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)
(1) Dr Robert M Hauser...................................................................... CEO	40.00 ................. 0.00	X	X	341,000	35,275
(2) Michelle McDonald...................................................................... Dir of Library	40.00 ................. 0.00		X	257,373	44,445
(3) John Wolfe...................................................................... Financial Offic	40.00 ................. 0.00		X	251,750	48,992
(4) Dr Patrick Spero...................................................................... CEO	40.00 ................. 0.00		X	231,916	29,014
(5) Linda Jacobs...................................................................... Development Direct	40.00 ................. 0.00			192,610	29,601
(6) Gary David...................................................................... Asso Dir of Collec	40.00 ................. 0.00			139,050	37,238
(7) Mary Grace Wahl...................................................................... Assoc Dir of Colle	40.00 ................. 0.00			113,810	46,183
(8) Bayard Miller...................................................................... Assoc Dir of Digit	40.00 ................. 0.00			120,120	27,041
(9) Linda Musumeci...................................................................... Dir of Grants & Fe	40.00 ................. 0.00			122,802	10,416
(10) Dr Joanna Aizenberg...................................................................... Councilor	1.00 ................. 0.00	X		0	0
(11) Dr Julia H Gaisser...................................................................... Councilor	1.00 ................. 0.00	X		0	0
(12) Dr Jacqueline K Barton...................................................................... V.P./Council	1.00 ................. 0.00	X	X	0	0
(13) Dr Dusa McDuff...................................................................... Councilor	1.00 ................. 0.00	X		0	0
(14) Dr Clyde F Barker...................................................................... Councilor	1.00 ................. 0.00	X		0	0
(15) Dr Linda K Kerber...................................................................... Councilor	1.00 ................. 0.00	X		0	0
(16) Dr Vijay Kumar...................................................................... Councilor	1.00 ................. 0.00	X		0	0
(17) Dr Jianguo Liu...................................................................... Councilor	1.00 ................. 0.00	X		0	0

(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)
(18) Dr Anne Case........................................................................ Councilor	1.00 .......................0.00	X
(19) Dr David Skorton........................................................................ Councilor/Secy	1.00 .......................0.00	X	X
(20) Dr Richard E Lenski........................................................................ Councilor	1.00 .......................0.00	X
(21) John S Reed........................................................................ Councilor	1.00 .......................0.00	X
(22) Linda Greenhouse........................................................................ Councilor	1.00 .......................0.00	X
(23) Dr Nina Jablonski........................................................................ V.P./Council	1.00 .......................0.00	X	X
(24) Sir Mark Thompson........................................................................ Councilor	1.00 .......................0.00	X
(25) Dr Kathleen Hall Jamieson........................................................................ Councilor	1.00 .......................0.00	X
(26) Dr Andrew Delbanco........................................................................ Councilor	1.00 .......................0.00	X
(27) Dr Paul W Kroll........................................................................ Councilor	1.00 .......................0.00	X
(28) Dr Leslie C Aiello........................................................................ Curator/Council	1.00 .......................0.00	X	X
(29) Mr Richard B Worley........................................................................ Councilor	1.00 .......................0.00	X
(30) Dr Jonathan R Cole........................................................................ Councilor	1.00 .......................0.00	X
(31) Dr Ronald M Fairman........................................................................ Councilor	1.00 .......................0.00	X
(32) Margaret H Marshall........................................................................ Councilor	1.00 .......................0.00	X
(33) Dr Marna C Whittington........................................................................ Councilor/Treas	1.00 .......................0.00	X	X
(34) Dr Alan S Blinder........................................................................ Councilor	1.00 .......................0.00	X
(35) Robert James Miller........................................................................ Councilor	1.00 .......................0.00	X
(36) Dr Harriet Zuckerman........................................................................ Councilor	1.00 .......................0.00	X
(37) Dr David Hollinger........................................................................ Councilor	1.00 .......................0.00	X
(38) Dr Keith S Thomson........................................................................ Curator/Council	1.00 .......................0.00	X	X
(39) Dr Roger S Bagnall........................................................................ Pres/Councilor	1.00 .......................0.00	X	X
(40) Dr William H Hooke........................................................................ Councilor	1.00 .......................0.00	X
(41) Dr Caroline W Bynum........................................................................ Councilor/V.P.	1.00 .......................0.00	X	X
(42) Dr Douglas S Massey........................................................................ Councilor	1.00 .......................0.00	X
(43) Dr John C Van Horne........................................................................ Councilor	1.00 .......................0.00	X

- 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

AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

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.") ..	2,998,084	4,871,791	6,463,558	3,852,845	3,265,366	21,451,644
2	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf ....						0
3	The value of services or facilities furnished by a governmental unit to the organization without charge..	712,000	712,000	712,000	712,000	712,000	3,560,000
4	Total. Add lines 1 through 3	3,710,084	5,583,791	7,175,558	4,564,845	3,977,366	25,011,644
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) ..						3,751,736
6	Public support. Subtract line 5 from line 4.						21,259,908

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..	3,710,084	5,583,791	7,175,558	4,564,845	3,977,366	25,011,644
8	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources...	7,603,095	5,653,663	5,365,955	6,477,829	6,602,039	31,702,581
9	Net income from unrelated business activities, whether or not the business is regularly carried on..						0
10	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.)..	15,909	22,899	26,148	34,471	48,288	147,715
11	Total support. Add lines 7 through 10						56,861,940

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

400,034

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)) .........

