TY 2018 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

2018

Open to Public Inspection

A For the 2019 calendar year, or tax year beginning 01-01-2018 , and ending 12-31-2018

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 CFO

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 $ 110,539,818

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

Tax-exempt status: 501(c)(3) 501(c) ( ) LeftBullet

(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 MediumBullet

K Form of organization: Corporation Trust Association Other MediumBullet

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	14
4	Number of independent voting members of the governing body (Part VI, line 1b) .....	4	12
5	Total number of individuals employed in calendar year 2018 (Part V, line 2a) ......	5	313
6	Total number of volunteers (estimate if necessary) .............	6	172
7a	Total unrelated business revenue from Part VIII, column (C), line 12 ........	7a	3,025,544
b	Net unrelated business taxable income from Form 990-T, line 34 .........	7b

		Prior Year	Current Year
8	Contributions and grants (Part VIII, line 1h) .........	5,181,382	213,141
9	Program service revenue (Part VIII, line 2g) .........	57,157,030	60,181,400
10	Investment income (Part VIII, column (A), lines 3, 4, and 7d ) ....	11,762,735	9,124,532
11	Other revenue (Part VIII, column (A), lines 5, 6d, 8c, 9c, 10c, and 11e)	1,791,993	6,560,845
12	Total revenue—add lines 8 through 11 (must equal Part VIII, column (A), line 12)	75,893,140	76,079,918
13	Grants and similar amounts paid (Part IX, column (A), lines 1–3 )...	621,608	662,802
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)	30,283,155	31,396,909
16a	Professional fundraising fees (Part IX, column (A), line 11e) .....	0	0
b	Total fundraising expenses (Part IX, column (D), line 25) 557,008
17	Other expenses (Part IX, column (A), lines 11a–11d, 11f–24e)....	32,585,377	33,536,628
18	Total expenses. Add lines 13–17 (must equal Part IX, column (A), line 25)	63,490,140	65,596,339
19	Revenue less expenses. Subtract line 18 from line 12.......	12,403,000	10,483,579
		Beginning of Current Year	End of Year
20	Total assets (Part X, line 16).............	230,702,109	218,396,754
21	Total liabilities (Part X, line 26).............	38,752,803	39,571,541
22	Net assets or fund balances. Subtract line 21 from line 20.....	191,949,306	178,825,213

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 MediumBullet

Firm's EIN MediumBullet

Firm's address MediumBullet

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 (2018)

Form 990 (2018)

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 $ 39,105,781 including grants of $ ) (Revenue $ 57,155,856 )
	PUBLISHING RELATED. SEE SCHEDULE O

4b	(Code: ) (Expenses $ 16,448,809 including grants of $ 662,802 ) (Revenue $ 2,513,777 )
	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 expenses55,554,590

Form 990 (2018)

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

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

Yes

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

...

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 Click to see attachment

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

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 Click to see attachment

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

Yes

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 Revenue Procedure 98-19? If "Yes," complete Schedule C, Part III Click to see attachment

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

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

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

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

...

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

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

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

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

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

......

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

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

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

.......

11b

Yes

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

.......

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

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

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

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

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

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

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

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

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

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

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) .... Click to see attachment

Yes

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............ Click to see attachment

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................... Click to see attachment

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

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

Yes

Form 990 (2018)

Page 4

Part IV

Checklist of Required Schedules (continued)

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

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, 6, or 22 for receivables from or payables to any current or former officers, directors, trustees, key employees, highest compensated employees, or disqualified persons? If "Yes," complete Schedule L, Part II................

Did the organization provide a grant or other assistance to an officer, director, trustee, key employee, substantial contributor or employee thereof, a grant selection committee member, or to a 35% controlled entity 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 Schedule L, Part IV instructions for applicable filing thresholds, conditions, and exceptions):

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

28a

A family member of a current or former officer, director, trustee, or key employee? If "Yes," complete Schedule L, Part IV.....................

28b

An entity of which a current or former officer, director, trustee, or key employee (or a family member thereof) was an officer, director, trustee, or direct or indirect owner? 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

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

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

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

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

Did the organization complete Schedule O and provide explanations in 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 ..

282

Enter the number of Forms W-2G included in 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 (2018)

Page 5

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

313

If at least one is reported on line 2a, did the organization file all required federal employment tax returns?
Note. If the sum of lines 1a and 2a is greater than 250, you may be required to e-file (see instructions)

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: MediumBullet

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? .........................

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

Form 990 (2018)

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 in 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 in 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 in 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 MediumBullet

MD , NY

Section 6104 requires an organization to make its Form 1023 (or 1024-A if applicable), 990, and 990-T (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:
MediumBullet

CATHERINE G SWARTZ CFOONE PHYSICS ELLIPSE College Park,MD207403843 (301) 209-3100

Form 990 (2018)

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 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 and/or Box 7 of Form 1099-MISC) 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.

List persons in the following order: individual trustees or directors; institutional trustees; officers; key employees; highest
compensated employees; and former such persons.

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)	(E) Reportable compensation from related organizations (W- 2/1099-MISC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and Title
(1) John Regazzi...................................................................... Former Chair	10.0 ................. 10.0	X	X	17,500	0	0
(2) David Helfand...................................................................... Chair	10.0 ................. 10.0	X	X	9,286	0	0
(3) Judith Flippen Anderson...................................................................... Former Secretary	25.0 ................. 0.0	X	X	17,500	0	0
(4) John Kent...................................................................... Director at Large	8.0 ................. 0.0	X		0	0	0
(5) Judy Dubno...................................................................... Interim Secretary	25.0 ................. 0.0	X		0	0	0
(6) Kate Kirby...................................................................... Director	4.0 ................. 3.0	X		0	0	0
(7) Beth Cunningham...................................................................... Director	4.0 ................. 3.0	X		0	0	0
(8) Faith Morrison...................................................................... Director	8.0 ................. 0.0	X		0	0	0
(9) J Daniel Bourland...................................................................... Director	8.0 ................. 0.0	X		0	0	0
(10) Michael Morgan...................................................................... Director	8.0 ................. 0.0	X		0	0	0
(11) Michael Duncan...................................................................... Director	8.0 ................. 0.0	X		0	0	0
(12) Rudolf Ludeke...................................................................... Director	4.0 ................. 0.0	X		0	0	0
(13) Cheryl Stevens...................................................................... Director	8.0 ................. 0.0	X		0	0	0
(14) Elizabeh Nolan...................................................................... Director	4.0 ................. 0.0	X		0	0	0
(15) Susan Burkett...................................................................... Director	4.0 ................. 0.0	X		0	0	0
(16) Allison Macfarlane...................................................................... Director at Large	4.0 ................. 0.0	X		0	0	0
(17) Nathan Sanders...................................................................... Director at Large	4.0 ................. 0.0	X		0	0	0

Form 990 (2018)

