Civic Intelligence

Philosophical Society of Washington

EIN 52-1073697 • 501(c)3 • Washington, DC

Profile

Educational, scientific, and professional society organized in 1871 by Joseph Henry (the first secretary of the Smithsonian) providing science lectures, education, and discussion to its members and the public for the promotion of science, the advancement of learning, and the free exchange of views among its members and attendees on scientific subjects. Lectures and the accompanying discussion are recorded and made available to all, free of charge, on the Society's video channels.

2121 Massachusetts Ave NWWashington, DC 20008

www.pswscience.org

Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

Liabilities / Assets

57th percentile

0.03x

Higher debt load relative to assets than 57% of similar nonprofits.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Liabilities / Revenue

74th percentile

0.14x

Higher debt load relative to revenue than 74% of similar nonprofits.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Net Margin

79th percentile

28%

Higher net margin than 79% of similar nonprofits.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Top Officer Pay

55th percentile

$0

Higher top officer pay than 55% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

501(c)3 • $500k-$1M nonprofits • Source year 2025

Asset Growth

71st percentile

15%

Faster asset growth than 71% of similar nonprofits.

501(c)3 • $500k-$1M nonprofits • Annualized from 2024 to 2025

Revenue Growth

67th percentile

21%

Faster revenue growth than 67% of similar nonprofits.

501(c)3 • $500k-$1M nonprofits • Annualized from 2024 to 2025

Balance Sheet
Liabilities / Assets57th percentile

Assets

Up

$686,649

Up $89,471 (+15%) from 2024

Liabilities

Up

$23,066

Up $3,124 (+16%) from 2024

Net Assets

Up

$663,583

Up $86,347 (+15%) from 2024

Operations
Liabilities / Revenue74th percentileNet Margin79th percentile

Revenue

Up

$160,997

Up $28,428 (+21%) from 2024

Expenses

Up

$116,162

Up $15,071 (+15%) from 2024

Net Income

Up

$44,835

Up $13,357 (+42%) from 2024

Trend Graphs

Balance Sheet Trend

Asset Growth71st percentile

Grouped bars show assets, liabilities, and net assets across loaded filings.

$800K$600K$400K$200K$0Assets 2014: $160,638Liabilities 2014: $02014Assets 2016: $202,490Liabilities 2016: $10,0002016Assets 2017: $245,645Liabilities 2017: $10,7502017Assets 2018: $292,283Liabilities 2018: $02018Assets 2019: $336,453Liabilities 2019: $1,0352019Assets 2020: $367,786Liabilities 2020: $02020Assets 2021: $492,399Liabilities 2021: $7502021Assets 2022: $442,165Liabilities 2022: $5Net Assets 2022: $442,1602022Assets 2023: $512,675Liabilities 2023: $18,041Net Assets 2023: $494,6342023Assets 2024: $597,178Liabilities 2024: $19,942Net Assets 2024: $577,2362024Assets 2025: $686,649Liabilities 2025: $23,066Net Assets 2025: $663,5832025

Highlighted filing

2025

Assets$686,649
Liabilities$23,066
Net Assets$663,583
Open 2025 Filing

Operations Trend

Revenue Growth67th percentile

Revenue, expenses, and net income by year, with the latest filing highlighted.

$200K$150K$100K$50K$0Revenue 2014: $29,660Expenses 2014: $27,142Net Income 2014: $2,5182014Revenue 2016: $58,467Expenses 2016: $38,807Net Income 2016: $19,6602016Revenue 2017: $60,733Expenses 2017: $39,560Net Income 2017: $21,1732017Revenue 2018: $89,907Expenses 2018: $44,932Net Income 2018: $44,9752018Revenue 2019: $86,206Expenses 2019: $50,754Net Income 2019: $35,4522019Revenue 2020: $66,847Expenses 2020: $39,152Net Income 2020: $27,6952020Revenue 2021: $48,284Expenses 2021: $16,089Net Income 2021: $32,1952021Revenue 2022: $71,967Expenses 2022: $38,176Net Income 2022: $33,7912022Revenue 2023: $94,246Expenses 2023: $82,290Net Income 2023: $11,9562023Revenue 2024: $132,569Expenses 2024: $101,091Net Income 2024: $31,4782024Revenue 2025: $160,997Expenses 2025: $116,162Net Income 2025: $44,8352025

Highlighted filing

2025

Revenue$160,997
Expenses$116,162
Net Income$44,835
Open 2025 Filing

Filings

Most recent year

2025 • Form 990XML pending. An XML filing is linked for this year, but detailed extraction is still pending.