37.390 %

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

36.010 %

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 (Form 990) 2024

Additional Data

Software ID:	24020490
Software Version:	2024v5.2

- 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

AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

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 AMERICAN PHILOSOPHICAL SOCIETY

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 AMERICAN PHILOSOPHICAL SOCIETY		Employer identification number 23-1353269

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 AMERICAN PHILOSOPHICAL SOCIETY			Employer identification number 23-1353269
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:	24020490
Software Version:	2024v5.2

- 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

AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

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 ....	269,632,908	244,901,541	270,577,742	250,868,244	230,216,578
b	Contributions ...	328,371	1,473,714	3,237,451	1,596,579	1,634,040
c	Net investment earnings, gains, and losses	24,266,475	28,509,845	-23,388,012	24,304,973	27,715,713
d	Grants or scholarships ...
e	Other expenditures for facilities and programs ...	5,197,388	4,421,860	4,758,247	5,216,053	7,772,174
f	Administrative expenses ....	991,538	830,332	767,393	976,001	925,913
g	End of year balance ......	288,038,828	269,632,908	244,901,541	270,577,742	250,868,244

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

Board designated or quasi-endowment right arrow

11.200 %

Permanent endowment right arrow

88.800 %

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 .....
b	Buildings ....	32,356,622	20,014,076	12,342,546
c	Leasehold improvements
d	Equipment ....
e	Other .....
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..				12,342,546

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.)	78,798,337

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
Annuity Obligations	2,648,030
Pension Benefit Liability	3,544,994
Postretirement Benefit Liability	1,326,156






Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)	7,519,180
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	15,391,383
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	712,000
c	Recoveries of prior year grants ...........	2c
d	Other (Describe in Part XIII.) ...........	2d	11,281,010
e	Add lines 2a through 2d .....................			2e	11,993,010
3	Subtract line 2e from line 1..................			3	3,398,373
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	16,993,431
c	Add lines 4a and 4b....................			4c	16,993,431
5	Total revenue. Add lines 3 and 4c. (This must equal Form 990, Part I, line 12.) ......			5	20,391,804

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	15,240,389
2	Amounts included on line 1 but not on Form 990, Part IX, line 25:
a	Donated services and use of facilities .........	2a	712,000
b	Prior year adjustments ............	2b
c	Other losses ................	2c
d	Other (Describe in Part XIII.) ...........	2d
e	Add lines 2a through 2d....................			2e	712,000
3	Subtract line 2e from line 1...................			3	14,528,389
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	994,886
b	Other (Describe in Part XIII.) ...........	4b	48,363
c	Add lines 4a and 4b.....................			4c	1,043,249
5	Total expenses. Add lines 3 and 4c. (This must equal Form 990, Part I, line 18.) ......			5	15,571,638

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
Part III, Line 1a: If organization elected under SFAS 116 to not report are, historical treasures, o	As permitted by the provisions of FASB ASC 958, Not-for-Profit Entities, the Society does not capitalize donated works of art, books, or manuscripts or recognize them as revenue or gains.Collection items acquired either through purchase or donation are not capitalized. Purchases of collection items are recorded as decreases in unrestricted net assets if purchased with unrestricted assets and as decreases in temporarily restricted or permanently restricted net assets if purchased with donor-restricted assets. Contributions of collection items are not recognized in the Statement of Activities. Proceeds from deaccessions or insurance recoveries are reflected on the Statement of Activities based on the absence or existence and nature of donor-imposed restrictions.The Society's accounts do not include values of Philosophical Hall, built between 1785 and 1789, a national historic landmark, and its collection of books, manuscripts and works of art.
Part III, Line 4: Description of organization's collections and how it furthers its purpose.	The Society's offices and exhibition galleries are located in Philosophical Hall, a national historic landmark. Its collection of books, manuscripts and works of art support research, discovery and public education through public exhibitions and the Society's research library.
Part IV, Line 1b: Why is organization an agent, trustee, custodian or other intermediary for contrib	The Society is the beneficiary under a number of trusts administered by two banks. The assets of the trusts are not included in the Statement of Financial Position since the Society does not exercise any control over those funds and certain conditions must be met annually to receive the income. The income from the trusts for 2024 and 2023 was $213,750 and $225,000, respectively.
Part V, Line 4: Intended uses of the endowment fund.	Under the Society's endowment spending policy, 4.5% of the average market value at the mid-point of the previous three years is appropriated for current operations. The investment policy utilized by the Society attempts to provide a predictable stream of funding to programs supported by its endowment while seeking to maintain the purchasing power of the endowment assets (donor-restricted funds that the Society must hold in perpetuity or for a donor-specified period as well as council designated funds). Endowments have been established for the following activities: administration, research, publications, meetings, library, Franklin Hall, and any other activity of the Society.
Part X : FIN48 Footnote	The Society is a publicly supported tax exempt organization in accordance with the provisions of Internal Revenue Code Section 501(c)(3). Accordingly, no provision for federal income taxes has been made. The Society is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress.
Part XI, Line 2d: Other revenue amounts included in F/S but not included on form 990	Investment return designated for opera. $12173635 Less DLAR $-892626 Rounding $1
Part XI, Line 4b: Other revenue amounts included on 990 but not included in F/S	Realized gains (losses) $10325168 Dividends & Interest on securities $6298294 Contributions to Endowment Fund $320719 Charitable gift annuity interest income $49250
Part XII, Line 4b: Other revenue amounts included on 990 but not included in F/S	Change in value of annuity agreements $48363