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)	(E) Reportable compensation from related organizations (W- 2/1099-MISC)	(F) Estimated amount of other compensation from the organization and related organizations
(A) Name and Title
(18) Michael Moloney........................................................................ CEO	40.0 .......................5.0	X	X			334,685	0	20,133
(19) Catherine O'Riordan........................................................................ COO	40.0 .......................0.0		X			107,789	0	11,772
(20) Catherine Swartz........................................................................ CFO	40.0 .......................5.0		X			288,259	0	65,883
(21) John Haynes........................................................................ AIPP, CEO	40.0 .......................0.0			X		674,389	0	42,207
(22) Larry Fishbein........................................................................ Sr Dir, News and Magazines	40.0 .......................0.0			X		160,428	0	1,142
(23) Roy Levenson........................................................................ AIPP, CFO	40.0 .......................0.0			X		344,638	0	48,614
(24) Kevin Ruthen........................................................................ AIPP, Head of Software Dev	40.0 .......................0.0			X		229,757	0	47,604
(25) Kevin Steiner........................................................................ AIPP, Dir of Global Sales	40.0 .......................0.0			X		204,140	0	59,530
(26) Jason Wilde........................................................................ AIPP, Chief Publishing Officer	40.0 .......................0.0			X		341,434	0	65,905
(27) Tracy Denien........................................................................ AIPP, Dir Business Solutions	40.0 .......................0.0				X	171,105	0	55,966
(28) Sherry Render........................................................................ Controller	40.0 .......................0.0				X	178,506	0	44,255
(29) Naomi Schmuckler........................................................................ Sr Dir, Human Resources	40.0 .......................0.0				X	180,717	0	29,400
(30) Peter Inchauteguiz........................................................................ Sr Director, Strategic Mkt	40.0 .......................0.0				X	178,620	0	8,995
(31) Sara Girard........................................................................ AIPP, Mkt & Comm Dir	40.0 .......................0.0				X	175,798	0	47,093

1b	Sub-Total................
c	Total from continuation sheets to Part VII, Section A....
d	Total (add lines 1b and 1c)...........	3,614,551	0	548,499

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

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, PO BOX 861 PLYMOUTH,MA02362	EDITORIAL OPERATIONS	1,652,075
Bryan Cave Leighton, 1155 F Street WASHINGTON,DC20004	Legal Fees	605,288
Ernst and Young LLC, 200 Plaza Drive SECAUCUS,NJ07094	Consulting Services	360,373
Green Key Temp LLC, 475 Park Ave S NEW YORK,NY07094	Temporary Agency	300,086
PHI Perspectives, 2238 Fitzwater Street PHILADELPHIA,PA19146	Consulting Services	180,508
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 12

Form 990 (2018)

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
e	Government grants (contributions)		1e	65,284

f	All other contributions, gifts, grants, and similar amounts not included above		1f	147,857

g	Noncash contributions included in lines 1a - 1f:$
h Total. Add lines 1a-1f.......		213,141

		Business Code
2a	PUBLISHING RELATED	511120	57,667,623	55,455,179	2,212,444
b	PHYSICAL SCIENCES	900099	2,513,777	1,700,677	813,100
c
d
e
f	All other program service revenue.
g	Total. Add lines 2a–2f ....		60,181,400

3 Investment income (including dividends, interest, and othersimilar amounts) ......			5,073,872			5,073,872
4 Income from investment of tax-exempt bond proceeds			0
5 Royalties...........			0
		(ii) Personal	(i) Real
6a	Gross rents
b	Less: rental expenses
c	Rental income or (loss)	0	0
d	Net rental income or (loss)......			0
		(ii) Other	(i) Securities
7a	Gross amount from sales of assets other than inventory		38,510,560
b	Less: cost or other basis and sales expenses		34,459,900
c	Gain or (loss)		4,050,660
d	Net gain or (loss).....			4,050,660			4,050,660
8a	Gross income from fundraising events (not including $ of contributions reported on line 1c). See Part IV, line 18 ....
	a		0
b	Less: direct expenses ...b		0
c	Net income or (loss) from fundraising events..			0
9a	Gross income from gaming activities. See Part IV, line 19 ...
	a		0
b	Less: direct expenses ...b		0
c	Net income or (loss) from gaming activities..			0
10a	Gross sales of inventory, less returns and allowances ..
	a		0
b	Less: cost of goods sold ..b		0
c	Net income or (loss) from sales of inventory..			0
Business Code			Miscellaneous Revenue
11a	PASS THRU MEMBER SOCIETY		900099	2,209,360			2,209,360
b	EQUITY GAIN ON ACP		900099	4,351,485			4,351,485
c
d	All other revenue ....
e	Total. Add lines 11a–11d ......			6,560,845
12	Total revenue. See Instructions......			76,079,918	57,155,856	3,025,544	15,685,377

Form 990 (2018)

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	205,570	205,570
2	Grants and other assistance to domestic individuals. See Part IV, line 22	435,968	435,968
3	Grants and other assistance to foreign organizations, foreign governments, and foreign individuals. See Part IV, line 15 and 16.	21,264	21,264
4	Benefits paid to or for members	0
5	Compensation of current officers, directors, trustees, and key employees ....	3,547,852	1,643,985	1,903,867
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	20,287,443	13,695,613	6,411,535	180,295
8	Pension plan accruals and contributions (include section 401(k) and 403(b) employer contributions) ....	2,096,697	1,341,886	712,877	41,934
9	Other employee benefits .......	3,726,664	2,385,065	1,267,066	74,533
10	Payroll taxes ...........	1,738,253	1,112,482	591,006	34,765
11	Fees for services (non-employees):
a	Management ......	2,704,101	1,457,716	1,139,644	106,741
b	Legal .........	838,800		838,800
c	Accounting ...........	286,415		286,415
d	Lobbying ...........	0
e	Professional fundraising services. See Part IV, line 17	0
f	Investment management fees ......	117,000		117,000
g	Other (If line 11g amount exceeds 10% of line 25, column (A) amount, list line 11g expenses on Schedule O)	1,351,763	867,534	484,229
12	Advertising and promotion ....	4,675,259	4,672,681		2,578
13	Office expenses .......	941,918	391,398	541,963	8,557
14	Information technology ......	3,754,528	2,498,113	1,236,940	19,475
15	Royalties ..	0
16	Occupancy ...........	2,997,395	101,831	2,895,564
17	Travel ............	1,087,622	875,216	204,813	7,593
18	Payments of travel or entertainment expenses for any federal, state, or local public officials .	0
19	Conferences, conventions, and meetings ....	1,402,395	926,386	465,217	10,792
20	Interest ...........	89,039		89,039
21	Payments to affiliates .......	0
22	Depreciation, depletion, and amortization ..	1,311,522	856,449	455,073
23	Insurance ...	249,921		249,921
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	EDIT MANAGEMENT	5,164,259	5,164,259
b	PUBLISHING PRODUCTION	2,833,247	2,831,847		1,400
c	PASS THRU MEMBER SOCIETY	2,209,157	2,209,157
d	PUBLISHING PRINTING	1,078,602	1,063,577		15,025
e	All other expenses	443,685	10,796,593	-10,406,228	53,320
25	Total functional expenses. Add lines 1 through 24e	65,596,339	55,554,590	9,484,741	557,008
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 (2018)

