TY 2023 Form 990

- TIN:

Form990

Department of the TreasuryInternal Revenue Service

Return of Organization Exempt From Income Tax

Under section 501(c), 527, or 4947(a)(1) of the Internal Revenue Code (except private foundations)

Do not enter social security numbers on this form as it may be made public.

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

OMB No. 1545-0047

2023

Open to Public Inspection

A For the 2023 calendar year, or tax year beginning 01-01-2023 , and ending 12-31-2023

BCheck if applicable: Address change Name change Initial return Final return/terminated Amended return Application pending

CName of organization
American Institute of Physics Inc

% CATHERINE G SWARTZ CFAO

Doing business as

Number and street (or P.O. box if mail is not delivered to street address)
One Physics Ellipse

Room/suite

City or town, state or province, country, and ZIP or foreign postal code
College Park, MD207403843

D Employer identification number

13-1667053

E Telephone number

G Gross receipts $ 99,980,576

F Name and address of principal officer:
MICHAEL MOLONEY
One Physics Ellipse
College Park,MD207403843

Tax-exempt status: 501(c)(3) 501(c) ( ) (insert no.) 4947(a)(1) or 527

Website:

www.aip.org

H(a)

Is this a group return for
subordinates? Yes No

H(b)

Are all subordinates
included?

Yes No

If "No," attach a list. See instructions.

H(c)

Group exemption number

K Form of organization: Corporation Trust Association Other

L Year of formation: 1931

M State of legal domicile: NY

Part I

Summary

1	Briefly describe the organization’s mission or most significant activities: AIP'S MISSION IS TO ADVANCE, PROMOTE AND SERVE THE PHYSICAL SCIENCES FOR THE BENEFIT OF HUMANITY.
2	Check this box
3	Number of voting members of the governing body (Part VI, line 1a) ........	3	17
4	Number of independent voting members of the governing body (Part VI, line 1b) .....	4	16
5	Total number of individuals employed in calendar year 2023 (Part V, line 2a) ......	5	320
6	Total number of volunteers (estimate if necessary) .............	6	170
7a	Total unrelated business revenue from Part VIII, column (C), line 12 ........	7a	2,653,879
b	Net unrelated business taxable income from Form 990-T, Part I, line 11 .........	7b	68,552

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	941,709	2,260,680
9	Program service revenue (Part VIII, line 2g) .........	72,641,754	71,915,614
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	5,695,574	5,901,889
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	2,153,410	19,902,393
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)	81,432,447	99,980,576
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	1,376,290	2,591,700
14	Benefits paid to or for members (Part IX, column (A), line 4).....	0	0
15	Salaries, other compensation, employee benefits (Part IX, column (A), lines 5–10)	38,511,163	39,612,369
16a	Professional fundraising fees (Part IX, column (A), line 11e) .....	0	0
b	Total fundraising expenses (Part IX, column (D), line 25) 2,861,430
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24e)....	47,092,574	46,625,659
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	86,980,027	88,829,728
19	Revenue less expenses. Subtract line 18 from line 12.......	-5,547,580	11,150,848
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16).............	255,063,460	287,934,976
21	Total liabilities (Part X, line 26).............	41,456,661	39,035,622
22	Net assets or fund balances. Subtract line 21 from line 20.....	213,606,799	248,899,354

Part II

Signature Block

Under penalties of perjury, I declare that I have examined this return, including accompanying schedules and statements, and to the best of my knowledge and belief, it is true, correct, and complete. Declaration of preparer (other than officer) is based on all information of which preparer has any knowledge.

Sign Here

	Signature of officer	Date

	Type or print name and title

Paid Preparer Use Only

Print/Type preparer's name

Preparer's signature

Date

Check if
self-employed

PTIN

Firm's name

Firm's EIN

Firm's address

Phone no.

May the IRS discuss this return with the preparer shown above? See Instructions. ..........YesNo

For Paperwork Reduction Act Notice, see the separate instructions.

Cat. No. 11282Y Form 990 (2023)

Form 990 (2023)

Page 2

Part III

Statement of Program Service Accomplishments

Check if Schedule O contains a response or note to any line in this Part III..............

Briefly describe the organization’s mission: SEE SCHEDULE O

Did the organization undertake any significant program services during the year which were not listed on
the prior Form 990 or 990-EZ? ..................... Yes No

If "Yes," describe these new services on Schedule O.

Did the organization cease conducting, or make significant changes in how it conducts, any program
services? ........................... Yes No

If "Yes," describe these changes on Schedule O.

Describe the organization’s program service accomplishments for each of its three largest program services, as measured by expenses. Section 501(c)(3) and 501(c)(4) organizations are required to report the amount of grants and allocations to others, the total expenses, and revenue, if any, for each program service reported.


4a	(Code: ) (Expenses $ 55,263,548 including grants of $ 50,700 ) (Revenue $ 68,142,754 )
	PUBLISHING RELATED. SEE SCHEDULE O

4b	(Code: ) (Expenses $ 17,080,593 including grants of $ 2,541,000 ) (Revenue $ 1,118,981 )
	PHYSICAL SCIENCE PROGRAMS AND RESOURCES. SEE SCHEDULE O

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












4d	Other program services (Describe in Schedule O.)
	(Expenses $ including grants of $ ) (Revenue $ )
4e	Total program service expenses72,344,141

Form 990 (2023)

Page 3

Part IV

Checklist of Required Schedules

Yes

Is the organization described in section 501(c)(3) or 4947(a)(1) (other than a private foundation)? If "Yes," complete Schedule A Click to see attachment

List of Attached Documents:

// Content

.....................

Yes

Is the organization required to complete Schedule B, Schedule of Contributors? See instructions. Click to see attachment

List of Attached Documents:

// Content

...

Yes

Did the organization engage in direct or indirect political campaign activities on behalf of or in opposition to candidates for public office? If "Yes," complete Schedule C, Part I.............

Section 501(c)(3) organizations. Did the organization engage in lobbying activities, or have a section 501(h) election in effect during the tax year? If "Yes," complete Schedule C, Part II.........

Is the organization a section 501(c)(4), 501(c)(5), or 501(c)(6) organization that receives membership dues, assessments, or similar amounts as defined in Rev. Proc. 98-19? If "Yes," complete Schedule C, Part III..

Did the organization maintain any donor advised funds or any similar funds or accounts for which donors have the right to provide advice on the distribution or investment of amounts in such funds or accounts? If "Yes," complete Schedule D, Part I Click to see attachment

List of Attached Documents:

// Content

.........................

Did the organization receive or hold a conservation easement, including easements to preserve open space,
the environment, historic land areas, or historic structures? If "Yes," complete Schedule D, Part II Click to see attachment

List of Attached Documents:

// Content

....

Did the organization maintain collections of works of art, historical treasures, or other similar assets? If "Yes,"
complete Schedule D, Part III Click to see attachment

List of Attached Documents:

// Content

..............

Yes

Did the organization report an amount in Part X, line 21 for escrow or custodial account liability; serve as a custodian for amounts not listed in Part X; or provide credit counseling, debt management, credit repair, or debt negotiation services? If "Yes," complete Schedule D, Part IV Click to see attachment

List of Attached Documents:

// Content

..............

Did the organization, directly or through a related organization, hold assets in temporarily restricted endowments, permanent endowments, or quasi endowments? If "Yes," complete Schedule D, Part V Click to see attachment

List of Attached Documents:

// Content

......

Yes

If the organization’s answer to any of the following questions is "Yes," then complete Schedule D, Parts VI, VII, VIII, IX, or X, as applicable.

Did the organization report an amount for land, buildings, and equipment in Part X, line 10? If "Yes," complete
Schedule D, Part VI. Click to see attachment

List of Attached Documents:

// Content

...................

11a

Yes

Did the organization report an amount for investments—other securities in Part X, line 12 that is 5% or more of its total assets reported in Part X, line 16? If "Yes," complete Schedule D, Part VII Click to see attachment

List of Attached Documents:

// Content

.......

11b

Did the organization report an amount for investments—program related in Part X, line 13 that is 5% or more of its total assets reported in Part X, line 16? If "Yes," complete Schedule D, Part VIII Click to see attachment

List of Attached Documents:

// Content

.......

11c

Did the organization report an amount for other assets in Part X, line 15 that is 5% or more of its total assets reported in Part X, line 16? If "Yes," complete Schedule D, Part IX Click to see attachment

List of Attached Documents:

// Content

............

11d

Yes

Did the organization report an amount for other liabilities in Part X, line 25? If "Yes," complete Schedule D, Part X Click to see attachment

List of Attached Documents:

// Content

11e

Yes

Did the organization’s separate or consolidated financial statements for the tax year include a footnote that addresses the organization’s liability for uncertain tax positions under FIN 48 (ASC 740)? If "Yes," complete Schedule D, Part X Click to see attachment

List of Attached Documents:

// Content

11f

Yes

12a

Did the organization obtain separate, independent audited financial statements for the tax year? If "Yes," complete
Schedule D, Parts XI and XII Click to see attachment

List of Attached Documents:

// Content

......................

12a

Was the organization included in consolidated, independent audited financial statements for the tax year? If "Yes," and if the organization answered "No" to line 12a, then completing Schedule D, Parts XI and XII is optional Click to see attachment

List of Attached Documents:

// Content

12b

Yes

Is the organization a school described in section 170(b)(1)(A)(ii)? If "Yes," complete Schedule E

14a

Did the organization maintain an office, employees, or agents outside of the United States? .....

14a

Yes

Did the organization have aggregate revenues or expenses of more than $10,000 from grantmaking, fundraising, business, investment, and program service activities outside the United States, or aggregate foreign investments valued at $100,000 or more? If "Yes," complete Schedule F, Parts I and IV......... Click to see attachment

List of Attached Documents:

// Content

14b

Yes

Did the organization report on Part IX, column (A), line 3, more than $5,000 of grants or other assistance to or for any foreign organization? If “Yes,” complete Schedule F, Parts II and IV..... Click to see attachment

List of Attached Documents:

// Content

Yes

Did the organization report on Part IX, column (A), line 3, more than $5,000 of aggregate grants or other assistance to or for foreign individuals? If “Yes,” complete Schedule F, Parts III and IV... Click to see attachment

List of Attached Documents:

// Content

Yes

Did the organization report a total of more than $15,000 of expenses for professional fundraising services on Part IX, column (A), lines 6 and 11e? If "Yes," complete Schedule G, Part I. See instructions. ....

Did the organization report more than $15,000 total of fundraising event gross income and contributions on Part VIII, lines 1c and 8a? If "Yes," complete Schedule G, Part II............

Did the organization report more than $15,000 of gross income from gaming activities on Part VIII, line 9a? If "Yes," complete Schedule G, Part III...................

20a

Did the organization operate one or more hospital facilities? If "Yes," complete Schedule H....

20a

If "Yes" to line 20a, did the organization attach a copy of its audited financial statements to this return?

20b

Did the organization report more than $5,000 of grants or other assistance to any domestic organization or domestic government on Part IX, column (A), line 1? If “Yes,” complete Schedule I, Parts I and II..... Click to see attachment

List of Attached Documents:

// Content

Yes

Form 990 (2023)

Page 4

Part IV

Checklist of Required Schedules (continued)

Yes

Did the organization report more than $5,000 of grants or other assistance to or for domestic individuals on Part IX, column (A), line 2? If “Yes,” complete Schedule I, Parts I and III........ Click to see attachment

List of Attached Documents:

// Content

Yes

Did the organization answer "Yes" to Part VII, Section A, line 3, 4, or 5, about compensation of the organization’s current and former officers, directors, trustees, key employees, and highest compensated employees? If "Yes," complete Schedule J....................... Click to see attachment

List of Attached Documents:

// Content

Yes

24a

Did the organization have a tax-exempt bond issue with an outstanding principal amount of more than $100,000 as of the last day of the year, that was issued after December 31, 2002? If “Yes,” answer lines 24b through 24d and complete Schedule K. If “No,” go to line 25a...............

24a

Did the organization invest any proceeds of tax-exempt bonds beyond a temporary period exception?...

24b

Did the organization maintain an escrow account other than a refunding escrow at any time during the year
to defease any tax-exempt bonds? ...............

24c

Did the organization act as an "on behalf of" issuer for bonds outstanding at any time during the year?...

24d

25a

Section 501(c)(3), 501(c)(4), and 501(c)(29) organizations. Did the organization engage in an excess benefit transaction with a disqualified person during the year? If "Yes," complete Schedule L, Part I ....

25a

Is the organization aware that it engaged in an excess benefit transaction with a disqualified person in a prior year, and that the transaction has not been reported on any of the organization’s prior Forms 990 or 990-EZ? If "Yes," complete Schedule L, Part I.......................

25b

Did the organization report any amount on Part X, line 5 or 22 for receivables from or 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? If "Yes," complete Schedule L, Part II...........

Did the organization provide a grant or other assistance to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or employee thereof, a grant selection committee member, or to a 35% controlled entity (including an employee thereof) or family member of any of these persons?