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

Additional Data

Software ID:	24020490
Software Version:	2024v5.2

- 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
AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

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
	EUROPE	0	0	GRANTS TO RECIPIENTS IN REGION	GRANT PAYMENTS	74,000
	NORTH AMERICA	0	0	GRANTS TO RECIPIENTS IN REGION	GRANT PAYMENTS	40,700
	EAST ASIA	0	0	GRANTS TO RECIPIENTS IN REGION	GRANT PAYMENTS	12,000
	SOUTH AMERICA	0	0	GRANTS TO RECIPIENTS IN REGION	GRANT PAYMENTS	3,000
	Middle East and North Africa	0	0	GRANTS TO RECIPIENTS IN REGION	GRANT PAYMENTS	18,000












3a	Sub-total ....					147,700
b	Total from continuation sheets to Part I ...
c	Totals (add lines 3a and 3b)					147,700

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.

1 (a) Name of organization		(b) IRS code section and EIN (if applicable)	(c) Region	(d) Purpose of grant	(e) Amount of cash grant	(f) Manner of cash disbursement	(g) Amount of noncash assistance	(h) Description of noncash assistance	(i) Method of valuation (book, FMV, appraisal, other)

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 .......
3	Enter total number of other organizations or entities .......................

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.

	(b) Region	(c) Number of recipients	(d) Amount of cash grant	(e) Manner of cash disbursement	(h) Method of valuation (book, FMV, appraisal, other)
Franklin Research Grant	East Asia	1	6,000	Wire	FMV
Franklin Research Grant	Europe	4	21,000	Wire	FMV
Franklin Research Grant	Europe	5	28,000	ACH	FMV
Franklin Research Grant	Middle East	1	6,000	ACH	FMV
Franklin Research Grant	Middle East	3	12,000	Wire	FMV
Franklin Research Grant	North America	1	6,000	check	FMV
Library Fellowship grant	Europe	1	3,000	ACH	FMV
Library Fellowship grant	North America	2	6,000	Wire	FMV
Library Fellowship grant	North America	2	8,000	Check	FMV
Library Fellowship grant	South America	1	3,000	wire	FMV
Library Fellowship grants	East Asia	1	6,000	ACH	FMV
Library Fellowship grants	Europe	1	3,000	check	FMV
Library Fellowship grants	Europe	4	19,000	Wire	FMV
Phillips Native American Grant	North America	3	8,900	Wire	FMV
Phillips Native American Grant	North America	4	11,800	Check	FMV

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
Part I, Line 2 - Grantmakers Explanation For Monitoring Use of Funds Outside US	The American Philosophical Society has certain committees that areresponsible for the selection of individuals receiving disbursementsin furtherance of the exempt programs. An application for a grant mustbe submitted either electronically or on typewritten forms provided for that purpose.Awards are made by the Society's Committees in accordancewith the following principles: 1. Grants are intended to assist investigators by providing forcosts of research work, such as the collection of scientific andliterary materials; preparation of photographs, microfilms, and otherrecords; purchases of supplies; necessary travel; and other incidentalexpenses of research. 2. Grants are not made toward the payment of salaries of members ofthe staff of an educational or scientific institution. Grants may notinclude institutional overhead. When a grant is made to a member of aninstitution to assist him or her in research of scholarly writings, it isexpected that the institution will cooperate in facilitating thework. 3. Grants are not made for: (a) salaries, fellowships, scholarships,or other projects involving personal expenses over long periods; (b)subsidies for publication; (c) usual or permanent equipment for theinstitution involved (but may be made for special apparatus needed inthe proposed research); (d) travel to meetings; (e) expense of grantee's family. 4. Support of a long-continuing project is not undertaken, except inits initial stage. 5. No recipient of a grant shall thereby become an employee of theSociety.The written agreement with the grantee's sets forth the specificobjectives of the grant and requires each recipient to file a writtenreport with the Society.In the formal notification sent to all recipients of grants there is arequest that credit be given to the Society in the publication of worksupported by such grants and that a copy of each publication be sent to the Society. To this has been added another statement that the Committee on Publications would appreciate an opportunity to consider publication of a manuscript, but there is no obligation that such a paper be published by the Society.