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 ........			27,328,247	1	29,810,881
2	Savings and temporary cash investments .........			3,856,159	2	2,655,876
3	Pledges and grants receivable, net ......			3,042,274	3	1,875,158
4	Accounts receivable, net .............			3,652,775	4	3,772,420
5	Loans and other receivables from current and former officers, directors, trustees, key employees, and highest compensated employees. Complete Part II of Schedule L .............
				0	5	0
6	Loans and other receivables from other disqualified persons (as defined under section 4958(f)(1)), persons described in section 4958(c)(3)(B), and contributing employers and sponsoring organizations of section 501(c)(9) voluntary employees' beneficiary organizations (see instructions) Complete Part II of Schedule L ..............
				0	6	0
7	Notes and loans receivable, net ....			170,534	7	175,455
8	Inventories for sale or use ........			0	8	0
9	Prepaid expenses and deferred charges ......			1,516,785	9	2,433,191
10a	Land, buildings, and equipment: cost or other basis. Complete Part VI of Schedule D	10a	13,127,797
b	Less: accumulated depreciation	10b	8,669,120	5,815,745	10c	4,458,677
11	Investments—publicly traded securities .			145,326,851	11	127,743,764
12	Investments—other securities. See Part IV, line 11 .....			28,714,852	12	29,741,960
13	Investments—program-related. See Part IV, line 11 ..			508,009	13	608,009
14	Intangible assets ...............			0	14	0
15	Other assets. See Part IV, line 11 ...........			10,769,878	15	15,121,363
16	Total assets. Add lines 1 through 15 (must equal line 34)...			230,702,109	16	218,396,754

17	Accounts payable and accrued expenses .....	7,917,902	17	8,966,467
18	Grants payable ...	0	18	0
19	Deferred revenue .........	21,883,955	19	20,822,773
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 current and former officers, directors, trustees, key employees, highest compensated employees, and disqualified
	persons. Complete Part II of Schedule L..	0	22	0
23	Secured mortgages and notes payable to unrelated third parties ..	0	23	0
24	Unsecured notes and loans payable to unrelated third parties ..	0	24	0
25	Other liabilities (including federal income tax, payables to related third parties, and other liabilities not included on lines 17 - 24). Complete Part X of Schedule D	8,950,946	25	9,782,301
26	Total liabilities. Add lines 17 through 25..	38,752,803	26	39,571,541

	Organizations that follow SFAS 117 (ASC 958), check here and complete lines 27 through 29, and lines 33 and 34.
27	Unrestricted net assets	167,975,883	27	151,157,428
28	Temporarily restricted net assets ...........	12,880,975	28	16,427,480
29	Permanently restricted net assets	11,092,448	29	11,240,305
	Organizations that do not follow SFAS 117 (ASC 958), check here and complete lines 30 through 34.
30	Capital stock or trust principal, or current funds .....		30
31	Paid-in or capital surplus, or land, building or equipment fund ...		31
32	Retained earnings, endowment, accumulated income, or other funds		32
33	Total net assets or fund balances ...........	191,949,306	33	178,825,213
34	Total liabilities and net assets/fund balances ........	230,702,109	34	218,396,754

Form 990 (2018)

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) ............

76,079,918

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

65,596,339

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

10,483,579

Net assets or fund balances at beginning of year (must equal Part X, line 33, column (A)) ..

191,949,306

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

-18,538,259

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

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

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

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

-5,069,413

Net assets or fund balances at end of year. Combine lines 3 through 9 (must equal Part X, line 33, column (B))

178,825,213

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 in
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 Single Audit Act and OMB Circular A-133?

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 (2018)

Additional Data

Software ID:
Software Version:

Form 990, Special Condition Description:

Special Condition Description

- TIN:

SCHEDULE A
(Form 990 or 990EZ)

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 the latest information.

OMB No. 1545-0047

2018

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 or 990-EZ).)

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 331/3% 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 331/3% 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 in 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 or 990-EZ) 2018

Page 2

Part II

Support Schedule for Organizations Described in Sections 170(b)(1)(A)(iv), 170(b)(1)(A)(vi), and 170(b)(1)(A)(ix)
(Complete only if you checked the box on line 5, 7, 8, or 9 of Part I or if the organization failed to qualify under Part III. If the organization fails to qualify under the tests listed below, please complete Part III.)

Section A. Public Support

Calendar year (or fiscal year beginning in)		(a) 2014	(b) 2015	(c) 2016	(d) 2017	(e) 2018	(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) 2014	(b) 2015	(c) 2016	(d) 2017	(e) 2018	(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 five 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 2018 (line 6, column (f) divided by line 11, column (f)) .........

Public support percentage for 2017 Schedule A, Part II, line 14 ...............

16a

33 1/3% support test—2018. 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—2017. 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—2018. 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—2017. 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 or 990-EZ) 2018

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) 2014	(b) 2015	(c) 2016	(d) 2017	(e) 2018	(f) Total
1	Gifts, grants, contributions, and membership fees received. (Do not include any "unusual grants.") .	456,777	625,308	542,542	5,181,382	213,141	7,019,150
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	59,001,026	57,996,069	59,517,781	57,157,030	57,155,856	290,827,762
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	59,457,803	58,621,377	60,060,323	62,338,412	57,368,997	297,846,912
7a	Amounts included on lines 1, 2, and 3 received from disqualified persons				5,000,000		5,000,000
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..				5,000,000		5,000,000
8	Public support. (Subtract line 7c from line 6.)						292,846,912

Section B. Total Support

Calendar year (or fiscal year beginning in)		(a) 2014	(b) 2015	(c) 2016	(d) 2017	(e) 2018	(f) Total
9	Amounts from line 6...	59,457,803	58,621,377	60,060,323	62,338,412	57,368,997	297,846,912
10a	Gross income from interest, dividends, payments received on securities loans, rents, royalties and income from similar sources..	2,961,335	3,815,457	3,503,594	5,265,827	5,073,872	20,620,085
b	Unrelated business taxable income (less section 511 taxes) from businesses acquired after June 30, 1975.						0
c	Add lines 10a and 10b.	2,961,335	3,815,457	3,503,594	5,265,827	5,073,872	20,620,085
11	Net income from unrelated business activities not included in 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.) ..	8,567,770	3,917,266	766,626	1,791,993	6,560,845	21,604,500
13	Total support. (Add lines 9, 10c, 11, and 12.)..	70,986,908	66,354,100	64,330,543	69,396,232	69,003,714	340,071,497

First five 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 2018 (line 8, column (f) divided by line 13, column (f)) .........

86.113 %

Public support percentage from 2017 Schedule A, Part III, line 15 ...............

85.766 %

Section D. Computation of Investment Income Percentage

Investment income percentage for 2018 (line 10c, column (f) divided by line 13, column (f)) ......

6.064 %

Investment income percentage from 2017 Schedule A, Part III, line 17 .............