If "Yes," complete

Schedule L, Part III.........................

Was the organization a party to a business transaction with one of the following parties (see the Schedule L, Part IV instructions for applicable filing thresholds, conditions, and exceptions):

A current or former officer, director, trustee, key employee, creator or founder, or substantial contributor? If "Yes," complete Schedule L, Part IV......................

28a

A family member of any individual described in line 28a? If "Yes," complete Schedule L, Part IV.....

28b

A 35% controlled entity of one or more individuals and/or organizations described in line 28a or 28b? If "Yes," complete Schedule L, Part IV.....................

28c

Did the organization receive more than $25,000 in non-cash contributions? If "Yes," complete Schedule M..

Did the organization receive contributions of art, historical treasures, or other similar assets, or qualified conservation contributions? If "Yes," complete Schedule M .................

Did the organization liquidate, terminate, or dissolve and cease operations? If "Yes," complete Schedule N, Part I

Did the organization sell, exchange, dispose of, or transfer more than 25% of its net assets? If "Yes," complete Schedule N, Part II........................

Did the organization own 100% of an entity disregarded as separate from the organization under Regulations sections 301.7701-2 and 301.7701-3? If "Yes," complete Schedule R, Part I............ Click to see attachment

List of Attached Documents:

// Content

Yes

Was the organization related to any tax-exempt or taxable entity? If "Yes," complete Schedule R, Part II, III, or IV, and Part V, line 1......................... Click to see attachment

List of Attached Documents:

// Content

Yes

35a

Did the organization have a controlled entity within the meaning of section 512(b)(13)?

35a

Yes

If ‘Yes’ to line 35a, did the organization receive any payment from or engage in any transaction with a controlled entity within the meaning of section 512(b)(13)? If "Yes," complete Schedule R, Part V, line 2 ... Click to see attachment

List of Attached Documents:

// Content

35b

Yes

Section 501(c)(3) organizations. Did the organization make any transfers to an exempt non-charitable related organization? If "Yes," complete Schedule R, Part V, line 2............. Click to see attachment

List of Attached Documents:

// Content

Did the organization conduct more than 5% of its activities through an entity that is not a related organization and that is treated as a partnership for federal income tax purposes? If "Yes," complete Schedule R, Part VI Click to see attachment

List of Attached Documents:

// Content

Did the organization complete Schedule O and provide explanations on Schedule O for Part VI, lines 11b and 19? Note. All Form 990 filers are required to complete Schedule O. ............

Yes

Part V

Statements Regarding Other IRS Filings and Tax Compliance
Check if Schedule O contains a response or note to any line in this Part V...........

Yes

Enter the number reported in box 3 of Form 1096. Enter -0- if not applicable ..

489

Enter the number of Forms W-2G included on line 1a. Enter -0- if not applicable .

Did the organization comply with backup withholding rules for reportable payments to vendors and reportable gaming (gambling) winnings to prize winners? ..................

Yes

Form 990 (2023)

Page 5

Part V

Statements Regarding Other IRS Filings and Tax Compliance (continued)

Enter the number of employees reported on Form W-3, Transmittal of Wage and
Tax Statements, filed for the calendar year ending with or within the year covered by this return ..................

320

If at least one is reported on line 2a, did the organization file all required federal employment tax returns?

Yes

Did the organization have unrelated business gross income of $1,000 or more during the year?...

Yes

If “Yes,” has it filed a Form 990-T for this year? If “No” to line 3b, provide an explanation in Schedule O...

Yes

At any time during the calendar year, did the organization have an interest in, or a signature or other authority over, a financial account in a foreign country (such as a bank account, securities account, or other financial account)? ..

Yes

If "Yes," enter the name of the foreign country: CH
See instructions for filing requirements for FinCEN Form 114, Report of Foreign Bank and Financial Accounts (FBAR).

Was the organization a party to a prohibited tax shelter transaction at any time during the tax year? ..

Did any taxable party notify the organization that it was or is a party to a prohibited tax shelter transaction?

If "Yes," to line 5a or 5b, did the organization file Form 8886-T? ............

Does the organization have annual gross receipts that are normally greater than $100,000, and did the organization solicit any contributions that were not tax deductible as charitable contributions? ...

If "Yes," did the organization include with every solicitation an express statement that such contributions or gifts were not tax deductible? ......................

Organizations that may receive deductible contributions under section 170(c).

Did the organization receive a payment in excess of $75 made partly as a contribution and partly for goods and services provided to the payor? ....................

If "Yes," did the organization notify the donor of the value of the goods or services provided? .....

Did the organization sell, exchange, or otherwise dispose of tangible personal property for which it was required to file Form 8282? .........................

If "Yes," indicate the number of Forms 8282 filed during the year ....

Did the organization receive any funds, directly or indirectly, to pay premiums on a personal benefit contract?

Did the organization, during the year, pay premiums, directly or indirectly, on a personal benefit contract? ..

If the organization received a contribution of qualified intellectual property, did the organization file Form 8899 as required? ......................

If the organization received a contribution of cars, boats, airplanes, or other vehicles, did the organization file a Form 1098-C? ..........................

Sponsoring organizations maintaining donor advised funds. Did a donor advised fund maintained by the sponsoring organization have excess business holdings at any time during the year? ........

Sponsoring organizations maintaining donor advised funds.

Did the sponsoring organization make any taxable distributions under section 4966?........

Did the sponsoring organization make a distribution to a donor, donor advisor, or related person?...

Section 501(c)(7) organizations. Enter:

Initiation fees and capital contributions included on Part VIII, line 12 ...

10a

Gross receipts, included on Form 990, Part VIII, line 12, for public use of club facilities

10b

Section 501(c)(12) organizations. Enter:

Gross income from members or shareholders .........

11a

Gross income from other sources. (Do not net amounts due or paid to other sources against amounts due or received from them.) ..........

11b

12a

Section 4947(a)(1) non-exempt charitable trusts. Is the organization filing Form 990 in lieu of Form 1041?

12a

If "Yes," enter the amount of tax-exempt interest received or accrued during the year.

12b

Section 501(c)(29) qualified nonprofit health insurance issuers.

Is the organization licensed to issue qualified health plans in more than one state? .........
Note. See the instructions for additional information the organization must report on Schedule O.

13a

Enter the amount of reserves the organization is required to maintain by the states in which the organization is licensed to issue qualified health plans ....

13b

Enter the amount of reserves on hand ............

13c

14a

Did the organization receive any payments for indoor tanning services during the tax year?.....

14a

If "Yes," has it filed a Form 720 to report these payments? If "No," provide an explanation in Schedule O..

14b

Is the organization subject to the section 4960 tax on payment(s) of more than $1,000,000 in remuneration or excess parachute payment(s) during the year? ....................
If "Yes," see the instructions and file Form 4720, Schedule N.

Is the organization an educational institution subject to the section 4968 excise tax on net investment income? ..
If "Yes," complete Form 4720, Schedule O.

Section 501(c)(21) organizations. Did the trust, or any disqualified or other person engage in any activities that would result in the imposition of an excise tax under section 4951, 4952, or 4953? ..
If "Yes," complete Form 6069.

Form 990 (2023)

Page 6

Part VI

Governance, Management, and Disclosure. For each "Yes" response to lines 2 through 7b below, and for a "No" response to lines 8a, 8b, or 10b below, describe the circumstances, processes, or changes in Schedule O. See instructions.

Check if Schedule O contains a response or note to any line in this Part VI..............

Section A. Governing Body and Management

Yes

Enter the number of voting members of the governing body at the end of the tax year

If there are material differences in voting rights among members of the governing body, or if the governing body delegated broad authority to an executive committee or similar committee, explain in Schedule O.

Enter the number of voting members included in line 1a, above, who are independent

Did any officer, director, trustee, or key employee have a family relationship or a business relationship with any other officer, director, trustee, or key employee? .................

Did the organization delegate control over management duties customarily performed by or under the direct supervision of officers, directors or trustees, or key employees to a management company or other person? .

Did the organization make any significant changes to its governing documents since the prior Form 990 was filed? .

Did the organization become aware during the year of a significant diversion of the organization’s assets? .

Did the organization have members or stockholders? ................

Yes

Did the organization have members, stockholders, or other persons who had the power to elect or appoint one or more members of the governing body? ....................

Yes

Are any governance decisions of the organization reserved to (or subject to approval by) members, stockholders, or persons other than the governing body? ...................

Yes

Did the organization contemporaneously document the meetings held or written actions undertaken during the year by the following:

The governing body? .......................

Yes

Each committee with authority to act on behalf of the governing body? ............

Yes

Is there any officer, director, trustee, or key employee listed in Part VII, Section A, who cannot be reached at the organization’s mailing address? If "Yes," provide the names and addresses in Schedule O.......

Section B. Policies (This Section B requests information about policies not required by the Internal Revenue Code.)

Yes

10a

Did the organization have local chapters, branches, or affiliates? ............

10a

If "Yes," did the organization have written policies and procedures governing the activities of such chapters, affiliates, and branches to ensure their operations are consistent with the organization's exempt purposes?

10b

11a

Has the organization provided a complete copy of this Form 990 to all members of its governing body before filing the form? ............................

11a

Yes

Describe on Schedule O the process, if any, used by the organization to review this Form 990. .....

12a

Did the organization have a written conflict of interest policy? If "No," go to line 13.......

12a

Yes

Were officers, directors, or trustees, and key employees required to disclose annually interests that could give rise to conflicts? ..........................

12b

Yes

Did the organization regularly and consistently monitor and enforce compliance with the policy? If "Yes," describe on Schedule O how this was done...................

12c

Yes

Did the organization have a written whistleblower policy? ...............

Yes

Did the organization have a written document retention and destruction policy? .........

Yes

Did the process for determining compensation of the following persons include a review and approval by independent persons, comparability data, and contemporaneous substantiation of the deliberation and decision?

The organization’s CEO, Executive Director, or top management official ...........

15a

Yes

Other officers or key employees of the organization ................

15b

Yes

If "Yes" to line 15a or 15b, describe the process on Schedule O. See instructions.

16a

Did the organization invest in, contribute assets to, or participate in a joint venture or similar arrangement with a taxable entity during the year? ......................

16a

If "Yes," did the organization follow a written policy or procedure requiring the organization to evaluate its participation in joint venture arrangements under applicable federal tax law, and take steps to safeguard the organization’s exempt status with respect to such arrangements? ............

16b

Section C. Disclosure

List the states with which a copy of this Form 990 is required to be filed

MD , NY

Section 6104 requires an organization to make its Form 1023 (1024 or 1024-A, if applicable), 990, and 990-T (section 501(c)(3)s only) available for public inspection. Indicate how you made these available. Check all that apply.

Own website Another's website Upon request Other (explain in Schedule O)

Describe in Schedule O whether (and if so, how) the organization made its governing documents, conflict of interest policy, and financial statements available to the public during the tax year.

State the name, address, and telephone number of the person who possesses the organization's books and records:
CATHERINE G SWARTZ CFAOONE PHYSICS ELLIPSE College Park,MD207403843 (301) 209-3100

Form 990 (2023)

Page 7

Part VII

Compensation of Officers, Directors,Trustees, Key Employees, Highest Compensated Employees, and Independent Contractors

Check if Schedule O contains a response or note to any line in this Part VII..............

Section A. Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees

1a Complete this table for all persons required to be listed. Report compensation for the calendar year ending with or within the organization’s tax year.
RoundBullet

List all of the organization’s current officers, directors, trustees (whether individuals or organizations), regardless of amount
of compensation. Enter -0- in columns (D), (E), and (F) if no compensation was paid.

List all of the organization’s current key employees, if any. See the instructions for definition of "key employee."

List the organization’s five current highest compensated employees (other than an officer, director, trustee or key employee)
who received reportable compensation (box 5 of Form W-2, box 6 of Form 1099-MISC, and/or box 1 of Form 1099-NEC) of more than $100,000 from the organization and any related organizations.

List all of the organization’s former officers, key employees, or highest compensated employees who received more than $100,000
of reportable compensation from the organization and any related organizations.

List all of the organization’s former directors or trustees that received, in the capacity as a former director or trustee of the
organization, more than $10,000 of reportable compensation from the organization and any related organizations.

See the instructions for the order in which to list the persons above.

Check this box if neither the organization nor any related organization compensated any current officer, director, or trustee.