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

Additional Data

Software ID:	24020490
Software Version:	2024v5.2

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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
AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number
23-1353269

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) The Papers of Benjamin Franklin Yale Univ Library 1603 A Yale St New Haven,CT06520	06-0646973		15,000	0	FMV		Franklin Papers Project

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) Franklin Research Grant	108	582,115	FMV
(2) Lewis and Clark Fund Grants	99	450,839	FMV
(3) Phillips Native American	21	56,100	FMV
(4) Daland Fellowships	3	81,886	FMV
(5) Library Resident Research Grant	44	381,101	FMV
(6) John Hope Franklin Fellowship	1	28,805	FMV
(7) APS Press Fellowship	1	10,500	FMV
(7)

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

Grantmaker's Description of How Grants are Used

The American Philosophical Society has certain committees that areresponsible for the selection of individuals receiving disbursementsin furtherance of the exempt programs. An application for a grant mustbe submitted either electronically or on typewritten forms provided for that purpose.Awards are made by the Society's Committees in accordancewith the following principles: 1. Grants are intended to assist investigators by providing forcosts of research work, such as the collection of scientific andliterary materials; preparation of photographs, microfilms, and otherrecords; purchases of supplies; necessary travel; and other incidentalexpenses of research. 2. Grants are not made toward the payment of salaries of members ofthe staff of an educational or scientific institution. Grants may notinclude institutional overhead. When a grant is made to a member of aninstitution to assist him or her in research of scholarly writings, it is expected that the institution will cooperate in facilitating thework. 3. Grants are not made for: (a) salaries, fellowships, scholarships,or other projects involving personal expenses over long periods; (b)subsidies for publication; (c) usual or permanent equipment for theinstitution involved (but may be made for special apparatus needed inthe proposed research); (d) travel to meetings; (e) expense of grantee's family. 4. Support of a long-continuing project is not undertaken, except inits initial stage. 5. No recipient of a grant shall thereby become an employee of theSociety.The written agreement with each grantee sets forth the specificobjectives of the grant and requires each recipient to file a writtenreport with the Society.In the formal notification sent to all recipients of grants there is arequest that credit be given to the Society in the publication of worksupported by such grants and that a copy of each publication be sent to the Society. To this has been added another statementthat the Committee on Publications would appreciate an opportunity toconsider publication of a manuscript, but there is no obligation that such a paper be published by the Society.

Schedule I (Form 990) Rev. 1-2025

Additional Data

Software ID:	24020490
Software Version:	2024v5.2

- 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

AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

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? ....

Yes

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)
1Dr Patrick Spero CEO	(i) (ii)	231,916 -------------	-------------	-------------	15,000 -------------	14,014 -------------	260,930 -------------	-------------
2Dr Robert M Hauser CEO	(i) (ii)	341,000 -------------	-------------	-------------	27,280 -------------	7,995 -------------	376,275 -------------	-------------
3Gary David Asso Dir of Collec	(i) (ii)	139,050 -------------	-------------	-------------	11,124 -------------	26,114 -------------	176,288 -------------	-------------
4John Wolfe Financial Offic	(i) (ii)	251,750 -------------	-------------	-------------	5,793 -------------	43,199 -------------	300,742 -------------	-------------
5Linda Jacobs Development Direct	(i) (ii)	192,610 -------------	-------------	-------------	15,408 -------------	14,193 -------------	222,211 -------------	-------------
6Mary Grace Wahl Assoc Dir of Colle	(i) (ii)	113,810 -------------	-------------	-------------	9,440 -------------	36,743 -------------	159,993 -------------	-------------
7Michelle McDonald Dir of Library	(i) (ii)	257,373 -------------	-------------	-------------	16,500 -------------	27,945 -------------	301,818 -------------	-------------

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
Part I, Line 1a: Relevant information in regards to selections on 1a.	The Society paid $4,014 for social club memberships for the Orgnization's CEO.
Part I, Line 1b: Reason for not following policy regarding payment provisions for expenses	The Society has no written policy regarding compensation of this nature.The Society's Executive Officer and President decided together to provide this compensation to the Officer.