5.872 %

19a

331/3% support tests—2018. 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—2017. 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 or 990-EZ) 2018

Page 4

Part IV

Supporting Organizations

(Complete only if you checked a box on line 12 of Part I. If you checked 12a of Part I, complete Sections A and B. If you checked 12b of Part I, complete Sections A and C. If you checked 12c of Part I, complete Sections A, D, and E. If you checked 12d 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 (b) and (c) 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 12a or 12b in Part I, answer (b) and (c) 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 (b) and (c) 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 or 990-EZ) .

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

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 in 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 in 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 or 990-EZ) 2018

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 in (b) and (c) below, the governing body of a supported organization?

11a

A family member of a person described in (a) above?

11b

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

11c

Section B. Type I Supporting Organizations

Yes

Did the 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 (2), 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 (a) and (b) 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 in (a) 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 (a) and (b) 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? 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 or 990-EZ) 2018

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 1-1/2% 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 .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 or 990-EZ) 2018

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
2 Amounts paid to perform activity that directly furthers exempt purposes of supported organizations, in excess of income from activity
3 Administrative expenses paid to accomplish exempt purposes of supported organizations
4 Amounts paid to acquire exempt-use assets
5 Qualified set-aside amounts (prior IRS approval required)
6 Other distributions (describe in Part VI). See instructions
7Total annual distributions. Add lines 1 through 6.
8 Distributions to attentive supported organizations to which the organization is responsive (provide details in Part VI). See instructions
9 Distributable amount for 2018 from Section C, line 6
10 Line 8 amount divided by Line 9 amount

Section E - Distribution Allocations (see instructions)		(i) Excess Distributions	(ii) Underdistributions Pre-2018	(iii) Distributable Amount for 2018
1 Distributable amount for 2018 from Section C, line 6
2 Underdistributions, if any, for years prior to 2018 (reasonable cause required-- explain in Part VI). See instructions.
3 Excess distributions carryover, if any, to 2018:
a From 2013.......
b From 2014.......
c From 2015.......
d From 2016.......
e From 2017.......
fTotal of lines 3a through e
g Applied to underdistributions of prior years
h Applied to 2018 distributable amount
i Carryover from 2013 not applied (see instructions)
j Remainder. Subtract lines 3g, 3h, and 3i from 3f.
4Distributions for 2018 from Section D, line 7:
$
a Applied to underdistributions of prior years
b Applied to 2018 distributable amount
c Remainder. Subtract lines 4a and 4b from 4.
5 Remaining underdistributions for years prior to 2018, 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 2018. 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 2019. Add lines 3j and 4c.
8 Breakdown of line 7:
a Excess from 2014......
b Excess from 2015.....
c Excess from 2016.....
d Excess from 2017.....
e Excess from 2018.....

Schedule A (Form 990 or 990-EZ) (2018)

Schedule A (Form 990 or 990-EZ) 2018

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 or 990-EZ) 2018

Additional Data

Software ID:
Software Version:

- TIN:

Schedule B
(Form 990, 990-EZ,
or 990-PF)

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

2018

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, 990-EZ, or 990-PF) (2018)

Schedule B (Form 990, 990-EZ, or 990-PF) (2018) Page 2

Name of organization American Institute of Physics Inc

Part I	Contributors (See instructions). Use duplicate copies of Part I if additional space is needed.
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
RESTRICTED	,	$ RESTRICTED	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
(a) No.	(b) Name, address, and ZIP + 4	(c) Total contributions	(d) Type of contribution
		$	Person Payroll Noncash (Complete Part II for noncash contributions.)
Schedule B (Form 990, 990-EZ, or 990-PF) (2018)

Schedule B (Form 990, 990-EZ, or 990-PF) (2018)

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, 990-EZ, or 990-PF) (2018)

Schedule B (Form 990, 990-EZ, or 990-PF) (2018)

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, 990-EZ, or 990-PF) (2018)

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE C
(Form 990 or 990-EZ)

Department of the Treasury
Internal Revenue Service

Political Campaign and Lobbying Activities

For Organizations Exempt From Income Tax Under section 501(c) and section 527

SchCMd Bullet

Complete if the organization is described below. SchCMd Bullet

Attach to Form 990 or Form 990-EZ.
SchCMd Bullet

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

OMB No. 1545-0047

2018

Open to Public
Inspection

If the organization answered "Yes" on Form 990, Part IV, Line 3, or Form 990-EZ, Part V, line 46 (Political Campaign Activities), then
Round Bullet

Section 501(c)(3) organizations: Complete Parts I-A and B. Do not complete Part I-C.
Round Bullet

Section 501(c) (other than section 501(c)(3)) organizations: Complete Parts I-A and C below. Do not complete Part I-B.
Round Bullet

Section 527 organizations: Complete Part I-A only.
If the organization answered "Yes" on Form 990, Part IV, Line 4, or Form 990-EZ, Part VI, line 47 (Lobbying Activities), then
Round Bullet

Section 501(c)(3) organizations that have filed Form 5768 (election under section 501(h)): Complete Part II-A. Do not complete Part II-B.
Round Bullet

Section 501(c)(3) organizations that have NOT filed Form 5768 (election under section 501(h)): Complete Part II-B. Do not complete Part II-A.
If the organization answered "Yes" on Form 990, Part IV, Line 5 (Proxy Tax) (see separate instructions) or Form 990-EZ, Part V, line 35c (Proxy Tax) (see separate instructions), then
Round Bullet

Section 501(c)(4), (5), or (6) organizations: Complete Part III.

Name of the organization

American Institute of Physics Inc

Employer identification number

13-1667053

Part I-A

Complete if the organization is exempt under section 501(c) or is a section 527 organization.

Provide a description of the organization’s direct and indirect political campaign activities in Part IV (see instructions for definition of “political campaign activities")

Political campaign activity expenditures (see instructions) .................................................................... SchCMd Bullet

Volunteer hours for political campaign activities (see instructions) ..................................................................

Part I-B

Complete if the organization is exempt under section 501(c)(3).

Enter the amount of any excise tax incurred by the organization under section 4955 ................................ SchCMd Bullet

Enter the amount of any excise tax incurred by organization managers under section 4955 ....................... SchCMd Bullet

If the organization incurred a section 4955 tax, did it file Form 4720 for this year? .........................................

Yes No

Was a correction made? ......................................................................................................................

Yes No

If "Yes," describe in Part IV.

Part I-C

Complete if the organization is exempt under section 501(c), except section 501(c)(3).

Enter the amount directly expended by the filing organization for section 527 exempt function activities ..... SchCMd Bullet

Enter the amount of the filing organization's funds contributed to other organizations for section 527 exempt function activities ............................................................................................................................ SchCMd Bullet

Total exempt function expenditures. Add lines 1 and 2. Enter here and on Form 1120-POL, line 17b........... SchCMd Bullet

Did the filing organization file Form 1120-POL for this year? ...................................................................

Yes No

Enter the names, addresses and employer identification number (EIN) of all section 527 political organizations to which the filing
organization made payments. For each organization listed, enter the amount paid from the filing organization’s funds. Also enter the amount of political contributions received that were promptly and directly delivered to a separate political organization, such as a separate segregated fund or a political action committee (PAC). If additional space is needed, provide information in Part IV.