(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)				(D) Reportable compensation from the organization (W-2/1099-MISC/1099-NEC)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and title
(1) ALEXANDRA VANCE...................................................................... AIPP, CEO	40.0 ................. 0.0			X		595,233	0	78,336
(2) MICHAEL MOLONEY...................................................................... CEO	40.0 ................. 10.0	X	X			614,637	0	53,859
(3) ROY LEVENSON...................................................................... AIPP, CFO	40.0 ................. 0.0			X		461,233	0	57,414
(4) ANN MICHAEL...................................................................... AIPP,Chief Transformation Ofcr	40.0 ................. 0.0			X		434,699	0	63,850
(5) DEAN SANDERSON...................................................................... AIPP, CHIEF STRATEGY OFFICER	40.0 ................. 0.0			X		424,521	0	68,727
(6) CATHERINE SWARTZ...................................................................... CFAO	40.0 ................. 10.0		X			426,277	0	53,835
(7) PENELOPE DONHAUSER...................................................................... AIPP, CHIEF PUBLISHING OFFICER	40.0 ................. 0.0			X		340,578	0	35,672
(8) TRACY DENIEN...................................................................... AIPP, HEAD OF INFO TECHNOLOGY	40.0 ................. 0.0			X		233,643	0	69,979
(9) KEVIN STEINER...................................................................... AIPP, HEAD OF GLOBAL SALES	40.0 ................. 0.0			X		246,247	0	53,902
(10) SARA GIRARD...................................................................... AIPP, HEAD OF MKT AND COMM	40.0 ................. 0.0				X	239,174	0	53,292
(11) MELISSA ANNE SCHELD...................................................................... AIPP, SENIOR SALES MANAGER	40.0 ................. 0.0				X	247,394	0	37,727
(12) SCOTT MONTGOMERY...................................................................... CHIEF CONTENT OFFICER	40.0 ................. 0.0			X		258,326	0	19,084
(13) MADELINE SUTTON...................................................................... AIPP, HEAD OF PEOPLE & CULTURE	40.0 ................. 0.0				X	212,307	0	49,804
(14) SHERRY RENDER...................................................................... CONTROLLER & DIR OF FINANCE	40.0 ................. 0.0				X	211,813	0	42,498
(15) LIZ DART CARON...................................................................... CHIEF OF STAFF	40.0 ................. 0.0				X	203,404	0	20,737
(16) JAMES TAYLOR...................................................................... CHIEF FED OFFICER	40.0 ................. 3.0		X			191,945	0	14,407
(17) DAVID HELFAND...................................................................... CHAIR	10.0 ................. 10.0	X	X			70,000	0	0

Form 990 (2023)

Page 8

Part VII

Section A. Officers, Directors, Trustees, Key Employees, and Highest Compensated Employees (continued)

(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)		(D) Reportable compensation from the organization (W-2/1099-MISC/1099-NEC)	(E) Reportable compensation from related organizations (W-2/1099-MISC/1099-NEC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and title
(18) SUSAN AVERY........................................................................ TREAS. & DIR AT LARGE	8.0 .......................0.0	X	X	30,000	0	0
(19) JUDY DUBNO........................................................................ SECRETARY	10.0 .......................0.0	X	X	4,500	0	0
(20) JONATHAN BAGGER........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(21) VALERIE BROWNING........................................................................ DIR. at large (AS ON 03/23)	4.0 .......................0.0	X		0	0	0
(22) SUSAN BURKETT........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(23) BRUCE CURRAN........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(24) ERIC FURST........................................................................ VICE-CHAIR & Director	4.0 .......................0.0	X	X	0	0	0
(25) JACK HEHN........................................................................ DIRECTOR	8.0 .......................0.0	X		0	0	0
(26) MARY JAMES........................................................................ DIRECTOR at large	4.0 .......................0.0	X		0	0	0
(27) STELLA KAFKA........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(28) TYRONE PORTER........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(29) EFRAIN RODRIQUEZ........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(30) LIZ ROGAN........................................................................ DIRECTOR	4.0 .......................0.0	X		0	0	0
(31) NATHAN SANDERS........................................................................ DIRECTOR at Large	4.0 .......................0.0	X		0	0	0
(32) CHICK WOODWARD........................................................................ DIRECTOR	8.0 .......................0.0	X		0	0	0

1b	Sub-Total..............
c	Total from continuation sheets to Part VII, Section A..
d	Total (add lines 1b and 1c).........	5,445,931	0	773,123

Total number of individuals (including but not limited to those listed above) who received more than $100,000 of reportable compensation from the organization 114

Yes

Did the organization list any former officer, director or trustee, key employee, or highest compensated employee on line 1a? If "Yes," complete Schedule J for such individual ..............

For any individual listed on line 1a, is the sum of reportable compensation and other compensation from the organization and related organizations greater than $150,000? If "Yes," complete Schedule J for such
individual...........................

Yes

Did any person listed on line 1a receive or accrue compensation from any unrelated organization or individual for services rendered to the organization? If "Yes," complete Schedule J for such person ........

Section B. Independent Contractors

Complete this table for your five highest compensated independent contractors that received more than $100,000 of compensation from the organization. Report compensation for the calendar year ending with or within the organization’s tax year.

(A) Name and business address	(B) Description of services	(C) Compensation
ORIGIN EDITORIAL LLC, 14274 W 88TH DRIVE UNIT A ARVADA,CO80005	EDITORIAL OPERATIONS	2,085,968
Silverchair Sci Communications, 316 E Main Street Suite 300 CHARLOTTESVILLE,VA22902	PUBLICATION PLATFORM	885,745
LSC COMMUNICATIONS MCL LLC, 4101 WINFIELD ROAD WARRENVILLE,IL60555	PRINT PRODUCTION	520,650
BRYAN CAVE LEIGHTON PAISNER, 1155 F Street WASHINGTON,DC20004	LEGAL FEES	504,036
OPTIMAL PERFORMANCE SEEKERS, 8 MORGAN HILL DRIVE DOYLESTOWN,PA18901	TRANSFORMATION CONS.	420,000
2 Total number of independent contractors (including but not limited to those listed above) who received more than $100,000 of compensation from the organization 17

Form 990 (2023)

Page 9

Part VIII

Statement of Revenue

Check if Schedule O contains a response or note to any line in this Part VIII.............

(A)
Total revenue

(B)
Related or
exempt
function
revenue

(D)
Revenue
excluded from
tax under sections
512 - 514

1a	Federated campaigns..		1a
b	Membership dues..		1b
c	Fundraising events..		1c
d	Related organizations		1d	2,126,866
e	Government grants (contributions)		1e	83,411

f	All other contributions, gifts, grants, and similar amounts not included above		1f	50,403

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

h Total. Add lines 1a-1f.......		2,260,680

		Business Code
2a	PUBLISHING RELATED	511120	69,725,768	68,142,754	1,583,014
b	PHYSICAL SCIENCES	900099	2,189,846	1,118,981	1,070,865
c
d
e
f	All other program service revenue.
g	Total. Add lines 2a–2f .....		71,915,614

3 Investment income (including dividends, interest, and othersimilar amounts) ......			4,541,858			4,541,858
4 Income from investment of tax-exempt bond proceeds			0
5 Royalties...........			0
			(i) Real	(ii) Personal
6a	Gross rents	6a
b	Less: rental expenses	6b
c	Rental income or (loss)	6c	0	0
d	Net rental income or (loss).......			0
			(i) Securities	(ii) Other
7a	Gross amount from sales of assets other than inventory	7a	1,360,031
b	Less: cost or other basis and sales expenses	7b
c	Gain or (loss)	7c	1,360,031
d	Net gain or (loss).........			1,360,031			1,360,031
8a	Gross income from fundraising events (not including $ of contributions reported on line 1c). See Part IV, line 18 ....
			8a	0
b	Less: direct expenses ...		8b	0
c	Net income or (loss) from fundraising events..			0
9a	Gross income from gaming activities. See Part IV, line 19 ...
			9a	0
b	Less: direct expenses ...		9b	0
c	Net income or (loss) from gaming activities..			0
10a	Gross sales of inventory, less returns and allowances ..
			10a	0
b	Less: cost of goods sold ..		10b	0
c	Net income or (loss) from sales of inventory..			0

Business Code
11a	EQUITY GAIN ON ACP		900099	16,032,973			16,032,973
b	PASS THRU MEMBER SOCIETY		900099	2,857,345			2,857,345
c	SHARED SERVICES REVENUE AIPF		900099	1,012,075			1,012,075
d	All other revenue ....
e	Total. Add lines 11a–11d ......			19,902,393
12	Total revenue. See instructions.....			99,980,576	69,261,735	2,653,879	25,804,282

Form 990 (2023)

Page 10

Part IX

Statement of Functional Expenses

Section 501(c)(3) and 501(c)(4) organizations must complete all columns. All other organizations must complete column (A).Check if Schedule O contains a response or note to any line in this Part IX..............

Do not include amounts reported on lines 6b, 7b, 8b, 9b, and 10b of Part VIII.		(A) Total expenses	(B) Program service expenses	(C) Management and general expenses	(D) Fundraising expenses

1	Grants and other assistance to domestic organizations and domestic governments. See Part IV, line 21 ....	1,379,850	1,379,850
2	Grants and other assistance to domestic individuals. See Part IV, line 22 ...........	1,189,857	1,189,857
3	Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, lines 15 and 16. .............	21,993	21,993
4	Benefits paid to or for members .......	0
5	Compensation of current officers, directors, trustees, and key employees ...........	5,341,430	3,181,519	2,159,911
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........	24,824,624	14,852,759	9,198,856	773,009
8	Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....	2,592,334	1,936,316	590,796	65,222
9	Other employee benefits .......	4,716,226	3,507,470	1,088,740	120,016
10	Payroll taxes ...........	2,137,755	1,596,655	487,271	53,829
11	Fees for services (non-employees):
a	Management ......	6,803,110	5,485,669	1,317,441
b	Legal .........	727,597		727,597
c	Accounting ...........	247,171		247,171
d	Lobbying ...........	0
e	Professional fundraising services. See Part IV, line 17	0
f	Investment management fees ......	133,508		133,508
g	Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O)	283,315	68,142	215,173
12	Advertising and promotion ....	3,110,007	3,110,007
13	Office expenses .......	2,764,268	1,503,643	1,256,526	4,099
14	Information technology ......	5,351,691	3,282,447	2,068,956	288
15	Royalties ..	0
16	Occupancy ...........	1,093,680	177,503	916,177
17	Travel ............	1,239,759	889,749	335,830	14,180
18	Payments of travel or entertainment expenses for any federal, state, or local public officials .	0
19	Conferences, conventions, and meetings ....	1,309,204	593,461	708,614	7,129
20	Interest ...........	0
21	Payments to affiliates .......	1,424,609			1,424,609
22	Depreciation, depletion, and amortization ..	904,515	376,409	528,106
23	Insurance ...	221,880		221,880
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	PASS THRU MEMBER SOCIETY	9,440,700	6,671,352	2,769,348
b	EDIT MANAGEMENT	6,228,567	6,228,567
c	PUBLISHING PRODUCTION	5,342,078	5,341,997	81
d	INDIRECT ALLOCATION		10,948,776	-11,347,825	399,049
e	All other expenses
25	Total functional expenses. Add lines 1 through 24e	88,829,728	72,344,141	13,624,157	2,861,430
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).

Form 990 (2023)

Page 11

Part X

Balance Sheet

Check if Schedule O contains a response or note to any line in this Part IX..............

				(A) Beginning of year		(B) End of year

1	Cash–non-interest-bearing ........			8,074,594	1	6,236,144
2	Savings and temporary cash investments .........			14,327,815	2	18,479,719
3	Pledges and grants receivable, net ......			0	3	0
4	Accounts receivable, net .............			6,440,285	4	7,322,950
5	Loans and other receivables from any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .......
				0	5	0
6	Loans and other receivables from other disqualified persons (as defined under section 4958(f)(1)), and persons described in section 4958(c)(3)(B) ...
				0	6	0
7	Notes and loans receivable, net ...........			129,391	7	61,463
8	Inventories for sale or use ............			253,850	8	197,072
9	Prepaid expenses and deferred charges ......			4,500,556	9	3,235,050
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	13,706,223
b	Less: accumulated depreciation	10b	12,810,852	1,216,452	10c	895,371
11	Investments—publicly traded securities .			197,199,763	11	213,777,941
12	Investments—other securities. See Part IV, line 11 .....			0	12	0
13	Investments—program-related. See Part IV, line 11 ..			608,009	13	608,009
14	Intangible assets ...............			1,120,395	14	0
15	Other assets. See Part IV, line 11 ...........			21,192,350	15	37,121,257
16	Total assets. Add lines 1 through 15 (must equal line 33)...			255,063,460	16	287,934,976

17	Accounts payable and accrued expenses .....	7,697,488	17	8,351,227
18	Grants payable ...	0	18	0
19	Deferred revenue .........	21,422,217	19	20,495,498
20	Tax-exempt bond liabilities .........	0	20	0
21	Escrow or custodial account liability. Complete Part IV of Schedule D	0	21	0
22	Loans and other payables to any current or former officer, director, trustee, key employee, creator or founder, substantial contributor, or 35% controlled entity or family member of any of these persons .........
		0	22	0
23	Secured mortgages and notes payable to unrelated third parties ..	0	23	0
24	Unsecured notes and loans payable to unrelated third parties ..	50,000	24	0
25	Other liabilities (including federal income tax, payables to related third parties, and other liabilities not included on lines 17 - 24). Complete Part X of Schedule D	12,286,956	25	10,188,897
26	Total liabilities. Add lines 17 through 25..	41,456,661	26	39,035,622

	Organizations that follow FASB ASC 958, check here and complete lines 27, 28, 32, and 33.
27	Net assets without donor restrictions ..........	174,141,706	27	204,715,368
28	Net assets with donor restrictions ...........	39,465,093	28	44,183,986
	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 ...........	213,606,799	32	248,899,354
33	Total liabilities and net assets/fund balances ........	255,063,460	33	287,934,976

Form 990 (2023)

Page 12

Part XI

Reconcilliation of Net Assets

Check if Schedule O contains a response or note to any line in this Part XI..............