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

Additional Data

Software ID:	24020490
Software Version:	2024v5.2

- TIN:

SCHEDULE M
(Form 990)

Department of the Treasury

Internal Revenue Service

Noncash Contributions

Complete if the organizations answered "Yes" on Form 990, Part IV, lines 29 or 30.
Right pointing arrow large image

Attach to Form 990.
Right pointing arrow large image

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

OMB No. 1545-0047

2024

Open to Public Inspection

Name of the organization

AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

Part I

Types of Property

	(a) Check if applicable	(b) Number of contributions or items contributed	(c) Noncash contribution amounts reported on Form 990, Part VIII, line 1g	(d) Method of determining noncash contribution amounts
1 Art—Works of art ....
2 Art—Historical treasures .	X	3
3 Art—Fractional interests ..
4 Books and publications ..	X
5 Clothing and household goods .......
6 Cars and other vehicles ..
7 Boats and planes ....
8 Intellectual property ...
9 Securities—Publicly traded .	X	5	279,571	Market Value
10 Securities—Closely held stock .
11 Securities—Partnership, LLC, or trust interests ....
12 Securities—Miscellaneous ..
13 Qualified conservation contribution—Historic structures .....
14 Qualified conservation contribution—Other ...
15 Real estate—Residential .
16 Real estate—Commercial ..
17 Real estate—Other ...
18 Collectibles .....
19 Food inventory ...
20 Drugs and medical supplies .
21 Taxidermy ......
22 Historical artifacts ....
23 Scientific specimens ..
24 Archeological artifacts ...
25 Other ( )
26 Other ( )
27 Other ( )
28 Other ( )

Number of Forms 8283 received by the organization during the tax year for contributions
for which the organization completed Form 8283, Part IV, Donee Acknowledgement

Yes

30a

During the year, did the organization receive by contribution any property reported in Part I, lines 1 through 28, that it must hold for at least three years from the date of the initial contribution, and which isn't required to be used for exempt purposes for the entire holding period? ...................

30a

If "Yes," describe the arrangement in Part II.

Does the organization have a gift acceptance policy that requires the review of any nonstandard contributions?

32a

Does the organization hire or use third parties or related organizations to solicit, process, or sell noncash

contributions? ..........................

32a

If "Yes," describe in Part II.

If the organization didn't report an amount in column (c) for a type of property for which column (a) is checked,

describe in Part II.

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

Cat. No. 51227J

Schedule M (Form 990) (2024)

Page 2

Part IISupplemental Information. Provide the information required by Part I, lines 30b, 32b, and 33, and whether the organization is reporting in Part I, column (b), the number of contributions, the number of items received, or a combination of both. Also complete this part for any additional information.

Return Reference	Explanation
Part I, Line 33, Revenues Not Reported	Contributions of collection items are not recognized in the Statement of Activities because the society does not capitalize its collections as allowed by generally accepted accounting principles under SFAS 116 (ASC 958-360-250).

Schedule M (Form 990) (2024)