(a) Name	(b) Address	(c) EIN	(d) Amount paid from filing organization's funds. If none, enter -0-.	(e) Amount of political contributions received and promptly and directly delivered to a separate political organization. If none, enter -0-.
1
2
3
4
5
6

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

Cat. No. 50084S

Schedule C (Form 990 or 990-EZ) 2018

Page 2

Part II-A

Complete if the organization is exempt under section 501(c)(3) and filed Form 5768 (election under section 501(h)).

A Check SchCMd Bullet

if the filing organization belongs to an affiliated group (and list in Part IV each affiliated group member's name, address, EIN, expenses, and share of excess lobbying expenditures).
B Check SchCMd Bullet

if the filing organization checked box A and "limited control" provisions apply.

Limits on Lobbying Expenditures (The term "expenditures" means amounts paid or incurred.)		(b) Affiliated group totals
1a	Total lobbying expenditures to influence public opinion (grass roots lobbying) ......................
b	Total lobbying expenditures to influence a legislative body (direct lobbying) ...............................
c	Total lobbying expenditures (add lines 1a and 1b) ...................................................................
d	Other exempt purpose expenditures ........................................................................
e	Total exempt purpose expenditures (add lines 1c and 1d) ...............................................
f	Lobbying nontaxable amount. Enter the amount from the following table in both columns.
	If the amount on line 1e, column (a) or (b) is:The lobbying nontaxable amount is:
	Not over $500,00020% of the amount on line 1e.
	Over $500,000 but not over $1,000,000$100,000 plus 15% of the excess over $500,000.
	Over $1,000,000 but not over $1,500,000$175,000 plus 10% of the excess over $1,000,000.
	Over $1,500,000 but not over $17,000,000$225,000 plus 5% of the excess over $1,500,000.
	Over $17,000,000$1,000,000.

g	Grassroots nontaxable amount (enter 25% of line 1f) .................................................
h	Subtract line 1g from line 1a. If zero or less, enter -0-. ................................................
i	Subtract line 1f from line 1c. If zero or less, enter -0-. ................................................
j	If there is an amount other than zero on either line 1h or line 1i, did the organization file Form 4720 reporting section 4911 tax for this year? ...................................................................................................................	Yes No

4-Year Averaging Period Under section 501(h) (Some organizations that made a section 501(h) election do not have to complete all of the five columns below. See the separate instructions for lines 2a through 2f.)
Lobbying Expenditures During 4-Year Averaging Period
	Calendar year (or fiscal year beginning in)	(a) 2015	(b) 2016	(c) 2017	(d) 2018	(e) Total

2a	Lobbying nontaxable amount

b	Lobbying ceiling amount (150% of line 2a, column(e))

c	Total lobbying expenditures

d	Grassroots nontaxable amount

e	Grassroots ceiling amount (150% of line 2d, column (e))

f	Grassroots lobbying expenditures

Schedule C (Form 990 or 990-EZ) 2018

Page 3

Part II-B

Complete if the organization is exempt under section 501(c)(3) and has NOT filed Form 5768 (election under section 501(h)).

For each "Yes" response on lines 1a through 1i below, provide in Part IV a detailed description of the lobbying activity.

(a)

Yes

(b)

Amount

During the year, did the filing organization attempt to influence foreign, national, state or local legislation, including any attempt to influence public opinion on a legislative matter or referendum, through the use of:

Volunteers? ...........................................................................................................

Yes

Paid staff or management (include compensation in expenses reported on lines 1c through 1i)? ........

Yes

Media advertisements? ...................................................................................................

Mailings to members, legislators, or the public? .............................................................................

Publications, or published or broadcast statements? ...........................................................

Grants to other organizations for lobbying purposes? ..........................................................

Direct contact with legislators, their staffs, government officials, or a legislative body? .......................

Yes

120,000

Rallies, demonstrations, seminars, conventions, speeches, lectures, or any similar means? ..................

Other activities? ...................................................................................................................

Total. Add lines 1c through 1i ....................................................................................................

120,000

Did the activities in line 1 cause the organization to be not described in section 501(c)(3)? .....

If "Yes," enter the amount of any tax incurred under section 4912 ...........................................

If "Yes," enter the amount of any tax incurred by organization managers under section 4912 ...................

If the filing organization incurred a section 4912 tax, did it file Form 4720 for this year? ........................

Part III-A

Complete if the organization is exempt under section 501(c)(4), section 501(c)(5), or section 501(c)(6).

Yes

Were substantially all (90% or more) dues received nondeductible by members? ...............................................

Did the organization make only in-house lobbying expenditures of $2,000 or less? ............................................

Did the organization agree to carry over lobbying and political expenditures from the prior year? .................................

Part III-B

Complete if the organization is exempt under section 501(c)(4), section 501(c)(5), or section 501(c)(6) and if either (a) BOTH Part III-A, lines 1 and 2, are answered "No" OR (b) Part III-A, line 3, is answered “Yes."

Dues, assessments and similar amounts from members ......................................................................

Section 162(e) nondeductible lobbying and political expenditures (do not include amounts of political expenses for which the section 527(f) tax was paid).

Current year .............................................................................................................................

Carryover from last year ............................................................................................................

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

Aggregate amount reported in section 6033(e)(1)(A) notices of nondeductible section 162(e) dues .

If notices were sent and the amount on line 2c exceeds the amount on line 3, what portion of the excess does the organization agree to carryover to the reasonable estimate of nondeductible lobbying and political expenditure next year? ......................................................................................................................

Taxable amount of lobbying and political expenditures (see instructions) .........................................

Part IV

Supplemental Information

Provide the descriptions required for Part l-A, line 1; Part l-B, line 4; Part l-C, line 5; Part II-A (affiliated group list); Part II-A, lines 1 and 2 (see instructions), and Part ll-B, line 1. Also, complete this part for any additional information.

Return Reference	Explanation
Schedule C, PART II-B - DESCRIPTION OF LOBBYING ACTIVITY:	AIP'S LOBBYING EFFORTS FOCUS ON SCIENCE AND TECHNOLOGY FUNDING AND PROGRAM DIRECTIONS FOR THE NATIONAL SCIENCE FOUNDATION, NATIONAL AERONAUTICS AND SPACE ADMINISTRATION, DEPARTMENT OF ENERGY, NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY AND DEPARTMENT OF DEFENSE. WE ALSO WORK ON GOVERNMENT MANDATES AFFECTING SCHOLARLY PUBLISHING, SCIENCE EDUCATION, AS WELL AS SCIENCE IN GENERAL.

