section A..
d	Total (add lines 1b and 1c).........	1,050,997	0	0

1a	Federated campaigns..		1a	0
b	Membership dues..		1b	40,678
c	Fundraising events..		1c	0
d	Related organizations		1d	0
e	Government grants (contributions)		1e	0

f	All other contributions, gifts, grants, and similar amounts not included above		1f	2,717,905

g	Noncash contributions included in lines 1a - 1f:$		1g	0

h Total. Add lines 1a-1f.......		2,758,583

		Business Code
2a	PyCon US 2025 Revenue	541511	1,125,137	1,125,137	0	0
b	Fiscal sponsoree revenue	541511	150,618	150,618	0	0
c
d
e
f	All other program service revenue.		0	0	0	0
g	Total. Add lines 2a–2f .....		1,275,755

3 Investment income (including dividends, interest, and othersimilar amounts) ......			83,523	83,523	0	0
4 Income from investment of tax-exempt bond proceeds			0	0	0	0
5 Royalties...........			0	0	0	0
			(i) Real	(ii) Personal
6a	Gross rents	6a
b	Less: rental expenses	6b
c	Rental income or (loss)	6c	0	0
d	Net rental income or (loss).......
			(i) Securities	(ii) Other
7a	Gross amount from sales of assets other than inventory	7a
b	Less: cost or other basis and sales expenses	7b
c	Gain or (loss)	7c	0	0
d	Net gain or (loss).........
8a	Gross income from fundraising events (not including $ 0of contributions reported on line 1c). See Part IV, line 18 ....
			8a	14,324
b	Less: direct expenses ...		8b	51,841
c	Net income or (loss) from fundraising events..			-37,517		0	-37,517
9a	Gross income from gaming activities. See Part IV, line 19 ...
			9a
b	Less: direct expenses ...		9b
c	Net income or (loss) from gaming activities..
10a	Gross sales of inventory, less returns and allowances ..
			10a
b	Less: cost of goods sold ..		10b
c	Net income or (loss) from sales of inventory..

Business Code
11a	CREDIT CARD POINTS REVENUE		541511	6,653	6,653	0	0
b
c
d	All other revenue ....			0	0	0	0
e	Total. Add lines 11a–11d ......			6,653
12	Total revenue. See instructions.....			4,086,997	1,365,931	0	-37,517

1	Grants and other assistance to domestic organizations and domestic governments. See Part IV, line 21 ....	64,964	64,964
2	Grants and other assistance to domestic individuals. See Part IV, line 22 ...........	378,029	378,029
3	Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, lines 15 and 16. .............	508,949	508,949
4	Benefits paid to or for members .......	0	0
5	Compensation of current officers, directors, trustees, and key employees ...........
6	Compensation not included above, to disqualified persons (as defined under section 4958(f)(1)) and persons described in section 4958(c)(3)(B) .........	0	0	0	0
7	Other salaries and wages........	1,529,732	1,043,191	340,316	146,225
8	Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....	46,022	14,676	31,346	0
9	Other employee benefits .......	220,326	91,674	114,207	14,445
10	Payroll taxes ...........	110,815	75,385	24,370	11,060
11	Fees for services (non-employees):
a	Management ......
b	Legal .........	32,707	19,359	13,315	33
c	Accounting ...........	15,141	370	14,667	104
d	Lobbying ...........	0	0	0	0
e	Professional fundraising services. See Part IV, line 17	0			0
f	Investment management fees ......	0	0	0	0
g	Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O)	13,809	9,439	120	4,250
12	Advertising and promotion ....	6,936	1,929	0	5,007
13	Office expenses .......	22,258	13,342	8,382	534
14	Information technology ......	457,060	445,295	2,619	9,146
15	Royalties ..	0	0	0	0
16	Occupancy ...........	15,169	7,556	6,453	1,160
17	Travel ............	135,570	95,991	39,477	102
18	Payments of travel or entertainment expenses for any federal, state, or local public officials .	0	0	0	0
19	Conferences, conventions, and meetings ....	2,107,949	2,102,156	0	5,793
20	Interest ...........	0	0	0	0
21	Payments to affiliates .......	0	0	0	0
22	Depreciation, depletion, and amortization ..	0	0	0	0
23	Insurance ...	19,354	10,908	6,790	1,656
24	Other expenses. Itemize expenses not covered above (List miscellaneous expenses in line 24e. If line 24e amount exceeds 10% of line 25, column (A) amount, list line 24e expenses on Schedule O.)
a	Bad debt expense	10,592	6,153	0	4,439
b	Bank and credit card fees	53,223	37,793	2,122	13,308
c	Community Awards	16,889	16,889	0	0
d	Licenses and Permits	360	213	147	0
e	All other expenses
25	Total functional expenses. Add lines 1 through 24e	5,765,854	4,944,261	604,331	217,262
26	Joint costs. Complete this line only if the organization reported in column (B) joint costs from a combined educational campaign and fundraising solicitation. Check here if following SOP 98-2 (ASC 958-720).