Additional Data

Software ID:	24020490
Software Version:	2024v5.2

- 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

AMERICAN PHILOSOPHICAL SOCIETY

Employer identification number

23-1353269

Return Reference	Explanation
Form 990, Part VI, Section A, Line 4	On advice of counsel, we have removed from the Laws the detailed procedures for the classes, the election of members, and the lengthy description of our committees and their working procedures. The version we are submitting for approval is thus significantly shorter than its predecessor. These materials will in the future be part of a new document called Regulations, which will be adopted by vote of Council and will be more readily amended as operational details evolve. The Laws, however, will remain subject to revision only by a vote of the Members (as state law provides). Apart from this major alteration, the significant areas of change in the Laws are as follows:1. Language from Pennsylvania law has been inserted into a considerable number of articles to conform to the current state of statutes. This language is mandatory and not subject to change by us. The most important such new language is in Chapter II, Article 9, Reserved Powers of Members. 2. Pennsylvania requires that committees be either governance committees, strictly defined as capable of acting on behalf of the Society, or advisory committees, of which the actions require ratification by Council. We have kept in the Laws only one governance committee, the Executive Committee of Council. All others are advisory and will be described in the Regulations. They can in fact take decisions within policies approved by the Council, for example in awarding research grants or fellowships, in selecting candidates for the annual elections, and in accepting acquisitions for the Museum. But they cannot establish policies without approval by Council. This is an important change in how we have operated, but we believe it can be implemented without disruption. 3. Just as we changed the Librarians official title recently to Director of the Library & Museum (in large part to recognize the union of those two departments), we recommend using the title Chief Executive officer to make the nature of the position more recognizable in the world at large, and retitling the Financial Officer as the Director of Finance and Administration/Chief Financial Officer for similar reasons and to make the scope of this position clearer.4. We have recommended allowing International Members to nominate persons for membership. Such nominations remain subject to the decision of the Class Committees whether to have names go forward onto the first or second ballot, and International Members remain unable to vote in elections. 5. On advice of counsel, the provision for continued service on Council of past presidents has been eliminated (Chapter VI, Article 1). 6. The Curator of Art and Material Culture is now to be elected by the Members like other officers. The Curator of the Jefferson Garden will remain a presidential appointment but not serve on the Council. We have provided in the Regulations for a new Committee on Compensation, something we have lacked until now, with an annual duty of recommending the compensation for the Chief Executive Officer and a periodic one of reviewing the entire compensation structure of the Societys staff.
Form 990, Part VI, Section A, Line 6	THE SOCIETY HAS MEMBERS. THE MEMBERS DO NOT RECEIVE A SHARE OF THE SOCIETY'S PROFITS AND THERE ARE NO MEMBER DUES.
Form 990, Part VI, Section A, Line 7a	THE MEMBERS ELECT THE MEMBERS OF THE GOVERNING BODY (COUNCIL) AND APPROVE SPECIFIC DECISIONS OF COUNCIL AS THE LAWS DIRECT.
Form 990, Part VI, Section A, Line 7b	ALL COUNCIL DECISIONS RELATING TO THE CHARTER, THE LAWS, AND THE COMPOSITION AND SIZE OF THE MEMBERSHIP, ARE SUBJECT TO THE MEMBERSHIP'S APPROVAL.
Form 990, Part VI, Section B, Line 11b	1. A COPY OF FORM 990 IS PROVIDED TO THE COMMITTEE ON AUDIT AND TO EVERY VOTING MEMBER OF THE COUNCIL.2. THE TREASURER AND THE CHAIR OF THE COMMITTEE ON AUDIT ARE RESPONSIBLE FOR SOLICITING COMMENTS FROM THE COMMITTEE ON AUDIT AND RECEIVING COMMENTS FROM THE COUNCIL WITHIN A FIXED REASONABLE PERIOD OF TIME BEFORE THE EXPECTED (INITIAL OR EXTENDED) FILING DUE DATE. THE TREASURER AND CHAIR OF THE COMMITTEE ON AUDIT REPORT ANY CONCERNS TO THE CHIEF EXECUTIVE AND ADMINISTRATIVE OFFICERS FOR REVIEW. THE CHIEF EXECUTIVE OFFICER RESPONDS TO THE TREASURER AND THE CHAIR OF THE COMMITTEE ON AUDIT IN A REASONABLE MANNER. THE CHIEF EXECUTIVE OFFICER AFTER DUE DELIBERATION SIGNS THE RETURN.
Form 990, Part VI, Section B, Line 12c	COVERED PERSONS ARE SOLICITED ANNUALLY, ASKING THESE INDIVIDUALS TO REPORT ANY POSSIBLE POTENTIAL CONFLICT.
Form 990, Part VI, Section B, Line 15a	PRESIDENT AND TREASURER APPROVE THE COMPENSATION OF THE CHIEF EXECUTIVE OFFICER WITH THE ADVICE OF THE COMPENSATION COMMITTEE OF COUNCIL AND WITHIN BUDGETARY PARAMETERS APPROVED BY COUNCIL.
Form 990, Part VI, Section B, Line 15b	COMPARABILITY DATA ARE UTILIZED AND ALL SALARIES ARE DETERMINED AT THE DISCRETION OF THE CHIEF EXECUTIVE OFFICER.
Form 990, Part VI, Section C, Line 19	THE SOCIETY'S YEARBOOK FOR 2024 GIVES A COMPLETE ACCOUNT OF THE SOCIETY'S ACTIVITIES. IT ALSO INCLUDES A COPY OF ITS LAWS AND POLICIES. A COPY WILL BE FURNISHED UPON REQUEST. FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST.
Form 990, Part IX, Line 24e	: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Chg in Val of Annuity Agree.: Column (A) - Total = $48363; Column (B) - Program Services = $0; Column (C) - Management & General = $48363; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Committee expenses: Column (A) - Total = $88354; Column (B) - Program Services = $55016; Column (C) - Management & General = $33338; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Curatorial exhibit expenses: Column (A) - Total = $206783; Column (B) - Program Services = $206783; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Curatorial Project Personnel: Column (A) - Total = $3565; Column (B) - Program Services = $3565; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Development expenses: Column (A) - Total = $122036; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $122036
Form 990, Part IX, Line 24e	Education & Collections exp.: Column (A) - Total = $88231; Column (B) - Program Services = $88231; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Equip. rental and maintenance: Column (A) - Total = $255101; Column (B) - Program Services = $49744; Column (C) - Management & General = $195153; Column (D) - Fundraising = $10204
Form 990, Part IX, Line 24e	Grant database: Column (A) - Total = $53302; Column (B) - Program Services = $53302; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	HRA Maintenance: Column (A) - Total = $4705; Column (B) - Program Services = $0; Column (C) - Management & General = $4705; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Library books & manuscripts: Column (A) - Total = $121718; Column (B) - Program Services = $121718; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Membership expenses: Column (A) - Total = $34635; Column (B) - Program Services = $34635; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Miscellaneous - Curatorial: Column (A) - Total = $12853; Column (B) - Program Services = $12853; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	MISCELLANEOUS RESEARCH: Column (A) - Total = $2010; Column (B) - Program Services = $2010; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Pension Benefit Costs: Column (A) - Total = $250857; Column (B) - Program Services = $179175; Column (C) - Management & General = $48783; Column (D) - Fundraising = $22899
Form 990, Part IX, Line 24e	Permanent collections: Column (A) - Total = $11031; Column (B) - Program Services = $11031; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Prizes & Honoraria: Column (A) - Total = $140536; Column (B) - Program Services = $140536; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Professional services: Column (A) - Total = $120322; Column (B) - Program Services = $0; Column (C) - Management & General = $120322; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Relocation costs: Column (A) - Total = $43609; Column (B) - Program Services = $0; Column (C) - Management & General = $43609; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Special Purposes Curatorial: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Temporary help: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Travel & Public relations: Column (A) - Total = $88994; Column (B) - Program Services = $0; Column (C) - Management & General = $88994; Column (D) - Fundraising = $0
Form 990, Part IX, Line 24e	Unemployment compensation: Column (A) - Total = $7717; Column (B) - Program Services = $0; Column (C) - Management & General = $7717; Column (D) - Fundraising = $0
Form 990, Part XI, Line 9	annuity interest = -$49250
Form 990, Part XI, Line 9	Change in pension liability = $504374
Form 990, Part XI, Line 9	change in post retirement benefit liability = $121338
Form 990, Part XI, Line 9	change in post retirement = -$0
Form 990, Part XI, Line 9	Change in Postretirement benefit liability = $0
Form 990, Part XI, Line 9	Realized gain attributable to annuity obligation = -$205428
Form 990, Part XI, Line 9	rounding = -$0
Form 990, Part XI, Line 9	Unrealized gain attributable to annunity obligation = -$45379
Form 990, Part XI, Line 9	Unrealized loss attributable to annuity obligation = $0