Open filing
Assets
$686,649
Liabilities
$23,066
Net assets
$663,583
Revenue
$160,997
Expenses
$116,162
Net income
$44,835
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2025XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$6.87$0.23$6.64$1.61$1.16$0.45
2024Summary only. Only limited summary data is available for this year.$5.97$0.20$5.77$1.33$1.01$0.31
2023Facts available. Structured filing facts are available, but richer extracted sections are limited.$5.13$0.18$4.95$0.94$0.82$0.12
2022XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$4.42$0.00$4.42$0.72$0.38$0.34
2021Summary only. Only limited summary data is available for this year.$4.92$0.01$0.48$0.16$0.32
2020Summary only. Only limited summary data is available for this year.$3.68$0.00$0.67$0.39$0.28
2019Summary only. Only limited summary data is available for this year.$3.36$0.01$0.86$0.51$0.35
2018Summary only. Only limited summary data is available for this year.$2.92$0.00$0.90$0.45$0.45
2017Summary only. Only limited summary data is available for this year.$2.46$0.11$0.61$0.40$0.21
2016Summary only. Only limited summary data is available for this year.$2.02$0.10$0.58$0.39$0.20
2014Summary only. Only limited summary data is available for this year.$1.61$0.00$0.30$0.27$0.03
Latest Detailed Filing

The latest 2025 filing currently has linked XML that has not been fully parsed yet. Showing the latest detailed filing from 2023 below.

Jump To
Filing Snapshot
Filing Period
Jul 1, 2022 to Jun 30, 2023
Signed
Nov 15, 2023
Return Version
2022v5.0
Gross Receipts
$98,232
Mission and Program Overview

Mission

Educational organization providing science lectures

Educational, scientific, and professional society organized in 1871 to further scientific inquiry and understanding.

Balance Sheet Detail
LineBeginningEndChange
Assets
Investments in Publicly Traded Securities$384,714$451,584▲ $66,870
Savings and Temporary Cash Investments$1,469$34,261▲ $32,792
Cash and Non-Interest-Bearing Accounts$42,878$10,028▼ $32,850
Land, Buildings, and Equipment, Net$8,910$9,382▲ $472
Intangible Assets$4,100$4,100→ $0
Inventories for Sale or Use$94$3,320▲ $3,226
Accounts Receivable$0$0→ $0
Other Notes and Loans Receivable, Net$0$0→ $0
Pledges and Grants Receivable$0$0→ $0
Receivable From Disqualified Prsn$0$0→ $0
Receivables From Officers Etc$0$0→ $0
Investments Other Securities$0$0→ $0
Investments Program Related$0$0→ $0
Loans From Officers Directors$0$0→ $0
Prepaid Expenses and Deferred Charges-$0-
Total Assets$442,165$512,675▲ $70,510
Other Assets Total$0$0→ $0
Liabilities
Deferred Revenue$0$16,825▲ $16,825
Accounts Payable and Accrued Expenses$5$1,216▲ $1,211
Grants Payable$0$0→ $0
Mortgage Notes Payable Secured by Investment Property$0$0→ $0
Unsecured Notes Loans Payable$0$0→ $0
Other Liabilities$0$0→ $0
Escrow Account Liability$0$0→ $0
Tax Exempt Bond Liabilities$0$0→ $0
Total Liabilities$5$18,041▲ $18,036
Net Assets / Fund Balance
Net Assets Without Donor Restrictions$352,160$404,634▲ $52,474
Net Assets With Donor Restrictions$90,000$90,000→ $0
Total Net Assets Fund Balance$442,160$494,634▲ $52,474
Total Liabilities and Net Assets / Fund Balance$442,165$512,675▲ $70,510