Schedule C (Form 990 or 990EZ) 2018

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.
SchDMd Bullet

Attach to Form 990.
SchDMd Bullet

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

OMB No. 1545-0047

2018

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 7/25/06, 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 SchDMd Bullet

Number of states where property subject to conservation easement is located SchDMd Bullet

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
SchDMd Bullet

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

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 SFAS 116 (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 SFAS 116 (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 ......................... SchDMd Bullet

(ii)

Assets included in Form 990, Part X ............................... SchDMd Bullet

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 SFAS 116 (ASC 958) relating to these items:

Revenue included on Form 990, Part VIII, line 1 .......................... SchDMd Bullet

Assets included in Form 990, Part X ............................... SchDMd Bullet

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

Cat. No. 52283D

Schedule D (Form 990) 2018

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 ....	23,014,776	17,347,568	16,654,442	27,228,652	26,624,446
b	Contributions ...	2,059,000	2,882,328	68,565	246,811	76,215
c	Net investment earnings, gains, and losses	-1,232,576	3,439,156	1,216,351	-460,358	969,441
d	Grants or scholarships ...
e	Other expenditures for facilities and programs ...	-87,369,852	654,276	591,790	10,360,663	441,450
f	Administrative expenses ....
g	End of year balance ......	111,211,052	23,014,776	17,347,568	16,654,442	27,228,652

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

Board designated or quasi-endowment SchDMd Bullet

84.500 %

Permanent endowment SchDMd Bullet

10.000 %

Temporarily restricted endowment SchDMd Bullet

5.500 %

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	4,863,091	2,303,203	2,559,888
d	Equipment ....	1,255,686	1,098,020	157,666
e	Other .....	7,009,020	5,267,897	1,741,123
Total. Add lines 1a through 1e. (Column (d) must equal Form 990, Part X, column (B), line 10(c).)..				4,458,677

Schedule D (Form 990) 2018

Page 3

Part VII

InvestmentsOther 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) OPPORTUNISTIC INVESTMENTS	29,741,960	F
(A)
(B)
(C)
(D)
(E)
(F)
(G)
(H)
Total. (Column (b) must equal Form 990, Part X, col. (B) line 12.)	29,741,960

Part VIII

InvestmentsProgram 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				15,121,363
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 15.)...........				15,121,363

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	6,460,374
DUE TO MEMBER SOCIETIES	1,330,805
DEFERRED RENT	1,991,122
(4)
(5)
(6)
(7)
(8)
(9)
Total. (Column (b) must equal Form 990, Part X, col.(B) line 25.)	9,782,301
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) 2018

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 III, LINE 1A:	The Niels Bohr Library and Archives collections, which were acquired through purchases and contributions since 1962, are not recognized as assets on the consolidated statements of financial position. Purchases of collection items are recorded as decreases in net assets without donor restrictions in the year in which the items are acquired, or as releases of net assets with donor restrictions if the assets used to purchase the items are restricted by donors.
SCHEDULE D, PART V, LINE 4:	AIP has 13 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, High School Physics Education Programs, 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. The 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-endowmment funds: General Quasi-Endowment - A board designated quasi-endowment created for the purpose of funding AIP Program Operations. Venture Partnership Fund - The VPF was established in 2016 as a board-designated quasi-endowment fund established to encourage collaborative partnerships among one or more Member Societies and AIP. Collabroative projects funded by the VPF are expected to be strategy driven, promote growth, and increase stature and innovation within the Member Societies and the AIP federation. Sustainability of the Niels Bohr Library and Archives and the Center for History of Physics - A new 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 for History of Physics in perpetuity.
SCHEDULE D, PART V, LINE 1e:	Transfer to create Board-designated funds $92,869,365 Other expenditures for facilities and programs ($ 5,599,531) -------------- $87,369,852
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 Internal Revenue Code, 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. At December 31, 2018 and 2017, a provision of $10,000 for state income taxes was recorded.

Schedule D (Form 990) 2018

Additional Data

Software ID:
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 pointing arrow large image

Attach to Form 990. Right pointing arrow large image

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

OMB No. 1545-0047

2018

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" to 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 region	(d) Activities conducted in region (by type) (e.g., 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 region	(f) Total expenditures for and investments in region
	East Asia and the Pacific	1	3	Program Services	Liason Office	329,077
	Europe (Including Iceland and Greenland)	0	0	Grantmaking		17,976
	East Asia and the Pacific	0	0	Grantmaking		7,500
	North America	0	0	Grantmaking		4,550
	Central America and the Caribbean			Investments		3,725,415












3a	Sub-total .....	1	3			4,084,518
b	Total from continuation sheets to Part I ...
c	Totals (add lines 3a and 3b)	1	3			4,084,518

For Paperwork Reduction Act Notice, see the Instructions for Form 990.Cat. No. 50082W Schedule F (Form 990) 2018

Schedule F (Form 990) 2018

Page 2

Part II

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

(c) Region	(d) Purpose of grant	(e) Amount of cash grant	(f) Manner of cash disbursement
Europe (Including Iceland and Greenland)	Oral History Interviews	8,762	Check

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 .......................	1

Schedule F (Form 990) 2018

Schedule F (Form 990) 2018Page 3

Part III

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

Part III can be duplicated if additional space is needed.

	(b) Region	(c) Number of recipients	(d) Amount of cash grant	(e) Manner of cash disbursement
Writing Award	East Asia and the Pacific	1	7,500	Check
Oral History Interviews/Research Projects	Europe (Including Iceland and Greenland)	17	9,214	Check
Oral History Interviews/Research Projects	North America	4	4,550	Check
Writing Award	Middle East and North Africa	1	2,500	Check
Writing Award	Europe (Including Iceland and Greenland)	1	10,000	Check

Schedule F (Form 990) 2018

Page 4

Part IV

Foreign Forms

Schedule F (Form 990) 2018

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) 2018

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE G (Form 990 or 990-EZ)

Department of the Treasury
Internal Revenue Service

Supplemental Information Regarding
Fundraising or Gaming Activities

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

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

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

OMB No. 1545-0047

2018

Open to Public Inspection

Name of the organization
American Institute of Physics Inc

Employer identification number

13-1667053

Part I

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

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

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

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

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

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

YesNo

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

(i) Name and address of individual or entity (fundraiser)		(ii) Activity	(iii) Did fundraiser have custody or control of contributions?		(iv) Gross receipts from activity	(v) Amount paid to (or retained by) fundraiser listed in col. (i)	(vi) Amount paid to (or retained by) organization
			Yes	No
	Campbell and Company One East Wacker Drive Chicago, IL60601	Feasibility Study		No	0	84,642	84,642









Total . . . . . . . . . . . . . . . . . . . .					0	84,642	84,642

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

MD, NY

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

Cat. No. 50083H

Schedule G (Form 990 or 990-EZ) 2018

Page 2

Part II

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

		(a) Event #1 (event type)	(b) Event #2 (event type)	(c) Other events (total number)	(d) Total events (add col. (a) through col. (c))
1	Gross receipts . . . . .
2	Less: Contributions . . . .
3	Gross income (line 1 minus line 2) . . . . . .

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

Part III

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

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

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

Volunteer labor . . . .

	Yes %
	No

	Yes %
	No

	Yes %
	No

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

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

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

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

YesNo

If "No," explain:

10a

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

YesNo

If "Yes," explain:

Schedule G (Form 990 or 990-EZ) 2018

Page 3

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

YesNo

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

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

YesNo

Indicate the percentage of gaming activity conducted in:

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

13a

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

13b

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

Name

Address

15a

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

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

YesNo

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

$ and the

amount of gaming revenue retained by the third party right arrow

$ .