1	Cash–non-interest-bearing ........			683,221	1	706,586
2	Savings and temporary cash investments .........			4,385,121	2	2,963,807
3	Pledges and grants receivable, net ......			0	3	0
4	Accounts receivable, net .............			283,877	4	444,351
5	Loans and other receivables from any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .......
				0	5	0
6	Loans and other receivables from other disqualified persons (as defined under section 4958(f)(1)), and persons described in section 4958(c)(3)(B) ...
				0	6	0
7	Notes and loans receivable, net ...........			983	7	650
8	Inventories for sale or use ............			0	8	0
9	Prepaid expenses and deferred charges ......			95,672	9	142,326
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	73,589
b	Less: accumulated depreciation	10b	73,589		10c	0
11	Investments—publicly traded securities .			0	11	0
12	Investments—other securities. See Part IV, line 11 .....			0	12	0
13	Investments—program-related. See Part IV, line 11 ..			0	13	0
14	Intangible assets ...............			0	14	0
15	Other assets. See Part IV, line 11 ...........			0	15	0
16	Total assets. Add lines 1 through 15 (must equal line 33)...			5,448,874	16	4,257,720

17	Accounts payable and accrued expenses .....	183,564	17	164,020
18	Grants payable ...	10,242	18	86
19	Deferred revenue .........	553,293	19	707,407
20	Tax-exempt bond liabilities .........	0	20	0
21	Escrow or custodial account liability. Complete Part IV of Schedule D	0	21	0
22	Loans and other payables to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .........
		0	22	0
23	Secured mortgages and notes payable to unrelated third parties ..	0	23	0
24	Unsecured notes and loans payable to unrelated third parties ..	0	24	0
25	Other liabilities (including federal income tax, payables to related third parties, and other liabilities not included on lines 17 - 24). Complete Part X of Schedule D	0	25
26	Total liabilities. Add lines 17 through 25..	747,099	26	871,513

	Organizations that follow FASB ASC 958, check here and complete lines 27, 28, 32, and 33.
27	Net assets without donor restrictions ..........	2,505,492	27	1,684,261
28	Net assets with donor restrictions ...........	2,196,283	28	1,701,946
	Organizations that do not follow FASB ASC 958, check here and complete lines 29 through 33.
29	Capital stock or trust principal, or current funds .....		29
30	Paid-in or capital surplus, or land, building or equipment fund ...		30
31	Retained earnings, endowment, accumulated income, or other funds		31
32	Total net assets or fund balances ...........	4,701,775	32	3,386,207
33	Total liabilities and net assets/fund balances ........	5,448,874	33	4,257,720

1	Was the organization a U.S. transferor of property to a foreign corporation during the tax year? If "Yes," the organization may be required to file Form 926, Return by a U.S. Transferor of Property to a Foreign Corporation (see Instructions for Form 926). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
2	Did the organization have an interest in a foreign trust during the tax year? If "Yes," the organization may be required to separately file Form 3520, Annual Return to Report Transactions with Foreign Trusts and Receipt of Certain Foreign Gifts, and/or Form 3520-A, Annual Information Return of Foreign Trust With a U.S. Owner (see Instructions for Forms 3520 and 3520-A; don't file with Form 990). . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
3	Did the organization have an ownership interest in a foreign corporation during the tax year? If "Yes," the organization may be required to file Form 5471, Information Return of U.S. Persons with Respect to Certain Foreign Corporations. (see Instructions for Form 5471). . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
4	Was the organization a direct or indirect shareholder of a passive foreign investment company or a qualified electing fund during the tax year? If “Yes,” the organization may be required to file Form 8621, Information Return by a Shareholder of a Passive Foreign Investment Company or Qualified Electing Fund. (see Instructions for Form 8621) .	Yes	No
5	Did the organization have an ownership interest in a foreign partnership during the tax year? If "Yes," the organization may be required to file Form 8865, Return of U.S. Persons with Respect to Certain Foreign Partnerships (see Instructions for Form 8865). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No
6	Did the organization have any operations in or related to any boycotting countries during the tax year? If "Yes," the organization may be required to separately file Form 5713, International Boycott Report (see Instructions for Form 5713; don't file with Form 990).. . . . . . . . . . . . . . . . . . . . . . . . . . . .	Yes	No