Total revenue (must equal Part VIII, column (A), line 12) ............

99,980,576

Total expenses (must equal Part IX, column (A), line 25) ............

88,829,728

Revenue less expenses. Subtract line 2 from line 1 ..............

11,150,848

Net assets or fund balances at beginning of year (must equal Part X, line 32, column (A)) ..

213,606,799

Net unrealized gains (losses) on investments ...............

24,184,054

Donated services and use of facilities .................

Investment expenses .....................

Prior period adjustments .....................

Other changes in net assets or fund balances (explain in Schedule O) ........

-42,347

Net assets or fund balances at end of year. Combine lines 3 through 9 (must equal Part X, line 32, column (B))

248,899,354

Part XII

Financial Statements and Reporting

Check if Schedule O contains a response or note to any line in this Part XII.............

Yes

Accounting method used to prepare the Form 990: Cash Accrual Other
If the organization changed its method of accounting from a prior year or checked "Other," explain on
Schedule O.

Were the organization’s financial statements compiled or reviewed by an independent accountant?

If ‘Yes,’ check a box below to indicate whether the financial statements for the year were compiled or reviewed on a separate basis, consolidated basis, or both:

Separate basis Consolidated basis Both consolidated and separate basis

Were the organization’s financial statements audited by an independent accountant?

Yes

If ‘Yes,’ check a box below to indicate whether the financial statements for the year were audited on a separate basis, consolidated basis, or both:

Separate basis Consolidated basis Both consolidated and separate basis

If "Yes," to line 2a or 2b, does the organization have a committee that assumes responsibility for oversight of the audit, review, or compilation of its financial statements and selection of an independent accountant?

Yes

If the organization changed either its oversight process or selection process during the tax year, explain in Schedule O.

As a result of a federal award, was the organization required to undergo an audit or audits as set forth in the Uniform Guidance, 2 C.F.R. Part 200, Subpart F?

If "Yes," did the organization undergo the required audit or audits? If the organization did not undergo the required audit or audits, explain why in Schedule O and describe any steps taken to undergo such audits.

Form 990 (2023)

Additional Data

Software ID:
Software Version:

Form 990, Special Condition Description:

Special Condition Description

- 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

2023

Open to Public
Inspection

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

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) 2023

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) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grant.") ..
2	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf ....
3	The value of services or facilities furnished by a governmental unit to the organization without charge..
4	Total. Add lines 1 through 3
5	The portion of total contributions by each person (other than a governmental unit or publicly supported organization) included on line 1 that exceeds 2% of the amount shown on line 11, column (f) ..
6	Public support. Subtract line 5 from line 4.

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
7	Amounts from line 4..
8	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources...
9	Net income from unrelated business activities, whether or not the business is regularly carried on..
10	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.)..
11	Total support. Add lines 7 through 10

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

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

Section C. Computation of Public Support Percentage

Public support percentage for 2023 (line 6, column (f) divided by line 11, column (f)) .........

Public support percentage for 2022 Schedule A, Part II, line 14 ...............

16a

33 1/3% support test—2023. 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—2022. 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—2023. 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—2022. 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) 2023

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) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grants.") .	7,147,272	460,087	730,180	941,709	2,260,680	11,539,928
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	66,215,116	66,750,486	70,363,354	72,641,754	71,915,614	347,886,324
3	Gross receipts from activities that are not an unrelated trade or business under section 513 .....						0
4	Tax revenues levied for the organization's benefit and either paid to or expended on its behalf...						0
5	The value of services or facilities furnished by a governmental unit to the organization without charge						0
6	Total. Add lines 1 through 5	73,362,388	67,210,573	71,093,534	73,583,463	74,176,294	359,426,252
7a	Amounts included on lines 1, 2, and 3 received from disqualified persons						0
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.						0
c	Add lines 7a and 7b..						0
8	Public support. (Subtract line 7c from line 6.)						359,426,252

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2019	(b) 2020	(c) 2021	(d) 2022	(e) 2023	(f) Total
9	Amounts from line 6...	73,362,388	67,210,573	71,093,534	73,583,463	74,176,294	359,426,252
10a	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources..	6,132,373	5,599,527	6,326,203	4,142,919	4,541,858	26,742,880
b	Unrelated business taxable income (less section 511 taxes) from businesses acquired after June 30, 1975.						0
c	Add lines 10a and 10b.	6,132,373	5,599,527	6,326,203	4,142,919	4,541,858	26,742,880
11	Net income from unrelated business activities not included on line 10b, whether or not the business is regularly carried on.						0
12	Other income. Do not include gain or loss from the sale of capital assets (Explain in Part VI.) ..	1,822,126	5,171,975	4,667,437	2,153,410	19,902,393	33,717,341
13	Total support. (Add lines 9, 10c, 11, and 12.)..	81,316,887	77,982,075	82,087,174	79,879,792	98,620,545	419,886,473

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 2023 (line 8, column (f) divided by line 13, column (f)) .........

85.601 %

Public support percentage from 2022 Schedule A, Part III, line 15 ...............

87.790 %

Section D. Computation of Investment Income Percentage

Investment income percentage for 2023 (line 10c, column (f) divided by line 13, column (f)) ......

6.369 %

Investment income percentage from 2022 Schedule A, Part III, line 17 .............

6.989 %

19a

33 1/3% support tests-2023. 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—2022. 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) 2023

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) 2023

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) 2023

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) 2023

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 2023 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-2023	(iii) Distributable Amount for 2023
1 Distributable amount for 2023 from Section C, line 6
2 Underdistributions, if any, for years prior to 2023 (reasonable cause required-- explain in Part VI). See instructions.
3 Excess distributions carryover, if any, to 2023:
a From 2018.......
b From 2019.......
c From 2020.......
d From 2021.......
e From 2022.......
fTotal of lines 3a through e
g Applied to underdistributions of prior years
h Applied to 2023 distributable amount
i Carryover from 2018 not applied (see instructions)
j Remainder. Subtract lines 3g, 3h, and 3i from line 3f.
4Distributions for 2023 from Section D, line 7:
$
a Applied to underdistributions of prior years
b Applied to 2023 distributable amount
c Remainder. Subtract lines 4a and 4b from line 4.
5 Remaining underdistributions for years prior to 2023, 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 2023. 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 2024. Add lines 3j and 4c.
8 Breakdown of line 7:
a Excess from 2019.....
b Excess from 2020.....
c Excess from 2021.....
d Excess from 2022.....
e Excess from 2023.....

Schedule A (Form 990) (2023)

Schedule A (Form 990) 2023

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) 2023

Additional Data

Software ID:
Software Version:

- TIN:

Schedule B
(Form 990)

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

2023

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

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 ......... Arrow Bullet

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) (2023)

Schedule B (Form 990) (2023) Page 2

Name of organization American Institute of Physics Inc

Part I Contributors	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) (2023)

Schedule B (Form 990) (2023)

Page 3

Name of organization American Institute of Physics Inc		Employer identification number 13-1667053

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) (2023)

Schedule B (Form 990) (2023)

Page 4


Name of organization American Institute of Physics Inc			Employer identification number 13-1667053
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) (2023)

Additional Data

Software ID:
Software Version:

- 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

2022

Open to Public Inspection

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

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) 2022

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 ....	138,387,439	161,729,217	142,726,495	132,756,089	111,211,052
b	Contributions ...			2,017,542	355	6,762,670
c	Net investment earnings, gains, and losses	21,634,816	-18,245,673	21,963,707	15,454,894	20,297,013
d	Grants or scholarships ...
e	Other expenditures for facilities and programs ...	5,510,061	5,096,105	4,978,527	5,484,843	5,514,646
f	Administrative expenses ....
g	End of year balance ......	154,512,194	138,387,439	161,729,217	142,726,495	132,756,089

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

Board designated or quasi-endowment right arrow

78.000 %

Permanent endowment right arrow

15.000 %

Term endowment right arrow

7.000 %

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 ....
c	Leasehold improvements	4,647,409	4,476,871	170,538
d	Equipment ....	9,058,814	8,333,981	724,833
e	Other .....
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..				895,371

Schedule D (Form 990) 2022

Page 3

Part VII

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

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

Part VIII

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

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

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

Part IX

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

(a) Description				(b) Book value
(1)INVESTMENT IN ACP				34,510,862
(2)ROU ASSET - OPERATING LEASE				1,614,489
(3)GOODWILL				995,906
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 15.)...........				37,121,257

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	0
POST RETIREMENT MEDICAL PLAN	5,218,170
DUE TO MEMBER SOCIETIES	2,907,727
ROU LIABILITY - OPERATING LEASE	2,063,000






Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)	10,188,897
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) 2022

Page 4

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

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

Part XIII

Supplemental Information

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

Return Reference

Explanation

SCHEDULE D, PART V, LINE 4:

AIP HAS 15 SEPARATE FUNDS WHICH HAVE BEEN ENDOWED BY DONORS. THE EARNINGS FROM THE ENDOWMENTS HELP SUPPORT THE HISTORY CENTER, THE NIELS BOHR LIBRARY AND ARCHIVES, AND SOCIETY OF PHYSICS STUDENTS, AND OTHER AREAS RELATED TO THE PHYSICAL SCIENCES, WHICH ALLOWS AIP TO CONTINUE TO PRESERVE HISTORICAL DOCUMENTS RELATED TO PHYSICS, OFFER LECTURES THAT ARE OPEN TO THE PUBLIC, PRESENT AWARDS AND GRANTS FOR ACHIEVEMENTS IN PHYSICS AND HELP SUPPORT THE COMMUNITY THROUGH EDUCATION. AIP TAKES A VERY PROACTIVE ROLE IN REGARD TO OPERATIONAL AND FINANCIAL MANAGEMENT. THIS CONSISTS OF ROUTINE REVIEWS OF THE ASSET BASE, OPERATIONAL NEEDS, AND KEY RISK FACTORS. THE RESULT OF THESE EFFORTS HAS LED TO DESIGNATION OF AIP'S NET ASSET BASE TO BEST ALIGN OUR RESOURCES IN SUPPORT OF OUR PROGRAMS AND TO MITIGATE KEY OPERATIONAL RISKS IN ACCORDANCE WITH THE MISSION OF THE ORGANIZATION. ALL DESIGNATIONS ARE REVIEWED ANNUALLY BY THE BOARD OF DIRECTORS AND ARE ADJUSTED BASED ON THE LATEST OPERATIONAL NEEDS AND RISK FACTORS. AIP ESTABLISHED THE FOLLOWING QUASI-ENDOWMENT FUNDS: GENERAL QUASI-ENDOWMENT - A BOARD DESIGNATED QUASI-ENDOWMENT CREATED FOR THE PURPOSE OF FUNDING AIP PROGRAM OPERATIONS. SUSTAINABILITY OF THE NIELS BOHR LIBRARY AND ARCHIVES AND THE CENTER FOR HISTORY OF PHYSICS - A QUASI-ENDOWMENT DESIGNATED BY THE BOARD OF DIRECTORS TO BEGIN A FUND TO SUPPORT THE OPERATIONS OF THE NIELS BOHR LIBRARY AND ARCHIVE AND CENTER OF HISTORY OF PHYSICS IN PERPETUITY.

SCHEDULE D, PART X, LINE 2:

THE AMERICAN INSTITUTE OF PHYSICS INCORPORATED HAS BEEN RECOGNIZED BY THE INTERNAL REVENUE SERVICE (IRS) AS TAX EXEMPT UNDER SECTION 501(A) AS AN ORGANIZATION DESCRIBED IN SECTION 501(C)(3) OF THE IRC, EXCEPT ON NET INCOME FROM UNRELATED BUSINESS ACTIVITIES (PRIMARILY ADVERTISING). AIP'S ACCOUNTING POLICY FOR EVALUATING UNCERTAIN TAX POSITIONS IS TO RECOGNIZE TAX POSITIONS IF IT IS MORE LIKELY THAN NOT THAT THE POSITION WOULD NOT BE SUSTAINED UPON EXAMINATION BY THE IRS. MANAGEMENT ANNUALLY REVIEWS ITS TAX POSITIONS AND HAS DETERMINED THAT THERE ARE NO MATERIAL UNCERTAIN TAX POSITIONS THAT REQUIRE RECOGNITION IN THE CONSOLIDATED FINANCIAL STATEMENTS. ON DECEMBER 31, 2023 AND 2022, A PROVISION OF $10,000 FOR STATE INCOME TAXES WAS RECORDED. AIP BELIEVES IT IS NO LONGER SUBJECT TO INCOME TAX EXAMINATIONS FOR YEARS PRIOR TO 2020.