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

Name

Address

Gaming manager information:

Name

Gaming manager compensation right arrow

Description of services provided right arrow

Director/officer Employee Independent contractor

Mandatory distributions:

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

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

YesNo

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

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

Part IV

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

Return Reference	Explanation

Schedule G (Form 990 or 990-EZ) 2018

Additional Data

Software ID:
Software Version:

- TIN:

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

2018

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) American Association of Physics Teachers 1 Physics Ellipse NIST Bld College Park,MD20740	52-0749775	501(c)(3)	31,761	SEE PART IV
(2) American Astronomical Society 1667 K St NW Suite 800 Washington,DC20006	21-0735173	501(c)(3)	8,460	SEE PART IV
(3) American Philosophical Society 105 South Fifth Street Philadelphia,PA19106	23-1353269	501(c)(3)	10,000	SEE PART IV
(4) American Physical Society 1 Physics Ellipse College Park,MD20740	13-1656610	501(c)(3)	28,820	SEE PART IV
(5) AVS The Science & Technology Society 125 Maiden Lane 15B New York,NY10038	04-2392373	501(c)(3)	30,000	SEE PART IV
(6) George Washington University 725 21st St NW Washington,DC20052	53-0196584	501(c)(3)	29,452	SEE PART IV
(7) National History Day Inc 4511 Knox Road Suite 205 College Park,MD20740	34-1262642	501(c)(3)	11,000	SEE PART IV
(8) The Optical Society 2010 Massachustts Ave NW Washington,DC20036	53-0259696	501(c)(3)	50,000	SEE PART IV
(9) University Corp for Atmospheric Research 3090 Center Green Dr Boulder,CO80301	84-0412668	501(c)(3)	6,077	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) 2018

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) Travel and Meeting Expenses	89	22,794
(2) Congressional and US State Department Fellows	5	237,674
(3) Scholarships and Awards for SPS Members	53	44,825
(4) Oral History Interview and Research Projects	23	26,623
(5) Science Writing Awards	8	32,500	1,815	FMV	Chairs
(6) Awards for Achievements in Physics	5	25,000
(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, Column H, Lines 1-9:

1) Provide funding to train teachers to be advocates at the local level for sound science education policy. 2) Provide funding to provide an introduction to the tools used in handling big data for researchers to use as they "build" their science. 3) Funding to support archival work plus materials for re-housing and storage of papers from Rose Camille LeDieu Mooney-Slater, George T Reynolds, and John A Wheeler and the records of the Physics Club of Philadelphia. 4) Provide funding to prepare a report on the impact of industrial physics on the U.S. economy and U.S. technology excellence. 5) Provide funding to produce a set of videos which will enhance and augment pre-college teachers understanding science of and in a vacuum. 6) Provide housing to 17 undergraduate physics students selected for the Society of Physics students summer intern program. 7) Funding to support National History Day awards for high school juniors and seniors. 8) Provide funding for art installation and outreach initiative to celebrate optics, light and photonics. 9) Funding used to process and provide access to records of the research application at the NCAR Archives.

SCHEDULE I, PART I, LINE 2:

PROCEDURE FOR MONITORING USE OF GRANTS FUNDS IN 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) 2018

Additional Data

Software ID:
Software Version:

- TIN:

Schedule J
(Form 990)

Department of the Treasury
Internal Revenue Service

Compensation Information

For certain Officers, Directors, Trustees, Key Employees, and Highest
Compensated Employees
SchJMediumBullet

Complete if the organization answered "Yes" on Form 990, Part IV, line 23.
SchJMediumBullet

Attach to Form 990.
SchJMediumBullet

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

OMB No. 1545-0047

2018

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 in 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 in 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? .............

Yes

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) 2018

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 and/or 1099-MISC compensation			(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)	334,685 ------------- 0	0 ------------- 0	0 ------------- 0	0 ------------- 0	20,133 ------------- 0	354,818 ------------- 0	0 ------------- 0
2Catherine Swartz CFO	(i) (ii)	286,223 ------------- 0	0 ------------- 0	2,036 ------------- 0	27,500 ------------- 0	38,383 ------------- 0	354,142 ------------- 0	0 ------------- 0
3John Haynes AIPP, CEO	(i) (ii)	471,727 ------------- 0	183,562 ------------- 0	19,100 ------------- 0	27,500 ------------- 0	14,707 ------------- 0	716,596 ------------- 0	0 ------------- 0
4Larry Fishbein Sr Dir, News and Magazines	(i) (ii)	160,265 ------------- 0	163 ------------- 0	0 ------------- 0	0 ------------- 0	1,142 ------------- 0	161,570 ------------- 0	0 ------------- 0
5Roy Levenson AIPP, CFO	(i) (ii)	283,204 ------------- 0	54,242 ------------- 0	7,192 ------------- 0	27,500 ------------- 0	21,114 ------------- 0	393,252 ------------- 0	0 ------------- 0
6Kevin Ruthen AIPP, Head of Software Dev	(i) (ii)	148,500 ------------- 0	5,040 ------------- 0	76,217 ------------- 0	17,810 ------------- 0	29,794 ------------- 0	277,361 ------------- 0	0 ------------- 0
7Kevin Steiner AIPP, Dir of Global Sales	(i) (ii)	162,745 ------------- 0	41,275 ------------- 0	120 ------------- 0	21,509 ------------- 0	38,021 ------------- 0	263,670 ------------- 0	0 ------------- 0
8Jason Wilde AIPP, Chief Publishing Officer	(i) (ii)	280,275 ------------- 0	54,294 ------------- 0	6,865 ------------- 0	27,500 ------------- 0	38,405 ------------- 0	407,339 ------------- 0	0 ------------- 0
9Tracy Denien AIPP, Dir Business Solutions	(i) (ii)	167,630 ------------- 0	2,875 ------------- 0	600 ------------- 0	17,935 ------------- 0	38,031 ------------- 0	227,071 ------------- 0	0 ------------- 0
10Sherry Render Controller	(i) (ii)	173,620 ------------- 0	4,886 ------------- 0	0 ------------- 0	18,358 ------------- 0	25,897 ------------- 0	222,761 ------------- 0	0 ------------- 0
11Naomi Schmuckler Sr Dir, Human Resources	(i) (ii)	172,286 ------------- 0	8,291 ------------- 0	140 ------------- 0	18,312 ------------- 0	11,088 ------------- 0	210,117 ------------- 0	0 ------------- 0
12Peter Inchauteguiz Sr Director, Strategic Mkt	(i) (ii)	178,275 ------------- 0	0 ------------- 0	345 ------------- 0	7,711 ------------- 0	1,284 ------------- 0	187,615 ------------- 0	0 ------------- 0
13Sara Girard AIPP, Mkt & Comm Dir	(i) (ii)	158,623 ------------- 0	16,575 ------------- 0	600 ------------- 0	16,981 ------------- 0	30,112 ------------- 0	222,891 ------------- 0	0 ------------- 0

Schedule J (Form 990) 2018

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:	First class travel - Due to a medical condition, first class travel was made available to one employee. 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, PART I, LINE 4A:	KEVIN RUTHEN, AIPP, HEAD OF SOFTWARE DEVELOPMENT, RECEIVED SEVERANCE OF $59,115 DURING THE YEAR.