Asset Categories

AssetBook ValueDepreciationBasis
Equipment$9,382$17,721$27,103
Buildings$0$0$0
Other Land Buildings$0$0$0
Land$0-$0
Leasehold Improvements$0$0$0

Endowment Activity

PeriodBeginningContrib.Gain/LossOther UsesEnd
2022$90,000$0→ $0$0$90,000
2021$90,000$0→ $0$0$90,000
2020$90,000$0→ $0$0$90,000
2019$90,000$0→ $0$0$90,000
2018$90,000$0→ $0$0$90,000
Compensation and Service Providers
Top Officer Pay55th percentile

Board Members and Trustees

NameTitle
Larry MillsteinPresident and Program Director
Robert ThompsonVice President
Mark ClampinVice President (to October 2022)
Lloyd MitchellMembership Director
James HeelanSpecial Projects Director
Robin TaylorCorresponding Secretary
Anne McQueenMember at Large
Carey LisseMember at Large
Conor NixonMember at Large
Jared McQueenMember at Large (to December 2022)
Cameo LanceRecording Secretary
Brett MagaramTreasurer
Revenue and Support

Revenue Composition

Contributions and Grants
$51,268
Program Service Revenue
$31,707
Investment Income
$9,687
Other Revenue
$1,584
All Other Contributions
$37,193
Change in Net Assets
$11,956
Expenses and Functional Allocation

Major Expense Lines

Line ItemAmount
Other Expenses$82,290
Total Fundraising Expense$1,041
Grants and Similar Amounts Paid$0
Professional Fundraising Fees$0
Salaries, Compensation, and Employee Benefits$0

Functional Expense Allocation

Line ItemProgramManagementFundraisingTotal
Conferences and Meetings$63,295$0$0$63,295
Information Technology$4,272$2,015$0$6,287
Fees for Services Other$5,550$0$0$5,550
Depreciation Depletion$4,271$0$0$4,271
Insurance$665$655$0$1,320
Office Expenses$0$265$1,041$1,306
Advertising$198$0$0$198
Other Expenses$0$63$0$63
Total Functional Expenses$78,251$2,998$1,041$82,290
Fundraising, Events, and Gaming
Fundraising activities
No
Gaming activities
No
Professional fundraiser used
No

Fundraising and Gaming Totals

Line ItemAmount
Fundraising Direct Expenses$0
Fundraising Gross Income$0
Gaming Direct Expenses$0
Gaming Gross Income$0
Professional Fundraising Fees$0
Political and Lobbying Activity
Political campaign activity
No
Lobbying activity
No
Subject to proxy tax
No
Insider Transactions and Loans

Loans and Receivables

Line ItemBeginningEndChange
Loans from Officers, Directors, Trustees, and Key Employees$0$0→ $0
Receivables from Disqualified Persons$0$0→ $0
Receivables from Officers, Directors, Trustees, and Key Employees$0$0→ $0
Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant
No
Backup withholding compliance
Yes
Business relationship with 35% controlled entity
No
Business relationship with family members
No
Business relationship with organization members
No
Material changes to governing documents
No
Compensation from other sources disclosed
No
CEO compensation reviewed
No
Other officer compensation reviewed
No
Conflict-of-interest policy
No
Audited financial statements prepared
No
Key decisions subject to board approval
Yes
Management duties delegated
No

Governance Explanations

Form 990, Part VI, Section A, Line 1A

“All members of the General Committee (board) have one vote, except for Larry Millstein who serves as both the President and Program Director. Consequently, he has two votes.”

Form 990, Part VI, Section A, Line 2

“Larry Millstein and Robin Taylor have a family relationship. Anne McQueen and Jared McQueen have a family relationship.”

Form 990, Part VI, Section A, Line 6

“PSW Science has the following membership classes with the right to elect members of the governing body and approve certain significant decisions: Regular Members (including student members) and Life Members. Other membership classes are approved by the General Committee (board) without voting rights, including, but not limited to, Speaker Members, who have presented lectures.”

Form 990, Part VI, Section A, Line 7A

“Regular Members (including student members) and Life Members have the right to elect the officers and three at-large members of the General Committee (governing board).”

