Independence Seaport Museum

Public charity · Grantmaker Philadelphia, PA EIN: 23-1584971

To discover philadelphia's river of history and world of connections. Serving a wide and diverse audience and holding its collections in trust for the community, the museum tells the stories of the people, historical events and environmental changes of the Delaware river and its tributaries. It looks to a broad regional definition of the river to include both philadelphia and camden as well as portions of the southern coast of New Jersey and the schuylkill river drainage. The museum is the leading educational organization in the region dedicated to the history and culture of the Delaware river and its estuaries. We focus upon building k-16 educational programs that engae students in the rich history of this region as it relates to the waterways in addtion to providng stem and environmental educational opportunities. Our educational mission is to build an understanding of the historical, cultural, and environmental importance of the Delaware river watershed. The museum retains a nationa

Key facts about Independence Seaport Museum

EIN
23-1584971
Latest 990 filing
Form 990, 2025
Total assets
$19,528,398

Data from IRS Form 990, 2025; updated September 2026.

Financial Overview

From 2025 IRS Form 990 · View filing

Total Assets

$19.5M

-10.5% YoY

Revenue

$3.3M

-20.9% YoY

Net Investment Income

$1.3M

+77.1% YoY

Expenses

$6.4M

+13.1% YoY

About Independence Seaport Museum

Based on IRS filings

Independence Seaport Museum is a public charity focused on Arts, Culture & Humanities, based in Philadelphia, PA. IRS filing data is available from 2020 through 2025. As of 2025, the organization holds $19.5M in total assets. Net investment income was $1.3M.

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

2states

Cities

PhiladelphiaAnnapolisLinwood

Giving Over Time

Total grant dollars and number of grants per year

$0$20K$40K$60K1 grant2020 0 grants2021 3 grants2022 0 grants2023 0 grants2024 0 grants2025

From 2020 to 2022, annual grant giving ranged from $43K (2022) to $52K (2020). In 2022 it made 3 grants totaling $43K.

Grant Insights

How this funder distributes its grants

Grant Size Distribution

3 grants across all recorded years

3<$50K$50–100K$100–250K$250–500K$500K–1M$1–5M$5M+

The most common grant size was under $50K: 3 grants of 3 (100%).

Giving History

Grant recipients and amounts by year

No grants recorded for 2025.

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Net Investment Income
$0$2M$4M$6M$8M2020 2021 2022 2023 2024 2025
Metric202520242023
Total Assets$19,528,398$21,826,969$21,290,179
Revenue$3,311,365$4,185,635$3,050,797
Expenses$6,426,754$5,682,578$5,133,522
Net Investment Income$1,288,219$727,542$808,892

Data update history

When this profile's IRS filing data changed on Grantable

  1. Added Form 990 for fiscal year 2025 (received by the IRS May 5, 2026)
  2. IRS filings on file for fiscal years 2020–2024

Leadership & Key People

Officers and directors from IRS filings

Independence Seaport Museum is led by Peter Seibert, CEO & President since 2022 (on filings since 2021); 6 of 24 officers listed in 2025 are compensated.

Officers on the 2025 filing

  • Peter Seibert

    CEO & President

    CEO & President - From → CEO & President, 2022

    On filings since 2021

    40 hrs/week

    $138K (2022) → $226K (2025)

  • Peter Ernst

    Chair

    Vice Chair → Chair, 2023

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • Judy Baker

    Director of Hr & Volunteer Program

    On filings since 2024

    33 hrs/week

    $105K (2024) → $110K (2025)

  • Margaret Ann North

    Director of Development

    New on the 2025 filing

    40 hrs/week

    $101K (2025)

  • Michael Timothy Madeja

    Director of Education

    New on the 2025 filing

    40 hrs/week

    $117K (2025)

  • Deborah Gibbons-Neff

    Director

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • John C Devereux

    Director

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • Tim McGrath

    Director

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • Joseph B Lockley

    Director

    On filings since 2021

    0.5 hrs/week

    No compensation reported

  • Scott G Huston

    Director

    On filings since 2021

    0.5 hrs/week

    No compensation reported

  • William F. Moen Jr.