Schedule J (Form 990) 2018

Additional Data

Software ID:
Software Version:

- TIN:

SCHEDULE O
(Form 990 or 990-EZ)

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.
MediumBullet

Attach to Form 990 or 990-EZ.
MediumBullet

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

OMB No. 1545-0047

2018

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:	AIPs mission is to advance, promote and serve the physical sciences for the benefit of humanity. AIP offers programs, products, and services that 1) advance and distribute the knowledge of the physical sciences and its applications, 2) enhance and cultivate the physical sciences disciplines, 3) enable and foster collaborative efforts among stakeholders in the physical sciences 4) promote the physical sciences to the public, government officials, agencies and the media.
FORM 990, PART III, LINE 4A:	Program services: AIP Publishing LLC (AIPP) is a single member, not-for-profit, 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, AIPPs portfolio of 20 journals includes prestigious titles such as Applied Physics Letters, Journal of Applied Physics, 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 AIPs member societies and other publishing partners to help advance their publishing mission. Physics Today, AIP's flagship magazine, 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 AIPs ten constituent societies, libraries and institutions around the world, and other interested individuals. The Physics Today website publishes additional material and is updated daily. Physics Today also has a strong presence on social media with, for example, more than 3 million followers on Facebook.
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, Archival 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 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 undergraduates and their mentors, with more than 4200 members and 818 SPS chapters nationwide and 33 international chapters. SPS exists to support departments and the undergraduate physics community. Sigma Pi Sigma, the Physics Honor Society, recognizes outstanding scholars in physics, encourages interest in the field, and promotes an attitude of service among its over 70,000 members and 580 chapters towards the entire physics community and the public. A primary mission of Sigma Pi Sigma is to support the students, departments, and physics alumni by improving department health. 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 the undergraduate physics student. The AIP History Programs (The Center for History of Physics and The Niels Bohr Library & Archives) work to preserve and make known the historical record of the modern physical sciences through documentation, archival collections, oral histories, and public engagement. The AIP History Programs ensure that the heritage of the physical sciences is safeguarded and that the public can understand how physical science has 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. The Niels Bohr Library and archives recently acquired a transformative collection of rare books and publications containing the first published accounts of the most important discoveries in physical sciences over the past four centuries, featuring works by Ptolemy, Galileo, Huygens, Halley, Neuton, Curie, LaPlace, and more. AIP's Inside Science is an editorially independent, news outlet that produces quality, accurate STEM (science-technology- education-mathematics) news. The content is available for syndication by mainstream news organization, including those with reduced or non-existent science reporters. Inside Science includes four areas: news articles, videos, guest columns and an editors blog. The AIP Media Services Team works with AIP Publishing, AIP Member Societies and Allied Organizations to produce and promote timely and accurate public dissemination of scientific advances and knowledge. Media Services staff press rooms, organize press conferences and other outreach events and produce hundreds of written stories, videos, images, infographs and other forms of public information for the media and general public every year. The AIP Statistical Research Center collects and disseminates reliable and timely data on education and employment 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 bachelors, masters and PhD holders. The center also provides survey expertise and contracts with member societies and outside organizations to carry out targeted studies. The AIP Industrial Physics Forum (IPF) brings together industrial and applied scientists, with research managers and leaders from industry, academia, and government, with the goal of advancing the contributions of physics and physicist to economic growth. IPF meetings feature invited speaker sessions that compliment AIP member society meetings. Experts discuss new applications of physics, product developments, and other opportunities for science in todays economic environment. The IPF offers participants opportunities to learn about innovations in the field, to interface with the people driving them, and to strategize about directions for future economic and scientific progress. AIP Venture Partnership Fund (VPF) uses a portion of its strategic reserves as a board-designated fund, the proceeds of which are used to fund innovative projects between one or more-member societies and AIP. For a member society to receive this grant, the society must submit a proposal to the VPF Committee. The VPF committee is made up of independent members. It's through their review process that grants are awarded.
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, and The Chief Executive Officer, ex-Officio (The Ex-Officio Directors).
FORM 990, PART VI, LINE 7b:	The member society representatives are not often called upon to take action in their role as the voting members of AIP. Responsibilities of the member society representitive include: -approving member society designated directors to the AIP Board, or their re-appointment for a second term. -approving amendments to the bylaws. -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 its assets.
FORM 990, PART VI, LINE 11b:	Form 990 Review Process: The form 990 is prepared and reviewed by the organizations independent accounting firm with the assistance of AIPs 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 managers 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. AIPs COI policy is made available to the public through AIPs website, located at www.aip.org/aip/leadership. At AIPP, Annually, all members of their Board of Managers, all officers of the company, and key employees confirm that they have read an understand and agree to comply with AIPPs COI policy. All other AIPP employees are not required to confirm annually. The CFO of AIPP certifies annually to the CFO 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:	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.
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 Senior Director of Human Resources 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 organizations conflict of interest policy and Form 990 are also available on the website, located at www.aip.org/aip/annual report.
FORM 990, PART XI, LINE 9:	Other changes in net assets or fund balances: Rare Books: ($5,027,415) Net Periodic Postretirement Cost: ($ 41,478) Other: ($ 520) Total: ($5,069,413)
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 financial statements of AIP.

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

Cat. No. 51056K

Schedule O (Form 990 or 990-EZ) 2018

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.
MediumBullet

Attach to Form 990.
MediumBullet

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

OMB No. 1545-0047

2018

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 300 MELVILLE,NY11747 46-1881138	PUBLISHING	NY	55,750,000	60,038,000	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

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

Cat. No. 50135Y

Schedule R (Form 990) 2018

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
(1) NEW CRYSTALLOGRAPHY JOURNAL LLC 1305 WALT WHITMAN RD STE 300 MELVILLE,NY11747 90-0988084	PUBLISHING	DE	NA	RELATED	-43,883	86,289		No		Yes		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		Yes	No
(1) AIP GLOBAL INC 1305 WALT WHITMAN RD STE 300 MELVILLE,NY11747 27-0602778	INTL. OFFICE	DE	AIPP	C CORP	49,428	79,263	100.000 %	Yes

Schedule R (Form 990) 2018

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) ............................

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

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) ......................

Yes

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) ...................

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 GLOBAL INC	P	329,077	COST

Schedule R (Form 990) 2018

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?
(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

Schedule R (Form 990) 2018

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 300 MELVILLE, NY 11747 EIN: 90-0988084
SCHEDULE R, PART IV, LINE 1, COLUMN D:	FOR THE CALENDAR YEAR 2018, AIP PUBLISHING LLC, A DISREGARDED ENTITY WITH RESPECT TO AIP, OWNED 100% OF AIP GLOBAL.

Schedule R (Form 990) 2018

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