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INDEPENDENCE SEAPORT MUSEUM

EIN 23-1584971 PHILADELPHIA, PA

Largest nonprofits in Pennsylvania

Revenue 2023
$4,185,635
Expenses 2023
$5,682,578

Program services were 78.1% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
A500
Classification
1200
Street
211 S COLUMBUS BLVD

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2023

Mission

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

Activities or mission (Part I)

DISCOVER PHILADELPHIA'S RIVER OF HISTORY AND WORLD OF CONNECTIONS.

  • THE INDEPENDENCE SEAPORT MUSEUM HOSTED A WIDE RANGE OF PROGRAMS, EVENTS, AND ACTIVITIES. STAFF UNDERTOOK THE FIRST OF NUMEROUS CHANGES TO UPGRADE EXISTING EXHIBITIONS AND PROGRAMS INCLUDING THE NEW SHIP MODEL GALLERY, INTEGRATION OF ITS HISTORIC BOAT COLLECTION INTO ITS EXISTING EXHIBITIONS, AND ENVIRONMENTAL UPGRADES TO THE FACILITIES. THE MUSEUM CONTINUES TO OFFER ITS AWARD-WINNING INSTALLATION "RIVER ALIVE" AS WELL AS THE EXTREMELY POPULAR EXHIBITION "TIDES OF FREEDOM". THE FORMER FOCUSES UPON THE DELAWARE RIVER AND ITS ENVIRONMENT WHILE THE LATTER CLOSELY EXAMINES THE ROLE OF AFRICAN-AMERICANS ALONG THE RIVER. IN ADDITION, THE MUSEUM OPERATES THE CRUISER OLYMPIA AND SUBMARINE BECUNA FOR THE PUBLIC. FINALLY, THE MUSEUM PROVIDES EXTENSIVE ON THE WATER EDUCATIONAL PROGRAMMING THROUGHOUT THE YEAR.

    Expenses $4,435,691 · Revenue $508,079

As filed on the 2023 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2023

As listed in Part VII of the 2023 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Peter Seibert

    CEO & President

    Total calculated
    $217,023
    From this org
    $201,800
    From related orgs
    $0
    Other
    $15,223
    Hours/week
    40 + 5 related

    Schedule J breakdown matched by us

    Base
    $201,800
    Bonus
    $0
    Other
    $0
    Deferred
    $9,815
    Nontaxable benefits
    $5,408
    Filer's total
    $217,023
  • Michael Flynn

    Executive VP and COO

    Total calculated
    $148,488
    From this org
    $135,749
    From related orgs
    $0
    Other
    $12,739
    Hours/week
    40
  • Jaewook Shim

    Controller

    Total calculated
    $114,224
    From this org
    $104,182
    From related orgs
    $0
    Other
    $10,042
    Hours/week
    40
  • Judy Baker

    Dir. of HR & Volunteer Program

    Total calculated
    $110,534
    From this org
    $104,703
    From related orgs
    $0
    Other
    $5,831
    Hours/week
    33
  • Peter Ernst

    Chair

    Total calculated
    $0
    Hours/week
    0.5
  • Courtney Disston

    Vice-Chair

    Total calculated
    $0
    Hours/week
    0.5
  • Thomas G Ashton

    Vice-Chair

    Total calculated
    $0
    Hours/week
    0.5
  • James T Giles

    Secretary

    Total calculated
    $0
    Hours/week
    0.5
  • Kenneth Wood

    Treasurer

    Total calculated
    $0
    Hours/week
    1
  • John C Devereux

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • George A Donnelly Esq

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Deborah Gibbons-Neff

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Brett E J Gorman

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Robert T Healey Jr

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Scott G Huston

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Erik C Klein

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Joseph B Lockley

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • William F Moen Jr

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Tim McGrath

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Joanne Phillips Esq

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • Hon Judge Annette Rizzo

    Director

    Total calculated
    $0
    Hours/week
    0.5
  • John P Ventura

    Director

    Total calculated
    $0
    Hours/week
    0.5

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2023
    Revenue
    $4,185,635
    Expenses
    $5,682,578
    Contributions
    $2,215,665
    Grants paid
    $0
  • 2022
    Revenue
    $3,050,797
    Expenses
    $5,133,522
    Contributions
    $873,479
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2024 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2023 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2022 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2021 · 990

    Revenue
    $3,083,203
    Expenses
    $4,759,833
    Assets (EOY)
    $22,539,825
  • 2021 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2020 · 990

    Revenue
    $2,388,161
    Expenses
    $4,314,588
    Assets (EOY)
    $28,154,026
  • 2020 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported
  • 2019 · 990

    Revenue
    $2,063,262
    Expenses
    $4,908,259
    Assets (EOY)
    $24,772,705
  • 2018 · 990

    Revenue
    $4,055,981
    Expenses
    $5,856,160
    Assets (EOY)
    $27,635,498
  • 2017 · 990

    Revenue
    $6,642,780
    Expenses
    $5,999,363
    Assets (EOY)
    $30,769,296

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2023 return

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2023, the newest we have parsed for this organization.