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Form 990-PFTax year 2025EIN 04-2104293

William Townsend Porter Foundation

A private foundation in Boston, MA. Its return for tax year 2025 lists 4 grants and $177,626 paid in grants.

See which foundations fund work like yours Matching by cause, place and grant size

Tax year 2025 (period ending Mar 31, 2026), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Preselected only

The return checks the box saying the foundation gives only to preselected organizations and does not accept unsolicited requests.

Assets and giving by year

8 returns on file
Grants paid by tax year. The latest year is in blue.

  • Tax year 2025

    $177,626

    Grants listed
    4
    Assets, end of year
    $4,360,520

  • Tax year 2024

    $197,367

    Grants listed
    6
    Assets, end of year
    $4,205,422

  • Tax year 2023

    $185,500

    Grants listed
    3
    Assets, end of year
    $4,230,745

  • Tax year 2022

    $166,000

    Grants listed
    3
    Assets, end of year
    $3,766,020

  • Tax year 2021

    $176,000

    Grants listed
    3
    Assets, end of year
    $4,151,058

  • Tax year 2020

    $126,500

    Grants listed
    2
    Assets, end of year
    $4,128,631

  • Tax year 2019

    $149,300

    Grants listed
    3
    Assets, end of year
    $3,281,545

  • Tax year 2018

    $149,300

    Grants listed
    3
    Assets, end of year
    $3,484,100

Grants paid in 2025

4 grants, largest first

As listed on the return.

  1. American Physiological SocietyBethesda, MD

    Support

    $141,500
  2. Marine Biological LaboratoryWoods Hole, MA

    Support

    $17,000
  3. University of Louisville Research FoundationLouisville, KY

    Support

    $10,000
  4. The Board of Trustees of the Leland Stanford Junior UniversityRedwood City, CA

    Support

    $9,126

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Science and technology1 grant $17,00063% of the total
  2. Education1 grant $10,00037% of the total

By State

Grants to organizations with a US address, latest year.

  1. Maryland1 grant $141,500
  2. Massachusetts1 grant $17,000
  3. Kentucky1 grant $10,000
  4. California1 grant $9,126

Officers, directors and trustees

9 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • Pamela J Gunter-Smith PHDPRESIDENT Hours 1Pay $0
  • Basil StewartTREASURER Hours 2Pay $0
  • Arthur Bpage EsqCLERK Hours 1Pay $0
  • David L Van Vactor PHDTRUSTEE Hours 1Pay $0
  • Sheila M ThomasTRUSTEE Hours 1Pay $0
  • Martin FrankTRUSTEE Hours 1Pay $0
  • Eric Floyd MS Mba PHDTRUSTEE Hours 1Pay $0
  • Jean King PHDTRUSTEE Hours 1Pay $0
  • Robert Carter MPH PHDTRUSTEE Hours 1Pay $0

The return

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