Schedule D (Form 990) 2022

Additional Data

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Software Version:

- TIN:

SCHEDULE F(Form 990)

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

2023

Open to Public Inspection

Name of the organization
American Institute of Physics Inc

Employer identification number

13-1667053

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
	East Asia and the Pacific	1	6	Program Services	LIAISON OFFICE	1,076,385
	Europe (Including Iceland and Greenland)	0	0	Grantmaking		18,542
	East Asia and the Pacific	0	0	Grantmaking		3,450














3a	Sub-total ....	1	6			1,098,377
b	Total from continuation sheets to Part I ...
c	Totals (add lines 3a and 3b)	1	6			1,098,377

For Paperwork Reduction Act Notice, see the Instructions for Form 990.Cat. No. 50082W Schedule F (Form 990) 2023

Schedule F (Form 990) 2023

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) 2023

Schedule F (Form 990) 2023Page 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
EAST ASIA	East Asia and the Pacific	3	3,450
EUROPE	Europe (Including Iceland and Greenland)	8	18,542

Schedule F (Form 990) 2023

Page 4

Part IV

Foreign Forms

Schedule F (Form 990) 2023

Page 5

Part V

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

ReturnReference	Explanation
SCHEDULE F, PART I, LINE 2:	GRANTMAKERS EXPLANATION FOR MONITORING USE OF FUNDS OUTSIDE THE U.S: AIP HAS ESTABLISHED AND FOLLOWS DOCUMENTED POLICIES AND PROCEDURES TO MONITOR, EVALUATE AND REVIEW ALL TYPES OF GRANTS, AWARDS, AND ASSISTANCE ON A REGULAR BASIS.
SCHEDULE F, PART I, LINE 3F:	THE ACCOUNTING METHOD USED FOR THE EXPENDITURES SHOWN IS THE ACCRUAL BASIS.

Schedule F (Form 990) 2023

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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)

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 the latest information.

OMB No. 1545-0047

2023

Open to Public
Inspection

Name of the organization
American Institute of Physics Inc

Employer identification number
13-1667053

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	(h) Purpose of grant or assistance
(1) ACOUSTICAL SOCIETY OF AMERICA 1305 Walt Whitman Road Melville,NY11747	13-6161132	501(c)(3)	39,600	SEE PART IV
(2) AMERICAN ASSOC OF PHYSICISTS IN MEDICINE 1631 Prince Street Alexandria,VA22314	23-7057224	501(c)(3)	37,500	SEE PART IV
(3) AMERICAN ASSC OF PHYSICS TEACHERS 1 Physics Ellipse College Park,MD20740	52-0749775	501(c)(3)	10,000	SEE PART IV
(4) AMERICAN ASTRONOMICAL SOCIETY 1667 K Street NW Washington,DC20006	21-0735173	501(c)(3)	42,131	SEE PART IV
(5) AMERICAN CRYSTALLOGRAPHY ASSOC PO Box 96 Buffalo,NY14205	22-6075185	501(c)(3)	9,053	SEE PART IV
(6) AMERICAN METEOROLOGICAL SOCIETY 45 Beacon Street Boston,MA02108	04-2103657	501(c)(3)	115,352	SEE PART IV
(7) AMERICAN PHYSICAL SOCIETY 1 Physics Ellipse College Park,MD20740	13-1656610	501(c)(3)	41,723	SEE PART IV
(8) AMERICAN VACUUM SOCIETY 125 Maiden Lane New York,NY10038	04-2392373	501(c)(3)	40,600	SEE PART IV
(9) GEORGE WASHINGTON UNIVERSITY 2350 H St NW STE 102 Washington,DC20052	53-0196584	501(c)(3)	73,780	SEE PART IV
(10) LAMAR UNIVERSITY 4400 SML King Jr Pkwy Beaumont,TX77705	74-6000298	501(c)(3)	199,999	SEE PART IV
(11) MASS COLLEGE OF LIBERAL ARTS FND 375 Church Street North Adams,MA01247	04-2613803	501(c)(3)	110,351	SEE PART IV
(12) NORTH CAROLINA CENTRAL UNIVERSITY 1801 Fayetteville Street Durham,NC27707	56-6000730	501(c)(3)	200,000	SEE PART IV
(13) ROCHESTER INSTITUTE OF TECHNOLOGY 7 Lomb Memorial Drive Rochester,NY14626	16-0743140	501(c)(3)	199,661	SEE PART IV
(14) The Board of Trustees Univ of IL 506 S Wright Street Urbana,IL61801	37-6000511	501(c)(3)	199,944	SEE PART IV

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) 2023

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) AWARDS FOR ACHIEVEMENTS IN PHYSICS	14	70,500	FMV	PLAQUE
(2) CONGRESSIONAL & STATE DEPT FELLOWS	6	242,237
(3) DEIB WROKSHOPS	1	2,500
(4) RESEARCH FELLOWSHIPS	6	86,006
(5) SCHOLARSHIPS & AWARDS FOR SPS MEMBERS	161	168,614
(6) SCHOLARSHIPS TEAM-UP TOGETHER INITIATIVE	62	620,000
(6)
(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

SCHEDULE I, PART II, LINES 1-14:

1) Fund the summer research intern program 2) Increasing access to medical physics education 3) Collective action DEI 4) Engaging America in solar eclipses 5) Create educational video library 6) Equity assessment; Green meetings in a post covid world 7) Science trust project, Quality narration of conference presentations and Langmuir Prize outstanding research in chemistry and physics. 8) Concept development to expand vacuum technology course content in secondary education. 9) Housing for summer intern program 10) Fund the under advantaged Americans in southeast Texas becoming Lamar scholars of physics programs 11) Expanding expertise, championing excellence & leadership 12) Team-UP to excel with dream stem 13) Engage black and African students in the BS physics major in authentic leadership experiences 14) Establish a bridge for 2-year college students interested in physical science and engineering major at University of IL

SCHEDULE I, PART I, LINE 2:

PROCEDURE FOR MONITORING USE OF GRANTS IN THE U.S.: AIP HAS ESTABLISHED AND FOLLOWS DOCUMENTED POLICIES AND PROCEDURES TO MONITOR, EVALUATE AND REVIEW ALL TYPES OF GRANTS, AWARDS, AND ASSISTANCE ON A REGULAR BASIS.

Schedule I (Form 990) 2023

Additional Data

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Schedule J
(Form 990)

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

2023

Open to Public Inspection

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

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 .....

Yes

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) 2023

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)
1MICHAEL MOLONEY CEO	(i) (ii)	490,299 ------------- 0	100,938 ------------- 0	23,400 ------------- 0	33,000 ------------- 0	20,859 ------------- 0	668,496 ------------- 0	0 ------------- 0
2JAMES TAYLOR CHIEF FED OFFICER	(i) (ii)	191,270 ------------- 0	0 ------------- 0	675 ------------- 0	1,512 ------------- 0	12,895 ------------- 0	206,352 ------------- 0	0 ------------- 0
3CATHERINE SWARTZ CFAO	(i) (ii)	337,437 ------------- 0	78,833 ------------- 0	10,007 ------------- 0	33,000 ------------- 0	20,835 ------------- 0	480,112 ------------- 0	0 ------------- 0
4TRACY DENIEN AIPP, HEAD OF INFO TECHNOLOGY	(i) (ii)	196,115 ------------- 0	20,598 ------------- 0	16,930 ------------- 0	24,643 ------------- 0	45,336 ------------- 0	303,622 ------------- 0	0 ------------- 0
5DEAN SANDERSON AIPP, CHIEF STRATEGY OFFICER	(i) (ii)	345,597 ------------- 0	68,935 ------------- 0	9,989 ------------- 0	33,000 ------------- 0	35,727 ------------- 0	493,248 ------------- 0	0 ------------- 0
6ANN MICHAEL AIPP,Chief Transformation Ofcr	(i) (ii)	347,222 ------------- 0	75,836 ------------- 0	11,641 ------------- 0	33,000 ------------- 0	30,850 ------------- 0	498,549 ------------- 0	0 ------------- 0
7ALEXANDRA VANCE AIPP, CEO	(i) (ii)	462,209 ------------- 0	109,624 ------------- 0	23,400 ------------- 0	33,000 ------------- 0	45,336 ------------- 0	673,569 ------------- 0	0 ------------- 0
8ROY LEVENSON AIPP, CFO	(i) (ii)	342,285 ------------- 0	106,422 ------------- 0	12,526 ------------- 0	33,000 ------------- 0	24,414 ------------- 0	518,647 ------------- 0	0 ------------- 0
9KEVIN STEINER AIPP, HEAD OF GLOBAL SALES	(i) (ii)	195,060 ------------- 0	50,287 ------------- 0	900 ------------- 0	25,758 ------------- 0	28,144 ------------- 0	300,149 ------------- 0	0 ------------- 0
10SCOTT MONTGOMERY CHIEF CONTENT OFFICER	(i) (ii)	257,426 ------------- 0	0 ------------- 0	900 ------------- 0	18,500 ------------- 0	584 ------------- 0	277,410 ------------- 0	0 ------------- 0
11PENELOPE DONHAUSER AIPP, CHIEF PUBLISHING OFFICER	(i) (ii)	287,851 ------------- 0	50,978 ------------- 0	1,749 ------------- 0	33,000 ------------- 0	2,672 ------------- 0	376,250 ------------- 0	0 ------------- 0
12MADELINE SUTTON AIPP, HEAD OF PEOPLE & CULTURE	(i) (ii)	187,801 ------------- 0	23,606 ------------- 0	900 ------------- 0	22,720 ------------- 0	27,084 ------------- 0	262,111 ------------- 0	0 ------------- 0
13MELISSA ANNE SCHELD AIPP, SENIOR SALES MANAGER	(i) (ii)	123,852 ------------- 0	122,642 ------------- 0	900 ------------- 0	25,033 ------------- 0	12,694 ------------- 0	285,121 ------------- 0	0 ------------- 0
14SHERRY RENDER CONTROLLER & DIR OF FINANCE	(i) (ii)	206,667 ------------- 0	4,246 ------------- 0	900 ------------- 0	22,079 ------------- 0	20,419 ------------- 0	254,311 ------------- 0	0 ------------- 0
15LIZ DART CARON CHIEF OF STAFF	(i) (ii)	202,097 ------------- 0	407 ------------- 0	900 ------------- 0	20,153 ------------- 0	584 ------------- 0	224,141 ------------- 0	0 ------------- 0
16SARA GIRARD AIPP, HEAD OF MKT AND COMM	(i) (ii)	213,363 ------------- 0	24,911 ------------- 0	900 ------------- 0	24,562 ------------- 0	28,730 ------------- 0	292,466 ------------- 0	0 ------------- 0

Schedule J (Form 990) 2023

Page 3

Part III

Supplemental Information

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

Return Reference

Explanation

SCHEDULE J, PART I, LINE 1A:

GROSS-UP PAYMENTS - IF AN EMPLOYEE REACHES THE IRS LIMITATION FOR EMPLOYER RETIREMENT CONTRIBUTIONS, THE ORGANIZATION PROVIDES A GROSS UP PAYMENT EQUIVALENT TO THE DIFFERENCE BETWEEN THE MAX AMOUNT AND THE AMOUNT THAT WOULD HAVE BEEN CONTRIBUTED IF THERE WERE NO LIMITATIONS.

SCHEDULE J, PART I, LINE 3:

COMPENSATION REVIEW & APPROVAL PROCESS: CEO: AIP'S BOARD OF DIRECTORS HAS DESIGNATED A COMPENSATION COMMITTEE TO MANAGE COMPENSATION OF AIP'S CEO. THE CHARTER OF THE COMPENSATION COMMITTEE PROVIDES FOR A PROCEDURE THAT IS CONSISTENT WITH APPLICABLE LAW AND BEST PRACTICES. THE CHARTER PROVIDES THAT THE COMMITTEE "SHALL MAKE A RECOMMENDATION TO THE BOARD OF DIRECTORS WITH RESPECT TO THE COMPENSATION FOR THE CHIEF EXECUTIVE OFFICER." THE COMPENSATION COMMITTEE OBTAINS DATA AS TO COMPARABLE COMPENSATION FOR THE CHIEF EXECUTIVE OFFICER, RECOMMENDS TERMS OF THE CEO'S EMPLOYMENT AGREEMENTS, AND DETERMINES REASONABLE COMPENSATION LEVEL. THE COMMITTEE SUBMITS TO THE BOARD A RECOMMENDATION FOR THE CEO'S COMPENSATION FOR EACH FISCAL YEAR. THE BOARD OF DIRECTORS MAKES THE FINAL DECISION ON THE CEO'S COMPENSATION.

Schedule J (Form 990) 2023

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE O
(Form 990)

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 the latest information.

