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NATIONAL AQUARIUM INC

EIN 52-1121163 BALTIMORE, MD

Revenue 2025
$54,351,794
Expenses 2025
$60,539,359

Program services were 69.5% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
D500
Classification
1000
Street
501 E PRATT ST

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).

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • ADAM BORDEN

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • VICTOR ABIAMIRI

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • TODD CHESTER THRU 3125

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • CELINE COUSTEAU

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • DAVID DARDIS

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • COLLEEN DILENSCHNEIDER

    CHAIR

    Total calculated
    $0
    Hours/week
    1

  • JACK DWYER

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • NANCY GRASMICK

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • CHRIS GRIFFITH

    TREASURER

    Total calculated
    $0
    Hours/week
    1

  • KATHRYN MATTHEWS

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2

  • ROBERT MATTHEWS

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • MAGGIE MCINTOSH

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • MERRIE MOWEN

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2 + 2 related

  • ROY PRATHER III

    SECRETARY

    Total calculated
    $0
    Hours/week
    2

  • JENNIFER REYNOLDS

    VICE CHAIR

    Total calculated
    $0
    Hours/week
    2

  • ENRIC SALA

    BOARD MEMBER (THRU 3/1/25)

    Total calculated
    $0
    Hours/week
    1

  • JAYSON WILLIAMS

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • MARC WYATT

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2

  • CHUCK TILDON

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2

  • MARC BUNTING

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    2

  • CAROLYN HOWELL

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • SAM O'NEIL

    BOARD MEMBER (THRU 5/1/25)

    Total calculated
    $0
    Hours/week
    1

  • SAMEER SIDH

    BOARD MEMBER (THRU 12/1/25)

    Total calculated
    $0
    Hours/week
    1

  • MARK WASSERMAN

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

  • KERRY WATSON

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

The first 25 listed. 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. Earlier years are each on their own filing page.

Filings

  • 2025
    Revenue
    $54,351,794
    Expenses
    $60,539,359
    Contributions
    $16,060,531
    Grants paid
    $50,604
  • 2024
    Revenue
    $74,375,786
    Expenses
    $76,249,119
    Contributions
    $28,736,222
    Grants paid
    $20,190,860
  • 2023
    Revenue
    $55,641,673
    Expenses
    $54,083,927
    Contributions
    $16,175,128
    Grants paid
    $39,080
  • 2022
    Revenue
    $54,816,849
    Expenses
    $51,432,748
    Contributions
    $19,586,701
    Grants paid
    $51,125

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
    $60,590,294
    Expenses
    $47,737,626
    Assets (EOY)
    $97,374,969

  • 2021 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2020 · 990

    Revenue
    $25,536,884
    Expenses
    $44,699,556
    Assets (EOY)
    $91,756,436

  • 2020 · 990-T

    Revenue
    not reported
    Expenses
    not reported
    Assets (EOY)
    not reported

  • 2019 · 990

    Revenue
    $50,248,514
    Expenses
    $50,305,927
    Assets (EOY)
    $104,725,819

  • 2018 · 990

    Revenue
    $47,658,956
    Expenses
    $51,456,166
    Assets (EOY)
    $107,715,727

  • 2017 · 990

    Revenue
    $51,206,582
    Expenses
    $57,645,060
    Assets (EOY)
    $114,299,130

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

Where these grants went next →

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 2025 return

Declared as related by

Taxable family

From Schedule R Parts I, III and IV: entities that legally are the filer, and taxable partnerships, corporations and trusts it is related to. These record ownership and control, not shared board members or money.

Disregarded entities on its 2025 return

  • NANI LLC

    REAL ESTATE HOLDING · MD · income $0 · assets $0

  • 2328 CEDLEY STREET LLC

    REAL ESTATE HOLDING · MD · income $0 · assets $0

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 23 October 2026, for every organization at once. Returns through tax year 2025, the newest we have parsed for this organization.