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DONALD E MCMAHON FOUNDATION

EIN 74-2077762 HOUSTON, TX

Largest nonprofits in Texas

Revenue 2025
$629,288
Expenses 2025
$124,148

Program services were 87.3% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
Classification
1000
Street
7676 WOODWAY DR STE 320

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).

Mission and programs · 2025

Mission

MEDICAL RESEARCH AND EQUIPMENT PURCHASES FOR OTHER CHARITABLE ORGANIZATIONS AND EDUCATIONAL SCHOLARSHIPS

  • MEDICAL RESEARCH AND EQUIPMENT PURCHASES FOR OTHER CHARITABLE ORGANIZATIONS AND EDUCATIONAL SCHOLARSHIPS

    Expenses $108,435

As filed on the 2025 return.

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.

  • ED McMAHON

    President

    Total calculated
    $0
    Hours/week
    2

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
    $629,288
    Expenses
    $124,148
    Contributions
    $0
    Grants paid
    $108,435
  • 2024
    Revenue
    $26,267
    Expenses
    $89,849
    Contributions
    $0
    Grants paid
    $78,950
  • 2023
    Revenue
    -$11,887
    Expenses
    $82,987
    Contributions
    $0
    Grants paid
    $71,874
  • 2022
    Revenue
    $76,141
    Expenses
    $92,683
    Contributions
    $0
    Grants paid
    $81,361

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

  • 2021 · 990

    Revenue
    $56,268
    Expenses
    $83,763
    Assets (EOY)
    $774,285

  • 2020 · 990

    Revenue
    $14,527
    Expenses
    $41,843
    Assets (EOY)
    $801,780

  • 2019 · 990

    Revenue
    $49,546
    Expenses
    $115,251
    Assets (EOY)
    $829,096

  • 2018 · 990

    Revenue
    $32,282
    Expenses
    $185,095
    Assets (EOY)
    $894,801

  • 2017 · 990

    Revenue
    -$119,796
    Expenses
    $92,828
    Assets (EOY)
    $1,047,614

  • 2016 · 990

    Revenue
    $71,232
    Expenses
    $24,970
    Assets (EOY)
    $1,260,238

  • 2014 · 990

    Revenue
    $63,346
    Expenses
    $38,778
    Assets (EOY)
    $1,212,852

  • 2013 · 990

    Revenue
    $85,894
    Expenses
    $49,206
    Assets (EOY)
    $1,188,284

  • 2012 · 990

    Revenue
    not reported
    Expenses
    $47,261
    Assets (EOY)
    $1,151,596

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.

Grants made

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

Where these grants went next →

Grants received

No itemized grant names this organization as a recipient. Only grants over $5,000 are itemized, and only by filers of the full Form 990.

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 SOUNK.

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 2025, the newest we have parsed for this organization.