OMB No. 1545-0047

2023

Open to Public
Inspection

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

Return Reference	Explanation
FORM 990, PART III, LINE 1:	AIP advances the physical sciences with a unifying voice of strength from diversity. With the mission of benefiting humanity through the physical sciences, AIP is both a federation and an institute. As a federation, AIP helps its Member Societies leverage their diverse expertise and contributions in advancing the physical sciences in the research enterprise, in the economy, in education and in society. Through their shared goals and partnership with AIP, Member Societies broaden their impact and achieve results beyond their individual missions and mandates. AIP also acts as an independent institute whose journalism, research, history, and student programs enrich the discipline of the physical sciences. Together, AIP and its Member Societies form a unified community that includes stakeholders in government, academia, the nonprofit and private sectors, the student and teacher communities and the public.
FORM 990, PART III, LINE 4A:	PROGRAM SERVICES: AIP PUBLISHING LLC (AIPP) IS A SINGLE MEMBER, LIMITED LIABILITY COMPANY OWNED BY THE AMERICAN INSTITUTE OF PHYSICS (AIP). AIPP IS A SCHOLARLY PUBLISHER IN THE PHYSICAL AND RELATED SCIENCES, PROVIDING THE GLOBAL SCIENCE COMMUNITY WITH A COMPREHENSIVE COLLECTION OF CITED, PEER-REVIEWED SCIENTIFIC PAPERS AND OTHER INFORMATION. ACCESSED BY RESEARCHERS AT NEARLY 4,000 INSTITUTIONS WORLDWIDE, AIPP'S PORTFOLIO OF 39 JOURNALS INCLUDES PRESTIGIOUS TITLES SUCH AS APPLIED PHYSICS LETTERS, JOURNAL OF APPLIED PHYSICS, PHYSICS OF FLUIDS, THE JOURNAL OF CHEMICAL PHYSICS, AND THE AIP CONFERENCE PROCEEDINGS. AIPP SUPPORTS THE SCIENTIFIC AND EDUCATIONAL MISSION OF AIP THROUGH ITS SCHOLARLY PUBLISHING ACTIVITIES AND ALSO WORKS WITH SEVERAL OF AIP'S MEMBER SOCIETIES AND OTHER PUBLISHING PARTNERS TO HELP ADVANCE THEIR PUBLISHING MISSION. PHYSICS TODAY, AIP'S FLAGSHIP PUBLICATION, PROVIDES A UNIFYING INFLUENCE FOR THE PHYSICAL SCIENCES THROUGH ITS BROAD AND AUTHORITATIVE COVERAGE OF SCIENTIFIC RESEARCH, NEWS, AND OPINIONS OF RELEVANCE TO THE GLOBAL SCIENTIFIC COMMUNITY. THE MONTHLY MAGAZINE IS RECEIVED BY THE INDIVIDUAL MEMBERS OF AIP'S 10 CONSTITUENT SOCIETIES, LIBRARIES AND INSTITUTIONS AROUND THE WORLD, AND OTHER INTERESTED INDIVIDUALS. PHYSICS TODAY PUBLISHES ADDITIONAL NEWS, REVIEWS, AND COMMENTARY ON ITS WEBSITE, WHICH GETS NEARLY 140 THOUSAND PAGEVIEWS A MONTH. PHYSICS TODAY ALSO HAS A STRONG PRESENCE ON SOCIAL MEDIA, WITH NEARLY 3 MILLION FOLLOWERS ON FACEBOOK AND MORE THAN 500 THOUSAND ON X.
FORM 990, PART III, LINE 4B:	AIP PROGRAMS: IN KEEPING WITH ITS MISSION TO ADVANCE, PROMOTE AND SERVE THE PHYSICAL SCIENCES FOR THE BENEFIT OF HUMANITY, AIP OFFERS UNIQUE SERVICES, PRODUCTS, AND EXPERTISE IN: EDUCATION AND STUDENT SERVICES, HISTORY OF PHYSICS, ARCHIVES AND LIBRARY, MEDIA AND GOVERNMENT RELATIONS, MAGAZINE PUBLISHING AND EMPLOYMENT SERVICES FOR SCIENCE AND ENGINEERING PROFESSIONALS, STATISTICAL RESEARCH, AND INDUSTRY OUTREACH. WITH THE PURPOSE OF PROMOTING THE PROGRESS AND RELEVANCE OF THE PHYSICAL SCIENCES AND TO ADVANCE THEIR CONTRIBUTIONS AND RESPONSIVENESS TO SOCIETY, AIP GENERATES, COMMUNICATES, AND POPULARIZES KNOWLEDGE, UNIQUE EXPERTISE, AND AUTHORITATIVE INFORMATION. THE SOCIETY OF PHYSICS STUDENTS (SPS) IS A SCIENTIFIC SOCIETY FOR PHYSICS AND ASTRONOMY UNDERGRADUATES AND THEIR MENTORS, WITH MORE THAN 6,000 MEMBERS SPREAD OVER MORE THAN 850 CHAPTERS NATIONWIDE AND 35 INTERNATIONAL CHAPTERS. SPS EXISTS TO SUPPORT UNDERGRADUATE STUDENTS INTERESTED IN PHYSICS AND ASTRONOMY, PROMOTING INCLUSIVITY AND COLLEGIALITY, SUPPORTING PHYSICS AND ASTRONOMY DEPARTMENTS, AND REACHING OUT IN SERVICE TO THE BROADER COMMUNITY. SIGMA PI SIGMA, THE PHYSICS AND ASTRONOMY HONOR SOCIETY, RECOGNIZES OUTSTANDING SCHOLARS IN PHYSICS AND ASTRONOMY, ENCOURAGES INTEREST IN THE FIELD, AND PROMOTES AN ATTITUDE OF SERVICE AMONG ITS OVER 80,000 LIFE-LONG MEMBERS AND 593 CHAPTERS TOWARDS THE ENTIRE PHYSICS AND ASTRONOMY COMMUNITY AND THE PUBLIC. SIGMA PI SIGMA PROVIDES A NETWORK OF PEOPLE SPANNING FROM UNDERGRADUATE AND GRADUATE STUDENTS THROUGH RETIRED PROFESSIONALS. THE CONNECTION OF ALUMNI WITH CURRENT STUDENTS PROVIDES RICH OPPORTUNITIES FOR SUPPORT OF BOTH STUDENTS AND DEPARTMENTS. THE SOCIETY OF PHYSICS STUDENTS AND SIGMA PI SIGMA PROVIDE ENRICHING EXPERIENCES FOR STUDENTS INTERESTED IN THE PHYSICAL SCIENCES THROUGH INTERNSHIPS, SCHOLARSHIPS, FELLOWSHIPS, AND STUDENT PROGRAMS AT SCIENTIFIC MEETINGS - OPPORTUNITIES THAT ARE VITAL TO THE PROFESSIONAL DEVELOPMENT OF ALL UNDERGRADUATE PHYSICS AND ASTRONOMY STUDENTS. THE HISTORY PROGRAMS OF THE AMERICAN INSTITUTE OF PHYSICS ENSURE THAT THE HERITAGE OF THE PHYSICAL SCIENCES IS SAFEGUARDED AND THAT THE PUBLIC CAN UNDERSTAND HOW THE PHYSICAL SCIENCES HAVE BEEN CENTRAL TO THE HISTORY OF THE MODERN WORLD. THE HISTORY OF THE PHYSICAL SCIENCES OFFERS A RICH FRAMEWORK OF EXCITING PAST ACHIEVEMENTS AND VALUABLE GUIDANCE FOR CURRENT AND FUTURE GENERATIONS. "TO PRESERVE AND MAKE KNOWN THE HISTORY OF PHYSICAL SCIENCES" IS THE MISSION SHARED BY THE CENTER FOR HISTORY OF PHYSICS (CHP) AND THE NIELS BOHR LIBRARY & ARCHIVES (NBL&A). THE CORE ACTIVITIES OF CHP INCLUDE LOCATING AND PRESERVING PRIMARY SOURCE MATERIAL, SUPPORTING THE PRODUCTION OF HISTORY OF THE PHYSICAL SCIENCES, AND BRINGING THIS HISTORY TO A WIDE AUDIENCE. CHP HELPS WITH SOURCES MAINLY IN COLLABORATION WITH NBL&A AND THROUGH ORAL HISTORY INTERVIEWS, AN IMMEDIATE AND PERSONAL TESTIMONY TO SCIENCE IN PASSING GENERATIONS. WE SUPPORT HISTORICAL WRITING THROUGH GRANTS IN-AID AND THE HELLEMAN FELLOWSHIPS, AS WELL AS THROUGH THE EARLY CAREER CONFERENCE AND OUR SUPPORT OF EMERGING SCHOLARS. WE SUPPORT EDUCATION AND ENGAGEMENT ABOUT THE HISTORY OF THE PHYSICAL SCIENCES THROUGH OUR TEACHING GUIDES AND HISTORY OF SCIENCE EXHIBITS. CHP ALSO SPONSORS A PUBLIC LECTURE SERIES, THE LYNE STARLING TRIMBLE SCIENCE HERITAGE PUBLIC LECTURES. THE CENTER FOR HISTORY OF PHYSICS ENVISIONS AN EVEN MORE ACTIVE RESEARCH INSTITUTE IN THE FUTURE, WITH A MORE VIBRANT COMMUNITY OF HISTORIANS AND OTHER SCHOLARS, ALL WORKING TO BRING A GREATER UNDERSTANDING OF THE PHYSICAL SCIENCES TO K-12 SCHOOL AUDIENCES AND THE BROADER PUBLIC. THE NIELS BOHR LIBRARY & ARCHIVES DOCUMENTS THE HISTORY OF AIP AND OTHER SCIENTIFIC INSTITUTIONS BY COLLECTING INSTITUTIONAL RECORDS AND OTHER PRIMARY RESOURCES THAT DETAIL THE ACTIVITIES OF THE ORGANIZATIONS AND HIGHLIGHT THE ROLES THAT THESE INSTITUTIONS PLAY IN THE WORLD AT LARGE, CAPTURING HOW SCIENTIFIC INSTITUTIONS PARTICIPATE IN GLOBAL MOVEMENTS LIKE SOCIAL INJUSTICES, INCLUSION, GLOBAL WARMING, AND PANDEMIC RESPONSE. THE NBL&A ALSO PRESERVES ORAL HISTORY INTERVIEWS, PHOTOGRAPHS AND MEDIA, BOOKS, JOURNALS, AND OTHER PUBLISHED MATERIALS PERTAINING TO THE HISTORY OF THE PHYSICAL SCIENCES. IN RECENT YEARS, THE NBL&A HAS BROADENED THE SCOPE OF THE COLLECTIONS TO INCLUDE OLDER MATERIALS AND RARE BOOKS, DATING BACK TO THE 16TH AND 17TH CENTURIES, IN TOPICS THAT FORM THE FOUNDATION OF MODERN SCIENCE. LOOKING TO THE FUTURE, THE NBL&A STRIVES TO SERVE AND CONNECT WITH OUR RESEARCH COMMUNITY THROUGH INCREASED OUTREACH AND PROMOTION OF OUR RESOURCES AND GLOBAL ACCESS TO OUR COLLECTIONS THROUGH STRATEGIC DIGITIZATION AND REMOTE ACCESS TO SELECTED MATERIALS. THE AIP MEDIA SERVICES TEAM WORKS WITH AIP PUBLISHING, AIP'S MEMBER SOCIETIES, AND ALLIED ORGANIZATIONS TO PRODUCE AND PROMOTE TIMELY, ACCURATE PUBLIC DISSEMINATION OF SCIENTIFIC ADVANCES AND KNOWLEDGE. MEDIA SERVICES STAFFS PRESS ROOMS, ORGANIZES PRESS CONFERENCES AND PRODUCES HUNDREDS OF WRITTEN STORIES, AND OTHER FORMS OF PUBLIC INFORMATION FOR THE PHYSICAL SCIENCES COMMUNITY, MEDIA, AND GENERAL PUBLIC EVERY YEAR. AIP STATISTICAL RESEARCH, PART OF AIP RESEARCH, COLLECTS AND DISSEMINATES RELIABLE AND TIMELY DATA ON EDUCATION, CAREERS, AND DIVERSITY IN PHYSICAL SCIENCES. DATA ARE PUBLISHED IN THE AREAS OF ENROLLMENT, DEGREES, DEMOGRAPHICS, REPRESENTATION OF WOMEN AND MINORITIES, EMPLOYMENT BY ECONOMIC SECTOR, AND SALARY INFORMATION FOR PHYSICS AND ASTRONOMY BACHELOR'S, MASTER'S AND PHD HOLDERS. AIP STATISTICAL RESEARCH ALSO PROVIDES SURVEY EXPERTISE AND CONTRACTS WITH MEMBER SOCIETIES AND OUTSIDE ORGANIZATIONS TO CARRY OUT TARGETED STUDIES. AIP'S CENTENARY FEDERATION AND DIVERSITY ACTION FUND USES A PORTION OF AIP'S STRATEGIC RESERVES AS A BOARD-DESIGNATED FUND, TO ADVANCE THE SUCCESS OF ITS MEMBER SOCIETIES THROUGH ITS VENTURE GRANTS PROGRAM AND COLLECTIVE ACTION ACTIVITIES, AND TO SUPPORT DIVERSITY IN THE PHYSICAL SCIENCES. THE VENTURE GRANTS PROGRAM FUNDS INNOVATIVE PROJECTS OF ONE OR MORE MEMBER SOCIETIES. AIP AFFILIATES MAY ALSO PARTNER WITH MEMBER SOCIETIES ON VENTURE GRANT PROJECTS. FOR A MEMBER SOCIETY TO RECEIVE THIS GRANT, THE SOCIETY MUST SUBMIT A PROPOSAL TO THE VENTURE GRANT ADVISORY COMMITTEE. THE COMMITTEE, MADE UP OF INDEPENDENT MEMBERS, PERFORMS A THOROUGH REVIEW OF SUBMISSIONS AND MAKES INDEPENDENT RECOMMENDATIONS TO MANAGEMENT ON THE DISTRIBUTION OF THE GRANTS. AIP CONTINUES TO INVEST IN DIVERSITY, EQUITY, AND INCLUSION ACROSS THE INSTITUTE TO HELP FOSTER INCLUSIVE AND WELCOMING ENVIRONMENTS SO ANYONE WHO IS INTERESTED IN THE PHYSICAL SCIENCES CAN PERSIST IN THEIR EDUCATIONAL AND PROFESSIONAL JOURNEY. In January 2020, the Task Force to elevate those unrepresented students who lack opportunities and face obstacles in undergraduate physics and astronomy (TEAM-UP) RELEASED ITS GROUNDBREAKING REPORT, "THE TIME IS NOW: SYSTEMIC CHANGES TO INCREASE AFRICAN AMERICANS WITH BACHELOR'S DEGREES IN PHYSICS AND ASTRONOMY". RECOGNIZING THE IMPORTANCE OF BOTH RESEARCH AND ACTION, AIP DEDICATED FULL-TIME STAFF TO PROMOTE AND ADVANCE THE TEAM-UP REPORT RECOMMENDATIONS WITHIN THE PHYSICS AND ASTRONOMY ACADEMIC COMMUNITIES AND ASSEMBLED A COMMITTEE OF EXPERTS TO ORGANIZE IMPLEMENTATION WORKSHOPS AIMED AT HELPING THESE DEPARTMENTS CREATE ACTION PLANS AND ENVIRONMENTS WHERE STUDENTS CAN THRIVE. TO BUILD ON THE RESEARCH FROM THE TEAM-UP REPORT AND IMPLEMENTATION WORKSHOPS, THE TEAM-UP TOGETHER INITIATIVE WAS LAUNCHED WITH THE PURPOSE TO SUPPORT AND INSPIRE A BROADER COMMUNITY OF EDUCATORS, FUNDERS, POLICYMAKERS, SCIENTISTS, AND OTHERS TO ADDRESS SYSTEMIC CHANGE AND CREATE A CULTURE OF INCLUSION, SUPPORT, AND SUCCESS IN PHYSICS AND ASTRONOMY DEPARTMENTS. AIP ESTABLISHED A JOINT AWARD WITH THE NATIONAL SOCIETY OF BLACK PHYSICISTS, THE AIP-NSBP JOSEPH A. JOHNSON II AWARD, WHICH HONORS DR. JOHNSON'S LEGACY AS A PIONEERING EXPERIMENTAL PHYSICIST,COFOUNDER OF NSBP, AND INSPIRATIONAL MENTOR TO COUNTLESS BLACK STUDENTS. AIP PARTNERED WITH THE #BLACKINPHYSICS ORGANIZERS TO SPOTLIGHT BLACK PHYSICISTS - THEIR STORIES AND THEIR CONTRIBUTIONS TO SCIENCE AND SOCIETY. OUR FLAGSHIP PUBLICATION, PHYSICS TODAY, CREATED A #BLACKINPHYSICS WEEK ESSAY SERIES AS PART OF THAT PARTNERSHIP AND EACH YEAR DRAWS ATTENTION TO ISSUES AFFECTING WOMEN, LGBTQAI+ PEOPLE, PEOPLE WITH DISABLITIES AND PEOPLE OF COLOR IN THE PHYSICAL SCIENCES. IN 2022, AIP ESTABLISHED THE DIVERISTY, EQUITY, INCLUSION, BELONGING AND ACCESSIBILITY (DEIBA) WORKGROUP CONSISTING OF NINE MEMBER SOCIETIES. THE PURPOSE OF THIS GROUP IS TO DEVELOP A DEIBA STRATEGIC PLAN TO ADVANCE THE MEMBER SOCIETIES' DEIBA INITIATIVES AND PROGRAMS, AS WELL AS PROVIDE GUIDANCE ON PRIORITIZING STRATEGIES, AND CHAMPIONING IMPLEMENTATION EFFORTS. THE PURPOSE OF THE DEIBA STRATEGIC PLAN IS TO SUPPORT AIP'S MISSION TO "ADVANCE, PROMOTE, AND SERVE THE PHYSICAL SCIENCES FOR THE BENEFIT OF HUMANITYTO SUPPORT THE WORK OF THE MEMBER SOCIETIES AND FEDERATION AT LARGE TO ADVANCE DEIBA IN THE PHYSICAL SCIENCES COMMU