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:	24020490
Software Version:	2024v5.2

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	3,852,845	3,265,366
9	Program service revenue (Part VIII, line 2g) .........	39,458	150,943
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	9,353,380	16,906,951
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	73,259	68,544
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)	13,318,942	20,391,804
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	1,712,648	1,754,046
14	Benefits paid to or for members (Part IX, column (A), line 4).....		0
15	Salaries, other compensation, employee benefits (Part IX, column (A), lines 5–10)	5,629,629	6,565,971
16a	Professional fundraising fees (Part IX, column (A), line 11e) .....		0
b	Total fundraising expenses (Part IX, column (D), line 25) 795,660
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24e)....	6,871,039	7,251,621
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	14,213,316	15,571,638
19	Revenue less expenses. Subtract line 18 from line 12.......	-894,374	4,820,166
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16).............	292,035,358	310,248,157
21	Total liabilities (Part X, line 26).............	8,222,905	7,715,566
22	Net assets or fund balances. Subtract line 21 from line 20.....	283,812,453	302,532,591

Sign Here

	Signature of officer	Date

	Type or print name and title


4a	(Code: ) (Expenses $ 11,302,992 including grants of $ 1,754,046 ) (Revenue $ 150,943 )
	The Society's printed Yearbook for 2024 gives a complete account of the Society's activities. A copy will be furnished upon request. Details concerning contributions and research grants are on hand and are available for inspection at the Society's office.

4b	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )












4c	(Code: ) (Expenses $ including grants of $ ) (Revenue $ )












4d	Other program services (Describe in Schedule O.)
	(Expenses $ including grants of $ ) (Revenue $ )
4e	Total program service expenses11,302,992

1b	Sub-Total..............
c	Total from continuation sheets to Part VII, Section A..
d	Total (add lines 1b and 1c).........	1,770,431	308,205

(A) Name and business address	(B) Description of services	(C) Compensation





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 0

1	Briefly describe the organization’s mission or most significant activities: The American Philosophical Society, the oldest learned society in the United States, was founded in 1743 by Benjamin Franklin for the purpose of "promoting useful knowledge." In the 21st century the Society sustains this mission with various programs described further within.
2	Check this box
3	Number of voting members of the governing body (Part VI, line 1a) ........	3	31
4	Number of independent voting members of the governing body (Part VI, line 1b) .....	4	31
5	Total number of individuals employed in calendar year 2024 (Part V, line 2a) ......	5	83
6	Total number of volunteers (estimate if necessary) .............	6	174
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

1a	Federated campaigns..		1a
b	Membership dues..		1b
c	Fundraising events..		1c
d	Related organizations		1d
e	Government grants (contributions)		1e	33,879

f	All other contributions, gifts, grants, and similar amounts not included above		1f	3,231,487

g	Noncash contributions included in lines 1a - 1f:$		1g	279,571

h Total. Add lines 1a-1f.......		3,265,366

		Business Code
2a	Publications sales	511130	150,943	150,943
b
c
d
e
f	All other program service revenue.
g	Total. Add lines 2a–2f .....		150,943