    Director

    On filings since 2021

    0.5 hrs/week

    No compensation reported

  • Brett E J Gorman

    Director

    On filings since 2022

    0.5 hrs/week

    No compensation reported

  • Erik C Klein

    Director

    On filings since 2023

    0.5 hrs/week

    No compensation reported

  • Joanne Phillips Esq.

    Director

    On filings since 2023

    0.5 hrs/week

    No compensation reported

  • John P Ventura

    Director

    On filings since 2023

    0.5 hrs/week

    No compensation reported

  • George A Donnelly Esq.

    Director

    On filings since 2024

    0.5 hrs/week

    No compensation reported

  • Judge Annette Rizzo

    Director

    On filings since 2024

    0.5 hrs/week

    No compensation reported

  • Robert T Healey Jr.

    Director

    On filings since 2024

    0.5 hrs/week

    No compensation reported

  • Michael Flynn

    Executive Vice President & COO

    On filings since 2020

    40 hrs/week

    $101K (2020) → $145K (2025)

  • Jaewook Shim

    Controller

    On filings since 2024

    40 hrs/week

    $104K (2024) → $112K (2025)

  • Courtney Disston

    Vice Chair

    Director → Vice Chair, 2023

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • James T Giles

    Secretary

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • Thomas G Ashton

    Vice Chair

    Director → Treasurer, 2021

    Treasurer → Vice Chair, 2023

    On filings since 2020

    0.5 hrs/week

    No compensation reported

  • Kenneth Wood

    Treasurer

    Director → Treasurer, 2023

    On filings since 2022

    0.5 hrs/week

    No compensation reported

Former officers (19)
  • Former: Joe Benton (2023) — Director
  • Former: Arthur Sulzer (2020–2022) — Director
  • Former: Jonathan Epstein MD (2020–2022) — Director
  • Former: Joseph Benton (2020–2022) — Director
  • Former: Max Kaiserman (2020–2022) — Director
  • Former: Pamela Switlik (2020–2022) — Director
  • Former: Peter H Havens (2020–2022) — Chairman
  • Former: Timothy McGrath (2022) — Director
  • Former: John Brady (2020–2021) — President & CEO
  • Former: William L Lane III (2020–2021) — Director
  • Former: Jennifer Blasy (2021) — Controller-
  • Former: Anthony N Brady (2020) — Director
  • Former: Gordon L Keen Jr. (2020) — Director -
  • Former: James W McLane (2020) — Director
  • Former: Jason Ingle (2020) — Director -
  • Former: Jeff Theobald (2020) — Director
  • Former: John A Gregg (2020) — Director
  • Former: Jonathan Kemmerley (2020) — Director
  • Former: Richard A Hayne (2020) — Director

Data from IRS Form 990 filings, 2020–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.

Compensation Overview

From 2025 IRS filing

Peter Seibert — CEO & President: $226KPeter SeibertCEO & President$226KMichael Flynn — Executive VP and COO: $145KMichael FlynnExecutive VP and COO$145KMichael Timothy Madeja — Director of Education: $117KMichael Timothy MadejaDirector of Education$117KJaewook Shim — Controller: $112KJaewook ShimController$112KJudy Baker — Dir. of HR & Volunteer Program: $110KJudy BakerDir. of HR & Volunteer Program$110KMargaret Ann North — Director of Development: $101KMargaret Ann NorthDirector of Development$101K

The highest reported compensation on the 2025 filing was $226K, to Peter Seibert (CEO & President). 6 officers or directors reported compensation on that filing.

Frequently asked questions about Independence Seaport Museum

How large is Independence Seaport Museum?

Independence Seaport Museum reported $19.5M in total assets on its 2025 IRS Form 990. Its revenue that year was $3.3M.

What is Independence Seaport Museum?

Independence Seaport Museum is a public charity focused on Arts, Culture & Humanities, based in Philadelphia, PA. It holds $19.5M in total assets as of 2025.

Where does Independence Seaport Museum operate?

Independence Seaport Museum has awarded grants in Maryland, Pennsylvania.

What is Independence Seaport Museum's EIN?

Independence Seaport Museum's EIN (Employer Identification Number) is 23-1584971. IRS Form 990 filing data is available on this page for 2020–2025.

Data last updated September 2026. Sourced from IRS Form 990 filings.

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