FORM 990, PART III, LINE 4B CONTINUATION:	TEAM-UP Together is a collective action initiative to drive systemic change, improve educational outcomes, and create a culture of inclusion, support, and success for students, including African American students, who face unequal opportunities and obstacles toward their success in physics and astronomy (P&A) departments. The initiative has two main components. Student Program: This program provides direct funding to physics and astronomy students and is administered through the Society of Physics Students (SPS). THIS PROGRAM ALSO AIMS TO PROVIDE ADDITIONAL SUPPORTS TO STUDENTS THROUGH MENTORING, RESEARCH AND INTERNSHIP OPPORTUNITIES, AND CONNECTION AND OPPORTUNITIES TO CONVENE AT MEETINGS AND CONFERENCES TO SUPPORT THEIR PROFESSIONAL DEVELOPMENT. IN 2023, TU-T AWARDED 62 SCHOLARSHIPS IN THE AMOUNT OF $10,000 EACH, REPRESENTING 51 SCHOOLS ACROSS THE UNITED STATES. Department Program: The Excellence and Leadership (EXCEL) grant program addresses systemic change by providing funding for physics and astronomy departments to launch innovative efforts and programs that drive systemic change and prioritize and support successful outcomes for underserved students, including African American undergraduates. In 2023, AIP awarded approximately $1M in funding to five academic departments to implement two-year projects. AIP FURTHER SUPPORTED THE PHYSICS AND ASTRONOMY COMMUNITY TO MEET PROGRAM GOALS BY LAUNCHING A DIGITAL EXPERIENCE PLATFORM TO ENGAGE AND INFORM STAKEHOLDERS, HOSTED TWO COMMUNITY EVENTS FOR STUDENTS, HOSTED AN INFORMATIONAL WEBINAR AND MULTIPLE LISTENING SESSIONS TO INFORM PROGRAM DEVELOPMENT, AND GAVE NUMEROUS PRESENTATIONS TO AMPLIFY THE PROGRAM. AIP ALSO FORMALIZED AN EXPERT ADVISORY COMMITTEE TO PROVIDE GUIDANCE AND ADVICE ON THE OVERALL TEAM-UP EFFORT, ASSURING ALIGNMENT TO THE TEAM-UP REPORT AND RECOMMENDATIONS, AND ADVISES ON REACHING THE PROGRAM'S OVERARCHING GOAL. TO ADDRESS ONE OF AIP'S STRATEGIC PRIORITIES, THE DIVERSITY, EQUITY, AND BELONGING OFFICE CREATED A DEIBA+ STRATEGIC PLAN THAT WAS FORMALLY LAUNCHED IN MARCH 2024. THE PURPOSE OF THIS PLAN IS TO SUPPORT AIP'S MISSION AND TO SUPPORT THE WORK OF THE FEDERATION TO ADVANCE DEIBA+ IN THE PHYSICAL SCIENCE COMMUNITY. THE PLAN BUILDS UPON AIP'S EXISTING PROGRAMMATIC EFFORTS TO IMPROVE DIVERSITY AND CREATE A CULTURE OF INCLUSION AND BELONGING AND INCREASE VISIBILITY OF AIP AS A DEIBA+ LEADER. THE PLAN REPRESENTS THE COLLECTIVE THINKING OF THE MEMBER SOCIETIES, IN PARTICULAR THE ACTIONS NEEDED TO BE TAKEN BY AIP TO SUPPORT THE FEDERATION. THE PURPOSE OF THIS STRATEGIC PLAN IS TO DRIVE CHANGE, DISMANTLE SYSTEMATIC BARRIERS, AND BUILD EQUITY CAPITAL IN SUPPORT OF ADVANCING MEMBER SOCIETIES AND AIP'S DEIBA+ WORK. AIP JOINS OTHER ORGANIZATIONS AS A PARTNER FOR THE STEMM OPPORTUNITY ALLIANCE (SOA). THE SOA AIMS TO ADDRESS KEY AREAS TO ATTAIN FUNDAMENTAL, SYSTEMATIC CHANGE AND ENSURE THE DIVERSITY THAT IS NECESSARY FOR THE INCREASED PERFORMANCE AND INNOVATIVE IDEAS THAT ARE NEEDED TO KEEP THE UNITED STATES COMPETITIVE. THE TEAM-UP TOGETHER INITIATIVE AND THE DEIBA STRATEGIC PLAN ARE LISTED AS ONE OF THE 'MODEL' PROGRAMS ALIGNED WITH SOA GOALS. AIP PARTNERED WITH THE #BLACKINPHYSICS ORGANIZERS TO SPOTLIGHT BLACK PHYSICISTS - THEIR STORIES AND THEIR CONTRIBUTIONS TO SCIENCE AND SOCIETY. OUR FLAGSHIP PUBLICATION, PHYSICS TODAY, CREATED A #BLACKINPHYSICS WEEK ESSAY SERIES AS PART OF THAT PARTNERSHIP AND EACH YEAR DRAWS ATTENTION TO ISSUES AFFECTING WOMEN, LGBTQAI+ PEOPLE, PEOPLE WITH DISABILITIES AND PEOPLE OF COLOR IN THE PHYSICAL SCIENCES. AIP JOINS WITH OTHER SCIENTIFIC ORGANIZATIONS TO CONDEMN VIOLENCE AGAINST COMMUNITIES OF COLOR AND JOINS THE CEO ACTION FOR RACIAL EQUITY INITIATIVE AS PART OF THE CEO ACTION FOR DIVERSITY & INCLUSION ORGANIZATION. AIP CONTINUES TO BE A MEMBER OF THE SOCIETIES CONSORTIUM ON SEXUAL HARASSMENT IN STEMM, WHICH PUSHES FOR EXCELLENCE IN STEMM FIELDS AND FOR ADDRESSING ISSUES OF SEXUAL HARASSMENT.
FORM 990, PART VI, LINE 6:	EXPLANATION OF CLASSES OF MEMBERS OR SHAREHOLDERS: AIP IS A NON-STOCK, NON-PROFIT MEMBER CORPORATION.
FORM 990, PART VI, LINE 7A:	HOW MEMBERS OF SHAREHOLDERS ELECT GOVERNING BOARD: THE BOARD OF DIRECTORS IS COMPOSED OF THE FOLLOWING INDIVIDUALS: ONE (1) INDIVIDUAL IS ELECTED OR APPOINTED BY EACH MEMBER (A MEMBER SOCIETY DIRECTOR); NOT FEWER THAN TWO (2) AND NOT MORE THAN FOUR (4) INDIVIDUALS, AS THE BOARD OF DIRECTORS SHALL DETERMINE, ELECTED BY THE BOARD OF DIRECTORS (THE AT LARGE DIRECTORS); THE CHAIR OF THE BOARD OF DIRECTORS, THE CORPORATE SECRETARY, the treasurer AND THE CHIEF EXECUTIVE OFFICER, EX-OFFICIO (THE EX-OFFICIO DIRECTORS).
FORM 990, PART VI, LINE 7B:	THE MEMBER SOCIETIES ARE NOT OFTEN CALLED UPON TO TAKE ACTION IN THEIR ROLE AS THE VOTING MEMBERS OF AIP. RESPONSIBILITIES OF THE MEMBER SOCIETIES INCLUDE: -APPOINTING MEMBER SOCIETY DIRECTORS TO THE AIP BOARD, OR THEIR RE-APPOINTMENT FOR A SECOND TERM. -ADMITTING NEW MEMBER SOCIETIES TO THE FEDERATION. -MAKING A FINAL DECISION IN THE EVENT THAT AIP EVER CONSIDERS A FUNDAMENTAL CHANGE IN ITS STRUCTURE SUCH AS A MERGER, CONSOLIDATION, DISSOLUTION OR SALE OF SUBSTANTIALLY ALL OF ITS ASSETS.
FORM 990, PART VI, LINE 11B:	FORM 990 REVIEW PROCESS: THE FORM 990 IS PREPARED AND REVIEWED BY THE ORGANIZATION'S INDEPENDENT ACCOUNTING FIRM WITH THE ASSISTANCE OF AIP'S MANAGEMENT. THE FORM 990 IS THEN REVIEWED BY THE AUDIT COMMITTEE AND THEN MADE AVAILABLE TO ALL MEMBERS OF THE BOARD OF DIRECTORS PRIOR TO FILING.
FORM 990, PART VI, LINE 12C:	THE CONSOLIDATED AIP CONSISTS OF THE PARENT CORPORATION (AIP) and ITS WHOLLY OWNED SUBSIDIARY AIP PUBLISHING LLC (AIPP). DUE TO THE NATURE OF THE RELATIONSHIP BETWEEN AIP AND AIPP, EACH ORGANIZATION MAINTAINS AND MANAGES ITS OWN CONFLICT OF INTEREST (COI) POLICY. AT AIP, ANNUALLY, A CONFLICT OF INTEREST (COI) DISCLOSURE IS COMPLETED BY ALL AIP COVERED PERSONS (OFFICERS, DIRECTORS, AND KEY PERSONS). NO AIPP EMPLOYEES ARE AIP COVERED PERSONS. THE CHAIR OF THE AUDIT COMMITTEE AND THE CORPORATE SECRETARY REVIEW THE DISCLOSURES, EVALUATE IF THERE ARE CONFLICTS OF INTEREST THAT NEED TO BE MANAGED, AND REPORT THEIR FINDINGS TO THE AUDIT COMMITTEE. THE AUDIT COMMITTEE THEN DETERMINES THE NEXT STEPS WITH RESPECT TO MANAGING ANY CONFLICTS OF INTEREST. THE FINAL RESULTS OF THE DISCLOSURE REVIEWS AND ANY MANAGEMENT PLANS ARE REPORTED TO INDIVIDUAL DIRECTORS AND TO THE BOARD. AIP'S COI POLICY IS MADE AVAILABLE TO THE PUBLIC THROUGH AIP'S WEBSITE. AT AIPP, ANNUALLY, ALL MEMBERS OF THE BOARD OF MANAGERS AND ALL OFFICERS OF THE COMPANY CONFIRM THAT THEY HAVE READ, UNDERSTAND, AND AGREE TO COMPLY WITH AIPP'S COI POLICY. ALL OTHER AIPP EMPLOYEES ARE NOT REQUIRED TO CONFIRM ANNUALLY. THE CFO OF AIPP CERTIFIES ANNUALLY TO THE CFAO OF AIP THAT AIPP IS REGULARLY AND CONSISTENTLY MONITORING AND ENFORCING COMPLIANCE WITH THE AIPP COI POLICY. AIPP DOES NOT MAKE ITS COI POLICY AVAILABLE TO THE PUBLIC.
FORM 990, PART VI, LINE 15A:	CEO: AIP'S BOARD OF DIRECTORS HAS DESIGNATED A COMPENSATION COMMITTEE TO MANAGE COMPENSATION OF AIP'S CEO. THE CHARTER OF THE COMPENSATION COMMITTEE PROVIDES FOR A PROCEDURE THAT IS CONSISTENT WITH APPLICABLE LAW AND BEST PRACTICES. THE CHARTER PROVIDES THAT THE COMMITTEE SHALL MAKE A RECOMMENDATION TO THE BOARD OF DIRECTORS WITH RESPECT TO THE COMPENSATION FOR THE CHIEF EXECUTIVE OFFICER. THE COMPENSATION COMMITTEE OBTAINS DATA AS TO COMPARABLE COMPENSATION FOR THE CHIEF EXECUTIVE OFFICER, RECOMMENDS TERMS OF THE CEO'S EMPLOYMENT AGREEMENT AND DETERMINES REASONABLE COMPENSATION LEVEL. THE COMMITTEE SUBMITS TO THE BOARD A RECOMMENDATION FOR THE CEO'S COMPENSATION FOR EACH FISCAL YEAR. THE BOARD OF DIRECTORS MAKES THE FINAL DECISION ON THE CEO'S COMPENSATION.
FORM 990, PART VI, LINE 15B:	COMPENSATION REVIEW AND APPROVAL PROCESS: OFFICERS: A COMPENSATION CONSULTING FIRM IS RETAINED TO PERIODICALLY REVIEW THE COMPENSATION RANGES OF THE OFFICERS. THE CHIEF TALENT & CULTURE OFFICER PRESENTS THIS INFORMATION TO THE COMPENSATION COMMITTEE FOR INFORMATION PURPOSES ONLY.
FORM 990, PART VI, LINE 19:	OTHER ORGANIZATION DOCUMENTS MADE AVAILABLE TO THE PUBLIC: THE AIP WEBSITE HAS A GOVERNANCE SECTION THAT INCLUDES CORPORATION BYLAWS. ALSO ON THE WEBSITE ARE ANNUAL REPORTS THAT INCLUDE FINANCIAL HIGHLIGHTS FOR AIP. THE ORGANIZATION'S CONFLICT OF INTEREST POLICY AND FORM 990 ARE ALSO AVAILABLE ON THE WEBSITE.
FORM 990, PART XI, LINE 9:	OTHER CHANGES IN NET ASSETS OR FUND BALANCES: FASB ADOPTION POST-RETIREMENT MEDICAL PLAN: $-42,347 --------- $-42,347
FORM 990, PART XII, LINE 2C:	AIPP PRODUCES A SINGLE AUDIT REPORT PREPARED BY THE SAME AUDIT FIRM USED BY AIP. THE SINGLE AUDIT REPORT IS INCORPORATED INTO THE CONSOLIDATED STATEMENTS OF AIP.

