The American Physical Society (APS) is a 501(c)(3) nonprofit scientific membership organization headquartered in College Park, Maryland. Founded in 1899, APS is classified as a science and technology research institute and professional society. The organization operates as a remote-first entity with three office locations: headquarters in College Park, MD; a District of Columbia office in Washington; and a New York office in Hauppauge. APS employs approximately 346-515 staff members and operates in 44 countries globally.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$313.0M
+5.6% YoY
Annual Giving
$1.7M
-18.0% YoY
Grant Count
37
-15.9% YoY
Avg Grant Size
$47K
-2.5% YoY
Mission & Focus Areas
APS strives to:
- Be the leading voice for physics and an authoritative source of physics information for the advancement of physics and the benefit of humanity
- Provide effective programs in support of the physics community and the conduct of physics
- Collaborate with national scientific societies for the advancement of science, science education, and the science community
- Cooperate with international physics societies to promote physics, support physicists worldwide, and foster international collaboration
- Promote an active, engaged, and diverse membership and support the activities of its units and members
The organization's objective is to advance physics by fostering a vibrant, inclusive, and global community dedicated to science and society.
Primary Program Areas:
- Physics research programs: research publications
- Physics research programs: education and outreach
- Physics research programs: scientific meetings
- Physics research programs: membership operations
- Physics research programs: prizes and awards
Grantmaking
APS functions both as a grant recipient and as a grantmaker to other organizations.
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Geographic Focus
Where this funder awards grants
APS funding priorities are primarily concentrated in California, Massachusetts, and the District of Columbia, though the organization operates globally across 44 countries.
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
As of 2024:
- Total Assets: $313,014,241
- Total Revenue: $106,332,062
- Total Expenses: $90,947,319
- Total Liabilities: $33,900,000
- Annual Income: $150,500,000
Tax Status: Tax-exempt since January 1945 (IRS Ruling Year: 1945); EIN: 13-1656610
Charity Rating: Four-Star rating with 96% overall score from Charity Navigator, reflecting strong accountability and finance practices.
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $313,014,241 | $296,409,286 | $262,299,827 |
| Revenue | $106,332,062 | $118,837,990 | $71,212,099 |
| Expenses | $90,947,319 | $80,092,003 | $71,210,235 |
| Qualifying Distributions | — | — | — |
| Net Investment Income | $28,118,200 | $46,942,556 | $5,335,883 |
| Distributable Amount | — | — | — |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2024
Grant Size Distribution
166 grants across all recorded years
Open Grants
90 open opportunities from American Physical Society
4CS Harry Lustig Award
AMERICAN PHYSICAL SOCIETY
Amount
Varies
Deadline
Rolling / Open
APS DAP Student/Postdoc Travel Grants
AMERICAN PHYSICAL SOCIETY
Amount
Up to US $500
Deadline
Rolling / Open
APS DBIO Travel Awards
AMERICAN PHYSICAL SOCIETY
Amount
Varies
Deadline
Rolling / Open
Giving History
Grant recipients and amounts by year
No grants recorded for .
Leadership & Key People
Leadership team and compensation from IRS filings
- Jonathan Bagger: Principal Officer
- Brad Marston: President (joined January 2026)
- Kevin Kase: Director of Development
- Francis Slakey: Chief External Affairs Officer
- Beth Guerra Gunzel: Chief Human Resources Officer
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| BRAD MARSTON | VICE PRESIDENT (as of 1/24) | 5 | — |
| DAVID SEILER | TREASURER | 5 | — |
| JEANETTE RUSSO | CORPORATE SECRETARY | 40 | $156,718 |
| JOHN DOYLE | PRESIDENT-ELECT | 5 | — |
| JONATHAN BAGGER | CHIEF EXECUTIVE OFFICER | 40 | $677,147 |
| ROBERT ROSNER | PAST PRESIDENT | 20 | — |
| YOUNG-KEE KIM | PRESIDENT | 40 | — |
| DAVID WEISS | DIRECTOR (as of 1/24) | 4 | — |
| JOHN F WILKERSON | DIRECTOR | 4 | — |
| KANDICE TANNER | DIRECTOR | 4 | — |
| KAREN HALLBERG | DIRECTOR | 4 | — |
| LAURIE MCNEIL | DIRECTOR | 4 | — |
| NAI-CHANGE YEH | DIRECTOR (as of 1/24) | 4 | — |
| PETER SCHIFFER | DIRECTOR | 4 | — |
| RANDALL KAMIEN | EDITOR-IN-CHIEF | 10 | — |
| WILLIAM BARLETTA | DIRECTOR | 4 | — |
| XUN-LI WANG | DIRECTOR (as of 1/24) | 4 | — |
| BETH GUNZEL | CHIEF HUMAN RESOURCES OFFICER | 40 | $293,802 |
| FRANCIS SLAKEY | CHIEF EXTERNAL AFFAIRS OFFICER | 40 | $319,356 |
| HASSANA HOWE | CHIEF EXPERIENCE & ENGAGEMENT | 40 | $261,043 |
| JANE HOPKINS GOULD | CFOO | 40 | $405,087 |
| MARK DOYLE | CHIEF INFORMATION OFFICER | 40 | $326,861 |
| RACHEL BURLEY | CHIEF PUBLICATIONS OFFICER | 40 | $394,222 |
| AMY FLATTEN | DIR OF INTERNATIONAL AFFAIRS | 40 | $239,749 |
| CHRISTINE GIACCONE | DIR OF JOURNAL OPERATIONS | 40 | $259,266 |
| DYLAN MOULTON | GLOBAL SALES DIRECTOR | 40 | $252,665 |
| JEFF LEWANDOWSKI | DIR OF PUBLISHING | 40 | $209,307 |
| KENNEDY JESSICA THOMAS | EXECUTIVE EDITOR | 40 | $221,553 |
| SARA CONNERS | DIRECTOR OF SPECIAL PROJECTS | 40 | $213,039 |
Contact Information
Headquarters: American Physical Society 1 Physics Ellipse College Park, MD 20740 (301) 209-3200 (301) 209-0865 FAX
Washington, DC Office: 555 12th St. NW, Suite 250 Washington, DC 20004 (202) 662-8700 (202) 662-8711 FAX
New York Office: 100 Motor Parkway, Suite 110 Hauppauge, NY 11788 (301) 209-3200
Website: aps.org
Subject Areas
Focus areas based on grantmaking activity
Data last updated April 2026. Sourced from IRS Form 990-PF filings. Research dossier generated April 2026.
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