3 Investment income (including dividends, interest, and othersimilar amounts) ......			6,581,784			6,581,784
4 Income from investment of tax-exempt bond proceeds			0
5 Royalties...........			0
			(i) Real	(ii) Personal
6a	Gross rents	6a	20,255
b	Less: rental expenses	6b
c	Rental income or (loss)	6c	20,255
d	Net rental income or (loss).......			20,255			20,255
			(i) Securities	(ii) Other
7a	Gross amount from sales of assets other than inventory	7a	27,987,002
b	Less: cost or other basis and sales expenses	7b	17,661,835
c	Gain or (loss)	7c	10,325,167
d	Net gain or (loss).........			10,325,167			10,325,167
8a	Gross income from fundraising events (not including $ of contributions reported on line 1c). See Part IV, line 18 ....
			8a
b	Less: direct expenses ...		8b
c	Net income or (loss) from fundraising events..			0
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..			0
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..			0

Business Code
11a	Digitization Royalties		900099	2,581			2,581
b	Exhibition Sales		459210	30,923			30,923
c	Misc. Inc. Photo Duplicat		900099	13,664			13,664
d	All other revenue ....			1,121			1,121
e	Total. Add lines 11a–11d ......			48,289
12	Total revenue. See instructions.....			20,391,804	150,943		16,975,495

1	Grants and other assistance to domestic organizations and domestic governments. See Part IV, line 21 ....	15,000	15,000
2	Grants and other assistance to domestic individuals. See Part IV, line 22 ...........	1,591,346	1,591,346
3	Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, lines 15 and 16. .............	147,700	147,700
4	Benefits paid to or for members .......	0
5	Compensation of current officers, directors, trustees, and key employees ...........	1,239,765	271,636	844,153	123,976
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
7	Other salaries and wages........	3,982,801	3,386,876	242,736	353,189
8	Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....	242,291	195,541	19,356	27,394
9	Other employee benefits .......	735,090	627,345	47,153	60,592
10	Payroll taxes ...........	366,024	273,878	60,314	31,832
11	Fees for services (non-employees):
a	Management ......	0
b	Legal .........	55,363		55,363
c	Accounting ...........	111,332		111,332
d	Lobbying ...........	0
e	Professional fundraising services. See Part IV, line 17	0
f	Investment management fees ......	994,886		994,886
g	Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O)	0
12	Advertising and promotion ....	0
13	Office expenses .......	65,830		65,830
14	Information technology ......	147,571		147,571
15	Royalties ..	0
16	Occupancy ...........	909,846	909,846
17	Travel ............	0
18	Payments of travel or entertainment expenses for any federal, state, or local public officials .	0
19	Conferences, conventions, and meetings ....	499,197	499,197
20	Interest ...........	0
21	Payments to affiliates .......	0
22	Depreciation, depletion, and amortization ..	677,885	581,445	92,000	4,440
23	Insurance ...	118,016		118,016
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	Printing and Publications	632,107	632,107
b	Library operations	596,599	596,599
c	FASB benefits expenses	428,313	305,923	83,292	39,098
d	Special Purposes Library	309,954	309,954
e	All other expenses	1,704,722	958,599	590,984	155,139
25	Total functional expenses. Add lines 1 through 24e	15,571,638	11,302,992	3,472,986	795,660
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 ........			7,324,332	1	712,018
2	Savings and temporary cash investments .........			13,430,560	2	10,503,888
3	Pledges and grants receivable, net ......			723	3	52,750
4	Accounts receivable, net .............				4	0
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 .......
					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) ...
					6	0
7	Notes and loans receivable, net ...........				7	0
8	Inventories for sale or use ............				8	0
9	Prepaid expenses and deferred charges ......			345,720	9	449,978
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	32,356,622
b	Less: accumulated depreciation	10b	20,014,076	12,526,881	10c	12,342,546
11	Investments—publicly traded securities .			190,448,076	11	207,388,639
12	Investments—other securities. See Part IV, line 11 .....			67,959,064	12	78,798,337
13	Investments—program-related. See Part IV, line 11 ..				13	0
14	Intangible assets ...............				14	0
15	Other assets. See Part IV, line 11 ...........			2	15	1
16	Total assets. Add lines 1 through 15 (must equal line 33)...			292,035,358	16	310,248,157

17	Accounts payable and accrued expenses .....	417,615	17	196,386
18	Grants payable ...		18
19	Deferred revenue .........		19
20	Tax-exempt bond liabilities .........		20
21	Escrow or custodial account liability. Complete Part IV of Schedule D		21
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 .........
			22
23	Secured mortgages and notes payable to unrelated third parties ..		23
24	Unsecured notes and loans payable to unrelated third parties ..		24
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	7,805,290	25	7,519,180
26	Total liabilities. Add lines 17 through 25..	8,222,905	26	7,715,566

	Organizations that follow FASB ASC 958, check here and complete lines 27, 28, 32, and 33.
27	Net assets without donor restrictions ..........	40,227,807	27	41,926,525
28	Net assets with donor restrictions ...........	243,584,646	28	260,606,066
	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 ...........	283,812,453	32	302,532,591
33	Total liabilities and net assets/fund balances ........	292,035,358	33	310,248,157

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