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

Cat. No. 51056K

Schedule O (Form 990) 2023

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE R
(Form 990)

Department of the Treasury
Internal Revenue Service

Related Organizations and Unrelated Partnerships

Complete if the organization answered "Yes" on Form 990, Part IV, line 33, 34, 35b, 36, or 37.
Attach to Form 990.
Go to www.irs.gov/Form990 for instructions and the latest information.

OMB No. 1545-0047

2023

Open to Public Inspection

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

Part I

Identification of Disregarded Entities. Complete if the organization answered "Yes" on Form 990, Part IV, line 33.

(a) Name, address, and EIN (if applicable) of disregarded entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Total income	(e) End-of-year assets	(f) Direct controlling entity
(1) AIP PUBLISHING LLC 1305 WALT WHITMAN RD STE 110 MELVILLE,NY11747 46-1881138	PUBLISHING	NY	70,247,000	65,264,000	AIP

Part II

Identification of Related Tax-Exempt Organizations. Complete if the organization answered "Yes" on Form 990, Part IV, line 34 because it had one or more related tax-exempt organizations during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Exempt Code section	(e) Public charity status (if section 501(c)(3))	(f) Direct controlling entity	(g) Section 512(b)(13) controlled entity?
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Exempt Code section	(e) Public charity status (if section 501(c)(3))	(f) Direct controlling entity	Yes	No
(1)AMERICAN CENTER FOR PHYSICS 1 PHYSICS ELLIPSE COLLEGE PARK,MD20740 52-1712905	OFFICE SPACE	MD	501(C)(3)	12B	na		No
(2)AIP Foundation 1 PHYSICS ELLIPSE College Park,MD20740 83-4485064	Fundraising	DE	501(C)(3)	12A	AIP	Yes

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

Cat. No. 50135Y

Schedule R (Form 990) 2023

Page 2

Part III

Identification of Related Organizations Taxable as a Partnership. Complete if the organization answered "Yes" on Form 990, Part IV, line 34, because it had one or more related organizations treated as a partnership during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Predominant income(related, unrelated, excluded from tax under sections 512-514)	(f) Share of total income	(g) Share of end-of-year assets	(h) Disproprtionate allocations?		(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?		(k) Percentage ownership
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity		(f) Share of total income	(g) Share of end-of-year assets	Yes	No	(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No	(k) Percentage ownership
(1) NEW CRYSTALLOGRAPHY JOURNAL 1305 WALT WHITMAN RD STE 110 MELVILLE,NY11747 90-0988084	PUBLISHING	DE	NA	RELATED	11,294	78,531		No			No	50.000 %

Part IV

Identification of Related Organizations Taxable as a Corporation or Trust. Complete if the organization answered "Yes" on Form 990, Part IV, line 34 because it had one or more related organizations treated as a corporation or trust during the tax year.

(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Type of entity (C corp, S corp, or trust)	(f) Share of total income	(g) Share of end-of-year assets	(h) Percentage ownership	(i) Section 512(b)(13) controlled entity?
(a) Name, address, and EIN of related organization	(b) Primary activity	(c) Legal domicile (state or foreign country)	(d) Direct controlling entity	(e) Type of entity (C corp, S corp, or trust)	(f) Share of total income	(g) Share of end-of-year assets	(h) Percentage ownership	Yes	No
(1) AIP GLOBAL INC 1305 WALT WHITMAN RD STE 110 MELVILLE,NY11747 27-0602778	INTL. OFFICE	DE	AIPP	C CORP	111,081	101,119	100.000 %	Yes

Schedule R (Form 990) 2023

Page 3

Part V

Transactions With Related Organizations. Complete if the organization answered "Yes" on Form 990, Part IV, line 34, 35b, or 36.

Note. Complete line 1 if any entity is listed in Parts II, III, or IV of this schedule.

Yes

1 During the tax year, did the orgranization engage in any of the following transactions with one or more related organizations listed in Parts II-IV?

a Receipt of (i) interest, (ii) annuities, (iii) royalties, or (iv) rent from a controlled entity .....................

b Gift, grant, or capital contribution to related organization(s) ............................

Yes

c Gift, grant, or capital contribution from related organization(s) ............................

Yes

d Loans or loan guarantees to or for related organization(s) ............................

e Loans or loan guarantees by related organization(s) ............................

f Dividends from related organization(s) ............................

g Sale of assets to related organization(s) ............................

h Purchase of assets from related organization(s) ............................

i Exchange of assets with related organization(s) ............................

j Lease of facilities, equipment, or other assets to related organization(s) .......................

k Lease of facilities, equipment, or other assets from related organization(s) ......................

l Performance of services or membership or fundraising solicitations for related organization(s) .....................

Yes

m Performance of services or membership or fundraising solicitations by related organization(s) .................

Yes

n Sharing of facilities, equipment, mailing lists, or other assets with related organization(s) ...................

Yes

o Sharing of paid employees with related organization(s) ............................

Yes

p Reimbursement paid to related organization(s) for expenses ............................

Yes

q Reimbursement paid by related organization(s) for expenses ............................

r Other transfer of cash or property to related organization(s) ............................

s Other transfer of cash or property from related organization(s) ............................

If the answer to any of the above is "Yes," see the instructions for information on who must complete this line, including covered relationships and transaction thresholds.

(a) Name of related organization	(b) Transaction type (a-s)	(c) Amount involved	(d) Method of determining amount involved
(1) AIP FOUNDATION	B	325,933	COST
(2) AIP FOUNDATION	O	1,098,675	COST
(3) AIP GLOBAL INC	P	1,076,385	COST

Schedule R (Form 990) 2023

Page 4

Part VI

Unrelated Organizations Taxable as a Partnership. Complete if the organization answered "Yes" on Form 990, Part IV, line 37.

Provide the following information for each entity taxed as a partnership through which the organization conducted more than five percent of its activities (measured by total assets or gross revenue) that was not a related organization. See instructions regarding exclusion for certain investment partnerships.

(a) Name, address, and EIN of entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	(e) Are all partners section 501(c)(3) organizations?		(f) Share of total income	(g) Share of end-of-year assets	(h) Disproprtionate allocations?		(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	(j) General or managing partner?		(k) Percentage ownership
(a) Name, address, and EIN of entity	(b) Primary activity	(c) Legal domicile (state or foreign country)	Yes	No	(f) Share of total income	(g) Share of end-of-year assets	Yes	No	(i) Code V-UBI amount in box 20 of Schedule K-1 (Form 1065)	Yes	No	(k) Percentage ownership

Schedule R (Form 990) 2023

Page 5

Part VII

Supplemental Information

Provide additional information for responses to questions on Schedule R. See instructions.

Return Reference	Explanation
SCHEDULE R, PART III, LINE 1, COLUMN A:	NAME, ADDRESS & EIN OF RELATED ORGANIZATION NEW CRYSTALLOGRAPHY JOURNAL, LLC 1305 WALT WHITMAN ROAD, SUITE 110 MELVILLE, NY 11747 EIN: 90-0988084
SCHEDULE R, PART IV, LINE 1, COLUMN D:	FOR THE CALENDAR YEAR 2023, AIP PUBLISHING LLC, A DISREGARDED ENTITY WITH RESPECT TO AIP, OWNED 100% OF AIP GLOBAL.

Schedule R (Form 990) 2023

Additional Data

Software ID:
Software Version:

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