Form 990, Part VI, Section A, Line 7B

“Regular Members (including student members) and Life Members have the right to approve any changes to the Bylaws.”

Form 990, Part VI, Section B, Line 11B

“Form 990 is prepared by members of the General Committee (board), reviewed by the President, and provided to members of the General Committee prior to filing for review and comment.”

Form 990, Part VI, Section B, Line 15

“None of the officers received any compensation from PSW Science. There are no paid employees.”

Form 990, Part VI, Section C, Line 19

“There were no requests for governing documents and financial statements during the tax year. There is no written conflict of interest policy.”

Filing and Contact Details

Filer

Filer Name
Philosophical Society of Washington
EIN
52-1073697
Phone
2025992858
Address
2121 Massachusetts Ave NW, Washington, DC 20008
Doing Business As
PSW Science

Signing Officer

Name
Larry Millstein
Title
President
Phone
2022626720
Signed
2023-11-15

Organization Details

Principal Officer
Larry S Millstein
Formed
1871
Legal Domicile
Dc
Voting Board Members
9
Independent Board Members
9
Employees
0
Volunteers
17
Supplemental Narrative

Additional Explanations

Form 990, Part XI, Line 9

“Rounding.”

Form 990, Part XII, Line 1

“PSW Science changed its method of accounting from the cash method to the accrual method on July 1, 2022.”

Financial Statement Notes

Schedule D, Part V, Line 4

“$90,000 of PSW Science's total assets have been designated by the General Committee (board) to be held as a reserve and invested as part of PSW Science's long-term investments, with investment earnings therefrom to be used for general operating expenses.”

Raw XML AppendixShowing 400 of 713 raw XML fields

This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

Path#Value
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IRS990/Form990PartVIISectionAGrp/PersonNm0Larry Millstein
IRS990/Form990PartVIISectionAGrp/PersonNm1Robert Thompson
IRS990/Form990PartVIISectionAGrp/PersonNm2Robin Taylor
IRS990/Form990PartVIISectionAGrp/PersonNm3Cameo Lance
IRS990/Form990PartVIISectionAGrp/PersonNm4Brett Magaram
IRS990/Form990PartVIISectionAGrp/PersonNm5Anne McQueen
IRS990/Form990PartVIISectionAGrp/PersonNm6Carey Lisse
IRS990/Form990PartVIISectionAGrp/PersonNm7Conor Nixon
IRS990/Form990PartVIISectionAGrp/PersonNm8Lloyd Mitchell
IRS990/Form990PartVIISectionAGrp/PersonNm9James Heelan
IRS990/Form990PartVIISectionAGrp/PersonNm10Mark Clampin
IRS990/Form990PartVIISectionAGrp/PersonNm11Jared McQueen
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IRS990/Form990PartVIISectionAGrp/TitleTxt0President and Program Director
IRS990/Form990PartVIISectionAGrp/TitleTxt1Vice President
IRS990/Form990PartVIISectionAGrp/TitleTxt2Corresponding Secretary
IRS990/Form990PartVIISectionAGrp/TitleTxt3Recording Secretary
IRS990/Form990PartVIISectionAGrp/TitleTxt4Treasurer
IRS990/Form990PartVIISectionAGrp/TitleTxt5Member at Large
IRS990/Form990PartVIISectionAGrp/TitleTxt6Member at Large
IRS990/Form990PartVIISectionAGrp/TitleTxt7Member at Large
IRS990/Form990PartVIISectionAGrp/TitleTxt8Membership Director
IRS990/Form990PartVIISectionAGrp/TitleTxt9Special Projects Director
IRS990/Form990PartVIISectionAGrp/TitleTxt10Vice President (to October 2022)
IRS990/Form990PartVIISectionAGrp/TitleTxt11Member at Large (to December 2022)
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IRS990/MissionDesc0Educational, scientific, and professional society organized in 1871 by Joseph Henry (the first secretary of the Smithsonian) providing science lectures, education, and discussion to its members and the public for the promotion of science, the advancement of learning, and the free exchange of views among its members and attendees on scientific subjects. Lectures and the accompanying discussion are recorded and made available to all, free of charge, on the Society's video channels.
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